| /* ioapi.c -- IO base function header for compress/uncompress .zip |
| files using zlib + zip or unzip API |
| |
| Version 1.01e, February 12th, 2005 |
| |
| Copyright (C) 1998-2005 Gilles Vollant |
| */ |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| |
| #include "zlib.h" |
| #include "ioapi.h" |
| |
| |
| |
| /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */ |
| |
| #ifndef SEEK_CUR |
| #define SEEK_CUR 1 |
| #endif |
| |
| #ifndef SEEK_END |
| #define SEEK_END 2 |
| #endif |
| |
| #ifndef SEEK_SET |
| #define SEEK_SET 0 |
| #endif |
| |
| voidpf ZCALLBACK fopen_file_func OF(( |
| voidpf opaque, |
| const char* filename, |
| int mode)); |
| |
| uLong ZCALLBACK fread_file_func OF(( |
| voidpf opaque, |
| voidpf stream, |
| void* buf, |
| uLong size)); |
| |
| uLong ZCALLBACK fwrite_file_func OF(( |
| voidpf opaque, |
| voidpf stream, |
| const void* buf, |
| uLong size)); |
| |
| long ZCALLBACK ftell_file_func OF(( |
| voidpf opaque, |
| voidpf stream)); |
| |
| long ZCALLBACK fseek_file_func OF(( |
| voidpf opaque, |
| voidpf stream, |
| uLong offset, |
| int origin)); |
| |
| int ZCALLBACK fclose_file_func OF(( |
| voidpf opaque, |
| voidpf stream)); |
| |
| int ZCALLBACK ferror_file_func OF(( |
| voidpf opaque, |
| voidpf stream)); |
| |
| |
| voidpf ZCALLBACK fopen_file_func (opaque, filename, mode) |
| voidpf opaque; |
| const char* filename; |
| int mode; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| 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; |
| } |
| |
| |
| uLong ZCALLBACK fread_file_func (opaque, stream, buf, size) |
| voidpf opaque; |
| voidpf stream; |
| void* buf; |
| uLong size; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| uLong ret; |
| ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream); |
| return ret; |
| } |
| |
| |
| uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size) |
| voidpf opaque; |
| voidpf stream; |
| const void* buf; |
| uLong size; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| uLong ret; |
| ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream); |
| return ret; |
| } |
| |
| long ZCALLBACK ftell_file_func (opaque, stream) |
| voidpf opaque; |
| voidpf stream; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| long ret; |
| ret = ftell((FILE *)stream); |
| return ret; |
| } |
| |
| long ZCALLBACK fseek_file_func (opaque, stream, offset, origin) |
| voidpf opaque; |
| voidpf stream; |
| uLong offset; |
| int origin; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| 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; |
| fseek((FILE *)stream, offset, fseek_origin); |
| return ret; |
| } |
| |
| int ZCALLBACK fclose_file_func (opaque, stream) |
| voidpf opaque; |
| voidpf stream; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| int ret; |
| ret = fclose((FILE *)stream); |
| return ret; |
| } |
| |
| int ZCALLBACK ferror_file_func (opaque, stream) |
| voidpf opaque; |
| voidpf stream; |
| { |
| (void) opaque; /* avoid "unused parameter" warning */ |
| 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; |
| } |