utils/themeeditor/quazip/ioapi.c

   1 /* ioapi.c -- IO base function header for compress/uncompress .zip
   2    files using zlib + zip or unzip API
   3
   4    Version 1.01e, February 12th, 2005
   5
   6    Copyright (C) 1998-2005 Gilles Vollant
   7 */
   8
   9 #include <stdio.h>
  10 #include <stdlib.h>
  11 #include <string.h>
  12
  13 #include "zlib.h"
  14 #include "ioapi.h"
  15
  16
  17
  18 /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
  19
  20 #ifndef SEEK_CUR
  21 #define SEEK_CUR    1
  22 #endif
  23
  24 #ifndef SEEK_END
  25 #define SEEK_END    2
  26 #endif
  27
  28 #ifndef SEEK_SET
  29 #define SEEK_SET    0
  30 #endif
  31
  32 voidpf ZCALLBACK fopen_file_func OF((
  33    voidpf opaque,
  34    const char* filename,
  35    int mode));
  36
  37 uLong ZCALLBACK fread_file_func OF((
  38    voidpf opaque,
  39    voidpf stream,
  40    void* buf,
  41    uLong size));
  42
  43 uLong ZCALLBACK fwrite_file_func OF((
  44    voidpf opaque,
  45    voidpf stream,
  46    const void* buf,
  47    uLong size));
  48
  49 long ZCALLBACK ftell_file_func OF((
  50    voidpf opaque,
  51    voidpf stream));
  52
  53 long ZCALLBACK fseek_file_func OF((
  54    voidpf opaque,
  55    voidpf stream,
  56    uLong offset,
  57    int origin));
  58
  59 int ZCALLBACK fclose_file_func OF((
  60    voidpf opaque,
  61    voidpf stream));
  62
  63 int ZCALLBACK ferror_file_func OF((
  64    voidpf opaque,
  65    voidpf stream));
  66
  67
  68 voidpf ZCALLBACK fopen_file_func (opaque, filename, mode)
  69    voidpf opaque;
  70    const char* filename;
  71    int mode;
  72 {
  73     (void) opaque; /* avoid "unused parameter" warning */
  74     FILE* file = NULL;
  75     const char* mode_fopen = NULL;
  76     if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
  77         mode_fopen = "rb";
  78     else
  79     if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
  80         mode_fopen = "r+b";
  81     else
  82     if (mode & ZLIB_FILEFUNC_MODE_CREATE)
  83         mode_fopen = "wb";
  84
  85     if ((filename!=NULL) && (mode_fopen != NULL))
  86         file = fopen(filename, mode_fopen);
  87     return file;
  88 }
  89
  90
  91 uLong ZCALLBACK fread_file_func (opaque, stream, buf, size)
  92    voidpf opaque;
  93    voidpf stream;
  94    void* buf;
  95    uLong size;
  96 {
  97     (void) opaque; /* avoid "unused parameter" warning */
  98     uLong ret;
  99     ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
 100     return ret;
 101 }
 102
 103
 104 uLong ZCALLBACK fwrite_file_func (opaque, stream, buf, size)
 105    voidpf opaque;
 106    voidpf stream;
 107    const void* buf;
 108    uLong size;
 109 {
 110     (void) opaque; /* avoid "unused parameter" warning */
 111     uLong ret;
 112     ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
 113     return ret;
 114 }
 115
 116 long ZCALLBACK ftell_file_func (opaque, stream)
 117    voidpf opaque;
 118    voidpf stream;
 119 {
 120     (void) opaque; /* avoid "unused parameter" warning */
 121     long ret;
 122     ret = ftell((FILE *)stream);
 123     return ret;
 124 }
 125
 126 long ZCALLBACK fseek_file_func (opaque, stream, offset, origin)
 127    voidpf opaque;
 128    voidpf stream;
 129    uLong offset;
 130    int origin;
 131 {
 132     (void) opaque; /* avoid "unused parameter" warning */
 133     int fseek_origin=0;
 134     long ret;
 135     switch (origin)
 136     {
 137     case ZLIB_FILEFUNC_SEEK_CUR :
 138         fseek_origin = SEEK_CUR;
 139         break;
 140     case ZLIB_FILEFUNC_SEEK_END :
 141         fseek_origin = SEEK_END;
 142         break;
 143     case ZLIB_FILEFUNC_SEEK_SET :
 144         fseek_origin = SEEK_SET;
 145         break;
 146     default: return -1;
 147     }
 148     ret = 0;
 149     fseek((FILE *)stream, offset, fseek_origin);
 150     return ret;
 151 }
 152
 153 int ZCALLBACK fclose_file_func (opaque, stream)
 154    voidpf opaque;
 155    voidpf stream;
 156 {
 157     (void) opaque; /* avoid "unused parameter" warning */
 158     int ret;
 159     ret = fclose((FILE *)stream);
 160     return ret;
 161 }
 162
 163 int ZCALLBACK ferror_file_func (opaque, stream)
 164    voidpf opaque;
 165    voidpf stream;
 166 {
 167     (void) opaque; /* avoid "unused parameter" warning */
 168     int ret;
 169     ret = ferror((FILE *)stream);
 170     return ret;
 171 }
 172
 173 void fill_fopen_filefunc (pzlib_filefunc_def)
 174   zlib_filefunc_def* pzlib_filefunc_def;
 175 {
 176     pzlib_filefunc_def->zopen_file = fopen_file_func;
 177     pzlib_filefunc_def->zread_file = fread_file_func;
 178     pzlib_filefunc_def->zwrite_file = fwrite_file_func;
 179     pzlib_filefunc_def->ztell_file = ftell_file_func;
 180     pzlib_filefunc_def->zseek_file = fseek_file_func;
 181     pzlib_filefunc_def->zclose_file = fclose_file_func;
 182     pzlib_filefunc_def->zerror_file = ferror_file_func;
 183     pzlib_filefunc_def->opaque = NULL;
 184 }