prvm_cmds.c

// AK
// Basically every vm builtin cmd should be in here.
// All 3 builtin and extension lists can be found here
// cause large (I think they will) parts are from pr_cmds the same copyright like in pr_cmds
// also applies here

#include "quakedef.h"

#include "prvm_cmds.h"
#include "libcurl.h"
#include <time.h>

#include "cl_collision.h"
#include "clvm_cmds.h"
#include "csprogs.h"
#include "ft2.h"
#include "mdfour.h"

extern cvar_t prvm_backtraceforwarnings;
extern cvar_t prvm_gameplayfix_rintisround;
#ifdef USEODE
extern dllhandle_t ode_dll;
#endif

// LadyHavoc: changed this to NOT use a return statement, so that it can be used in functions that must return a value
void VM_Warning(prvm_prog_t *prog, const char *fmt, ...)
{
	va_list argptr;
	char msg[MAX_INPUTLINE];
	static double recursive = -1;
	int outfd = sys.outfd;

	// set output to stderr
	sys.outfd = fileno(stderr);

	va_start(argptr,fmt);
	dpvsnprintf(msg,sizeof(msg),fmt,argptr);
	va_end(argptr);

	Con_Printf(CON_WARN "%s VM warning: %s", prog->name, msg);

	// TODO: either add a cvar/cmd to control the state dumping or replace some of the calls with Con_Printf [9/13/2006 Black]
	if(prvm_backtraceforwarnings.integer && recursive != host.realtime) // NOTE: this compares to the time, just in case if PRVM_PrintState causes a Host_Error and keeps recursive set
	{
		recursive = host.realtime;
		PRVM_PrintState(prog, 0);
		recursive = -1;
	}

	// restore configured outfd
	sys.outfd = outfd;
}


//============================================================================
// Common

// TODO DONE: move vm_files and vm_fssearchlist to prvm_prog_t struct
// TODO: move vm_files and vm_fssearchlist back [9/13/2006 Black]
// TODO: (move vm_files and vm_fssearchlist to prvm_prog_t struct again) [2007-01-23 LadyHavoc]
// TODO: will this war ever end? [2007-01-23 LadyHavoc]

void VM_CheckEmptyString(prvm_prog_t *prog, const char *s)
{
	if (ISWHITESPACE(s[0]))
		prog->error_cmd("%s: Bad string", prog->name);
}

qbool PRVM_ConsoleCommand(prvm_prog_t *prog, const char *text, size_t textlen, int *func, qbool preserve_self, int curself, double ptime, const char *error_message)
{
	int restorevm_tempstringsbuf_cursize;
	int save_self = 0; // hush compiler warning
	qbool r = false;

	if(!prog->loaded)
		return false;

	if(func)
	{
		if(preserve_self)
			save_self = PRVM_gameglobaledict(self);
		if(ptime)
			PRVM_gameglobalfloat(time) = ptime;
		PRVM_gameglobaledict(self) = curself;
		restorevm_tempstringsbuf_cursize = prog->tempstringsbuf.cursize;
		PRVM_G_INT(OFS_PARM0) = PRVM_SetTempString(prog, text, textlen);
		prog->ExecuteProgram(prog, *func, error_message);
		prog->tempstringsbuf.cursize = restorevm_tempstringsbuf_cursize;
		if(preserve_self)
			PRVM_gameglobaledict(self) = save_self;
		r = (int) PRVM_G_FLOAT(OFS_RETURN) != 0;
	}

	return r;
}

void VM_GenerateFrameGroupBlend(prvm_prog_t *prog, framegroupblend_t *framegroupblend, const prvm_edict_t *ed)
{
	// self.frame is the interpolation target (new frame)
	// self.frame1time is the animation base time for the interpolation target
	// self.frame2 is the interpolation start (previous frame)
	// self.frame2time is the animation base time for the interpolation start
	// self.lerpfrac is the interpolation strength for self.frame2
	// self.lerpfrac3 is the interpolation strength for self.frame3
	// self.lerpfrac4 is the interpolation strength for self.frame4
	// pitch angle on a player model where the animator set up 5 sets of
	// animations and the csqc simply lerps between sets)
	framegroupblend[0].frame = (int) PRVM_gameedictfloat(ed, frame     );
	framegroupblend[1].frame = (int) PRVM_gameedictfloat(ed, frame2    );
	framegroupblend[2].frame = (int) PRVM_gameedictfloat(ed, frame3    );
	framegroupblend[3].frame = (int) PRVM_gameedictfloat(ed, frame4    );
	framegroupblend[0].start =       PRVM_gameedictfloat(ed, frame1time);
	framegroupblend[1].start =       PRVM_gameedictfloat(ed, frame2time);
	framegroupblend[2].start =       PRVM_gameedictfloat(ed, frame3time);
	framegroupblend[3].start =       PRVM_gameedictfloat(ed, frame4time);
	framegroupblend[1].lerp  =       PRVM_gameedictfloat(ed, lerpfrac  );
	framegroupblend[2].lerp  =       PRVM_gameedictfloat(ed, lerpfrac3 );
	framegroupblend[3].lerp  =       PRVM_gameedictfloat(ed, lerpfrac4 );
	// assume that the (missing) lerpfrac1 is whatever remains after lerpfrac2+lerpfrac3+lerpfrac4 are summed
	framegroupblend[0].lerp = 1 - framegroupblend[1].lerp - framegroupblend[2].lerp - framegroupblend[3].lerp;
}

// LadyHavoc: quite tempting to break apart this function to reuse the
//            duplicated code, but I suspect it is better for performance
//            this way
void VM_FrameBlendFromFrameGroupBlend(frameblend_t *frameblend, const framegroupblend_t *framegroupblend, const model_t *model, double curtime)
{
	int sub2, numframes, f, i, k;
	int isfirstframegroup = true;
	int nolerp;
	double sublerp, lerp, d;
	const animscene_t *scene;
	const framegroupblend_t *g;
	frameblend_t *blend = frameblend;

	memset(blend, 0, MAX_FRAMEBLENDS * sizeof(*blend));

	// rpolzer: Not testing isanimated here - a model might have
	// "animations" that move no vertices (but only bones), thus rendering
	// may assume it's not animated while processing can't.
	if (!model)
	{
		blend[0].lerp = 1;
		return;
	}

	nolerp = ((model->type == mod_sprite) ? !r_lerpsprites.integer : !r_lerpmodels.integer) || (model->nolerp == true);
	numframes = model->numframes;
	for (k = 0, g = framegroupblend;k < MAX_FRAMEGROUPBLENDS;k++, g++)
	{
		f = g->frame;
		if ((unsigned int)f >= (unsigned int)numframes)
		{
			if (developer_extra.integer)
				Con_DPrintf("VM_FrameBlendFromFrameGroupBlend: no such frame %d in model %s\n", f, model->name);
			f = 0;
		}
		d = lerp = g->lerp;
		if (lerp <= 0)
			continue;
		if (nolerp)
		{
			if (isfirstframegroup)
			{
				d = lerp = 1;
				isfirstframegroup = false;
			}
			else
				continue;
		}
		if (model->animscenes)
		{
			scene = model->animscenes + f;
			f = scene->firstframe;
			if (scene->framecount > 1)
			{
				// this code path is only used on .zym models and torches
				sublerp = scene->framerate * (curtime - g->start);
				f = (int) floor(sublerp);
				sublerp -= f;
				sub2 = f + 1;
				if (sublerp < (1.0 / 65536.0f))
					sublerp = 0;
				if (sublerp > (65535.0f / 65536.0f))
					sublerp = 1;
				if (nolerp)
					sublerp = 0;
				if (scene->loop)
				{
					f = (f % scene->framecount);
					sub2 = (sub2 % scene->framecount);
				}
				f = bound(0, f, (scene->framecount - 1)) + scene->firstframe;
				sub2 = bound(0, sub2, (scene->framecount - 1)) + scene->firstframe;
				d = sublerp * lerp;
				// two framelerps produced from one animation
				if (d > 0)
				{
					for (i = 0;i < MAX_FRAMEBLENDS;i++)
					{
						if (blend[i].lerp <= 0 || blend[i].subframe == sub2)
						{
							blend[i].subframe = sub2;
							blend[i].lerp += d;
							break;
						}
					}
				}
				d = (1 - sublerp) * lerp;
			}
		}
		if (d > 0)
		{
			for (i = 0;i < MAX_FRAMEBLENDS;i++)
			{
				if (blend[i].lerp <= 0 || blend[i].subframe == f)
				{
					blend[i].subframe = f;
					blend[i].lerp += d;
					break;
				}
			}
		}
	}
}

void VM_UpdateEdictSkeleton(prvm_prog_t *prog, prvm_edict_t *ed, const model_t *edmodel, const frameblend_t *frameblend)
{
	if (ed->priv.server->skeleton.model != edmodel)
	{
		VM_RemoveEdictSkeleton(prog, ed);
		ed->priv.server->skeleton.model = edmodel;
	}
	if (!ed->priv.server->skeleton.model || !ed->priv.server->skeleton.model->num_bones)
	{
		if(ed->priv.server->skeleton.relativetransforms)
			Mem_Free(ed->priv.server->skeleton.relativetransforms);
		ed->priv.server->skeleton.relativetransforms = NULL;
		return;
	}

	{
		int skeletonindex = -1;
		skeleton_t *skeleton;
		skeletonindex = (int)PRVM_gameedictfloat(ed, skeletonindex) - 1;
		if (skeletonindex >= 0 && skeletonindex < MAX_EDICTS && (skeleton = prog->skeletons[skeletonindex]) && skeleton->model->num_bones == ed->priv.server->skeleton.model->num_bones)
		{
			// custom skeleton controlled by the game (FTE_CSQC_SKELETONOBJECTS)
			if (!ed->priv.server->skeleton.relativetransforms)
				ed->priv.server->skeleton.relativetransforms = (matrix4x4_t *)Mem_Alloc(prog->progs_mempool, ed->priv.server->skeleton.model->num_bones * sizeof(matrix4x4_t));
			memcpy(ed->priv.server->skeleton.relativetransforms, skeleton->relativetransforms, ed->priv.server->skeleton.model->num_bones * sizeof(matrix4x4_t));
		}
		else
		{
			if(ed->priv.server->skeleton.relativetransforms)
				Mem_Free(ed->priv.server->skeleton.relativetransforms);
			ed->priv.server->skeleton.relativetransforms = NULL;
		}
	}
}

void VM_RemoveEdictSkeleton(prvm_prog_t *prog, prvm_edict_t *ed)
{
	if (ed->priv.server->skeleton.relativetransforms)
		Mem_Free(ed->priv.server->skeleton.relativetransforms);
	memset(&ed->priv.server->skeleton, 0, sizeof(ed->priv.server->skeleton));
}




//============================================================================
//BUILT-IN FUNCTIONS

#ifdef WIN32
	// memccpy() is standard in POSIX.1-2001, POSIX.1-2008, SVr4, 4.3BSD, C23.
	// Microsoft supports it, but apparently complains if we use it.
	#undef memccpy
	#define memccpy _memccpy
#endif
size_t VM_VarString(prvm_prog_t *prog, int first, char *out, size_t outsize)
{
	int i;
	const char *s;
	char *p;
	char *outend = out + outsize - 1;

	// bones_was_here: && out < outend improves perf significantly in some tests that don't trigger the warning,
	// which seems odd, surely it would only help when the warning is printed?
	for (i = first;i < prog->argc && out < outend;i++)
	{
		s = PRVM_G_STRING((OFS_PARM0+i*3));
		if (*s)
		{
			// like dp_stpecpy but with a VM_Warning for use with `prvm_backtraceforwarnings 1`
			p = (char *)memccpy(out, s, '\0', (outend + 1) - out);
			if (p)
				out = p - 1;
			else
			{
				VM_Warning(prog, "%lu of %lu bytes available, will truncate %lu byte string \"%s\"\n", (unsigned long)(outend - out), (unsigned long)outsize - 1, (unsigned long)strlen(s), s);
				out = outend;
				*out = '\0';
			}
		}
		else
			*out = '\0';
	}

	return outsize - ((outend + 1) - out);
}

/*
=================
VM_checkextension

returns true if the extension is supported by the server

checkextension(extensionname)
=================
*/

// kind of helper function
static qbool checkextension(prvm_prog_t *prog, const char *name)
{
	const char **e;

	for (e = prog->extensionstring;*e;e++)
	{
		if(!strcasecmp(*e, name))
		{
#ifdef USEODE
			// special sheck for ODE
			if (!strncasecmp("DP_PHYSICS_ODE", name, 14))
			{
#ifndef LINK_TO_LIBODE
				return ode_dll ? true : false;
#else
#ifdef LINK_TO_LIBODE
				return true;
#else
				return false;
#endif
#endif
			}
#endif

			// special sheck for d0_blind_id
			if (!strcasecmp("DP_CRYPTO", name))
				return Crypto_Available();
			if (!strcasecmp("DP_QC_DIGEST_SHA256", name))
				return Crypto_Available();

			// special shreck for libcurl
			if (!strcasecmp("DP_QC_URI_GET", name) || !strcasecmp("DP_QC_URI_POST", name))
				return Curl_Available();

			return true;
		}
	}
	return false;
}

void VM_checkextension(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_checkextension);

	PRVM_G_FLOAT(OFS_RETURN) = checkextension(prog, PRVM_G_STRING(OFS_PARM0));
}

/*
=================
VM_error

This is a TERMINAL error, which will kill off the entire prog.
Dumps self.

error(value)
=================
*/
void VM_error(prvm_prog_t *prog)
{
	prvm_edict_t	*ed;
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_VarString(prog, 0, string, sizeof(string));
	Con_Printf(CON_ERROR "======%s ERROR in %s:\n%s\n", prog->name, PRVM_GetString(prog, prog->xfunction->s_name), string);
	ed = PRVM_PROG_TO_EDICT(PRVM_allglobaledict(self));
	PRVM_ED_Print(prog, ed, NULL);

	prog->error_cmd("%s: Program error in function %s:\n%s\nTip: read above for entity information\n", prog->name, PRVM_GetString(prog, prog->xfunction->s_name), string);
}

/*
=================
VM_objerror

Dumps out self, then an error message.  The program is aborted and self is
removed, but the level can continue.

objerror(value)
=================
*/
void VM_objerror(prvm_prog_t *prog)
{
	prvm_edict_t	*ed;
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_VarString(prog, 0, string, sizeof(string));
	Con_Printf(CON_ERROR "======OBJECT ERROR======\n"); // , prog->name, PRVM_GetString(prog->xfunction->s_name), string); // or include them? FIXME
	ed = PRVM_PROG_TO_EDICT(PRVM_allglobaledict(self));
	PRVM_ED_Print(prog, ed, NULL);
	PRVM_ED_Free (prog, ed);
	Con_Printf(CON_ERROR "%s OBJECT ERROR in %s:\n%s\nTip: read above for entity information\n", prog->name, PRVM_GetString(prog, prog->xfunction->s_name), string);
}

/*
=================
VM_print

print to console

print(...[string])
=================
*/
void VM_print(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_VarString(prog, 0, string, sizeof(string));
	Con_Print(string);
}

/*
=================
VM_bprint

broadcast print to everyone on server

bprint(...[string])
=================
*/
void VM_bprint(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];

	if(!sv.active)
	{
		VM_Warning(prog, "VM_bprint: server is not active!\n");
		return;
	}

	VM_VarString(prog, 0, string, sizeof(string));
	SV_BroadcastPrint(string);
}

/*
=================
VM_sprint (menu & client but only if server.active == true)

single print to a specific client

sprint(float clientnum,...[string])
=================
*/
void VM_sprint(prvm_prog_t *prog)
{
	client_t	*client;
	int			clientnum;
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_sprint);

	//find client for this entity
	clientnum = (int)PRVM_G_FLOAT(OFS_PARM0);
	if (!sv.active  || clientnum < 0 || clientnum >= svs.maxclients || !svs.clients[clientnum].active)
	{
		VM_Warning(prog, "VM_sprint: invalid client or server is not active!\n");
		return;
	}

	client = svs.clients + clientnum;
	if (!client->netconnection)
		return;

	VM_VarString(prog, 1, string, sizeof(string));
	MSG_WriteChar(&client->netconnection->message,svc_print);
	MSG_WriteString(&client->netconnection->message, string);
}

/*
=================
VM_centerprint

single print to the screen

centerprint(value)
=================
*/
void VM_centerprint(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_centerprint);
	VM_VarString(prog, 0, string, sizeof(string));
	SCR_CenterPrint(string);
}

/*
=================
VM_normalize

vector normalize(vector)
=================
*/
void VM_normalize(prvm_prog_t *prog)
{
	prvm_vec_t	*value1;
	vec3_t	newvalue;
	double	f;

	VM_SAFEPARMCOUNT(1,VM_normalize);

	value1 = PRVM_G_VECTOR(OFS_PARM0);

	f = VectorLength2(value1);
	if (f)
	{
		f = 1.0 / sqrt(f);
		VectorScale(value1, f, newvalue);
	}
	else
		VectorClear(newvalue);

	VectorCopy (newvalue, PRVM_G_VECTOR(OFS_RETURN));
}

/*
=================
VM_vlen

scalar vlen(vector)
=================
*/
void VM_vlen(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_vlen);
	PRVM_G_FLOAT(OFS_RETURN) = VectorLength(PRVM_G_VECTOR(OFS_PARM0));
}

/*
=================
VM_vectoyaw

float vectoyaw(vector)
=================
*/
void VM_vectoyaw(prvm_prog_t *prog)
{
	prvm_vec_t	*value1;
	prvm_vec_t	yaw;

	VM_SAFEPARMCOUNT(1,VM_vectoyaw);

	value1 = PRVM_G_VECTOR(OFS_PARM0);

	if (value1[1] == 0 && value1[0] == 0)
		yaw = 0;
	else
	{
		yaw = (int) (atan2(value1[1], value1[0]) * 180 / M_PI);
		if (yaw < 0)
			yaw += 360;
	}

	PRVM_G_FLOAT(OFS_RETURN) = yaw;
}


/*
=================
VM_vectoangles

vector vectoangles(vector[, vector])
=================
*/
void VM_vectoangles(prvm_prog_t *prog)
{
	vec3_t result, forward, up;
	VM_SAFEPARMCOUNTRANGE(1, 2,VM_vectoangles);

	VectorCopy(PRVM_G_VECTOR(OFS_PARM0), forward);
	if (prog->argc >= 2)
	{
		VectorCopy(PRVM_G_VECTOR(OFS_PARM1), up);
		AnglesFromVectors(result, forward, up, true);
	}
	else
		AnglesFromVectors(result, forward, NULL, true);
	VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
}

/*
=================
VM_random

Returns a random number > 0 and < 1

float random()
=================
*/
void VM_random(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_random);

	PRVM_G_FLOAT(OFS_RETURN) = lhrandom(0, 1);
}

/*
=========
VM_localsound

localsound(string sample, float chan, float vol)
=========
*/
void VM_localsound(prvm_prog_t *prog)
{
	const char *s;
	float chan, vol;

	VM_SAFEPARMCOUNTRANGE(1, 3,VM_localsound);

	s = PRVM_G_STRING(OFS_PARM0);
	if(prog->argc == 3)
	{
		chan = PRVM_G_FLOAT(OFS_PARM1);
		vol = PRVM_G_FLOAT(OFS_PARM2) == 0 ? 1 : PRVM_G_FLOAT(OFS_PARM2);
		if(!S_LocalSoundEx(s, chan, vol))
		{
			PRVM_G_FLOAT(OFS_RETURN) = -4;
			VM_Warning(prog, "VM_localsound: Failed to play %s !\n", s);
			return;
		}
	}
	else if(!S_LocalSound (s))
	{
		PRVM_G_FLOAT(OFS_RETURN) = -4;
		VM_Warning(prog, "VM_localsound: Failed to play %s !\n", s);
		return;
	}

	PRVM_G_FLOAT(OFS_RETURN) = 1;
}

/*
=================
VM_break

break()
=================
*/
void VM_break(prvm_prog_t *prog)
{
	prog->error_cmd("%s: break statement", prog->name);
}

//============================================================================

/*
=================
VM_localcmd

Appends text to the command buffer

[localcmd (string, ...) or]
cmd (string, ...)
=================
*/
void VM_localcmd(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];
	VM_SAFEPARMCOUNTRANGE(1, 8, VM_localcmd);
	VM_VarString(prog, 0, string, sizeof(string));
	Cbuf_AddText(cmd_local, string);
}

static qbool PRVM_Cvar_ReadOk(prvm_prog_t *prog, const char *string)
{
	cvar_t *cvar;
	cvar = Cvar_FindVar(prog->console_cmd->cvars, string, prog->console_cmd->cvars_flagsmask);
	return ((cvar) && ((cvar->flags & CF_PRIVATE) == 0));
}

/*
=================
VM_cvar

float cvar (string)
=================
*/
void VM_cvar(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];
	VM_SAFEPARMCOUNTRANGE(1,8,VM_cvar);
	VM_VarString(prog, 0, string, sizeof(string));
	VM_CheckEmptyString(prog, string);
	PRVM_G_FLOAT(OFS_RETURN) = PRVM_Cvar_ReadOk(prog, string) ? Cvar_VariableValue(prog->console_cmd->cvars, string, prog->console_cmd->cvars_flagsmask) : 0;
}

/*
=================
VM_cvar

float cvar_type (string)
float CVAR_TYPEFLAG_EXISTS = 1;
float CVAR_TYPEFLAG_SAVED = 2;
float CVAR_TYPEFLAG_PRIVATE = 4;
float CVAR_TYPEFLAG_ENGINE = 8;
float CVAR_TYPEFLAG_HASDESCRIPTION = 16;
float CVAR_TYPEFLAG_READONLY = 32;
=================
*/
void VM_cvar_type(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];
	cvar_t *cvar;
	int ret;

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_cvar_type);
	VM_VarString(prog, 0, string, sizeof(string));
	VM_CheckEmptyString(prog, string);
	cvar = Cvar_FindVar(prog->console_cmd->cvars, string, prog->console_cmd->cvars_flagsmask);


	if(!cvar)
	{
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return; // CVAR_TYPE_NONE
	}

	ret = 1; // CVAR_EXISTS
	if(cvar->flags & CF_ARCHIVE)
		ret |= 2; // CVAR_TYPE_SAVED
	if(cvar->flags & CF_PRIVATE)
		ret |= 4; // CVAR_TYPE_PRIVATE
	if(!(cvar->flags & CF_ALLOCATED))
		ret |= 8; // CVAR_TYPE_ENGINE
	if(cvar->description != cvar_dummy_description)
		ret |= 16; // CVAR_TYPE_HASDESCRIPTION
	if(cvar->flags & CF_READONLY)
		ret |= 32; // CVAR_TYPE_READONLY
	
	PRVM_G_FLOAT(OFS_RETURN) = ret;
}

/*
=================
VM_cvar_string

const string	VM_cvar_string (string, ...)
=================
*/
void VM_cvar_string(prvm_prog_t *prog)
{
	char cvar_name[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNTRANGE(1,8,VM_cvar_string);
	VM_VarString(prog, 0, cvar_name, sizeof(cvar_name));
	VM_CheckEmptyString(prog, cvar_name);
	if (PRVM_Cvar_ReadOk(prog, cvar_name))
	{
		const char *cvar_string = Cvar_VariableString(prog->console_cmd->cvars, cvar_name, prog->console_cmd->cvars_flagsmask);
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, cvar_string, strlen(cvar_string));
	}
	else
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
}


/*
========================
VM_cvar_defstring

const string	VM_cvar_defstring (string, ...)
========================
*/
void VM_cvar_defstring(prvm_prog_t *prog)
{
	char cvar_name[VM_TEMPSTRING_MAXSIZE];
	const char *cvar_defstring;

	VM_SAFEPARMCOUNTRANGE(1,8,VM_cvar_defstring);
	VM_VarString(prog, 0, cvar_name, sizeof(cvar_name));
	VM_CheckEmptyString(prog, cvar_name);
	cvar_defstring = Cvar_VariableDefString(prog->console_cmd->cvars, cvar_name, prog->console_cmd->cvars_flagsmask);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, cvar_defstring, strlen(cvar_defstring));
}

/*
========================
VM_cvar_defstring

const string	VM_cvar_description (string, ...)
========================
*/
void VM_cvar_description(prvm_prog_t *prog)
{
	char cvar_name[VM_TEMPSTRING_MAXSIZE];
	const char *cvar_desc;

	VM_SAFEPARMCOUNTRANGE(1,8,VM_cvar_description);
	VM_VarString(prog, 0, cvar_name, sizeof(cvar_name));
	VM_CheckEmptyString(prog, cvar_name);
	cvar_desc = Cvar_VariableDescription(prog->console_cmd->cvars, cvar_name, prog->console_cmd->cvars_flagsmask);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, cvar_desc, strlen(cvar_desc));
}
/*
=================
VM_cvar_set

void cvar_set (string,string, ...)
=================
*/
void VM_cvar_set(prvm_prog_t *prog)
{
	const char *name;
	char value[VM_TEMPSTRING_MAXSIZE];
	cvar_t *cvar;

	VM_SAFEPARMCOUNTRANGE(2,8,VM_cvar_set);
	name = PRVM_G_STRING(OFS_PARM0);
	VM_CheckEmptyString(prog, name);
	cvar = Cvar_FindVar(prog->console_cmd->cvars, name, prog->console_cmd->cvars_flagsmask);
	if (!cvar)
	{
		VM_Warning(prog, "VM_cvar_set: variable %s not found\n", name);
		return;
	}
	if (cvar->flags & CF_READONLY)
	{
		VM_Warning(prog, "VM_cvar_set: variable %s is read-only\n", cvar->name);
		return;
	}
	VM_VarString(prog, 1, value, sizeof(value));
	Cvar_SetQuick(cvar, value);
}

