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decode.cpp
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/*
isDcc
(c) 1998 Andrew de Quincey
See README.TXT for copying/distribution/modification details.
*/
#include <string.h>
#include <stdio.h>
#include <io.h>
#include "common.h"
#include "decodeOps.h"
#include "decodetable.h"
#include "util.h"
static int labelCounter;
static int instructionCounter;
int argnum = 0;
static void addCodeLine(ISData* isData, int inCounter, CodeLine* codeLine);
static int parseArg(int fd, Parameter* param, ISData* isData, int inCounter, int updateUsage);
static int parseOther(int fd, void* buffer);
static int parseComparison(int comparison);
static void decodePass0(int fd, ISData* isData);
static void decodePass1(ISData* isData);
static void decodePass2(ISData* isData);
void initDecode(void)
{
int i;
int pos;
// get memory & wipe decodeTable
decodeTable = (DecodeEntry**) mallocX(sizeof(DecodeEntry*)*DECODETABLESIZE);
for(i =0; i < DECODETABLESIZE; i++)
decodeTable[i] = NULL;
for(i=0; i< rawDecodeTableSize; i++)
{
// check op isn't out of range
if ((pos = (int) rawDecodeTable[i][0]) > DECODETABLESIZE)
error("\n!!!!Decode table entry out of range! (%i >= %i)\n", pos, DECODETABLESIZE);
// check we don't have duplicates
if (decodeTable[pos] != NULL)
error("Duplicate entries for opcode (0x%x) in decode table!\n", pos);
// make new memspace for entry
decodeTable[pos] = (DecodeEntry*) malloc(sizeof(DecodeEntry));
// add in the useful stuff
decodeTable[pos]->text = (char*) rawDecodeTable[i][1];
decodeTable[pos]->info.numParams = (int) rawDecodeTable[i][2];
decodeTable[pos]->decodeFunction0 = (decodeFunc) rawDecodeTable[i][3];
}
/*
for(i=0; i< DECODETABLESIZE; i++)
{
if (decodeTable[i])
continue;
printf("%x\n", i);
}
exit(1);
*/
// zero the label & instruction counters
// it seems labels do after all start with 1 (at least in version 5)
labelCounter=1; //version2.1
instructionCounter=0;
}
void decode(int fd, ISData* isData)
{
// pass 0 - read the code in from the file
decodePass0(fd, isData);
// pass 1 - work out function prototype/body pairings & fix local variable counts
// The problem is that the order in which the function bodies appear in the
// .ins file does not correspond to the function numbering (1,2,..). A connection
// between function prototypes (headers) and bodies can only be made, because
// each function has also a label associated with it (in the function call i.e.
// function102() ) and I know in which body this label is.
decodePass1(isData);
// pass 2 - fix local/parameter variable indicators
decodePass2(isData);
}
// pass 1 - work out function prototype/body pairings, fix local variable counts,
static void decodePass1(ISData* isData)
{
int i;
int j;
int fn;
// do the main body of the code
for(i=0; i< isData->codeLinesCount; i++)
{
// ah ha! a function call. we can update
if ((isData->codeLines[i]->type == FUNCTION) &&
(isData->codeLines[i]->functionNumber >= 0) &&
(isData->functionPrototypes[isData->codeLines[i]->functionNumber]->type == FUNCTION_USER))
{
// get the function number
fn = isData->codeLines[i]->functionNumber;
// skip if we've already done this one
if (isData->functionPrototypes[fn]->functionBody != NULL) continue;
// check we've not got an invalid function label (i.e. the label is
// present in the main code, NOT a function
if (isData->labels[isData->codeLines[i]->destLabel]->functionNumber == -1)
error("Invalid function label\n");
// update function body pointer
isData->functionPrototypes[fn]->functionBody =
isData->functionBodies[isData->labels[isData->codeLines[i]->destLabel]->functionNumber];
// update local string vars counts
isData->functionPrototypes[fn]->localParamSize = isData->functionPrototypes[fn]->functionBody->localParamSize;
}
}
// do the functions
for(i=0; i< isData->functionBodiesCount; i++)
{
for(j=0; j< isData->functionBodies[i]->codeLinesCount; j++)
{
// ah ha! a function call. we can update
if ((isData->functionBodies[i]->codeLines[j]->type == FUNCTION) &&
(isData->functionBodies[i]->codeLines[j]->functionNumber >= 0) &&
(isData->functionPrototypes[isData->functionBodies[i]->codeLines[j]->functionNumber]->type == FUNCTION_USER))
