| /* unzip.c -- IO for uncompress .zip files using zlib |
| Version 1.00, September 10th, 2003 |
| |
| Copyright (C) 1998-2003 Gilles Vollant |
| |
| Read unzip.h for more info |
| */ |
| |
| /* Decryption code comes from crypt.c by Info-ZIP but has been greatly reduced in terms of |
| compatibility with older software. The following is from the original crypt.c. Code |
| woven in by Terry Thorsen 1/2003. |
| */ |
| /* |
| Copyright (c) 1990-2000 Info-ZIP. All rights reserved. |
| |
| See the accompanying file LICENSE, version 2000-Apr-09 or later |
| (the contents of which are also included in zip.h) for terms of use. |
| If, for some reason, all these files are missing, the Info-ZIP license |
| also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html |
| */ |
| /* |
| crypt.c (full version) by Info-ZIP. Last revised: [see crypt.h] |
| |
| The encryption/decryption parts of this source code (as opposed to the |
| non-echoing password parts) were originally written in Europe. The |
| whole source package can be freely distributed, including from the USA. |
| (Prior to January 2000, re-export from the US was a violation of US law.) |
| */ |
| |
| /* |
| This encryption code is a direct transcription of the algorithm from |
| Roger Schlafly, described by Phil Katz in the file appnote.txt. This |
| file (appnote.txt) is distributed with the PKZIP program (even in the |
| version without encryption capabilities). |
| */ |
| |
| |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include "zlib.h" |
| #include "unzip.h" |
| |
| #ifdef STDC |
| # include <stddef.h> |
| # include <string.h> |
| # include <stdlib.h> |
| #endif |
| #ifdef NO_ERRNO_H |
| extern int errno; |
| #else |
| # include <errno.h> |
| #endif |
| |
| |
| #ifndef local |
| # define local static |
| #endif |
| /* compile with -Dlocal if your debugger can't find static symbols */ |
| |
| |
| #ifndef CASESENSITIVITYDEFAULT_NO |
| # if !defined(unix) && !defined(CASESENSITIVITYDEFAULT_YES) |
| # define CASESENSITIVITYDEFAULT_NO |
| # endif |
| #endif |
| |
| |
| #ifndef UNZ_BUFSIZE |
| #define UNZ_BUFSIZE (16384) |
| #endif |
| |
| #ifndef UNZ_MAXFILENAMEINZIP |
| #define UNZ_MAXFILENAMEINZIP (256) |
| #endif |
| |
| #ifndef ALLOC |
| # define ALLOC(size) (malloc(size)) |
| #endif |
| #ifndef TRYFREE |
| # define TRYFREE(p) {if (p) free(p);} |
| #endif |
| |
| #define SIZECENTRALDIRITEM (0x2e) |
| #define SIZEZIPLOCALHEADER (0x1e) |
| |
| |
| |
| |
| const char unz_copyright[] = |
| " unzip 1.00 Copyright 1998-2003 Gilles Vollant - http://www.winimage.com/zLibDll"; |
| |
| /* unz_file_info_interntal contain internal info about a file in zipfile*/ |
| typedef struct unz_file_info_internal_s |
| { |
| uLong offset_curfile;/* relative offset of local header 4 bytes */ |
| } unz_file_info_internal; |
| |
| |
| /* file_in_zip_read_info_s contain internal information about a file in zipfile, |
| when reading and decompress it */ |
| typedef struct |
| { |
| char *read_buffer; /* internal buffer for compressed data */ |
| z_stream stream; /* zLib stream structure for inflate */ |
| |
| uLong pos_in_zipfile; /* position in byte on the zipfile, for fseek*/ |
| uLong stream_initialised; /* flag set if stream structure is initialised*/ |
| |
| uLong offset_local_extrafield;/* offset of the local extra field */ |
| uInt size_local_extrafield;/* size of the local extra field */ |
| uLong pos_local_extrafield; /* position in the local extra field in read*/ |
| |
| uLong crc32; /* crc32 of all data uncompressed */ |
| uLong crc32_wait; /* crc32 we must obtain after decompress all */ |
| uLong rest_read_compressed; /* number of byte to be decompressed */ |
| uLong rest_read_uncompressed;/*number of byte to be obtained after decomp*/ |
| zlib_filefunc_def z_filefunc; |
| voidpf filestream; /* io structore of the zipfile */ |
| uLong compression_method; /* compression method (0==store) */ |
| uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/ |
| int raw; |
| } file_in_zip_read_info_s; |
| |
| |
| /* unz_s contain internal information about the zipfile |
| */ |
| typedef struct |
| { |
| zlib_filefunc_def z_filefunc; |
| voidpf filestream; /* io structore of the zipfile */ |
| unz_global_info gi; /* public global information */ |
| uLong byte_before_the_zipfile;/* byte before the zipfile, (>0 for sfx)*/ |