/*
=========
VM_dprint

dprint(...[string])
=========
*/
void VM_dprint(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];
	VM_SAFEPARMCOUNTRANGE(1, 8, VM_dprint);
	VM_VarString(prog, 0, string, sizeof(string));
#if 1
	Con_DPrintf("%s", string);
#else
	Con_DPrintf("%s: %s", prog->name, string);
#endif
}

/*
=========
VM_ftos

string	ftos(float)
=========
*/

void VM_ftos(prvm_prog_t *prog)
{
	prvm_vec_t v;
	char s[128];
	size_t slen;

	VM_SAFEPARMCOUNT(1, VM_ftos);

	v = PRVM_G_FLOAT(OFS_PARM0);

	if ((prvm_vec_t)((prvm_int_t)v) == v)
		slen = dpsnprintf(s, sizeof(s), "%.0f", v);
	else
		slen = dpsnprintf(s, sizeof(s), "%f", v);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, s, slen);
}

/*
=========
VM_fabs

float	fabs(float)
=========
*/

void VM_fabs(prvm_prog_t *prog)
{
	prvm_vec_t v;

	VM_SAFEPARMCOUNT(1,VM_fabs);

	v = PRVM_G_FLOAT(OFS_PARM0);
	PRVM_G_FLOAT(OFS_RETURN) = fabs(v);
}

/*
=========
VM_vtos

string	vtos(vector)
=========
*/

void VM_vtos(prvm_prog_t *prog)
{
	char s[512];
	size_t slen;

	VM_SAFEPARMCOUNT(1,VM_vtos);

	slen = dpsnprintf(s, sizeof(s), "'%5.1f %5.1f %5.1f'", PRVM_G_VECTOR(OFS_PARM0)[0], PRVM_G_VECTOR(OFS_PARM0)[1], PRVM_G_VECTOR(OFS_PARM0)[2]);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, s, slen);
}

/*
=========
VM_etos

string	etos(entity)
=========
*/

void VM_etos(prvm_prog_t *prog)
{
	char s[128];
	size_t slen;

	VM_SAFEPARMCOUNT(1, VM_etos);

	slen = dpsnprintf(s, sizeof(s), "entity %i", PRVM_G_EDICTNUM(OFS_PARM0));
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, s, slen);
}

/*
=========
VM_stof

float stof(...[string])
=========
*/
void VM_stof(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];
	VM_SAFEPARMCOUNTRANGE(1, 8, VM_stof);
	VM_VarString(prog, 0, string, sizeof(string));
	PRVM_G_FLOAT(OFS_RETURN) = atof(string);
}

/*
========================
VM_itof

float itof(int ent)
========================
*/
void VM_itof(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1, VM_itof);
	PRVM_G_FLOAT(OFS_RETURN) = PRVM_G_INT(OFS_PARM0);
}

/*
========================
VM_ftoe

entity ftoe(float num)
========================
*/
void VM_ftoe(prvm_prog_t *prog)
{
	prvm_int_t ent;
	VM_SAFEPARMCOUNT(1, VM_ftoe);

	ent = (prvm_int_t)PRVM_G_FLOAT(OFS_PARM0);
	if (ent < 0 || ent >= prog->max_edicts || PRVM_PROG_TO_EDICT(ent)->free)
		ent = 0; // return world instead of a free or invalid entity

	PRVM_G_INT(OFS_RETURN) = ent;
}

/*
========================
VM_etof

float etof(entity ent)
========================
*/
void VM_etof(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1, VM_etof);
	PRVM_G_FLOAT(OFS_RETURN) = PRVM_G_EDICTNUM(OFS_PARM0);
}

/*
=========
VM_strftime

string strftime(float uselocaltime, string[, string ...])
=========
*/
void VM_strftime(prvm_prog_t *prog)
{
	time_t t;
#if _MSC_VER >= 1400
	struct tm tm;
	int tmresult;
#else
	struct tm *tm;
#endif
	char fmt[VM_TEMPSTRING_MAXSIZE];
	char result[VM_TEMPSTRING_MAXSIZE];
	size_t result_len;

	VM_SAFEPARMCOUNTRANGE(2, 8, VM_strftime);
	VM_VarString(prog, 1, fmt, sizeof(fmt));
	t = time(NULL);
#if _MSC_VER >= 1400
	if (PRVM_G_FLOAT(OFS_PARM0))
		tmresult = localtime_s(&tm, &t);
	else
		tmresult = gmtime_s(&tm, &t);
	if (!tmresult)
#else
	if (PRVM_G_FLOAT(OFS_PARM0))
		tm = localtime(&t);
	else
		tm = gmtime(&t);
	if (!tm)
#endif
	{
		PRVM_G_INT(OFS_RETURN) = 0;
		return;
	}
#if _MSC_VER >= 1400
	result_len = strftime(result, sizeof(result), fmt, &tm);
#else
	result_len = strftime(result, sizeof(result), fmt, tm);
#endif
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, result, result_len);
}

/*
=========
VM_spawn

entity spawn()
=========
*/

void VM_spawn(prvm_prog_t *prog)
{
	prvm_edict_t	*ed;
	VM_SAFEPARMCOUNT(0, VM_spawn);
	prog->xfunction->builtinsprofile += 20;
	ed = PRVM_ED_Alloc(prog);
	VM_RETURN_EDICT(ed);
}

/*
=========
VM_remove

remove(entity e)
=========
*/

void VM_remove(prvm_prog_t *prog)
{
	prvm_edict_t	*ed;
	prog->xfunction->builtinsprofile += 20;

	VM_SAFEPARMCOUNT(1, VM_remove);

	ed = PRVM_G_EDICT(OFS_PARM0);
	if( PRVM_NUM_FOR_EDICT(ed) <= prog->reserved_edicts )
	{
		if (developer.integer > 0)
			VM_Warning(prog, "VM_remove: tried to remove the null entity or a reserved entity!\n" );
	}
	else if( ed->free )
	{
		if (developer.integer > 0)
			VM_Warning(prog, "VM_remove: tried to remove an already freed entity!\n" );
	}
	else
		PRVM_ED_Free (prog, ed);
}

/*
=========
VM_find

entity	find(entity start, .string field, string match)
=========
*/

void VM_find(prvm_prog_t *prog)
{
	int		e;
	int		f;
	const char	*s, *t;
	prvm_edict_t	*ed;

	VM_SAFEPARMCOUNT(3,VM_find);

	e = PRVM_G_EDICTNUM(OFS_PARM0);
	f = PRVM_G_INT(OFS_PARM1);
	s = PRVM_G_STRING(OFS_PARM2);

	// LadyHavoc: apparently BloodMage does a find(world, weaponmodel, "") and
	// expects it to find all the monsters, so we must be careful to support
	// searching for ""

	for (e++ ; e < prog->num_edicts ; e++)
	{
		prog->xfunction->builtinsprofile++;
		ed = PRVM_EDICT_NUM(e);
		if (ed->free)
			continue;
		t = PRVM_E_STRING(ed,f);
		if (!t)
			t = "";
		if (!strcmp(t,s))
		{
			VM_RETURN_EDICT(ed);
			return;
		}
	}

	VM_RETURN_EDICT(prog->edicts);
}

/*
=========
VM_findfloat

  entity	findfloat(entity start, .float field, float match)
  entity	findentity(entity start, .entity field, entity match)
=========
*/
// LadyHavoc: added this for searching float, int, and entity reference fields
void VM_findfloat(prvm_prog_t *prog)
{
	int		e;
	int		f;
	prvm_vec_t	s;
	prvm_edict_t	*ed;

	VM_SAFEPARMCOUNT(3,VM_findfloat);

	e = PRVM_G_EDICTNUM(OFS_PARM0);
	f = PRVM_G_INT(OFS_PARM1);
	s = PRVM_G_FLOAT(OFS_PARM2);

	for (e++ ; e < prog->num_edicts ; e++)
	{
		prog->xfunction->builtinsprofile++;
		ed = PRVM_EDICT_NUM(e);
		if (ed->free)
			continue;
		if (PRVM_E_FLOAT(ed,f) == s)
		{
			VM_RETURN_EDICT(ed);
			return;
		}
	}

	VM_RETURN_EDICT(prog->edicts);
}

/*
=========
VM_findchain

entity	findchain(.string field, string match)
=========
*/
// chained search for strings in entity fields
// entity(.string field, string match) findchain = #402;
void VM_findchain(prvm_prog_t *prog)
{
	int		i;
	int		f;
	const char	*s, *t;
	prvm_edict_t	*ent, *chain;
	int chainfield;

	VM_SAFEPARMCOUNTRANGE(2,3,VM_findchain);

	if(prog->argc == 3)
		chainfield = PRVM_G_INT(OFS_PARM2);
	else
		chainfield = prog->fieldoffsets.chain;
	if (chainfield < 0)
		prog->error_cmd("VM_findchain: %s doesnt have the specified chain field !", prog->name);

	chain = prog->edicts;

	f = PRVM_G_INT(OFS_PARM0);
	s = PRVM_G_STRING(OFS_PARM1);

	// LadyHavoc: apparently BloodMage does a find(world, weaponmodel, "") and
	// expects it to find all the monsters, so we must be careful to support
	// searching for ""

	ent = PRVM_NEXT_EDICT(prog->edicts);
	for (i = 1;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
	{
		prog->xfunction->builtinsprofile++;
		if (ent->free)
			continue;
		t = PRVM_E_STRING(ent,f);
		if (!t)
			t = "";
		if (strcmp(t,s))
			continue;

		PRVM_EDICTFIELDEDICT(ent,chainfield) = PRVM_NUM_FOR_EDICT(chain);
		chain = ent;
	}

	VM_RETURN_EDICT(chain);
}

/*
=========
VM_findchainfloat

entity	findchainfloat(.string field, float match)
entity	findchainentity(.string field, entity match)
=========
*/
// LadyHavoc: chained search for float, int, and entity reference fields
// entity(.string field, float match) findchainfloat = #403;
void VM_findchainfloat(prvm_prog_t *prog)
{
	int		i;
	int		f;
	prvm_vec_t	s;
	prvm_edict_t	*ent, *chain;
	int chainfield;

	VM_SAFEPARMCOUNTRANGE(2, 3, VM_findchainfloat);

	if(prog->argc == 3)
		chainfield = PRVM_G_INT(OFS_PARM2);
	else
		chainfield = prog->fieldoffsets.chain;
	if (chainfield < 0)
		prog->error_cmd("VM_findchainfloat: %s doesnt have the specified chain field !", prog->name);

	chain = (prvm_edict_t *)prog->edicts;

	f = PRVM_G_INT(OFS_PARM0);
	s = PRVM_G_FLOAT(OFS_PARM1);

	ent = PRVM_NEXT_EDICT(prog->edicts);
	for (i = 1;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
	{
		prog->xfunction->builtinsprofile++;
		if (ent->free)
			continue;
		if (PRVM_E_FLOAT(ent,f) != s)
			continue;

		PRVM_EDICTFIELDEDICT(ent,chainfield) = PRVM_EDICT_TO_PROG(chain);
		chain = ent;
	}

	VM_RETURN_EDICT(chain);
}

/*
========================
VM_findflags

entity	findflags(entity start, .float field, float match)
========================
*/
// LadyHavoc: search for flags in float fields
void VM_findflags(prvm_prog_t *prog)
{
	prvm_int_t	e;
	prvm_int_t	f;
	prvm_int_t	s;
	prvm_edict_t	*ed;

	VM_SAFEPARMCOUNT(3, VM_findflags);


	e = PRVM_G_EDICTNUM(OFS_PARM0);
	f = PRVM_G_INT(OFS_PARM1);
	s = (prvm_int_t)PRVM_G_FLOAT(OFS_PARM2);

	for (e++ ; e < prog->num_edicts ; e++)
	{
		prog->xfunction->builtinsprofile++;
		ed = PRVM_EDICT_NUM(e);
		if (ed->free)
			continue;
		if (!PRVM_E_FLOAT(ed,f))
			continue;
		if ((prvm_int_t)PRVM_E_FLOAT(ed,f) & s)
		{
			VM_RETURN_EDICT(ed);
			return;
		}
	}

	VM_RETURN_EDICT(prog->edicts);
}

/*
========================
VM_findchainflags

entity	findchainflags(.float field, float match)
========================
*/
// LadyHavoc: chained search for flags in float fields
void VM_findchainflags(prvm_prog_t *prog)
{
	prvm_int_t		i;
	prvm_int_t		f;
	prvm_int_t		s;
	prvm_edict_t	*ent, *chain;
	int chainfield;

	VM_SAFEPARMCOUNTRANGE(2, 3, VM_findchainflags);

	if(prog->argc == 3)
		chainfield = PRVM_G_INT(OFS_PARM2);
	else
		chainfield = prog->fieldoffsets.chain;
	if (chainfield < 0)
		prog->error_cmd("VM_findchainflags: %s doesnt have the specified chain field !", prog->name);

	chain = (prvm_edict_t *)prog->edicts;

	f = PRVM_G_INT(OFS_PARM0);
	s = (prvm_int_t)PRVM_G_FLOAT(OFS_PARM1);

	ent = PRVM_NEXT_EDICT(prog->edicts);
	for (i = 1;i < prog->num_edicts;i++, ent = PRVM_NEXT_EDICT(ent))
	{
		prog->xfunction->builtinsprofile++;
		if (ent->free)
			continue;
		if (!PRVM_E_FLOAT(ent,f))
			continue;
		if (!((prvm_int_t)PRVM_E_FLOAT(ent,f) & s))
			continue;

		PRVM_EDICTFIELDEDICT(ent,chainfield) = PRVM_EDICT_TO_PROG(chain);
		chain = ent;
	}

	VM_RETURN_EDICT(chain);
}

/*
=========
VM_precache_sound

string	precache_sound (string sample)
=========
*/
void VM_precache_sound(prvm_prog_t *prog)
{
	const char *s;

	VM_SAFEPARMCOUNT(1, VM_precache_sound);

	s = PRVM_G_STRING(OFS_PARM0);
	PRVM_G_INT(OFS_RETURN) = PRVM_G_INT(OFS_PARM0);
	//VM_CheckEmptyString(prog, s);

	if(snd_initialized.integer && !S_PrecacheSound(s, true, true))
	{
		VM_Warning(prog, "VM_precache_sound: Failed to load %s !\n", s);
		return;
	}
}

/*
=================
VM_precache_file

returns the same string as output

does nothing, only used by qcc to build .pak archives
=================
*/
void VM_precache_file(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_precache_file);
	// precache_file is only used to copy files with qcc, it does nothing
	PRVM_G_INT(OFS_RETURN) = PRVM_G_INT(OFS_PARM0);
}

/*
=========
VM_coredump

coredump()
=========
*/
void VM_coredump(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_coredump);

	Cbuf_AddText(cmd_local, "prvm_edicts ");
	Cbuf_AddText(cmd_local, prog->name);
	Cbuf_AddText(cmd_local, "\n");
}

/*
=========
VM_stackdump

stackdump()
=========
*/
void VM_stackdump(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0, VM_stackdump);

	PRVM_StackTrace(prog);
}

/*
=========
VM_crash

crash()
=========
*/

void VM_crash(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0, VM_crash);

	prog->error_cmd("Crash called by %s",prog->name);
}

/*
=========
VM_traceon

traceon()
=========
*/
void VM_traceon(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_traceon);

	prog->trace = true;
}

/*
=========
VM_traceoff

traceoff()
=========
*/
void VM_traceoff(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_traceoff);

	prog->trace = false;
}

/*
=========
VM_eprint

eprint(entity e)
=========
*/
void VM_eprint(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_eprint);

	PRVM_ED_PrintNum (prog, PRVM_G_EDICTNUM(OFS_PARM0), NULL);
}

/*
=========
VM_rint

float	rint(float)
=========
*/
void VM_rint(prvm_prog_t *prog)
{
	prvm_vec_t f;
	VM_SAFEPARMCOUNT(1,VM_rint);

	f = PRVM_G_FLOAT(OFS_PARM0);

	if (prvm_gameplayfix_rintisround.integer)
	{
		// Guarantee that integers (including negative zeroes) and
		// infinities remain as is. This also guarantees the following
		// code doesn't run for zeroes.
		if (f == floor(f))
			PRVM_G_FLOAT(OFS_RETURN) = f;
		// The copysign ensures that output negative zeroes always have
		// the same sign as the input. This likely is already the case
		// anyway, but I honestly can't find anywhere in the C
		// standards which kind of zero floor(0.8) and ceil(-0.8) are
		// supposed to be.
		else if (f > 0)
			PRVM_G_FLOAT(OFS_RETURN) = copysign(floor(f + 0.5), f);
		else
			PRVM_G_FLOAT(OFS_RETURN) = copysign(ceil(f - 0.5), f);
		// NOTE: Technically rint() when rounding to nearest should
		// round towards even. Leaving things as is for now, though, as
		// it matches Quake.
	}
	else
	{
		// Known broken implementation of Quake, except with well
		// defined overflow behavior.
		if (f >= 2147483647.5 || f <= -2147483648.5)
		{
			// Intel 8087 and SSE2 overflow behavior.
			PRVM_G_FLOAT(OFS_RETURN) = -2147483648.0;
		}
		else
		{
			// Original code from Quake.
			//
			// Uses cast to int, and thus truncates and never
			// produces negative zeroes.
			if (f > 0)
				PRVM_G_FLOAT(OFS_RETURN) = (int)(f + 0.5);
			else
				PRVM_G_FLOAT(OFS_RETURN) = (int)(f - 0.5);
		}
	}
}

/*
=========
VM_floor

float	floor(float)
=========
*/
void VM_floor(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_floor);

	PRVM_G_FLOAT(OFS_RETURN) = floor(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_ceil

float	ceil(float)
=========
*/
void VM_ceil(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_ceil);

	PRVM_G_FLOAT(OFS_RETURN) = ceil(PRVM_G_FLOAT(OFS_PARM0));
}


/*
=============
VM_nextent

entity	nextent(entity)
=============
*/
void VM_nextent(prvm_prog_t *prog)
{
	int		i;
	prvm_edict_t	*ent;

	VM_SAFEPARMCOUNT(1, VM_nextent);

	i = PRVM_G_EDICTNUM(OFS_PARM0);
	while (1)
	{
		prog->xfunction->builtinsprofile++;
		i++;
		if (i == prog->num_edicts)
		{
			VM_RETURN_EDICT(prog->edicts);
			return;
		}
		ent = PRVM_EDICT_NUM(i);
		if (!ent->free)
		{
			VM_RETURN_EDICT(ent);
			return;
		}
	}
}

//=============================================================================

/*
==============
VM_changelevel
server and menu

changelevel(string map)
==============
*/
void VM_changelevel(prvm_prog_t *prog)
{
	char vabuf[1024];
	VM_SAFEPARMCOUNT(1, VM_changelevel);

	if(!sv.active)
	{
		VM_Warning(prog, "VM_changelevel: server is not active!\n");
		return;
	}

// make sure we don't issue two changelevels
	if (svs.changelevel_issued)
		return;
	svs.changelevel_issued = true;

	Cbuf_AddText(cmd_local, va(vabuf, sizeof(vabuf), "changelevel %s\n", PRVM_G_STRING(OFS_PARM0)));
}

/*
=========
VM_sin

float	sin(float)
=========
*/
void VM_sin(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_sin);
	PRVM_G_FLOAT(OFS_RETURN) = sin(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_cos
float	cos(float)
=========
*/
void VM_cos(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_cos);
	PRVM_G_FLOAT(OFS_RETURN) = cos(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_sqrt

float	sqrt(float)
=========
*/
void VM_sqrt(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_sqrt);
	PRVM_G_FLOAT(OFS_RETURN) = sqrt(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_asin

float	asin(float)
=========
*/
void VM_asin(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_asin);
	PRVM_G_FLOAT(OFS_RETURN) = asin(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_acos
float	acos(float)
=========
*/
void VM_acos(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_acos);
	PRVM_G_FLOAT(OFS_RETURN) = acos(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_atan
float	atan(float)
=========
*/
void VM_atan(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_atan);
	PRVM_G_FLOAT(OFS_RETURN) = atan(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=========
VM_atan2
float	atan2(float,float)
=========
*/
void VM_atan2(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(2,VM_atan2);
	PRVM_G_FLOAT(OFS_RETURN) = atan2(PRVM_G_FLOAT(OFS_PARM0), PRVM_G_FLOAT(OFS_PARM1));
}

/*
=========
VM_tan
float	tan(float)
=========
*/
void VM_tan(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_tan);
	PRVM_G_FLOAT(OFS_RETURN) = tan(PRVM_G_FLOAT(OFS_PARM0));
}

/*
=================
VM_randomvec

Returns a vector of length < 1 and > 0

vector randomvec()
=================
*/
void VM_randomvec(prvm_prog_t *prog)
{
	vec3_t temp;
	VM_SAFEPARMCOUNT(0, VM_randomvec);
	VectorRandom(temp);
	VectorCopy(temp, PRVM_G_VECTOR(OFS_RETURN));
}

//=============================================================================

/*
=========
VM_registercvar

float	registercvar (string name, string value[, float flags])
=========
*/
void VM_registercvar(prvm_prog_t *prog)
{
	const char *name, *value;
	unsigned flags;

	VM_SAFEPARMCOUNTRANGE(2, 3, VM_registercvar);

	name = PRVM_G_STRING(OFS_PARM0);
	value = PRVM_G_STRING(OFS_PARM1);
	flags = prog->argc >= 3 ? (int)PRVM_G_FLOAT(OFS_PARM2) : 0;
	PRVM_G_FLOAT(OFS_RETURN) = 0;

	if(flags > CF_MAXFLAGSVAL)
		return;

// first check to see if it has already been defined
	if (Cvar_FindVar (prog->console_cmd->cvars, name, prog->console_cmd->cvars_flagsmask))
		return;

// check for overlap with a command
	if (Cmd_Exists(cmd_local, name))
	{
		VM_Warning(prog, "VM_registercvar: %s is a command\n", name);
		return;
	}

	Cvar_Get(prog->console_cmd->cvars, name, value, prog->console_cmd->cvars_flagsmask | flags, NULL);

	PRVM_G_FLOAT(OFS_RETURN) = 1; // success
}


/*
=================
VM_min

returns the minimum of two supplied floats

float min(float a, float b, ...[float])
=================
*/
void VM_min(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNTRANGE(2, 8, VM_min);
	// LadyHavoc: 3+ argument enhancement suggested by FrikaC
	if (prog->argc >= 3)
	{
		int i;
		float f = PRVM_G_FLOAT(OFS_PARM0);
		for (i = 1;i < prog->argc;i++)
			if (f > PRVM_G_FLOAT((OFS_PARM0+i*3)))
				f = PRVM_G_FLOAT((OFS_PARM0+i*3));
		PRVM_G_FLOAT(OFS_RETURN) = f;
	}
	else
		PRVM_G_FLOAT(OFS_RETURN) = min(PRVM_G_FLOAT(OFS_PARM0), PRVM_G_FLOAT(OFS_PARM1));
}

/*
=================
VM_max

returns the maximum of two supplied floats

float	max(float a, float b, ...[float])
=================
*/
void VM_max(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNTRANGE(2, 8, VM_max);
	// LadyHavoc: 3+ argument enhancement suggested by FrikaC
	if (prog->argc >= 3)
	{
		int i;
		float f = PRVM_G_FLOAT(OFS_PARM0);
		for (i = 1;i < prog->argc;i++)
			if (f < PRVM_G_FLOAT((OFS_PARM0+i*3)))
				f = PRVM_G_FLOAT((OFS_PARM0+i*3));
		PRVM_G_FLOAT(OFS_RETURN) = f;
	}
	else
		PRVM_G_FLOAT(OFS_RETURN) = max(PRVM_G_FLOAT(OFS_PARM0), PRVM_G_FLOAT(OFS_PARM1));
}

/*
=================
VM_bound

returns number bounded by supplied range

float	bound(float min, float value, float max)
=================
*/
void VM_bound(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(3,VM_bound);
	PRVM_G_FLOAT(OFS_RETURN) = bound(PRVM_G_FLOAT(OFS_PARM0), PRVM_G_FLOAT(OFS_PARM1), PRVM_G_FLOAT(OFS_PARM2));
}

/*
=================
VM_pow

returns a raised to power b

float	pow(float a, float b)
=================
*/
void VM_pow(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(2,VM_pow);
	PRVM_G_FLOAT(OFS_RETURN) = pow(PRVM_G_FLOAT(OFS_PARM0), PRVM_G_FLOAT(OFS_PARM1));
}

void VM_log(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_log);
	PRVM_G_FLOAT(OFS_RETURN) = log(PRVM_G_FLOAT(OFS_PARM0));
}

void VM_Files_Init(prvm_prog_t *prog)
{
	int i;
	for (i = 0;i < PRVM_MAX_OPENFILES;i++)
		prog->openfiles[i] = NULL;
}

void VM_Files_CloseAll(prvm_prog_t *prog)
{
	int i;
	for (i = 0;i < PRVM_MAX_OPENFILES;i++)
	{
		if (prog->openfiles[i])
			FS_Close(prog->openfiles[i]);
		prog->openfiles[i] = NULL;
	}
}

static qfile_t *VM_GetFileHandle(prvm_prog_t *prog, int index)
{
	if (index < 0 || index >= PRVM_MAX_OPENFILES)
	{
		Con_Printf("VM_GetFileHandle: invalid file handle %i used in %s\n", index, prog->name);
		return NULL;
	}
	if (prog->openfiles[index] == NULL)
	{
		Con_Printf("VM_GetFileHandle: no such file handle %i (or file has been closed) in %s\n", index, prog->name);
		return NULL;
	}
	return prog->openfiles[index];
}

