diff options
Diffstat (limited to 'src/mesh/assimp-master/contrib/unzip/unzip.c')
| -rw-r--r-- | src/mesh/assimp-master/contrib/unzip/unzip.c | 2000 |
1 files changed, 2000 insertions, 0 deletions
diff --git a/src/mesh/assimp-master/contrib/unzip/unzip.c b/src/mesh/assimp-master/contrib/unzip/unzip.c new file mode 100644 index 0000000..f1eddee --- /dev/null +++ b/src/mesh/assimp-master/contrib/unzip/unzip.c @@ -0,0 +1,2000 @@ +/* unzip.c -- IO for uncompress .zip files using zlib + Version 1.1, February 14h, 2010 + part of the MiniZip project + + Copyright (C) 1998-2010 Gilles Vollant + http://www.winimage.com/zLibDll/minizip.html + Modifications of Unzip for Zip64 + Copyright (C) 2007-2008 Even Rouault + Modifications for Zip64 support on both zip and unzip + Copyright (C) 2009-2010 Mathias Svensson + http://result42.com + Modifications for AES, PKWARE disk spanning + Copyright (C) 2010-2014 Nathan Moinvaziri + + This program is distributed under the terms of the same license as zlib. + See the accompanying LICENSE file for the full text of the license. +*/ + +#include <stdio.h> +#include <stdlib.h> +#include <stdint.h> +#include <string.h> +#include <errno.h> + +#include "zlib.h" +#include "unzip.h" + +#ifdef HAVE_AES +# define AES_METHOD (99) +# define AES_PWVERIFYSIZE (2) +# define AES_MAXSALTLENGTH (16) +# define AES_AUTHCODESIZE (10) +# define AES_HEADERSIZE (11) +# define AES_KEYSIZE(mode) (64 + (mode * 64)) + +# include "aes/aes.h" +# include "aes/fileenc.h" +#endif +#ifdef HAVE_APPLE_COMPRESSION +# include <compression.h> +#endif + +#ifndef NOUNCRYPT +# include "crypt.h" +#endif + +#define DISKHEADERMAGIC (0x08074b50) +#define LOCALHEADERMAGIC (0x04034b50) +#define CENTRALHEADERMAGIC (0x02014b50) +#define ENDHEADERMAGIC (0x06054b50) +#define ZIP64ENDHEADERMAGIC (0x06064b50) +#define ZIP64ENDLOCHEADERMAGIC (0x07064b50) + +#define SIZECENTRALDIRITEM (0x2e) +#define SIZECENTRALHEADERLOCATOR (0x14) +#define SIZEZIPLOCALHEADER (0x1e) + +#ifndef BUFREADCOMMENT +# define BUFREADCOMMENT (0x400) +#endif + +#ifndef UNZ_BUFSIZE +# define UNZ_BUFSIZE (UINT16_MAX) +#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 + +#ifdef _WIN32 +# pragma warning(push) +# pragma warning(disable : 4131 4244 4189 4245) +#endif // _WIN32 + +const char unz_copyright[] = + " unzip 1.01 Copyright 1998-2004 Gilles Vollant - http://www.winimage.com/zLibDll"; + +/* unz_file_info_internal contain internal info about a file in zipfile*/ +typedef struct unz_file_info64_internal_s +{ + uint64_t offset_curfile; /* relative offset of local header 8 bytes */ + uint64_t byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx) */ +#ifdef HAVE_AES + uint8_t aes_encryption_mode; + uint16_t aes_compression_method; + uint16_t aes_version; +#endif +} unz_file_info64_internal; + +/* file_in_zip_read_info_s contain internal information about a file in zipfile */ +typedef struct +{ + uint8_t *read_buffer; /* internal buffer for compressed data */ + z_stream stream; /* zLib stream structure for inflate */ +#ifdef HAVE_BZIP2 + bz_stream bstream; /* bzLib stream structure for bziped */ +#endif +#ifdef HAVE_APPLE_COMPRESSION + compression_stream astream; /* libcompression stream structure */ +#endif +#ifdef HAVE_AES + fcrypt_ctx aes_ctx; +#endif + uint64_t pos_in_zipfile; /* position in byte on the zipfile, for fseek */ + uint8_t stream_initialised; /* flag set if stream structure is initialised */ + + uint64_t offset_local_extrafield; /* offset of the local extra field */ + uint16_t size_local_extrafield; /* size of the local extra field */ + uint64_t pos_local_extrafield; /* position in the local extra field in read */ + uint64_t total_out_64; + + uint32_t crc32; /* crc32 of all data uncompressed */ + uint32_t crc32_wait; /* crc32 we must obtain after decompress all */ + uint64_t rest_read_compressed; /* number of byte to be decompressed */ + uint64_t rest_read_uncompressed; /* number of byte to be obtained after decomp */ + + zlib_filefunc64_32_def z_filefunc; + + voidpf filestream; /* io structore of the zipfile */ + uint16_t compression_method; /* compression method (0==store) */ + uint64_t byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx) */ + int raw; +} file_in_zip64_read_info_s; + +/* unz64_s contain internal information about the zipfile */ +typedef struct +{ + zlib_filefunc64_32_def z_filefunc; + + voidpf filestream; /* io structure of the current zipfile */ + voidpf filestream_with_CD; /* io structure of the disk with the central directory */ + + unz_global_info64 gi; /* public global information */ + + uint64_t byte_before_the_zipfile; /* byte before the zipfile, (>0 for sfx) */ + uint64_t num_file; /* number of the current file in the zipfile */ + uint64_t pos_in_central_dir; /* pos of the current file in the central dir */ + uint64_t current_file_ok; /* flag about the usability of the current file */ + uint64_t central_pos; /* position of the beginning of the central dir */ + uint32_t number_disk; /* number of the current disk, used for spanning ZIP */ + uint64_t size_central_dir; /* size of the central directory */ + uint64_t offset_central_dir; /* offset of start of central directory with + respect to the starting disk number */ + + unz_file_info64 cur_file_info; /* public info about the current file in zip*/ + unz_file_info64_internal cur_file_info_internal; + /* private info about it*/ + file_in_zip64_read_info_s *pfile_in_zip_read; + /* structure about the current file if we are decompressing it */ + int is_zip64; /* is the current file zip64 */ +#ifndef NOUNCRYPT + uint32_t keys[3]; /* keys defining the pseudo-random sequence */ + const z_crc_t *pcrc_32_tab; +#endif +} unz64_s; + +/* Read a byte from a gz_stream; Return EOF for end of file. */ +static int unzReadUInt8(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint8_t *value) +{ + uint8_t c = 0; + if (ZREAD64(*pzlib_filefunc_def, filestream, &c, 1) == 1) + { + *value = (uint8_t)c; + return UNZ_OK; + } + *value = 0; + if (ZERROR64(*pzlib_filefunc_def, filestream)) + return UNZ_ERRNO; + return UNZ_EOF; +} + +static int unzReadUInt16(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint16_t *value) +{ + uint16_t x; + uint8_t c = 0; + int err = UNZ_OK; + + err = unzReadUInt8(pzlib_filefunc_def, filestream, &c); + x = (uint16_t)c; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &c); + x |= ((uint16_t)c) << 8; + + if (err == UNZ_OK) + *value = x; + else + *value = 0; + return err; +} + +static int unzReadUInt32(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint32_t *value) +{ + uint32_t x = 0; + uint8_t c = 0; + int err = UNZ_OK; + + err = unzReadUInt8(pzlib_filefunc_def, filestream, &c); + x = (uint32_t)c; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &c); + x |= ((uint32_t)c) << 8; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &c); + x |= ((uint32_t)c) << 16; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &c); + x += ((uint32_t)c) << 24; + + if (err == UNZ_OK) + *value = x; + else + *value = 0; + return err; +} + +static int unzReadUInt64(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, uint64_t *value) +{ + uint64_t x = 0; + uint8_t i = 0; + int err = UNZ_OK; + + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x = (uint64_t)i; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 8; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 16; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 24; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 32; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 40; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 48; + if (err == UNZ_OK) + err = unzReadUInt8(pzlib_filefunc_def, filestream, &i); + x |= ((uint64_t)i) << 56; + + if (err == UNZ_OK) + *value = x; + else + *value = 0; + return err; +} + +/* Locate the Central directory of a zip file (at the end, just before the global comment) */ +static uint64_t unzSearchCentralDir(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream) +{ + uint8_t buf[BUFREADCOMMENT + 4]; + uint64_t file_size = 0; + uint64_t back_read = 4; + uint64_t max_back = UINT16_MAX; /* maximum size of global comment */ + uint64_t pos_found = 0; + uint32_t read_size = 0; + uint64_t read_pos = 0; + uint32_t i = 0; + + if (ZSEEK64(*pzlib_filefunc_def, filestream, 0, ZLIB_FILEFUNC_SEEK_END) != 0) + return 0; + + file_size = ZTELL64(*pzlib_filefunc_def, filestream); + + if (max_back > file_size) + max_back = file_size; + + while (back_read < max_back) + { + if (back_read + BUFREADCOMMENT > max_back) + back_read = max_back; + else + back_read += BUFREADCOMMENT; + + read_pos = file_size - back_read; + read_size = ((BUFREADCOMMENT + 4) < (file_size - read_pos)) ? + (BUFREADCOMMENT + 4) : (uint32_t)(file_size - read_pos); + + if (ZSEEK64(*pzlib_filefunc_def, filestream, read_pos, ZLIB_FILEFUNC_SEEK_SET) != 0) + break; + if (ZREAD64(*pzlib_filefunc_def, filestream, buf, read_size) != read_size) + break; + + for (i = read_size - 3; (i--) > 0;) + if (((*(buf+i)) == (ENDHEADERMAGIC & 0xff)) && + ((*(buf+i+1)) == (ENDHEADERMAGIC >> 8 & 0xff)) && + ((*(buf+i+2)) == (ENDHEADERMAGIC >> 16 & 0xff)) && + ((*(buf+i+3)) == (ENDHEADERMAGIC >> 24 & 0xff))) + { + pos_found = read_pos+i; + break; + } + + if (pos_found != 0) + break; + } + + return pos_found; +} + +/* Locate the Central