{
// get the function number
fn = isData->functionBodies[i]->codeLines[j]->functionNumber;
// skip if we've already done this one
if (isData->functionPrototypes[fn]->functionBody != NULL)
continue;
// update function body pointer
isData->functionPrototypes[fn]->functionBody =
isData->functionBodies[isData->labels[isData->functionBodies[i]->codeLines[j]->destLabel]->functionNumber];
isData->functionPrototypes[fn]->localParamSize =
isData->functionPrototypes[fn]->functionBody->localParamSize;
/*
// update local string vars counts
isData->functionPrototypes[fn]->localStringsCount =
isData->functionPrototypes[fn]->functionBody->localStringsCount -
isData->functionPrototypes[fn]->paramStringsCount;
isData->functionPrototypes[fn]->localStrings =
isData->functionPrototypes[fn]->functionBody->localStrings +
(sizeof(int) * isData->functionPrototypes[fn]->paramStringsCount);
// update local number vars counts
isData->functionPrototypes[fn]->localNumbersCount =
isData->functionPrototypes[fn]->functionBody->localNumbersCount -
isData->functionPrototypes[fn]->paramNumbersCount;
isData->functionPrototypes[fn]->localNumbers =
isData->functionPrototypes[fn]->functionBody->localNumbers +
(sizeof(int) * isData->functionPrototypes[fn]->paramNumbersCount); */
}
}
}
}
// pass 2 - fix local/parameter variable indicators
static void decodePass2(ISData* isData)
{
int i;
int j;
int k;
for(i=0; i< isData->functionPrototypesCount; i++)
{
// function not actually used
if (isData->functionPrototypes[i]->functionBody == NULL)
continue;
for(j=0; j< isData->functionPrototypes[i]->functionBody->codeLinesCount; j++)
{
for(k=0; k< isData->functionPrototypes[i]->functionBody->codeLines[j]->paramsCount; k++)
{
// printf("\t\tP%i\n", isData->functionPrototypes[i]->functionBody->codeLines[j]->paramsCount);
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type == PARAM_FNLOCALSTRINGVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber <
isData->functionPrototypes[i]->paramStringsCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type = PARAM_FNPARAMSTRINGVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber -=
isData->functionPrototypes[i]->paramStringsCount;
}
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type == PARAM_FNLOCALNUMBERVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber <
isData->functionPrototypes[i]->paramNumbersCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->type = PARAM_FNPARAMNUMBERVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->params[k]->data.variableNumber -=
isData->functionPrototypes[i]->paramNumbersCount;
}
}
// fix the destination
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination != NULL)
{
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type == PARAM_FNLOCALSTRINGVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber <
isData->functionPrototypes[i]->paramStringsCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type = PARAM_FNPARAMSTRINGVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber -=
isData->functionPrototypes[i]->paramStringsCount;
}
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type == PARAM_FNLOCALNUMBERVARIABLE)
{
// this is actually a parameter variable
if (isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber <
isData->functionPrototypes[i]->paramNumbersCount)
{
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->type = PARAM_FNPARAMNUMBERVARIABLE;
}
// actually a local variable
else
isData->functionPrototypes[i]->functionBody->codeLines[j]->destination->data.variableNumber -=
isData->functionPrototypes[i]->paramNumbersCount;
}
}
}
}
}
// pass 0 => decode stuff from the file
void decodePass0(int fd, ISData* isData)
{
int opcode;
int i,j;
int expectFunctionStart;
int curFunction,currFuncFileOffset;
int pos;
int last_label = 0;
// decode the functions/ subroutines
curFunction = 0;
while(1)
{
// need to check this as well, 'cos you don't always have an _EWQ section
// this needs to be checked FIRST, otherwise we'll interfere with opcode
// reading
pos = _tell(fd);
currFuncFileOffset = pos;
if (pos >= isData->eofPos)
{
isData->functionBodiesCount = curFunction;
return;
}
opcode = get2Byte(fd); //First 2bytes are some size.