| uLong num_file; /* number of the current file in the zipfile*/ |
| uLong pos_in_central_dir; /* pos of the current file in the central dir*/ |
| uLong current_file_ok; /* flag about the usability of the current file*/ |
| uLong central_pos; /* position of the beginning of the central dir*/ |
| |
| uLong size_central_dir; /* size of the central directory */ |
| uLong offset_central_dir; /* offset of start of central directory with |
| respect to the starting disk number */ |
| |
| unz_file_info cur_file_info; /* public info about the current file in zip*/ |
| unz_file_info_internal cur_file_info_internal; /* private info about it*/ |
| file_in_zip_read_info_s* pfile_in_zip_read; /* structure about the current |
| file if we are decompressing it */ |
| int encrypted; |
| # ifndef NOUNCRYPT |
| unsigned long keys[3]; /* keys defining the pseudo-random sequence */ |
| const unsigned long* pcrc_32_tab; |
| # endif |
| } unz_s; |
| |
| |
| #ifndef NOUNCRYPT |
| #include "crypt.h" |
| #endif |
| |
| /* =========================================================================== |
| Read a byte from a gz_stream; update next_in and avail_in. Return EOF |
| for end of file. |
| IN assertion: the stream s has been sucessfully opened for reading. |
| */ |
| |
| |
| local int unzlocal_getByte OF(( |
| const zlib_filefunc_def* pzlib_filefunc_def, |
| voidpf filestream, |
| int *pi)); |
| |
| local int unzlocal_getByte(pzlib_filefunc_def,filestream,pi) |
| const zlib_filefunc_def* pzlib_filefunc_def; |
| voidpf filestream; |
| int *pi; |
| { |
| unsigned char c; |
| int err = (int)ZREAD(*pzlib_filefunc_def,filestream,&c,1); |
| if (err==1) |
| { |
| *pi = (int)c; |
| return UNZ_OK; |
| } |
| else |
| { |
| if (ZERROR(*pzlib_filefunc_def,filestream)) |
| return UNZ_ERRNO; |
| else |
| return UNZ_EOF; |
| } |
| } |
| |
| |
| /* =========================================================================== |
| Reads a long in LSB order from the given gz_stream. Sets |
| */ |
| local int unzlocal_getShort OF(( |
| const zlib_filefunc_def* pzlib_filefunc_def, |
| voidpf filestream, |
| uLong *pX)); |
| |
| local int unzlocal_getShort (pzlib_filefunc_def,filestream,pX) |
| const zlib_filefunc_def* pzlib_filefunc_def; |
| voidpf filestream; |
| uLong *pX; |
| { |
| uLong x ; |
| int i; |
| int err; |
| |
| err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| x = (uLong)i; |
| |
| if (err==UNZ_OK) |
| err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| x += ((uLong)i)<<8; |
| |
| if (err==UNZ_OK) |
| *pX = x; |
| else |
| *pX = 0; |
| return err; |
| } |
| |
| local int unzlocal_getLong OF(( |
| const zlib_filefunc_def* pzlib_filefunc_def, |
| voidpf filestream, |
| uLong *pX)); |
| |
| local int unzlocal_getLong (pzlib_filefunc_def,filestream,pX) |
| const zlib_filefunc_def* pzlib_filefunc_def; |
| voidpf filestream; |
| uLong *pX; |
| { |
| uLong x ; |
| int i; |
| int err; |
| |
| err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| x = (uLong)i; |
| |
| if (err==UNZ_OK) |
| err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| x += ((uLong)i)<<8; |
| |
| if (err==UNZ_OK) |
| err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| x += ((uLong)i)<<16; |
| |
| if (err==UNZ_OK) |
| err = unzlocal_getByte(pzlib_filefunc_def,filestream,&i); |
| x += ((uLong)i)<<24; |
| |
| if (err==UNZ_OK) |
| *pX = x; |
| else |
| *pX = 0; |
| return err; |
| } |
| |
| |
| /* My own strcmpi / strcasecmp */ |
| local int strcmpcasenosensitive_internal (fileName1,fileName2) |
| const char* fileName1; |
| const char* fileName2; |
| { |
| for (;;) |
| { |
| char c1=*(fileName1++); |
| char c2=*(fileName2++); |
| if ((c1>='a') && (c1<='z')) |
| c1 -= 0x20; |
| if ((c2>='a') && (c2<='z')) |
| c2 -= 0x20; |
| if (c1=='\0') |
| return ((c2=='\0') ? 0 : -1); |
| if (c2=='\0') |
| return 1; |
| if (c1<c2) |
| return -1; |
| if (c1>c2) |
| return 1; |
| } |
| } |
| |
| |
| #ifdef CASESENSITIVITYDEFAULT_NO |
| #define CASESENSITIVITYDEFAULTVALUE 2 |
| #else |
| #define CASESENSITIVITYDEFAULTVALUE 1 |
| #endif |
| |
| #ifndef STRCMPCASENOSENTIVEFUNCTION |
| #define STRCMPCASENOSENTIVEFUNCTION strcmpcasenosensitive_internal |
| #endif |
| |
| /* |
| 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 int ZEXPORT unzStringFileNameCompare (fileName1,fileName2,iCaseSensitivity) |
