Mercurial > vba-linux

     1 /* unzip.c -- IO on .zip files using zlib

     2    Version 0.15 beta, Mar 19th, 1998,

     3 

     4    Read unzip.h for more info

     5  */

     6 

     7 #include <cstdio>

     8 #include <cstdlib>

     9 #include <cstring>

    10 #include "zlib.h"

    11 #include "unzip.h"

    12 

    13 #ifdef NO_ERRNO_H

    14 extern int errno;

    15 #else

    16 #   include <cerrno>

    17 #endif

    18 

    19 #ifndef local

    20 #  define local static

    21 #endif

    22 /* compile with -Dlocal if your debugger can't find static symbols */

    23 

    24 #if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \

    25     !defined(CASESENSITIVITYDEFAULT_NO)

    26 #define CASESENSITIVITYDEFAULT_NO

    27 #endif

    28 

    29 #ifndef UNZ_BUFSIZE

    30 #define UNZ_BUFSIZE (16384)

    31 #endif

    32 

    33 #ifndef UNZ_MAXFILENAMEINZIP

    34 #define UNZ_MAXFILENAMEINZIP (256)

    35 #endif

    36 

    37 #ifndef ALLOC

    38 # define ALLOC(size) (malloc(size))

    39 #endif

    40 #ifndef TRYFREE

    41 # define TRYFREE(p) {if (p) \

    42 						 free(p);}

    43 #endif

    44 

    45 #define SIZECENTRALDIRITEM (0x2e)

    46 #define SIZEZIPLOCALHEADER (0x1e)

    47 

    48 /* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */

    49 

    50 #ifndef SEEK_CUR

    51 #define SEEK_CUR    1

    52 #endif

    53 

    54 #ifndef SEEK_END

    55 #define SEEK_END    2

    56 #endif

    57 

    58 #ifndef SEEK_SET

    59 #define SEEK_SET    0

    60 #endif

    61 

    62 const char unz_copyright[] =

    63     " unzip 0.15 Copyright 1998 Gilles Vollant ";

    64 

    65 /* unz_file_info_interntal contain internal info about a file in zipfile*/

    66 typedef struct unz_file_info_internal_s

    67 {

    68 	uLong offset_curfile; /* relative offset of local header 4 bytes */

    69 } unz_file_info_internal;

    70 

    71 /* file_in_zip_read_info_s contain internal information about a file in zipfile,

    72     when reading and decompress it */

    73 typedef struct

    74 {

    75 	char *   read_buffer;           /* internal buffer for compressed data */

    76 	z_stream stream;                /* zLib stream structure for inflate */

    77 

    78 	uLong pos_in_zipfile;           /* position in byte on the zipfile, for fseek*/

    79 	uLong stream_initialised;       /* flag set if stream structure is initialised*/

    80 

    81 	uLong offset_local_extrafield;    /* offset of the local extra field */

    82 	uInt  size_local_extrafield;    /* size of the local extra field */

    83 	uLong pos_local_extrafield;       /* position in the local extra field in read*/

    84 

    85 	uLong crc32;                    /* crc32 of all data uncompressed */

    86 	uLong crc32_wait;               /* crc32 we must obtain after decompress all */

    87 	uLong rest_read_compressed;     /* number of byte to be decompressed */

    88 	uLong rest_read_uncompressed;    /*number of byte to be obtained after decomp*/

    89 	FILE* file;                     /* io structore of the zipfile */

    90 	uLong compression_method;       /* compression method (0==store) */

    91 	uLong byte_before_the_zipfile;    /* byte before the zipfile, (>0 for sfx)*/

    92 } file_in_zip_read_info_s;

    93 

    94 /* unz_s contain internal information about the zipfile

    95  */

    96 typedef struct

    97 {

    98 	FILE*file;                      /* io structore of the zipfile */

    99 	unz_global_info gi;           /* public global information */

   100 	uLong byte_before_the_zipfile;    /* byte before the zipfile, (>0 for sfx)*/

   101 	uLong num_file;                 /* number of the current file in the zipfile*/

   102 	uLong pos_in_central_dir;       /* pos of the current file in the central dir*/

   103 	uLong current_file_ok;          /* flag about the usability of the current file*/

   104 	uLong central_pos;              /* position of the beginning of the central dir*/

   105 

   106 	uLong size_central_dir;         /* size of the central directory  */

   107 	uLong offset_central_dir;       /* offset of start of central directory with

   108 									                               respect to the starting disk number */

   109 

   110 	unz_file_info cur_file_info;     /* public info about the current file in zip*/

   111 	unz_file_info_internal  cur_file_info_internal;    /* private info about it*/

   112 	file_in_zip_read_info_s*pfile_in_zip_read;  /* structure about the current

   113 												   file if we are decompressing it */

   114 } unz_s;

   115 

   116 /* ===========================================================================

   117      Read a byte from a gz_stream; update next_in and avail_in. Return EOF

   118    for end of file.

   119    IN assertion: the stream s has been sucessfully opened for reading.

   120  */

   121 

   122 local int unzlocal_getByte(FILE *fin, int *pi)

   123 {

   124 	unsigned char c;

   125 	int err = fread(&c, 1, 1, fin);

   126 	if (err == 1)

   127 	{

   128 		*pi = (int)c;

   129 		return UNZ_OK;

   130 	}

   131 	else

   132 	{

   133 		if (ferror(fin))

   134 			return UNZ_ERRNO;

   135 		else

   136 			return UNZ_EOF;

   137 	}

   138 }

   139 

   140 /* ===========================================================================

   141    Reads a long in LSB order from the given gz_stream. Sets

   142  */

   143 local int unzlocal_getShort(FILE *fin, uLong *pX)

   144 {

   145 	uLong x ;

   146 	int   i;

   147 	int   err;

   148 

   149 	err = unzlocal_getByte(fin, &i);

   150 	x   = (uLong)i;

   151 

   152 	if (err == UNZ_OK)

   153 		err = unzlocal_getByte(fin, &i);

   154 	x += ((uLong)i)<<8;

   155 

   156 	if (err == UNZ_OK)

   157 		*pX = x;

   158 	else

   159 		*pX = 0;

   160 	return err;

   161 }

   162 

   163 local int unzlocal_getLong(FILE *fin, uLong *pX)

   164 {

   165 	uLong x ;

   166 	int   i;

   167 	int   err;

   168 

   169 	err = unzlocal_getByte(fin, &i);

