source: trunk/third/zlib/contrib/minizip/unzip.h @ 15211

Revision 15211, 9.7 KB checked in by ghudson, 24 years ago (diff)
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[15210]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
45extern "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 */
55typedef struct TagunzFile__ { int unused; } unzFile__;
56typedef unzFile__ *unzFile;
57#else
58typedef 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 */
72typedef 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 */
84typedef 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 */
93typedef 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
114extern 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
127extern 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
138extern 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
145extern 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
153extern 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
166extern 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
172extern 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
179extern 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
192extern 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
218extern 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
224extern 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                                                                                               
231extern 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
245extern z_off_t ZEXPORT unztell OF((unzFile file));
246/*
247  Give the current position in uncompressed data
248*/
249
250extern int ZEXPORT unzeof OF((unzFile file));
251/*
252  return 1 if the end of file was reached, 0 elsewhere
253*/
254
255extern 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 */
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