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Diffstat (limited to 'archive/hgewin/ZLIB/unzip.c')
| -rw-r--r-- | archive/hgewin/ZLIB/unzip.c | 1592 |
1 files changed, 1592 insertions, 0 deletions
diff --git a/archive/hgewin/ZLIB/unzip.c b/archive/hgewin/ZLIB/unzip.c new file mode 100644 index 0000000..868f035 --- /dev/null +++ b/archive/hgewin/ZLIB/unzip.c @@ -0,0 +1,1592 @@ +/* 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; +} +*/
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