   170 	x   = (uLong)i;

   171 

   172 	if (err == UNZ_OK)

   173 		err = unzlocal_getByte(fin, &i);

   174 	x += ((uLong)i)<<8;

   175 

   176 	if (err == UNZ_OK)

   177 		err = unzlocal_getByte(fin, &i);

   178 	x += ((uLong)i)<<16;

   179 

   180 	if (err == UNZ_OK)

   181 		err = unzlocal_getByte(fin, &i);

   182 	x += ((uLong)i)<<24;

   183 

   184 	if (err == UNZ_OK)

   185 		*pX = x;

   186 	else

   187 		*pX = 0;

   188 	return err;

   189 }

   190 

   191 /* My own strcmpi / strcasecmp */

   192 local int strcmpcasenosensitive_internal(const char *fileName1,

   193                                          const char *fileName2)

   194 {

   195 	for (;;)

   196 	{

   197 		char c1 = *(fileName1++);

   198 		char c2 = *(fileName2++);

   199 		if ((c1 >= 'a') && (c1 <= 'z'))

   200 			c1 -= 0x20;

   201 		if ((c2 >= 'a') && (c2 <= 'z'))

   202 			c2 -= 0x20;

   203 		if (c1 == '\0')

   204 			return ((c2 == '\0') ? 0 : -1);

   205 		if (c2 == '\0')

   206 			return 1;

   207 		if (c1 < c2)

   208 			return -1;

   209 		if (c1 > c2)

   210 			return 1;

   211 	}

   212 }

   213 

   214 #ifdef  CASESENSITIVITYDEFAULT_NO

   215 #define CASESENSITIVITYDEFAULTVALUE 2

   216 #else

   217 #define CASESENSITIVITYDEFAULTVALUE 1

   218 #endif

   219 

   220 #ifndef STRCMPCASENOSENTIVEFUNCTION

   221 #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal

   222 #endif

   223 

   224 /*

   225    Compare two filename (fileName1,fileName2).

   226    If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)

   227    If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi

   228                                                                 or strcasecmp)

   229    If iCaseSenisivity = 0, case sensitivity is defaut of your operating system

   230         (like 1 on Unix, 2 on Windows)

   231 

   232  */

   233 extern int ZEXPORT unzStringFileNameCompare(const char *fileName1,

   234                                             const char *fileName2,

   235                                             int iCaseSensitivity)

   236 {

   237 	if (iCaseSensitivity == 0)

   238 		iCaseSensitivity = CASESENSITIVITYDEFAULTVALUE;

   239 

   240 	if (iCaseSensitivity == 1)

   241 		return strcmp(fileName1, fileName2);

   242 

   243 	return STRCMPCASENOSENTIVEFUNCTION(fileName1, fileName2);

   244 }

   245 

   246 #define BUFREADCOMMENT (0x400)

   247 

   248 /*

   249    Locate the Central directory of a zipfile (at the end, just before

   250     the global comment)

   251  */

   252 local uLong unzlocal_SearchCentralDir(FILE *fin)

   253 {

   254 	unsigned char*buf;

   255 	uLong         uSizeFile;

   256 	uLong         uBackRead;

   257 	uLong         uMaxBack  = 0xffff; /* maximum size of global comment */

   258 	uLong         uPosFound = 0;

   259 

   260 	if (fseek(fin, 0, SEEK_END) != 0)

   261 		return 0;

   262 

   263 	uSizeFile = ftell(fin);

   264 

   265 	if (uMaxBack > uSizeFile)

   266 		uMaxBack = uSizeFile;

   267 

   268 	buf = (unsigned char *)ALLOC(BUFREADCOMMENT+4);

   269 	if (buf == NULL)

   270 		return 0;

   271 

   272 	uBackRead = 4;

   273 	while (uBackRead < uMaxBack)

   274 	{

   275 		uLong uReadSize, uReadPos ;

   276 		int   i;

   277 		if (uBackRead+BUFREADCOMMENT > uMaxBack)

   278 			uBackRead = uMaxBack;

   279 		else

   280 			uBackRead += BUFREADCOMMENT;

   281 		uReadPos = uSizeFile-uBackRead ;

   282 

   283 		uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?

   284 		            (BUFREADCOMMENT+4) : (uSizeFile-uReadPos);

   285 		if (fseek(fin, uReadPos, SEEK_SET) != 0)

   286 			break;

   287 

   288 		if (fread(buf, (uInt)uReadSize, 1, fin) != 1)

   289 			break;

   290 

   291 		for (i = (int)uReadSize-3; (i--) > 0;)

   292 			if (((*(buf+i)) == 0x50) && ((*(buf+i+1)) == 0x4b) &&

   293 			    ((*(buf+i+2)) == 0x05) && ((*(buf+i+3)) == 0x06))

   294 			{

   295 				uPosFound = uReadPos+i;

   296 				break;

   297 			}

   298 

   299 		if (uPosFound != 0)

   300 			break;

   301 	}

   302 	TRYFREE(buf);

   303 	return uPosFound;

   304 }

   305 

   306 /*

   307    Open a Zip file. path contain the full pathname (by example,

   308      on a Windows NT computer "c:\\test\\zlib109.zip" or on an Unix computer

   309          "zlib/zlib109.zip".

   310          If the zipfile cannot be opened (file don't exist or in not valid), the

   311            return value is NULL.

   312      Else, the return value is a unzFile Handle, usable with other function

   313            of this unzip package.

   314  */

   315 extern unzFile ZEXPORT unzOpen(const char *path)

   316 {

   317 	unz_s  us;

   318 	unz_s *s;

   319 	uLong  central_pos, uL;

   320 	FILE * fin ;

   321 

   322 	uLong number_disk;              /* number of the current dist, used for

   323 									                               spaning ZIP, unsupported, always 0*/

   324 	uLong number_disk_with_CD;      /* number the the disk with central dir, used

   325 									                               for spaning ZIP, unsupported, always 0*/

   326 	uLong number_entry_CD;          /* total number of entries in

   327 									   the central dir

   328 									   (same than number_entry on nospan) */

   329 

   330 	int err = UNZ_OK;

   331 

   332 	if (unz_copyright[0] != ' ')

   333 		return NULL;

   334 

   335 	fin = fopen(path, "rb");

   336 	if (fin == NULL)

   337 		return NULL;

   338 

   339 	central_pos = unzlocal_SearchCentralDir(fin);

