Utility functions for reading from zip files. Some small enhancements to allow direct opening of non-compressed files. Requires zlib.
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@26 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike
parent
985c70e051
commit
ac94f7039c
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/* unzip.c -- IO on .zip files using zlib
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Version 0.15 beta, Mar 19th, 1998,
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Read unzip.h for more info
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*/
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//# pragma comment (lib, "zip/zlib.lib")
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#ifndef __linux__
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#define ZEXPORT VARGS
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#endif
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#include "zlib.h"
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#include "unzip.h"
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#ifdef STDC
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# include <stddef.h>
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# include <string.h>
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# include <stdlib.h>
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#endif
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#ifdef NO_ERRNO_H
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extern int errno;
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#else
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# include <errno.h>
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#endif
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#ifndef local
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# define local static
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#endif
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/* compile with -Dlocal if your debugger can't find static symbols */
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#if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) && \
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!defined(CASESENSITIVITYDEFAULT_NO)
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#define CASESENSITIVITYDEFAULT_NO
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#endif
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#ifndef UNZ_BUFSIZE
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#define UNZ_BUFSIZE (16384)
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#endif
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#ifndef UNZ_MAXFILENAMEINZIP
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#define UNZ_MAXFILENAMEINZIP (256)
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#endif
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#ifndef ALLOC
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# define ALLOC(size) (malloc(size))
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#endif
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#ifndef TRYFREE
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# define TRYFREE(p) {if (p) free(p);}
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#endif
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#define SIZECENTRALDIRITEM (0x2e)
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#define SIZEZIPLOCALHEADER (0x1e)
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/* I've found an old Unix (a SunOS 4.1.3_U1) without all SEEK_* defined.... */
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#ifndef SEEK_CUR
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#define SEEK_CUR 1
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#endif
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#ifndef SEEK_END
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#define SEEK_END 2
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#endif
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#ifndef SEEK_SET
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#define SEEK_SET 0
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#endif
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/* unz_file_info_interntal contain internal info about a file in zipfile*/
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typedef struct unz_file_info_internal_s {
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uLong offset_curfile;/* relative offset of local header 4 bytes */
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} unz_file_info_internal;
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/* file_in_zip_read_info_s contain internal information about a file in zipfile,
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when reading and decompress it */
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typedef struct {
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char *read_buffer; /* internal buffer for compressed data */
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z_stream stream; /* zLib stream structure for inflate */
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uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
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uLong stream_initialised; /* flag set if stream structure is initialised*/
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uLong offset_local_extrafield;/* offset of the local extra field */
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uInt size_local_extrafield;/* size of the local extra field */
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uLong pos_local_extrafield; /* position in the local extra field in read*/
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uLong crc32; /* crc32 of all data uncompressed */
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uLong crc32_wait; /* crc32 we must obtain after decompress all */
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uLong rest_read_compressed; /* number of byte to be decompressed */
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uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/
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FILE* file; /* io structore of the zipfile */
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uLong compression_method; /* compression method (0==store) */
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uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
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} file_in_zip_read_info_s;
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/* unz_s contain internal information about the zipfile
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*/
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typedef struct {
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FILE* file; /* io structore of the zipfile */
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unz_global_info gi; /* public global information */
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uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
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uLong num_file; /* number of the current file in the zipfile*/
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uLong pos_in_central_dir; /* pos of the current file in the central dir*/
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uLong current_file_ok; /* flag about the usability of the current file*/
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uLong central_pos; /* position of the beginning of the central dir*/
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uLong size_central_dir; /* size of the central directory */
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uLong offset_central_dir; /* offset of start of central directory with
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respect to the starting disk number */
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unz_file_info cur_file_info; /* public info about the current file in zip*/
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unz_file_info_internal cur_file_info_internal; /* private info about it*/
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file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current
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file if we are decompressing it */
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} unz_s;
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/* ===========================================================================
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Read a byte from a gz_stream; update next_in and avail_in. Return EOF
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for end of file.
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IN assertion: the stream s has been sucessfully opened for reading.
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*/
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local int unzlocal_getShort(FILE *fin,uLong *pi) {
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unsigned short c;
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int err = fread(&c, 2, 1, fin);
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if (err==1) {
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*pi = (uLong)c;
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return UNZ_OK;
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} else {
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if (ferror(fin)) return UNZ_ERRNO;
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else return UNZ_EOF;
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}
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}
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local int unzlocal_getLong(FILE *fin,uLong *pi) {
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uLong c;
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int err = fread(&c, 4, 1, fin);
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if (err==1) {
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*pi = (uLong)c;
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return UNZ_OK;
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} else {
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if (ferror(fin)) return UNZ_ERRNO;
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else return UNZ_EOF;
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}
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}
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#define BUFREADCOMMENT (0x400)
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/*
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Locate the Central directory of a zipfile (at the end, just before
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the global comment)
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*/
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local uLong unzlocal_SearchCentralDir(FILE *fin) {
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unsigned char* buf;
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uLong uSizeFile;
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uLong uBackRead;
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uLong uMaxBack=0xffff; /* maximum size of global comment */
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uLong uPosFound=0;
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if (fseek(fin,0,SEEK_END) != 0) return 0;
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uSizeFile = ftell( fin );
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if (uMaxBack>uSizeFile) uMaxBack = uSizeFile;
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buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4);
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if (!buf) return 0;
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uBackRead = 4;
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while (uBackRead<uMaxBack) {
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uLong uReadSize,uReadPos ;
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int i;
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if (uBackRead+BUFREADCOMMENT>uMaxBack) uBackRead = uMaxBack;
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else uBackRead+=BUFREADCOMMENT;
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uReadPos = uSizeFile-uBackRead ;
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uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ?
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(BUFREADCOMMENT+4) : (uSizeFile-uReadPos);
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if (fseek(fin,uReadPos,SEEK_SET)!=0) break;
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if (fread(buf,(uInt)uReadSize,1,fin)!=1) break;
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for (i=(int)uReadSize-3; (i--)>0;)
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if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) &&
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((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06)) {
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uPosFound = uReadPos+i;
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break;
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}
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if (uPosFound!=0) break;
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}
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TRYFREE(buf);
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return uPosFound;
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}
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/*
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Open a Zip file. path contain the full pathname (by example,
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on a Windows NT computer "c:\\test\\zlib109.zip" or on an Unix computer
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"zlib/zlib109.zip".
