1 /* unzip.h -- IO for uncompress .zip files using zlib
2 Version 0.15 beta, Mar 19th, 1998,
4 Copyright (C) 1998 Gilles Vollant
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
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
16 Condition of use and distribution are the same than zlib :
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.
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:
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.
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 */
54 #if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
55 /* like the STRICT of WIN32, we define a pointer that cannot be converted
56 from (void*) without cast */
57 typedef struct TagunzFile__ { int unused; } unzFile__;
58 typedef unzFile__ *unzFile;
60 typedef voidp unzFile;
65 #define UNZ_END_OF_LIST_OF_FILE (-100)
66 #define UNZ_ERRNO (Z_ERRNO)
68 #define UNZ_PARAMERROR (-102)
69 #define UNZ_BADZIPFILE (-103)
70 #define UNZ_INTERNALERROR (-104)
71 #define UNZ_CRCERROR (-105)
73 /* tm_unz contain date/time info */
74 typedef struct tm_unz_s
76 uInt tm_sec; /* seconds after the minute - [0,59] */
77 uInt tm_min; /* minutes after the hour - [0,59] */
78 uInt tm_hour; /* hours since midnight - [0,23] */
79 uInt tm_mday; /* day of the month - [1,31] */
80 uInt tm_mon; /* months since January - [0,11] */
81 uInt tm_year; /* years - [1980..2044] */
85 int cacao_locate(unzFile file,utf* filename); /*JOWENN*/
87 /* unz_global_info structure contain global data about the ZIPfile
88 These data comes from the end of central dir */
89 typedef struct unz_global_info_s
91 uLong number_entry; /* total number of entries in
92 the central dir on this disk */
93 uLong size_comment; /* size of the global comment of the zipfile */
97 /* unz_file_info contain information about a file in the zipfile */
98 typedef struct unz_file_info_s
100 uLong version; /* version made by 2 bytes */
101 uLong version_needed; /* version needed to extract 2 bytes */
102 uLong flag; /* general purpose bit flag 2 bytes */
103 uLong compression_method; /* compression method 2 bytes */
104 uLong dosDate; /* last mod file date in Dos fmt 4 bytes */
105 uLong crc; /* crc-32 4 bytes */
106 uLong compressed_size; /* compressed size 4 bytes */
107 uLong uncompressed_size; /* uncompressed size 4 bytes */
108 uLong size_filename; /* filename length 2 bytes */
109 uLong size_file_extra; /* extra field length 2 bytes */
110 uLong size_file_comment; /* file comment length 2 bytes */
112 uLong disk_num_start; /* disk number start 2 bytes */
113 uLong internal_fa; /* internal file attributes 2 bytes */
114 uLong external_fa; /* external file attributes 4 bytes */
119 extern int ZEXPORT unzStringFileNameCompare OF ((const char* fileName1,
120 const char* fileName2,
121 int iCaseSensitivity));
123 Compare two filename (fileName1,fileName2).
124 If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
125 If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
127 If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
128 (like 1 on Unix, 2 on Windows)
132 extern unzFile ZEXPORT unzOpen OF((const char *path));
134 Open a Zip file. path contain the full pathname (by example,
135 on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
137 If the zipfile cannot be opened (file don't exist or in not valid), the
138 return value is NULL.
139 Else, the return value is a unzFile Handle, usable with other function
140 of this unzip package.
143 extern int ZEXPORT unzClose OF((unzFile file));
145 Close a ZipFile opened with unzipOpen.
146 If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
147 these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
148 return UNZ_OK if there is no problem. */
150 extern int ZEXPORT unzGetGlobalInfo OF((unzFile file,
151 unz_global_info *pglobal_info));
153 Write info about the ZipFile in the *pglobal_info structure.
154 No preparation of the structure is needed
155 return UNZ_OK if there is no problem. */
158 extern int ZEXPORT unzGetGlobalComment OF((unzFile file,
162 Get the global comment string of the ZipFile, in the szComment buffer.
163 uSizeBuf is the size of the szComment buffer.
164 return the number of byte copied or an error code <0
168 /***************************************************************************/
169 /* Unzip package allow you browse the directory of the zipfile */
171 extern int ZEXPORT unzGoToFirstFile OF((unzFile file));
173 Set the current file of the zipfile to the first file.
174 return UNZ_OK if there is no problem
177 extern int ZEXPORT unzGoToNextFile OF((unzFile file));
179 Set the current file of the zipfile to the next file.
180 return UNZ_OK if there is no problem
181 return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
184 extern int ZEXPORT unzLocateFile OF((unzFile file,
185 const char *szFileName,
186 int iCaseSensitivity));
188 Try locate the file szFileName in the zipfile.
189 For the iCaseSensitivity signification, see unzStringFileNameCompare
192 UNZ_OK if the file is found. It becomes the current file.
193 UNZ_END_OF_LIST_OF_FILE if the file is not found
197 extern int ZEXPORT unzGetCurrentFileInfo OF((unzFile file,
198 unz_file_info *pfile_info,
200 uLong fileNameBufferSize,
202 uLong extraFieldBufferSize,
204 uLong commentBufferSize));
206 Get Info about the current file
207 if pfile_info!=NULL, the *pfile_info structure will contain somes info about
209 if szFileName!=NULL, the filemane string will be copied in szFileName
210 (fileNameBufferSize is the size of the buffer)
211 if extraField!=NULL, the extra field information will be copied in extraField
212 (extraFieldBufferSize is the size of the buffer).
213 This is the Central-header version of the extra field
214 if szComment!=NULL, the comment string of the file will be copied in szComment
215 (commentBufferSize is the size of the buffer)
218 /***************************************************************************/
219 /* for reading the content of the current zipfile, you can open it, read data
220 from it, and close it (you can close it before reading all the file)
223 extern int ZEXPORT unzOpenCurrentFile OF((unzFile file));
225 Open for reading data the current file in the zipfile.
226 If there is no error, the return value is UNZ_OK.
229 extern int ZEXPORT unzCloseCurrentFile OF((unzFile file));
231 Close the file in zip opened with unzOpenCurrentFile
232 Return UNZ_CRCERROR if all the file was read but the CRC is not good
236 extern int ZEXPORT unzReadCurrentFile OF((unzFile file,
240 Read bytes from the current file (opened by unzOpenCurrentFile)
241 buf contain buffer where data must be copied
244 return the number of byte copied if somes bytes are copied
245 return 0 if the end of file was reached
246 return <0 with error code if there is an error
247 (UNZ_ERRNO for IO error, or zLib error for uncompress error)
250 extern z_off_t ZEXPORT unztell OF((unzFile file));
252 Give the current position in uncompressed data
255 extern int ZEXPORT unzeof OF((unzFile file));
257 return 1 if the end of file was reached, 0 elsewhere
260 extern int ZEXPORT unzGetLocalExtrafield OF((unzFile file,
264 Read extra field from the current file (opened by unzOpenCurrentFile)
265 This is the local-header version of the extra field (sometimes, there is
266 more info in the local-header version than in the central-header)
268 if buf==NULL, it return the size of the local extra field
270 if buf!=NULL, len is the size of the buffer, the extra header is copied in
272 the return value is the number of bytes copied in buf, or (if <0)