   340 	if (central_pos == 0)

   341 		err = UNZ_ERRNO;

   342 

   343 	if (fseek(fin, central_pos, SEEK_SET) != 0)

   344 		err = UNZ_ERRNO;

   345 

   346 	/* the signature, already checked */

   347 	if (unzlocal_getLong(fin, &uL) != UNZ_OK)

   348 		err = UNZ_ERRNO;

   349 

   350 	/* number of this disk */

   351 	if (unzlocal_getShort(fin, &number_disk) != UNZ_OK)

   352 		err = UNZ_ERRNO;

   353 

   354 	/* number of the disk with the start of the central directory */

   355 	if (unzlocal_getShort(fin, &number_disk_with_CD) != UNZ_OK)

   356 		err = UNZ_ERRNO;

   357 

   358 	/* total number of entries in the central dir on this disk */

   359 	if (unzlocal_getShort(fin, &us.gi.number_entry) != UNZ_OK)

   360 		err = UNZ_ERRNO;

   361 

   362 	/* total number of entries in the central dir */

   363 	if (unzlocal_getShort(fin, &number_entry_CD) != UNZ_OK)

   364 		err = UNZ_ERRNO;

   365 

   366 	if ((number_entry_CD != us.gi.number_entry) ||

   367 	    (number_disk_with_CD != 0) ||

   368 	    (number_disk != 0))

   369 		err = UNZ_BADZIPFILE;

   370 

   371 	/* size of the central directory */

   372 	if (unzlocal_getLong(fin, &us.size_central_dir) != UNZ_OK)

   373 		err = UNZ_ERRNO;

   374 

   375 	/* offset of start of central directory with respect to the

   376 	      starting disk number */

   377 	if (unzlocal_getLong(fin, &us.offset_central_dir) != UNZ_OK)

   378 		err = UNZ_ERRNO;

   379 

   380 	/* zipfile comment length */

   381 	if (unzlocal_getShort(fin, &us.gi.size_comment) != UNZ_OK)

   382 		err = UNZ_ERRNO;

   383 

   384 	if ((central_pos < us.offset_central_dir+us.size_central_dir) &&

   385 	    (err == UNZ_OK))

   386 		err = UNZ_BADZIPFILE;

   387 

   388 	if (err != UNZ_OK)

   389 	{

   390 		fclose(fin);

   391 		return NULL;

   392 	}

   393 

   394 	us.file = fin;

   395 	us.byte_before_the_zipfile = central_pos -

   396 	                             (us.offset_central_dir+us.size_central_dir);

   397 	us.central_pos       = central_pos;

   398 	us.pfile_in_zip_read = NULL;

   399 

   400 	s  = (unz_s *)ALLOC(sizeof(unz_s));

   401 	*s = us;

   402 	unzGoToFirstFile((unzFile)s);

   403 	return (unzFile)s;

   404 }

   405 

   406 /*

   407    Close a ZipFile opened with unzipOpen.

   408    If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),

   409     these files MUST be closed with unzipCloseCurrentFile before call unzipClose.

   410    return UNZ_OK if there is no problem. */

   411 extern int ZEXPORT unzClose(unzFile file)

   412 {

   413 	unz_s*s;

   414 	if (file == NULL)

   415 		return UNZ_PARAMERROR;

   416 	s = (unz_s *)file;

   417 

   418 	if (s->pfile_in_zip_read != NULL)

   419 		unzCloseCurrentFile(file);

   420 

   421 	fclose(s->file);

   422 	TRYFREE(s);

   423 	return UNZ_OK;

   424 }

   425 

   426 /*

   427    Write info about the ZipFile in the *pglobal_info structure.

   428    No preparation of the structure is needed

   429    return UNZ_OK if there is no problem. */

   430 extern int ZEXPORT unzGetGlobalInfo(unzFile file,

   431                                     unz_global_info *pglobal_info)

   432 {

   433 	unz_s*s;

   434 	if (file == NULL)

   435 		return UNZ_PARAMERROR;

   436 	s = (unz_s *)file;

   437 	*pglobal_info = s->gi;

   438 	return UNZ_OK;

   439 }

   440 

   441 /*

   442    Translate date/time from Dos format to tm_unz (readable more easilty)

   443  */

   444 local void unzlocal_DosDateToTmuDate(uLong ulDosDate, tm_unz *ptm)

   445 {

   446 	uLong uDate;

   447 	uDate        = (uLong)(ulDosDate>>16);

   448 	ptm->tm_mday = (uInt)(uDate&0x1f) ;

   449 	ptm->tm_mon  =  (uInt)((((uDate)&0x1E0)/0x20)-1) ;

   450 	ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ;

   451 

   452 	ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800);

   453 	ptm->tm_min  =  (uInt) ((ulDosDate&0x7E0)/0x20) ;

   454 	ptm->tm_sec  =  (uInt) (2*(ulDosDate&0x1f)) ;

   455 }

   456 

   457 /*

   458    Get Info about the current file in the zipfile, with internal only info

   459  */

   460 local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file,

   461                                                   unz_file_info *pfile_info,

   462                                                   unz_file_info_internal

   463                                                   *pfile_info_internal,

   464                                                   char *szFileName,

   465                                                   uLong fileNameBufferSize,

   466                                                   void *extraField,

   467                                                   uLong extraFieldBufferSize,

   468                                                   char *szComment,

   469                                                   uLong commentBufferSize));

   470 

   471 local int unzlocal_GetCurrentFileInfoInternal(unzFile file,

   472                                               unz_file_info *pfile_info,

   473                                               unz_file_info_internal *pfile_info_internal,

   474                                               char *szFileName,

   475                                               uLong fileNameBufferSize,

   476                                               void *extraField,

   477                                               uLong extraFieldBufferSize,

   478                                               char *szComment,

   479                                               uLong commentBufferSize)

   480 {

   481 	unz_s*        s;

   482 	unz_file_info file_info;

   483 	unz_file_info_internal file_info_internal;

   484 	int   err = UNZ_OK;

   485 	uLong uMagic;

   486 	long  lSeek = 0;

   487 

   488 	if (file == NULL)

   489 		return UNZ_PARAMERROR;

   490 	s = (unz_s *)file;

   491 	if (fseek(s->file, s->pos_in_central_dir+s->byte_before_the_zipfile, SEEK_SET) != 0)

   492 		err = UNZ_ERRNO;

   493 

   494 	/* we check the magic */

   495 	if (err == UNZ_OK)