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If the zipfile cannot be opened (file don't exist or in not valid), the
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return value is NULL.
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Else, the return value is a unzFile Handle, usable with other function
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of this unzip package.
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*/
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extern unzFile ZEXPORT unzOpen (const char *path) {
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unz_s us;
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unz_s *s;
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uLong central_pos,uL;
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FILE * fin ;
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uLong number_disk; /* number of the current dist, used for
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spaning ZIP, unsupported, always 0*/
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uLong number_disk_with_CD; /* number the the disk with central dir, used
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for spaning ZIP, unsupported, always 0*/
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uLong number_entry_CD; /* total number of entries in
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the central dir
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(same than number_entry on nospan) */
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int err=UNZ_OK;
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fin=fopen(path,"rb");
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if (!fin) return NULL;
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central_pos = unzlocal_SearchCentralDir(fin);
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if (!central_pos) err=UNZ_ERRNO;
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if (fseek(fin,central_pos,SEEK_SET)!=0) err=UNZ_ERRNO;
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/* the signature, already checked */
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if (unzlocal_getLong(fin,&uL)!=UNZ_OK) err=UNZ_ERRNO;
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/* number of this disk */
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if (unzlocal_getShort(fin,&number_disk)!=UNZ_OK) err=UNZ_ERRNO;
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/* number of the disk with the start of the central directory */
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if (unzlocal_getShort(fin,&number_disk_with_CD)!=UNZ_OK) err=UNZ_ERRNO;
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/* total number of entries in the central dir on this disk */
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if (unzlocal_getShort(fin,&us.gi.number_entry)!=UNZ_OK) err=UNZ_ERRNO;
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/* total number of entries in the central dir */
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if (unzlocal_getShort(fin,&number_entry_CD)!=UNZ_OK) err=UNZ_ERRNO;
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if ((number_entry_CD!=us.gi.number_entry) || (number_disk_with_CD!=0) || (number_disk!=0)) err=UNZ_BADZIPFILE;
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/* size of the central directory */
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if (unzlocal_getLong(fin,&us.size_central_dir)!=UNZ_OK) err=UNZ_ERRNO;
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/* offset of start of central directory with respect to the
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starting disk number */
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if (unzlocal_getLong(fin,&us.offset_central_dir)!=UNZ_OK) err=UNZ_ERRNO;
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/* zipfile comment length */
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if (unzlocal_getShort(fin,&us.gi.size_comment)!=UNZ_OK) err=UNZ_ERRNO;
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if ((central_pos<us.offset_central_dir+us.size_central_dir) && (err==UNZ_OK)) err=UNZ_BADZIPFILE;
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if (err!=UNZ_OK) {
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fclose(fin);
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return NULL;
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}
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us.file=fin;
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us.byte_before_the_zipfile = central_pos - (us.offset_central_dir+us.size_central_dir);
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us.central_pos = central_pos;
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us.pfile_in_zip_read = NULL;
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s=(unz_s*)ALLOC(sizeof(unz_s));
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*s=us;
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unzGoToFirstFile((unzFile)s);
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return (unzFile)s;
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}
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/*
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Close a ZipFile opened with unzipOpen.
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If there is files inside the .Zip opened with unzipOpenCurrentFile (see later),
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these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
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return UNZ_OK if there is no problem. */
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extern int ZEXPORT unzClose (unzFile file) {
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unz_s* s;
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if (!file) return UNZ_PARAMERROR;
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s=(unz_s*)file;
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if (s->pfile_in_zip_read) unzCloseCurrentFile(file);
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fclose(s->file);
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TRYFREE(s);
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return UNZ_OK;
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}
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/*
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Write info about the ZipFile in the *pglobal_info structure.
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No preparation of the structure is needed
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return UNZ_OK if there is no problem. */
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extern int ZEXPORT unzGetGlobalInfo (unzFile file, unz_global_info *pglobal_info) {
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unz_s* s;
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if (!file) return UNZ_PARAMERROR;
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s=(unz_s*)file;
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*pglobal_info=s->gi;
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return UNZ_OK;
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}
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/*
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Get Info about the current file in the zipfile, with internal only info
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*/
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local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file,
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unz_file_info *pfile_info,
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unz_file_info_internal
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*pfile_info_internal,
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char *szFileName,
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uLong fileNameBufferSize,
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void *extraField,
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uLong extraFieldBufferSize,
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char *szComment,
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uLong commentBufferSize));
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local int unzlocal_GetCurrentFileInfoInternal (unzFile file,
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unz_file_info *pfile_info,
