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20ef474862
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@1895 fc73d0e0-1445-4013-8a0c-d673dee63da5
950 lines
30 KiB
C
950 lines
30 KiB
C
/* 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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#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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unsigned long 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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unsigned long pos_in_zipfile; /* position in byte on the zipfile, for fseek*/
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unsigned long stream_initialised; /* flag set if stream structure is initialised*/
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unsigned long offset_local_extrafield;/* offset of the local extra field */
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unsigned int size_local_extrafield;/* size of the local extra field */
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unsigned long pos_local_extrafield; /* position in the local extra field in read*/
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unsigned long crc32; /* crc32 of all data uncompressed */
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unsigned long crc32_wait; /* crc32 we must obtain after decompress all */
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unsigned long rest_read_compressed; /* number of byte to be decompressed */
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unsigned long rest_read_uncompressed;/*number of byte to be obtained after decomp*/
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vfsfile_t* file; /* io structore of the zipfile */
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unsigned long compression_method; /* compression method (0==store) */
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unsigned long 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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vfsfile_t* file; /* io structore of the zipfile */
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unz_global_info gi; /* public global information */
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unsigned long byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/
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unsigned long num_file; /* number of the current file in the zipfile*/
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unsigned long pos_in_central_dir; /* pos of the current file in the central dir*/
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unsigned long current_file_ok; /* flag about the usability of the current file*/
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unsigned long central_pos; /* position of the beginning of the central dir*/
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unsigned long size_central_dir; /* size of the central directory */
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unsigned long 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(vfsfile_t *fin,unsigned long *pi) {
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unsigned short c;
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int err = VFS_READ(fin, &c, 2);
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if (err==2) {
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*pi = LittleShort(c);
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return UNZ_OK;
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} else {
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if (VFS_TELL(fin) != VFS_GETLEN(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(vfsfile_t *fin,unsigned long *pi) {
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unsigned long c;
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int err = VFS_READ(fin, &c, 4);
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if (err==4) {
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*pi = LittleLong(c);
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return UNZ_OK;
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} else {
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if (VFS_TELL(fin) != VFS_GETLEN(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 unsigned long unzlocal_SearchCentralDir(vfsfile_t *fin) {
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unsigned char* buf;
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unsigned long uSizeFile;
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unsigned long uBackRead;
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unsigned long uMaxBack=0xffff; /* maximum size of global comment */
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unsigned long uPosFound=0;
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uSizeFile = VFS_GETLEN(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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unsigned long 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 (!VFS_SEEK(fin, uReadPos))
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break;
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if (VFS_READ(fin,buf,(unsigned int)uReadSize)!=uReadSize) 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 (vfsfile_t *fin) {
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unz_s us = {0};
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unz_s *s;
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unsigned long central_pos,uL;
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unsigned long number_disk = 0; /* number of the current dist, used for
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spaning ZIP, unsupported, always 0*/
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unsigned long number_disk_with_CD = 0; /* number the the disk with central dir, used
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for spaning ZIP, unsupported, always 0*/
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unsigned long number_entry_CD = 0; /* 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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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 (!VFS_SEEK(fin,central_pos)) 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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VFS_CLOSE(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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VFS_CLOSE(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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unsigned long fileNameBufferSize,
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void *extraField,
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unsigned long extraFieldBufferSize,
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char *szComment,
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unsigned long 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, unsigned long fileNameBufferSize,
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void *extraField, unsigned long extraFieldBufferSize,
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char *szComment, unsigned long 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 = {0};
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int err=UNZ_OK;
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unsigned long uMagic = 0;
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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 (!VFS_SEEK(s->file,s->pos_in_central_dir+s->byte_before_the_zipfile)) 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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VFS_READ(s->file, &file_info, sizeof(file_info)-2*4); // 2*4 is the size of 2 my vars