/*
=========
VM_fopen

float	fopen(string filename, float mode)
=========
*/
// float(string filename, float mode) fopen = #110;
// opens a file inside quake/gamedir/data/ (mode is FILE_READ, FILE_APPEND, or FILE_WRITE),
// returns fhandle >= 0 if successful, or fhandle < 0 if unable to open file for any reason
void VM_fopen(prvm_prog_t *prog)
{
	int filenum, mode;
	const char *modestring, *filename;
	char vabuf[1024];

	VM_SAFEPARMCOUNT(2,VM_fopen);

	for (filenum = 0;filenum < PRVM_MAX_OPENFILES;filenum++)
		if (prog->openfiles[filenum] == NULL)
			break;
	if (filenum >= PRVM_MAX_OPENFILES)
	{
		PRVM_G_FLOAT(OFS_RETURN) = -2;
		VM_Warning(prog, "VM_fopen: ran out of file handles (max %i)\n", PRVM_MAX_OPENFILES);
		return;
	}
	filename = PRVM_G_STRING(OFS_PARM0);
	mode = (int)PRVM_G_FLOAT(OFS_PARM1);
	switch(mode)
	{
	case 0: // FILE_READ
		modestring = "rb";
		prog->openfiles[filenum] = FS_OpenVirtualFile(va(vabuf, sizeof(vabuf), "data/%s", filename), false);
		if (prog->openfiles[filenum] == NULL)
			prog->openfiles[filenum] = FS_OpenVirtualFile(va(vabuf, sizeof(vabuf), "%s", filename), false);
		break;
	case 1: // FILE_APPEND
		modestring = "a";
		prog->openfiles[filenum] = FS_OpenRealFile(va(vabuf, sizeof(vabuf), "data/%s", filename), modestring, false);
		break;
	case 2: // FILE_WRITE
		modestring = "w";
		prog->openfiles[filenum] = FS_OpenRealFile(va(vabuf, sizeof(vabuf), "data/%s", filename), modestring, false);
		break;
	default:
		PRVM_G_FLOAT(OFS_RETURN) = -3;
		VM_Warning(prog, "VM_fopen: no such mode %i (valid: 0 = read, 1 = append, 2 = write)\n", mode);
		return;
	}

	if (prog->openfiles[filenum] == NULL)
	{
		PRVM_G_FLOAT(OFS_RETURN) = -1;
		if (developer_extra.integer)
			VM_Warning(prog, "VM_fopen: %s mode %s failed\n", filename, modestring);
	}
	else
	{
		PRVM_G_FLOAT(OFS_RETURN) = filenum;
		if (developer_extra.integer)
			Con_DPrintf("VM_fopen: %s: %s mode %s opened as #%i\n", prog->name, filename, modestring, filenum);
		prog->openfiles_origin[filenum] = PRVM_AllocationOrigin(prog);
	}
}

/*
=========
VM_fclose

fclose(float fhandle)
=========
*/
//void(float fhandle) fclose = #111; // closes a file
void VM_fclose(prvm_prog_t *prog)
{
	int filenum;

	VM_SAFEPARMCOUNT(1,VM_fclose);

	filenum = (int)PRVM_G_FLOAT(OFS_PARM0);
	if (filenum < 0 || filenum >= PRVM_MAX_OPENFILES)
	{
		VM_Warning(prog, "VM_fclose: invalid file handle %i\n", filenum);
		return;
	}
	if (prog->openfiles[filenum] == NULL)
	{
		VM_Warning(prog, "VM_fclose: no such file handle %i (or file has been closed)\n", filenum);
		return;
	}
	FS_Close(prog->openfiles[filenum]);
	prog->openfiles[filenum] = NULL;
	if(prog->openfiles_origin[filenum])
		PRVM_Free((char *)prog->openfiles_origin[filenum]);
	if (developer_extra.integer)
		Con_DPrintf("VM_fclose: %s: #%i closed\n", prog->name, filenum);
}

/*
=========
VM_fgets

string	fgets(float fhandle)
=========
*/
//string(float fhandle) fgets = #112; // reads a line of text from the file and returns as a tempstring
void VM_fgets(prvm_prog_t *prog)
{
	int c, end;
	char string[VM_TEMPSTRING_MAXSIZE];
	int filenum;

	VM_SAFEPARMCOUNT(1,VM_fgets);

	// set the return value regardless of any possible errors
	PRVM_G_INT(OFS_RETURN) = OFS_NULL;

	filenum = (int)PRVM_G_FLOAT(OFS_PARM0);
	if (filenum < 0 || filenum >= PRVM_MAX_OPENFILES)
	{
		VM_Warning(prog, "VM_fgets: invalid file handle %i\n", filenum);
		return;
	}
	if (prog->openfiles[filenum] == NULL)
	{
		VM_Warning(prog, "VM_fgets: no such file handle %i (or file has been closed)\n", filenum);
		return;
	}
	end = 0;
	for (;;)
	{
		c = FS_Getc(prog->openfiles[filenum]);
		if (c == '\r' || c == '\n' || c < 0)
			break;
		if (end < VM_TEMPSTRING_MAXSIZE - 1)
			string[end++] = c;
	}
	string[end] = '\0';
	// remove \n following \r
	if (c == '\r')
	{
		c = FS_Getc(prog->openfiles[filenum]);
		if (c != '\n')
			FS_UnGetc(prog->openfiles[filenum], (unsigned char)c);
	}
	if (developer_extra.integer)
		Con_DPrintf("fgets: %s: %s\n", prog->name, string);
	if (c >= 0 || end)
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, string, end);
}

/*
=========
VM_fputs

fputs(float fhandle, string s)
=========
*/
//void(float fhandle, string s) fputs = #113; // writes a line of text to the end of the file
void VM_fputs(prvm_prog_t *prog)
{
	size_t stringlength;
	char string[VM_TEMPSTRING_MAXSIZE];
	int filenum;

	VM_SAFEPARMCOUNT(2,VM_fputs);

	filenum = (int)PRVM_G_FLOAT(OFS_PARM0);
	if (filenum < 0 || filenum >= PRVM_MAX_OPENFILES)
	{
		VM_Warning(prog, "VM_fputs: invalid file handle %i\n", filenum);
		return;
	}
	if (prog->openfiles[filenum] == NULL)
	{
		VM_Warning(prog, "VM_fputs: no such file handle %i (or file has been closed)\n", filenum);
		return;
	}
	stringlength = VM_VarString(prog, 1, string, sizeof(string));
	if (stringlength)
		FS_Write(prog->openfiles[filenum], string, stringlength);
	if (developer_extra.integer)
		Con_DPrintf("fputs: %s: %s\n", prog->name, string);
}

/*
=========
VM_writetofile

	writetofile(float fhandle, entity ent)
=========
*/
void VM_writetofile(prvm_prog_t *prog)
{
	prvm_edict_t * ent;
	qfile_t *file;

	VM_SAFEPARMCOUNT(2, VM_writetofile);

	file = VM_GetFileHandle(prog, (int)PRVM_G_FLOAT(OFS_PARM0));
	if( !file )
	{
		VM_Warning(prog, "VM_writetofile: invalid or closed file handle\n");
		return;
	}

	ent = PRVM_G_EDICT(OFS_PARM1);
	if(ent->free)
	{
		VM_Warning(prog, "VM_writetofile: entity %i is free!\n", PRVM_NUM_FOR_EDICT(ent));
		return;
	}

	PRVM_ED_Write (prog, file, ent);
}

// KrimZon - DP_QC_ENTITYDATA
/*
=========
VM_numentityfields

float() numentityfields
Return the number of entity fields - NOT offsets
=========
*/
void VM_numentityfields(prvm_prog_t *prog)
{
	PRVM_G_FLOAT(OFS_RETURN) = prog->numfielddefs;
}

// KrimZon - DP_QC_ENTITYDATA
/*
=========
VM_entityfieldname

string(float fieldnum) entityfieldname
Return name of the specified field as a string, or empty if the field is invalid (warning)
=========
*/
void VM_entityfieldname(prvm_prog_t *prog)
{
	mdef_t *d;
	int i = (int)PRVM_G_FLOAT(OFS_PARM0);

	if (i < 0 || i >= prog->numfielddefs)
	{
		VM_Warning(prog, "VM_entityfieldname: field index out of bounds!\n");
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
		return;
	}

	d = &prog->fielddefs[i];
	PRVM_G_INT(OFS_RETURN) = d->s_name; // presuming that s_name points to a string already
}

// KrimZon - DP_QC_ENTITYDATA
/*
=========
VM_entityfieldtype

float(float fieldnum) entityfieldtype
=========
*/
void VM_entityfieldtype(prvm_prog_t *prog)
{
	mdef_t *d;
	int i = (int)PRVM_G_FLOAT(OFS_PARM0);
	
	if (i < 0 || i >= prog->numfielddefs)
	{
		VM_Warning(prog, "VM_entityfieldtype: field index out of bounds!\n");
		PRVM_G_FLOAT(OFS_RETURN) = -1.0;
		return;
	}
	
	d = &prog->fielddefs[i];
	PRVM_G_FLOAT(OFS_RETURN) = (prvm_vec_t)d->type;
}

// KrimZon - DP_QC_ENTITYDATA
/*
=========
VM_getentityfieldstring

string(float fieldnum, entity ent) getentityfieldstring
=========
*/
void VM_getentityfieldstring(prvm_prog_t *prog)
{
	// put the data into a string
	mdef_t *d;
	int type, j;
	prvm_eval_t *val;
	prvm_edict_t * ent;
	int i = (int)PRVM_G_FLOAT(OFS_PARM0);
	char valuebuf[MAX_INPUTLINE];
	
	if (i < 0 || i >= prog->numfielddefs)
	{
		VM_Warning(prog, "VM_entityfielddata: field index out of bounds!\n");
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
		return;
	}
	
	d = &prog->fielddefs[i];
	
	// get the entity
	ent = PRVM_G_EDICT(OFS_PARM1);
	if(ent->free)
	{
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
		VM_Warning(prog, "VM_entityfielddata: entity %i is free!\n", PRVM_NUM_FOR_EDICT(ent));
		return;
	}
	val = (prvm_eval_t *)(ent->fields.fp + d->ofs);
	
	// if it's 0 or blank, return an empty string
	type = d->type & ~DEF_SAVEGLOBAL;
	for (j=0 ; j<prvm_type_size[type] ; j++)
		if (val->ivector[j])
			break;
	if (j == prvm_type_size[type])
	{
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
		return;
	}

	PRVM_UglyValueString(prog, (etype_t)d->type, val, valuebuf, sizeof(valuebuf));
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, valuebuf, strlen(valuebuf));
}

// KrimZon - DP_QC_ENTITYDATA
/*
=========
VM_putentityfieldstring

float(float fieldnum, entity ent, string s) putentityfieldstring
=========
*/
void VM_putentityfieldstring(prvm_prog_t *prog)
{
	mdef_t *d;
	prvm_edict_t * ent;
	int i = (int)PRVM_G_FLOAT(OFS_PARM0);

	if (i < 0 || i >= prog->numfielddefs)
	{
		VM_Warning(prog, "VM_entityfielddata: field index out of bounds!\n");
		PRVM_G_FLOAT(OFS_RETURN) = 0.0f;
		return;
	}

	d = &prog->fielddefs[i];

	// get the entity
	ent = PRVM_G_EDICT(OFS_PARM1);
	if(ent->free)
	{
		VM_Warning(prog, "VM_entityfielddata: entity %i is free!\n", PRVM_NUM_FOR_EDICT(ent));
		PRVM_G_FLOAT(OFS_RETURN) = 0.0f;
		return;
	}

	// parse the string into the value
	PRVM_G_FLOAT(OFS_RETURN) = ( PRVM_ED_ParseEpair(prog, ent, d, PRVM_G_STRING(OFS_PARM2), false) ) ? 1.0f : 0.0f;
}

/*
=========
VM_strlen

float	strlen(string s)
=========
*/
//float(string s) strlen = #114; // returns how many characters are in a string
void VM_strlen(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_strlen);

	//PRVM_G_FLOAT(OFS_RETURN) = strlen(PRVM_G_STRING(OFS_PARM0));
	PRVM_G_FLOAT(OFS_RETURN) = u8_strlen(PRVM_G_STRING(OFS_PARM0));
}

// DRESK - Decolorized String
/*
=========
VM_strdecolorize

string	strdecolorize(string s)
=========
*/
// string (string s) strdecolorize = #472; // returns the passed in string with color codes stripped
void VM_strdecolorize(prvm_prog_t *prog)
{
	char szNewString[VM_TEMPSTRING_MAXSIZE];
	size_t szNewString_len;
	const char *szString;

	// Prepare Strings
	VM_SAFEPARMCOUNT(1,VM_strdecolorize);
	szString = PRVM_G_STRING(OFS_PARM0);
	szNewString_len = COM_StringDecolorize(szString, 0, szNewString, sizeof(szNewString), true);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, szNewString, szNewString_len);
}

// DRESK - String Length (not counting color codes)
/*
=========
VM_strlennocol

float	strlennocol(string s)
=========
*/
// float(string s) strlennocol = #471; // returns how many characters are in a string not including color codes
// For example, ^2Dresk returns a length of 5
void VM_strlennocol(prvm_prog_t *prog)
{
	const char *szString;
	int nCnt;

	VM_SAFEPARMCOUNT(1,VM_strlennocol);

	szString = PRVM_G_STRING(OFS_PARM0);

	//nCnt = (int)COM_StringLengthNoColors(szString, 0, NULL);
	nCnt = (int)u8_COM_StringLengthNoColors(szString, 0, NULL);

	PRVM_G_FLOAT(OFS_RETURN) = nCnt;
}

// DRESK - String to Uppercase and Lowercase
/*
=========
VM_strtolower

string	strtolower(string s)
=========
*/
// string (string s) strtolower = #480; // returns passed in string in lowercase form
void VM_strtolower(prvm_prog_t *prog)
{
	char szNewString[VM_TEMPSTRING_MAXSIZE];
	size_t szNewString_len;
	const char *szString;

	// Prepare Strings
	VM_SAFEPARMCOUNT(1,VM_strtolower);
	szString = PRVM_G_STRING(OFS_PARM0);

	szNewString_len = COM_ToLowerString(szString, szNewString, sizeof(szNewString) );

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, szNewString, szNewString_len);
}

/*
=========
VM_strtoupper

string	strtoupper(string s)
=========
*/
// string (string s) strtoupper = #481; // returns passed in string in uppercase form
void VM_strtoupper(prvm_prog_t *prog)
{
	char szNewString[VM_TEMPSTRING_MAXSIZE];
	size_t szNewString_len;
	const char *szString;

	// Prepare Strings
	VM_SAFEPARMCOUNT(1,VM_strtoupper);
	szString = PRVM_G_STRING(OFS_PARM0);

	szNewString_len = COM_ToUpperString(szString, szNewString, sizeof(szNewString) );

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, szNewString, szNewString_len);
}

/*
=========
VM_strcat

string strcat(string s, string...)
=========
*/
//string(string s, string...) strcat = #115;
// concatenates strings (for example "abc", "def" would return "abcdef")
// and returns as a tempstring
void VM_strcat(prvm_prog_t *prog)
{
	char s[VM_TEMPSTRING_MAXSIZE];
	size_t slen;

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_strcat);

	slen = VM_VarString(prog, 0, s, sizeof(s));
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, s, slen);
}

/*
=========
VM_substring

string	substring(string s, float start, float length)
=========
*/
// string(string s, float start, float length) substring = #116;
// returns a section of a string as a tempstring
void VM_substring(prvm_prog_t *prog)
{
	int start, length;
	int u_slength = 0, u_start;
	size_t u_length;
	const char *s;
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNT(3,VM_substring);

	/*
	s = PRVM_G_STRING(OFS_PARM0);
	start = (int)PRVM_G_FLOAT(OFS_PARM1);
	length = (int)PRVM_G_FLOAT(OFS_PARM2);
	slength = strlen(s);

	if (start < 0) // FTE_STRINGS feature
		start += slength;
	start = bound(0, start, slength);

	if (length < 0) // FTE_STRINGS feature
		length += slength - start + 1;
	maxlen = min((int)sizeof(string) - 1, slength - start);
	length = bound(0, length, maxlen);

	memcpy(string, s + start, length);
	string[length] = 0;
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, string);
	*/
	
	s = PRVM_G_STRING(OFS_PARM0);
	start = (int)PRVM_G_FLOAT(OFS_PARM1);
	length = (int)PRVM_G_FLOAT(OFS_PARM2);

	if (start < 0) // FTE_STRINGS feature
	{
		u_slength = (int)u8_strlen(s);
		start += u_slength;
		start = bound(0, start, u_slength);
	}

	if (length < 0) // FTE_STRINGS feature
	{
		if (!u_slength) // it's not calculated when it's not needed above
			u_slength = (int)u8_strlen(s);
		length += u_slength - start + 1;
	}
		
	// positive start, positive length
	u_start = u8_byteofs(s, start, NULL);
	if (u_start < 0)
	{
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
		return;
	}
	u_length = u8_bytelen(s + u_start, length);
	if (u_length >= sizeof(string)-1)
		u_length = sizeof(string)-1;
	
	memcpy(string, s + u_start, u_length);
	string[u_length] = '\0';
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, string, u_length);
}

/*
=========
VM_strreplace

string(string search, string replace, string subject) strreplace = #484;
=========
*/
// replaces all occurrences of search with replace in the string subject, and returns the result
void VM_strreplace(prvm_prog_t *prog)
{
	int i, j, si;
	const char *search, *replace, *subject;
	char string[VM_TEMPSTRING_MAXSIZE];
	int search_len, replace_len, subject_len;

	VM_SAFEPARMCOUNT(3,VM_strreplace);

	search = PRVM_G_STRING(OFS_PARM0);
	replace = PRVM_G_STRING(OFS_PARM1);
	subject = PRVM_G_STRING(OFS_PARM2);

	search_len = (int)strlen(search);
	replace_len = (int)strlen(replace);
	subject_len = (int)strlen(subject);

	si = 0;
	for (i = 0; i <= subject_len - search_len; i++)
	{
		for (j = 0; j < search_len; j++) // thus, i+j < subject_len
			if (subject[i+j] != search[j])
				break;
		if (j == search_len)
		{
			// NOTE: if search_len == 0, we always hit THIS case, and never the other
			// found it at offset 'i'
			for (j = 0; j < replace_len && si < (int)sizeof(string) - 1; j++)
				string[si++] = replace[j];
			if(search_len > 0)
			{
				i += search_len - 1;
			}
			else
			{
				// the above would subtract 1 from i... so we
				// don't do that, but instead output the next
				// char
				if (si < (int)sizeof(string) - 1)
					string[si++] = subject[i];
			}
		}
		else
		{
			// in THIS case, we know search_len > 0, thus i < subject_len
			// not found
			if (si < (int)sizeof(string) - 1)
				string[si++] = subject[i];
		}
	}
	// remaining chars (these cannot match)
	for (; i < subject_len; i++)
		if (si < (int)sizeof(string) - 1)
			string[si++] = subject[i];
	string[si] = '\0';

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, string, si);
}

/*
=========
VM_strireplace

string(string search, string replace, string subject) strireplace = #485;
=========
*/
// case-insensitive version of strreplace
void VM_strireplace(prvm_prog_t *prog)
{
	int i, j, si;
	const char *search, *replace, *subject;
	char string[VM_TEMPSTRING_MAXSIZE];
	int search_len, replace_len, subject_len;

	VM_SAFEPARMCOUNT(3, VM_strireplace);

	search = PRVM_G_STRING(OFS_PARM0);
	replace = PRVM_G_STRING(OFS_PARM1);
	subject = PRVM_G_STRING(OFS_PARM2);

	search_len = (int)strlen(search);
	replace_len = (int)strlen(replace);
	subject_len = (int)strlen(subject);

	si = 0;
	for (i = 0; i <= subject_len - search_len; i++)
	{
		for (j = 0; j < search_len; j++) // thus, i+j < subject_len
			if (tolower(subject[i+j]) != tolower(search[j]))
				break;
		if (j == search_len)
		{
			// NOTE: if search_len == 0, we always hit THIS case, and never the other
			// found it at offset 'i'
			for (j = 0; j < replace_len && si < (int)sizeof(string) - 1; j++)
				string[si++] = replace[j];
			if(search_len > 0)
			{
				i += search_len - 1;
			}
			else
			{
				// the above would subtract 1 from i... so we
				// don't do that, but instead output the next
				// char
				if (si < (int)sizeof(string) - 1)
					string[si++] = subject[i];
			}
		}
		else
		{
			// in THIS case, we know search_len > 0, thus i < subject_len
			// not found
			if (si < (int)sizeof(string) - 1)
				string[si++] = subject[i];
		}
	}
	// remaining chars (these cannot match)
	for (; i < subject_len; i++)
		if (si < (int)sizeof(string) - 1)
			string[si++] = subject[i];
	string[si] = '\0';

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, string, si);
}

/*
=========
VM_stov

vector	stov(string s)
=========
*/
//vector(string s) stov = #117; // returns vector value from a string
void VM_stov(prvm_prog_t *prog)
{
	char string[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNT(1,VM_stov);

	VM_VarString(prog, 0, string, sizeof(string));
	Math_atov(string, PRVM_G_VECTOR(OFS_RETURN));
}

/*
=========
VM_strzone

string	strzone(string s)
=========
*/
//string(string s, ...) strzone = #118; // makes a copy of a string into the string zone and returns it, this is often used to keep around a tempstring for longer periods of time (tempstrings are replaced often)
void VM_strzone(prvm_prog_t *prog)
{
	char *out;
	char string[VM_TEMPSTRING_MAXSIZE];
	size_t alloclen;

	VM_SAFEPARMCOUNT(1,VM_strzone);

	alloclen = VM_VarString(prog, 0, string, sizeof(string)) + 1;
	PRVM_G_INT(OFS_RETURN) = PRVM_AllocString(prog, alloclen, &out);
	memcpy(out, string, alloclen);
}

/*
=========
VM_strunzone

strunzone(string s)
=========
*/
//void(string s) strunzone = #119; // removes a copy of a string from the string zone (you can not use that string again or it may crash!!!)
void VM_strunzone(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1,VM_strunzone);
	PRVM_FreeString(prog, PRVM_G_INT(OFS_PARM0));
}

/*
=========
VM_tokenize

float tokenize(string s)
=========
*/
//float(string s) tokenize = #441; // takes apart a string into individal words (access them with argv), returns how many
//this function originally written by KrimZon, made shorter by LadyHavoc
//20040203: rewritten by LadyHavoc (no longer uses allocations)
static int num_tokens = 0;
static int tokens[VM_TEMPSTRING_MAXSIZE / 2];
static int tokens_startpos[VM_TEMPSTRING_MAXSIZE / 2];
static int tokens_endpos[VM_TEMPSTRING_MAXSIZE / 2];
static char tokenize_string[VM_TEMPSTRING_MAXSIZE];
void VM_tokenize (prvm_prog_t *prog)
{
	const char *p;

	VM_SAFEPARMCOUNT(1,VM_tokenize);

	dp_strlcpy(tokenize_string, PRVM_G_STRING(OFS_PARM0), sizeof(tokenize_string));
	p = tokenize_string;

	num_tokens = 0;
	for(;;)
	{
		if (num_tokens >= (int)(sizeof(tokens)/sizeof(tokens[0])))
			break;

		// skip whitespace here to find token start pos
		while(*p && ISWHITESPACE(*p))
			++p;

		tokens_startpos[num_tokens] = p - tokenize_string;
		if(!COM_ParseToken_VM_Tokenize(&p, false))
			break;
		tokens_endpos[num_tokens] = p - tokenize_string;
		tokens[num_tokens] = PRVM_SetTempString(prog, com_token, com_token_len);
		++num_tokens;
	}

	PRVM_G_FLOAT(OFS_RETURN) = num_tokens;
}

//float(string s) tokenize = #514; // takes apart a string into individal words (access them with argv), returns how many
void VM_tokenize_console (prvm_prog_t *prog)
{
	const char *p;

	VM_SAFEPARMCOUNT(1, VM_tokenize_console);

	dp_strlcpy(tokenize_string, PRVM_G_STRING(OFS_PARM0), sizeof(tokenize_string));
	p = tokenize_string;

	num_tokens = 0;
	for(;;)
	{
		if (num_tokens >= (int)(sizeof(tokens)/sizeof(tokens[0])))
			break;

		// skip whitespace here to find token start pos
		while(*p && ISWHITESPACE(*p))
			++p;

		tokens_startpos[num_tokens] = p - tokenize_string;
		if(!COM_ParseToken_Console(&p))
			break;
		tokens_endpos[num_tokens] = p - tokenize_string;
		tokens[num_tokens] = PRVM_SetTempString(prog, com_token, com_token_len);
		++num_tokens;
	}

	PRVM_G_FLOAT(OFS_RETURN) = num_tokens;
}

/*
=========
VM_tokenizebyseparator

float tokenizebyseparator(string s, string separator1, ...)
=========
*/
//float(string s, string separator1, ...) tokenizebyseparator = #479; // takes apart a string into individal words (access them with argv), returns how many
//this function returns the token preceding each instance of a separator (of
//which there can be multiple), and the text following the last separator
//useful for parsing certain kinds of data like IP addresses
//example:
//numnumbers = tokenizebyseparator("10.1.2.3", ".");
//returns 4 and the tokens "10" "1" "2" "3".
void VM_tokenizebyseparator (prvm_prog_t *prog)
{
	int j, k;
	int numseparators;
	int separatorlen[7];
	const char *separators[7];
	const char *p, *p0;
	const char *token;
	char tokentext[MAX_INPUTLINE];

