1/* ioapi.h -- IO base function header for compress/uncompress .zip
  2   part of the MiniZip project - ( http://www.winimage.com/zLibDll/minizip.html )
  3
  4         Copyright (C) 1998-2010 Gilles Vollant (minizip) ( http://www.winimage.com/zLibDll/minizip.html )
  5
  6         Modifications for Zip64 support
  7         Copyright (C) 2009-2010 Mathias Svensson ( http://result42.com )
  8
  9         For more info read MiniZip_info.txt
 10
 11*/
 12
 13#if defined(_WIN32) && (!(defined(_CRT_SECURE_NO_WARNINGS)))
 14        #define _CRT_SECURE_NO_WARNINGS
 15#endif
 16
 17#if defined(__APPLE__) || defined(IOAPI_NO_64)
 18// In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
 19#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
 20#define FTELLO_FUNC(stream) ftello(stream)
 21#define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
 22#else
 23#define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
 24#define FTELLO_FUNC(stream) ftello64(stream)
 25#define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
 26#endif
 27
 28
 29#include "ioapi.h"
 30
 31voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
 32{
 33    if (pfilefunc->zfile_func64.zopen64_file != NULL)
 34        return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
 35    else
 36    {
 37        return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
 38    }
 39}
 40
 41long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
 42{
 43    if (pfilefunc->zfile_func64.zseek64_file != NULL)
 44        return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
 45    else
 46    {
 47        uLong offsetTruncated = (uLong)offset;
 48        if (offsetTruncated != offset)
 49            return -1;
 50        else
 51            return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
 52    }
 53}
 54
 55ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
 56{
 57    if (pfilefunc->zfile_func64.zseek64_file != NULL)
 58        return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
 59    else
 60    {
 61        uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
 62        if ((tell_uLong) == MAXU32)
 63            return (ZPOS64_T)-1;
 64        else
 65            return tell_uLong;
 66    }
 67}
 68
 69void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
 70{
 71    p_filefunc64_32->zfile_func64.zopen64_file = NULL;
 72    p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
 73    p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
 74    p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
 75    p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
 76    p_filefunc64_32->zfile_func64.ztell64_file = NULL;
 77    p_filefunc64_32->zfile_func64.zseek64_file = NULL;
 78    p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
 79    p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
 80    p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
 81    p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
 82    p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
 83}
 84
 85
 86
 87static voidpf  ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
 88static uLong   ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
 89static uLong   ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
 90static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
 91static long    ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
 92static int     ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
 93static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
 94
 95static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
 96{
 97    FILE* file = NULL;
 98    const char* mode_fopen = NULL;
 99    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
100        mode_fopen = "rb";
101    else
102    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
103        mode_fopen = "r+b";
104    else
105    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
106        mode_fopen = "wb";
107
108    if ((filename!=NULL) && (mode_fopen != NULL))
109        file = fopen(filename, mode_fopen);
110    return file;
111}
112
113static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
114{
115    FILE* file = NULL;
116    const char* mode_fopen = NULL;
117    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
118        mode_fopen = "rb";
119    else
120    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
121        mode_fopen = "r+b";
122    else
123    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
124        mode_fopen = "wb";
125
126    if ((filename!=NULL) && (mode_fopen != NULL))
127        file = FOPEN_FUNC((const char*)filename, mode_fopen);
128    return file;
129}
130
131
132static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
133{
134    uLong ret;
135    ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
136    return ret;
137}
138
139static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
140{
141    uLong ret;
142    ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
143    return ret;
144}
145
146static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
147{
148    long ret;
149    ret = ftell((FILE *)stream);
150    return ret;
151}
152
153
154static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
155{
156    ZPOS64_T ret;
157    ret = FTELLO_FUNC((FILE *)stream);
158    return ret;
159}
160
161static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
162{
163    int fseek_origin=0;
164    long ret;
165    switch (origin)
166    {
167    case ZLIB_FILEFUNC_SEEK_CUR :
168        fseek_origin = SEEK_CUR;
169        break;
170    case ZLIB_FILEFUNC_SEEK_END :
171        fseek_origin = SEEK_END;
172        break;
173    case ZLIB_FILEFUNC_SEEK_SET :
174        fseek_origin = SEEK_SET;
175        break;
176    default: return -1;
177    }
178    ret = 0;
179    if (fseek((FILE *)stream, offset, fseek_origin) != 0)
180        ret = -1;
181    return ret;
182}
183
184static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
185{
186    int fseek_origin=0;
187    long ret;
188    switch (origin)
189    {
190    case ZLIB_FILEFUNC_SEEK_CUR :
191        fseek_origin = SEEK_CUR;
192        break;
193    case ZLIB_FILEFUNC_SEEK_END :
194        fseek_origin = SEEK_END;
195        break;
196    case ZLIB_FILEFUNC_SEEK_SET :
197        fseek_origin = SEEK_SET;
198        break;
199    default: return -1;
200    }
201    ret = 0;
202
203    if(FSEEKO_FUNC((FILE *)stream, offset, fseek_origin) != 0)
204                        ret = -1;
205
206    return ret;
207}
208
209
210static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
211{
212    int ret;
213    ret = fclose((FILE *)stream);
214    return ret;
215}
216
217static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
218{
219    int ret;
220    ret = ferror((FILE *)stream);
221    return ret;
222}
223
224void fill_fopen_filefunc (pzlib_filefunc_def)
225  zlib_filefunc_def* pzlib_filefunc_def;
226{
227    pzlib_filefunc_def->zopen_file = fopen_file_func;
228    pzlib_filefunc_def->zread_file = fread_file_func;
229    pzlib_filefunc_def->zwrite_file = fwrite_file_func;
230    pzlib_filefunc_def->ztell_file = ftell_file_func;
231    pzlib_filefunc_def->zseek_file = fseek_file_func;
232    pzlib_filefunc_def->zclose_file = fclose_file_func;
233    pzlib_filefunc_def->zerror_file = ferror_file_func;
234    pzlib_filefunc_def->opaque = NULL;
235}
236
237void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
238{
239    pzlib_filefunc_def->zopen64_file = fopen64_file_func;
240    pzlib_filefunc_def->zread_file = fread_file_func;
241    pzlib_filefunc_def->zwrite_file = fwrite_file_func;
242    pzlib_filefunc_def->ztell64_file = ftell64_file_func;
243    pzlib_filefunc_def->zseek64_file = fseek64_file_func;
244    pzlib_filefunc_def->zclose_file = fclose_file_func;
245    pzlib_filefunc_def->zerror_file = ferror_file_func;
246    pzlib_filefunc_def->opaque = NULL;
247}