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))
14        #define _CRT_SECURE_NO_WARNINGS
15#endif
16
17#include "ioapi.h"
18
19voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
20{
21    if (pfilefunc->zfile_func64.zopen64_file != NULL)
22        return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
23    else
24    {
25        return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
26    }
27}
28
29long call_zseek64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream, ZPOS64_T offset, int origin)
30{
31    if (pfilefunc->zfile_func64.zseek64_file != NULL)
32        return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque,filestream,offset,origin);
33    else
34    {
35        uLong offsetTruncated = (uLong)offset;
36        if (offsetTruncated != offset)
37            return -1;
38        else
39            return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque,filestream,offsetTruncated,origin);
40    }
41}
42
43ZPOS64_T call_ztell64 (const zlib_filefunc64_32_def* pfilefunc,voidpf filestream)
44{
45    if (pfilefunc->zfile_func64.zseek64_file != NULL)
46        return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque,filestream);
47    else
48    {
49        uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque,filestream);
50        if ((tell_uLong) == ((uLong)-1))
51            return (ZPOS64_T)-1;
52        else
53            return tell_uLong;
54    }
55}
56
57void fill_zlib_filefunc64_32_def_from_filefunc32(zlib_filefunc64_32_def* p_filefunc64_32,const zlib_filefunc_def* p_filefunc32)
58{
59    p_filefunc64_32->zfile_func64.zopen64_file = NULL;
60    p_filefunc64_32->zopen32_file = p_filefunc32->zopen_file;
61    p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
62    p_filefunc64_32->zfile_func64.zread_file = p_filefunc32->zread_file;
63    p_filefunc64_32->zfile_func64.zwrite_file = p_filefunc32->zwrite_file;
64    p_filefunc64_32->zfile_func64.ztell64_file = NULL;
65    p_filefunc64_32->zfile_func64.zseek64_file = NULL;
66    p_filefunc64_32->zfile_func64.zclose_file = p_filefunc32->zclose_file;
67    p_filefunc64_32->zfile_func64.zerror_file = p_filefunc32->zerror_file;
68    p_filefunc64_32->zfile_func64.opaque = p_filefunc32->opaque;
69    p_filefunc64_32->zseek32_file = p_filefunc32->zseek_file;
70    p_filefunc64_32->ztell32_file = p_filefunc32->ztell_file;
71}
72
73
74
75static voidpf  ZCALLBACK fopen_file_func OF((voidpf opaque, const char* filename, int mode));
76static uLong   ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
77static uLong   ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
78static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
79static long    ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
80static int     ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
81static int     ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
82
83static voidpf ZCALLBACK fopen_file_func (voidpf opaque, const char* filename, int mode)
84{
85    FILE* file = NULL;
86    const char* mode_fopen = NULL;
87    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
88        mode_fopen = "rb";
89    else
90    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
91        mode_fopen = "r+b";
92    else
93    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
94        mode_fopen = "wb";
95
96    if ((filename!=NULL) && (mode_fopen != NULL))
97        file = fopen(filename, mode_fopen);
98    return file;
99}
100
101static voidpf ZCALLBACK fopen64_file_func (voidpf opaque, const void* filename, int mode)
102{
103    FILE* file = NULL;
104    const char* mode_fopen = NULL;
105    if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER)==ZLIB_FILEFUNC_MODE_READ)
106        mode_fopen = "rb";
107    else
108    if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
109        mode_fopen = "r+b";
110    else
111    if (mode & ZLIB_FILEFUNC_MODE_CREATE)
112        mode_fopen = "wb";
113
114    if ((filename!=NULL) && (mode_fopen != NULL))
115        file = fopen64((const char*)filename, mode_fopen);
116    return file;
117}
118
119
120static uLong ZCALLBACK fread_file_func (voidpf opaque, voidpf stream, void* buf, uLong size)
121{
122    uLong ret;
123    ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
124    return ret;
125}
126
127static uLong ZCALLBACK fwrite_file_func (voidpf opaque, voidpf stream, const void* buf, uLong size)
128{
129    uLong ret;
130    ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
131    return ret;
132}
133
134static long ZCALLBACK ftell_file_func (voidpf opaque, voidpf stream)
135{
136    long ret;
137    ret = ftell((FILE *)stream);
138    return ret;
139}
140
141
142static ZPOS64_T ZCALLBACK ftell64_file_func (voidpf opaque, voidpf stream)
143{
144    ZPOS64_T ret;
145    ret = ftello64((FILE *)stream);
146    return ret;
147}
148
149static long ZCALLBACK fseek_file_func (voidpf  opaque, voidpf stream, uLong offset, int origin)
150{
151    int fseek_origin=0;
152    long ret;
153    switch (origin)
154    {
155    case ZLIB_FILEFUNC_SEEK_CUR :
156        fseek_origin = SEEK_CUR;
157        break;
158    case ZLIB_FILEFUNC_SEEK_END :
159        fseek_origin = SEEK_END;
160        break;
161    case ZLIB_FILEFUNC_SEEK_SET :
162        fseek_origin = SEEK_SET;
163        break;
164    default: return -1;
165    }
166    ret = 0;
167    if (fseek((FILE *)stream, offset, fseek_origin) != 0)
168        ret = -1;
169    return ret;
170}
171
172static long ZCALLBACK fseek64_file_func (voidpf  opaque, voidpf stream, ZPOS64_T offset, int origin)
173{
174    int fseek_origin=0;
175    long ret;
176    switch (origin)
177    {
178    case ZLIB_FILEFUNC_SEEK_CUR :
179        fseek_origin = SEEK_CUR;
180        break;
181    case ZLIB_FILEFUNC_SEEK_END :
182        fseek_origin = SEEK_END;
183        break;
184    case ZLIB_FILEFUNC_SEEK_SET :
185        fseek_origin = SEEK_SET;
186        break;
187    default: return -1;
188    }
189    ret = 0;
190
191    if(fseeko64((FILE *)stream, offset, fseek_origin) != 0)
192                        ret = -1;
193
194    return ret;
195}
196
197
198static int ZCALLBACK fclose_file_func (voidpf opaque, voidpf stream)
199{
200    int ret;
201    ret = fclose((FILE *)stream);
202    return ret;
203}
204
205static int ZCALLBACK ferror_file_func (voidpf opaque, voidpf stream)
206{
207    int ret;
208    ret = ferror((FILE *)stream);
209    return ret;
210}
211
212void fill_fopen_filefunc (pzlib_filefunc_def)
213  zlib_filefunc_def* pzlib_filefunc_def;
214{
215    pzlib_filefunc_def->zopen_file = fopen_file_func;
216    pzlib_filefunc_def->zread_file = fread_file_func;
217    pzlib_filefunc_def->zwrite_file = fwrite_file_func;
218    pzlib_filefunc_def->ztell_file = ftell_file_func;
219    pzlib_filefunc_def->zseek_file = fseek_file_func;
220    pzlib_filefunc_def->zclose_file = fclose_file_func;
221    pzlib_filefunc_def->zerror_file = ferror_file_func;
222    pzlib_filefunc_def->opaque = NULL;
223}
224
225void fill_fopen64_filefunc (zlib_filefunc64_def*  pzlib_filefunc_def)
226{
227    pzlib_filefunc_def->zopen64_file = fopen64_file_func;
228    pzlib_filefunc_def->zread_file = fread_file_func;
229    pzlib_filefunc_def->zwrite_file = fwrite_file_func;
230    pzlib_filefunc_def->ztell64_file = ftell64_file_func;
231    pzlib_filefunc_def->zseek64_file = fseek64_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