   496 		if (unzlocal_getLong(s->file, &uMagic) != UNZ_OK)

   497 			err = UNZ_ERRNO;

   498 		else if (uMagic != 0x02014b50)

   499 			err = UNZ_BADZIPFILE;

   500 

   501 	if (unzlocal_getShort(s->file, &file_info.version) != UNZ_OK)

   502 		err = UNZ_ERRNO;

   503 

   504 	if (unzlocal_getShort(s->file, &file_info.version_needed) != UNZ_OK)

   505 		err = UNZ_ERRNO;

   506 

   507 	if (unzlocal_getShort(s->file, &file_info.flag) != UNZ_OK)

   508 		err = UNZ_ERRNO;

   509 

   510 	if (unzlocal_getShort(s->file, &file_info.compression_method) != UNZ_OK)

   511 		err = UNZ_ERRNO;

   512 

   513 	if (unzlocal_getLong(s->file, &file_info.dosDate) != UNZ_OK)

   514 		err = UNZ_ERRNO;

   515 

   516 	unzlocal_DosDateToTmuDate(file_info.dosDate, &file_info.tmu_date);

   517 

   518 	if (unzlocal_getLong(s->file, &file_info.crc) != UNZ_OK)

   519 		err = UNZ_ERRNO;

   520 

   521 	if (unzlocal_getLong(s->file, &file_info.compressed_size) != UNZ_OK)

   522 		err = UNZ_ERRNO;

   523 

   524 	if (unzlocal_getLong(s->file, &file_info.uncompressed_size) != UNZ_OK)

   525 		err = UNZ_ERRNO;

   526 

   527 	if (unzlocal_getShort(s->file, &file_info.size_filename) != UNZ_OK)

   528 		err = UNZ_ERRNO;

   529 

   530 	if (unzlocal_getShort(s->file, &file_info.size_file_extra) != UNZ_OK)

   531 		err = UNZ_ERRNO;

   532 

   533 	if (unzlocal_getShort(s->file, &file_info.size_file_comment) != UNZ_OK)

   534 		err = UNZ_ERRNO;

   535 

   536 	if (unzlocal_getShort(s->file, &file_info.disk_num_start) != UNZ_OK)

   537 		err = UNZ_ERRNO;

   538 

   539 	if (unzlocal_getShort(s->file, &file_info.internal_fa) != UNZ_OK)

   540 		err = UNZ_ERRNO;

   541 

   542 	if (unzlocal_getLong(s->file, &file_info.external_fa) != UNZ_OK)

   543 		err = UNZ_ERRNO;

   544 

   545 	if (unzlocal_getLong(s->file, &file_info_internal.offset_curfile) != UNZ_OK)

   546 		err = UNZ_ERRNO;

   547 

   548 	lSeek += file_info.size_filename;

   549 	if ((err == UNZ_OK) && (szFileName != NULL))

   550 	{

   551 		uLong uSizeRead ;

   552 		if (file_info.size_filename < fileNameBufferSize)

   553 		{

   554 			*(szFileName+file_info.size_filename) = '\0';

   555 			uSizeRead = file_info.size_filename;

   556 		}

   557 		else

   558 			uSizeRead = fileNameBufferSize;

   559 

   560 		if ((file_info.size_filename > 0) && (fileNameBufferSize > 0))

   561 			if (fread(szFileName, (uInt)uSizeRead, 1, s->file) != 1)

   562 				err = UNZ_ERRNO;

   563 		lSeek -= uSizeRead;

   564 	}

   565 

   566 	if ((err == UNZ_OK) && (extraField != NULL))

   567 	{

   568 		uLong uSizeRead ;

   569 		if (file_info.size_file_extra < extraFieldBufferSize)

   570 			uSizeRead = file_info.size_file_extra;

   571 		else

   572 			uSizeRead = extraFieldBufferSize;

   573 

   574 		if (lSeek != 0)

   575 			if (fseek(s->file, lSeek, SEEK_CUR) == 0)

   576 				lSeek = 0;

   577 			else

   578 				err = UNZ_ERRNO;

   579 		if ((file_info.size_file_extra > 0) && (extraFieldBufferSize > 0))

   580 			if (fread(extraField, (uInt)uSizeRead, 1, s->file) != 1)

   581 				err = UNZ_ERRNO;

   582 		lSeek += file_info.size_file_extra - uSizeRead;

   583 	}

   584 	else

   585 		lSeek += file_info.size_file_extra;

   586 

   587 	if ((err == UNZ_OK) && (szComment != NULL))

   588 	{

   589 		uLong uSizeRead ;

   590 		if (file_info.size_file_comment < commentBufferSize)

   591 		{

   592 			*(szComment+file_info.size_file_comment) = '\0';

   593 			uSizeRead = file_info.size_file_comment;

   594 		}

   595 		else

   596 			uSizeRead = commentBufferSize;

   597 

   598 		if (lSeek != 0)

   599 			if (fseek(s->file, lSeek, SEEK_CUR) == 0)

   600 				lSeek = 0;

   601 			else

   602 				err = UNZ_ERRNO;

   603 		if ((file_info.size_file_comment > 0) && (commentBufferSize > 0))

   604 			if (fread(szComment, (uInt)uSizeRead, 1, s->file) != 1)

   605 				err = UNZ_ERRNO;

   606 		lSeek += file_info.size_file_comment - uSizeRead;

   607 	}

   608 	else

   609 		lSeek += file_info.size_file_comment;

   610 

   611 	if ((err == UNZ_OK) && (pfile_info != NULL))

   612 		*pfile_info = file_info;

   613 

   614 	if ((err == UNZ_OK) && (pfile_info_internal != NULL))

   615 		*pfile_info_internal = file_info_internal;

   616 

   617 	return err;

   618 }

   619 

   620 /*

   621    Write info about the ZipFile in the *pglobal_info structure.

   622    No preparation of the structure is needed

   623    return UNZ_OK if there is no problem.