	VM_SAFEPARMCOUNTRANGE(2, 8,VM_tokenizebyseparator);

	dp_strlcpy(tokenize_string, PRVM_G_STRING(OFS_PARM0), sizeof(tokenize_string));
	p = tokenize_string;

	numseparators = 0;
	for (j = 1;j < prog->argc;j++)
	{
		// skip any blank separator strings
		const char *s = PRVM_G_STRING(OFS_PARM0+j*3);
		if (!s[0])
			continue;
		separators[numseparators] = s;
		separatorlen[numseparators] = (int)strlen(s);
		numseparators++;
	}

	num_tokens = 0;
	j = 0;

	while (num_tokens < (int)(sizeof(tokens)/sizeof(tokens[0])))
	{
		token = tokentext + j;
		tokens_startpos[num_tokens] = p - tokenize_string;
		p0 = p;
		while (*p)
		{
			for (k = 0;k < numseparators;k++)
			{
				if (!strncmp(p, separators[k], separatorlen[k]))
				{
					p += separatorlen[k];
					break;
				}
			}
			if (k < numseparators)
				break;
			if (j < (int)sizeof(tokentext)-1)
				tokentext[j++] = *p;
			p++;
			p0 = p;
		}
		tokens_endpos[num_tokens] = p0 - tokenize_string;
		if (j >= (int)sizeof(tokentext))
			break;
		tokentext[j] = '\0';
		tokens[num_tokens++] = PRVM_SetTempString(prog, token, j++ - (token - tokentext));
		if (!*p)
			break;
	}

	PRVM_G_FLOAT(OFS_RETURN) = num_tokens;
}

//string(float n) argv = #442; // returns a word from the tokenized string (returns nothing for an invalid index)
//this function originally written by KrimZon, made shorter by LadyHavoc
void VM_argv (prvm_prog_t *prog)
{
	int token_num;

	VM_SAFEPARMCOUNT(1,VM_argv);

	token_num = (int)PRVM_G_FLOAT(OFS_PARM0);

	if(token_num < 0)
		token_num += num_tokens;

	if (token_num >= 0 && token_num < num_tokens)
		PRVM_G_INT(OFS_RETURN) = tokens[token_num];
	else
		PRVM_G_INT(OFS_RETURN) = OFS_NULL;
}

//float(float n) argv_start_index = #515; // returns the start index of a token
void VM_argv_start_index (prvm_prog_t *prog)
{
	int token_num;

	VM_SAFEPARMCOUNT(1,VM_argv);

	token_num = (int)PRVM_G_FLOAT(OFS_PARM0);

	if(token_num < 0)
		token_num += num_tokens;

	if (token_num >= 0 && token_num < num_tokens)
		PRVM_G_FLOAT(OFS_RETURN) = tokens_startpos[token_num];
	else
		PRVM_G_FLOAT(OFS_RETURN) = -1;
}

//float(float n) argv_end_index = #516; // returns the end index of a token
void VM_argv_end_index (prvm_prog_t *prog)
{
	int token_num;

	VM_SAFEPARMCOUNT(1,VM_argv);

	token_num = (int)PRVM_G_FLOAT(OFS_PARM0);

	if(token_num < 0)
		token_num += num_tokens;

	if (token_num >= 0 && token_num < num_tokens)
		PRVM_G_FLOAT(OFS_RETURN) = tokens_endpos[token_num];
	else
		PRVM_G_FLOAT(OFS_RETURN) = -1;
}

/*
=========
VM_isserver

float	isserver()
=========
*/
void VM_isserver(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0, VM_isserver);

	PRVM_G_FLOAT(OFS_RETURN) = sv.active;
}

/*
=========
VM_clientcount

float	clientcount()
=========
*/
void VM_clientcount(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_clientcount);

	PRVM_G_FLOAT(OFS_RETURN) = svs.maxclients;
}

/*
=========
VM_clientstate

float	clientstate()
=========
*/
void VM_clientstate(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_clientstate);


	switch( cls.state ) {
		case ca_uninitialized:
		case ca_dedicated:
			PRVM_G_FLOAT(OFS_RETURN) = 0;
			break;
		case ca_disconnected:
			PRVM_G_FLOAT(OFS_RETURN) = 1;
			break;
		case ca_connected:
			PRVM_G_FLOAT(OFS_RETURN) = 2;
			break;
		default:
			// should never be reached!
			break;
	}
}

/*
=========
VM_getostype

float	getostype(prvm_prog_t *prog)
=========
*/ // not used at the moment -> not included in the common list
void VM_getostype(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_getostype);

	/*
	OS_WINDOWS
	OS_LINUX
	OS_MAC - not supported
	*/

#ifdef WIN32
	PRVM_G_FLOAT(OFS_RETURN) = 0;
#elif defined(MACOSX)
	PRVM_G_FLOAT(OFS_RETURN) = 2;
#else
	PRVM_G_FLOAT(OFS_RETURN) = 1;
#endif
}

/*
=========
VM_gettime

float	gettime(prvm_prog_t *prog)
=========
*/
float CDAudio_GetPosition(void);
void VM_gettime(prvm_prog_t *prog)
{
	int timer_index;

	VM_SAFEPARMCOUNTRANGE(0,1,VM_gettime);

	if(prog->argc == 0)
	{
		PRVM_G_FLOAT(OFS_RETURN) = (prvm_vec_t) host.realtime;
	}
	else
	{
		timer_index = (int) PRVM_G_FLOAT(OFS_PARM0);
		switch(timer_index)
		{
			case 0: // GETTIME_FRAMESTART
				PRVM_G_FLOAT(OFS_RETURN) = host.realtime - prog->starttime;
				break;
			case 1: // GETTIME_REALTIME
				PRVM_G_FLOAT(OFS_RETURN) = Sys_DirtyTime();
				break;
			case 2: // GETTIME_HIRES
				PRVM_G_FLOAT(OFS_RETURN) = (Sys_DirtyTime() - host.dirtytime);
				break;
			case 3: // GETTIME_UPTIME
				PRVM_G_FLOAT(OFS_RETURN) = host.realtime;
				break;
			case 4: // GETTIME_CDTRACK
				PRVM_G_FLOAT(OFS_RETURN) = CDAudio_GetPosition();
				break;
			default:
				VM_Warning(prog, "VM_gettime: unsupported timer specified, returning realtime\n");
				PRVM_G_FLOAT(OFS_RETURN) = host.realtime;
				break;
		}
	}
}

/*
=========
VM_getsoundtime

float	getsoundtime(prvm_prog_t *prog)
=========
*/

void VM_getsoundtime (prvm_prog_t *prog)
{
	int entnum, entchannel;
	VM_SAFEPARMCOUNT(2,VM_getsoundtime);

	if (prog == SVVM_prog)
		entnum = PRVM_NUM_FOR_EDICT(PRVM_G_EDICT(OFS_PARM0));
	else if (prog == CLVM_prog)
		entnum = MAX_EDICTS + PRVM_NUM_FOR_EDICT(PRVM_G_EDICT(OFS_PARM0));
	else
	{
		VM_Warning(prog, "VM_getsoundtime: not supported on this progs\n");
		PRVM_G_FLOAT(OFS_RETURN) = -1;
		return;
	}
	entchannel = (int)PRVM_G_FLOAT(OFS_PARM1);
	entchannel = CHAN_USER2ENGINE(entchannel);
	if (!IS_CHAN(entchannel))
		VM_Warning(prog, "VM_getsoundtime: bad channel %i\n", entchannel);
	PRVM_G_FLOAT(OFS_RETURN) = (prvm_vec_t)S_GetEntChannelPosition(entnum, entchannel);
}

/*
=========
VM_GetSoundLen

string	soundlength (string sample)
=========
*/
void VM_soundlength (prvm_prog_t *prog)
{
	const char *s;

	VM_SAFEPARMCOUNT(1, VM_soundlength);

	s = PRVM_G_STRING(OFS_PARM0);
	PRVM_G_FLOAT(OFS_RETURN) = S_SoundLength(s);
}

/*
=========
VM_loadfromdata

loadfromdata(string data)
=========
*/
void VM_loadfromdata(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1, VM_loadfromdata);

	PRVM_ED_LoadFromFile(prog, PRVM_G_STRING(OFS_PARM0));
}

/*
========================
VM_parseentitydata

parseentitydata(entity ent, string data)
========================
*/
void VM_parseentitydata(prvm_prog_t *prog)
{
	prvm_edict_t *ent;
	const char *data;

	VM_SAFEPARMCOUNT(2, VM_parseentitydata);

	// get edict and test it
	ent = PRVM_G_EDICT(OFS_PARM0);
	if (ent->free)
		prog->error_cmd("VM_parseentitydata: %s: Can only set already spawned entities (entity %i is free)!", prog->name, PRVM_NUM_FOR_EDICT(ent));

	data = PRVM_G_STRING(OFS_PARM1);

	// parse the opening brace
	if (!COM_ParseToken_Simple(&data, false, false, true) || com_token[0] != '{' )
		prog->error_cmd("VM_parseentitydata: %s: Couldn't parse entity data:\n%s", prog->name, data );

	PRVM_ED_ParseEdict(prog, data, ent, true);
}

/*
=========
VM_loadfromfile

loadfromfile(string file)
=========
*/
void VM_loadfromfile(prvm_prog_t *prog)
{
	const char *filename;
	char *data;

	VM_SAFEPARMCOUNT(1,VM_loadfromfile);

	filename = PRVM_G_STRING(OFS_PARM0);
	if (FS_CheckNastyPath(filename, false))
	{
		PRVM_G_FLOAT(OFS_RETURN) = -4;
		VM_Warning(prog, "VM_loadfromfile: dangerous or non-portable filename \"%s\" not allowed. (contains : or \\ or begins with .. or /)\n", filename);
		return;
	}

	// not conform with VM_fopen
	data = (char *)FS_LoadFile(filename, tempmempool, false, NULL);
	if (data == NULL)
		PRVM_G_FLOAT(OFS_RETURN) = -1;

	PRVM_ED_LoadFromFile(prog, data);

	if(data)
		Mem_Free(data);
}


/*
=========
VM_modulo

float	mod(float val, float m)
=========
*/
void VM_modulo(prvm_prog_t *prog)
{
	vec_t val, m;

	VM_SAFEPARMCOUNT(2, VM_modulo);

	val = PRVM_G_FLOAT(OFS_PARM0);
	m   = PRVM_G_FLOAT(OFS_PARM1);

	// matches how gmqcc implements % when mod() builtin isn't defined, and FTEQW mod()
	if (m)
		PRVM_G_FLOAT(OFS_RETURN) = val - m * (prvm_int_t)(val / m);
	else
	{
		VM_Warning(prog, "Attempted modulo of %f by zero\n", val);
		PRVM_G_FLOAT(OFS_RETURN) = 0;
	}
}

static void VM_Search_Init(prvm_prog_t *prog)
{
	int i;
	for (i = 0;i < PRVM_MAX_OPENSEARCHES;i++)
		prog->opensearches[i] = NULL;
}

static void VM_Search_Reset(prvm_prog_t *prog)
{
	int i;
	// reset the fssearch list
	for(i = 0; i < PRVM_MAX_OPENSEARCHES; i++)
	{
		if(prog->opensearches[i])
			FS_FreeSearch(prog->opensearches[i]);
		prog->opensearches[i] = NULL;
	}
}

/*
=========
VM_search_begin

float search_begin(string pattern, float caseinsensitive, float quiet[, string packfile])
=========
*/
void VM_search_begin(prvm_prog_t *prog)
{
	int handle;
	const char *packfile = NULL, *pattern;
	int caseinsens, quiet;

	VM_SAFEPARMCOUNTRANGE(3, 4, VM_search_begin);

	pattern = PRVM_G_STRING(OFS_PARM0);

	VM_CheckEmptyString(prog, pattern);

	caseinsens = (int)PRVM_G_FLOAT(OFS_PARM1);
	quiet = (int)PRVM_G_FLOAT(OFS_PARM2);

	// optional packfile parameter (DP_QC_FS_SEARCH_PACKFILE)
	if(prog->argc >= 4)
		packfile = PRVM_G_STRING(OFS_PARM3);

	for(handle = 0; handle < PRVM_MAX_OPENSEARCHES; handle++)
		if(!prog->opensearches[handle])
			break;

	if(handle >= PRVM_MAX_OPENSEARCHES)
	{
		PRVM_G_FLOAT(OFS_RETURN) = -2;
		VM_Warning(prog, "VM_search_begin: ran out of search handles (max %i)\n", PRVM_MAX_OPENSEARCHES);
		return;
	}

	if(!(prog->opensearches[handle] = FS_Search(pattern,caseinsens, quiet, packfile)))
		PRVM_G_FLOAT(OFS_RETURN) = -1;
	else
	{
		prog->opensearches_origin[handle] = PRVM_AllocationOrigin(prog);
		PRVM_G_FLOAT(OFS_RETURN) = handle;
	}
}

/*
=========
VM_search_end

void	search_end(float handle)
=========
*/
void VM_search_end(prvm_prog_t *prog)
{
	int handle;
	VM_SAFEPARMCOUNT(1, VM_search_end);

	handle = (int)PRVM_G_FLOAT(OFS_PARM0);

	if(handle < 0 || handle >= PRVM_MAX_OPENSEARCHES)
	{
		VM_Warning(prog, "VM_search_end: invalid handle %i\n", handle);
		return;
	}
	if(prog->opensearches[handle] == NULL)
	{
		VM_Warning(prog, "VM_search_end: no such handle %i\n", handle);
		return;
	}

	FS_FreeSearch(prog->opensearches[handle]);
	prog->opensearches[handle] = NULL;
	if(prog->opensearches_origin[handle])
		PRVM_Free((char *)prog->opensearches_origin[handle]);
}

/*
=========
VM_search_getsize

float	search_getsize(float handle)
=========
*/
void VM_search_getsize(prvm_prog_t *prog)
{
	int handle;
	VM_SAFEPARMCOUNT(1, VM_search_getsize);

	handle = (int)PRVM_G_FLOAT(OFS_PARM0);

	if(handle < 0 || handle >= PRVM_MAX_OPENSEARCHES)
	{
		VM_Warning(prog, "VM_search_getsize: invalid handle %i\n", handle);
		return;
	}
	if(prog->opensearches[handle] == NULL)
	{
		VM_Warning(prog, "VM_search_getsize: no such handle %i\n", handle);
		return;
	}

	PRVM_G_FLOAT(OFS_RETURN) = prog->opensearches[handle]->numfilenames;
}

/*
=========
VM_search_getfilename

string	search_getfilename(float handle, float num)
=========
*/
void VM_search_getfilename(prvm_prog_t *prog)
{
	int handle, filenum;

	VM_SAFEPARMCOUNT(2, VM_search_getfilename);

	handle = (int)PRVM_G_FLOAT(OFS_PARM0);
	filenum = (int)PRVM_G_FLOAT(OFS_PARM1);

	if(handle < 0 || handle >= PRVM_MAX_OPENSEARCHES)
	{
		VM_Warning(prog, "VM_search_getfilename: invalid handle %i\n", handle);
		return;
	}
	if(prog->opensearches[handle] == NULL)
	{
		VM_Warning(prog, "VM_search_getfilename: no such handle %i\n", handle);
		return;
	}
	if(filenum < 0 || filenum >= prog->opensearches[handle]->numfilenames)
	{
		VM_Warning(prog, "VM_search_getfilename: invalid filenum %i\n", filenum);
		return;
	}

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog,
	                                            prog->opensearches[handle]->filenames[filenum],
	                                            strlen(prog->opensearches[handle]->filenames[filenum]));
}

/*
=========
VM_chr

string	chr(float ascii)
=========
*/
void VM_chr(prvm_prog_t *prog)
{
	/*
	char tmp[2];
	VM_SAFEPARMCOUNT(1, VM_chr);

	tmp[0] = (unsigned char) PRVM_G_FLOAT(OFS_PARM0);
	tmp[1] = 0;

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, tmp);
	*/
	
	char tmp[8];
	int len;

	VM_SAFEPARMCOUNT(1, VM_chr);
	len = u8_fromchar((Uchar)PRVM_G_FLOAT(OFS_PARM0), tmp, sizeof(tmp));
	tmp[len] = '\0';
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, tmp, len);
}

/*
=========
VM_keynumtostring

string keynumtostring(float keynum)
=========
*/
void VM_keynumtostring (prvm_prog_t *prog)
{
	char tinystr[TINYSTR_LEN];
	const char *str; // Key_KeynumToString doesn't always return tinystr

	VM_SAFEPARMCOUNT(1, VM_keynumtostring);
	str = Key_KeynumToString((int)PRVM_G_FLOAT(OFS_PARM0), tinystr, sizeof(tinystr));
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, str, strlen(str));
}

/*
=========
VM_findkeysforcommand

string	findkeysforcommand(string command, float bindmap)

the returned string is an altstring
=========
*/
#define FKFC_NUMKEYS 5
void M_FindKeysForCommand(const char *command, int *keys);
void VM_findkeysforcommand(prvm_prog_t *prog)
{
	const char *cmd;
	char ret[VM_TEMPSTRING_MAXSIZE];
	size_t ret_len;
	int keys[FKFC_NUMKEYS];
	int i;
	int bindmap;
	char vabuf[1024];

	VM_SAFEPARMCOUNTRANGE(1, 2, VM_findkeysforcommand);

	cmd = PRVM_G_STRING(OFS_PARM0);
	if(prog->argc == 2)
		bindmap = bound(-1, PRVM_G_FLOAT(OFS_PARM1), MAX_BINDMAPS-1);
	else
		bindmap = 0; // consistent to "bind"

	VM_CheckEmptyString(prog, cmd);

	Key_FindKeysForCommand(cmd, keys, FKFC_NUMKEYS, bindmap);

	ret[0] = 0;
	for(i = 0; i < FKFC_NUMKEYS; i++)
		ret_len = dp_strlcat(ret, va(vabuf, sizeof(vabuf), " \'%i\'", keys[i]), sizeof(ret));

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, ret, ret_len);
}

/*
=========
VM_stringtokeynum

float stringtokeynum(string key)
=========
*/
void VM_stringtokeynum (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT( 1, VM_stringtokeynum );

	PRVM_G_FLOAT(OFS_RETURN) = Key_StringToKeynum(PRVM_G_STRING(OFS_PARM0));
}

/*
=========
VM_getkeybind

string getkeybind(float key, float bindmap)
=========
*/
void VM_getkeybind (prvm_prog_t *prog)
{
	int bindmap;
	const char *bind;

	VM_SAFEPARMCOUNTRANGE(1, 2, VM_getkeybind);
	if(prog->argc == 2)
		bindmap = bound(-1, PRVM_G_FLOAT(OFS_PARM1), MAX_BINDMAPS-1);
	else
		bindmap = 0; // consistent to "bind"
	bind = Key_GetBind((int)PRVM_G_FLOAT(OFS_PARM0), bindmap);
	PRVM_G_INT(OFS_RETURN) = bind ? PRVM_SetTempString(prog, bind, strlen(bind)) : 0;
}

/*
=========
VM_setkeybind

float setkeybind(float key, string cmd, float bindmap)
=========
*/
void VM_setkeybind (prvm_prog_t *prog)
{
	int bindmap;
	VM_SAFEPARMCOUNTRANGE(2, 3, VM_setkeybind);
	if(prog->argc == 3)
		bindmap = bound(-1, PRVM_G_FLOAT(OFS_PARM2), MAX_BINDMAPS-1);
	else
		bindmap = 0; // consistent to "bind"

	PRVM_G_FLOAT(OFS_RETURN) = 0;
	if(Key_SetBinding((int)PRVM_G_FLOAT(OFS_PARM0), bindmap, PRVM_G_STRING(OFS_PARM1)))
		PRVM_G_FLOAT(OFS_RETURN) = 1;
}

/*
=========
VM_getbindmap

vector getbindmaps()
=========
*/
void VM_getbindmaps (prvm_prog_t *prog)
{
	int fg, bg;
	VM_SAFEPARMCOUNT(0, VM_getbindmaps);
	Key_GetBindMap(&fg, &bg);
	PRVM_G_VECTOR(OFS_RETURN)[0] = fg;
	PRVM_G_VECTOR(OFS_RETURN)[1] = bg;
	PRVM_G_VECTOR(OFS_RETURN)[2] = 0;
}

/*
=========
VM_setbindmap

float setbindmaps(vector bindmap)
=========
*/
void VM_setbindmaps (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1, VM_setbindmaps);
	PRVM_G_FLOAT(OFS_RETURN) = 0;
	if(PRVM_G_VECTOR(OFS_PARM0)[2] == 0)
		if(Key_SetBindMap((int)PRVM_G_VECTOR(OFS_PARM0)[0], (int)PRVM_G_VECTOR(OFS_PARM0)[1]))
			PRVM_G_FLOAT(OFS_RETURN) = 1;
}

/*
========================
VM_gecko_create

float[bool] gecko_create( string name )
========================
*/
void VM_gecko_create(prvm_prog_t *prog) {
	// REMOVED
	PRVM_G_FLOAT( OFS_RETURN ) = 0;
}

/*
========================
VM_gecko_destroy

void gecko_destroy( string name )
========================
*/
void VM_gecko_destroy(prvm_prog_t *prog) {
	// REMOVED
}

/*
========================
VM_gecko_navigate

void gecko_navigate( string name, string URI )
========================
*/
void VM_gecko_navigate(prvm_prog_t *prog) {
	// REMOVED
}

/*
========================
VM_gecko_keyevent

float[bool] gecko_keyevent( string name, float key, float eventtype ) 
========================
*/
void VM_gecko_keyevent(prvm_prog_t *prog) {
	// REMOVED
	PRVM_G_FLOAT( OFS_RETURN ) = 0;
}

/*
========================
VM_gecko_movemouse

void gecko_mousemove( string name, float x, float y )
========================
*/
void VM_gecko_movemouse(prvm_prog_t *prog) {
	// REMOVED
}


/*
========================
VM_gecko_resize

void gecko_resize( string name, float w, float h )
========================
*/
void VM_gecko_resize(prvm_prog_t *prog) {
	// REMOVED
}


/*
========================
VM_gecko_get_texture_extent

vector gecko_get_texture_extent( string name )
========================
*/
void VM_gecko_get_texture_extent(prvm_prog_t *prog) {
	// REMOVED
	PRVM_G_VECTOR(OFS_RETURN)[0] = 0;
	PRVM_G_VECTOR(OFS_RETURN)[1] = 0;
}



/*
==============
VM_makevectors

Writes new values for v_forward, v_up, and v_right based on angles
void makevectors(vector angle)
==============
*/
void VM_makevectors (prvm_prog_t *prog)
{
	vec3_t angles, forward, right, up;
	VM_SAFEPARMCOUNT(1, VM_makevectors);
	VectorCopy(PRVM_G_VECTOR(OFS_PARM0), angles);
	AngleVectors(angles, forward, right, up);
	VectorCopy(forward, PRVM_gameglobalvector(v_forward));
	VectorCopy(right, PRVM_gameglobalvector(v_right));
	VectorCopy(up, PRVM_gameglobalvector(v_up));
}

/*
==============
VM_vectorvectors

Writes new values for v_forward, v_up, and v_right based on the given forward vector
vectorvectors(vector)
==============
*/
void VM_vectorvectors (prvm_prog_t *prog)
{
	vec3_t forward, right, up;
	VM_SAFEPARMCOUNT(1, VM_vectorvectors);
	VectorNormalize2(PRVM_G_VECTOR(OFS_PARM0), forward);
	VectorVectors(forward, right, up);
	VectorCopy(forward, PRVM_gameglobalvector(v_forward));
	VectorCopy(right, PRVM_gameglobalvector(v_right));
	VectorCopy(up, PRVM_gameglobalvector(v_up));
}

// float(float number, float quantity) bitshift (EXT_BITSHIFT)
void VM_bitshift (prvm_prog_t *prog)
{
	prvm_int_t n1, n2;
	VM_SAFEPARMCOUNT(2, VM_bitshift);

	n1 = (prvm_int_t)fabs((prvm_vec_t)((prvm_int_t)PRVM_G_FLOAT(OFS_PARM0)));
	n2 = (prvm_int_t)PRVM_G_FLOAT(OFS_PARM1);
	if(!n1)
		PRVM_G_FLOAT(OFS_RETURN) = n1;
	else
	if(n2 < 0)
		PRVM_G_FLOAT(OFS_RETURN) = (n1 >> -n2);
	else
		PRVM_G_FLOAT(OFS_RETURN) = (n1 << n2);
}

////////////////////////////////////////
// AltString functions
////////////////////////////////////////

/*
========================
VM_altstr_count

float altstr_count(string)
========================
*/
void VM_altstr_count(prvm_prog_t *prog)
{
	const char *altstr, *pos;
	int	count;

	VM_SAFEPARMCOUNT( 1, VM_altstr_count );

	altstr = PRVM_G_STRING( OFS_PARM0 );
	//VM_CheckEmptyString(prog,  altstr );

	for( count = 0, pos = altstr ; *pos ; pos++ ) {
		if( *pos == '\\' ) {
			if( !*++pos ) {
				break;
			}
		} else if( *pos == '\'' ) {
			count++;
		}
	}

	PRVM_G_FLOAT( OFS_RETURN ) = (prvm_vec_t) (count / 2);
}

/*
========================
VM_altstr_prepare

string altstr_prepare(string)
========================
*/
void VM_altstr_prepare(prvm_prog_t *prog)
{
	const char *instr, *in;
	char outstr[VM_TEMPSTRING_MAXSIZE];
	size_t outpos;

