cannam@128: /* iowin32.c -- IO base function header for compress/uncompress .zip
cannam@128:      Version 1.1, February 14h, 2010
cannam@128:      part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
cannam@128: 
cannam@128:          Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
cannam@128: 
cannam@128:          Modifications for Zip64 support
cannam@128:          Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
cannam@128: 
cannam@128:      For more info read MiniZip_info.txt
cannam@128: 
cannam@128: */
cannam@128: 
cannam@128: #include <stdlib.h>
cannam@128: 
cannam@128: #include "zlib.h"
cannam@128: #include "ioapi.h"
cannam@128: #include "iowin32.h"
cannam@128: 
cannam@128: #ifndef INVALID_HANDLE_VALUE
cannam@128: #define INVALID_HANDLE_VALUE (0xFFFFFFFF)
cannam@128: #endif
cannam@128: 
cannam@128: #ifndef INVALID_SET_FILE_POINTER
cannam@128: #define INVALID_SET_FILE_POINTER ((DWORD)-1)
cannam@128: #endif
cannam@128: 
cannam@128: 
cannam@128: #if defined(WINAPI_FAMILY_PARTITION) && (!(defined(IOWIN32_USING_WINRT_API)))
cannam@128: #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_APP)
cannam@128: #define IOWIN32_USING_WINRT_API 1
cannam@128: #endif
cannam@128: #endif
cannam@128: 
cannam@128: voidpf  ZCALLBACK win32_open_file_func  OF((voidpf opaque, const char* filename, int mode));
cannam@128: uLong   ZCALLBACK win32_read_file_func  OF((voidpf opaque, voidpf stream, void* buf, uLong size));
cannam@128: uLong   ZCALLBACK win32_write_file_func OF((voidpf opaque, voidpf stream, const void* buf, uLong size));
cannam@128: ZPOS64_T ZCALLBACK win32_tell64_file_func  OF((voidpf opaque, voidpf stream));
cannam@128: long    ZCALLBACK win32_seek64_file_func  OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
cannam@128: int     ZCALLBACK win32_close_file_func OF((voidpf opaque, voidpf stream));
cannam@128: int     ZCALLBACK win32_error_file_func OF((voidpf opaque, voidpf stream));
cannam@128: 
cannam@128: typedef struct
cannam@128: {
cannam@128:     HANDLE hf;
cannam@128:     int error;
cannam@128: } WIN32FILE_IOWIN;
cannam@128: 
cannam@128: 
cannam@128: static void win32_translate_open_mode(int mode,
cannam@128:                                       DWORD* lpdwDesiredAccess,
cannam@128:                                       DWORD* lpdwCreationDisposition,
cannam@128:                                       DWORD* lpdwShareMode,
cannam@128:                                       DWORD* lpdwFlagsAndAttributes)
cannam@128: {
cannam@128:     *lpdwDesiredAccess = *lpdwShareMode = *lpdwFlagsAndAttributes = *lpdwCreationDisposition = 0;
cannam@128: 
cannam@128:     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
cannam@128:     {
cannam@128:         *lpdwDesiredAccess = GENERIC_READ;
cannam@128:         *lpdwCreationDisposition = OPEN_EXISTING;
cannam@128:         *lpdwShareMode = FILE_SHARE_READ;
cannam@128:     }
cannam@128:     else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
cannam@128:     {
cannam@128:         *lpdwDesiredAccess = GENERIC_WRITE | GENERIC_READ;
cannam@128:         *lpdwCreationDisposition = OPEN_EXISTING;
cannam@128:     }
cannam@128:     else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
cannam@128:     {
cannam@128:         *lpdwDesiredAccess = GENERIC_WRITE | GENERIC_READ;
cannam@128:         *lpdwCreationDisposition = CREATE_ALWAYS;
cannam@128:     }
cannam@128: }
cannam@128: 
cannam@128: static voidpf win32_build_iowin(HANDLE hFile)
cannam@128: {
cannam@128:     voidpf ret=NULL;
cannam@128: 
cannam@128:     if ((hFile != NULL) && (hFile != INVALID_HANDLE_VALUE))
cannam@128:     {
cannam@128:         WIN32FILE_IOWIN w32fiow;
cannam@128:         w32fiow.hf = hFile;
cannam@128:         w32fiow.error = 0;
cannam@128:         ret = malloc(sizeof(WIN32FILE_IOWIN));
cannam@128: 