   624  */

   625 extern int ZEXPORT unzGetCurrentFileInfo(unzFile file,

   626                                          unz_file_info *pfile_info,

   627                                          char *szFileName,

   628                                          uLong fileNameBufferSize,

   629                                          void *extraField,

   630                                          uLong extraFieldBufferSize,

   631                                          char *szComment,

   632                                          uLong commentBufferSize)

   633 {

   634 	return unzlocal_GetCurrentFileInfoInternal(file, pfile_info, NULL,

   635 	                                           szFileName, fileNameBufferSize,

   636 	                                           extraField, extraFieldBufferSize,

   637 	                                           szComment, commentBufferSize);

   638 }

   639 

   640 /*

   641    Set the current file of the zipfile to the first file.

   642    return UNZ_OK if there is no problem

   643  */

   644 extern int ZEXPORT unzGoToFirstFile(unzFile file)

   645 {

   646 	int   err = UNZ_OK;

   647 	unz_s*s;

   648 	if (file == NULL)

   649 		return UNZ_PARAMERROR;

   650 	s = (unz_s *)file;

   651 	s->pos_in_central_dir = s->offset_central_dir;

   652 	s->num_file = 0;

   653 	err         = unzlocal_GetCurrentFileInfoInternal(file, &s->cur_file_info,

   654 	                                                  &s->cur_file_info_internal,

   655 	                                                  NULL, 0, NULL, 0, NULL, 0);

   656 	s->current_file_ok = (err == UNZ_OK);

   657 	return err;

   658 }

   659 

   660 /*

   661    Set the current file of the zipfile to the next file.

   662    return UNZ_OK if there is no problem

   663    return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.

   664  */

   665 extern int ZEXPORT unzGoToNextFile(unzFile file)

   666 {

   667 	unz_s*s;

   668 	int   err;

   669 

   670 	if (file == NULL)

   671 		return UNZ_PARAMERROR;

   672 	s = (unz_s *)file;

   673 	if (!s->current_file_ok)

   674 		return UNZ_END_OF_LIST_OF_FILE;

   675 	if (s->num_file+1 == s->gi.number_entry)

   676 		return UNZ_END_OF_LIST_OF_FILE;

   677 

   678 	s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +

   679 	                         s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;

   680 	s->num_file++;

   681 	err = unzlocal_GetCurrentFileInfoInternal(file, &s->cur_file_info,

   682 	                                          &s->cur_file_info_internal,

   683 	                                          NULL, 0, NULL, 0, NULL, 0);

   684 	s->current_file_ok = (err == UNZ_OK);

   685 	return err;

   686 }

   687 

   688 /*

   689    Try locate the file szFileName in the zipfile.

   690    For the iCaseSensitivity signification, see unzipStringFileNameCompare

   691 

   692    return value :

   693    UNZ_OK if the file is found. It becomes the current file.

   694    UNZ_END_OF_LIST_OF_FILE if the file is not found

   695  */

   696 extern int ZEXPORT unzLocateFile(unzFile file,

   697                                  const char *szFileName,

   698                                  int iCaseSensitivity)

   699 {

   700 	unz_s*s;

   701 	int   err;

   702 

   703 	uLong num_fileSaved;

   704 	uLong pos_in_central_dirSaved;

   705 

   706 	if (file == NULL)

   707 		return UNZ_PARAMERROR;

   708 

   709 	if (strlen(szFileName) >= UNZ_MAXFILENAMEINZIP)

   710 		return UNZ_PARAMERROR;

   711 

   712 	s = (unz_s *)file;

   713 	if (!s->current_file_ok)

   714 		return UNZ_END_OF_LIST_OF_FILE;

   715 

   716 	num_fileSaved = s->num_file;

   717 	pos_in_central_dirSaved = s->pos_in_central_dir;

   718 

   719 	err = unzGoToFirstFile(file);

   720 

   721 	while (err == UNZ_OK)

   722 	{

   723 		char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1];

   724 		unzGetCurrentFileInfo(file, NULL,

   725 		                      szCurrentFileName, sizeof(szCurrentFileName)-1,

   726 		                      NULL, 0, NULL, 0);

   727 		if (unzStringFileNameCompare(szCurrentFileName,

   728 		                             szFileName, iCaseSensitivity) == 0)

   729 			return UNZ_OK;

   730 		err = unzGoToNextFile(file);

   731 	}

   732 

   733 	s->num_file = num_fileSaved ;

   734 	s->pos_in_central_dir = pos_in_central_dirSaved ;

   735 	return err;

   736 }

   737 

   738 /*

   739    Read the local header of the current zipfile

   740    Check the coherency of the local header and info in the end of central

   741         directory about this file

   742    store in *piSizeVar the size of extra info in local header

   743         (filename and size of extra field data)

   744  */

   745 local int unzlocal_CheckCurrentFileCoherencyHeader(unz_s *s,

   746                                                    uInt *piSizeVar,

   747                                                    uLong *poffset_local_extrafield,

   748                                                    uInt *psize_local_extrafield)

   749 {

   750 	uLong uMagic, uData, uFlags;

   751 	uLong size_filename;

   752 	uLong size_extra_field;

   753 	int   err = UNZ_OK;

   754 

   755 	*piSizeVar = 0;

   756 	*poffset_local_extrafield = 0;

   757 	*psize_local_extrafield   = 0;

   758 

   759 	if (fseek(s->file, s->cur_file_info_internal.offset_curfile +

   760 	          s->byte_before_the_zipfile, SEEK_SET) != 0)

   761 		return UNZ_ERRNO;

   762 

   763 	if (err == UNZ_OK)

   764 		if (unzlocal_getLong(s->file, &uMagic) != UNZ_OK)

   765 			err = UNZ_ERRNO;

   766 		else if (uMagic != 0x04034b50)

   767 			err = UNZ_BADZIPFILE;

   768 

   769 	if (unzlocal_getShort(s->file, &uData) != UNZ_OK)

   770 		err = UNZ_ERRNO;

   771 /*

   772         else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion))

   773                 err=UNZ_BADZIPFILE;

   774  */

   775 	if (unzlocal_getShort(s->file, &uFlags) != UNZ_OK)

   776 		err = UNZ_ERRNO;

   777 

   778 	if (unzlocal_getShort(s->file, &uData) != UNZ_OK)

   779 		err = UNZ_ERRNO;

   780 	else if ((err == UNZ_OK) && (uData != s->cur_file_info.compression_method))

   781 		err = UNZ_BADZIPFILE;

   782 

   783 	if ((err == UNZ_OK) && (s->cur_file_info.compression_method != 0) &&

   784 	    (s->cur_file_info.compression_method != Z_DEFLATED))

   785 		err = UNZ_BADZIPFILE;

   786 

   787 	if (unzlocal_getLong(s->file, &uData) != UNZ_OK)    /* date/time */

   788 		err = UNZ_ERRNO;