	VM_SAFEPARMCOUNT( 1, VM_altstr_prepare );

	instr = PRVM_G_STRING( OFS_PARM0 );

	for (in = instr, outpos = 0; *in && outpos < sizeof(outstr) - 1; ++in)
	{
		if (*in == '\'' && outpos < sizeof(outstr) - 2)
		{
			outstr[outpos++] = '\\';
			outstr[outpos++] = '\'';
		}
		else
			outstr[outpos++] = *in;
	}

	outstr[outpos] = '\0';
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, outstr, outpos);
}

/*
========================
VM_altstr_get

string altstr_get(string, float)
========================
*/
void VM_altstr_get(prvm_prog_t *prog)
{
	const char *altstr, *pos;
	char *out;
	int count, size;
	char outstr[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNT( 2, VM_altstr_get );

	altstr = PRVM_G_STRING( OFS_PARM0 );

	count = (int)PRVM_G_FLOAT( OFS_PARM1 );
	count = count * 2 + 1;

	for( pos = altstr ; *pos && count ; pos++ )
		if( *pos == '\\' ) {
			if( !*++pos )
				break;
		} else if( *pos == '\'' )
			count--;

	if( !*pos ) {
		PRVM_G_INT( OFS_RETURN ) = 0;
		return;
	}

	for( out = outstr, size = sizeof(outstr) - 1 ; size && *pos ; size--, pos++, out++ )
		if( *pos == '\\' ) {
			if( !*++pos )
				break;
			*out = *pos;
			size--;
		} else if( *pos == '\'' )
			break;
		else
			*out = *pos;

	*out = '\0';
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, outstr, out - outstr);
}

/*
========================
VM_altstr_set

string altstr_set(string altstr, float num, string set)
========================
*/
void VM_altstr_set(prvm_prog_t *prog)
{
    int num;
	const char *altstr, *str;
	const char *in;
	char *out;
	char outstr[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNT( 3, VM_altstr_set );

	altstr = PRVM_G_STRING( OFS_PARM0 );

	num = (int)PRVM_G_FLOAT( OFS_PARM1 );

	str = PRVM_G_STRING( OFS_PARM2 );

	out = outstr;
	for( num = num * 2 + 1, in = altstr; *in && num; *out++ = *in++ )
		if( *in == '\\' ) {
			if( !*++in ) {
				break;
			}
		} else if( *in == '\'' ) {
			num--;
		}

	// copy set in
	for( ; *str; *out++ = *str++ );
	// now jump over the old content
	for( ; *in ; in++ )
		if( *in == '\'' || (*in == '\\' && !*++in) )
			break;

	out += dp_strlcpy(out, in, outstr + sizeof(outstr) - out);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, outstr, out - outstr);
}

/*
========================
VM_altstr_ins
insert after num
string	altstr_ins(string altstr, float num, string set)
========================
*/
void VM_altstr_ins(prvm_prog_t *prog)
{
	int num;
	const char *set;
	const char *in;
	char *out;
	char outstr[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNT(3, VM_altstr_ins);

	in = PRVM_G_STRING( OFS_PARM0 );
	num = (int)PRVM_G_FLOAT( OFS_PARM1 );
	set = PRVM_G_STRING( OFS_PARM2 );

	out = outstr;
	for( num = num * 2 + 2 ; *in && num > 0 ; *out++ = *in++ )
		if( *in == '\\' ) {
			if( !*++in ) {
				break;
			}
		} else if( *in == '\'' ) {
			num--;
		}

	*out++ = '\'';
	for( ; *set ; *out++ = *set++ );
	*out++ = '\'';

	out += dp_strlcpy(out, in, outstr + sizeof(outstr) - out);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, outstr, out - outstr);
}


////////////////////////////////////////
// BufString functions
////////////////////////////////////////
//[515]: string buffers support

static size_t stringbuffers_sortlength;

static void BufStr_Expand(prvm_prog_t *prog, prvm_stringbuffer_t *stringbuffer, int strindex)
{
	if (stringbuffer->max_strings <= strindex)
	{
		char **oldstrings = stringbuffer->strings;
		stringbuffer->max_strings = max(stringbuffer->max_strings * 2, 128);
		while (stringbuffer->max_strings <= strindex)
			stringbuffer->max_strings *= 2;
		stringbuffer->strings = (char **) Mem_Alloc(prog->progs_mempool, stringbuffer->max_strings * sizeof(stringbuffer->strings[0]));
		if (stringbuffer->num_strings > 0)
			memcpy(stringbuffer->strings, oldstrings, stringbuffer->num_strings * sizeof(stringbuffer->strings[0]));
		if (oldstrings)
			Mem_Free(oldstrings);
	}
}

static void BufStr_Shrink(prvm_prog_t *prog, prvm_stringbuffer_t *stringbuffer)
{
	// reduce num_strings if there are empty string slots at the end
	while (stringbuffer->num_strings > 0 && stringbuffer->strings[stringbuffer->num_strings - 1] == NULL)
		stringbuffer->num_strings--;

	// if empty, free the string pointer array
	if (stringbuffer->num_strings == 0)
	{
		stringbuffer->max_strings = 0;
		if (stringbuffer->strings)
			Mem_Free(stringbuffer->strings);
		stringbuffer->strings = NULL;
	}
}

static int BufStr_SortStringsUP (const void *in1, const void *in2)
{
	const char *a, *b;
	a = *((const char **) in1);
	b = *((const char **) in2);
	if(!a || !a[0])	return 1;
	if(!b || !b[0])	return -1;
	return strncmp(a, b, stringbuffers_sortlength);
}

static int BufStr_SortStringsDOWN (const void *in1, const void *in2)
{
	const char *a, *b;
	a = *((const char **) in1);
	b = *((const char **) in2);
	if(!a || !a[0])	return 1;
	if(!b || !b[0])	return -1;
	return strncmp(b, a, stringbuffers_sortlength);
}

prvm_stringbuffer_t *BufStr_FindCreateReplace (prvm_prog_t *prog, int bufindex, unsigned flags, const char *format)
{
	prvm_stringbuffer_t *stringbuffer;
	int i;

	if (bufindex < 0)
		return NULL;

	// find buffer with wanted index
	if (bufindex < (int)Mem_ExpandableArray_IndexRange(&prog->stringbuffersarray))
	{
		if ( (stringbuffer = (prvm_stringbuffer_t*) Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, bufindex)) )
		{
			if (stringbuffer->flags & STRINGBUFFER_TEMP)
				stringbuffer->flags = flags; // created but has not been used yet
			return stringbuffer;
		}
		return NULL;
	}

	// allocate new buffer with wanted index
	while(1)
	{
		stringbuffer = (prvm_stringbuffer_t *) Mem_ExpandableArray_AllocRecord(&prog->stringbuffersarray);
		stringbuffer->flags = STRINGBUFFER_TEMP;
		for (i = 0;stringbuffer != Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, i);i++);
		if (i == bufindex)
		{
			stringbuffer->flags = flags; // mark as used
			break;
		}
	}
	return stringbuffer;
}

void BufStr_Set(prvm_prog_t *prog, prvm_stringbuffer_t *stringbuffer, int strindex, const char *str)
{
	size_t  alloclen;

	if (!stringbuffer || strindex < 0)
		return;

	BufStr_Expand(prog, stringbuffer, strindex);
	stringbuffer->num_strings = max(stringbuffer->num_strings, strindex + 1);
	if (stringbuffer->strings[strindex])
		Mem_Free(stringbuffer->strings[strindex]);
	stringbuffer->strings[strindex] = NULL;

	if (str)
	{
		// not the NULL string!
		alloclen = strlen(str) + 1;
		stringbuffer->strings[strindex] = (char *)Mem_Alloc(prog->progs_mempool, alloclen);
		memcpy(stringbuffer->strings[strindex], str, alloclen);
	}

	BufStr_Shrink(prog, stringbuffer);
}

void BufStr_Del(prvm_prog_t *prog, prvm_stringbuffer_t *stringbuffer)
{
	int i;
	
	if (!stringbuffer)
		return;

	for (i = 0;i < stringbuffer->num_strings;i++)
		if (stringbuffer->strings[i])
			Mem_Free(stringbuffer->strings[i]);
	if (stringbuffer->strings)
		Mem_Free(stringbuffer->strings);
	if(stringbuffer->origin)
		PRVM_Free((char *)stringbuffer->origin);
	Mem_ExpandableArray_FreeRecord(&prog->stringbuffersarray, stringbuffer);
}

void BufStr_Flush(prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	int i, numbuffers;

	numbuffers = (int)Mem_ExpandableArray_IndexRange(&prog->stringbuffersarray);
	for (i = 0; i < numbuffers; i++)
		if ( (stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, i)) )
			BufStr_Del(prog, stringbuffer);
	Mem_ExpandableArray_NewArray(&prog->stringbuffersarray, prog->progs_mempool, sizeof(prvm_stringbuffer_t), 64);
}

/*
========================
VM_buf_create
creates new buffer, and returns it's index, returns -1 if failed
float buf_create(prvm_prog_t *prog) = #460;
float newbuf(string format, float flags) = #460;
========================
*/

void VM_buf_create (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	int i;

	VM_SAFEPARMCOUNTRANGE(0, 2, VM_buf_create);

	// VorteX: optional parm1 (buffer format) is unfinished, to keep intact with future databuffers extension must be set to "string"
	if(prog->argc >= 1 && strcmp(PRVM_G_STRING(OFS_PARM0), "string"))
	{
		PRVM_G_FLOAT(OFS_RETURN) = -1;
		return;
	}
	stringbuffer = (prvm_stringbuffer_t *) Mem_ExpandableArray_AllocRecord(&prog->stringbuffersarray);
	for (i = 0;stringbuffer != Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, i);i++);
	stringbuffer->origin = PRVM_AllocationOrigin(prog);
	// optional flags parm
	if (prog->argc >= 2)
		stringbuffer->flags = (int)PRVM_G_FLOAT(OFS_PARM1) & STRINGBUFFER_QCFLAGS;
	PRVM_G_FLOAT(OFS_RETURN) = i;
}



/*
========================
VM_buf_del
deletes buffer and all strings in it
void buf_del(float bufhandle) = #461;
========================
*/
void VM_buf_del (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	VM_SAFEPARMCOUNT(1, VM_buf_del);
	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if (stringbuffer)
		BufStr_Del(prog, stringbuffer);
	else
	{
		VM_Warning(prog, "VM_buf_del: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
}

/*
========================
VM_buf_getsize
how many strings are stored in buffer
float buf_getsize(float bufhandle) = #462;
========================
*/
void VM_buf_getsize (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	VM_SAFEPARMCOUNT(1, VM_buf_getsize);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		PRVM_G_FLOAT(OFS_RETURN) = -1;
		VM_Warning(prog, "VM_buf_getsize: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	else
		PRVM_G_FLOAT(OFS_RETURN) = stringbuffer->num_strings;
}

/*
========================
VM_buf_copy
copy all content from one buffer to another, make sure it exists
void buf_copy(float bufhandle_from, float bufhandle_to) = #463;
========================
*/
void VM_buf_copy (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *srcstringbuffer, *dststringbuffer;
	int i;
	VM_SAFEPARMCOUNT(2, VM_buf_copy);

	srcstringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!srcstringbuffer)
	{
		VM_Warning(prog, "VM_buf_copy: invalid source buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	i = (int)PRVM_G_FLOAT(OFS_PARM1);
	if(i == (int)PRVM_G_FLOAT(OFS_PARM0))
	{
		VM_Warning(prog, "VM_buf_copy: source == destination (%i)\n", i);
		return;
	}
	dststringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!dststringbuffer)
	{
		VM_Warning(prog, "VM_buf_copy: invalid destination buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM1));
		return;
	}

	for (i = 0;i < dststringbuffer->num_strings;i++)
		if (dststringbuffer->strings[i])
			Mem_Free(dststringbuffer->strings[i]);
	if (dststringbuffer->strings)
		Mem_Free(dststringbuffer->strings);
	*dststringbuffer = *srcstringbuffer;
	if (dststringbuffer->max_strings)
		dststringbuffer->strings = (char **)Mem_Alloc(prog->progs_mempool, sizeof(dststringbuffer->strings[0]) * dststringbuffer->max_strings);

	for (i = 0;i < dststringbuffer->num_strings;i++)
	{
		if (srcstringbuffer->strings[i])
		{
			size_t stringlen;
			stringlen = strlen(srcstringbuffer->strings[i]) + 1;
			dststringbuffer->strings[i] = (char *)Mem_Alloc(prog->progs_mempool, stringlen);
			memcpy(dststringbuffer->strings[i], srcstringbuffer->strings[i], stringlen);
		}
	}
}

/*
========================
VM_buf_sort
sort buffer by beginnings of strings (cmplength defaults it's length)
"backward == true" means that sorting goes upside-down
void buf_sort(float bufhandle, float cmplength, float backward) = #464;
========================
*/
void VM_buf_sort (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	VM_SAFEPARMCOUNT(3, VM_buf_sort);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_buf_sort: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	if(stringbuffer->num_strings <= 0)
	{
		VM_Warning(prog, "VM_buf_sort: tried to sort empty buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	stringbuffers_sortlength = (int)PRVM_G_FLOAT(OFS_PARM1);
	if(stringbuffers_sortlength <= 0)
		stringbuffers_sortlength = 0x7FFFFFFF;

	if(!PRVM_G_FLOAT(OFS_PARM2))
		qsort(stringbuffer->strings, stringbuffer->num_strings, sizeof(char*), BufStr_SortStringsUP);
	else
		qsort(stringbuffer->strings, stringbuffer->num_strings, sizeof(char*), BufStr_SortStringsDOWN);

	BufStr_Shrink(prog, stringbuffer);
}

/*
========================
VM_buf_implode
concantenates all buffer string into one with "glue" separator and returns it as tempstring
string buf_implode(float bufhandle, string glue) = #465;
========================
*/
void VM_buf_implode (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	char k[VM_TEMPSTRING_MAXSIZE];
	size_t k_len;
	const char *sep;
	int i;
	size_t l;

	VM_SAFEPARMCOUNT(2, VM_buf_implode);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	PRVM_G_INT(OFS_RETURN) = OFS_NULL;
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_buf_implode: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	if(!stringbuffer->num_strings)
		return;
	sep = PRVM_G_STRING(OFS_PARM1);
	k[0] = '\0';
	k_len = 0;
	for(l = i = 0;i < stringbuffer->num_strings;i++)
	{
		if(stringbuffer->strings[i])
		{
			l += (i > 0 ? strlen(sep) : 0) + strlen(stringbuffer->strings[i]);
			if (l >= sizeof(k) - 1)
				break;
			dp_strlcat(k, sep, sizeof(k));
			k_len = dp_strlcat(k, stringbuffer->strings[i], sizeof(k));
		}
	}
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, k, k_len);
}

/*
========================
VM_bufstr_get
get a string from buffer, returns tempstring, dont str_unzone it!
string bufstr_get(float bufhandle, float string_index) = #465;
========================
*/
void VM_bufstr_get (prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	int				strindex;
	VM_SAFEPARMCOUNT(2, VM_bufstr_get);

	PRVM_G_INT(OFS_RETURN) = OFS_NULL;
	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_bufstr_get: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	strindex = (int)PRVM_G_FLOAT(OFS_PARM1);
	if (strindex < 0)
	{
		// VM_Warning(prog, "VM_bufstr_get: invalid string index %i\n", strindex);
		return;
	}
	if (strindex < stringbuffer->num_strings && stringbuffer->strings[strindex])
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, stringbuffer->strings[strindex], strlen(stringbuffer->strings[strindex]));
}

/*
========================
VM_bufstr_set
copies a string into selected slot of buffer
void bufstr_set(float bufhandle, float string_index, string str) = #466;
========================
*/
void VM_bufstr_set (prvm_prog_t *prog)
{
	int				strindex;
	prvm_stringbuffer_t *stringbuffer;
	const char		*news;

	VM_SAFEPARMCOUNT(3, VM_bufstr_set);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_bufstr_set: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	strindex = (int)PRVM_G_FLOAT(OFS_PARM1);
	if(strindex < 0 || strindex >= 1000000) // huge number of strings
	{
		VM_Warning(prog, "VM_bufstr_set: invalid string index %i\n", strindex);
		return;
	}

	news = PRVM_G_STRING(OFS_PARM2);
	BufStr_Set(prog, stringbuffer, strindex, news);
}

/*
========================
VM_bufstr_add
adds string to buffer in first free slot and returns its index
"order == true" means that string will be added after last "full" slot
float bufstr_add(float bufhandle, string str, float order) = #467;
========================
*/
void VM_bufstr_add (prvm_prog_t *prog)
{
	int				order, strindex;
	prvm_stringbuffer_t *stringbuffer;
	const char		*string;
	size_t			alloclen;

	VM_SAFEPARMCOUNT(3, VM_bufstr_add);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	PRVM_G_FLOAT(OFS_RETURN) = -1;
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_bufstr_add: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	if(!PRVM_G_INT(OFS_PARM1)) // NULL string
	{
		VM_Warning(prog, "VM_bufstr_add: can not add an empty string to buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	string = PRVM_G_STRING(OFS_PARM1);
	order = (int)PRVM_G_FLOAT(OFS_PARM2);
	if(order)
		strindex = stringbuffer->num_strings;
	else
		for (strindex = 0;strindex < stringbuffer->num_strings;strindex++)
			if (stringbuffer->strings[strindex] == NULL)
				break;

	BufStr_Expand(prog, stringbuffer, strindex);

	stringbuffer->num_strings = max(stringbuffer->num_strings, strindex + 1);
	alloclen = strlen(string) + 1;
	stringbuffer->strings[strindex] = (char *)Mem_Alloc(prog->progs_mempool, alloclen);
	memcpy(stringbuffer->strings[strindex], string, alloclen);

	PRVM_G_FLOAT(OFS_RETURN) = strindex;
}

/*
========================
VM_bufstr_free
delete string from buffer
void bufstr_free(float bufhandle, float string_index) = #468;
========================
*/
void VM_bufstr_free (prvm_prog_t *prog)
{
	int				i;
	prvm_stringbuffer_t	*stringbuffer;
	VM_SAFEPARMCOUNT(2, VM_bufstr_free);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_bufstr_free: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}
	i = (int)PRVM_G_FLOAT(OFS_PARM1);
	if(i < 0)
	{
		VM_Warning(prog, "VM_bufstr_free: invalid string index %i\n", i);
		return;
	}

	if (i < stringbuffer->num_strings)
	{
		if(stringbuffer->strings[i])
			Mem_Free(stringbuffer->strings[i]);
		stringbuffer->strings[i] = NULL;
	}

	BufStr_Shrink(prog, stringbuffer);
}

/*
========================
VM_buf_loadfile
load a file into string buffer, return 0 or 1
float buf_loadfile(string filename, float bufhandle) = #535;
========================
*/
void VM_buf_loadfile(prvm_prog_t *prog)
{
	size_t alloclen;
	prvm_stringbuffer_t *stringbuffer;
	char string[VM_TEMPSTRING_MAXSIZE];
	int strindex, c, end;
	const char *filename;
	char vabuf[1024];
	qfile_t *file;

	VM_SAFEPARMCOUNT(2, VM_buf_loadfile);

	// get file
	filename = PRVM_G_STRING(OFS_PARM0);
	file = FS_OpenVirtualFile(va(vabuf, sizeof(vabuf), "data/%s", filename), false);
	if (file == NULL)
		file = FS_OpenVirtualFile(va(vabuf, sizeof(vabuf), "%s", filename), false);
	if (file == NULL)
	{
		if (developer_extra.integer)
			VM_Warning(prog, "VM_buf_loadfile: failed to open file %s\n", filename);
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}

	// get string buffer
	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM1));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_buf_loadfile: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM1));
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}

	// read file (append to the end of buffer)
	strindex = stringbuffer->num_strings;
	while(1)
	{
		// read line
		end = 0;
		for (;;)
		{
			c = FS_Getc(file);
			if (c == '\r' || c == '\n' || c < 0)
				break;
			if (end < VM_TEMPSTRING_MAXSIZE - 1)
				string[end++] = c;
		}
		string[end] = 0;
		// remove \n following \r
		if (c == '\r')
		{
			c = FS_Getc(file);
			if (c != '\n')
				FS_UnGetc(file, (unsigned char)c);
		}
		// add and continue
		if (c >= 0 || end)
		{
			BufStr_Expand(prog, stringbuffer, strindex);
			stringbuffer->num_strings = max(stringbuffer->num_strings, strindex + 1);
			alloclen = strlen(string) + 1;
			stringbuffer->strings[strindex] = (char *)Mem_Alloc(prog->progs_mempool, alloclen);
			memcpy(stringbuffer->strings[strindex], string, alloclen);
			strindex = stringbuffer->num_strings;
		}
		else
			break;
	}

	// close file
	FS_Close(file);
	PRVM_G_FLOAT(OFS_RETURN) = 1;
}

/*
========================
VM_buf_writefile
writes stringbuffer to a file, returns 0 or 1
float buf_writefile(float filehandle, float bufhandle, [, float startpos, float numstrings]) = #468;
========================
*/

void VM_buf_writefile(prvm_prog_t *prog)
{
	int filenum, strindex, strnum, strlength;
	prvm_stringbuffer_t *stringbuffer;

	VM_SAFEPARMCOUNTRANGE(2, 4, VM_buf_writefile);

	// get file
	filenum = (int)PRVM_G_FLOAT(OFS_PARM0);
	if (filenum < 0 || filenum >= PRVM_MAX_OPENFILES)
	{
		VM_Warning(prog, "VM_buf_writefile: invalid file handle %i\n", filenum);
		return;
	}
	if (prog->openfiles[filenum] == NULL)
	{
		VM_Warning(prog, "VM_buf_writefile: no such file handle %i (or file has been closed)\n", filenum);
		return;
	}
	
	// get string buffer
	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM1));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_buf_writefile: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM1));
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}

	// get start and end parms
	if (prog->argc > 3)
	{
		strindex = (int)PRVM_G_FLOAT(OFS_PARM2);
		strnum = (int)PRVM_G_FLOAT(OFS_PARM3);
	}
	else if (prog->argc > 2)
	{
		strindex = (int)PRVM_G_FLOAT(OFS_PARM2);
		strnum = stringbuffer->num_strings - strindex;
	}
	else
	{
		strindex = 0;
		strnum = stringbuffer->num_strings;
	}
	if (strindex < 0 || strindex >= stringbuffer->num_strings)
	{
		VM_Warning(prog, "VM_buf_writefile: wrong start string index %i\n", strindex);
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}
	if (strnum < 0)
	{
		VM_Warning(prog, "VM_buf_writefile: wrong strings count %i\n", strnum);
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}

	// write
	while(strindex < stringbuffer->num_strings && strnum)
	{
		if (stringbuffer->strings[strindex])
		{
			if ((strlength = (int)strlen(stringbuffer->strings[strindex])))
				FS_Write(prog->openfiles[filenum], stringbuffer->strings[strindex], strlength);
			FS_Write(prog->openfiles[filenum], "\n", 1);
		}
		strindex++;
		strnum--;
	}

	PRVM_G_FLOAT(OFS_RETURN) = 1;
}

#define MATCH_AUTO     0
#define MATCH_WHOLE    1
#define MATCH_LEFT     2
#define MATCH_RIGHT    3
#define MATCH_MIDDLE   4
#define MATCH_PATTERN  5

static const char *detect_match_rule(char *pattern, int *matchrule)
{
	char *ppos, *qpos;
	int patternlength;

	patternlength = (int)strlen(pattern);
	ppos = strchr(pattern, '*');
	qpos = strchr(pattern, '?');
	// has ? - pattern
	if (qpos) 
	{
		*matchrule = MATCH_PATTERN;
		return pattern;
	}
	// has * - left, mid, right or pattern
	if (ppos)
	{
		// starts with * - may be right/mid or pattern
		if ((ppos - pattern) == 0)
		{
			ppos = strchr(pattern+1, '*');
			// *something 
			if (!ppos) 
			{
				*matchrule = MATCH_RIGHT;
				return pattern+1;
			}
			// *something*
			if ((ppos - pattern) == patternlength)
			{
				*matchrule = MATCH_MIDDLE;
				*ppos = 0;
				return pattern+1;
			}
			// *som*thing
			*matchrule = MATCH_PATTERN;
			return pattern;
		}
		// end with * - left
		if ((ppos - pattern) == patternlength)
		{
			*matchrule = MATCH_LEFT;
			*ppos = 0;
			return pattern;
		}
		// som*thing
		*matchrule = MATCH_PATTERN;
		return pattern;
	}
	// have no wildcards - whole string
	*matchrule = MATCH_WHOLE;
	return pattern;
}

// todo: support UTF8
static qbool match_rule(const char *string, int max_string, const char *pattern, int patternlength, int rule)
{
	const char *mid;

	if (rule == 1)
		return !strncmp(string, pattern, max_string) ? true : false;
	if (rule == 2)
		return !strncmp(string, pattern, patternlength) ? true : false;
	if (rule == 3)
	{
		mid = strstr(string, pattern);
		return mid && !*(mid+patternlength);
	}
	if (rule == 4)
		return strstr(string, pattern) ? true : false;
	// pattern
	return matchpattern_with_separator(string, pattern, false, "", false) ? true : false;
}

/*
========================
VM_bufstr_find
find an index of bufstring matching rule
float bufstr_find(float bufhandle, string match, float matchrule, float startpos, float step) = #468;
========================
*/

void VM_bufstr_find(prvm_prog_t *prog)
{
	prvm_stringbuffer_t *stringbuffer;
	char string[VM_TEMPSTRING_MAXSIZE];
	int matchrule, matchlen, i, step;
	const char *match;

	VM_SAFEPARMCOUNTRANGE(3, 5, VM_bufstr_find);