// check for EOF (read next opcode, move back & check it's not 0x455f)
opcode = get2Byte(fd);
_lseek(fd, -2, 1);
// check we've not got too many functions
if (curFunction == isData->functionBodiesCount)
error("Too many functions found!\n");
// make up space for the codelines in this function
isData->functionBodies[curFunction] = (FunctionBody*) mallocX(sizeof(FunctionBody));
isData->functionBodies[curFunction]->codeLines = (CodeLine**) mallocX(sizeof(CodeLine*));
isData->functionBodies[curFunction]->codeLinesCount = 0;
isData->functionBodies[curFunction]->codeLinesMax = 1;
// zero instruction counter, so label offsets will be relative to the
// start of the function they are in
instructionCounter=0;
// printf("------------\n");
// right, process the code for real now
expectFunctionStart=1;
while(1)
{
// need to check this as well, 'cos you don't always have an _EWQ section
// this needs to be checked FIRST, otherwise we'll interfere with opcode
// reading
pos = _tell(fd);
if (pos >= isData->eofPos)
{
isData->functionBodiesCount = curFunction;
return;
}
for(i=last_label;i<isData->labelsCount;i++)
{
if ( isData->labels[i]->file_position == pos )
{
last_label = i+1;
opcode = get2Byte(fd);
}
if ( isData->labels[i]->file_position >= pos )
{
last_label = i;
break;
}
}
// get opcode
opcode = get2Byte(fd);
// hit a function start here? => end of function
if ((opcode == 0x0022) && (!expectFunctionStart))
{
_lseek(fd, -2, 1);
break;
}
// hit a function start here? => ignore it
if ((opcode == 0x0022) && expectFunctionStart)
{
for(j=0;j<isData->functionPrototypesCount;j++)
{
if ( isData->functionPrototypes[j]->label == currFuncFileOffset )
{
isData->functionPrototypes[j]->functionBody = isData->functionBodies[curFunction];
break;
}
}
expectFunctionStart=0;
}
// printf("%x -- %x\n", _tell(fd), opcode);
// check opcode in range & in table
if ((opcode > DECODETABLESIZE) || (opcode < 0))
error("\n!!!!Opcode out of range(0x%x) at (0x%x)\n", opcode, _tell(fd));
if (decodeTable[opcode] == NULL)
error("\n!!!!Unknown opcode (0x%x) at (0x%x)\n", opcode, _tell(fd));
// run the function if there is one
if (decodeTable[opcode]->decodeFunction0 != NULL)
(*decodeTable[opcode]->decodeFunction0)(fd, opcode, curFunction, isData);
if ( opcode == 0x0026 )
break;
}
// keep function indicator up to date
curFunction++;
pos = _tell(fd);
if ( pos >= isData->endCodeSegmentOffset )
break;
}
isData->functionBodiesCount = curFunction;
}
// ----------------------------------------------------------------------------
// function for parsing labels
static void label(int fd, int opcode, int inCounter, ISData* isData)
{
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = LABEL;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->labelNumber = labelCounter;
codeLine->paramsCount =0;
codeLine->destination = NULL;
// record where this label is (relative to the main code, or the
// current function start, since instructionCounter is reset at the
// start of each new function
isData->labels[labelCounter]->position = instructionCounter;
isData->labels[labelCounter]->functionNumber = inCounter;
// just dump the no. of instructions to next label
get2Byte(fd);
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
// move onto the next label
labelCounter++;
}
// ----------------------------------------------------------------------------
// function for equating things
static void equate(int fd, int opcode, int inCounter, ISData* isData)
{
int argType,nbArg;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->operationNumber = OP_EQUATE;
codeLine->paramsCount = 1;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*));
strcpy_s(codeLine->string, "=");
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
nbArg = get2Byte(fd);
if ( nbArg == 1 )
{
codeLine->paramsCount = 0;
codeLine->destination->type = PARAM_SYSTEMNUMBERVARIABLE;
codeLine->destination->data.variableNumber = get2Byte(fd);
}
else
{
if ( nbArg != 2 ) //!! What is that?