cannam@128:         if (ret==NULL)
cannam@128:             CloseHandle(hFile);
cannam@128:         else
cannam@128:             *((WIN32FILE_IOWIN*)ret) = w32fiow;
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: voidpf ZCALLBACK win32_open64_file_func (voidpf opaque,const void* filename,int mode)
cannam@128: {
cannam@128:     const char* mode_fopen = NULL;
cannam@128:     DWORD dwDesiredAccess,dwCreationDisposition,dwShareMode,dwFlagsAndAttributes ;
cannam@128:     HANDLE hFile = NULL;
cannam@128: 
cannam@128:     win32_translate_open_mode(mode,&dwDesiredAccess,&dwCreationDisposition,&dwShareMode,&dwFlagsAndAttributes);
cannam@128: 
cannam@128: #ifdef IOWIN32_USING_WINRT_API
cannam@128: #ifdef UNICODE
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFile2((LPCTSTR)filename, dwDesiredAccess, dwShareMode, dwCreationDisposition, NULL);
cannam@128: #else
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:     {
cannam@128:         WCHAR filenameW[FILENAME_MAX + 0x200 + 1];
cannam@128:         MultiByteToWideChar(CP_ACP,0,(const char*)filename,-1,filenameW,FILENAME_MAX + 0x200);
cannam@128:         hFile = CreateFile2(filenameW, dwDesiredAccess, dwShareMode, dwCreationDisposition, NULL);
cannam@128:     }
cannam@128: #endif
cannam@128: #else
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFile((LPCTSTR)filename, dwDesiredAccess, dwShareMode, NULL, dwCreationDisposition, dwFlagsAndAttributes, NULL);
cannam@128: #endif
cannam@128: 
cannam@128:     return win32_build_iowin(hFile);
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: voidpf ZCALLBACK win32_open64_file_funcA (voidpf opaque,const void* filename,int mode)
cannam@128: {
cannam@128:     const char* mode_fopen = NULL;
cannam@128:     DWORD dwDesiredAccess,dwCreationDisposition,dwShareMode,dwFlagsAndAttributes ;
cannam@128:     HANDLE hFile = NULL;
cannam@128: 
cannam@128:     win32_translate_open_mode(mode,&dwDesiredAccess,&dwCreationDisposition,&dwShareMode,&dwFlagsAndAttributes);
cannam@128: 
cannam@128: #ifdef IOWIN32_USING_WINRT_API
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:     {
cannam@128:         WCHAR filenameW[FILENAME_MAX + 0x200 + 1];
cannam@128:         MultiByteToWideChar(CP_ACP,0,(const char*)filename,-1,filenameW,FILENAME_MAX + 0x200);
cannam@128:         hFile = CreateFile2(filenameW, dwDesiredAccess, dwShareMode, dwCreationDisposition, NULL);
cannam@128:     }
cannam@128: #else
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFileA((LPCSTR)filename, dwDesiredAccess, dwShareMode, NULL, dwCreationDisposition, dwFlagsAndAttributes, NULL);
cannam@128: #endif
cannam@128: 
cannam@128:     return win32_build_iowin(hFile);
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: voidpf ZCALLBACK win32_open64_file_funcW (voidpf opaque,const void* filename,int mode)
cannam@128: {
cannam@128:     const char* mode_fopen = NULL;
cannam@128:     DWORD dwDesiredAccess,dwCreationDisposition,dwShareMode,dwFlagsAndAttributes ;
cannam@128:     HANDLE hFile = NULL;
cannam@128: 
cannam@128:     win32_translate_open_mode(mode,&dwDesiredAccess,&dwCreationDisposition,&dwShareMode,&dwFlagsAndAttributes);
cannam@128: 
cannam@128: #ifdef IOWIN32_USING_WINRT_API
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFile2((LPCWSTR)filename, dwDesiredAccess, dwShareMode, dwCreationDisposition,NULL);
cannam@128: #else
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFileW((LPCWSTR)filename, dwDesiredAccess, dwShareMode, NULL, dwCreationDisposition, dwFlagsAndAttributes, NULL);
cannam@128: #endif
cannam@128: 
cannam@128:     return win32_build_iowin(hFile);
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: voidpf ZCALLBACK win32_open_file_func (voidpf opaque,const char* filename,int mode)
cannam@128: {
cannam@128:     const char* mode_fopen = NULL;