	PRVM_G_FLOAT(OFS_RETURN) = -1;

	// get string buffer
	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_bufstr_find: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}

	// get pattern/rule
	matchrule = (int)PRVM_G_FLOAT(OFS_PARM2);
	if (matchrule < 0 || matchrule > 5)
	{
		VM_Warning(prog, "VM_bufstr_find: invalid match rule %i\n", matchrule);
		return;
	}
	if (matchrule)
		match = PRVM_G_STRING(OFS_PARM1);
	else
	{
		dp_strlcpy(string, PRVM_G_STRING(OFS_PARM1), sizeof(string));
		match = detect_match_rule(string, &matchrule);
	}
	matchlen = (int)strlen(match);

	// find
	i = (prog->argc > 3) ? (int)PRVM_G_FLOAT(OFS_PARM3) : 0;
	step = (prog->argc > 4) ? (int)PRVM_G_FLOAT(OFS_PARM4) : 1;
	while(i < stringbuffer->num_strings)
	{
		if (stringbuffer->strings[i] && match_rule(stringbuffer->strings[i], VM_TEMPSTRING_MAXSIZE, match, matchlen, matchrule))
		{
			PRVM_G_FLOAT(OFS_RETURN) = i;
			break;
		}
		i += step;
	}
}

/*
========================
VM_matchpattern
float matchpattern(string s, string pattern, float matchrule, float startpos) = #468;
========================
*/
void VM_matchpattern(prvm_prog_t *prog)
{
	const char *s, *match;
	char string[VM_TEMPSTRING_MAXSIZE];
	int matchrule, l;

	VM_SAFEPARMCOUNTRANGE(2, 4, VM_matchpattern);

	s = PRVM_G_STRING(OFS_PARM0);

	// get pattern/rule
	matchrule = (int)PRVM_G_FLOAT(OFS_PARM2);
	if (matchrule < 0 || matchrule > 5)
	{
		VM_Warning(prog, "VM_matchpattern: invalid match rule %i\n", matchrule);
		return;
	}
	if (matchrule)
		match = PRVM_G_STRING(OFS_PARM1);
	else
	{
		dp_strlcpy(string, PRVM_G_STRING(OFS_PARM1), sizeof(string));
		match = detect_match_rule(string, &matchrule);
	}

	// offset
	l = (int)strlen(match);
	if (prog->argc > 3)
		s += max(0, min((unsigned int)PRVM_G_FLOAT(OFS_PARM3), strlen(s)-1));

	// match
	PRVM_G_FLOAT(OFS_RETURN) = match_rule(s, VM_TEMPSTRING_MAXSIZE, match, l, matchrule);
}

/*
========================
VM_buf_cvarlist
========================
*/

void VM_buf_cvarlist(prvm_prog_t *prog)
{
	cvar_t *cvar;
	const char *partial, *antipartial;
	size_t len, antilen;
	size_t alloclen;
	qbool ispattern, antiispattern;
	int n;
	prvm_stringbuffer_t	*stringbuffer;
	VM_SAFEPARMCOUNTRANGE(2, 3, VM_buf_cvarlist);

	stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, (int)PRVM_G_FLOAT(OFS_PARM0));
	if(!stringbuffer)
	{
		VM_Warning(prog, "VM_bufstr_free: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
		return;
	}

	partial = PRVM_G_STRING(OFS_PARM1);
	if(!partial)
		len = 0;
	else
		len = strlen(partial);

	if(prog->argc == 3)
		antipartial = PRVM_G_STRING(OFS_PARM2);
	else
		antipartial = NULL;
	if(!antipartial)
		antilen = 0;
	else
		antilen = strlen(antipartial);
	
	for (n = 0;n < stringbuffer->num_strings;n++)
		if (stringbuffer->strings[n])
			Mem_Free(stringbuffer->strings[n]);
	if (stringbuffer->strings)
		Mem_Free(stringbuffer->strings);
	stringbuffer->strings = NULL;

	ispattern = partial && (strchr(partial, '*') || strchr(partial, '?'));
	antiispattern = antipartial && (strchr(antipartial, '*') || strchr(antipartial, '?'));

	n = 0;
	for(cvar = prog->console_cmd->cvars->vars; cvar; cvar = cvar->next)
	{
		if(len && (ispattern ? !matchpattern_with_separator(cvar->name, partial, false, "", false) : strncmp(partial, cvar->name, len)))
			continue;

		if(antilen && (antiispattern ? matchpattern_with_separator(cvar->name, antipartial, false, "", false) : !strncmp(antipartial, cvar->name, antilen)))
			continue;

		++n;
	}

	stringbuffer->max_strings = stringbuffer->num_strings = n;
	if (stringbuffer->max_strings)
		stringbuffer->strings = (char **)Mem_Alloc(prog->progs_mempool, sizeof(stringbuffer->strings[0]) * stringbuffer->max_strings);
	
	n = 0;
	for(cvar = prog->console_cmd->cvars->vars; cvar; cvar = cvar->next)
	{
		if(len && (ispattern ? !matchpattern_with_separator(cvar->name, partial, false, "", false) : strncmp(partial, cvar->name, len)))
			continue;

		if(antilen && (antiispattern ? matchpattern_with_separator(cvar->name, antipartial, false, "", false) : !strncmp(antipartial, cvar->name, antilen)))
			continue;

		alloclen = strlen(cvar->name) + 1;
		stringbuffer->strings[n] = (char *)Mem_Alloc(prog->progs_mempool, alloclen);
		memcpy(stringbuffer->strings[n], cvar->name, alloclen);

		++n;
	}
}




//=============

/*
==============
VM_changeyaw

This was a major timewaster in progs, so it was converted to C
==============
*/
void VM_changeyaw (prvm_prog_t *prog)
{
	prvm_edict_t		*ent;
	float		ideal, current, move, speed;

	// this is called (VERY HACKISHLY) by VM_SV_MoveToGoal, so it can not use any
	// parameters because they are the parameters to VM_SV_MoveToGoal, not this
	//VM_SAFEPARMCOUNT(0, VM_changeyaw);

	ent = PRVM_PROG_TO_EDICT(PRVM_gameglobaledict(self));
	if (ent == prog->edicts)
	{
		VM_Warning(prog, "changeyaw: can not modify world entity\n");
		return;
	}
	if (ent->free)
	{
		VM_Warning(prog, "changeyaw: can not modify free entity\n");
		return;
	}
	current = PRVM_gameedictvector(ent, angles)[1];
	current = ANGLEMOD(current);
	ideal = PRVM_gameedictfloat(ent, ideal_yaw);
	speed = PRVM_gameedictfloat(ent, yaw_speed);

	if (current == ideal)
		return;
	move = ideal - current;
	if (ideal > current)
	{
		if (move >= 180)
			move = move - 360;
	}
	else
	{
		if (move <= -180)
			move = move + 360;
	}
	if (move > 0)
	{
		if (move > speed)
			move = speed;
	}
	else
	{
		if (move < -speed)
			move = -speed;
	}

	current += move;
	PRVM_gameedictvector(ent, angles)[1] = ANGLEMOD(current);
}

/*
==============
VM_changepitch
==============
*/
void VM_changepitch (prvm_prog_t *prog)
{
	prvm_edict_t		*ent;
	float		ideal, current, move, speed;

	VM_SAFEPARMCOUNT(1, VM_changepitch);

	ent = PRVM_G_EDICT(OFS_PARM0);
	if (ent == prog->edicts)
	{
		VM_Warning(prog, "changepitch: can not modify world entity\n");
		return;
	}
	if (ent->free)
	{
		VM_Warning(prog, "changepitch: can not modify free entity\n");
		return;
	}
	current = PRVM_gameedictvector(ent, angles)[0];
	current = ANGLEMOD(current);
	ideal = PRVM_gameedictfloat(ent, idealpitch);
	speed = PRVM_gameedictfloat(ent, pitch_speed);

	if (current == ideal)
		return;
	move = ideal - current;
	if (ideal > current)
	{
		if (move >= 180)
			move = move - 360;
	}
	else
	{
		if (move <= -180)
			move = move + 360;
	}
	if (move > 0)
	{
		if (move > speed)
			move = speed;
	}
	else
	{
		if (move < -speed)
			move = -speed;
	}

	current += move;
	PRVM_gameedictvector(ent, angles)[0] = ANGLEMOD(current);
}


void VM_uncolorstring (prvm_prog_t *prog)
{
	char szNewString[VM_TEMPSTRING_MAXSIZE];
	size_t szNewString_len;
	const char *szString;

	// Prepare Strings
	VM_SAFEPARMCOUNT(1, VM_uncolorstring);
	szString = PRVM_G_STRING(OFS_PARM0);
	szNewString_len = COM_StringDecolorize(szString, 0, szNewString, sizeof(szNewString), true);
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, szNewString, szNewString_len);
}

// #221 float(string str, string sub[, float startpos]) strstrofs (FTE_STRINGS)
//strstr, without generating a new string. Use in conjunction with FRIK_FILE's substring for more similar strstr.
void VM_strstrofs (prvm_prog_t *prog)
{
	const char *instr, *match;
	int firstofs;
	VM_SAFEPARMCOUNTRANGE(2, 3, VM_strstrofs);
	instr = PRVM_G_STRING(OFS_PARM0);
	match = PRVM_G_STRING(OFS_PARM1);
	firstofs = (prog->argc > 2)?(int)PRVM_G_FLOAT(OFS_PARM2):0;
	firstofs = (int)u8_bytelen(instr, firstofs);

	if (firstofs && (firstofs < 0 || firstofs > (int)strlen(instr)))
	{
		PRVM_G_FLOAT(OFS_RETURN) = -1;
		return;
	}

	match = strstr(instr+firstofs, match);
	if (!match)
		PRVM_G_FLOAT(OFS_RETURN) = -1;
	else
		PRVM_G_FLOAT(OFS_RETURN) = u8_strnlen(instr, match-instr);
}

//#222 string(string s, float index) str2chr (FTE_STRINGS)
void VM_str2chr (prvm_prog_t *prog)
{
	const char *s;
	Uchar ch;
	int index;
	VM_SAFEPARMCOUNT(2, VM_str2chr);
	s = PRVM_G_STRING(OFS_PARM0);
	index = (int)u8_bytelen(s, (int)PRVM_G_FLOAT(OFS_PARM1));

	if((unsigned)index < strlen(s))
	{
		if (utf8_enable.integer)
			ch = u8_getchar_noendptr(s + index);
		else
			ch = (unsigned char)s[index];
		PRVM_G_FLOAT(OFS_RETURN) = ch;
	}
	else
		PRVM_G_FLOAT(OFS_RETURN) = 0;
}

//#223 string(float c, ...) chr2str (FTE_STRINGS)
void VM_chr2str (prvm_prog_t *prog)
{
	/*
	char	t[9];
	int		i;
	VM_SAFEPARMCOUNTRANGE(0, 8, VM_chr2str);
	for(i = 0;i < prog->argc && i < (int)sizeof(t) - 1;i++)
		t[i] = (unsigned char)PRVM_G_FLOAT(OFS_PARM0+i*3);
	t[i] = 0;
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, t);
	*/
	char t[9 * 4 + 1];
	int i;
	size_t len = 0;

	VM_SAFEPARMCOUNTRANGE(0, 8, VM_chr2str);
	for(i = 0; i < prog->argc && len < sizeof(t)-1; ++i)
		len += u8_fromchar((Uchar)PRVM_G_FLOAT(OFS_PARM0+i*3), t + len, sizeof(t)-1);
	t[len] = '\0';
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, t, len);
}

static int chrconv_number(int i, int base, int conv)
{
	i -= base;
	switch (conv)
	{
	default:
	case 5:
	case 6:
	case 0:
		break;
	case 1:
		base = '0';
		break;
	case 2:
		base = '0'+128;
		break;
	case 3:
		base = '0'-30;
		break;
	case 4:
		base = '0'+128-30;
		break;
	}
	return i + base;
}
static int chrconv_punct(int i, int base, int conv)
{
	i -= base;
	switch (conv)
	{
	default:
	case 0:
		break;
	case 1:
		base = 0;
		break;
	case 2:
		base = 128;
		break;
	}
	return i + base;
}

static int chrchar_alpha(int i, int basec, int baset, int convc, int convt, int charnum)
{
	//convert case and colour seperatly...

	i -= baset + basec;
	switch (convt)
	{
	default:
	case 0:
		break;
	case 1:
		baset = 0;
		break;
	case 2:
		baset = 128;
		break;

	case 5:
	case 6:
		baset = 128*((charnum&1) == (convt-5));
		break;
	}

	switch (convc)
	{
	default:
	case 0:
		break;
	case 1:
		basec = 'a';
		break;
	case 2:
		basec = 'A';
		break;
	}
	return i + basec + baset;
}
// #224 string(float ccase, float calpha, float cnum, string s, ...) strconv (FTE_STRINGS)
//bulk convert a string. change case or colouring.
void VM_strconv (prvm_prog_t *prog)
{
	int ccase, redalpha, rednum;
	unsigned i;
	size_t resbuf_len;
	unsigned char resbuf[VM_TEMPSTRING_MAXSIZE];
	unsigned char *result = resbuf;

	VM_SAFEPARMCOUNTRANGE(3, 8, VM_strconv);

	ccase = (int) PRVM_G_FLOAT(OFS_PARM0);	//0 same, 1 lower, 2 upper
	redalpha = (int) PRVM_G_FLOAT(OFS_PARM1);	//0 same, 1 white, 2 red,  5 alternate, 6 alternate-alternate
	rednum = (int) PRVM_G_FLOAT(OFS_PARM2);	//0 same, 1 white, 2 red, 3 redspecial, 4 whitespecial, 5 alternate, 6 alternate-alternate
	resbuf_len = VM_VarString(prog, 3, (char *) resbuf, sizeof(resbuf));

	for (i = 0; i < resbuf_len; i++, result++)	//should this be done backwards?
	{
		if (*result >= '0' && *result <= '9')	//normal numbers...
			*result = chrconv_number(*result, '0', rednum);
		else if (*result >= '0'+128 && *result <= '9'+128)
			*result = chrconv_number(*result, '0'+128, rednum);
		else if (*result >= '0'+128-30 && *result <= '9'+128-30)
			*result = chrconv_number(*result, '0'+128-30, rednum);
		else if (*result >= '0'-30 && *result <= '9'-30)
			*result = chrconv_number(*result, '0'-30, rednum);

		else if (*result >= 'a' && *result <= 'z')	//normal numbers...
			*result = chrchar_alpha(*result, 'a', 0, ccase, redalpha, i);
		else if (*result >= 'A' && *result <= 'Z')	//normal numbers...
			*result = chrchar_alpha(*result, 'A', 0, ccase, redalpha, i);
		else if (*result >= 'a'+128 && *result <= 'z'+128)	//normal numbers...
			*result = chrchar_alpha(*result, 'a', 128, ccase, redalpha, i);
		else if (*result >= 'A'+128 && *result <= 'Z'+128)	//normal numbers...
			*result = chrchar_alpha(*result, 'A', 128, ccase, redalpha, i);

		else if ((*result & 127) < 16 || !redalpha)	//special chars..
			*result = *result;
		else if (*result < 128)
			*result = chrconv_punct(*result, 0, redalpha);
		else
			*result = chrconv_punct(*result, 128, redalpha);
	}
	*result = '\0';

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, (char *)resbuf, result - resbuf);
}

// #225 string(float chars, string s, ...) strpad (FTE_STRINGS)
void VM_strpad (prvm_prog_t *prog)
{
	char src[VM_TEMPSTRING_MAXSIZE];
	char destbuf[VM_TEMPSTRING_MAXSIZE];
	size_t destbuf_len;
	int pad;

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_strpad);
	pad = (int) PRVM_G_FLOAT(OFS_PARM0);
	VM_VarString(prog, 1, src, sizeof(src));

	// note: < 0 = left padding, > 0 = right padding,
	// this is reverse logic of printf!
	destbuf_len = dpsnprintf(destbuf, sizeof(destbuf), "%*s", -pad, src);

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, destbuf, destbuf_len);
}

// #226 string(string info, string key, string value, ...) infoadd (FTE_STRINGS)
//uses qw style \key\value strings
void VM_infoadd (prvm_prog_t *prog)
{
	const char *info, *key;
	char value[VM_TEMPSTRING_MAXSIZE];
	char temp[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNTRANGE(2, 8, VM_infoadd);
	info = PRVM_G_STRING(OFS_PARM0);
	key = PRVM_G_STRING(OFS_PARM1);
	VM_VarString(prog, 2, value, sizeof(value));

	dp_strlcpy(temp, info, VM_TEMPSTRING_MAXSIZE);

	InfoString_SetValue(temp, VM_TEMPSTRING_MAXSIZE, key, value);

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, temp, strlen(temp));
}

// #227 string(string info, string key) infoget (FTE_STRINGS)
//uses qw style \key\value strings
void VM_infoget (prvm_prog_t *prog)
{
	const char *info;
	const char *key;
	char value[VM_TEMPSTRING_MAXSIZE];

	VM_SAFEPARMCOUNT(2, VM_infoget);
	info = PRVM_G_STRING(OFS_PARM0);
	key = PRVM_G_STRING(OFS_PARM1);

	InfoString_GetValue(info, key, value, VM_TEMPSTRING_MAXSIZE);

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, value, strlen(value));
}

//#228 float(string s1, string s2, float len) strncmp (FTE_STRINGS)
// also float(string s1, string s2) strcmp (FRIK_FILE)
void VM_strncmp (prvm_prog_t *prog)
{
	const char *s1, *s2;
	VM_SAFEPARMCOUNTRANGE(2, 3, VM_strncmp);
	s1 = PRVM_G_STRING(OFS_PARM0);
	s2 = PRVM_G_STRING(OFS_PARM1);
	if (prog->argc > 2)
	{
		PRVM_G_FLOAT(OFS_RETURN) = strncmp(s1, s2, (size_t)PRVM_G_FLOAT(OFS_PARM2));
	}
	else
	{
		PRVM_G_FLOAT(OFS_RETURN) = strcmp(s1, s2);
	}
}

// #229 float(string s1, string s2) strcasecmp (FTE_STRINGS)
// #230 float(string s1, string s2, float len) strncasecmp (FTE_STRINGS)
void VM_strncasecmp (prvm_prog_t *prog)
{
	const char *s1, *s2;
	VM_SAFEPARMCOUNTRANGE(2, 3, VM_strncasecmp);
	s1 = PRVM_G_STRING(OFS_PARM0);
	s2 = PRVM_G_STRING(OFS_PARM1);
	if (prog->argc > 2)
	{
		PRVM_G_FLOAT(OFS_RETURN) = strncasecmp(s1, s2, (size_t)PRVM_G_FLOAT(OFS_PARM2));
	}
	else
	{
		PRVM_G_FLOAT(OFS_RETURN) = strcasecmp(s1, s2);
	}
}

// #494 float(float caseinsensitive, string s, ...) crc16
void VM_crc16(prvm_prog_t *prog)
{
	float insensitive;
	char s[VM_TEMPSTRING_MAXSIZE];
	size_t slen;

	VM_SAFEPARMCOUNTRANGE(2, 8, VM_crc16);
	insensitive = PRVM_G_FLOAT(OFS_PARM0);
	slen = VM_VarString(prog, 1, s, sizeof(s));
	PRVM_G_FLOAT(OFS_RETURN) = (unsigned short) ((insensitive ? CRC_Block_CaseInsensitive : CRC_Block) ((unsigned char *) s, slen));
}

// #639 float(string digest, string data, ...) digest_hex
void VM_digest_hex(prvm_prog_t *prog)
{
	const char *digest;

	char out[32];
	char outhex[65];
	int outlen;

	char s[VM_TEMPSTRING_MAXSIZE];
	size_t len;

	VM_SAFEPARMCOUNTRANGE(2, 8, VM_digest_hex);
	digest = PRVM_G_STRING(OFS_PARM0);
	if(!digest)
		digest = "";
	len = VM_VarString(prog, 1, s, sizeof(s));

	outlen = 0;

	if(!strcmp(digest, "MD4"))
	{
		outlen = 16;
		mdfour((unsigned char *) out, (unsigned char *) s, len);
	}
	else if(!strcmp(digest, "SHA256") && Crypto_Available())
	{
		outlen = 32;
		sha256((unsigned char *) out, (unsigned char *) s, len);
	}
	// no warning needed on mismatch - we return string_null to QC

	if(outlen)
	{
		int i;
		static const char *hexmap = "0123456789abcdef";
		for(i = 0; i < outlen; ++i)
		{
			outhex[2*i]   = hexmap[(out[i] >> 4) & 15];
			outhex[2*i+1] = hexmap[(out[i] >> 0) & 15];
		}
		outhex[2*i] = '\0';
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, outhex, 2*i);
	}
	else
		PRVM_G_INT(OFS_RETURN) = 0;
}

void VM_wasfreed (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(1, VM_wasfreed);
	PRVM_G_FLOAT(OFS_RETURN) = PRVM_G_EDICT(OFS_PARM0)->free;
}

void VM_SetTraceGlobals(prvm_prog_t *prog, const trace_t *trace)
{
	PRVM_gameglobalfloat(trace_allsolid) = trace->allsolid;
	PRVM_gameglobalfloat(trace_startsolid) = trace->startsolid;
	PRVM_gameglobalfloat(trace_fraction) = trace->fraction;
	PRVM_gameglobalfloat(trace_inwater) = trace->inwater;
	PRVM_gameglobalfloat(trace_inopen) = trace->inopen;
	VectorCopy(trace->endpos, PRVM_gameglobalvector(trace_endpos));
	VectorCopy(trace->plane.normal, PRVM_gameglobalvector(trace_plane_normal));
	PRVM_gameglobalfloat(trace_plane_dist) = trace->plane.dist;
	PRVM_gameglobaledict(trace_ent) = PRVM_EDICT_TO_PROG(trace->ent ? trace->ent : prog->edicts);
	PRVM_gameglobalfloat(trace_dpstartcontents) = trace->startsupercontents;
	PRVM_gameglobalfloat(trace_dphitcontents) = trace->hitsupercontents;
	PRVM_gameglobalfloat(trace_dphitq3surfaceflags) = trace->hitq3surfaceflags;
	PRVM_gameglobalstring(trace_dphittexturename) = trace->hittexture ? PRVM_SetTempString(prog, trace->hittexture->name, strlen(trace->hittexture->name)) : 0;
}

void VM_ClearTraceGlobals(prvm_prog_t *prog)
{
	// clean up all trace globals when leaving the VM (anti-triggerbot safeguard)
	PRVM_gameglobalfloat(trace_allsolid) = 0;
	PRVM_gameglobalfloat(trace_startsolid) = 0;
	PRVM_gameglobalfloat(trace_fraction) = 0;
	PRVM_gameglobalfloat(trace_inwater) = 0;
	PRVM_gameglobalfloat(trace_inopen) = 0;
	VectorClear(PRVM_gameglobalvector(trace_endpos));
	VectorClear(PRVM_gameglobalvector(trace_plane_normal));
	PRVM_gameglobalfloat(trace_plane_dist) = 0;
	PRVM_gameglobaledict(trace_ent) = PRVM_EDICT_TO_PROG(prog->edicts);
	PRVM_gameglobalfloat(trace_dpstartcontents) = 0;
	PRVM_gameglobalfloat(trace_dphitcontents) = 0;
	PRVM_gameglobalfloat(trace_dphitq3surfaceflags) = 0;
	PRVM_gameglobalstring(trace_dphittexturename) = 0;
}

//=============

void VM_Cmd_Init(prvm_prog_t *prog)
{
	// only init the stuff for the current prog
	VM_Files_Init(prog);
	VM_Search_Init(prog);
}

static void animatemodel_reset(prvm_prog_t *prog);

void VM_Cmd_Reset(prvm_prog_t *prog)
{
	CL_PurgeOwner( MENUOWNER );
	VM_Search_Reset(prog);
	VM_Files_CloseAll(prog);
	animatemodel_reset(prog);
}

// #510 string(string input, ...) uri_escape (DP_QC_URI_ESCAPE)
// does URI escaping on a string (replace evil stuff by %AB escapes)
void VM_uri_escape (prvm_prog_t *prog)
{
	char src[VM_TEMPSTRING_MAXSIZE];
	char dest[VM_TEMPSTRING_MAXSIZE];
	char *p, *q;
	static const char *hex = "0123456789ABCDEF";

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_uri_escape);
	VM_VarString(prog, 0, src, sizeof(src));

	for(p = src, q = dest; *p && q < dest + sizeof(dest) - 3; ++p)
	{
		if((*p >= 'A' && *p <= 'Z')
			|| (*p >= 'a' && *p <= 'z')
			|| (*p >= '0' && *p <= '9')
			|| (*p == '-')  || (*p == '_') || (*p == '.')
			|| (*p == '!')  || (*p == '~')
			|| (*p == '\'') || (*p == '(') || (*p == ')'))
			*q++ = *p;
		else
		{
			*q++ = '%';
			*q++ = hex[(*(unsigned char *)p >> 4) & 0xF];
			*q++ = hex[ *(unsigned char *)p       & 0xF];
		}
	}
	*q = '\0';

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, dest, q - dest);
}

// #510 string(string input, ...) uri_unescape (DP_QC_URI_ESCAPE)
// does URI unescaping on a string (get back the evil stuff)
void VM_uri_unescape (prvm_prog_t *prog)
{
	char src[VM_TEMPSTRING_MAXSIZE];
	char dest[VM_TEMPSTRING_MAXSIZE];
	char *p, *q;
	int hi, lo;