   789 

   790 	if (unzlocal_getLong(s->file, &uData) != UNZ_OK)    /* crc */

   791 		err = UNZ_ERRNO;

   792 	else if ((err == UNZ_OK) && (uData != s->cur_file_info.crc) &&

   793 	         ((uFlags & 8) == 0))

   794 		err = UNZ_BADZIPFILE;

   795 

   796 	if (unzlocal_getLong(s->file, &uData) != UNZ_OK)    /* size compr */

   797 		err = UNZ_ERRNO;

   798 	else if ((err == UNZ_OK) && (uData != s->cur_file_info.compressed_size) &&

   799 	         ((uFlags & 8) == 0))

   800 		err = UNZ_BADZIPFILE;

   801 

   802 	if (unzlocal_getLong(s->file, &uData) != UNZ_OK)    /* size uncompr */

   803 		err = UNZ_ERRNO;

   804 	else if ((err == UNZ_OK) && (uData != s->cur_file_info.uncompressed_size) &&

   805 	         ((uFlags & 8) == 0))

   806 		err = UNZ_BADZIPFILE;

   807 

   808 	if (unzlocal_getShort(s->file, &size_filename) != UNZ_OK)

   809 		err = UNZ_ERRNO;

   810 	else if ((err == UNZ_OK) && (size_filename != s->cur_file_info.size_filename))

   811 		err = UNZ_BADZIPFILE;

   812 

   813 	*piSizeVar += (uInt)size_filename;

   814 

   815 	if (unzlocal_getShort(s->file, &size_extra_field) != UNZ_OK)

   816 		err = UNZ_ERRNO;

   817 	*poffset_local_extrafield = s->cur_file_info_internal.offset_curfile +

   818 	                            SIZEZIPLOCALHEADER + size_filename;

   819 	*psize_local_extrafield = (uInt)size_extra_field;

   820 

   821 	*piSizeVar += (uInt)size_extra_field;

   822 

   823 	return err;

   824 }

   825 

   826 /*

   827    Open for reading data the current file in the zipfile.

   828    If there is no error and the file is opened, the return value is UNZ_OK.

   829  */

   830 extern int ZEXPORT unzOpenCurrentFile(unzFile file)

   831 {

   832 	int   err = UNZ_OK;

   833 	int   Store;

   834 	uInt  iSizeVar;

   835 	unz_s*s;

   836 	file_in_zip_read_info_s*pfile_in_zip_read_info;

   837 	uLong offset_local_extrafield;      /* offset of the local extra field */

   838 	uInt  size_local_extrafield;        /* size of the local extra field */

   839 

   840 	if (file == NULL)

   841 		return UNZ_PARAMERROR;

   842 	s = (unz_s *)file;

   843 	if (!s->current_file_ok)

   844 		return UNZ_PARAMERROR;

   845 

   846 	if (s->pfile_in_zip_read != NULL)

   847 		unzCloseCurrentFile(file);

   848 

   849 	if (unzlocal_CheckCurrentFileCoherencyHeader(s, &iSizeVar,

   850 	                                             &offset_local_extrafield, &size_local_extrafield) != UNZ_OK)

   851 		return UNZ_BADZIPFILE;

   852 

   853 	pfile_in_zip_read_info = (file_in_zip_read_info_s *)

   854 	                         ALLOC(sizeof(file_in_zip_read_info_s));

   855 	if (pfile_in_zip_read_info == NULL)

   856 		return UNZ_INTERNALERROR;

   857 

   858 	pfile_in_zip_read_info->read_buffer = (char *)ALLOC(UNZ_BUFSIZE);

   859 	pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;

   860 	pfile_in_zip_read_info->size_local_extrafield   = size_local_extrafield;

   861 	pfile_in_zip_read_info->pos_local_extrafield    = 0;

   862 

   863 	if (pfile_in_zip_read_info->read_buffer == NULL)

   864 	{

   865 		TRYFREE(pfile_in_zip_read_info);

   866 		return UNZ_INTERNALERROR;

   867 	}

   868 

   869 	pfile_in_zip_read_info->stream_initialised = 0;

   870 

   871 	if ((s->cur_file_info.compression_method != 0) &&

   872 	    (s->cur_file_info.compression_method != Z_DEFLATED))

   873 		err = UNZ_BADZIPFILE;

   874 	Store = s->cur_file_info.compression_method == 0;

   875 

   876 	pfile_in_zip_read_info->crc32_wait         = s->cur_file_info.crc;

   877 	pfile_in_zip_read_info->crc32              = 0;

   878 	pfile_in_zip_read_info->compression_method =

   879 	    s->cur_file_info.compression_method;

   880 	pfile_in_zip_read_info->file = s->file;

   881 	pfile_in_zip_read_info->byte_before_the_zipfile = s->byte_before_the_zipfile;

   882 

   883 	pfile_in_zip_read_info->stream.total_out = 0;

   884 

   885 	if (!Store)

   886 	{

   887 		pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;

   888 		pfile_in_zip_read_info->stream.zfree  = (free_func)0;

   889 		pfile_in_zip_read_info->stream.opaque = (voidpf)0;

   890 

   891 		err = inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);

   892 		if (err == Z_OK)

   893 			pfile_in_zip_read_info->stream_initialised = 1;

   894 		/* windowBits is passed < 0 to tell that there is no zlib header.

   895 		 * Note that in this case inflate *requires* an extra "dummy" byte

   896 		 * after the compressed stream in order to complete decompression and

   897 		 * return Z_STREAM_END.

   898 		 * In unzip, i don't wait absolutely Z_STREAM_END because I known the

   899 		 * size of both compressed and uncompressed data

   900 		 */

   901 	}

   902 	pfile_in_zip_read_info->rest_read_compressed =

   903 	    s->cur_file_info.compressed_size ;

   904 	pfile_in_zip_read_info->rest_read_uncompressed =

   905 	    s->cur_file_info.uncompressed_size ;

   906 

   907 	pfile_in_zip_read_info->pos_in_zipfile =

   908 	    s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER +

   909 	    iSizeVar;

   910 

   911 	pfile_in_zip_read_info->stream.avail_in = (uInt)0;

   912 

   913 	s->pfile_in_zip_read = pfile_in_zip_read_info;

   914 	return UNZ_OK;

   915 }

   916 

   917 /*

   918    Read bytes from the current file.

   919    buf contain buffer where data must be copied

   920    len the size of buf.

