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vcmi/lib/filesystem/FileStream.cpp
Konstantin f93c9277c6 lib/filesystem: rename CreateFile to createFile 
In MinGW, there is a define which replaces all CreateFile to
CreateFileA or CreateFileW and breaks compilation. Fix it.
2023-01-25 12:13:34 +03:00

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/*
* FileStream.cpp, part of VCMI engine
*
* Authors: listed in file AUTHORS in main folder
*
* License: GNU General Public License v2.0 or later
* Full text of license available in license.txt file, in main folder
*
*/
#include "StdInc.h"
#include "FileStream.h"
#ifdef USE_SYSTEM_MINIZIP
#include <minizip/unzip.h>
#else
#include "../minizip/unzip.h"
#endif
#include <cstdio>
///copied from ioapi.c due to linker issues on MSVS
#include "../minizip/ioapi.h"
#if defined(__APPLE__) || defined(IOAPI_NO_64)
// In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
#define FTELLO_FUNC(stream) ftello(stream)
#define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
#else
#define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
#define FTELLO_FUNC(stream) ftello64(stream)
#define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
#endif
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) == MAXU32)
return (ZPOS64_T)-1;
else
return tell_uLong;
}
}
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 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 = FOPEN_FUNC((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 ZPOS64_T ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream)
{
ZPOS64_T ret;
ret = FTELLO_FUNC((FILE *)stream);
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 (FSEEKO_FUNC((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;
}
///end of ioapi.c
//extern MINIZIP_EXPORT void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def);
#ifdef VCMI_WINDOWS
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <cwchar>
#define CHAR_LITERAL(s) L##s
using CharType = wchar_t;
#else
#define CHAR_LITERAL(s) s
using CharType = char;
#endif
inline FILE* do_open(const CharType* name, const CharType* mode)
{
#ifdef VCMI_WINDOWS
return _wfopen(name, mode);
#else
return std::fopen(name, mode);
#endif
}
#define GETFILE static_cast<std::FILE*>(filePtr)
voidpf ZCALLBACK MinizipOpenFunc(voidpf opaque, const void* filename, int mode)
{
const CharType* mode_fopen = [mode]() -> const CharType*
{
if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
return CHAR_LITERAL("rb");
else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
return CHAR_LITERAL("r+b");
else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
return CHAR_LITERAL("wb");
return nullptr;
}();
if (filename != nullptr && mode_fopen != nullptr)
return do_open(static_cast<const CharType*>(filename), mode_fopen);
else
return nullptr;
}
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;
}
template struct boost::iostreams::stream<VCMI_LIB_WRAP_NAMESPACE(FileBuf)>;
VCMI_LIB_NAMESPACE_BEGIN
zlib_filefunc64_def* FileStream::GetMinizipFilefunc()
{
static zlib_filefunc64_def MinizipFilefunc;
static bool initialized = false;
if (!initialized)
{
fill_fopen64_filefunc(&MinizipFilefunc);
MinizipFilefunc.zopen64_file = &MinizipOpenFunc;
initialized = true;
}
return &MinizipFilefunc;
}
/*static*/
bool FileStream::createFile(const boost::filesystem::path& filename)
{
FILE* f = do_open(filename.c_str(), CHAR_LITERAL("wb"));
bool result = (f != nullptr);
if(result)
fclose(f);
return result;
}
FileBuf::FileBuf(const boost::filesystem::path& filename, std::ios_base::openmode mode)
{
auto openmode = [mode]() -> std::basic_string<CharType>
{
using namespace std;
switch (mode & (~ios_base::ate & ~ios_base::binary))
{
case (ios_base::in):
return CHAR_LITERAL("r");
case (ios_base::out):
case (ios_base::out | ios_base::trunc):
return CHAR_LITERAL("w");
case (ios_base::app):
case (ios_base::out | ios_base::app):
return CHAR_LITERAL("a");
case (ios_base::out | ios_base::in):
return CHAR_LITERAL("r+");
case (ios_base::out | ios_base::in | ios_base::trunc):
return CHAR_LITERAL("w+");
case (ios_base::out | ios_base::in | ios_base::app):
case (ios_base::in | ios_base::app):
return CHAR_LITERAL("a+");
default:
throw std::ios_base::failure("invalid open mode");
}
}();
if (mode & std::ios_base::binary)
openmode += CHAR_LITERAL('b');
filePtr = do_open(filename.c_str(), openmode.c_str());
if (filePtr == nullptr)
throw std::ios_base::failure("could not open file");
if (mode & std::ios_base::ate) {
if (std::fseek(GETFILE, 0, SEEK_END)) {
fclose(GETFILE);
throw std::ios_base::failure("could not open file");
}
}
}
void FileBuf::close()
{
std::fclose(GETFILE);
}
std::streamsize FileBuf::read(char* s, std::streamsize n)
{
return static_cast<std::streamsize>(std::fread(s, 1, n, GETFILE));
}
std::streamsize FileBuf::write(const char* s, std::streamsize n)
{
return static_cast<std::streamsize>(std::fwrite(s, 1, n, GETFILE));
}
std::streamoff FileBuf::seek(std::streamoff off, std::ios_base::seekdir way)
{
const auto src = [way]() -> int
{
switch(way)
{
case std::ios_base::beg:
return SEEK_SET;
case std::ios_base::cur:
return SEEK_CUR;
case std::ios_base::end:
return SEEK_END;
default:
throw std::ios_base::failure("bad seek direction");
}
}();
if(std::fseek(GETFILE, (long)off, src))
throw std::ios_base::failure("bad seek offset");
return static_cast<std::streamsize>(std::ftell(GETFILE));
}
VCMI_LIB_NAMESPACE_END
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