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_uri_unescape);
	VM_VarString(prog, 0, src, sizeof(src));

	for(p = src, q = dest; *p; ) // no need to check size, because unescape can't expand
	{
		if(*p == '%')
		{
			if(p[1] >= '0' && p[1] <= '9')
				hi = p[1] - '0';
			else if(p[1] >= 'a' && p[1] <= 'f')
				hi = p[1] - 'a' + 10;
			else if(p[1] >= 'A' && p[1] <= 'F')
				hi = p[1] - 'A' + 10;
			else
				goto nohex;
			if(p[2] >= '0' && p[2] <= '9')
				lo = p[2] - '0';
			else if(p[2] >= 'a' && p[2] <= 'f')
				lo = p[2] - 'a' + 10;
			else if(p[2] >= 'A' && p[2] <= 'F')
				lo = p[2] - 'A' + 10;
			else
				goto nohex;
			if(hi != 0 || lo != 0) // don't unescape NUL bytes
				*q++ = (char) (hi * 0x10 + lo);
			p += 3;
			continue;
		}

nohex:
		// otherwise:
		*q++ = *p++;
	}
	*q = '\0';

	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, dest, q - dest);
}

// #502 string(string filename) whichpack (DP_QC_WHICHPACK)
// returns the name of the pack containing a file, or "" if it is not in any pack (but local or non-existant)
void VM_whichpack (prvm_prog_t *prog)
{
	const char *fn, *pack;

	VM_SAFEPARMCOUNT(1, VM_whichpack);
	fn = PRVM_G_STRING(OFS_PARM0);
	pack = FS_WhichPack(fn);

	PRVM_G_INT(OFS_RETURN) = pack ? PRVM_SetTempString(prog, pack, strlen(pack)) : 0;
}

typedef struct
{
	prvm_prog_t *prog;
	double starttime;
	float id;
	char buffer[MAX_INPUTLINE];
	char posttype[128];
	unsigned char *postdata; // free when uri_to_prog_t is freed
	size_t postlen;
	char *sigdata; // free when uri_to_prog_t is freed
	size_t siglen;
}
uri_to_prog_t;

static void uri_to_string_callback(int status, size_t length_received, unsigned char *buffer, void *cbdata)
{
	prvm_prog_t *prog;
	uri_to_prog_t *handle = (uri_to_prog_t *) cbdata;

	prog = handle->prog;
	if(!prog->loaded)
	{
		// curl reply came too late... so just drop it
		if(handle->postdata)
			Z_Free(handle->postdata);
		if(handle->sigdata)
			Z_Free(handle->sigdata);
		Z_Free(handle);
		return;
	}

	if((prog->starttime == handle->starttime) && (PRVM_allfunction(URI_Get_Callback)))
	{
		if(length_received >= sizeof(handle->buffer))
			length_received = sizeof(handle->buffer) - 1;
		handle->buffer[length_received] = '\0';

		PRVM_G_FLOAT(OFS_PARM0) = handle->id;
		PRVM_G_FLOAT(OFS_PARM1) = status;
		PRVM_G_INT(OFS_PARM2) = PRVM_SetTempString(prog, handle->buffer, length_received);
		prog->ExecuteProgram(prog, PRVM_allfunction(URI_Get_Callback), "QC function URI_Get_Callback is missing");
	}

	if(handle->postdata)
		Z_Free(handle->postdata);
	if(handle->sigdata)
		Z_Free(handle->sigdata);
	Z_Free(handle);
}

// uri_get() gets content from an URL and calls a callback "uri_get_callback" with it set as string; an unique ID of the transfer is returned
// returns 1 on success, and then calls the callback with the ID, 0 or the HTTP status code, and the received data in a string
void VM_uri_get (prvm_prog_t *prog)
{
	const char *url;
	float id;
	qbool ret;
	uri_to_prog_t *handle;
	const char *posttype = NULL;
	const char *postseparator = NULL;
	int poststringbuffer = -1;
	int postkeyid = -1;
	const char *query_string = NULL;
	size_t lq;

	if(!PRVM_allfunction(URI_Get_Callback))
		prog->error_cmd("uri_get called by %s without URI_Get_Callback defined", prog->name);

	VM_SAFEPARMCOUNTRANGE(2, 6, VM_uri_get);

	url = PRVM_G_STRING(OFS_PARM0);
	id = PRVM_G_FLOAT(OFS_PARM1);
	if(prog->argc >= 3)
		posttype = PRVM_G_STRING(OFS_PARM2);
	if(prog->argc >= 4)
		postseparator = PRVM_G_STRING(OFS_PARM3);
	if(prog->argc >= 5)
		poststringbuffer = PRVM_G_FLOAT(OFS_PARM4);
	if(prog->argc >= 6)
		postkeyid = PRVM_G_FLOAT(OFS_PARM5);
	handle = (uri_to_prog_t *) Z_Malloc(sizeof(*handle)); // this can't be the prog's mem pool, as curl may call the callback later!

	query_string = strchr(url, '?');
	if(query_string)
		++query_string;
	lq = query_string ? strlen(query_string) : 0;

	handle->prog = prog;
	handle->starttime = prog->starttime;
	handle->id = id;
	if(postseparator && posttype && *posttype)
	{
		size_t l = strlen(postseparator);
		if(poststringbuffer >= 0)
		{
			size_t ltotal;
			int i;
			// "implode"
			prvm_stringbuffer_t *stringbuffer;
			stringbuffer = (prvm_stringbuffer_t *)Mem_ExpandableArray_RecordAtIndex(&prog->stringbuffersarray, poststringbuffer);
			if(!stringbuffer)
			{
				VM_Warning(prog, "uri_get: invalid buffer %i\n", (int)PRVM_G_FLOAT(OFS_PARM0));
				return;
			}
			ltotal = 0;
			for(i = 0;i < stringbuffer->num_strings;i++)
			{
				if(i > 0)
					ltotal += l;
				if(stringbuffer->strings[i])
					ltotal += strlen(stringbuffer->strings[i]);
			}
			handle->postdata = (unsigned char *)Z_Malloc(ltotal + 1 + lq);
			handle->postlen = ltotal;
			ltotal = 0;
			for(i = 0;i < stringbuffer->num_strings;i++)
			{
				if(i > 0)
				{
					memcpy(handle->postdata + ltotal, postseparator, l);
					ltotal += l;
				}
				if(stringbuffer->strings[i])
				{
					memcpy(handle->postdata + ltotal, stringbuffer->strings[i], strlen(stringbuffer->strings[i]));
					ltotal += strlen(stringbuffer->strings[i]);
				}
			}
			if(ltotal != handle->postlen)
				prog->error_cmd("%s: string buffer content size mismatch, possible overrun", prog->name);
		}
		else
		{
			handle->postdata = (unsigned char *)Z_Malloc(l + 1 + lq);
			handle->postlen = l;
			memcpy(handle->postdata, postseparator, l);
		}
		handle->postdata[handle->postlen] = 0;
		if(query_string)
			memcpy(handle->postdata + handle->postlen + 1, query_string, lq);
		if(postkeyid >= 0)
		{
			// POST: we sign postdata \0 query string
			size_t ll;
			handle->sigdata = (char *)Z_Malloc(8192);
			dp_strlcpy(handle->sigdata, "X-D0-Blind-ID-Detached-Signature: ", 8192);
			l = strlen(handle->sigdata);
			handle->siglen = Crypto_SignDataDetached(handle->postdata, handle->postlen + 1 + lq, postkeyid, handle->sigdata + l, 8192 - l);
			if(!handle->siglen)
			{
				Z_Free(handle->sigdata);
				handle->sigdata = NULL;
				goto out1;
			}
			ll = base64_encode((unsigned char *) (handle->sigdata + l), handle->siglen, 8192 - l - 1);
			if(!ll)
			{
				Z_Free(handle->sigdata);
				handle->sigdata = NULL;
				goto out1;
			}
			handle->siglen = l + ll;
			handle->sigdata[handle->siglen] = 0;
		}
out1:
		dp_strlcpy(handle->posttype, posttype, sizeof(handle->posttype));
		ret = Curl_Begin_ToMemory_POST(url, handle->sigdata, 0, handle->posttype, handle->postdata, handle->postlen, (unsigned char *) handle->buffer, sizeof(handle->buffer), uri_to_string_callback, handle);
	}
	else
	{
		if(postkeyid >= 0 && query_string)
		{
			// GET: we sign JUST the query string
			size_t l, ll;
			handle->sigdata = (char *)Z_Malloc(8192);
			dp_strlcpy(handle->sigdata, "X-D0-Blind-ID-Detached-Signature: ", 8192);
			l = strlen(handle->sigdata);
			handle->siglen = Crypto_SignDataDetached(query_string, lq, postkeyid, handle->sigdata + l, 8192 - l);
			if(!handle->siglen)
			{
				Z_Free(handle->sigdata);
				handle->sigdata = NULL;
				goto out2;
			}
			ll = base64_encode((unsigned char *) (handle->sigdata + l), handle->siglen, 8192 - l - 1);
			if(!ll)
			{
				Z_Free(handle->sigdata);
				handle->sigdata = NULL;
				goto out2;
			}
			handle->siglen = l + ll;
			handle->sigdata[handle->siglen] = 0;
		}
out2:
		handle->postdata = NULL;
		handle->postlen = 0;
		ret = Curl_Begin_ToMemory_POST(url, handle->sigdata, 0, NULL, NULL, 0, (unsigned char *) handle->buffer, sizeof(handle->buffer), uri_to_string_callback, handle);
	}
	if(ret)
	{
		PRVM_G_INT(OFS_RETURN) = 1;
	}
	else
	{
		if(handle->postdata)
			Z_Free(handle->postdata);
		if(handle->sigdata)
			Z_Free(handle->sigdata);
		Z_Free(handle);
		PRVM_G_INT(OFS_RETURN) = 0;
	}
}

void VM_netaddress_resolve (prvm_prog_t *prog)
{
	const char *ip;
	char normalized[128];
	size_t normalized_len;
	int port;
	lhnetaddress_t addr;

	VM_SAFEPARMCOUNTRANGE(1, 2, VM_netaddress_resolve);

	ip = PRVM_G_STRING(OFS_PARM0);
	port = 0;
	if(prog->argc > 1)
		port = (int) PRVM_G_FLOAT(OFS_PARM1);

	if(LHNETADDRESS_FromString(&addr, ip, port) && (normalized_len = LHNETADDRESS_ToString(&addr, normalized, sizeof(normalized), prog->argc > 1)))
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, normalized, normalized_len);
	else
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, "", 0);
}

//string(prvm_prog_t *prog) getextresponse = #624; // returns the next extResponse packet that was sent to this client
void VM_CL_getextresponse (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_argv);

	if (cl_net_extresponse_count <= 0)
		PRVM_G_INT(OFS_RETURN) = OFS_NULL;
	else
	{
		int first;
		--cl_net_extresponse_count;
		first = (cl_net_extresponse_last + NET_EXTRESPONSE_MAX - cl_net_extresponse_count) % NET_EXTRESPONSE_MAX;
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, cl_net_extresponse[first], strlen(cl_net_extresponse[first]));
	}
}

void VM_SV_getextresponse (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0,VM_argv);

	if (sv_net_extresponse_count <= 0)
		PRVM_G_INT(OFS_RETURN) = OFS_NULL;
	else
	{
		int first;
		--sv_net_extresponse_count;
		first = (sv_net_extresponse_last + NET_EXTRESPONSE_MAX - sv_net_extresponse_count) % NET_EXTRESPONSE_MAX;
		PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, sv_net_extresponse[first], strlen(sv_net_extresponse[first]));
	}
}

// DP_QC_NUDGEOUTOFSOLID
// float(entity ent) nudgeoutofsolid = #567;
void VM_nudgeoutofsolid(prvm_prog_t *prog)
{
	prvm_edict_t *ent;

	VM_SAFEPARMCOUNTRANGE(1, 1, VM_nudgeoutofsolid);

	ent = PRVM_G_EDICT(OFS_PARM0);
	if (ent == prog->edicts)
	{
		VM_Warning(prog, "nudgeoutofsolid: can not modify world entity\n");
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}
	if (ent->free)
	{
		VM_Warning(prog, "nudgeoutofsolid: can not modify free entity\n");
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}

	PRVM_G_FLOAT(OFS_RETURN) = PHYS_NudgeOutOfSolid(prog, ent);

	if (PRVM_G_FLOAT(OFS_RETURN) > 0)
	{
		if (prog == SVVM_prog)
			SV_LinkEdict(ent);
		else if (prog == CLVM_prog)
			CL_LinkEdict(ent);
		else
			Sys_Error("PHYS_NudgeOutOfSolid: cannot be called from %s VM\n", prog->name);
	}
}

/*
=========
Common functions between menu.dat and clsprogs
=========
*/

//#349 float() isdemo 
void VM_CL_isdemo (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0, VM_CL_isdemo);
	PRVM_G_FLOAT(OFS_RETURN) = cls.demoplayback;
}

//#355 float() videoplaying 
void VM_CL_videoplaying (prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0, VM_CL_videoplaying);
	PRVM_G_FLOAT(OFS_RETURN) = cl_videoplaying;
}

/*
=========
VM_M_callfunction

	callfunction(...,string function_name)
Extension: pass
=========
*/
void VM_callfunction(prvm_prog_t *prog)
{
	mfunction_t *func;
	const char *s;

	VM_SAFEPARMCOUNTRANGE(1, 8, VM_callfunction);

	s = PRVM_G_STRING(OFS_PARM0+(prog->argc - 1)*3);

	VM_CheckEmptyString(prog, s);

	func = PRVM_ED_FindFunction(prog, s);

	if(!func)
		prog->error_cmd("VM_callfunction: function %s not found !", s);
	else if (func->first_statement < 0)
	{
		// negative statements are built in functions
		int builtinnumber = -func->first_statement;
		prog->xfunction->builtinsprofile++;
		if (builtinnumber < prog->numbuiltins && prog->builtins[builtinnumber])
			prog->builtins[builtinnumber](prog);
		else
			prog->error_cmd("No such builtin #%i in %s; most likely cause: outdated engine build. Try updating!", builtinnumber, prog->name);
	}
	else if(func - prog->functions > 0)
	{
		prog->argc--;
		prog->ExecuteProgram(prog, func - prog->functions,"");
		prog->argc++;
	}
}

/*
=========
VM_isfunction

float	isfunction(string function_name)
=========
*/
void VM_isfunction(prvm_prog_t *prog)
{
	mfunction_t *func;
	const char *s;

	VM_SAFEPARMCOUNT(1, VM_isfunction);

	s = PRVM_G_STRING(OFS_PARM0);

	VM_CheckEmptyString(prog, s);

	func = PRVM_ED_FindFunction(prog, s);

	if(!func)
		PRVM_G_FLOAT(OFS_RETURN) = false;
	else
		PRVM_G_FLOAT(OFS_RETURN) = true;
}

/*
=========
VM_sprintf

string sprintf(string format, ...)
=========
*/

void VM_sprintf(prvm_prog_t *prog)
{
	const char *s, *s0;
	char outbuf[MAX_INPUTLINE];
	char *o = outbuf, *end = outbuf + sizeof(outbuf), *err;
	const char *p;
	int argpos = 1;
	int width, precision, thisarg, flags;
	char formatbuf[16];
	char *f;
	int isfloat;
	static prvm_int_t dummyivec[3] = {0, 0, 0};
	static prvm_vec_t dummyvec[3] = {0, 0, 0};
	char vabuf[1024];

#define PRINTF_ALTERNATE 1
#define PRINTF_ZEROPAD 2
#define PRINTF_LEFT 4
#define PRINTF_SPACEPOSITIVE 8
#define PRINTF_SIGNPOSITIVE 16

	formatbuf[0] = '%';

	s = PRVM_G_STRING(OFS_PARM0);

#define GETARG_FLOAT(a) (((a)>=1 && (a)<prog->argc) ? (PRVM_G_FLOAT(OFS_PARM0 + 3 * (a))) : 0)
#define GETARG_VECTOR(a) (((a)>=1 && (a)<prog->argc) ? (PRVM_G_VECTOR(OFS_PARM0 + 3 * (a))) : dummyvec)
#define GETARG_INT(a) (((a)>=1 && (a)<prog->argc) ? (PRVM_G_INT(OFS_PARM0 + 3 * (a))) : 0)
#define GETARG_INTVECTOR(a) (((a)>=1 && (a)<prog->argc) ? ((prvm_int_t*) PRVM_G_VECTOR(OFS_PARM0 + 3 * (a))) : dummyivec)
#define GETARG_STRING(a) (((a)>=1 && (a)<prog->argc) ? (PRVM_G_STRING(OFS_PARM0 + 3 * (a))) : "")

	for(;;)
	{
		s0 = s;
		switch(*s)
		{
			case 0:
				goto finished;
			case '%':
				++s;

				if(*s == '%')
					goto verbatim;

				// complete directive format:
				// %3$*1$.*2$ld
				
				width = -1;
				precision = -1;
				thisarg = -1;
				flags = 0;
				isfloat = -1;

				// is number following?
				if(*s >= '0' && *s <= '9')
				{
					width = strtol(s, &err, 10);
					if(!err)
					{
						VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
						goto finished;
					}
					if(*err == '$')
					{
						thisarg = width;
						width = -1;
						s = err + 1;
					}
					else
					{
						if(*s == '0')
						{
							flags |= PRINTF_ZEROPAD;
							if(width == 0)
								width = -1; // it was just a flag
						}
						s = err;
					}
				}

				if(width < 0)
				{
					for(;;)
					{
						switch(*s)
						{
							case '#': flags |= PRINTF_ALTERNATE; break;
							case '0': flags |= PRINTF_ZEROPAD; break;
							case '-': flags |= PRINTF_LEFT; break;
							case ' ': flags |= PRINTF_SPACEPOSITIVE; break;
							case '+': flags |= PRINTF_SIGNPOSITIVE; break;
							default:
								goto noflags;
						}
						++s;
					}
noflags:
					if(*s == '*')
					{
						++s;
						if(*s >= '0' && *s <= '9')
						{
							width = strtol(s, &err, 10);
							if(!err || *err != '$')
							{
								VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
								goto finished;
							}
							s = err + 1;
						}
						else
							width = argpos++;
						width = GETARG_FLOAT(width);
						if(width < 0)
						{
							flags |= PRINTF_LEFT;
							width = -width;
						}
					}
					else if(*s >= '0' && *s <= '9')
					{
						width = strtol(s, &err, 10);
						if(!err)
						{
							VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
							goto finished;
						}
						s = err;
						if(width < 0)
						{
							flags |= PRINTF_LEFT;
							width = -width;
						}
					}
					// otherwise width stays -1
				}

				if(*s == '.')
				{
					++s;
					if(*s == '*')
					{
						++s;
						if(*s >= '0' && *s <= '9')
						{
							precision = strtol(s, &err, 10);
							if(!err || *err != '$')
							{
								VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
								goto finished;
							}
							s = err + 1;
						}
						else
							precision = argpos++;
						precision = GETARG_FLOAT(precision);
					}
					else if(*s >= '0' && *s <= '9')
					{
						precision = strtol(s, &err, 10);
						if(!err)
						{
							VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
							goto finished;
						}
						s = err;
					}
					else
					{
						VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
						goto finished;
					}
				}

				for(;;)
				{
					switch(*s)
					{
						case 'h': isfloat = 1; break;
						case 'l': isfloat = 0; break;
						case 'L': isfloat = 0; break;
						case 'j': break;
						case 'z': break;
						case 't': break;
						default:
							goto nolength;
					}
					++s;
				}
nolength:

				// now s points to the final directive char and is no longer changed
				if(isfloat < 0)
				{
					if(*s == 'i')
						isfloat = 0;
					else
						isfloat = 1;
				}

				if(thisarg < 0)
					thisarg = argpos++;

				if(o < end - 1)
				{
					f = &formatbuf[1];
					if(*s != 's' && *s != 'c')
						if(flags & PRINTF_ALTERNATE) *f++ = '#';
					if(flags & PRINTF_ZEROPAD) *f++ = '0';
					if(flags & PRINTF_LEFT) *f++ = '-';
					if(flags & PRINTF_SPACEPOSITIVE) *f++ = ' ';
					if(flags & PRINTF_SIGNPOSITIVE) *f++ = '+';
					*f++ = '*';
					if(precision >= 0)
					{
						*f++ = '.';
						*f++ = '*';
					}
					if(*s == 'd' || *s == 'i' || *s == 'o' || *s == 'u' || *s == 'x' || *s == 'X')
					{
						// make it use a good integer type
						for(p = INT_LOSSLESS_FORMAT_SIZE; *p; )
							*f++ = *p++;
					}
					*f++ = *s;
					*f++ = 0;

					if(width < 0) // not set
						width = 0;

					switch(*s)
					{
						case 'd': case 'i':
							if(precision < 0) // not set
								o += dpsnprintf(o, end - o, formatbuf, width, (isfloat ? INT_LOSSLESS_FORMAT_CONVERT_S(GETARG_FLOAT(thisarg)) : INT_LOSSLESS_FORMAT_CONVERT_S(GETARG_INT(thisarg))));
							else
								o += dpsnprintf(o, end - o, formatbuf, width, precision, (isfloat ? INT_LOSSLESS_FORMAT_CONVERT_S(GETARG_FLOAT(thisarg)) : INT_LOSSLESS_FORMAT_CONVERT_S(GETARG_INT(thisarg))));
							break;
						case 'o': case 'u': case 'x': case 'X':
							if(precision < 0) // not set
								o += dpsnprintf(o, end - o, formatbuf, width, (isfloat ? INT_LOSSLESS_FORMAT_CONVERT_U(GETARG_FLOAT(thisarg)) : INT_LOSSLESS_FORMAT_CONVERT_U(GETARG_INT(thisarg))));
							else
								o += dpsnprintf(o, end - o, formatbuf, width, precision, (isfloat ? INT_LOSSLESS_FORMAT_CONVERT_U(GETARG_FLOAT(thisarg)) : INT_LOSSLESS_FORMAT_CONVERT_U(GETARG_INT(thisarg))));
							break;
						case 'e': case 'E': case 'f': case 'F': case 'g': case 'G':
							if(precision < 0) // not set
								o += dpsnprintf(o, end - o, formatbuf, width, (isfloat ? (double) GETARG_FLOAT(thisarg) : (double) GETARG_INT(thisarg)));
							else
								o += dpsnprintf(o, end - o, formatbuf, width, precision, (isfloat ? (double) GETARG_FLOAT(thisarg) : (double) GETARG_INT(thisarg)));
							break;
						case 'v': case 'V':
							f[-2] += 'g' - 'v';
							if(precision < 0) // not set
								o += dpsnprintf(o, end - o, va(vabuf, sizeof(vabuf), "%s %s %s", /* NESTED SPRINTF IS NESTED */ formatbuf, formatbuf, formatbuf),
									width, (isfloat ? (double) GETARG_VECTOR(thisarg)[0] : (double) GETARG_INTVECTOR(thisarg)[0]),
									width, (isfloat ? (double) GETARG_VECTOR(thisarg)[1] : (double) GETARG_INTVECTOR(thisarg)[1]),
									width, (isfloat ? (double) GETARG_VECTOR(thisarg)[2] : (double) GETARG_INTVECTOR(thisarg)[2])
								);
							else
								o += dpsnprintf(o, end - o, va(vabuf, sizeof(vabuf), "%s %s %s", /* NESTED SPRINTF IS NESTED */ formatbuf, formatbuf, formatbuf),
									width, precision, (isfloat ? (double) GETARG_VECTOR(thisarg)[0] : (double) GETARG_INTVECTOR(thisarg)[0]),
									width, precision, (isfloat ? (double) GETARG_VECTOR(thisarg)[1] : (double) GETARG_INTVECTOR(thisarg)[1]),
									width, precision, (isfloat ? (double) GETARG_VECTOR(thisarg)[2] : (double) GETARG_INTVECTOR(thisarg)[2])
								);
							break;
						case 'c':
							if(flags & PRINTF_ALTERNATE)
							{
								if(precision < 0) // not set
									o += dpsnprintf(o, end - o, formatbuf, width, (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg)));
								else
									o += dpsnprintf(o, end - o, formatbuf, width, precision, (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg)));
							}
							else
							{
								unsigned int c = (isfloat ? (unsigned int) GETARG_FLOAT(thisarg) : (unsigned int) GETARG_INT(thisarg));
								char charbuf16[16];
								const char *buf = u8_encodech(c, NULL, charbuf16);
								if(!buf)
									buf = "";
								if(precision < 0) // not set
									precision = end - o - 1;
								o += u8_strpad(o, end - o, buf, (flags & PRINTF_LEFT) != 0, width, precision);
							}
							break;
						//spike FIXME -- 'S' for quoted tokenize-safe-or-print escaping of strings so stuff can safely survive console commands.
						case 's':
							if(flags & PRINTF_ALTERNATE)
							{
								if(precision < 0) // not set
									o += dpsnprintf(o, end - o, formatbuf, width, GETARG_STRING(thisarg));
								else
									o += dpsnprintf(o, end - o, formatbuf, width, precision, GETARG_STRING(thisarg));
							}
							else
							{
								if(precision < 0) // not set
									precision = end - o - 1;
								if(flags & PRINTF_SIGNPOSITIVE)
									o += u8_strpad(o, end - o, GETARG_STRING(thisarg), (flags & PRINTF_LEFT) != 0, width, precision);
								else
									o += u8_strpad_colorcodes(o, end - o, GETARG_STRING(thisarg), (flags & PRINTF_LEFT) != 0, width, precision);
							}
							break;
						default:
							VM_Warning(prog, "VM_sprintf: invalid directive: %s\n", s0);
							goto finished;
					}
				}
				++s;
				break;
			default:
verbatim:
				if(o < end - 1)
					*o++ = *s;
				++s;
				break;
		}
	}

finished:
	*o = '\0';
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, outbuf, o - outbuf);
}


