TextConv.cpp

/**
 * SADX Mod Loader
 * Text conversion functions.
 */

#include "stdafx.h"
#include "TextConv.h"

#define WIN32_LEAN_AND_MEAN
#include <windows.h>

#define CP_SJIS 932

 /**
  * Convert multibyte text to UTF-16.
  * @param mbs Multibyte text, null-terminated.
  * @param cp Code page.
  * @return UTF-16 text (allocated via new[]), or nullptr on error.
  */
wchar_t* MBStoUTF16(const char* mbs, unsigned int cp)
{
	int cchWcs = MultiByteToWideChar(cp, 0, mbs, -1, NULL, 0);
	if (cchWcs <= 0)
		return nullptr;
	wchar_t* wcs = new wchar_t[cchWcs];
	MultiByteToWideChar(cp, 0, mbs, -1, wcs, cchWcs);
	return wcs;
}

/**
 * Convert UTF-16 text to multibyte.
 * @param wcs UTF-16 text, null-terminated.
 * @param cp Code page.
 * @return Multibyte text (allocated via new[]), or nullptr on error.
 */
char* UTF16toMBS(const wchar_t* wcs, unsigned int cp)
{
	int cbMbs = WideCharToMultiByte(cp, 0, wcs, -1, NULL, 0, NULL, NULL);
	if (cbMbs <= 0)
		return nullptr;
	char* mbs = new char[cbMbs];
	WideCharToMultiByte(cp, 0, wcs, -1, mbs, cbMbs, NULL, NULL);
	return mbs;
}

/** Convenience functions. **/

/**
 * Convert from one multibyte text format to another
 * @param source Text to convert.
 * @param sourcecp Code page of the source string.
 * @param targetcp Code page to convert to.
 * @return Converted text, or empty string on error.
 */
char* MBStoMBS(const char* source, unsigned int sourcecp, unsigned int targetcp)
{
	// Convert from the source codepage to UTF-16.
	wchar_t* wcs = MBStoUTF16(source, sourcecp);
	if (!wcs)
		return nullptr;

	// Convert from UTF-16 to the target codepage.
	char* mbs = UTF16toMBS(wcs, targetcp);
	delete[] wcs;
	if (!mbs)
		return nullptr;

	return mbs;
}

/**
 * Convert Shift-JIS text to UTF-8.
 * @param sjis Shift-JIS text, null-terminated.
 * @return UTF-8 text (allocated via new[]), or nullptr on error.
 */
char* SJIStoUTF8(const char* sjis)
{
	return MBStoMBS(sjis, CP_SJIS, CP_UTF8);
}

/**
 * Convert UTF-8 text to Shift-JIS.
 * @param utf8 UTF-8 text, null-terminated.
 * @return Shift-JIS text (allocated via new[]), or nullptr on error.
 */
char* UTF8toSJIS(const char* utf8)
{
	return MBStoMBS(utf8, CP_UTF8, CP_SJIS);
}

/**
 * Convert UTF-8 text to Windows-1252.
 * @param utf8 UTF-8 text, null-terminated.
 * @return Windows-1252 text (allocated via new[]), or nullptr on error.
 */
char* UTF8to1252(const char* utf8)
{
	return MBStoMBS(utf8, CP_UTF8, 1252);
}

/** C++ wrappers. **/

#include <string>
using std::string;
using std::wstring;

/**
 * Convert multibyte text to UTF-16.
 * @param mbs Multibyte text.
 * @param cp Code page.
 * @return UTF-16 text, or empty string on error.
 */
wstring MBStoUTF16(const string& mbs, unsigned int cp)
{
	wchar_t* wcs = MBStoUTF16(mbs.c_str(), cp);
	if (!wcs)
		return wstring();

	wstring wstr(wcs);
	delete[] wcs;
	return wstr;
}

/**
 * Convert UTF-16 text to multibyte.
 * @param wcs UTF-16 text.
 * @param cp Code page.
 * @return Multibyte text, or empty string on error.
 */
string UTF16toMBS(const wstring& wcs, unsigned int cp)
{
	char* mbs = UTF16toMBS(wcs.c_str(), cp);
	if (!mbs)
		return string();

	string mstr(mbs);
	delete[] mbs;
	return mstr;
}

/** Convenience functions. **/

/**
 * Convert from one multibyte text format to another
 * @param source Text to convert.
 * @param sourcecp Code page of the source string.
 * @param targetcp Code page to convert to.
 * @return Converted text, or empty string on error.
 */
string MBStoMBS(const string& source, unsigned int sourcecp, unsigned int targetcp)
{
	char* mbs = MBStoMBS(source.c_str(), sourcecp, targetcp);
	if (!mbs)
		return string();

	string mstr(mbs);
	delete[] mbs;
	return mstr;
}

/**
 * Convert Shift-JIS text to UTF-8.
 * @param sjis Shift-JIS text.
 * @return UTF-8 text, or empty string on error.
 */
string SJIStoUTF8(const string& sjis)
{
	return MBStoMBS(sjis, CP_SJIS, CP_UTF8);
}

/**
 * Convert UTF-8 text to Shift-JIS.
 * @param utf8 UTF-8 text.
 * @return Shift-JIS text, or empty string on error.
 */
string UTF8toSJIS(const string& utf8)
{
	return MBStoMBS(utf8, CP_UTF8, CP_SJIS);
}

/**
 * Convert UTF-8 text to Windows-1252.
 * @param utf8 UTF-8 text.
 * @return Windows-1252 text, or empty string on error.
 */
string UTF8to1252(const string& utf8)
{
	return MBStoMBS(utf8, CP_UTF8, 1252);
}