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unz_file_info_internal *pfile_info_internal,
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char *szFileName, uLong fileNameBufferSize,
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void *extraField, uLong extraFieldBufferSize,
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char *szComment, uLong commentBufferSize) {
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unz_s* s;
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unz_file_info file_info;
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unz_file_info_internal file_info_internal;
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int err=UNZ_OK;
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uLong uMagic;
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long lSeek=0;
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if (!file) return UNZ_PARAMERROR;
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s=(unz_s*)file;
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if (fseek(s->file,s->pos_in_central_dir+s->byte_before_the_zipfile,SEEK_SET)!=0) err=UNZ_ERRNO;
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/* we check the magic */
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if (err==UNZ_OK)
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{
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if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK) err=UNZ_ERRNO;
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else if (uMagic!=0x02014b50) err=UNZ_BADZIPFILE;
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}
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fread(&file_info, sizeof(file_info)-2*4, 1, s->file); // 2*4 is the size of 2 my vars
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if (unzlocal_getLong(s->file,&file_info_internal.offset_curfile) != UNZ_OK) err=UNZ_ERRNO;
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file_info.offset = file_info_internal.offset_curfile;
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file_info.c_offset = s->pos_in_central_dir;
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lSeek+=file_info.size_filename;
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if ((err==UNZ_OK) && (szFileName))
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{
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uLong uSizeRead ;
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if (file_info.size_filename<fileNameBufferSize)
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{
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*(szFileName+file_info.size_filename)='\0';
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uSizeRead = file_info.size_filename;
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}
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else uSizeRead = fileNameBufferSize;
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if ((file_info.size_filename>0) && (fileNameBufferSize>0))
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if (fread(szFileName,(uInt)uSizeRead,1,s->file)!=1) err=UNZ_ERRNO;
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lSeek -= uSizeRead;
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}
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if ((err==UNZ_OK) && (extraField))
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{
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uLong uSizeRead ;
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if (file_info.size_file_extra<extraFieldBufferSize) uSizeRead = file_info.size_file_extra;
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else uSizeRead = extraFieldBufferSize;
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if (lSeek!=0)
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{
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if (fseek(s->file,lSeek,SEEK_CUR)==0) lSeek=0;
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else err=UNZ_ERRNO;
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}
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if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0))
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if (fread(extraField,(uInt)uSizeRead,1,s->file)!=1) err=UNZ_ERRNO;
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lSeek += file_info.size_file_extra - uSizeRead;
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}
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else lSeek+=file_info.size_file_extra;
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if ((err==UNZ_OK) && (szComment))
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{
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uLong uSizeRead ;
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if (file_info.size_file_comment<commentBufferSize) {
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*(szComment+file_info.size_file_comment)='\0';
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uSizeRead = file_info.size_file_comment;
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} else uSizeRead = commentBufferSize;
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if (lSeek!=0)
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{
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if (fseek(s->file,lSeek,SEEK_CUR)==0) lSeek=0;
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else err=UNZ_ERRNO;
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}
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if ((file_info.size_file_comment>0) && (commentBufferSize>0))
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if (fread(szComment,(uInt)uSizeRead,1,s->file)!=1) err=UNZ_ERRNO;
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lSeek+=file_info.size_file_comment - uSizeRead;
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} else lSeek+=file_info.size_file_comment;
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if ((err==UNZ_OK) && (pfile_info)) *pfile_info=file_info;
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if ((err==UNZ_OK) && (pfile_info_internal)) *pfile_info_internal=file_info_internal;
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return err;
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}
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/*
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Write info about the ZipFile in the *pglobal_info structure.
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No preparation of the structure is needed
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return UNZ_OK if there is no problem.
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*/
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extern int ZEXPORT unzGetCurrentFileInfo (unzFile file,
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unz_file_info *pfile_info,
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char *szFileName, uLong fileNameBufferSize,
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void *extraField, uLong extraFieldBufferSize,
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char *szComment, uLong commentBufferSize) {
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return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL,
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szFileName,fileNameBufferSize,
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extraField,extraFieldBufferSize,
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szComment,commentBufferSize);
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}
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/*
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Set the current file of the zipfile to the first file.
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return UNZ_OK if there is no problem
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*/
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extern int ZEXPORT unzGoToFirstFile (unzFile file) {
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int err=UNZ_OK;
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unz_s* s;
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if (!file) return UNZ_PARAMERROR;
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s=(unz_s*)file;
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s->pos_in_central_dir=s->offset_central_dir;
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s->num_file=0;
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err=unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
