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Basic UTF-8 support in ansi build so it can read UTF-8 .nlf files and LangStrings

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git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@6196 212acab6-be3b-0410-9dea-997c60f758d6
This commit is contained in:
anders_k 2011-12-05 23:44:26 +00:00
parent 359ad0a055
commit ef8a83bd41
10 changed files with 227 additions and 5 deletions
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Source/utf.cpp Normal file
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/*
* utf.cpp
*
* This file is a part of NSIS.
*
* Copyright (C) 2011 Anders Kjersem
*
* Licensed under the zlib/libpng license (the "License");
* you may not use this file except in compliance with the License.
*
* Licence details can be found in the file COPYING.
*
* This software is provided 'as-is', without any express or implied
* warranty.
*
*/
#include "utf.h"
// BUGBUG: We might want to use MB_ERR_INVALID_CHARS but it is not supported
// on < WinXP or in our current POSIX implementation.
static const int UTF8MBTWCFLAGS = 0;
#define ExeHeadWStrFree free
static EXEHEADWCHAR_T* ExeHeadWStrAlloc(UINT cch)
{
EXEHEADWCHAR_T* s = (EXEHEADWCHAR_T*) malloc(cch*sizeof(EXEHEADWCHAR_T));
#if 0
// TODO: We should add POSIX versions of G/SetLastError
// if we want to tell _why_ UTF8ToExeHeadTStr failed...
if (!s) SetLastError(ERROR_OUTOFMEMORY);
#endif
return s;
}
#ifdef _UNICODE
#else // !_UNICODE
EXEHEADTCHAR_T* UTF8ToExeHeadTStr(LPCSTR StrU8,UINT Codepage)
{
int cchW = MultiByteToWideChar(CP_UTF8,UTF8MBTWCFLAGS,StrU8,-1,NULL,0);
if (!cchW) return NULL;
WCHAR *bufWStr = (WCHAR*) ExeHeadWStrAlloc(cchW);
if (!bufWStr) return NULL;
EXEHEADTCHAR_T *outstr = NULL;
if (MultiByteToWideChar(CP_UTF8,UTF8MBTWCFLAGS,StrU8,-1,bufWStr,cchW))
{
int cbA = WideCharToMultiByte(Codepage,0,bufWStr,cchW,NULL,0,NULL,NULL);
if (cbA && (outstr = ExeHeadTStrAlloc(cbA)))
{
if (!WideCharToMultiByte(Codepage,0,bufWStr,cchW,outstr,cbA,NULL,NULL))
{
ExeHeadTStrFree(outstr);
outstr = NULL;
}
}
}
ExeHeadWStrFree(bufWStr);
return outstr;
}
#endif // ?_UNICODE
bool IsUTF8BOM(FILE*fstrm)
{
// ungetc is only guaranteed to support 1 pushback,
// lets hope no ASCII file starts with 0xEF and is not a BOM!
const int c = fgetc(fstrm);
if (EOF == c) return false;
if (0xef == c)
{
const int c2 = fgetc(fstrm);
if (0xbb == c2)
{
const int c3 = fgetc(fstrm);
if (0xbf == c3) return true;
ungetc(c3,fstrm);
}
ungetc(c2,fstrm);
}
ungetc(c,fstrm);
return false;
}