bullet3/examples/ThirdPartyLibs/minizip/ioapi.c

/* ioapi.h -- IO base function header for compress/uncompress .zip
   part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )

         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )

         Modifications for Zip64 support
         Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )

         For more info read MiniZip_info.txt

*/

#if (defined(_WIN32))
#define _CRT_SECURE_NO_WARNINGS
#endif

#include "ioapi.h"

voidpf call_zopen64(const zlib_filefunc64_32_def* pfilefunc, const void* filename, int mode)
{
	if (pfilefunc->zfile_func64.zopen64_file != NULL)
		return (*(pfilefunc->zfile_func64.zopen64_file))(pfilefunc->zfile_func64.opaque, filename, mode);
	else
	{
		return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque, (const char*)filename, mode);
	}
}

long call_zseek64(const zlib_filefunc64_32_def* pfilefunc, voidpf filestream, ZPOS64_T offset, int origin)
{
	if (pfilefunc->zfile_func64.zseek64_file != NULL)
		return (*(pfilefunc->zfile_func64.zseek64_file))(pfilefunc->zfile_func64.opaque, filestream, offset, origin);
	else
	{
		uLong offsetTruncated = (uLong)offset;
		if (offsetTruncated != offset)
			return -1;
		else
			return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque, filestream, offsetTruncated, origin);
	}
}

ZPOS64_T call_ztell64(const zlib_filefunc64_32_def* pfilefunc, voidpf filestream)
{
	if (pfilefunc->zfile_func64.zseek64_file != NULL)
		return (*(pfilefunc->zfile_func64.ztell64_file))(pfilefunc->zfile_func64.opaque, filestream);
	else
	{
		uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque, filestream);
		if ((tell_uLong) == ((uLong)-1))
			return (ZPOS64_T)-1;
		else
			return tell_uLong;
	}
}

void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32, const zlib_filefunc_def* p_filefunc32)
{
	p_filefunc64_32->zfile_func64.zopen64_file = NULL;
	p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
	p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
	p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
	p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
	p_filefunc64_32->zfile_func64.ztell64_file = NULL;
	p_filefunc64_32->zfile_func64.zseek64_file = NULL;
	p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
	p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
	p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
	p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
	p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
}

static voidpf ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
static uLong ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
static uLong ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf, uLong size));
static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
static long ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
static int ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
static int ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));

static voidpf ZCALLBACK fopen_file_func(voidpf opaque, const char* filename, int mode)
{
	FILE* file = NULL;
	const char* mode_fopen = NULL;
	if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
		mode_fopen = "rb";
	else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
		mode_fopen = "r+b";
	else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
		mode_fopen = "wb";

	if ((filename != NULL) && (mode_fopen != NULL))
		file = fopen(filename, mode_fopen);
	return file;
}

static voidpf ZCALLBACK fopen64_file_func(voidpf opaque, const void* filename, int mode)
{
	FILE* file = NULL;
	const char* mode_fopen = NULL;
	if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
		mode_fopen = "rb";
	else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
		mode_fopen = "r+b";
	else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
		mode_fopen = "wb";

	if ((filename != NULL) && (mode_fopen != NULL))
		//       file = fopen64((const char*)filename, mode_fopen);
		file = fopen((const char*)filename, mode_fopen);

	return file;
}

static uLong ZCALLBACK fread_file_func(voidpf opaque, voidpf stream, void* buf, uLong size)
{
	uLong ret;
	ret = (uLong)fread(buf, 1, (size_t)size, (FILE*)stream);
	return ret;
}

static uLong ZCALLBACK fwrite_file_func(voidpf opaque, voidpf stream, const void* buf, uLong size)
{
	uLong ret;
	ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE*)stream);
	return ret;
}

static long ZCALLBACK ftell_file_func(voidpf opaque, voidpf stream)
{
	long ret;
	ret = ftell((FILE*)stream);
	return ret;
}

static ZPOS64_T ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream)
{
	ZPOS64_T ret;
	ret = ftell((FILE*)stream);

	//    ret = ftello64((FILE *)stream);
	return ret;
}

static long ZCALLBACK fseek_file_func(voidpf opaque, voidpf stream, uLong offset, int origin)
{
	int fseek_origin = 0;
	long ret;
	switch (origin)
	{
		case ZLIB_FILEFUNC_SEEK_CUR:
			fseek_origin = SEEK_CUR;
			break;
		case ZLIB_FILEFUNC_SEEK_END:
			fseek_origin = SEEK_END;
			break;
		case ZLIB_FILEFUNC_SEEK_SET:
			fseek_origin = SEEK_SET;
			break;
		default:
			return -1;
	}
	ret = 0;
	if (fseek((FILE*)stream, offset, fseek_origin) != 0)
		ret = -1;
	return ret;
}

static long ZCALLBACK fseek64_file_func(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
{
	int fseek_origin = 0;
	long ret;
	switch (origin)
	{
		case ZLIB_FILEFUNC_SEEK_CUR:
			fseek_origin = SEEK_CUR;
			break;
		case ZLIB_FILEFUNC_SEEK_END:
			fseek_origin = SEEK_END;
			break;
		case ZLIB_FILEFUNC_SEEK_SET:
			fseek_origin = SEEK_SET;
			break;
		default:
			return -1;
	}
	ret = 0;

	if (fseek((FILE*)stream, offset, fseek_origin) != 0)

		//    if(fseeko64((FILE *)stream, offset, fseek_origin) != 0)
		ret = -1;

	return ret;
}

static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream)
{
	int ret;
	ret = fclose((FILE*)stream);
	return ret;
}

static int ZCALLBACK ferror_file_func(voidpf opaque, voidpf stream)
{
	int ret;
	ret = ferror((FILE*)stream);
	return ret;
}

void fill_fopen_filefunc(pzlib_filefunc_def)
	zlib_filefunc_def* pzlib_filefunc_def;
{
	pzlib_filefunc_def->zopen_file = fopen_file_func;
	pzlib_filefunc_def->zread_file = fread_file_func;
	pzlib_filefunc_def->zwrite_file = fwrite_file_func;
	pzlib_filefunc_def->ztell_file = ftell_file_func;
	pzlib_filefunc_def->zseek_file = fseek_file_func;
	pzlib_filefunc_def->zclose_file = fclose_file_func;
	pzlib_filefunc_def->zerror_file = ferror_file_func;
	pzlib_filefunc_def->opaque = NULL;
}

void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def)
{
	pzlib_filefunc_def->zopen64_file = fopen64_file_func;
	pzlib_filefunc_def->zread_file = fread_file_func;
	pzlib_filefunc_def->zwrite_file = fwrite_file_func;
	pzlib_filefunc_def->ztell64_file = ftell64_file_func;
	pzlib_filefunc_def->zseek64_file = fseek64_file_func;
	pzlib_filefunc_def->zclose_file = fclose_file_func;
	pzlib_filefunc_def->zerror_file = ferror_file_func;
	pzlib_filefunc_def->opaque = NULL;
}