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&s->cur_file_info_internal,
|
||||
NULL,0,NULL,0,NULL,0);
|
||||
s->current_file_ok = (err == UNZ_OK);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Set the current file of the zipfile to the next file.
|
||||
return UNZ_OK if there is no problem
|
||||
return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
|
||||
*/
|
||||
extern int ZEXPORT unzGoToNextFile (unzFile file) {
|
||||
unz_s* s;
|
||||
int err;
|
||||
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
if (!s->current_file_ok) return UNZ_END_OF_LIST_OF_FILE;
|
||||
if (s->num_file+1==s->gi.number_entry) return UNZ_END_OF_LIST_OF_FILE;
|
||||
|
||||
s->pos_in_central_dir += SIZECENTRALDIRITEM + s->cur_file_info.size_filename +
|
||||
s->cur_file_info.size_file_extra + s->cur_file_info.size_file_comment ;
|
||||
s->num_file++;
|
||||
err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,
|
||||
&s->cur_file_info_internal,
|
||||
NULL,0,NULL,0,NULL,0);
|
||||
s->current_file_ok = (err == UNZ_OK);
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
extern int ZEXPORT unzLocateFileMy (unzFile file, uLong num, uLong pos) {
|
||||
unz_s* s;
|
||||
s = (unz_s *)file;
|
||||
s->pos_in_central_dir = pos;
|
||||
s->num_file = num;
|
||||
unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info,&s->cur_file_info_internal,NULL,0,NULL,0,NULL,0);
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Read the local header of the current zipfile
|
||||
Check the coherency of the local header and info in the end of central
|
||||
directory about this file
|
||||
store in *piSizeVar the size of extra info in local header
|
||||
(filename and size of extra field data)
|
||||
*/
|
||||
local int unzlocal_CheckCurrentFileCoherencyHeader (unz_s *s, uInt *piSizeVar,
|
||||
uLong *poffset_local_extrafield,
|
||||
uInt *psize_local_extrafield) {
|
||||
uLong uMagic,uData,uFlags;
|
||||
uLong size_filename;
|
||||
uLong size_extra_field;
|
||||
int err=UNZ_OK;
|
||||
|
||||
*piSizeVar = 0;
|
||||
*poffset_local_extrafield = 0;
|
||||
*psize_local_extrafield = 0;
|
||||
|
||||
if (fseek(s->file,s->cur_file_info_internal.offset_curfile + s->byte_before_the_zipfile,SEEK_SET)!=0) return UNZ_ERRNO;
|
||||
|
||||
|
||||
if (err==UNZ_OK)
|
||||
{
|
||||
if (unzlocal_getLong(s->file,&uMagic) != UNZ_OK) err=UNZ_ERRNO;
|
||||
else if (uMagic!=0x04034b50) err=UNZ_BADZIPFILE;
|
||||
}
|
||||
|
||||
if (unzlocal_getShort(s->file,&uData) != UNZ_OK) err=UNZ_ERRNO;
|
||||
|
||||
if (unzlocal_getShort(s->file,&uFlags) != UNZ_OK)
|
||||
err=UNZ_ERRNO;
|
||||
|
||||
if (unzlocal_getShort(s->file,&uData) != UNZ_OK) err=UNZ_ERRNO;
|
||||
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compression_method)) err=UNZ_BADZIPFILE;
|
||||
|
||||
if ((err==UNZ_OK) && (s->cur_file_info.compression_method!=0) && (s->cur_file_info.compression_method!=Z_DEFLATED)) err=UNZ_BADZIPFILE;
|
||||
|
||||
/* date/time */
|
||||
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) err=UNZ_ERRNO;
|
||||
|
||||
/* crc */
|
||||
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) err=UNZ_ERRNO;
|
||||
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) && ((uFlags & 8)==0)) err=UNZ_BADZIPFILE;
|
||||
|
||||
/* size compr */
|
||||
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) err=UNZ_ERRNO;
|
||||
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) && ((uFlags & 8)==0)) err=UNZ_BADZIPFILE;
|
||||
|
||||
/* size uncompr */
|
||||
if (unzlocal_getLong(s->file,&uData) != UNZ_OK) err=UNZ_ERRNO;
|
||||
else if ((err==UNZ_OK) && (uData!=s->cur_file_info.uncompressed_size) && ((uFlags & 8)==0)) err=UNZ_BADZIPFILE;
|
||||
|
||||
|
||||
if (unzlocal_getShort(s->file,&size_filename) != UNZ_OK) err=UNZ_ERRNO;
|
||||
else if ((err==UNZ_OK) && (size_filename!=s->cur_file_info.size_filename)) err=UNZ_BADZIPFILE;
|
||||
|
||||
*piSizeVar += (uInt)size_filename;
|
||||
|
||||
if (unzlocal_getShort(s->file,&size_extra_field) != UNZ_OK) err=UNZ_ERRNO;
|
||||
*poffset_local_extrafield= s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + size_filename;
|
||||
*psize_local_extrafield = (uInt)size_extra_field;
|
||||
|
||||
*piSizeVar += (uInt)size_extra_field;
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
/*
|
||||
Open for reading data the current file in the zipfile.
|
||||
If there is no error and the file is opened, the return value is UNZ_OK.
|
||||
*/
|
||||
extern int ZEXPORT unzOpenCurrentFile (unzFile file) {
|
||||
int err=UNZ_OK;
|
||||
int Store;
|
||||
uInt iSizeVar;
|
||||
unz_s* s;
|
||||
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
uLong offset_local_extrafield; /* offset of the local extra field */
|
||||
uInt size_local_extrafield; /* size of the local extra field */
|
||||
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
if (!s->current_file_ok) return UNZ_PARAMERROR;
|
||||
|
||||
if (s->pfile_in_zip_read) unzCloseCurrentFile(file);
|
||||
|
||||
if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar, &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK) return UNZ_BADZIPFILE;
|
||||
|
||||
pfile_in_zip_read_info = (file_in_zip_read_info_s*)ALLOC(sizeof(file_in_zip_read_info_s));
|
||||
if (!pfile_in_zip_read_info) return UNZ_INTERNALERROR;
|
||||
|
||||
pfile_in_zip_read_info->read_buffer=(char*)ALLOC(UNZ_BUFSIZE);
|
||||
pfile_in_zip_read_info->offset_local_extrafield = offset_local_extrafield;
|
||||
pfile_in_zip_read_info->size_local_extrafield = size_local_extrafield;
|
||||
pfile_in_zip_read_info->pos_local_extrafield=0;
|
||||
|
||||
if (!pfile_in_zip_read_info->read_buffer) {
|
||||
TRYFREE(pfile_in_zip_read_info);
|
||||
return UNZ_INTERNALERROR;
|
||||
}
|
||||
|
||||
pfile_in_zip_read_info->stream_initialised=0;
|
||||
|
||||
if ((s->cur_file_info.compression_method!=0) && (s->cur_file_info.compression_method!=Z_DEFLATED)) err=UNZ_BADZIPFILE;
|
||||
Store = s->cur_file_info.compression_method==0;
|
||||
|
||||
pfile_in_zip_read_info->crc32_wait=s->cur_file_info.crc;
|
||||
pfile_in_zip_read_info->crc32=0;
|
||||
pfile_in_zip_read_info->compression_method = s->cur_file_info.compression_method;
|
||||
pfile_in_zip_read_info->file=s->file;
|
||||
pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile;
|
||||
|
||||
pfile_in_zip_read_info->stream.total_out = 0;
|
||||
|
||||
if (!Store) {
|
||||
pfile_in_zip_read_info->stream.zalloc = (alloc_func)0;
|
||||
pfile_in_zip_read_info->stream.zfree = (free_func)0;
|
||||
pfile_in_zip_read_info->stream.opaque = (voidpf)0;
|
||||
|
||||
err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS);
|
||||
if (err == Z_OK) pfile_in_zip_read_info->stream_initialised=1;
|
||||
/* windowBits is passed < 0 to tell that there is no zlib header.
|
||||
* Note that in this case inflate *requires* an extra "dummy" byte
|
||||
* after the compressed stream in order to complete decompression and
|
||||
* return Z_STREAM_END.
|
||||
* In unzip, i don't wait absolutely Z_STREAM_END because I known the
|
||||
* size of both compressed and uncompressed data
|
||||
*/
|
||||
}
|
||||
pfile_in_zip_read_info->rest_read_compressed = s->cur_file_info.compressed_size ;
|
||||
pfile_in_zip_read_info->rest_read_uncompressed = s->cur_file_info.uncompressed_size ;
|
||||
|
||||
|
||||
pfile_in_zip_read_info->pos_in_zipfile = s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + iSizeVar;
|
||||
|
||||
pfile_in_zip_read_info->stream.avail_in = (uInt)0;
|
||||
|
||||
|
||||
s->pfile_in_zip_read = pfile_in_zip_read_info;
|
||||
return UNZ_OK;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
//dmw's addition
|
||||
extern FILE* ZEXPORT unzOpenCurrentFileFile (unzFile file, char *zipwasnamed)
|
||||
{
|
||||
FILE *F;
|
||||
// int Store;
|
||||
uInt iSizeVar;
|
||||
uInt pos;
|
||||
unz_s* s;
|
||||
// file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
uLong offset_local_extrafield; /* offset of the local extra field */
|
||||
uInt size_local_extrafield; /* size of the local extra field */
|
||||
|
||||
if (!file) return NULL;
|
||||
s=(unz_s*)file;
|
||||
if (!s->current_file_ok) return NULL;
|
||||
|
||||
if (s->pfile_in_zip_read) unzCloseCurrentFile(file);
|
||||
|
||||
if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar, &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK) return NULL;
|
||||
|
||||
|
||||
|
||||
if (s->cur_file_info.compression_method!=0) return NULL;
|
||||
|
||||
//opens a file into the uncompressed steam.