{
codeLine->paramsCount = 0;
_lseek(fd,-2,1); //Skip that one.
return;
}
if ( nbArg != 2 )
error("\n!!!!Unexpected variable count type at (0x%x) in strCopy\n", _tell(fd));
// get the destination
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// printf("YY%i\n", isData->codeLines[0]->type);
// get the source
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(argType = parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
case PARAM_STRINGCONST:
case PARAM_LONGCONST:
break;
default:
printf("%i\n", argType);
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for an if statement
static void ifStmt(int fd, int opcode, int inCounter, ISData* isData)
{
char buffer[512];
int unknown;
int label;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = IFSTATEMENT;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = get2Byte(fd);
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) * 2);
codeLine->destination = NULL;
// get jump destination
if (parseOther(fd, (void*) buffer) != OTHER_LABEL)
error("\n!!!!Unexpected variable type at (0x%x) in ifStmt\n", _tell(fd));
// removed -1 since label0 can exist
label = *((int*) buffer);
codeLine->destLabel = label;
/*
// build up a cross reference list. version2.1
makeCrossRef(label, codeLine->offset, isData);
// update label's usage count
// removed -1 since label0 can exist
isData->labels[label]->usage++;
*/
// parse comparison
if ((codeLine->comparisonType = parseComparison(get1Byte(fd))) == OP_UNKNOWN)
error("\n!!!!Unknown comparison type at (0x%x) in compare\n", _tell(fd));
// get first operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_USERNUMBERVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in ifStmt\n",
_tell(fd));
}
// get second operand
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_USERNUMBERVARIABLE:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in ifStmt\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a comparison
static void comparison(int fd, int opcode, int inCounter, ISData* isData)
{
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
Parameter tmpParam;
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = 2;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) * 2);
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// get first operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// get the comparison type
if (parseArg(fd, &tmpParam, isData, inCounter, 0) != PARAM_LONGCONST)
error("\n!!!!Unexpected variable type at (0x%x) in compare\n", _tell(fd));
if ((codeLine->operationNumber = parseComparison(tmpParam.data.intVal)) == OP_UNKNOWN)
error("\n!!!!Unknown comparison type at (0x%x) in compare\n", _tell(fd));
strcpy_s(codeLine->string, operations[codeLine->operationNumber]);
// get second operand
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a generic operation decode
static void decodeOp(int fd, int opcode, int inCounter, ISData* isData)
{
int arg,i,val;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = get2Byte(fd)-1;
codeLine->operationNumber = decodeTable[opcode]->info.operationNumber;
strcpy_s(codeLine->string, operations[decodeTable[opcode]->info.operationNumber]);
if ( codeLine->operationNumber == OP_POINTER )
{
_lseek(fd,-2,1);
codeLine->paramsCount = 1;
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) *codeLine->paramsCount);
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
codeLine->params[0]->data.intVal = get2Byte(fd);
codeLine->params[0]->type = PARAM_DATATYPENUM;
codeLine->params[0]->byref = 0;
arg = parseArg(fd, codeLine->destination, isData, inCounter, 1);
}
else if (( codeLine->operationNumber == OP_UNKNOWN )||
//( opcode == 0x2b)||
( opcode == 0x62)) // !!!