directory 64 of a zipfile (at the end, just before the global comment) */ +static uint64_t unzSearchCentralDir64(const zlib_filefunc64_32_def *pzlib_filefunc_def, voidpf filestream, + const uint64_t endcentraloffset) +{ + uint64_t offset = 0; + uint32_t value32 = 0; + + /* Zip64 end of central directory locator */ + if (ZSEEK64(*pzlib_filefunc_def, filestream, endcentraloffset - SIZECENTRALHEADERLOCATOR, ZLIB_FILEFUNC_SEEK_SET) != 0) + return 0; + + /* Read locator signature */ + if (unzReadUInt32(pzlib_filefunc_def, filestream, &value32) != UNZ_OK) + return 0; + if (value32 != ZIP64ENDLOCHEADERMAGIC) + return 0; + /* Number of the disk with the start of the zip64 end of central directory */ + if (unzReadUInt32(pzlib_filefunc_def, filestream, &value32) != UNZ_OK) + return 0; + /* Relative offset of the zip64 end of central directory record */ + if (unzReadUInt64(pzlib_filefunc_def, filestream, &offset) != UNZ_OK) + return 0; + /* Total number of disks */ + if (unzReadUInt32(pzlib_filefunc_def, filestream, &value32) != UNZ_OK) + return 0; + /* Goto end of central directory record */ + if (ZSEEK64(*pzlib_filefunc_def, filestream, offset, ZLIB_FILEFUNC_SEEK_SET) != 0) + return 0; + /* The signature */ + if (unzReadUInt32(pzlib_filefunc_def, filestream, &value32) != UNZ_OK) + return 0; + if (value32 != ZIP64ENDHEADERMAGIC) + return 0; + + return offset; +} + +static unzFile unzOpenInternal(const void *path, zlib_filefunc64_32_def *pzlib_filefunc64_32_def) +{ + unz64_s us; + unz64_s *s = NULL; + uint64_t central_pos = 0; + uint64_t central_pos64 = 0; + uint64_t number_entry_CD = 0; + uint16_t value16 = 0; + uint32_t value32 = 0; + uint64_t value64 = 0; + voidpf filestream = NULL; + int err = UNZ_OK; + + if (unz_copyright[0] != ' ') + return NULL; + + us.filestream = NULL; + us.filestream_with_CD = NULL; + us.z_filefunc.zseek32_file = NULL; + us.z_filefunc.ztell32_file = NULL; + + if (pzlib_filefunc64_32_def == NULL) + fill_fopen64_filefunc(&us.z_filefunc.zfile_func64); + else + us.z_filefunc = *pzlib_filefunc64_32_def; + + us.filestream = ZOPEN64(us.z_filefunc, path, ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING); + + if (us.filestream == NULL) + return NULL; + + us.filestream_with_CD = us.filestream; + us.is_zip64 = 0; + + /* Search for end of central directory header */ + central_pos = unzSearchCentralDir(&us.z_filefunc, us.filestream); + if (central_pos) + { + if (ZSEEK64(us.z_filefunc, us.filestream, central_pos, ZLIB_FILEFUNC_SEEK_SET) != 0) + err = UNZ_ERRNO; + + /* The signature, already checked */ + if (unzReadUInt32(&us.z_filefunc, us.filestream, &value32) != UNZ_OK) + err = UNZ_ERRNO; + /* Number of this disk */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + us.number_disk = value16; + /* Number of the disk with the start of the central directory */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + us.gi.number_disk_with_CD = value16; + /* Total number of entries in the central directory on this disk */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + us.gi.number_entry = value16; + /* Total number of entries in the central directory */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + number_entry_CD = value16; + if (number_entry_CD != us.gi.number_entry) + err = UNZ_BADZIPFILE; + /* Size of the central directory */ + if (unzReadUInt32(&us.z_filefunc, us.filestream, &value32) != UNZ_OK) + err = UNZ_ERRNO; + us.size_central_dir = value32; + /* Offset of start of central directory with respect to the starting disk number */ + if (unzReadUInt32(&us.z_filefunc, us.filestream, &value32) != UNZ_OK) + err = UNZ_ERRNO; + us.offset_central_dir = value32; + /* Zipfile comment length */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &us.gi.size_comment) != UNZ_OK) + err = UNZ_ERRNO; + + if (err == UNZ_OK) + { + /* Search for Zip64 end of central directory header */ + central_pos64 = unzSearchCentralDir64(&us.z_filefunc, us.filestream, central_pos); + if (central_pos64) + { + central_pos = central_pos64; + us.is_zip64 = 1; + + if (ZSEEK64(us.z_filefunc, us.filestream, central_pos, ZLIB_FILEFUNC_SEEK_SET) != 0) + err = UNZ_ERRNO; + + /* the signature, already checked */ + if (unzReadUInt32(&us.z_filefunc, us.filestream, &value32) != UNZ_OK) + err = UNZ_ERRNO; + /* size of zip64 end of central directory record */ + if (unzReadUInt64(&us.z_filefunc, us.filestream, &value64) != UNZ_OK) + err = UNZ_ERRNO; + /* version made by */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + /* version needed to extract */ + if (unzReadUInt16(&us.z_filefunc, us.filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + /* number of this disk */ + if (unzReadUInt32(&us.z_filefunc, us.filestream, &us.number_disk) != UNZ_OK) + err = UNZ_ERRNO; + /* number of the disk with the start of the central directory */ + if (unzReadUInt32(&us.z_filefunc, us.filestream, &us.gi.number_disk_with_CD) != UNZ_OK) + err = UNZ_ERRNO; + /* total number of entries in the central directory on this disk */ + if (unzReadUInt64(&us.z_filefunc, us.filestream, &us.gi.number_entry) != UNZ_OK) + err = UNZ_ERRNO; + /* total number of entries in the central directory */ + if (unzReadUInt64(&us.z_filefunc, us.filestream, &number_entry_CD) != UNZ_OK) + err = UNZ_ERRNO; + if (number_entry_CD != us.gi.number_entry) + err = UNZ_BADZIPFILE; + /* size of the central directory */ + if (unzReadUInt64(&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 (unzReadUInt64(&us.z_filefunc, us.filestream, &us.offset_central_dir) != UNZ_OK) + err = UNZ_ERRNO; + } + else if ((us.gi.number_entry == UINT16_MAX) || (us.size_central_dir == UINT16_MAX) || (us.offset_central_dir == UINT32_MAX)) + err = UNZ_BADZIPFILE; + } + } + else + err = UNZ_ERRNO; + + if ((err == UNZ_OK) && (central_pos < us.offset_central_dir + us.size_central_dir)) + err = UNZ_BADZIPFILE; + + if (err != UNZ_OK) + { + ZCLOSE64(us.z_filefunc, us.filestream); + return NULL; + } + + if (us.gi.number_disk_with_CD == 0) + { + /* If there is only one disk open another stream so we don't have to seek between the CD + and the file headers constantly */ + filestream = ZOPEN64(us.z_filefunc, path, ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING); + if (filestream != NULL) + us.filestream = filestream; + } + + /* Hack for zip files that have no respect for zip64 + if ((central_pos > 0xffffffff) && (us.offset_central_dir < 0xffffffff)) + us.offset_central_dir = central_pos - us.size_central_dir;*/ + + 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; + + s = (unz64_s*)ALLOC(sizeof(unz64_s)); + if (s != NULL) + { + *s = us; + unzGoToFirstFile((unzFile)s); + } + return (unzFile)s; +} + +extern unzFile ZEXPORT unzOpen2(const char *path, zlib_filefunc_def *pzlib_filefunc32_def) +{ + if (pzlib_filefunc32_def != NULL) + { + zlib_filefunc64_32_def zlib_filefunc64_32_def_fill; + fill_zlib_filefunc64_32_def_from_filefunc32(&zlib_filefunc64_32_def_fill, pzlib_filefunc32_def); + return unzOpenInternal(path, &zlib_filefunc64_32_def_fill); + } + return unzOpenInternal(path, NULL); +} + +extern unzFile ZEXPORT unzOpen2_64(const void *path, zlib_filefunc64_def *pzlib_filefunc_def) +{ + if (pzlib_filefunc_def != NULL) + { + zlib_filefunc64_32_def zlib_filefunc64_32_def_fill; + zlib_filefunc64_32_def_fill.zfile_func64 = *pzlib_filefunc_def; + zlib_filefunc64_32_def_fill.ztell32_file = NULL; + zlib_filefunc64_32_def_fill.zseek32_file = NULL; + return unzOpenInternal(path, &zlib_filefunc64_32_def_fill); + } + return unzOpenInternal(path, NULL); +} + +extern unzFile ZEXPORT unzOpen(const char *path) +{ + return unzOpenInternal(path, NULL); +} + +extern unzFile ZEXPORT unzOpen64(const void *path) +{ + return unzOpenInternal(path, NULL); +} + +extern int ZEXPORT unzClose(unzFile file) +{ + unz64_s *s; + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + if (s->pfile_in_zip_read != NULL) + unzCloseCurrentFile(file); + + if ((s->filestream != NULL) && (s->filestream != s->filestream_with_CD)) + ZCLOSE64(s->z_filefunc, s->filestream); + if (s->filestream_with_CD != NULL) + ZCLOSE64(s->z_filefunc, s->filestream_with_CD); + + s->filestream = NULL; + s->filestream_with_CD = NULL; + TRYFREE(s); + return UNZ_OK; +} + +/* Goto to the next available disk for spanned archives */ +static int unzGoToNextDisk(unzFile file) +{ + unz64_s *s; + uint32_t number_disk_next = 0; + + s = (unz64_s*)file; + if (s == NULL) + return UNZ_PARAMERROR; + number_disk_next = s->number_disk; + + if ((s->pfile_in_zip_read != NULL) && (s->pfile_in_zip_read->rest_read_uncompressed > 0)) + /* We are currently reading a file and we need the next sequential disk */ + number_disk_next += 1; + else + /* Goto the disk for the current file */ + number_disk_next = s->cur_file_info.disk_num_start; + + if (number_disk_next != s->number_disk) + { + /* Switch disks */ + if ((s->filestream != NULL) && (s->filestream != s->filestream_with_CD)) + ZCLOSE64(s->z_filefunc, s->filestream); + + if (number_disk_next == s->gi.number_disk_with_CD) + { + s->filestream = s->filestream_with_CD; + } + else + { + s->filestream = ZOPENDISK64(s->z_filefunc, s->filestream_with_CD, number_disk_next, + ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING); + } + + if (s->filestream == NULL) + return UNZ_ERRNO; + + s->number_disk = number_disk_next; + } + + return