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author Robert McIntyre <rlm@mit.edu>
date Sat, 03 Mar 2012 10:31:27 -0600
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0:8ced16adf2e1 1:f9f4f1b99eed
1 /* unzip.h -- IO for uncompress .zip files using zlib
2 Version 0.15 beta, Mar 19th, 1998,
3
4 Copyright (C) 1998 Gilles Vollant
5
6 This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
7 WinZip, InfoZip tools and compatible.
8 Encryption and multi volume ZipFile (span) are not supported.
9 Old compressions used by old PKZip 1.x are not supported
10
11 THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
12 CAN CHANGE IN FUTURE VERSION !!
13 I WAIT FEEDBACK at mail info@winimage.com
14 Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
15
16 Condition of use and distribution are the same than zlib :
17
18 This software is provided 'as-is', without any express or implied
19 warranty. In no event will the authors be held liable for any damages
20 arising from the use of this software.
21
22 Permission is granted to anyone to use this software for any purpose,
23 including commercial applications, and to alter it and redistribute it
24 freely, subject to the following restrictions:
25
26 1. The origin of this software must not be misrepresented; you must not
27 claim that you wrote the original software. If you use this software
28 in a product, an acknowledgment in the product documentation would be
29 appreciated but is not required.
30 2. Altered source versions must be plainly marked as such, and must not be
31 misrepresented as being the original software.
32 3. This notice may not be removed or altered from any source distribution.
33
34
35 */
36 /* for more info about .ZIP format, see
37 ftp://ftp.cdrom.com/pub/infozip/doc/appnote-970311-iz.zip
38 PkWare has also a specification at :
39 ftp://ftp.pkware.com/probdesc.zip */
40
41 #ifndef _unz_H
42 #define _unz_H
43
44 #ifdef __cplusplus
45 extern "C" {
46 #endif
47
48 #ifndef _ZLIB_H
49 #include "zlib.h"
50 #endif
51
52 #if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
53 /* like the STRICT of WIN32, we define a pointer that cannot be converted
54 from (void*) without cast */
55 typedef struct TagunzFile__ { int unused; } unzFile__;
56 typedef unzFile__ *unzFile;
57 #else
58 typedef voidp unzFile;
59 #endif
60
61
62 #define UNZ_OK (0)
63 #define UNZ_END_OF_LIST_OF_FILE (-100)
64 #define UNZ_ERRNO (Z_ERRNO)
65 #define UNZ_EOF (0)
66 #define UNZ_PARAMERROR (-102)
67 #define UNZ_BADZIPFILE (-103)
68 #define UNZ_INTERNALERROR (-104)
69 #define UNZ_CRCERROR (-105)
70
71 /* tm_unz contain date/time info */
72 typedef struct tm_unz_s
73 {
74 uInt tm_sec; /* seconds after the minute - [0,59] */
75 uInt tm_min; /* minutes after the hour - [0,59] */
76 uInt tm_hour; /* hours since midnight - [0,23] */
77 uInt tm_mday; /* day of the month - [1,31] */
78 uInt tm_mon; /* months since January - [0,11] */
79 uInt tm_year; /* years - [1980..2044] */
80 } tm_unz;
81
82 /* unz_global_info structure contain global data about the ZIPfile
83 These data comes from the end of central dir */
84 typedef struct unz_global_info_s
85 {
86 uLong number_entry; /* total number of entries in
87 the central dir on this disk */
88 uLong size_comment; /* size of the global comment of the zipfile */
89 } unz_global_info;
90
91
92 /* unz_file_info contain information about a file in the zipfile */
93 typedef struct unz_file_info_s
94 {
95 uLong version; /* version made by 2 bytes */
96 uLong version_needed; /* version needed to extract 2 bytes */
97 uLong flag; /* general purpose bit flag 2 bytes */
98 uLong compression_method; /* compression method 2 bytes */
99 uLong dosDate; /* last mod file date in Dos fmt 4 bytes */
100 uLong crc; /* crc-32 4 bytes */
101 uLong compressed_size; /* compressed size 4 bytes */
102 uLong uncompressed_size; /* uncompressed size 4 bytes */
103 uLong size_filename; /* filename length 2 bytes */
104 uLong size_file_extra; /* extra field length 2 bytes */
105 uLong size_file_comment; /* file comment length 2 bytes */
106
107 uLong disk_num_start; /* disk number start 2 bytes */
108 uLong internal_fa; /* internal file attributes 2 bytes */
109 uLong external_fa; /* external file attributes 4 bytes */
110
111 tm_unz tmu_date;
112 } unz_file_info;
113
114 extern int ZEXPORT unzStringFileNameCompare OF ((const char* fileName1,
115 const char* fileName2,
116 int iCaseSensitivity));
117 /*
118 Compare two filename (fileName1,fileName2).
119 If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
120 If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
121 or strcasecmp)
122 If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
123 (like 1 on Unix, 2 on Windows)
124 */
125
126
127 extern unzFile ZEXPORT unzOpen OF((const char *path));
128 /*
129 Open a Zip file. path contain the full pathname (by example,
130 on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
131 "zlib/zlib111.zip".