   921 

   922    return the number of byte copied if somes bytes are copied

   923    return 0 if the end of file was reached

   924    return <0 with error code if there is an error

   925     (UNZ_ERRNO for IO error, or zLib error for uncompress error)

   926  */

   927 extern int ZEXPORT unzReadCurrentFile(unzFile file, voidp buf, unsigned len)

   928 {

   929 	int   err   = UNZ_OK;

   930 	uInt  iRead = 0;

   931 	unz_s*s;

   932 	file_in_zip_read_info_s*pfile_in_zip_read_info;

   933 	if (file == NULL)

   934 		return UNZ_PARAMERROR;

   935 	s = (unz_s *)file;

   936 	pfile_in_zip_read_info = s->pfile_in_zip_read;

   937 

   938 	if (pfile_in_zip_read_info == NULL)

   939 		return UNZ_PARAMERROR;

   940 

   941 	if ((pfile_in_zip_read_info->read_buffer == NULL))

   942 		return UNZ_END_OF_LIST_OF_FILE;

   943 	if (len == 0)

   944 		return 0;

   945 

   946 	pfile_in_zip_read_info->stream.next_out = (Bytef *)buf;

   947 

   948 	pfile_in_zip_read_info->stream.avail_out = (uInt)len;

   949 

   950 	if (len > pfile_in_zip_read_info->rest_read_uncompressed)

   951 		pfile_in_zip_read_info->stream.avail_out =

   952 		    (uInt)pfile_in_zip_read_info->rest_read_uncompressed;

   953 

   954 	while (pfile_in_zip_read_info->stream.avail_out > 0)

   955 	{

   956 		if ((pfile_in_zip_read_info->stream.avail_in == 0) &&

   957 		    (pfile_in_zip_read_info->rest_read_compressed > 0))

   958 		{

   959 			uInt uReadThis = UNZ_BUFSIZE;

   960 			if (pfile_in_zip_read_info->rest_read_compressed < uReadThis)

   961 				uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;

   962 			if (uReadThis == 0)

   963 				return UNZ_EOF;

   964 			if (fseek(pfile_in_zip_read_info->file,

   965 			          pfile_in_zip_read_info->pos_in_zipfile +

   966 			          pfile_in_zip_read_info->byte_before_the_zipfile, SEEK_SET) != 0)

   967 				return UNZ_ERRNO;

   968 			if (fread(pfile_in_zip_read_info->read_buffer, uReadThis, 1,

   969 			          pfile_in_zip_read_info->file) != 1)

   970 				return UNZ_ERRNO;

   971 			pfile_in_zip_read_info->pos_in_zipfile += uReadThis;

   972 

   973 			pfile_in_zip_read_info->rest_read_compressed -= uReadThis;

   974 

   975 			pfile_in_zip_read_info->stream.next_in =

   976 			    (Bytef *)pfile_in_zip_read_info->read_buffer;

   977 			pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;

   978 		}

   979 

   980 		if (pfile_in_zip_read_info->compression_method == 0)

   981 		{

   982 			uInt uDoCopy, i ;

   983 			if (pfile_in_zip_read_info->stream.avail_out <

   984 			    pfile_in_zip_read_info->stream.avail_in)

   985 				uDoCopy = pfile_in_zip_read_info->stream.avail_out ;

   986 			else

   987 				uDoCopy = pfile_in_zip_read_info->stream.avail_in ;

   988 

   989 			for (i = 0; i < uDoCopy; i++)

   990 				*(pfile_in_zip_read_info->stream.next_out+i) =

   991 				    *(pfile_in_zip_read_info->stream.next_in+i);

   992 

   993 			pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,

   994 			                                      pfile_in_zip_read_info->stream.next_out,

   995 			                                      uDoCopy);

   996 			pfile_in_zip_read_info->rest_read_uncompressed -= uDoCopy;

   997 			pfile_in_zip_read_info->stream.avail_in        -= uDoCopy;

   998 			pfile_in_zip_read_info->stream.avail_out       -= uDoCopy;

   999 			pfile_in_zip_read_info->stream.next_out        += uDoCopy;

  1000 			pfile_in_zip_read_info->stream.next_in         += uDoCopy;

  1001 			pfile_in_zip_read_info->stream.total_out       += uDoCopy;

  1002 			iRead += uDoCopy;

  1003 		}

  1004 		else

  1005 		{

  1006 			uLong        uTotalOutBefore, uTotalOutAfter;

  1007 			const Bytef *bufBefore;

  1008 			uLong        uOutThis;

  1009 			int flush = Z_SYNC_FLUSH;

  1010 

  1011 			uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;

  1012 			bufBefore       = pfile_in_zip_read_info->stream.next_out;

  1013 

  1014 			/*

  1015 			   if ((pfile_in_zip_read_info->rest_read_uncompressed ==

  1016 			         pfile_in_zip_read_info->stream.avail_out) &&

  1017 			        (pfile_in_zip_read_info->rest_read_compressed == 0))

  1018 			        flush = Z_FINISH;

  1019 			 */

  1020 			err = inflate(&pfile_in_zip_read_info->stream, flush);

  1021 

  1022 			uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;

  1023 			uOutThis       = uTotalOutAfter-uTotalOutBefore;

  1024 

  1025 			pfile_in_zip_read_info->crc32 =

  1026 			    crc32(pfile_in_zip_read_info->crc32, bufBefore,

  1027 			          (uInt)(uOutThis));

  1028 

  1029 			pfile_in_zip_read_info->rest_read_uncompressed -=

  1030 			    uOutThis;

  1031 

  1032 			iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);

  1033 

  1034 			if (err == Z_STREAM_END)

  1035 				return (iRead == 0) ? UNZ_EOF : iRead;

  1036 			if (err != Z_OK)

  1037 				break;

  1038 		}

  1039 	}

  1040 

  1041 	if (err == Z_OK)

  1042 		return iRead;

  1043 	return err;

  1044 }

  1045 

  1046 /*

  1047    Give the current position in uncompressed data

  1048  */

  1049 extern z_off_t ZEXPORT unztell(unzFile file)

  1050 {

  1051 	unz_s*s;

  1052 	file_in_zip_read_info_s*pfile_in_zip_read_info;

  1053 	if (file == NULL)

  1054 		return UNZ_PARAMERROR;

  1055 	s = (unz_s *)file;

  1056 	pfile_in_zip_read_info = s->pfile_in_zip_read;