| const char* fileName1; |
| const char* fileName2; |
| int iCaseSensitivity; |
| { |
| if (iCaseSensitivity==0) |
| iCaseSensitivity=CASESENSITIVITYDEFAULTVALUE; |
| |
| if (iCaseSensitivity==1) |
| return strcmp(fileName1,fileName2); |
| |
| return STRCMPCASENOSENTIVEFUNCTION(fileName1,fileName2); |
| } |
| |
| #ifndef BUFREADCOMMENT |
| #define BUFREADCOMMENT (0x400) |
| #endif |
| |
| /* |
| Locate the Central directory of a zipfile (at the end, just before |
| the global comment) |
| */ |
| local uLong unzlocal_SearchCentralDir OF(( |
| const zlib_filefunc_def* pzlib_filefunc_def, |
| voidpf filestream)); |
| |
| local uLong unzlocal_SearchCentralDir(pzlib_filefunc_def,filestream) |
| const zlib_filefunc_def* pzlib_filefunc_def; |
| voidpf filestream; |
| { |
| unsigned char* buf; |
| uLong uSizeFile; |
| uLong uBackRead; |
| uLong uMaxBack=0xffff; /* maximum size of global comment */ |
| uLong uPosFound=0; |
| |
| if (ZSEEK(*pzlib_filefunc_def,filestream,0,ZLIB_FILEFUNC_SEEK_END) != 0) |
| return 0; |
| |
| |
| uSizeFile = ZTELL(*pzlib_filefunc_def,filestream); |
| |
| if (uMaxBack>uSizeFile) |
| uMaxBack = uSizeFile; |
| |
| buf = (unsigned char*)ALLOC(BUFREADCOMMENT+4); |
| if (buf==NULL) |
| return 0; |
| |
| uBackRead = 4; |
| while (uBackRead<uMaxBack) |
| { |
| uLong uReadSize,uReadPos ; |
| int i; |
| if (uBackRead+BUFREADCOMMENT>uMaxBack) |
| uBackRead = uMaxBack; |
| else |
| uBackRead+=BUFREADCOMMENT; |
| uReadPos = uSizeFile-uBackRead ; |
| |
| uReadSize = ((BUFREADCOMMENT+4) < (uSizeFile-uReadPos)) ? |
| (BUFREADCOMMENT+4) : (uSizeFile-uReadPos); |
| if (ZSEEK(*pzlib_filefunc_def,filestream,uReadPos,ZLIB_FILEFUNC_SEEK_SET)!=0) |
| break; |
| |
| if (ZREAD(*pzlib_filefunc_def,filestream,buf,uReadSize)!=uReadSize) |
| break; |
| |
| for (i=(int)uReadSize-3; (i--)>0;) |
| if (((*(buf+i))==0x50) && ((*(buf+i+1))==0x4b) && |
| ((*(buf+i+2))==0x05) && ((*(buf+i+3))==0x06)) |
| { |
| uPosFound = uReadPos+i; |
| break; |
| } |
| |
| if (uPosFound!=0) |
| break; |
| } |
| TRYFREE(buf); |
| return uPosFound; |
| } |
| |
| /* |
| Open a Zip file. path contain the full pathname (by example, |
| on a Windows NT computer "c:\\test\\zlib114.zip" or on an Unix computer |
| "zlib/zlib114.zip". |
| If the zipfile cannot be opened (file doesn'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 unzFile ZEXPORT unzOpen2 (path, pzlib_filefunc_def) |
| const char *path; |
| zlib_filefunc_def* pzlib_filefunc_def; |
| { |
| unz_s us; |
| unz_s *s; |
| uLong central_pos,uL; |
| |
| uLong number_disk; /* number of the current dist, used for |
| spaning ZIP, unsupported, always 0*/ |
| uLong number_disk_with_CD; /* number the the disk with central dir, used |
| for spaning ZIP, unsupported, always 0*/ |
| uLong number_entry_CD; /* total number of entries in |
| the central dir |
| (same than number_entry on nospan) */ |
| |
| int err=UNZ_OK; |
| |
| if (unz_copyright[0]!=' ') |
| return NULL; |
| |
| if (pzlib_filefunc_def==NULL) |
| fill_fopen_filefunc(&us.z_filefunc); |
| else |
| us.z_filefunc = *pzlib_filefunc_def; |
| |
| us.filestream= (*(us.z_filefunc.zopen_file))(us.z_filefunc.opaque, |
| path, |
| ZLIB_FILEFUNC_MODE_READ | |
| ZLIB_FILEFUNC_MODE_EXISTING); |
| if (us.filestream==NULL) |
| return NULL; |
| |
| central_pos = unzlocal_SearchCentralDir(&us.z_filefunc,us.filestream); |
| if (central_pos==0) |
| err=UNZ_ERRNO; |
| |
| if (ZSEEK(us.z_filefunc, us.filestream, |
| central_pos,ZLIB_FILEFUNC_SEEK_SET)!=0) |
| err=UNZ_ERRNO; |
| |
| /* the signature, already checked */ |
| if (unzlocal_getLong(&us.z_filefunc, us.filestream,&uL)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| /* number of this disk */ |
| if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| /* number of the disk with the start of the central directory */ |
| if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_disk_with_CD)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| /* total number of entries in the central dir on this disk */ |
| if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.number_entry)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| /* total number of entries in the central dir */ |
| if (unzlocal_getShort(&us.z_filefunc, us.filestream,&number_entry_CD)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if ((number_entry_CD!=us.gi.number_entry) || |