// surface querying

static model_t *getmodel(prvm_prog_t *prog, prvm_edict_t *ed)
{
	if (prog == SVVM_prog)
		return SV_GetModelFromEdict(ed);
	else if (prog == CLVM_prog)
		return CL_GetModelFromEdict(ed);
	else
		return NULL;
}

struct animatemodel_cache
{
	model_t *model;
	frameblend_t frameblend[MAX_FRAMEBLENDS];
	skeleton_t *skeleton_p;
	skeleton_t skeleton;
	float *data_vertex3f;
	float *data_svector3f;
	float *data_tvector3f;
	float *data_normal3f;
	int max_vertices;
	float *buf_vertex3f;
	float *buf_svector3f;
	float *buf_tvector3f;
	float *buf_normal3f;
};

static void animatemodel_reset(prvm_prog_t *prog)
{
	if (!prog->animatemodel_cache)
		return;
	if(prog->animatemodel_cache->buf_vertex3f) Mem_Free(prog->animatemodel_cache->buf_vertex3f);
	if(prog->animatemodel_cache->buf_svector3f) Mem_Free(prog->animatemodel_cache->buf_svector3f);
	if(prog->animatemodel_cache->buf_tvector3f) Mem_Free(prog->animatemodel_cache->buf_tvector3f);
	if(prog->animatemodel_cache->buf_normal3f) Mem_Free(prog->animatemodel_cache->buf_normal3f);
	Mem_Free(prog->animatemodel_cache);
}

static void animatemodel(prvm_prog_t *prog, model_t *model, prvm_edict_t *ed)
{
	skeleton_t *skeleton;
	int skeletonindex = -1;
	qbool need = false;
	struct animatemodel_cache *animatemodel_cache;
	if (!prog->animatemodel_cache)
	{
		prog->animatemodel_cache = (struct animatemodel_cache *)Mem_Alloc(prog->progs_mempool, sizeof(struct animatemodel_cache));
		memset(prog->animatemodel_cache, 0, sizeof(struct animatemodel_cache));
	}
	animatemodel_cache = prog->animatemodel_cache;
	if(!(model->surfmesh.isanimated && model->AnimateVertices))
	{
		animatemodel_cache->data_vertex3f = model->surfmesh.data_vertex3f;
		animatemodel_cache->data_svector3f = model->surfmesh.data_svector3f;
		animatemodel_cache->data_tvector3f = model->surfmesh.data_tvector3f;
		animatemodel_cache->data_normal3f = model->surfmesh.data_normal3f;
		return;
	}
	need |= (animatemodel_cache->model != model);
	VM_GenerateFrameGroupBlend(prog, ed->priv.server->framegroupblend, ed);
	VM_FrameBlendFromFrameGroupBlend(ed->priv.server->frameblend, ed->priv.server->framegroupblend, model, PRVM_serverglobalfloat(time));
	need |= (memcmp(&animatemodel_cache->frameblend, &ed->priv.server->frameblend, sizeof(ed->priv.server->frameblend))) != 0;
	skeletonindex = (int)PRVM_gameedictfloat(ed, skeletonindex) - 1;
	if (!(skeletonindex >= 0 && skeletonindex < MAX_EDICTS && (skeleton = prog->skeletons[skeletonindex]) && skeleton->model->num_bones == ed->priv.server->skeleton.model->num_bones))
		skeleton = NULL;
	need |= (animatemodel_cache->skeleton_p != skeleton);
	if(skeleton)
		need |= (memcmp(&animatemodel_cache->skeleton, skeleton, sizeof(ed->priv.server->skeleton))) != 0;
	if(!need)
		return;
	if(model->surfmesh.num_vertices > animatemodel_cache->max_vertices)
	{
		animatemodel_cache->max_vertices = model->surfmesh.num_vertices * 2;
		if(animatemodel_cache->buf_vertex3f) Mem_Free(animatemodel_cache->buf_vertex3f);
		if(animatemodel_cache->buf_svector3f) Mem_Free(animatemodel_cache->buf_svector3f);
		if(animatemodel_cache->buf_tvector3f) Mem_Free(animatemodel_cache->buf_tvector3f);
		if(animatemodel_cache->buf_normal3f) Mem_Free(animatemodel_cache->buf_normal3f);
		animatemodel_cache->buf_vertex3f = (float *)Mem_Alloc(prog->progs_mempool, sizeof(float[3]) * animatemodel_cache->max_vertices);
		animatemodel_cache->buf_svector3f = (float *)Mem_Alloc(prog->progs_mempool, sizeof(float[3]) * animatemodel_cache->max_vertices);
		animatemodel_cache->buf_tvector3f = (float *)Mem_Alloc(prog->progs_mempool, sizeof(float[3]) * animatemodel_cache->max_vertices);
		animatemodel_cache->buf_normal3f = (float *)Mem_Alloc(prog->progs_mempool, sizeof(float[3]) * animatemodel_cache->max_vertices);
	}
	animatemodel_cache->data_vertex3f = animatemodel_cache->buf_vertex3f;
	animatemodel_cache->data_svector3f = animatemodel_cache->buf_svector3f;
	animatemodel_cache->data_tvector3f = animatemodel_cache->buf_tvector3f;
	animatemodel_cache->data_normal3f = animatemodel_cache->buf_normal3f;
	VM_UpdateEdictSkeleton(prog, ed, model, ed->priv.server->frameblend);
	model->AnimateVertices(model, ed->priv.server->frameblend, &ed->priv.server->skeleton, animatemodel_cache->data_vertex3f, animatemodel_cache->data_normal3f, animatemodel_cache->data_svector3f, animatemodel_cache->data_tvector3f);
	animatemodel_cache->model = model;
	memcpy(&animatemodel_cache->frameblend, &ed->priv.server->frameblend, sizeof(ed->priv.server->frameblend));
	animatemodel_cache->skeleton_p = skeleton;
	if(skeleton)
		memcpy(&animatemodel_cache->skeleton, skeleton, sizeof(ed->priv.server->skeleton));
}

static void getmatrix(prvm_prog_t *prog, prvm_edict_t *ed, matrix4x4_t *out)
{
	if (prog == SVVM_prog)
		SV_GetEntityMatrix(prog, ed, out, false);
	else if (prog == CLVM_prog)
		CL_GetEntityMatrix(prog, ed, out, false);
	else
		*out = identitymatrix;
}

static void applytransform_forward(prvm_prog_t *prog, const vec3_t in, prvm_edict_t *ed, vec3_t out)
{
	matrix4x4_t m;
	getmatrix(prog, ed, &m);
	Matrix4x4_Transform(&m, in, out);
}

static void applytransform_forward_direction(prvm_prog_t *prog, const vec3_t in, prvm_edict_t *ed, vec3_t out)
{
	matrix4x4_t m;
	getmatrix(prog, ed, &m);
	Matrix4x4_Transform3x3(&m, in, out);
}

static void applytransform_inverted(prvm_prog_t *prog, const vec3_t in, prvm_edict_t *ed, vec3_t out)
{
	matrix4x4_t m, n;
	getmatrix(prog, ed, &m);
	Matrix4x4_Invert_Full(&n, &m);
	Matrix4x4_Transform3x3(&n, in, out);
}

static void applytransform_forward_normal(prvm_prog_t *prog, const vec3_t in, prvm_edict_t *ed, vec3_t out)
{
	matrix4x4_t m;
	float p[4];
	getmatrix(prog, ed, &m);
	Matrix4x4_TransformPositivePlane(&m, in[0], in[1], in[2], 0, p);
	VectorCopy(p, out);
}

static void clippointtosurface(prvm_prog_t *prog, prvm_edict_t *ed, model_t *model, msurface_t *surface, vec3_t p, vec3_t out)
{
	int i, j, k;
	float *v[3], facenormal[3], edgenormal[3], sidenormal[3], temp[3], offsetdist, dist, bestdist;
	const int *e;
	animatemodel(prog, model, ed);
	bestdist = 1000000000;
	VectorCopy(p, out);
	for (i = 0, e = (model->surfmesh.data_element3i + 3 * surface->num_firsttriangle);i < surface->num_triangles;i++, e += 3)
	{
		// clip original point to each triangle of the surface and find the
		// triangle that is closest
		v[0] = prog->animatemodel_cache->data_vertex3f + e[0] * 3;
		v[1] = prog->animatemodel_cache->data_vertex3f + e[1] * 3;
		v[2] = prog->animatemodel_cache->data_vertex3f + e[2] * 3;
		TriangleNormal(v[0], v[1], v[2], facenormal);
		VectorNormalize(facenormal);
		offsetdist = DotProduct(v[0], facenormal) - DotProduct(p, facenormal);
		VectorMA(p, offsetdist, facenormal, temp);
		for (j = 0, k = 2;j < 3;k = j, j++)
		{
			VectorSubtract(v[k], v[j], edgenormal);
			CrossProduct(edgenormal, facenormal, sidenormal);
			VectorNormalize(sidenormal);
			offsetdist = DotProduct(v[k], sidenormal) - DotProduct(temp, sidenormal);
			if (offsetdist < 0)
				VectorMA(temp, offsetdist, sidenormal, temp);
		}
		dist = VectorDistance2(temp, p);
		if (bestdist > dist)
		{
			bestdist = dist;
			VectorCopy(temp, out);
		}
	}
}

static msurface_t *getsurface(model_t *model, int surfacenum)
{
	if (surfacenum < 0 || surfacenum >= model->submodelsurfaces_end - model->submodelsurfaces_start)
		return NULL;
	return model->data_surfaces + surfacenum + model->submodelsurfaces_start;
}


//PF_getsurfacenumpoints, // #434 float(entity e, float s) getsurfacenumpoints = #434;
void VM_getsurfacenumpoints(prvm_prog_t *prog)
{
	model_t *model;
	msurface_t *surface;
	VM_SAFEPARMCOUNT(2, VM_getsurfacenumpoints);
	// return 0 if no such surface
	if (!(model = getmodel(prog, PRVM_G_EDICT(OFS_PARM0))) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
	{
		PRVM_G_FLOAT(OFS_RETURN) = 0;
		return;
	}

	// note: this (incorrectly) assumes it is a simple polygon
	PRVM_G_FLOAT(OFS_RETURN) = surface->num_vertices;
}
//PF_getsurfacepoint,     // #435 vector(entity e, float s, float n) getsurfacepoint = #435;
void VM_getsurfacepoint(prvm_prog_t *prog)
{
	prvm_edict_t *ed;
	model_t *model;
	msurface_t *surface;
	int pointnum;
	vec3_t result;
	VM_SAFEPARMCOUNT(3, VM_getsurfacepoint);
	VectorClear(PRVM_G_VECTOR(OFS_RETURN));
	ed = PRVM_G_EDICT(OFS_PARM0);
	if (!(model = getmodel(prog, ed)) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
		return;
	// note: this (incorrectly) assumes it is a simple polygon
	pointnum = (int)PRVM_G_FLOAT(OFS_PARM2);
	if (pointnum < 0 || pointnum >= surface->num_vertices)
		return;
	animatemodel(prog, model, ed);
	applytransform_forward(prog, &(prog->animatemodel_cache->data_vertex3f + 3 * surface->num_firstvertex)[pointnum * 3], ed, result);
	VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
}
//PF_getsurfacepointattribute,     // #486 vector(entity e, float s, float n, float a) getsurfacepointattribute = #486;
// float SPA_POSITION = 0;
// float SPA_S_AXIS = 1;
// float SPA_T_AXIS = 2;
// float SPA_R_AXIS = 3; // same as SPA_NORMAL
// float SPA_TEXCOORDS0 = 4;
// float SPA_LIGHTMAP0_TEXCOORDS = 5;
// float SPA_LIGHTMAP0_COLOR = 6;
void VM_getsurfacepointattribute(prvm_prog_t *prog)
{
	prvm_edict_t *ed;
	model_t *model;
	msurface_t *surface;
	int pointnum;
	int attributetype;
	vec3_t result;

	VM_SAFEPARMCOUNT(4, VM_getsurfacepointattribute);
	VectorClear(PRVM_G_VECTOR(OFS_RETURN));
	ed = PRVM_G_EDICT(OFS_PARM0);
	if (!(model = getmodel(prog, ed)) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
		return;
	pointnum = (int)PRVM_G_FLOAT(OFS_PARM2);
	if (pointnum < 0 || pointnum >= surface->num_vertices)
		return;
	attributetype = (int) PRVM_G_FLOAT(OFS_PARM3);

	animatemodel(prog, model, ed);

	switch( attributetype ) {
		// float SPA_POSITION = 0;
		case 0:
			applytransform_forward(prog, &(prog->animatemodel_cache->data_vertex3f + 3 * surface->num_firstvertex)[pointnum * 3], ed, result);
			VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
			break;
		// float SPA_S_AXIS = 1;
		case 1:
			applytransform_forward_direction(prog, &(prog->animatemodel_cache->data_svector3f + 3 * surface->num_firstvertex)[pointnum * 3], ed, result);
			VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
			break;
		// float SPA_T_AXIS = 2;
		case 2:
			applytransform_forward_direction(prog, &(prog->animatemodel_cache->data_tvector3f + 3 * surface->num_firstvertex)[pointnum * 3], ed, result);
			VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
			break;
		// float SPA_R_AXIS = 3; // same as SPA_NORMAL
		case 3:
			applytransform_forward_direction(prog, &(prog->animatemodel_cache->data_normal3f + 3 * surface->num_firstvertex)[pointnum * 3], ed, result);
			VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
			break;
		// float SPA_TEXCOORDS0 = 4;
		case 4: {
			float *texcoord = &(model->surfmesh.data_texcoordtexture2f + 2 * surface->num_firstvertex)[pointnum * 2];
			result[0] = texcoord[0];
			result[1] = texcoord[1];
			result[2] = 0.0f;
			VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
			break;
		}
		// float SPA_LIGHTMAP0_TEXCOORDS = 5;
		case 5: {
			float *texcoord = &(model->surfmesh.data_texcoordlightmap2f + 2 * surface->num_firstvertex)[pointnum * 2];
			result[0] = texcoord[0];
			result[1] = texcoord[1];
			result[2] = 0.0f;
			VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
			break;
		}
		// float SPA_LIGHTMAP0_COLOR = 6;
		case 6:
			// ignore alpha for now..
			VectorCopy( &(model->surfmesh.data_lightmapcolor4f + 4 * surface->num_firstvertex)[pointnum * 4], PRVM_G_VECTOR(OFS_RETURN));
			break;
		default:
			VectorSet( PRVM_G_VECTOR(OFS_RETURN), 0.0f, 0.0f, 0.0f );
			break;
	}
}
//PF_getsurfacenormal,    // #436 vector(entity e, float s) getsurfacenormal = #436;
void VM_getsurfacenormal(prvm_prog_t *prog)
{
	model_t *model;
	msurface_t *surface;
	vec3_t normal;
	vec3_t result;
	VM_SAFEPARMCOUNT(2, VM_getsurfacenormal);
	VectorClear(PRVM_G_VECTOR(OFS_RETURN));
	if (!(model = getmodel(prog, PRVM_G_EDICT(OFS_PARM0))) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
		return;
	// note: this only returns the first triangle, so it doesn't work very
	// well for curved surfaces or arbitrary meshes
	animatemodel(prog, model, PRVM_G_EDICT(OFS_PARM0));
	TriangleNormal((prog->animatemodel_cache->data_vertex3f + 3 * surface->num_firstvertex), (prog->animatemodel_cache->data_vertex3f + 3 * surface->num_firstvertex) + 3, (prog->animatemodel_cache->data_vertex3f + 3 * surface->num_firstvertex) + 6, normal);
	applytransform_forward_normal(prog, normal, PRVM_G_EDICT(OFS_PARM0), result);
	VectorNormalize(result);
	VectorCopy(result, PRVM_G_VECTOR(OFS_RETURN));
}
//PF_getsurfacetexture,   // #437 string(entity e, float s) getsurfacetexture = #437;
void VM_getsurfacetexture(prvm_prog_t *prog)
{
	model_t *model;
	msurface_t *surface;

	VM_SAFEPARMCOUNT(2, VM_getsurfacetexture);
	PRVM_G_INT(OFS_RETURN) = OFS_NULL;
	if (!(model = getmodel(prog, PRVM_G_EDICT(OFS_PARM0))) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
		return;
	PRVM_G_INT(OFS_RETURN) = PRVM_SetTempString(prog, surface->texture->name, strlen(surface->texture->name));
}
//PF_getsurfacenearpoint, // #438 float(entity e, vector p) getsurfacenearpoint = #438;
void VM_getsurfacenearpoint(prvm_prog_t *prog)
{
	int surfacenum, best;
	vec3_t clipped, p;
	vec_t dist, bestdist;
	prvm_edict_t *ed;
	model_t *model;
	msurface_t *surface;
	vec3_t point;
	VM_SAFEPARMCOUNT(2, VM_getsurfacenearpoint);
	PRVM_G_FLOAT(OFS_RETURN) = -1;
	ed = PRVM_G_EDICT(OFS_PARM0);
	VectorCopy(PRVM_G_VECTOR(OFS_PARM1), point);

	if (!ed || ed->free)
		return;
	model = getmodel(prog, ed);
	if (!model || !model->num_surfaces)
		return;

	animatemodel(prog, model, ed);

	applytransform_inverted(prog, point, ed, p);
	best = -1;
	bestdist = 1000000000;
	for (surfacenum = model->submodelsurfaces_start;surfacenum < model->submodelsurfaces_end;surfacenum++)
	{
		surface = model->data_surfaces + surfacenum;
		// first see if the nearest point on the surface's box is closer than the previous match
		clipped[0] = bound(surface->mins[0], p[0], surface->maxs[0]) - p[0];
		clipped[1] = bound(surface->mins[1], p[1], surface->maxs[1]) - p[1];
		clipped[2] = bound(surface->mins[2], p[2], surface->maxs[2]) - p[2];
		dist = VectorLength2(clipped);
		if (dist < bestdist)
		{
			// it is, check the nearest point on the actual geometry
			clippointtosurface(prog, ed, model, surface, p, clipped);
			VectorSubtract(clipped, p, clipped);
			dist += VectorLength2(clipped);
			if (dist < bestdist)
			{
				// that's closer too, store it as the best match
				best = surfacenum - model->submodelsurfaces_start;
				bestdist = dist;
			}
		}
	}
	PRVM_G_FLOAT(OFS_RETURN) = best;
}
//PF_getsurfaceclippedpoint, // #439 vector(entity e, float s, vector p) getsurfaceclippedpoint = #439;
void VM_getsurfaceclippedpoint(prvm_prog_t *prog)
{
	prvm_edict_t *ed;
	model_t *model;
	msurface_t *surface;
	vec3_t p, out, inp;
	VM_SAFEPARMCOUNT(3, VM_getsurfaceclippedpoint);
	VectorClear(PRVM_G_VECTOR(OFS_RETURN));
	ed = PRVM_G_EDICT(OFS_PARM0);
	if (!(model = getmodel(prog, ed)) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
		return;
	animatemodel(prog, model, ed);
	VectorCopy(PRVM_G_VECTOR(OFS_PARM2), inp);
	applytransform_inverted(prog, inp, ed, p);
	clippointtosurface(prog, ed, model, surface, p, out);
	VectorAdd(out, PRVM_serveredictvector(ed, origin), PRVM_G_VECTOR(OFS_RETURN));
}

//PF_getsurfacenumtriangles, // #??? float(entity e, float s) getsurfacenumtriangles = #???;
void VM_getsurfacenumtriangles(prvm_prog_t *prog)
{
       model_t *model;
       msurface_t *surface;
       VM_SAFEPARMCOUNT(2, VM_getsurfacenumtriangles);
       // return 0 if no such surface
       if (!(model = getmodel(prog, PRVM_G_EDICT(OFS_PARM0))) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
       {
               PRVM_G_FLOAT(OFS_RETURN) = 0;
               return;
       }

       PRVM_G_FLOAT(OFS_RETURN) = surface->num_triangles;
}
//PF_getsurfacetriangle,     // #??? vector(entity e, float s, float n) getsurfacetriangle = #???;
void VM_getsurfacetriangle(prvm_prog_t *prog)
{
       const vec3_t d = {-1, -1, -1};
       prvm_edict_t *ed;
       model_t *model;
       msurface_t *surface;
       int trinum;
       VM_SAFEPARMCOUNT(3, VM_getsurfacetriangle);
       VectorClear(PRVM_G_VECTOR(OFS_RETURN));
       ed = PRVM_G_EDICT(OFS_PARM0);
       if (!(model = getmodel(prog, ed)) || !(surface = getsurface(model, (int)PRVM_G_FLOAT(OFS_PARM1))))
               return;
       trinum = (int)PRVM_G_FLOAT(OFS_PARM2);
       if (trinum < 0 || trinum >= surface->num_triangles)
               return;
       // FIXME: implement rotation/scaling
       VectorMA(&(model->surfmesh.data_element3i + 3 * surface->num_firsttriangle)[trinum * 3], surface->num_firstvertex, d, PRVM_G_VECTOR(OFS_RETURN));
}

//
// physics builtins
//

#ifdef USEODE
#define VM_physics_ApplyCmd(ed,f) if (!ed->priv.server->ode_body) VM_physics_newstackfunction(prog, ed, f); else World_Physics_ApplyCmd(ed, f)

static edict_odefunc_t *VM_physics_newstackfunction(prvm_prog_t *prog, prvm_edict_t *ed, edict_odefunc_t *f)
{
	edict_odefunc_t *newfunc, *func;

	newfunc = (edict_odefunc_t *)Mem_Alloc(prog->progs_mempool, sizeof(edict_odefunc_t));
	memcpy(newfunc, f, sizeof(edict_odefunc_t));
	newfunc->next = NULL;
	if (!ed->priv.server->ode_func)
		ed->priv.server->ode_func = newfunc;
	else
	{
		for (func = ed->priv.server->ode_func; func->next; func = func->next);
		func->next = newfunc;
	}
	return newfunc;
}
#endif

// void(entity e, float physics_enabled) physics_enable = #;
void VM_physics_enable(prvm_prog_t *prog)
{
#ifdef USEODE
	prvm_edict_t *ed;
	edict_odefunc_t f;
#endif
	VM_SAFEPARMCOUNT(2, VM_physics_enable);
#ifdef USEODE
	ed = PRVM_G_EDICT(OFS_PARM0);
	if (!ed)
	{
		if (developer.integer > 0)
			VM_Warning(prog, "VM_physics_enable: null entity!\n");
		return;
	}
	// entity should have MOVETYPE_PHYSICS already set, this can damage memory (making leaked allocation) so warn about this even if non-developer
	if (PRVM_serveredictfloat(ed, movetype) != MOVETYPE_PHYSICS)
	{
		VM_Warning(prog, "VM_physics_enable: entity is not MOVETYPE_PHYSICS!\n");
		return;
	}
	f.type = PRVM_G_FLOAT(OFS_PARM1) == 0 ? ODEFUNC_DISABLE : ODEFUNC_ENABLE;
	VM_physics_ApplyCmd(ed, &f);
#endif
}

// void(entity e, vector force, vector relative_ofs) physics_addforce = #;
void VM_physics_addforce(prvm_prog_t *prog)
{
#ifdef USEODE
	prvm_edict_t *ed;
	edict_odefunc_t f;
#endif
	VM_SAFEPARMCOUNT(3, VM_physics_addforce);
#ifdef USEODE
	ed = PRVM_G_EDICT(OFS_PARM0);
	if (!ed)
	{
		if (developer.integer > 0)
			VM_Warning(prog, "VM_physics_addforce: null entity!\n");
		return;
	}
	// entity should have MOVETYPE_PHYSICS already set, this can damage memory (making leaked allocation) so warn about this even if non-developer
	if (PRVM_serveredictfloat(ed, movetype) != MOVETYPE_PHYSICS)
	{
		VM_Warning(prog, "VM_physics_addforce: entity is not MOVETYPE_PHYSICS!\n");
		return;
	}
	f.type = ODEFUNC_FORCE;
	VectorCopy(PRVM_G_VECTOR(OFS_PARM1), f.v1);
	VectorCopy(PRVM_G_VECTOR(OFS_PARM2), f.v2);
	VM_physics_ApplyCmd(ed, &f);
#endif
}

// void(entity e, vector torque) physics_addtorque = #;
void VM_physics_addtorque(prvm_prog_t *prog)
{
#ifdef USEODE
	prvm_edict_t *ed;
	edict_odefunc_t f;
#endif
	VM_SAFEPARMCOUNT(2, VM_physics_addtorque);
#ifdef USEODE
	ed = PRVM_G_EDICT(OFS_PARM0);
	if (!ed)
	{
		if (developer.integer > 0)
			VM_Warning(prog, "VM_physics_addtorque: null entity!\n");
		return;
	}
	// entity should have MOVETYPE_PHYSICS already set, this can damage memory (making leaked allocation) so warn about this even if non-developer
	if (PRVM_serveredictfloat(ed, movetype) != MOVETYPE_PHYSICS)
	{
		VM_Warning(prog, "VM_physics_addtorque: entity is not MOVETYPE_PHYSICS!\n");
		return;
	}
	f.type = ODEFUNC_TORQUE;
	VectorCopy(PRVM_G_VECTOR(OFS_PARM1), f.v1);
	VM_physics_ApplyCmd(ed, &f);
#endif
}

extern cvar_t prvm_coverage;
void VM_coverage(prvm_prog_t *prog)
{
	VM_SAFEPARMCOUNT(0, VM_coverage);
	if (prog->explicit_profile[prog->xstatement]++ == 0 && (prvm_coverage.integer & 2))
		PRVM_ExplicitCoverageEvent(prog, prog->xfunction, prog->xstatement);
}