ioapi.c
上传用户:maxiaolivb
上传日期:2022-06-07
资源大小:915k
文件大小:3k
- /* ioapi.c -- IO base function header for compress/uncompress .zip
- files using zlib + zip or unzip API
- Version 1.01, May 8th, 2004
- Copyright (C) 1998-2004 Gilles Vollant
- */
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include "zlib.h"
- #include "ioapi.h"
- void *ZCALLBACK fopen_file_func(void *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;
- }
- //-------------------------------------------------------------------------
- DWORD ZCALLBACK fread_file_func(void *opaque, void *stream, void *buf, DWORD size)
- {
- return fread(buf, 1, (size_t)size, (FILE*)stream);
- }
- //-------------------------------------------------------------------------
- DWORD ZCALLBACK fwrite_file_func(void *opaque, void *stream, const void *buf, DWORD size)
- {
- return fwrite(buf, 1, (size_t)size, (FILE*)stream);
- }
- //-------------------------------------------------------------------------
- long ZCALLBACK ftell_file_func(void *opaque, void *stream)
- {
- return ftell((FILE*)stream);
- }
- //-------------------------------------------------------------------------
- long ZCALLBACK fseek_file_func(void *opaque, void *stream, DWORD offset, int origin)
- {
- fseek((FILE*)stream, offset, origin);
- return 0;
- }
- //-------------------------------------------------------------------------
- int ZCALLBACK fclose_file_func(void *opaque, void *stream)
- {
- return fclose((FILE*)stream);
- }
- //-------------------------------------------------------------------------
- int ZCALLBACK ferror_file_func(void *opaque, void *stream)
- {
- return ferror((FILE*)stream);
- }
- //-------------------------------------------------------------------------
- void fill_fopen_filefunc(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;
- }