| (number_disk_with_CD!=0) || |
| (number_disk!=0)) |
| err=UNZ_BADZIPFILE; |
| |
| /* size of the central directory */ |
| if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.size_central_dir)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| /* offset of start of central directory with respect to the |
| starting disk number */ |
| if (unzlocal_getLong(&us.z_filefunc, us.filestream,&us.offset_central_dir)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| /* zipfile comment length */ |
| if (unzlocal_getShort(&us.z_filefunc, us.filestream,&us.gi.size_comment)!=UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if ((central_pos<us.offset_central_dir+us.size_central_dir) && |
| (err==UNZ_OK)) |
| err=UNZ_BADZIPFILE; |
| |
| if (err!=UNZ_OK) |
| { |
| ZCLOSE(us.z_filefunc, us.filestream); |
| return NULL; |
| } |
| |
| us.byte_before_the_zipfile = central_pos - |
| (us.offset_central_dir+us.size_central_dir); |
| us.central_pos = central_pos; |
| us.pfile_in_zip_read = NULL; |
| us.encrypted = 0; |
| |
| |
| s=(unz_s*)ALLOC(sizeof(unz_s)); |
| *s=us; |
| unzGoToFirstFile((unzFile)s); |
| return (unzFile)s; |
| } |
| |
| |
| extern unzFile ZEXPORT unzOpen (path) |
| const char *path; |
| { |
| return unzOpen2(path, NULL); |
| } |
| |
| /* |
| Close a ZipFile opened with unzipOpen. |
| If there is files inside the .Zip opened with unzipOpenCurrentFile (see later), |
| these files MUST be closed with unzipCloseCurrentFile before call unzipClose. |
| return UNZ_OK if there is no problem. */ |
| extern int ZEXPORT unzClose (file) |
| unzFile file; |
| { |
| unz_s* s; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| |
| if (s->pfile_in_zip_read!=NULL) |
| unzCloseCurrentFile(file); |
| |
| ZCLOSE(s->z_filefunc, s->filestream); |
| TRYFREE(s); |
| return UNZ_OK; |
| } |
| |
| |
| /* |
| 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 unzGetGlobalInfo (file,pglobal_info) |
| unzFile file; |
| unz_global_info *pglobal_info; |
| { |
| unz_s* s; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| *pglobal_info=s->gi; |
| return UNZ_OK; |
| } |
| |
| |
| /* |
| Translate date/time from Dos format to tm_unz (readable more easilty) |
| */ |
| local void unzlocal_DosDateToTmuDate (ulDosDate, ptm) |
| uLong ulDosDate; |
| tm_unz* ptm; |
| { |
| uLong uDate; |
| uDate = (uLong)(ulDosDate>>16); |
| ptm->tm_mday = (uInt)(uDate&0x1f) ; |
| ptm->tm_mon = (uInt)((((uDate)&0x1E0)/0x20)-1) ; |
| ptm->tm_year = (uInt)(((uDate&0x0FE00)/0x0200)+1980) ; |
| |
| ptm->tm_hour = (uInt) ((ulDosDate &0xF800)/0x800); |
| ptm->tm_min = (uInt) ((ulDosDate&0x7E0)/0x20) ; |
| ptm->tm_sec = (uInt) (2*(ulDosDate&0x1f)) ; |
| } |
| |
| /* |
| Get Info about the current file in the zipfile, with internal only info |
| */ |
| local int unzlocal_GetCurrentFileInfoInternal OF((unzFile file, |
| unz_file_info *pfile_info, |
| unz_file_info_internal |
| *pfile_info_internal, |
| char *szFileName, |
| uLong fileNameBufferSize, |
| void *extraField, |
| uLong extraFieldBufferSize, |
| char *szComment, |
| uLong commentBufferSize)); |
| |
| local int unzlocal_GetCurrentFileInfoInternal (file, |
| pfile_info, |
| pfile_info_internal, |
| szFileName, fileNameBufferSize, |
| extraField, extraFieldBufferSize, |
| szComment, commentBufferSize) |
| unzFile file; |
| unz_file_info *pfile_info; |
| unz_file_info_internal *pfile_info_internal; |
| char *szFileName; |
| uLong fileNameBufferSize; |
| void *extraField; |
| uLong extraFieldBufferSize; |
| char *szComment; |
| uLong commentBufferSize; |
| { |
| unz_s* s; |
| unz_file_info file_info; |
| unz_file_info_internal file_info_internal; |
| int err=UNZ_OK; |
| uLong uMagic; |
| long lSeek=0; |
| |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| if (ZSEEK(s->z_filefunc, s->filestream, |
| s->pos_in_central_dir+s->byte_before_the_zipfile, |
| ZLIB_FILEFUNC_SEEK_SET)!=0) |
| err=UNZ_ERRNO; |
| |
| |
| /* we check the magic */ |
| if (err==UNZ_OK) |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK) |
| err=UNZ_ERRNO; |
| else if (uMagic!=0x02014b50) |
