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Diffstat (limited to 'util/src/minizip/unzip.c')
| -rw-r--r-- | util/src/minizip/unzip.c | 1655 |
1 files changed, 1655 insertions, 0 deletions
diff --git a/util/src/minizip/unzip.c b/util/src/minizip/unzip.c new file mode 100644 index 0000000..146d93a --- /dev/null +++ b/util/src/minizip/unzip.c @@ -0,0 +1,1655 @@ + +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +/* unzip.c -- IO for uncompress .zip files using zlib + * Version 1.01e, February 12th, 2005 + * + * Copyright (C) 1998-2005 Gilles Vollant + * + * Read axis2_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 "axis2_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 1.01 Copyright 1998-2004 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 <axis2_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( + 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( + const zlib_filefunc_def *pzlib_filefunc_def, + voidpf filestream, + uLong *pX) +{ + uLong x; + int i = 0; + int err = 0; + + 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( + const zlib_filefunc_def *pzlib_filefunc_def, + voidpf filestream, + uLong *pX) +{ + uLong x; + int i = 0; + int err = 0; + + 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( + 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( + 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( + 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 = 0; + 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( + 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( + 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) + 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) */ +local void +unzlocal_DosDateToTmuDate( + 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( + 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 = 0x00000000; + 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)) + { + 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)) + { + 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)) + { + 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)) + *pfile_info = file_info; + + if ((err == UNZ_OK) && (pfile_info_internal)) + *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, + 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( + 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; +} + +/* + * 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( + unzFile file, + const char *szFileName, + int iCaseSensitivity) +{ + unz_s *s; + int err = 0; + + /* 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; + uLong num_of_file; +} unz_file_pos; +*/ + +extern int ZEXPORT +unzGetFilePos( + 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( + unzFile file, + unz_file_pos *file_pos) +{ + unz_s *s; + int err = 0; + + 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( + 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( + 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) + 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) + 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) + *method = (int) s->cur_file_info.compression_method; + + if (level) + { + *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 + { + TRYFREE(pfile_in_zip_read_info); + 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) + { + int i = 0; + 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); +} + +extern int ZEXPORT +unzOpenCurrentFile2( + 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( + 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->raw))) + pfile_in_zip_read_info->stream.avail_out = + (uInt) pfile_in_zip_read_info->rest_read_uncompressed; + + if ((len > pfile_in_zip_read_info->rest_read_compressed + + pfile_in_zip_read_info->stream.avail_in) && + (pfile_in_zip_read_info->raw)) + pfile_in_zip_read_info->stream.avail_out = + (uInt) pfile_in_zip_read_info->rest_read_compressed + + pfile_in_zip_read_info->stream.avail_in; + + 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] = + (char)zdecode(s->keys, s->pcrc_32_tab, + pfile_in_zip_read_info->read_buffer[i]); + /* We are sure that the conversion is safe */ + } +# 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); + + if ((err >= 0) && (pfile_in_zip_read_info->stream.msg)) + err = Z_DATA_ERROR; + + uTotalOutAfter = pfile_in_zip_read_info->stream.total_out; + uOutThis = uTotalOutAfter - uTotalOutBefore; + + pfile_in_zip_read_info->crc32 = + crc32(pfile_in_zip_read_info->crc32, bufBefore, + (uInt) (uOutThis)); + + pfile_in_zip_read_info->rest_read_uncompressed -= uOutThis; + + iRead += (uInt) (uTotalOutAfter - uTotalOutBefore); + + if (err == Z_STREAM_END) + return (iRead == 0) ? UNZ_EOF : iRead; + if (err != Z_OK) + break; + } + } + + if (err == Z_OK) + return iRead; + return err; +} + +/* Give the current position in uncompressed data */ +extern z_off_t ZEXPORT +unztell( + unzFile file) +{ + unz_s *s; + file_in_zip_read_info_s *pfile_in_zip_read_info; + if (file == 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, + 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, 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, + uLong uSizeBuf) +{ + 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) && (uSizeBuf > s->gi.size_comment)) + *(szComment + s->gi.size_comment) = '\0'; + return (int) uReadThis; +} + +/* Additions by RX '2004 */ +extern uLong ZEXPORT +unzGetOffset( + unzFile file) +{ + unz_s *s; + + if (file == NULL) + return 0; + s = (unz_s *) file; + if (!s->current_file_ok) + return 0; + if (s->gi.number_entry != 0 && s->gi.number_entry != 0xffff) + if (s->num_file == s->gi.number_entry) + return 0; + return s->pos_in_central_dir; +} + +extern int ZEXPORT +unzSetOffset( + unzFile file, + uLong pos) +{ + unz_s *s; + int err; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz_s *) file; + + s->pos_in_central_dir = pos; + s->num_file = s->gi.number_entry; /* hack */ + 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; +} |