cannam@128:     DWORD dwDesiredAccess,dwCreationDisposition,dwShareMode,dwFlagsAndAttributes ;
cannam@128:     HANDLE hFile = NULL;
cannam@128: 
cannam@128:     win32_translate_open_mode(mode,&dwDesiredAccess,&dwCreationDisposition,&dwShareMode,&dwFlagsAndAttributes);
cannam@128: 
cannam@128: #ifdef IOWIN32_USING_WINRT_API
cannam@128: #ifdef UNICODE
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFile2((LPCTSTR)filename, dwDesiredAccess, dwShareMode, dwCreationDisposition, NULL);
cannam@128: #else
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:     {
cannam@128:         WCHAR filenameW[FILENAME_MAX + 0x200 + 1];
cannam@128:         MultiByteToWideChar(CP_ACP,0,(const char*)filename,-1,filenameW,FILENAME_MAX + 0x200);
cannam@128:         hFile = CreateFile2(filenameW, dwDesiredAccess, dwShareMode, dwCreationDisposition, NULL);
cannam@128:     }
cannam@128: #endif
cannam@128: #else
cannam@128:     if ((filename!=NULL) && (dwDesiredAccess != 0))
cannam@128:         hFile = CreateFile((LPCTSTR)filename, dwDesiredAccess, dwShareMode, NULL, dwCreationDisposition, dwFlagsAndAttributes, NULL);
cannam@128: #endif
cannam@128: 
cannam@128:     return win32_build_iowin(hFile);
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: uLong ZCALLBACK win32_read_file_func (voidpf opaque, voidpf stream, void* buf,uLong size)
cannam@128: {
cannam@128:     uLong ret=0;
cannam@128:     HANDLE hFile = NULL;
cannam@128:     if (stream!=NULL)
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
cannam@128: 
cannam@128:     if (hFile != NULL)
cannam@128:     {
cannam@128:         if (!ReadFile(hFile, buf, size, &ret, NULL))
cannam@128:         {
cannam@128:             DWORD dwErr = GetLastError();
cannam@128:             if (dwErr == ERROR_HANDLE_EOF)
cannam@128:                 dwErr = 0;
cannam@128:             ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
cannam@128:         }
cannam@128:     }
cannam@128: 
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: uLong ZCALLBACK win32_write_file_func (voidpf opaque,voidpf stream,const void* buf,uLong size)
cannam@128: {
cannam@128:     uLong ret=0;
cannam@128:     HANDLE hFile = NULL;
cannam@128:     if (stream!=NULL)
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
cannam@128: 
cannam@128:     if (hFile != NULL)
cannam@128:     {
cannam@128:         if (!WriteFile(hFile, buf, size, &ret, NULL))
cannam@128:         {
cannam@128:             DWORD dwErr = GetLastError();
cannam@128:             if (dwErr == ERROR_HANDLE_EOF)
cannam@128:                 dwErr = 0;
cannam@128:             ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
cannam@128:         }
cannam@128:     }
cannam@128: 
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: static BOOL MySetFilePointerEx(HANDLE hFile, LARGE_INTEGER pos, LARGE_INTEGER *newPos,  DWORD dwMoveMethod)
cannam@128: {
cannam@128: #ifdef IOWIN32_USING_WINRT_API
cannam@128:     return SetFilePointerEx(hFile, pos, newPos, dwMoveMethod);
cannam@128: #else
cannam@128:     LONG lHigh = pos.HighPart;
cannam@128:     DWORD dwNewPos = SetFilePointer(hFile, pos.LowPart, &lHigh, FILE_CURRENT);
cannam@128:     BOOL fOk = TRUE;
cannam@128:     if (dwNewPos == 0xFFFFFFFF)
cannam@128:         if (GetLastError() != NO_ERROR)
cannam@128:             fOk = FALSE;
cannam@128:     if ((newPos != NULL) && (fOk))
cannam@128:     {
cannam@128:         newPos->LowPart = dwNewPos;
cannam@128:         newPos->HighPart = lHigh;
cannam@128:     }
cannam@128:     return fOk;
cannam@128: #endif
cannam@128: }
cannam@128: 
cannam@128: long ZCALLBACK win32_tell_file_func (voidpf opaque,voidpf stream)
cannam@128: {
cannam@128:     long ret=-1;
cannam@128:     HANDLE hFile = NULL;
cannam@128:     if (stream!=NULL)
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
cannam@128:     if (hFile != NULL)