  1057 

  1058 	if (pfile_in_zip_read_info == NULL)

  1059 		return UNZ_PARAMERROR;

  1060 

  1061 	return (z_off_t)pfile_in_zip_read_info->stream.total_out;

  1062 }

  1063 

  1064 /*

  1065    return 1 if the end of file was reached, 0 elsewhere

  1066  */

  1067 extern int ZEXPORT unzeof(unzFile file)

  1068 {

  1069 	unz_s*s;

  1070 	file_in_zip_read_info_s*pfile_in_zip_read_info;

  1071 	if (file == NULL)

  1072 		return UNZ_PARAMERROR;

  1073 	s = (unz_s *)file;

  1074 	pfile_in_zip_read_info = s->pfile_in_zip_read;

  1075 

  1076 	if (pfile_in_zip_read_info == NULL)

  1077 		return UNZ_PARAMERROR;

  1078 

  1079 	if (pfile_in_zip_read_info->rest_read_uncompressed == 0)

  1080 		return 1;

  1081 	else

  1082 		return 0;

  1083 }

  1084 

  1085 /*

  1086    Read extra field from the current file (opened by unzOpenCurrentFile)

  1087    This is the local-header version of the extra field (sometimes, there is

  1088     more info in the local-header version than in the central-header)

  1089 

  1090    if buf==NULL, it return the size of the local extra field that can be read

  1091 

  1092    if buf!=NULL, len is the size of the buffer, the extra header is copied in

  1093         buf.

  1094    the return value is the number of bytes copied in buf, or (if <0)

  1095         the error code

  1096  */

  1097 extern int ZEXPORT unzGetLocalExtrafield(unzFile file, voidp buf, unsigned len)

  1098 {

  1099 	unz_s*s;

  1100 	file_in_zip_read_info_s*pfile_in_zip_read_info;

  1101 	uInt  read_now;

  1102 	uLong size_to_read;

  1103 

  1104 	if (file == NULL)

  1105 		return UNZ_PARAMERROR;

  1106 	s = (unz_s *)file;

  1107 	pfile_in_zip_read_info = s->pfile_in_zip_read;

  1108 

  1109 	if (pfile_in_zip_read_info == NULL)

  1110 		return UNZ_PARAMERROR;

  1111 

  1112 	size_to_read = (pfile_in_zip_read_info->size_local_extrafield -

  1113 	                pfile_in_zip_read_info->pos_local_extrafield);

  1114 

  1115 	if (buf == NULL)

  1116 		return (int)size_to_read;

  1117 

  1118 	if (len > size_to_read)

  1119 		read_now = (uInt)size_to_read;

  1120 	else

  1121 		read_now = (uInt)len ;

  1122 

  1123 	if (read_now == 0)

  1124 		return 0;

  1125 

  1126 	if (fseek(pfile_in_zip_read_info->file,

  1127 	          pfile_in_zip_read_info->offset_local_extrafield +

  1128 	          pfile_in_zip_read_info->pos_local_extrafield, SEEK_SET) != 0)

  1129 		return UNZ_ERRNO;

  1130 

  1131 	if (fread(buf, (uInt)size_to_read, 1, pfile_in_zip_read_info->file) != 1)

  1132 		return UNZ_ERRNO;

  1133 

  1134 	return (int)read_now;

  1135 }

  1136 

  1137 /*

  1138    Close the file in zip opened with unzipOpenCurrentFile

  1139    Return UNZ_CRCERROR if all the file was read but the CRC is not good

  1140  */

  1141 extern int ZEXPORT unzCloseCurrentFile(unzFile file)

  1142 {

  1143 	int err = UNZ_OK;

  1144 

  1145 	unz_s*s;

  1146 	file_in_zip_read_info_s*pfile_in_zip_read_info;

  1147 	if (file == NULL)

  1148 		return UNZ_PARAMERROR;

  1149 	s = (unz_s *)file;

  1150 	pfile_in_zip_read_info = s->pfile_in_zip_read;

  1151 

  1152 	if (pfile_in_zip_read_info == NULL)

  1153 		return UNZ_PARAMERROR;

  1154 

  1155 	if (pfile_in_zip_read_info->rest_read_uncompressed == 0)

  1156 	{

  1157 		if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait)

  1158 			err = UNZ_CRCERROR;

  1159 	}

  1160 

  1161 	TRYFREE(pfile_in_zip_read_info->read_buffer);

  1162 	pfile_in_zip_read_info->read_buffer = NULL;

  1163 	if (pfile_in_zip_read_info->stream_initialised)

  1164 		inflateEnd(&pfile_in_zip_read_info->stream);

  1165 

  1166 	pfile_in_zip_read_info->stream_initialised = 0;

  1167 	TRYFREE(pfile_in_zip_read_info);

  1168 

  1169 	s->pfile_in_zip_read = NULL;

  1170 

  1171 	return err;

  1172 }

  1173 

  1174 /*

  1175    Get the global comment string of the ZipFile, in the szComment buffer.

  1176    uSizeBuf is the size of the szComment buffer.

  1177    return the number of byte copied or an error code <0

  1178  */

  1179 extern int ZEXPORT unzGetGlobalComment(unzFile file,

  1180                                        char *szComment,

  1181                                        uLong uSizeBuf)

  1182 {

  1183 	//int err=UNZ_OK;

  1184 	unz_s*s;

  1185 	uLong uReadThis ;

  1186 	if (file == NULL)

  1187 		return UNZ_PARAMERROR;

  1188 	s = (unz_s *)file;

  1189 

  1190 	uReadThis = uSizeBuf;

  1191 	if (uReadThis > s->gi.size_comment)

  1192 		uReadThis = s->gi.size_comment;

  1193 

  1194 	if (fseek(s->file, s->central_pos+22, SEEK_SET) != 0)

  1195 		return UNZ_ERRNO;

  1196 

  1197 	if (uReadThis > 0)

  1198 	{

  1199 		*szComment = '\0';

  1200 		if (fread(szComment, (uInt)uReadThis, 1, s->file) != 1)

  1201 			return UNZ_ERRNO;

  1202 	}

  1203 

  1204 	if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment))

  1205 		*(szComment+s->gi.size_comment) = '\0';

  1206 	return (int)uReadThis;

  1207 }

  1208
author	Robert McIntyre <rlm@mit.edu>
date	Sat, 03 Mar 2012 10:31:27 -0600
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