src/common/unzip.h

   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 */