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file_info.version = LittleShort(file_info.version);
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file_info.version_needed = LittleShort(file_info.version_needed);
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file_info.flag = LittleShort(file_info.flag);
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file_info.compression_method = LittleShort(file_info.compression_method);
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file_info.dosDate = LittleLong(file_info.dosDate);
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file_info.crc = LittleLong(file_info.crc);
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file_info.compressed_size = LittleLong(file_info.compressed_size);
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file_info.uncompressed_size = LittleLong(file_info.uncompressed_size);
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file_info.size_filename = LittleShort(file_info.size_filename);
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file_info.size_file_extra = LittleShort(file_info.size_file_extra);
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file_info.size_file_comment = LittleShort(file_info.size_file_comment);
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file_info.disk_num_start = LittleShort(file_info.disk_num_start);
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file_info.internal_fa = LittleShort(file_info.internal_fa);
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file_info.external_fa = LittleLong(file_info.external_fa);
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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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unsigned long 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 (VFS_READ(s->file, szFileName,(unsigned int)uSizeRead)!=uSizeRead) 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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unsigned long 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 (VFS_SEEK(s->file, VFS_TELL(s->file)+lSeek)) 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 (VFS_READ(s->file, extraField,(unsigned int)uSizeRead)!=uSizeRead) 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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unsigned long 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 (VFS_SEEK(s->file, VFS_TELL(s->file)+lSeek)) 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 (VFS_READ(s->file, szComment,(unsigned int)uSizeRead)!=uSizeRead) 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, unsigned long fileNameBufferSize,
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void *extraField, unsigned long extraFieldBufferSize,
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char *szComment, unsigned long 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,
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NULL,0,NULL,0,NULL,0);
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s->current_file_ok = (err == UNZ_OK);
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return err;
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}
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/*
|
|
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, unsigned long num, unsigned long 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, unsigned int *piSizeVar,
|
|
unsigned long *poffset_local_extrafield,
|
|
unsigned int *psize_local_extrafield) {
|
|
unsigned long uMagic = 0,uData = 0,uFlags = 0;
|
|
unsigned long size_filename = 0;
|
|
unsigned long size_extra_field = 0;
|
|
int err=UNZ_OK;
|
|
|
|
*piSizeVar = 0;
|
|
*poffset_local_extrafield = 0;
|
|
*psize_local_extrafield = 0;
|
|
|
|
if (!VFS_SEEK(s->file,s->cur_file_info_internal.offset_curfile + s->byte_before_the_zipfile)) 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 += (unsigned int)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 = (unsigned int)size_extra_field;
|
|
|
|
*piSizeVar += (unsigned int)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;
|
|
unsigned int iSizeVar;
|
|
unz_s* s;
|
|
file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
unsigned long offset_local_extrafield; /* offset of the local extra field */
|
|
unsigned int 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 = (unsigned int)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;
|
|
unsigned int iSizeVar;
|
|
unsigned int pos;
|
|
unz_s* s;
|
|
// file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
unsigned long offset_local_extrafield; /* offset of the local extra field */
|
|
unsigned int 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;
|
|
unsigned int iSizeVar;
|
|
unsigned int pos;
|
|
unz_s* s;
|
|
// file_in_zip_read_info_s* pfile_in_zip_read_info;
|
|
unsigned long offset_local_extrafield; /* offset of the local extra field */
|
|
unsigned int 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;
|
|
unsigned int 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 = (unsigned int)len;
|
|
|
|
if (len>pfile_in_zip_read_info->rest_read_uncompressed)
|
|
pfile_in_zip_read_info->stream.avail_out = (unsigned int)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)) {
|
|
unsigned int uReadThis = UNZ_BUFSIZE;
|
|
if (pfile_in_zip_read_info->rest_read_compressed<uReadThis) uReadThis = (unsigned int)pfile_in_zip_read_info->rest_read_compressed;
|
|
if (!uReadThis) return UNZ_EOF;
|
|
if (!VFS_SEEK(pfile_in_zip_read_info->file,
|
|
pfile_in_zip_read_info->pos_in_zipfile +
|
|
pfile_in_zip_read_info->byte_before_the_zipfile)) return UNZ_ERRNO;
|
|
if (VFS_READ(pfile_in_zip_read_info->file, pfile_in_zip_read_info->read_buffer,uReadThis)!=uReadThis) 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 = (unsigned int)uReadThis;
|
|
}
|
|
|
|
if (pfile_in_zip_read_info->compression_method==0) {
|
|
unsigned int 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 {
|
|
unsigned long uTotalOutBefore,uTotalOutAfter;
|
|
const Bytef *bufBefore;
|
|
unsigned long 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, (unsigned int)(uOutThis));
|
|
|
|
pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis;
|
|
|
|
iRead += (unsigned int)(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;
|
|
unsigned int read_now;
|
|
unsigned long 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 = (unsigned int)size_to_read;
|
|
else read_now = (unsigned int)len ;
|
|
|
|
if (!read_now) return 0;
|
|
|
|
if (!VFS_SEEK(pfile_in_zip_read_info->file,
|
|
pfile_in_zip_read_info->offset_local_extrafield +
|
|
pfile_in_zip_read_info->pos_local_extrafield)) return UNZ_ERRNO;
|
|
|
|
if (VFS_READ(pfile_in_zip_read_info->file, buf,(unsigned int)size_to_read)!=size_to_read) 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, unsigned long uSizeBuf) {
|
|
// int err=UNZ_OK;
|
|
unz_s* s;
|
|
unsigned long uReadThis ;
|
|
if (!file) return UNZ_PARAMERROR;
|
|
s=(unz_s*)file;
|
|
|
|
uReadThis = uSizeBuf;
|
|
if (uReadThis>s->gi.size_comment) uReadThis = s->gi.size_comment;
|
|
|
|
if (!VFS_SEEK(s->file,s->central_pos+22)) return UNZ_ERRNO;
|
|
|
|
if (uReadThis>0) {
|
|
*szComment='\0';
|
|
if (VFS_READ(s->file, szComment,(unsigned int)uReadThis)!=uReadThis) return UNZ_ERRNO;
|
|
}
|
|
|
|
if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment)) *(szComment+s->gi.size_comment)='\0';
|
|
return (int)uReadThis;
|
|
}
|