132 If the zipfile cannot be opened (file don't exist or in not valid), the
133 return value is NULL.
134 Else, the return value is a unzFile Handle, usable with other function
135 of this unzip package.
136 */
137
138 extern int ZEXPORT unzClose OF((unzFile file));
139 /*
140 Close a ZipFile opened with unzipOpen.
141 If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
142 these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
143 return UNZ_OK if there is no problem. */
144
145 extern int ZEXPORT unzGetGlobalInfo OF((unzFile file,
146 unz_global_info *pglobal_info));
147 /*
148 Write info about the ZipFile in the *pglobal_info structure.
149 No preparation of the structure is needed
150 return UNZ_OK if there is no problem. */
151
152
153 extern int ZEXPORT unzGetGlobalComment OF((unzFile file,
154 char *szComment,
155 uLong uSizeBuf));
156 /*
157 Get the global comment string of the ZipFile, in the szComment buffer.
158 uSizeBuf is the size of the szComment buffer.
159 return the number of byte copied or an error code <0
160 */
161
162
163 /***************************************************************************/
164 /* Unzip package allow you browse the directory of the zipfile */
165
166 extern int ZEXPORT unzGoToFirstFile OF((unzFile file));
167 /*
168 Set the current file of the zipfile to the first file.
169 return UNZ_OK if there is no problem
170 */
171
172 extern int ZEXPORT unzGoToNextFile OF((unzFile file));
173 /*
174 Set the current file of the zipfile to the next file.
175 return UNZ_OK if there is no problem
176 return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
177 */
178
179 extern int ZEXPORT unzLocateFile OF((unzFile file,
180 const char *szFileName,
181 int iCaseSensitivity));
182 /*
183 Try locate the file szFileName in the zipfile.
184 For the iCaseSensitivity signification, see unzStringFileNameCompare
185
186 return value :
187 UNZ_OK if the file is found. It becomes the current file.
188 UNZ_END_OF_LIST_OF_FILE if the file is not found
189 */
190
191
192 extern int ZEXPORT unzGetCurrentFileInfo OF((unzFile file,
193 unz_file_info *pfile_info,
194 char *szFileName,
195 uLong fileNameBufferSize,
196 void *extraField,
197 uLong extraFieldBufferSize,
198 char *szComment,
199 uLong commentBufferSize));
200 /*
201 Get Info about the current file
202 if pfile_info!=NULL, the *pfile_info structure will contain somes info about
203 the current file
204 if szFileName!=NULL, the filemane string will be copied in szFileName
205 (fileNameBufferSize is the size of the buffer)
206 if extraField!=NULL, the extra field information will be copied in extraField
207 (extraFieldBufferSize is the size of the buffer).
208 This is the Central-header version of the extra field
209 if szComment!=NULL, the comment string of the file will be copied in szComment
210 (commentBufferSize is the size of the buffer)
211 */
212
213 /***************************************************************************/
214 /* for reading the content of the current zipfile, you can open it, read data
215 from it, and close it (you can close it before reading all the file)
216 */
217
218 extern int ZEXPORT unzOpenCurrentFile OF((unzFile file));
219 /*
220 Open for reading data the current file in the zipfile.
221 If there is no error, the return value is UNZ_OK.
222 */
223
224 extern int ZEXPORT unzCloseCurrentFile OF((unzFile file));
225 /*
226 Close the file in zip opened with unzOpenCurrentFile
227 Return UNZ_CRCERROR if all the file was read but the CRC is not good
228 */
229
230
231 extern int ZEXPORT unzReadCurrentFile OF((unzFile file,
232 voidp buf,
233 unsigned len));
234 /*
235 Read bytes from the current file (opened by unzOpenCurrentFile)
236 buf contain buffer where data must be copied
237 len the size of buf.
238
239 return the number of byte copied if somes bytes are copied
240 return 0 if the end of file was reached
241 return <0 with error code if there is an error
242 (UNZ_ERRNO for IO error, or zLib error for uncompress error)
243 */
244
245 extern z_off_t ZEXPORT unztell OF((unzFile file));
246 /*
247 Give the current position in uncompressed data
248 */
249
250 extern int ZEXPORT unzeof OF((unzFile file));
251 /*
252 return 1 if the end of file was reached, 0 elsewhere
253 */
254
255 extern int ZEXPORT unzGetLocalExtrafield OF((unzFile file,
256 voidp buf,
257 unsigned len));
258 /*
259 Read extra field from the current file (opened by unzOpenCurrentFile)
260 This is the local-header version of the extra field (sometimes, there is
261 more info in the local-header version than in the central-header)
262
263 if buf==NULL, it return the size of the local extra field
264
265 if buf!=NULL, len is the size of the buffer, the extra header is copied in
266 buf.
267 the return value is the number of bytes copied in buf, or (if <0)
268 the error code
269 */
270
271 #ifdef __cplusplus
272 }
273 #endif
274
275 #endif /* _unz_H */