common/dist/zlib/contrib/minizip/ioapi.c

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