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Define bridge interface to minizip IOAPI

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AlexVinS
2015-08-11 14:44:47 +03:00
committed by AlexVinS
parent 8f209b17b6
commit b3ac146ba9
8 changed files with 159 additions and 6 deletions
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106
lib/filesystem/MinizipExtensions.cpp Normal file
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/*
* MinizipExtensions.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 "MinizipExtensions.h"
static voidpf ZCALLBACK openFileProxy(voidpf opaque, const void * filename, int mode)
{
assert(opaque != nullptr);
std::string filename_s;
if(filename != nullptr)
filename_s = (const char *)filename;
return ((CIOApi *)opaque)->openFile(filename_s, mode);
}
static uLong ZCALLBACK readFileProxy(voidpf opaque, voidpf stream, void * buf, uLong size)
{
assert(opaque != nullptr);
assert(stream != nullptr);
CInputOutputStream * actualStream = static_cast<CInputOutputStream *>(stream);
return actualStream->read((ui8 *)buf, size);
}
static uLong ZCALLBACK writeFileProxy(voidpf opaque, voidpf stream, const void * buf, uLong size)
{
assert(opaque != nullptr);
assert(stream != nullptr);
CInputOutputStream * actualStream = static_cast<CInputOutputStream *>(stream);
return (uLong)actualStream->write((const ui8 *)buf, size);
}
static ZPOS64_T ZCALLBACK tellFileProxy(voidpf opaque, voidpf stream)
{
assert(opaque != nullptr);
assert(stream != nullptr);
CInputOutputStream * actualStream = static_cast<CInputOutputStream *>(stream);
return actualStream->tell();
}
static long ZCALLBACK seekFileProxy(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
{
assert(opaque != nullptr);
assert(stream != nullptr);
CInputOutputStream * actualStream = static_cast<CInputOutputStream *>(stream);
long ret = 0;
switch (origin)
{
case ZLIB_FILEFUNC_SEEK_CUR :
actualStream->skip(offset);//TODO: should we check actual skipped?
break;
case ZLIB_FILEFUNC_SEEK_END :
ret = -1;
break;
case ZLIB_FILEFUNC_SEEK_SET :
ret = actualStream->seek(offset);
break;
default: ret = -1;
}
return ret;
}
static int ZCALLBACK closeFileProxy(voidpf opaque, voidpf stream)
{
assert(opaque != nullptr);
assert(stream != nullptr);
CInputOutputStream * actualStream = static_cast<CInputOutputStream *>(stream);
delete actualStream;
return 0;
}
static int ZCALLBACK errorFileProxy(voidpf opaque, voidpf stream)
{
return 0;
}
void CIOApi::fillApiStructure(zlib_filefunc64_def & api)
{
api.opaque = this;
api.zopen64_file = &openFileProxy;
api.zread_file = &readFileProxy;
api.zwrite_file = &writeFileProxy;
api.ztell64_file = &tellFileProxy;
api.zseek64_file = &seekFileProxy;
api.zclose_file = &closeFileProxy;
api.zerror_file = &errorFileProxy;
}