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 */
276