| err=UNZ_BADZIPFILE; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.version_needed) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.flag) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.compression_method) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.dosDate) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| unzlocal_DosDateToTmuDate(file_info.dosDate,&file_info.tmu_date); |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.crc) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.compressed_size) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.uncompressed_size) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_filename) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_extra) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.size_file_comment) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.disk_num_start) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&file_info.internal_fa) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info.external_fa) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&file_info_internal.offset_curfile) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| lSeek+=file_info.size_filename; |
| if ((err==UNZ_OK) && (szFileName!=NULL)) |
| { |
| uLong uSizeRead ; |
| if (file_info.size_filename<fileNameBufferSize) |
| { |
| *(szFileName+file_info.size_filename)='\0'; |
| uSizeRead = file_info.size_filename; |
| } |
| else |
| uSizeRead = fileNameBufferSize; |
| |
| if ((file_info.size_filename>0) && (fileNameBufferSize>0)) |
| if (ZREAD(s->z_filefunc, s->filestream,szFileName,uSizeRead)!=uSizeRead) |
| err=UNZ_ERRNO; |
| lSeek -= uSizeRead; |
| } |
| |
| |
| if ((err==UNZ_OK) && (extraField!=NULL)) |
| { |
| uLong uSizeRead ; |
| if (file_info.size_file_extra<extraFieldBufferSize) |
| uSizeRead = file_info.size_file_extra; |
| else |
| uSizeRead = extraFieldBufferSize; |
| |
| if (lSeek!=0) |
| if (ZSEEK(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0) |
| lSeek=0; |
| else |
| err=UNZ_ERRNO; |
| if ((file_info.size_file_extra>0) && (extraFieldBufferSize>0)) |
| if (ZREAD(s->z_filefunc, s->filestream,extraField,uSizeRead)!=uSizeRead) |
| err=UNZ_ERRNO; |
| lSeek += file_info.size_file_extra - uSizeRead; |
| } |
| else |
| lSeek+=file_info.size_file_extra; |
| |
| |
| if ((err==UNZ_OK) && (szComment!=NULL)) |
| { |
| uLong uSizeRead ; |
| if (file_info.size_file_comment<commentBufferSize) |
| { |
| *(szComment+file_info.size_file_comment)='\0'; |
| uSizeRead = file_info.size_file_comment; |
| } |
| else |
| uSizeRead = commentBufferSize; |
| |
| if (lSeek!=0) |
| if (ZSEEK(s->z_filefunc, s->filestream,lSeek,ZLIB_FILEFUNC_SEEK_CUR)==0) |
| lSeek=0; |
| else |
| err=UNZ_ERRNO; |
| if ((file_info.size_file_comment>0) && (commentBufferSize>0)) |
| if (ZREAD(s->z_filefunc, s->filestream,szComment,uSizeRead)!=uSizeRead) |
| err=UNZ_ERRNO; |
| lSeek+=file_info.size_file_comment - uSizeRead; |
| } |
| else |
| lSeek+=file_info.size_file_comment; |
| |
| if ((err==UNZ_OK) && (pfile_info!=NULL)) |
| *pfile_info=file_info; |
| |
| if ((err==UNZ_OK) && (pfile_info_internal!=NULL)) |
| *pfile_info_internal=file_info_internal; |
| |
| return err; |
| } |
| |
| |
| |
| /* |
| 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 unzGetCurrentFileInfo (file, |
| pfile_info, |
| szFileName, fileNameBufferSize, |
| extraField, extraFieldBufferSize, |
| szComment, commentBufferSize) |
| unzFile file; |
| unz_file_info *pfile_info; |
| char *szFileName; |
| uLong fileNameBufferSize; |
| void *extraField; |
| uLong extraFieldBufferSize; |
| char *szComment; |
| uLong commentBufferSize; |
| { |
| return unzlocal_GetCurrentFileInfoInternal(file,pfile_info,NULL, |
| szFileName,fileNameBufferSize, |
| extraField,extraFieldBufferSize, |
| szComment,commentBufferSize); |
| } |
| |
| /* |
| Set the current file of the zipfile to the first file. |
| return UNZ_OK if there is no problem |
| */ |
| extern int ZEXPORT unzGoToFirstFile (file) |
| unzFile file; |
| { |
| int err=UNZ_OK; |
| unz_s* s; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| s->pos_in_central_dir=s->offset_central_dir; |
| s->num_file=0; |
| 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; |
| } |
| |
| /* |
| 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 (file) |
| unzFile file; |
| { |
| unz_s* s; |
| int err; |
| |
| if (file==NULL) |
| 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; |
| } |
| |
| |
| /* |
| Try locate the file szFileName in the zipfile. |