{
_lseek(fd,-2,1);
codeLine->paramsCount = 0;
codeLine->destination = 0;
}
else if ( ( opcode == 0x0004 && codeLine->paramsCount > 1 ) ||
( ((opcode >= 0x0007 && opcode < 0x0020) || (opcode == 0x2a) || (opcode == 0x2b)) && codeLine->paramsCount > 2 ))
{
_lseek(fd,-2,1);
codeLine->paramsCount = 0;
codeLine->destination = 0;
}
else
{
if ( opcode == 0x0004 && codeLine->paramsCount == 1 )
{
val = get2Byte(fd);
if ( val == 0 )
{
codeLine->paramsCount = 0;
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
codeLine->destination->data.intVal = val;
codeLine->destination->type = PARAM_DATATYPENUM;
codeLine->destination->byref = 0;
goto output_line;
}
else
_lseek(fd,-2,1);
}
if ( codeLine->paramsCount > -1 )
{
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
arg = parseArg(fd, codeLine->destination, isData, inCounter, 1);
codeLine->params = NULL;
if ( codeLine->paramsCount > 0 )
{
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) *codeLine->paramsCount);
for(i=0;i<codeLine->paramsCount;i++)
{
// get first operand
codeLine->params[i] = (Parameter*) mallocX(sizeof(Parameter));
arg = parseArg(fd, codeLine->params[i], isData, inCounter, 1);
}
}
}
else
{
codeLine->paramsCount = 0;
codeLine->destination = NULL;
codeLine->params = NULL;
}
}
output_line:
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a single variable operation
static void singleVarOp(int fd, int opcode, int inCounter, ISData* isData)
{
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = 2;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*)*2);
codeLine->operationNumber = decodeTable[opcode]->info.operationNumber;
strcpy_s(codeLine->string, operations[decodeTable[opcode]->info.operationNumber]);
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// copy destination into 1st param
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
memcpy(codeLine->params[0], codeLine->destination, sizeof(Parameter));
// get operand
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for a NOT operation
static void notOp(int fd, int opcode, int inCounter, ISData* isData)
{
char buffer[512];
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = OPERATION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->paramsCount = 1;
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*));
codeLine->operationNumber = decodeTable[opcode]->info.operationNumber;
strcpy_s(codeLine->string, operations[decodeTable[opcode]->info.operationNumber]);
// get the destination
codeLine->destination = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->destination, isData, inCounter, 1))
{
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in strCopy\n",
_tell(fd));
}
// ignore this. it is a copy of the other operand
// (it seems to put this in, even though BIT NOT takes only one operand!)
parseArg(fd, (Parameter*) buffer, isData, inCounter, 0);
// get operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------
// function for the AskOptions(...) dialogue
static void askOptions(int fd, int opcode, int inCounter, ISData* isData)
{
int numPairs;
char buffer[512];
int argType;
int count;
CodeLine* codeLine = (CodeLine*) mallocX(sizeof(CodeLine));
// setup start of structure
codeLine->type = FUNCTION;
codeLine->offset = _tell(fd)-2; //version2
codeLine->opcode = opcode;
codeLine->functionNumber = -1;
codeLine->destination = NULL;
// copy function's name into it
codeLine->name = (char*) mallocX(strlen(decodeTable[opcode]->text)+1);
strcpy_s(codeLine->name, strlen(decodeTable[opcode]->text) + 1, decodeTable[opcode]->text);
// get the number of pairs
if ((argType = parseOther(fd, (void*) buffer)) != OTHER_NUMPARAMS)
error("\n!!!!Unexpected variable type at (0x%x) in askOptions\n",
_tell(fd));
numPairs = *((int*) buffer);
codeLine->params = (Parameter**) mallocX(sizeof(Parameter*) * (2 + (numPairs * 2)));
codeLine->paramsCount = 2 + (numPairs * 2);
// first two args definitely there
// get first operand
codeLine->params[0] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[0], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// get second operand (string)
codeLine->params[1] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[1], isData, inCounter, 1))
{
case PARAM_STRINGCONST:
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// extract (variable number of) args
for(count =0; count < numPairs; count++)
{
// get first operand (string)
codeLine->params[2+(count*2)] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[2 + (count*2)], isData, inCounter, 1))
{
case PARAM_STRINGCONST:
case PARAM_SYSTEMSTRINGVARIABLE:
case PARAM_USERSTRINGVARIABLE:
case PARAM_FNPARAMSTRINGVARIABLE:
case PARAM_FNLOCALSTRINGVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
// get second operand (number)
codeLine->params[2+1+(count*2)] = (Parameter*) mallocX(sizeof(Parameter));
switch(parseArg(fd, codeLine->params[2 + 1 +(count*2)], isData, inCounter, 1))
{
case PARAM_LONGCONST:
case PARAM_SYSTEMNUMBERVARIABLE:
case PARAM_USERNUMBERVARIABLE:
case PARAM_FNPARAMNUMBERVARIABLE:
case PARAM_FNLOCALNUMBERVARIABLE:
break;
default:
error("\n!!!!Unexpected variable type at (0x%x) in compare\n",
_tell(fd));
}
}
// add it into the appropriate list of codelines
addCodeLine(isData, inCounter, codeLine);
// next instruction
instructionCounter++;
}
// ----------------------------------------------------------------------------