cannam@128:     {
cannam@128:         LARGE_INTEGER pos;
cannam@128:         pos.QuadPart = 0;
cannam@128: 
cannam@128:         if (!MySetFilePointerEx(hFile, pos, &pos, FILE_CURRENT))
cannam@128:         {
cannam@128:             DWORD dwErr = GetLastError();
cannam@128:             ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
cannam@128:             ret = -1;
cannam@128:         }
cannam@128:         else
cannam@128:             ret=(long)pos.LowPart;
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: ZPOS64_T ZCALLBACK win32_tell64_file_func (voidpf opaque, voidpf stream)
cannam@128: {
cannam@128:     ZPOS64_T ret= (ZPOS64_T)-1;
cannam@128:     HANDLE hFile = NULL;
cannam@128:     if (stream!=NULL)
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream)->hf;
cannam@128: 
cannam@128:     if (hFile)
cannam@128:     {
cannam@128:         LARGE_INTEGER pos;
cannam@128:         pos.QuadPart = 0;
cannam@128: 
cannam@128:         if (!MySetFilePointerEx(hFile, pos, &pos, FILE_CURRENT))
cannam@128:         {
cannam@128:             DWORD dwErr = GetLastError();
cannam@128:             ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
cannam@128:             ret = (ZPOS64_T)-1;
cannam@128:         }
cannam@128:         else
cannam@128:             ret=pos.QuadPart;
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: long ZCALLBACK win32_seek_file_func (voidpf opaque,voidpf stream,uLong offset,int origin)
cannam@128: {
cannam@128:     DWORD dwMoveMethod=0xFFFFFFFF;
cannam@128:     HANDLE hFile = NULL;
cannam@128: 
cannam@128:     long ret=-1;
cannam@128:     if (stream!=NULL)
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
cannam@128:     switch (origin)
cannam@128:     {
cannam@128:     case ZLIB_FILEFUNC_SEEK_CUR :
cannam@128:         dwMoveMethod = FILE_CURRENT;
cannam@128:         break;
cannam@128:     case ZLIB_FILEFUNC_SEEK_END :
cannam@128:         dwMoveMethod = FILE_END;
cannam@128:         break;
cannam@128:     case ZLIB_FILEFUNC_SEEK_SET :
cannam@128:         dwMoveMethod = FILE_BEGIN;
cannam@128:         break;
cannam@128:     default: return -1;
cannam@128:     }
cannam@128: 
cannam@128:     if (hFile != NULL)
cannam@128:     {
cannam@128:         LARGE_INTEGER pos;
cannam@128:         pos.QuadPart = offset;
cannam@128:         if (!MySetFilePointerEx(hFile, pos, NULL, dwMoveMethod))
cannam@128:         {
cannam@128:             DWORD dwErr = GetLastError();
cannam@128:             ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
cannam@128:             ret = -1;
cannam@128:         }
cannam@128:         else
cannam@128:             ret=0;
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: long ZCALLBACK win32_seek64_file_func (voidpf opaque, voidpf stream,ZPOS64_T offset,int origin)
cannam@128: {
cannam@128:     DWORD dwMoveMethod=0xFFFFFFFF;
cannam@128:     HANDLE hFile = NULL;
cannam@128:     long ret=-1;
cannam@128: 
cannam@128:     if (stream!=NULL)
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream)->hf;
cannam@128: 
cannam@128:     switch (origin)
cannam@128:     {
cannam@128:         case ZLIB_FILEFUNC_SEEK_CUR :
cannam@128:             dwMoveMethod = FILE_CURRENT;
cannam@128:             break;
cannam@128:         case ZLIB_FILEFUNC_SEEK_END :
cannam@128:             dwMoveMethod = FILE_END;
cannam@128:             break;
cannam@128:         case ZLIB_FILEFUNC_SEEK_SET :
cannam@128:             dwMoveMethod = FILE_BEGIN;
cannam@128:             break;
cannam@128:         default: return -1;
cannam@128:     }
cannam@128: 
cannam@128:     if (hFile)
cannam@128:     {
cannam@128:         LARGE_INTEGER pos;
cannam@128:         pos.QuadPart = offset;
cannam@128:         if (!MySetFilePointerEx(hFile, pos, NULL, FILE_CURRENT))
cannam@128:         {
cannam@128:             DWORD dwErr = GetLastError();