| For the iCaseSensitivity signification, see unzipStringFileNameCompare |
| |
| 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 unzLocateFile (file, szFileName, iCaseSensitivity) |
| unzFile file; |
| const char *szFileName; |
| int iCaseSensitivity; |
| { |
| unz_s* s; |
| int err; |
| |
| /* We remember the 'current' position in the file so that we can jump |
| * back there if we fail. |
| */ |
| unz_file_info cur_file_infoSaved; |
| unz_file_info_internal cur_file_info_internalSaved; |
| uLong num_fileSaved; |
| uLong pos_in_central_dirSaved; |
| |
| |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| |
| if (strlen(szFileName)>=UNZ_MAXFILENAMEINZIP) |
| return UNZ_PARAMERROR; |
| |
| s=(unz_s*)file; |
| if (!s->current_file_ok) |
| return UNZ_END_OF_LIST_OF_FILE; |
| |
| /* Save the current state */ |
| num_fileSaved = s->num_file; |
| pos_in_central_dirSaved = s->pos_in_central_dir; |
| cur_file_infoSaved = s->cur_file_info; |
| cur_file_info_internalSaved = s->cur_file_info_internal; |
| |
| err = unzGoToFirstFile(file); |
| |
| while (err == UNZ_OK) |
| { |
| char szCurrentFileName[UNZ_MAXFILENAMEINZIP+1]; |
| err = unzGetCurrentFileInfo(file,NULL, |
| szCurrentFileName,sizeof(szCurrentFileName)-1, |
| NULL,0,NULL,0); |
| if (err == UNZ_OK) |
| { |
| if (unzStringFileNameCompare(szCurrentFileName, |
| szFileName,iCaseSensitivity)==0) |
| return UNZ_OK; |
| err = unzGoToNextFile(file); |
| } |
| } |
| |
| /* We failed, so restore the state of the 'current file' to where we |
| * were. |
| */ |
| s->num_file = num_fileSaved ; |
| s->pos_in_central_dir = pos_in_central_dirSaved ; |
| s->cur_file_info = cur_file_infoSaved; |
| s->cur_file_info_internal = cur_file_info_internalSaved; |
| return err; |
| } |
| |
| |
| /* |
| /////////////////////////////////////////// |
| // Contributed by Ryan Haksi (mailto://cryogen@infoserve.net) |
| // I need random access |
| // |
| // Further optimization could be realized by adding an ability |
| // to cache the directory in memory. The goal being a single |
| // comprehensive file read to put the file I need in a memory. |
| */ |
| |
| /* |
| typedef struct unz_file_pos_s |
| { |
| uLong pos_in_zip_directory; // offset in file |
| uLong num_of_file; // # of file |
| } unz_file_pos; |
| */ |
| |
| extern int ZEXPORT unzGetFilePos(file, file_pos) |
| unzFile file; |
| unz_file_pos* file_pos; |
| { |
| unz_s* s; |
| |
| if (file==NULL || file_pos==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| if (!s->current_file_ok) |
| return UNZ_END_OF_LIST_OF_FILE; |
| |
| file_pos->pos_in_zip_directory = s->pos_in_central_dir; |
| file_pos->num_of_file = s->num_file; |
| |
| return UNZ_OK; |
| } |
| |
| extern int ZEXPORT unzGoToFilePos(file, file_pos) |
| unzFile file; |
| unz_file_pos* file_pos; |
| { |
| unz_s* s; |
| int err; |
| |
| if (file==NULL || file_pos==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| |
| /* jump to the right spot */ |
| s->pos_in_central_dir = file_pos->pos_in_zip_directory; |
| s->num_file = file_pos->num_of_file; |
| |
| /* set the current file */ |
| err = unzlocal_GetCurrentFileInfoInternal(file,&s->cur_file_info, |
| &s->cur_file_info_internal, |
| NULL,0,NULL,0,NULL,0); |
| /* return results */ |
| s->current_file_ok = (err == UNZ_OK); |
| return err; |
| } |
| |
| /* |
| // Unzip Helper Functions - should be here? |
| /////////////////////////////////////////// |
| */ |
| |
| /* |
| 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 (s,piSizeVar, |
| poffset_local_extrafield, |
| psize_local_extrafield) |
| 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 (ZSEEK(s->z_filefunc, s->filestream,s->cur_file_info_internal.offset_curfile + |
| s->byte_before_the_zipfile,ZLIB_FILEFUNC_SEEK_SET)!=0) |
| return UNZ_ERRNO; |
| |
| |
| if (err==UNZ_OK) |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uMagic) != UNZ_OK) |
| err=UNZ_ERRNO; |
| else if (uMagic!=0x04034b50) |
| err=UNZ_BADZIPFILE; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) |
| err=UNZ_ERRNO; |
| /* |
| else if ((err==UNZ_OK) && (uData!=s->cur_file_info.wVersion)) |
| err=UNZ_BADZIPFILE; |
| */ |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&uFlags) != UNZ_OK) |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getShort(&s->z_filefunc, s->filestream,&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; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* date/time */ |