|
||||
pos = s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + iSizeVar;
|
||||
|
||||
F = fopen (zipwasnamed, "rb");
|
||||
|
||||
if (!F)
|
||||
Sys_Error ("Couldn't reopen %s", zipwasnamed);
|
||||
fseek (F, pos, SEEK_SET);
|
||||
return F;
|
||||
}
|
||||
|
||||
extern int ZEXPORT unzGetCurrentFileUncompressedPos (unzFile file) {
|
||||
// int err=UNZ_OK;
|
||||
// int Store;
|
||||
uInt iSizeVar;
|
||||
uInt pos;
|
||||
unz_s* s;
|
||||
// file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
uLong offset_local_extrafield; /* offset of the local extra field */
|
||||
uInt size_local_extrafield; /* size of the local extra field */
|
||||
|
||||
if (!file) return -1;
|
||||
s=(unz_s*)file;
|
||||
if (!s->current_file_ok) return -1;
|
||||
|
||||
if (s->pfile_in_zip_read) unzCloseCurrentFile(file);
|
||||
|
||||
if (unzlocal_CheckCurrentFileCoherencyHeader(s,&iSizeVar, &offset_local_extrafield,&size_local_extrafield)!=UNZ_OK) return -1;
|
||||
|
||||
|
||||
|
||||
if (s->cur_file_info.compression_method!=0) return -1;
|
||||
|
||||
//opens a file into the uncompressed steam.
|
||||
pos = s->cur_file_info_internal.offset_curfile + SIZEZIPLOCALHEADER + iSizeVar;
|
||||
|
||||
return pos;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
/*
|
||||
Read bytes from the current file.
|
||||
buf contain buffer where data must be copied
|
||||
len the size of buf.
|
||||
|
||||
return the number of byte copied if somes bytes are copied
|
||||
return 0 if the end of file was reached
|
||||
return <0 with error code if there is an error
|
||||
(UNZ_ERRNO for IO error, or zLib error for uncompress error)
|
||||
*/
|
||||
extern int ZEXPORT unzReadCurrentFile (unzFile file, voidp buf, unsigned len) {
|
||||
int err=UNZ_OK;
|
||||
uInt iRead = 0;
|
||||
unz_s* s;
|
||||
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
||||
|
||||
if (!pfile_in_zip_read_info) return UNZ_PARAMERROR;
|
||||
|
||||
|
||||
if ((!pfile_in_zip_read_info->read_buffer)) return UNZ_END_OF_LIST_OF_FILE;
|
||||
if (!len) return 0;
|
||||
|
||||
pfile_in_zip_read_info->stream.next_out = (Bytef*)buf;
|
||||
|
||||
pfile_in_zip_read_info->stream.avail_out = (uInt)len;
|
||||
|
||||
if (len>pfile_in_zip_read_info->rest_read_uncompressed)
|
||||
pfile_in_zip_read_info->stream.avail_out = (uInt)pfile_in_zip_read_info->rest_read_uncompressed;
|
||||
|
||||
while (pfile_in_zip_read_info->stream.avail_out>0) {
|
||||
if ((pfile_in_zip_read_info->stream.avail_in==0) && (pfile_in_zip_read_info->rest_read_compressed>0)) {
|
||||
uInt uReadThis = UNZ_BUFSIZE;
|
||||
if (pfile_in_zip_read_info->rest_read_compressed<uReadThis) uReadThis = (uInt)pfile_in_zip_read_info->rest_read_compressed;
|
||||
if (!uReadThis) return UNZ_EOF;
|
||||
if (fseek(pfile_in_zip_read_info->file,
|
||||
pfile_in_zip_read_info->pos_in_zipfile +
|
||||
pfile_in_zip_read_info->byte_before_the_zipfile,SEEK_SET)!=0) return UNZ_ERRNO;
|
||||
if (fread(pfile_in_zip_read_info->read_buffer,uReadThis,1,pfile_in_zip_read_info->file)!=1) return UNZ_ERRNO;
|
||||
pfile_in_zip_read_info->pos_in_zipfile += uReadThis;
|
||||
|
||||
pfile_in_zip_read_info->rest_read_compressed-=uReadThis;
|
||||
|
||||
pfile_in_zip_read_info->stream.next_in =
|
||||
(Bytef*)pfile_in_zip_read_info->read_buffer;
|
||||
pfile_in_zip_read_info->stream.avail_in = (uInt)uReadThis;
|
||||
}
|
||||
|
||||
if (pfile_in_zip_read_info->compression_method==0) {
|
||||
uInt uDoCopy,i ;
|
||||
if (pfile_in_zip_read_info->stream.avail_out < pfile_in_zip_read_info->stream.avail_in) uDoCopy = pfile_in_zip_read_info->stream.avail_out ;
|
||||
else uDoCopy = pfile_in_zip_read_info->stream.avail_in ;
|
||||
|
||||
for (i=0;i<uDoCopy;i++)
|
||||
*(pfile_in_zip_read_info->stream.next_out+i) = *(pfile_in_zip_read_info->stream.next_in+i);
|
||||
|
||||
pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32, pfile_in_zip_read_info->stream.next_out, uDoCopy);
|
||||
pfile_in_zip_read_info->rest_read_uncompressed-=uDoCopy;
|
||||
pfile_in_zip_read_info->stream.avail_in -= uDoCopy;
|
||||
pfile_in_zip_read_info->stream.avail_out -= uDoCopy;
|
||||
pfile_in_zip_read_info->stream.next_out += uDoCopy;
|
||||
pfile_in_zip_read_info->stream.next_in += uDoCopy;
|
||||
pfile_in_zip_read_info->stream.total_out += uDoCopy;
|
||||
iRead += uDoCopy;
|
||||
} else {
|
||||
uLong uTotalOutBefore,uTotalOutAfter;
|
||||
