diff options
Diffstat (limited to 'archive/hgewin/ZLIB/unzip.c')
| -rw-r--r-- | archive/hgewin/ZLIB/unzip.c | 1592 |
1 files changed, 0 insertions, 1592 deletions
diff --git a/archive/hgewin/ZLIB/unzip.c b/archive/hgewin/ZLIB/unzip.c deleted file mode 100644 index 868f035..0000000 --- a/archive/hgewin/ZLIB/unzip.c +++ /dev/null @@ -1,1592 +0,0 @@ -/* unzip.c -- IO for uncompress .zip files using zlib -Version 1.01, May 8th, 2004 - -Copyright (C) 1998-2004 Gilles Vollant - -Read unzip.h for more info - */ - -#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 - -/* 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 (32768) -#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) - -/* unz_file_info_interntal contain internal info about a file in zipfile*/ - -typedef struct unz_file_info_internal_s -{ - DWORD 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 */ - DWORD pos_in_zipfile; /* position in byte on the zipfile, for fseek*/ - DWORD stream_initialised; /* flag set if stream structure is initialised*/ - DWORD offset_local_extrafield; /* offset of the local extra field */ - DWORD size_local_extrafield; /* size of the local extra field */ - DWORD pos_local_extrafield; /* position in the local extra field in read*/ - DWORD crc32; /* crc32 of all data uncompressed */ - DWORD crc32_wait; /* crc32 we must obtain after decompress all */ - DWORD rest_read_compressed; /* number of byte to be decompressed */ - DWORD rest_read_uncompressed; /*number of byte to be obtained after decomp*/ - zlib_filefunc_def z_filefunc; - void *filestream; /* io structore of the zipfile */ - DWORD compression_method; /* compression method (0==store) */ - DWORD 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; - void *filestream; /* io structore of the zipfile */ - unz_global_info gi; /* public global information */ - DWORD byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx)*/ - DWORD num_file; /* number of the current file in the zipfile*/ - DWORD pos_in_central_dir; /* pos of the current file in the central dir*/ - DWORD current_file_ok; /* flag about the usability of the current file*/ - DWORD central_pos; /* position of the beginning of the central dir*/ - DWORD size_central_dir; /* size of the central directory */ - DWORD 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 - DWORD keys[3]; /* keys defining the pseudo-random sequence */ - const DWORD *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. - */ - - -static int unzlocal_getByte(const zlib_filefunc_def *pzlib_filefunc_def, void *filestream, int *pi) -{ - BYTE 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 - */ - -static int unzlocal_getShort(const zlib_filefunc_def *pzlib_filefunc_def, void *filestream, DWORD *pX) -{ - DWORD x; - int i; - int err; - - err = unzlocal_getByte(pzlib_filefunc_def, filestream, &i); - - x = (DWORD)i; - - if (err == UNZ_OK) - { - err = unzlocal_getByte(pzlib_filefunc_def, filestream, &i); - } - - x += ((DWORD)i) << 8; - - if (err == UNZ_OK) - { - *pX = x; - } - else - { - *pX = 0; - } - - return err; -} - -//------------------------------------------------------------------------- - - -static int unzlocal_getLong(const zlib_filefunc_def *pzlib_filefunc_def, void *filestream, DWORD *pX) -{ - DWORD x; - int i; - int err; - - err = unzlocal_getByte(pzlib_filefunc_def, filestream, &i); - x = (DWORD)i; - - if (err == UNZ_OK) - { - err = unzlocal_getByte(pzlib_filefunc_def, filestream, &i); - } - x += ((DWORD)i) << 8; - - if (err == UNZ_OK) - { - err = unzlocal_getByte(pzlib_filefunc_def, filestream, &i); - } - x += ((DWORD)i) << 16; - - if (err == UNZ_OK) - { - err = unzlocal_getByte(pzlib_filefunc_def, filestream, &i); - } - x += ((DWORD)i) << 24; - - if (err == UNZ_OK) - { - *pX = x; - } - else - { - *pX = 0; - } - return err; -} - - -//------------------------------------------------------------------------- - - -#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(const char *fileName1, const char *fileName2, int iCaseSensitivity) -{ - if (iCaseSensitivity == 0) - { - iCaseSensitivity = CASESENSITIVITYDEFAULTVALUE; - } - - if (iCaseSensitivity == 1) - { - return strcmp(fileName1, fileName2); - } - - return stricmp(fileName1, fileName2); -} -*/ -//------------------------------------------------------------------------- - -#ifndef BUFREADCOMMENT - #define BUFREADCOMMENT (0x400) -#endif - -/* -Locate the Central directory of a zipfile (at the end, just before -the global comment) - */ - -static DWORD unzlocal_SearchCentralDir(const zlib_filefunc_def *pzlib_filefunc_def, void *filestream) -{ - BYTE *buf; - DWORD uSizeFile; - DWORD uBackRead; - DWORD uMaxBack = 0xffff; /* maximum size of global comment */ - DWORD uPosFound = 0; - - if (ZSEEK(*pzlib_filefunc_def, filestream, 0, SEEK_END) != 0) - { - return 0; - } - - - uSizeFile = ZTELL(*pzlib_filefunc_def, filestream); - - if (uMaxBack > uSizeFile) - { - uMaxBack = uSizeFile; - } - - buf = (BYTE*)ALLOC(BUFREADCOMMENT + 4); - if (buf == NULL) - { - return 0; - } - - uBackRead = 4; - while (uBackRead < uMaxBack) - { - DWORD 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, 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(const char *path, zlib_filefunc_def *pzlib_filefunc_def) -{ - unz_s us; - unz_s *s; - DWORD central_pos, uL; - - DWORD number_disk; /* number of the current dist, used for - spaning ZIP, unsupported, always 0*/ - DWORD number_disk_with_CD; /* number the the disk with central dir, used - for spaning ZIP, unsupported, always 0*/ - DWORD number_entry_CD; /* total number of entries in - the central dir - (same than number_entry on nospan) */ - - int err = UNZ_OK; - - 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, 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(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(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(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) - */ - -static void unzlocal_DosDateToTmuDate(DWORD ulDosDate, tm_unz *ptm) -{ - DWORD uDate; - uDate = (DWORD)(ulDosDate >> 16); - ptm->tm_mday = (DWORD)(uDate &0x1f); - ptm->tm_mon = (DWORD)((((uDate) &0x1E0) / 0x20) - 1); - ptm->tm_year = (DWORD)(((uDate &0x0FE00) / 0x0200) + 1980); - - ptm->tm_hour = (DWORD)((ulDosDate &0xF800) / 0x800); - ptm->tm_min = (DWORD)((ulDosDate &0x7E0) / 0x20); - ptm->tm_sec = (DWORD)(2 *(ulDosDate &0x1f)); -} - -/* -Get Info about the current file in the zipfile, with internal only info - */ - -static int unzlocal_GetCurrentFileInfoInternal(unzFile file, unz_file_info *pfile_info, unz_file_info_internal *pfile_info_internal, char *szFileName, DWORD fileNameBufferSize, void *extraField, DWORD extraFieldBufferSize, char *szComment, DWORD commentBufferSize) -{ - unz_s *s; - unz_file_info file_info; - unz_file_info_internal file_info_internal; - int err = UNZ_OK; - DWORD 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, 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)) - { - DWORD 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)) - { - DWORD 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, 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)) - { - DWORD 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, 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(unzFile file, unz_file_info *pfile_info, char *szFileName, DWORD fileNameBufferSize, void *extraField, DWORD extraFieldBufferSize, char *szComment, DWORD 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(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(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->gi.number_entry != 0xffff) - { - /* 2^16 files overflow hack */ - 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 unzGetCurrentFileID(unzFile file, DWORD *file_num, DWORD *pos_in_central_dir) -{ - unz_s *s; - - if (file == NULL) - { - return UNZ_PARAMERROR; - } - - s = (unz_s*)file; - *file_num = s->num_file; - *pos_in_central_dir = s->pos_in_central_dir; - return UNZ_OK; -} - -extern int ZEXPORT unzGoToFileID(unzFile file, DWORD file_num, DWORD pos_in_central_dir) -{ - unz_s *s; - int err; - - if (file == NULL) - { - return UNZ_PARAMERROR; - } - - s = (unz_s*)file; - s->num_file = file_num; - s->pos_in_central_dir = pos_in_central_dir; - 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 - */ - - - -//------------------------------------------------------------------------- - - -/* -// 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) - */ - -static int unzlocal_CheckCurrentFileCoherencyHeader(unz_s *s, DWORD *piSizeVar, DWORD *poffset_local_extrafield, DWORD *psize_local_extrafield) -{ - DWORD uMagic, uData, uFlags; - DWORD size_filename; - DWORD 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, 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; - } - - 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 += (DWORD)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 = (DWORD)size_extra_field; - - *piSizeVar += (DWORD)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(unzFile file, int *method, int *level, int raw, const char *password) -{ - int err = UNZ_OK; - DWORD iSizeVar; - unz_s *s; - file_in_zip_read_info_s *pfile_in_zip_read_info; - DWORD offset_local_extrafield; // offset of the local extra field - DWORD 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 = (void*)0; - pfile_in_zip_read_info->stream.next_in = (void*)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 = (DWORD)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(unzFile file) -{ - return unzOpenCurrentFile3(file, NULL, NULL, 0, NULL); -} - -//------------------------------------------------------------------------- - -extern int ZEXPORT unzOpenCurrentFilePassword(unzFile file, const char *password) -{ - return unzOpenCurrentFile3(file, NULL, NULL, 0, password); -} - -//------------------------------------------------------------------------- - -/* -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, void *buf, DWORD len) -{ - int err = UNZ_OK; - DWORD 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 = (BYTE*)buf; - pfile_in_zip_read_info->stream.avail_out = (DWORD)len; - - if (len > pfile_in_zip_read_info->rest_read_uncompressed) - { - pfile_in_zip_read_info->stream.avail_out = (DWORD)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)) - { - DWORD uReadThis = UNZ_BUFSIZE; - if (pfile_in_zip_read_info->rest_read_compressed < uReadThis) - { - uReadThis = (DWORD)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, 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) - { - DWORD 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 = (BYTE*)pfile_in_zip_read_info->read_buffer; - pfile_in_zip_read_info->stream.avail_in = (DWORD)uReadThis; - } - - if ((pfile_in_zip_read_info->compression_method == 0) || (pfile_in_zip_read_info->raw)) - { - DWORD 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 - { - DWORD uTotalOutBefore, uTotalOutAfter; - const BYTE *bufBefore; - DWORD 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, (DWORD)(uOutThis)); - - pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis; - - iRead += (DWORD)(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 == 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(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(unzFile file, void *buf, DWORD len) -{ - unz_s *s; - file_in_zip_read_info_s *pfile_in_zip_read_info; - DWORD read_now; - DWORD 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 = (DWORD)size_to_read; - } - else - { - read_now = (DWORD)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, SEEK_SET) != 0) - { - return UNZ_ERRNO; - } - - if (ZREAD(pfile_in_zip_read_info->z_filefunc, pfile_in_zip_read_info->filestream, buf, read_now) != read_now) - { - 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 == 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(unzFile file, char *szComment, DWORD uSizeBuf) -{ - //int err = UNZ_OK; - unz_s *s; - DWORD 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, 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; -} -*/
\ No newline at end of file |