cannam@128:             ((WIN32FILE_IOWIN*)stream) -> error=(int)dwErr;
cannam@128:             ret = -1;
cannam@128:         }
cannam@128:         else
cannam@128:             ret=0;
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: int ZCALLBACK win32_close_file_func (voidpf opaque, voidpf stream)
cannam@128: {
cannam@128:     int ret=-1;
cannam@128: 
cannam@128:     if (stream!=NULL)
cannam@128:     {
cannam@128:         HANDLE hFile;
cannam@128:         hFile = ((WIN32FILE_IOWIN*)stream) -> hf;
cannam@128:         if (hFile != NULL)
cannam@128:         {
cannam@128:             CloseHandle(hFile);
cannam@128:             ret=0;
cannam@128:         }
cannam@128:         free(stream);
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: int ZCALLBACK win32_error_file_func (voidpf opaque,voidpf stream)
cannam@128: {
cannam@128:     int ret=-1;
cannam@128:     if (stream!=NULL)
cannam@128:     {
cannam@128:         ret = ((WIN32FILE_IOWIN*)stream) -> error;
cannam@128:     }
cannam@128:     return ret;
cannam@128: }
cannam@128: 
cannam@128: void fill_win32_filefunc (zlib_filefunc_def* pzlib_filefunc_def)
cannam@128: {
cannam@128:     pzlib_filefunc_def->zopen_file = win32_open_file_func;
cannam@128:     pzlib_filefunc_def->zread_file = win32_read_file_func;
cannam@128:     pzlib_filefunc_def->zwrite_file = win32_write_file_func;
cannam@128:     pzlib_filefunc_def->ztell_file = win32_tell_file_func;
cannam@128:     pzlib_filefunc_def->zseek_file = win32_seek_file_func;
cannam@128:     pzlib_filefunc_def->zclose_file = win32_close_file_func;
cannam@128:     pzlib_filefunc_def->zerror_file = win32_error_file_func;
cannam@128:     pzlib_filefunc_def->opaque = NULL;
cannam@128: }
cannam@128: 
cannam@128: void fill_win32_filefunc64(zlib_filefunc64_def* pzlib_filefunc_def)
cannam@128: {
cannam@128:     pzlib_filefunc_def->zopen64_file = win32_open64_file_func;
cannam@128:     pzlib_filefunc_def->zread_file = win32_read_file_func;
cannam@128:     pzlib_filefunc_def->zwrite_file = win32_write_file_func;
cannam@128:     pzlib_filefunc_def->ztell64_file = win32_tell64_file_func;
cannam@128:     pzlib_filefunc_def->zseek64_file = win32_seek64_file_func;
cannam@128:     pzlib_filefunc_def->zclose_file = win32_close_file_func;
cannam@128:     pzlib_filefunc_def->zerror_file = win32_error_file_func;
cannam@128:     pzlib_filefunc_def->opaque = NULL;
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: void fill_win32_filefunc64A(zlib_filefunc64_def* pzlib_filefunc_def)
cannam@128: {
cannam@128:     pzlib_filefunc_def->zopen64_file = win32_open64_file_funcA;
cannam@128:     pzlib_filefunc_def->zread_file = win32_read_file_func;
cannam@128:     pzlib_filefunc_def->zwrite_file = win32_write_file_func;
cannam@128:     pzlib_filefunc_def->ztell64_file = win32_tell64_file_func;
cannam@128:     pzlib_filefunc_def->zseek64_file = win32_seek64_file_func;
cannam@128:     pzlib_filefunc_def->zclose_file = win32_close_file_func;
cannam@128:     pzlib_filefunc_def->zerror_file = win32_error_file_func;
cannam@128:     pzlib_filefunc_def->opaque = NULL;
cannam@128: }
cannam@128: 
cannam@128: 
cannam@128: void fill_win32_filefunc64W(zlib_filefunc64_def* pzlib_filefunc_def)
cannam@128: {
cannam@128:     pzlib_filefunc_def->zopen64_file = win32_open64_file_funcW;
cannam@128:     pzlib_filefunc_def->zread_file = win32_read_file_func;
cannam@128:     pzlib_filefunc_def->zwrite_file = win32_write_file_func;
cannam@128:     pzlib_filefunc_def->ztell64_file = win32_tell64_file_func;
cannam@128:     pzlib_filefunc_def->zseek64_file = win32_seek64_file_func;
cannam@128:     pzlib_filefunc_def->zclose_file = win32_close_file_func;
cannam@128:     pzlib_filefunc_def->zerror_file = win32_error_file_func;
cannam@128:     pzlib_filefunc_def->opaque = NULL;
cannam@128: }