const Bytef *bufBefore;
|
||||
uLong uOutThis;
|
||||
int flush=Z_SYNC_FLUSH;
|
||||
|
||||
uTotalOutBefore = pfile_in_zip_read_info->stream.total_out;
|
||||
bufBefore = pfile_in_zip_read_info->stream.next_out;
|
||||
|
||||
err=inflate(&pfile_in_zip_read_info->stream,flush);
|
||||
|
||||
uTotalOutAfter = pfile_in_zip_read_info->stream.total_out;
|
||||
uOutThis = uTotalOutAfter-uTotalOutBefore;
|
||||
|
||||
pfile_in_zip_read_info->crc32 = crc32(pfile_in_zip_read_info->crc32,bufBefore, (uInt)(uOutThis));
|
||||
|
||||
pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis;
|
||||
|
||||
iRead += (uInt)(uTotalOutAfter - uTotalOutBefore);
|
||||
|
||||
if (err==Z_STREAM_END) return (iRead==0) ? UNZ_EOF : iRead;
|
||||
if (err!=Z_OK) break;
|
||||
}
|
||||
}
|
||||
|
||||
if (err==Z_OK) return iRead;
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Give the current position in uncompressed data
|
||||
*/
|
||||
extern z_off_t ZEXPORT unztell (unzFile file) {
|
||||
unz_s* s;
|
||||
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
||||
|
||||
if (!pfile_in_zip_read_info) return UNZ_PARAMERROR;
|
||||
|
||||
return (z_off_t)pfile_in_zip_read_info->stream.total_out;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
return 1 if the end of file was reached, 0 elsewhere
|
||||
*/
|
||||
extern int ZEXPORT unzeof (unzFile file) {
|
||||
unz_s* s;
|
||||
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
||||
|
||||
if (!pfile_in_zip_read_info) return UNZ_PARAMERROR;
|
||||
|
||||
if (pfile_in_zip_read_info->rest_read_uncompressed == 0) return 1;
|
||||
else return 0;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/*
|
||||
Read extra field from the current file (opened by unzOpenCurrentFile)
|
||||
This is the local-header version of the extra field (sometimes, there is
|
||||
more info in the local-header version than in the central-header)
|
||||
|
||||
if buf==NULL, it return the size of the local extra field that can be read
|
||||
|
||||
if buf!=NULL, len is the size of the buffer, the extra header is copied in
|
||||
buf.
|
||||
the return value is the number of bytes copied in buf, or (if <0)
|
||||
the error code
|
||||
*/
|
||||
extern int ZEXPORT unzGetLocalExtrafield (unzFile file,voidp buf,unsigned len) {
|
||||
unz_s* s;
|
||||
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
uInt read_now;
|
||||
uLong size_to_read;
|
||||
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
||||
|
||||
if (!pfile_in_zip_read_info) return UNZ_PARAMERROR;
|
||||
|
||||
size_to_read = (pfile_in_zip_read_info->size_local_extrafield - pfile_in_zip_read_info->pos_local_extrafield);
|
||||
|
||||
if (!buf) return (int)size_to_read;
|
||||
|
||||
if (len>size_to_read) read_now = (uInt)size_to_read;
|
||||
else read_now = (uInt)len ;
|
||||
|
||||
if (!read_now) return 0;
|
||||
|
||||
if (fseek(pfile_in_zip_read_info->file,
|
||||
pfile_in_zip_read_info->offset_local_extrafield +
|
||||
pfile_in_zip_read_info->pos_local_extrafield,SEEK_SET)!=0) return UNZ_ERRNO;
|
||||
|
||||
if (fread(buf,(uInt)size_to_read,1,pfile_in_zip_read_info->file)!=1) return UNZ_ERRNO;
|
||||
|
||||
return (int)read_now;
|
||||
}
|
||||
|
||||
/*
|
||||
Close the file in zip opened with unzipOpenCurrentFile
|
||||
Return UNZ_CRCERROR if all the file was read but the CRC is not good
|
||||
*/
|
||||
extern int ZEXPORT unzCloseCurrentFile (unzFile file) {
|
||||
int err=UNZ_OK;
|
||||
|
||||
unz_s* s;
|
||||
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
pfile_in_zip_read_info=s->pfile_in_zip_read;
|
||||
|
||||
if (!pfile_in_zip_read_info) return UNZ_PARAMERROR;
|
||||
|
||||
|
||||
if (!pfile_in_zip_read_info->rest_read_uncompressed) {
|
||||
if (pfile_in_zip_read_info->crc32 != pfile_in_zip_read_info->crc32_wait) err=UNZ_CRCERROR;
|
||||
}
|
||||
|
||||
|
||||
TRYFREE(pfile_in_zip_read_info->read_buffer);
|
||||
pfile_in_zip_read_info->read_buffer = NULL;
|
||||
if (pfile_in_zip_read_info->stream_initialised) inflateEnd(&pfile_in_zip_read_info->stream);
|
||||
|
||||
pfile_in_zip_read_info->stream_initialised = 0;
|
||||
TRYFREE(pfile_in_zip_read_info);
|
||||
|
||||
s->pfile_in_zip_read=NULL;
|
||||
|
||||
return err;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
Get the global comment string of the ZipFile, in the szComment buffer.
|
||||
uSizeBuf is the size of the szComment buffer.