| err=UNZ_ERRNO; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* crc */ |
| err=UNZ_ERRNO; |
| else if ((err==UNZ_OK) && (uData!=s->cur_file_info.crc) && |
| ((uFlags & 8)==0)) |
| err=UNZ_BADZIPFILE; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size compr */ |
| err=UNZ_ERRNO; |
| else if ((err==UNZ_OK) && (uData!=s->cur_file_info.compressed_size) && |
| ((uFlags & 8)==0)) |
| err=UNZ_BADZIPFILE; |
| |
| if (unzlocal_getLong(&s->z_filefunc, s->filestream,&uData) != UNZ_OK) /* size uncompr */ |
| 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->z_filefunc, s->filestream,&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->z_filefunc, s->filestream,&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 unzOpenCurrentFile3 (file, method, level, raw, password) |
| unzFile file; |
| int* method; |
| int* level; |
| int raw; |
| const char* password; |
| { |
| int err=UNZ_OK; |
| 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 */ |
| # ifndef NOUNCRYPT |
| char source[12]; |
| # else |
| if (password != NULL) |
| return UNZ_PARAMERROR; |
| # endif |
| |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| if (!s->current_file_ok) |
| return UNZ_PARAMERROR; |
| |
| if (s->pfile_in_zip_read != NULL) |
| 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==NULL) |
| 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; |
| pfile_in_zip_read_info->raw=raw; |
| |
| if (pfile_in_zip_read_info->read_buffer==NULL) |
| { |
| TRYFREE(pfile_in_zip_read_info); |
| return UNZ_INTERNALERROR; |
| } |
| |
| pfile_in_zip_read_info->stream_initialised=0; |
| |
| if (method!=NULL) |
| *method = (int)s->cur_file_info.compression_method; |
| |
| if (level!=NULL) |
| { |
| *level = 6; |
| switch (s->cur_file_info.flag & 0x06) |
| { |
| case 6 : *level = 1; break; |
| case 4 : *level = 2; break; |
| case 2 : *level = 9; break; |
| } |
| } |
| |
| if ((s->cur_file_info.compression_method!=0) && |
| (s->cur_file_info.compression_method!=Z_DEFLATED)) |
| err=UNZ_BADZIPFILE; |
| |
| 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->filestream=s->filestream; |
| pfile_in_zip_read_info->z_filefunc=s->z_filefunc; |
| pfile_in_zip_read_info->byte_before_the_zipfile=s->byte_before_the_zipfile; |
| |
| pfile_in_zip_read_info->stream.total_out = 0; |
| |
| if ((s->cur_file_info.compression_method==Z_DEFLATED) && |
| (!raw)) |
| { |
| 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; |
| pfile_in_zip_read_info->stream.next_in = (voidpf)0; |
| pfile_in_zip_read_info->stream.avail_in = 0; |
| |
| err=inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS); |
| if (err == Z_OK) |
| pfile_in_zip_read_info->stream_initialised=1; |
| else |
| return err; |
| /* 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; |
| |
| # ifndef NOUNCRYPT |
| if (password != NULL) |
| { |
| int i; |
| s->pcrc_32_tab = get_crc_table(); |
| init_keys(password,s->keys,s->pcrc_32_tab); |
| if (ZSEEK(s->z_filefunc, s->filestream, |
| s->pfile_in_zip_read->pos_in_zipfile + |
| s->pfile_in_zip_read->byte_before_the_zipfile, |
| SEEK_SET)!=0) |
| return UNZ_INTERNALERROR; |
| if(ZREAD(s->z_filefunc, s->filestream,source, 12)<12) |
| return UNZ_INTERNALERROR; |
| |
| for (i = 0; i<12; i++) |
| zdecode(s->keys,s->pcrc_32_tab,source[i]); |
| |
| s->pfile_in_zip_read->pos_in_zipfile+=12; |
| s->encrypted=1; |
| } |
| # endif |
| |
| |
| return UNZ_OK; |
| } |
| |
| extern int ZEXPORT unzOpenCurrentFile (file) |
| unzFile file; |
| { |
| return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL); |
| } |
| |
| extern int ZEXPORT unzOpenCurrentFilePassword (file, password) |
| unzFile file; |
| const char* password; |
| { |
| return unzOpenCurrentFile3(file, NULL, NULL, 0, password); |
| } |
| |
| extern int ZEXPORT unzOpenCurrentFile2 (file,method,level,raw) |
| unzFile file; |
| int* method; |
| int* level; |
| int raw; |
| { |
| return unzOpenCurrentFile3(file, method, level, raw, NULL); |
| } |
| |
| /* |
| 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 (file, buf, len) |
| 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==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| pfile_in_zip_read_info=s->pfile_in_zip_read; |