|
||||
return the number of byte copied or an error code <0
|
||||
*/
|
||||
extern int ZEXPORT unzGetGlobalComment (unzFile file, char *szComment, uLong uSizeBuf) {
|
||||
// int err=UNZ_OK;
|
||||
unz_s* s;
|
||||
uLong uReadThis ;
|
||||
if (!file) return UNZ_PARAMERROR;
|
||||
s=(unz_s*)file;
|
||||
|
||||
uReadThis = uSizeBuf;
|
||||
if (uReadThis>s->gi.size_comment) uReadThis = s->gi.size_comment;
|
||||
|
||||
if (fseek(s->file,s->central_pos+22,SEEK_SET)!=0) return UNZ_ERRNO;
|
||||
|
||||
if (uReadThis>0) {
|
||||
*szComment='\0';
|
||||
if (fread(szComment,(uInt)uReadThis,1,s->file)!=1) return UNZ_ERRNO;
|
||||
}
|
||||
|
||||
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment)) *(szComment+s->gi.size_comment)='\0';
|
||||
return (int)uReadThis;
|
||||
}
|
||||
|
|
@ -0,0 +1,279 @@
|
|||
/* unzip.h -- IO for uncompress .zip files using zlib
|
||||
Version 0.15 beta, Mar 19th, 1998,
|
||||
|
||||
Copyright (C) 1998 Gilles Vollant
|
||||
|
||||
This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
|
||||
WinZip, InfoZip tools and compatible.
|
||||
Encryption and multi volume ZipFile (span) are not supported.
|
||||
Old compressions used by old PKZip 1.x are not supported
|
||||
|
||||
THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
|
||||
CAN CHANGE IN FUTURE VERSION !!
|
||||
I WAIT FEEDBACK at mail info@winimage.com
|
||||
Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
|
||||
|
||||
Condition of use and distribution are the same than zlib :
|
||||
|
||||
This software is provided 'as-is', without any express or implied
|
||||
warranty. In no event will the authors be held liable for any damages
|
||||
arising from the use of this software.
|
||||
|
||||
Permission is granted to anyone to use this software for any purpose,
|
||||
including commercial applications, and to alter it and redistribute it
|
||||
freely, subject to the following restrictions:
|
||||
|
||||
1. The origin of this software must not be misrepresented; you must not
|
||||
claim that you wrote the original software. If you use this software
|
||||
in a product, an acknowledgment in the product documentation would be
|
||||
appreciated but is not required.
|
||||
2. Altered source versions must be plainly marked as such, and must not be
|
||||
misrepresented as being the original software.
|
||||
3. This notice may not be removed or altered from any source distribution.
|
||||
|
||||
|
||||
*/
|
||||
/* for more info about .ZIP format, see
|
||||
ftp://ftp.cdrom.com/pub/infozip/doc/appnote-970311-iz.zip
|
||||
PkWare has also a specification at :
|
||||
ftp://ftp.pkware.com/probdesc.zip */
|
||||
|
||||
#ifndef _unz_H
|
||||
#define _unz_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif
|
||||
|
||||
#ifndef _ZLIB_H
|
||||
#include "zlib.h"
|
||||
#endif
|
||||
|
||||
#if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
|
||||
/* like the STRICT of WIN32, we define a pointer that cannot be converted
|
||||
from (void*) without cast */
|
||||
typedef struct TagunzFile__ { int unused; } unzFile__;
|
||||
typedef unzFile__ *unzFile;
|
||||
#else
|
||||
typedef voidp unzFile;
|
||||
#endif
|
||||
|
||||
|
||||
#define UNZ_OK (0)
|
||||
#define UNZ_END_OF_LIST_OF_FILE (-100)
|
||||
#define UNZ_ERRNO (Z_ERRNO)
|
||||
#define UNZ_EOF (0)
|
||||
#define UNZ_PARAMERROR (-102)
|
||||
#define UNZ_BADZIPFILE (-103)
|
||||
#define UNZ_INTERNALERROR (-104)
|
||||
#define UNZ_CRCERROR (-105)
|
||||
|
||||
/* tm_unz contain date/time info */
|
||||
//typedef struct tm_unz_s
|
||||
//{
|
||||
// uInt tm_sec; /* seconds after the minute - [0,59] */
|
||||
// uInt tm_min; /* minutes after the hour - [0,59] */
|
||||
// uInt tm_hour; /* hours since midnight - [0,23] */
|
||||
// uInt tm_mday; /* day of the month - [1,31] */
|
||||
// uInt tm_mon; /* months since January - [0,11] */
|
||||
// uInt tm_year; /* years - [1980..2044] */
|
||||
//} tm_unz;
|
||||
|
||||
/* unz_global_info structure contain global data about the ZIPfile
|
||||
These data comes from the end of central dir */
|
||||
typedef struct unz_global_info_s
|
||||
{
|
||||
uLong number_entry; /* total number of entries in
|
||||
the central dir on this disk */
|
||||
uLong size_comment; /* size of the global comment of the zipfile */
|
||||
} unz_global_info;
|
||||
|
||||
|
||||
/* unz_file_info contain information about a file in the zipfile */
|
||||
#pragma pack(push, 1)
|
||||
typedef struct unz_file_info_s
|
||||
{
|
||||
uShort version; /* version made by 2 bytes */
|
||||
uShort version_needed; /* version needed to extract 2 bytes */
|
||||
uShort flag; /* general purpose bit flag 2 bytes */
|
||||
uShort compression_method; /* compression method 2 bytes */
|
||||
uLong dosDate; /* last mod file date in Dos fmt 4 bytes */
|
||||
uLong crc; /* crc-32 4 bytes */
|
||||
uLong compressed_size; /* compressed size 4 bytes */
|
||||
uLong uncompressed_size; /* uncompressed size 4 bytes */
|
||||
uShort size_filename; /* filename length 2 bytes */
|
||||
uShort size_file_extra; /* extra field length 2 bytes */
|
||||
uShort size_file_comment; /* file comment length 2 bytes */
|
||||
|
||||
uShort disk_num_start; /* disk number start 2 bytes */
|
||||
uShort internal_fa; /* internal file attributes 2 bytes */
|
||||
uLong external_fa; /* external file attributes 4 bytes */
|
||||
|
||||
// tm_unz tmu_date;
|
||||
uLong offset, c_offset;
|
||||
} unz_file_info;
|
||||
#pragma pack(pop)
|
||||
extern int ZEXPORT unzStringFileNameCompare OF ((const char* fileName1,
|
||||
const char* fileName2,
|
||||
int iCaseSensitivity));
|
||||
/*
|
||||
Compare two filename (fileName1,fileName2).
|
||||
If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
|
||||
If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
|
||||
or strcasecmp)
|
||||
If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
|
||||
(like 1 on Unix, 2 on Windows)
|
||||
*/
|
||||
|
||||
|
||||
extern unzFile ZEXPORT unzOpen OF((const char *path));
|
||||
/*
|
||||
Open a Zip file. path contain the full pathname (by example,
|
||||
on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
|
||||
"zlib/zlib111.zip".
|
||||
If the zipfile cannot be opened (file don't exist or in not valid), the
|
||||
return value is NULL.
|
||||
Else, the return value is a unzFile Handle, usable with other function
|
||||
of this unzip package.
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzClose OF((unzFile file));
|
||||
/*
|
||||
Close a ZipFile opened with unzipOpen.
|
||||
If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
|
||||
these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
|
||||
return UNZ_OK if there is no problem. */
|
||||
|
||||
extern int ZEXPORT unzGetGlobalInfo OF((unzFile file,
|
||||
unz_global_info *pglobal_info));
|
||||
/*
|
||||
Write info about the ZipFile in the *pglobal_info structure.
|
||||
No preparation of the structure is needed
|
||||
return UNZ_OK if there is no problem. */
|
||||
|
||||
|
||||
extern int ZEXPORT unzGetGlobalComment OF((unzFile file,
|
||||
char *szComment,
|
||||
uLong uSizeBuf));
|
||||
/*
|
||||
Get the global comment string of the ZipFile, in the szComment buffer.
|
||||
uSizeBuf is the size of the szComment buffer.
|
||||
return the number of byte copied or an error code <0
|
||||
*/
|
||||
|
||||
|
||||
/***************************************************************************/
|
||||
/* Unzip package allow you browse the directory of the zipfile */
|
||||
|
||||
extern int ZEXPORT unzGoToFirstFile OF((unzFile file));
|
||||
/*
|
||||
Set the current file of the zipfile to the first file.
|
||||
return UNZ_OK if there is no problem
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzGoToNextFile OF((unzFile file));
|
||||
/*
|
||||
Set the current file of the zipfile to the next file.
|
||||
return UNZ_OK if there is no problem
|
||||
return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzLocateFile OF((unzFile file,
|
||||
const char *szFileName,
|
||||
int iCaseSensitivity));
|
||||
|
||||
extern int ZEXPORT unzLocateFileMy OF((unzFile file, uLong num, uLong pos));
|
||||
/*
|
||||
Try locate the file szFileName in the zipfile.
|
||||
For the iCaseSensitivity signification, see unzStringFileNameCompare
|
||||
|
||||
return value :
|
||||
UNZ_OK if the file is found. It becomes the current file.
|
||||
UNZ_END_OF_LIST_OF_FILE if the file is not found
|
||||
*/
|
||||
|
||||
|
||||
extern int ZEXPORT unzGetCurrentFileInfo OF((unzFile file,
|
||||
unz_file_info *pfile_info,
|
||||
char *szFileName,
|
||||
uLong fileNameBufferSize,
|
||||
void *extraField,
|
||||
uLong extraFieldBufferSize,
|
||||
char *szComment,
|
||||
uLong commentBufferSize));
|
||||
/*
|
||||
Get Info about the current file
|
||||
if pfile_info!=NULL, the *pfile_info structure will contain somes info about
|
||||
the current file
|
||||
if szFileName!=NULL, the filemane string will be copied in szFileName
|
||||
(fileNameBufferSize is the size of the buffer)
|
||||
if extraField!=NULL, the extra field information will be copied in extraField
|
||||
(extraFieldBufferSize is the size of the buffer).
|
||||
This is the Central-header version of the extra field
|
||||
if szComment!=NULL, the comment string of the file will be copied in szComment
|
||||
(commentBufferSize is the size of the buffer)
|
||||
*/
|
||||
|
||||
/***************************************************************************/
|
||||
/* for reading the content of the current zipfile, you can open it, read data
|
||||
from it, and close it (you can close it before reading all the file)
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzOpenCurrentFile OF((unzFile file));
|
||||
/*
|
||||
Open for reading data the current file in the zipfile.
|
||||
If there is no error, the return value is UNZ_OK.
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzCloseCurrentFile OF((unzFile file));
|
||||
/*
|
||||
Close the file in zip opened with unzOpenCurrentFile
|
||||
Return UNZ_CRCERROR if all the file was read but the CRC is not good
|
||||
*/
|
||||
|
||||
|
||||
extern int ZEXPORT unzReadCurrentFile OF((unzFile file,
|
||||
voidp buf,
|
||||
unsigned len));
|
||||
/*
|
||||
Read bytes from the current file (opened by unzOpenCurrentFile)
|
||||
buf contain buffer where data must be copied
|
||||
len the size of buf.
|
||||
|
||||
return the number of byte copied if somes bytes are copied
|
||||
return 0 if the end of file was reached
|
||||
return <0 with error code if there is an error
|
||||
(UNZ_ERRNO for IO error, or zLib error for uncompress error)
|
||||
*/
|
||||
|
||||
extern z_off_t ZEXPORT unztell OF((unzFile file));
|
||||
/*
|
||||
Give the current position in uncompressed data
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzeof OF((unzFile file));
|
||||
/*
|
||||
return 1 if the end of file was reached, 0 elsewhere
|
||||
*/
|
||||
|
||||
extern int ZEXPORT unzGetLocalExtrafield OF((unzFile file,
|
||||
voidp buf,
|
||||
unsigned len));
|
||||
/*
|
||||
Read extra field from the current file (opened by unzOpenCurrentFile)
|
||||
This is the local-header version of the extra field (sometimes, there is
|
||||
more info in the local-header version than in the central-header)
|
||||
|
||||
if buf==NULL, it return the size of the local extra field
|
||||
|
||||
if buf!=NULL, len is the size of the buffer, the extra header is copied in
|
||||
buf.
|
||||
the return value is the number of bytes copied in buf, or (if <0)
|
||||
the error code
|
||||
*/
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif
|
||||
|
||||
#endif /* _unz_H */
|
||||
Loading…
Reference in New Issue