| |
| if (pfile_in_zip_read_info==NULL) |
| return UNZ_PARAMERROR; |
| |
| |
| if ((pfile_in_zip_read_info->read_buffer == NULL)) |
| return UNZ_END_OF_LIST_OF_FILE; |
| if (len==0) |
| 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 == 0) |
| return UNZ_EOF; |
| if (ZSEEK(pfile_in_zip_read_info->z_filefunc, |
| pfile_in_zip_read_info->filestream, |
| pfile_in_zip_read_info->pos_in_zipfile + |
| pfile_in_zip_read_info->byte_before_the_zipfile, |
| ZLIB_FILEFUNC_SEEK_SET)!=0) |
| return UNZ_ERRNO; |
| if (ZREAD(pfile_in_zip_read_info->z_filefunc, |
| pfile_in_zip_read_info->filestream, |
| pfile_in_zip_read_info->read_buffer, |
| uReadThis)!=uReadThis) |
| return UNZ_ERRNO; |
| |
| |
| # ifndef NOUNCRYPT |
| if(s->encrypted) |
| { |
| uInt i; |
| for(i=0;i<uReadThis;i++) |
| pfile_in_zip_read_info->read_buffer[i] = |
| zdecode(s->keys,s->pcrc_32_tab, |
| pfile_in_zip_read_info->read_buffer[i]); |
| } |
| # endif |
| |
| |
| 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) || (pfile_in_zip_read_info->raw)) |
| { |
| uInt uDoCopy,i ; |
| |
| if ((pfile_in_zip_read_info->stream.avail_in == 0) && |
| (pfile_in_zip_read_info->rest_read_compressed == 0)) |
| return (iRead==0) ? UNZ_EOF : iRead; |
| |
| 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; |
| |
| /* |
| if ((pfile_in_zip_read_info->rest_read_uncompressed == |
| pfile_in_zip_read_info->stream.avail_out) && |
| (pfile_in_zip_read_info->rest_read_compressed == 0)) |
| flush = Z_FINISH; |
| */ |
| 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 (file) |
| unzFile file; |
| { |
| unz_s* s; |
| file_in_zip_read_info_s* pfile_in_zip_read_info; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| pfile_in_zip_read_info=s->pfile_in_zip_read; |
| |
| if (pfile_in_zip_read_info==NULL) |
| 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 (file) |
| unzFile file; |
| { |
| unz_s* s; |
| file_in_zip_read_info_s* pfile_in_zip_read_info; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| pfile_in_zip_read_info=s->pfile_in_zip_read; |
| |
| if (pfile_in_zip_read_info==NULL) |
| 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 (file,buf,len) |
| 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==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| pfile_in_zip_read_info=s->pfile_in_zip_read; |
| |
| if (pfile_in_zip_read_info==NULL) |
| return UNZ_PARAMERROR; |
| |
| size_to_read = (pfile_in_zip_read_info->size_local_extrafield - |
| pfile_in_zip_read_info->pos_local_extrafield); |
| |
| if (buf==NULL) |
| return (int)size_to_read; |
| |
| if (len>size_to_read) |
| read_now = (uInt)size_to_read; |
| else |
| read_now = (uInt)len ; |
| |
| if (read_now==0) |
| return 0; |
| |
| if (ZSEEK(pfile_in_zip_read_info->z_filefunc, |
| pfile_in_zip_read_info->filestream, |
| pfile_in_zip_read_info->offset_local_extrafield + |
| pfile_in_zip_read_info->pos_local_extrafield, |
| ZLIB_FILEFUNC_SEEK_SET)!=0) |
| return UNZ_ERRNO; |
| |
| if (ZREAD(pfile_in_zip_read_info->z_filefunc, |
| pfile_in_zip_read_info->filestream, |
| buf,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 (file) |
| unzFile file; |
| { |
| int err=UNZ_OK; |
| |
| unz_s* s; |
| file_in_zip_read_info_s* pfile_in_zip_read_info; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| pfile_in_zip_read_info=s->pfile_in_zip_read; |
| |
| if (pfile_in_zip_read_info==NULL) |
| return UNZ_PARAMERROR; |
| |
| |
| if ((pfile_in_zip_read_info->rest_read_uncompressed == 0) && |
| (!pfile_in_zip_read_info->raw)) |
| { |
| 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 (file, szComment, uSizeBuf) |
| unzFile file; |
| char *szComment; |
| uLong uSizeBuf; |
| { |
| int err=UNZ_OK; |
| unz_s* s; |
| uLong uReadThis ; |
| if (file==NULL) |
| return UNZ_PARAMERROR; |
| s=(unz_s*)file; |
| |
| uReadThis = uSizeBuf; |
| if (uReadThis>s->gi.size_comment) |
| uReadThis = s->gi.size_comment; |
| |
| if (ZSEEK(s->z_filefunc,s->filestream,s->central_pos+22,ZLIB_FILEFUNC_SEEK_SET)!=0) |
| return UNZ_ERRNO; |
| |
| if (uReadThis>0) |
| { |
| *szComment='\0'; |
| if (ZREAD(s->z_filefunc,s->filestream,szComment,uReadThis)!=uReadThis) |
| return UNZ_ERRNO; |
| } |
| |
| if ((szComment != NULL) && (uSizeBuf > s->gi.size_comment)) |
| *(szComment+s->gi.size_comment)='\0'; |
| return (int)uReadThis; |
| } |