UNZ_OK; +} + +extern int ZEXPORT unzGetGlobalInfo(unzFile file, unz_global_info* pglobal_info32) +{ + unz64_s *s = NULL; + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + pglobal_info32->number_entry = (uint32_t)s->gi.number_entry; + pglobal_info32->size_comment = s->gi.size_comment; + pglobal_info32->number_disk_with_CD = s->gi.number_disk_with_CD; + return UNZ_OK; +} + +extern int ZEXPORT unzGetGlobalInfo64(unzFile file, unz_global_info64 *pglobal_info) +{ + unz64_s *s = NULL; + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + *pglobal_info = s->gi; + return UNZ_OK; +} + +extern int ZEXPORT unzGetGlobalComment(unzFile file, char *comment, uint16_t comment_size) +{ + unz64_s *s = NULL; + uint16_t bytes_to_read = comment_size; + if (file == NULL) + return (int)UNZ_PARAMERROR; + s = (unz64_s*)file; + + if (bytes_to_read > s->gi.size_comment) + bytes_to_read = s->gi.size_comment; + + if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, s->central_pos + 22, ZLIB_FILEFUNC_SEEK_SET) != 0) + return UNZ_ERRNO; + + if (bytes_to_read > 0) + { + *comment = 0; + if (ZREAD64(s->z_filefunc, s->filestream_with_CD, comment, bytes_to_read) != bytes_to_read) + return UNZ_ERRNO; + } + + if ((comment != NULL) && (comment_size > s->gi.size_comment)) + *(comment + s->gi.size_comment) = 0; + + return (int)bytes_to_read; +} + +static int unzGetCurrentFileInfoField(unzFile file, uint32_t *seek, void *field, uint16_t field_size, uint16_t size_file_field, int null_terminated_field) +{ + unz64_s *s = NULL; + uint32_t bytes_to_read = 0; + int err = UNZ_OK; + + if (file == NULL) + return (int)UNZ_PARAMERROR; + s = (unz64_s*)file; + + /* Read field */ + if (field != NULL) + { + if (size_file_field < field_size) + { + if (null_terminated_field) + *((char *)field+size_file_field) = 0; + + bytes_to_read = size_file_field; + } + else + bytes_to_read = field_size; + + if (*seek != 0) + { + if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, *seek, ZLIB_FILEFUNC_SEEK_CUR) == 0) + *seek = 0; + else + err = UNZ_ERRNO; + } + + if ((size_file_field > 0) && (field_size > 0)) + { + if (ZREAD64(s->z_filefunc, s->filestream_with_CD, field, bytes_to_read) != bytes_to_read) + err = UNZ_ERRNO; + } + *seek += size_file_field - bytes_to_read; + } + else + { + *seek += size_file_field; + } + + return err; +} + +/* Get info about the current file in the zipfile, with internal only info */ +static int unzGetCurrentFileInfoInternal(unzFile file, unz_file_info64 *pfile_info, + unz_file_info64_internal *pfile_info_internal, char *filename, uint16_t filename_size, void *extrafield, + uint16_t extrafield_size, char *comment, uint16_t comment_size) +{ + unz64_s *s = NULL; + unz_file_info64 file_info; + unz_file_info64_internal file_info_internal; + uint32_t magic = 0; + uint64_t current_pos = 0; + uint32_t seek = 0; + uint32_t extra_pos = 0; + uint16_t extra_header_id = 0; + uint16_t extra_data_size = 0; + uint16_t value16 = 0; + uint32_t value32 = 0; + uint64_t value64 = 0; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, + s->pos_in_central_dir + s->byte_before_the_zipfile, ZLIB_FILEFUNC_SEEK_SET) != 0) + err = UNZ_ERRNO; + + /* Check the magic */ + if (err == UNZ_OK) + { + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &magic) != UNZ_OK) + err = UNZ_ERRNO; + else if (magic != CENTRALHEADERMAGIC) + err = UNZ_BADZIPFILE; + } + + /* Read central directory header */ + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.version) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.version_needed) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.flag) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.compression_method) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &file_info.dos_date) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &file_info.crc) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &value32) != UNZ_OK) + err = UNZ_ERRNO; + file_info.compressed_size = value32; + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &value32) != UNZ_OK) + err = UNZ_ERRNO; + file_info.uncompressed_size = value32; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.size_filename) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.size_file_extra) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.size_file_comment) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &value16) != UNZ_OK) + err = UNZ_ERRNO; + file_info.disk_num_start = value16; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &file_info.internal_fa) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &file_info.external_fa) != UNZ_OK) + err = UNZ_ERRNO; + /* Relative offset of local header */ + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &value32) != UNZ_OK) + err = UNZ_ERRNO; + + file_info.size_file_extra_internal = 0; + file_info.disk_offset = value32; + file_info_internal.offset_curfile = value32; +#ifdef HAVE_AES + file_info_internal.aes_compression_method = 0; + file_info_internal.aes_encryption_mode = 0; + file_info_internal.aes_version = 0; +#endif + + if (err == UNZ_OK) + err = unzGetCurrentFileInfoField(file, &seek, filename, filename_size, file_info.size_filename, 1); + + /* Read extrafield */ + if (err == UNZ_OK) + err = unzGetCurrentFileInfoField(file, &seek, extrafield, extrafield_size, file_info.size_file_extra, 0); + + if ((err == UNZ_OK) && (file_info.size_file_extra != 0)) + { + if (seek != 0) + { + if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, seek, ZLIB_FILEFUNC_SEEK_CUR) == 0) + seek = 0; + else + err = UNZ_ERRNO; + } + + /* We are going to parse the extra field so we need to move back */ + current_pos = ZTELL64(s->z_filefunc, s->filestream_with_CD); + if (current_pos < file_info.size_file_extra) + err = UNZ_ERRNO; + current_pos -= file_info.size_file_extra; + if (ZSEEK64(s->z_filefunc, s->filestream_with_CD, current_pos, ZLIB_FILEFUNC_SEEK_SET) != 0) + err = UNZ_ERRNO; + + while ((err != UNZ_ERRNO) && (extra_pos < file_info.size_file_extra)) + { + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &extra_header_id) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &extra_data_size) != UNZ_OK) + err = UNZ_ERRNO; + + /* ZIP64 extra fields */ + if (extra_header_id == 0x0001) + { + /* Subtract size of ZIP64 field, since ZIP64 is handled internally */ + file_info.size_file_extra_internal += 2 + 2 + extra_data_size; + + if (file_info.uncompressed_size == UINT32_MAX) + { + if (unzReadUInt64(&s->z_filefunc, s->filestream_with_CD, &file_info.uncompressed_size) != UNZ_OK) + err = UNZ_ERRNO; + } + if (file_info.compressed_size == UINT32_MAX) + { + if (unzReadUInt64(&s->z_filefunc, s->filestream_with_CD, &file_info.compressed_size) != UNZ_OK) + err = UNZ_ERRNO; + } + if (file_info_internal.offset_curfile == UINT32_MAX) + { + /* Relative Header offset */ + if (unzReadUInt64(&s->z_filefunc, s->filestream_with_CD, &value64) != UNZ_OK) + err = UNZ_ERRNO; + file_info_internal.offset_curfile = value64; + file_info.disk_offset = value64; + } + if (file_info.disk_num_start == UINT32_MAX) + { + /* Disk Start Number */ + if (unzReadUInt32(&s->z_filefunc, s->filestream_with_CD, &file_info.disk_num_start) != UNZ_OK) + err = UNZ_ERRNO; + } + } +#ifdef HAVE_AES + /* AES header */ + else if (extra_header_id == 0x9901) + { + uint8_t value8 = 0; + + /* Subtract size of AES field, since AES is handled internally */ + file_info.size_file_extra_internal += 2 + 2 + extra_data_size; + + /* Verify version info */ + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &value16) != UNZ_OK) + err = UNZ_ERRNO; + /* Support AE-1 and AE-2 */ + if (value16 != 1 && value16 != 2) + err = UNZ_ERRNO; + file_info_internal.aes_version = value16; + if (unzReadUInt8(&s->z_filefunc, s->filestream_with_CD, &value8) != UNZ_OK) + err = UNZ_ERRNO; + if ((char)value8 != 'A') + err = UNZ_ERRNO; + if (unzReadUInt8(&s->z_filefunc, s->filestream_with_CD, &value8) != UNZ_OK) + err = UNZ_ERRNO; + if ((char)value8 != 'E') + err = UNZ_ERRNO; + /* Get AES encryption strength and actual compression method */ + if (unzReadUInt8(&s->z_filefunc, s->filestream_with_CD, &value8) != UNZ_OK) + err = UNZ_ERRNO; + file_info_internal.aes_encryption_mode = value8; + if (unzReadUInt16(&s->z_filefunc, s->filestream_with_CD, &value16) != UNZ_OK) + err = UNZ_ERRNO; + file_info_internal.aes_compression_method = value16; + } +#endif + else + { + if (ZSEEK64(s->z_filefunc, s->filestream_with_CD,extra_data_size, ZLIB_FILEFUNC_SEEK_CUR) != 0) + err = UNZ_ERRNO; + } + + extra_pos += 2 + 2 + extra_data_size; + } + } + + if (file_info.disk_num_start == s->gi.number_disk_with_CD) + file_info_internal.byte_before_the_zipfile = s->byte_before_the_zipfile; + else + file_info_internal.byte_before_the_zipfile = 0; + + if (err == UNZ_OK) + err = unzGetCurrentFileInfoField(file, &seek, comment, comment_size, file_info.size_file_comment, 1); + + 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; +} + +extern int ZEXPORT unzGetCurrentFileInfo(unzFile file, unz_file_info *pfile_info, char *filename, + uint16_t filename_size, void *extrafield, uint16_t extrafield_size, char *comment, uint16_t comment_size) +{ + unz_file_info64 file_info64; + int err = UNZ_OK; + + err = unzGetCurrentFileInfoInternal(file, &file_info64, NULL, filename, filename_size, + extrafield, extrafield_size, comment, comment_size); + + if ((err == UNZ_OK) && (pfile_info != NULL)) + { + pfile_info->version = file_info64.version; + pfile_info->version_needed = file_info64.version_needed; + pfile_info->flag = file_info64.flag; + pfile_info->compression_method = file_info64.compression_method; + pfile_info->dos_date = file_info64.dos_date; + pfile_info->crc = file_info64.crc; + + pfile_info->size_filename = file_info64.size_filename; + pfile_info->size_file_extra = file_info64.size_file_extra - file_info64.size_file_extra_internal; + pfile_info->size_file_comment = file_info64.size_file_comment; + + pfile_info->disk_num_start = (uint16_t)file_info64.disk_num_start; + pfile_info->internal_fa = file_info64.internal_fa; + pfile_info->external_fa = file_info64.external_fa; + + pfile_info->compressed_size = (uint32_t)file_info64.compressed_size; + pfile_info->uncompressed_size = (uint32_t)file_info64.uncompressed_size; + } + return err; +} + +extern int ZEXPORT unzGetCurrentFileInfo64(unzFile file, unz_file_info64 * pfile_info, char *filename, + uint16_t filename_size, void *extrafield, uint16_t extrafield_size, char *comment, uint16_t comment_size) +{ + return unzGetCurrentFileInfoInternal(file, pfile_info, NULL, filename, filename_size, + extrafield, extrafield_size, comment,comment_size); +} + +/* 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 unzCheckCurrentFileCoherencyHeader(unz64_s *s, uint32_t *psize_variable, uint64_t *poffset_local_extrafield, + uint16_t *psize_local_extrafield) +{ + uint32_t magic = 0; + uint16_t value16 = 0; + uint32_t value32 = 0; + uint32_t flags = 0; + uint16_t size_filename = 0; + uint16_t size_extra_field = 0; + uint16_t compression_method = 0; + int err = UNZ_OK; + + if (psize_variable == NULL) + return UNZ_PARAMERROR; + *psize_variable = 0; + if (poffset_local_extrafield == NULL) + return UNZ_PARAMERROR; + *poffset_local_extrafield = 0; + if (psize_local_extrafield == NULL) + return UNZ_PARAMERROR; + *psize_local_extrafield = 0; + + err = unzGoToNextDisk((unzFile)s); + if (err != UNZ_OK) + return err; + + if (ZSEEK64(s->z_filefunc, s->filestream, s->cur_file_info_internal.offset_curfile + + s->cur_file_info_internal.byte_before_the_zipfile, ZLIB_FILEFUNC_SEEK_SET) != 0) + return UNZ_ERRNO; + + if (err == UNZ_OK) + { + if (unzReadUInt32(&s->z_filefunc, s->filestream, &magic) != UNZ_OK) + err = UNZ_ERRNO; + else if (magic != LOCALHEADERMAGIC) + err = UNZ_BADZIPFILE; + } + + if (unzReadUInt16(&s->z_filefunc, s->filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + if (unzReadUInt16(&s->z_filefunc, s->filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + flags = value16; + if (unzReadUInt16(&s->z_filefunc, s->filestream, &value16) != UNZ_OK) + err = UNZ_ERRNO; + else if ((err == UNZ_OK) && (value16 != s->cur_file_info.compression_method)) + err = UNZ_BADZIPFILE; + + compression_method = s->cur_file_info.compression_method; +#ifdef HAVE_AES + if (compression_method == AES_METHOD) + compression_method = s->cur_file_info_internal.aes_compression_method; +#endif + + if ((err == UNZ_OK) && (compression_method != 0) && (compression_method != Z_DEFLATED)) + { +#ifdef HAVE_BZIP2 + if (compression_method != Z_BZIP2ED) +#endif + err = UNZ_BADZIPFILE; + } + + if (unzReadUInt32(&s->z_filefunc, s->filestream, &value32) != UNZ_OK) /* date/time */ + err = UNZ_ERRNO; + if (unzReadUInt32(&s->z_filefunc, s->filestream, &value32) != UNZ_OK) /* crc */ + err = UNZ_ERRNO; + else if ((err == UNZ_OK) && (value32 != s->cur_file_info.crc) && ((flags & 8) == 0)) + err = UNZ_BADZIPFILE; + if (unzReadUInt32(&s->z_filefunc, s->filestream, &value32) != UNZ_OK) /* size compr */ + err = UNZ_ERRNO; + else if ((value32 != UINT32_MAX) && (err == UNZ_OK) && (value32 != s->cur_file_info.compressed_size) && ((flags & 8) == 0)) + err = UNZ_BADZIPFILE; + if (unzReadUInt32(&s->z_filefunc, s->filestream, &value32) != UNZ_OK) /* size uncompr */ + err = UNZ_ERRNO; + else if ((value32 != UINT32_MAX) && (err == UNZ_OK) && (value32 != s->cur_file_info.uncompressed_size) && ((flags & 8) == 0)) + err = UNZ_BADZIPFILE; + if (unzReadUInt16(&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; + + *psize_variable += size_filename; + + if (unzReadUInt16(&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 = size_extra_field; + *psize_variable += 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) +{ + unz64_s *s = NULL; + file_in_zip64_read_info_s *pfile_in_zip_read_info = NULL; + uint16_t compression_method = 0; + uint64_t offset_local_extrafield = 0; + uint16_t size_local_extrafield = 0; + uint32_t size_variable = 0; + int err = UNZ_OK; +#ifndef NOUNCRYPT + char source[12]; +#else + if (password != NULL) + return UNZ_PARAMERROR; +#endif + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (!s->current_file_ok) + return UNZ_PARAMERROR; + + if (s->pfile_in_zip_read != NULL) + unzCloseCurrentFile(file); + + if (unzCheckCurrentFileCoherencyHeader(s, &size_variable, &offset_local_extrafield, &size_local_extrafield) != UNZ_OK) + return UNZ_BADZIPFILE; + + pfile_in_zip_read_info = (file_in_zip64_read_info_s*)ALLOC(sizeof(file_in_zip64_read_info_s)); + if (pfile_in_zip_read_info == NULL) + return UNZ_INTERNALERROR; + + pfile_in_zip_read_info->read_buffer = (uint8_t*)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; + + compression_method = s->cur_file_info.compression_method; +#ifdef HAVE_AES + if (compression_method == AES_METHOD) + { + compression_method = s->cur_file_info_internal.aes_compression_method; + if (password == NULL) + { + TRYFREE(pfile_in_zip_read_info); + return UNZ_PARAMERROR; + } + } +#endif + + if (method != NULL) + *method = 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 ((compression_method != 0) && (compression_method != Z_DEFLATED)) + { +#ifdef HAVE_BZIP2 + if (compression_method != Z_BZIP2ED) +#endif + { + TRYFREE(pfile_in_zip_read_info); + return 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->total_out_64 = 0; + pfile_in_zip_read_info->compression_method = compression_method; + pfile_in_zip_read_info->filestream = s->filestream; + pfile_in_zip_read_info->z_filefunc = s->z_filefunc; + if (s->number_disk == s->gi.number_disk_with_CD) + pfile_in_zip_read_info->byte_before_the_zipfile = s->byte_before_the_zipfile; + else + pfile_in_zip_read_info->byte_before_the_zipfile = 0; + pfile_in_zip_read_info->stream.total_out = 0; + pfile_in_zip_read_info->stream.total_in = 0; + pfile_in_zip_read_info->stream.next_in = NULL; + + if (!raw) + { + if (compression_method == Z_BZIP2ED) + { +#ifdef HAVE_BZIP2 + pfile_in_zip_read_info->bstream.bzalloc = (void *(*) (void *, int, int))0; + pfile_in_zip_read_info->bstream.bzfree = (free_func)0; + pfile_in_zip_read_info->bstream.opaque = (voidpf)0; + pfile_in_zip_read_info->bstream.state = (voidpf)0; + + 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 = BZ2_bzDecompressInit(&pfile_in_zip_read_info->bstream, 0, 0); + if (err == Z_OK) + { + pfile_in_zip_read_info->stream_initialised = Z_BZIP2ED; + } + else + { + TRYFREE(pfile_in_zip_read_info); + return err; + } +#else + pfile_in_zip_read_info->raw = 1; +#endif + } + else if (compression_method == Z_DEFLATED) + { + 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)s; + pfile_in_zip_read_info->stream.next_in = 0; + pfile_in_zip_read_info->stream.avail_in = 0; + +#ifdef HAVE_APPLE_COMPRESSION + err = compression_stream_init(&pfile_in_zip_read_info->astream, COMPRESSION_STREAM_DECODE, COMPRESSION_ZLIB); + if (err == COMPRESSION_STATUS_ERROR) + err = UNZ_INTERNALERROR; + else + err = Z_OK; +#else + err = inflateInit2(&pfile_in_zip_read_info->stream, -MAX_WBITS); +#endif + if (err == Z_OK) + { + pfile_in_zip_read_info->stream_initialised = Z_DEFLATED; + } + 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 + size_variable; + pfile_in_zip_read_info->stream.avail_in = 0; + + s->pfile_in_zip_read = pfile_in_zip_read_info; + +#ifndef NOUNCRYPT + s->pcrc_32_tab = NULL; + + if ((password != NULL) && ((s->cur_file_info.flag & 1) != 0)) + { + if (ZSEEK64(s->z_filefunc, s->filestream, + s->pfile_in_zip_read->pos_in_zipfile + s->pfile_in_zip_read->byte_before_the_zipfile, + ZLIB_FILEFUNC_SEEK_SET) != 0) + return UNZ_INTERNALERROR; +#ifdef HAVE_AES + if (s->cur_file_info.compression_method == AES_METHOD) + { + unsigned char passverify_archive[AES_PWVERIFYSIZE]; + unsigned char passverify_password[AES_PWVERIFYSIZE]; + unsigned char salt_value[AES_MAXSALTLENGTH]; + uint32_t salt_length = 0; + + if ((s->cur_file_info_internal.aes_encryption_mode < 1) || + (s->cur_file_info_internal.aes_encryption_mode > 3)) + return UNZ_INTERNALERROR; + + salt_length = SALT_LENGTH(s->cur_file_info_internal.aes_encryption_mode); + + if (ZREAD64(s->z_filefunc, s->filestream, salt_value, salt_length) != salt_length) + return UNZ_INTERNALERROR; + if (ZREAD64(s->z_filefunc, s->filestream, passverify_archive, AES_PWVERIFYSIZE) != AES_PWVERIFYSIZE) + return UNZ_INTERNALERROR; + + fcrypt_init(s->cur_file_info_internal.aes_encryption_mode, (uint8_t *)password, + (uint32_t)strlen(password), salt_value, passverify_password, &s->pfile_in_zip_read->aes_ctx); + + if (memcmp(passverify_archive, passverify_password, AES_PWVERIFYSIZE) != 0) + return UNZ_BADPASSWORD; + + s->pfile_in_zip_read->rest_read_compressed -= salt_length + AES_PWVERIFYSIZE; + s->pfile_in_zip_read->rest_read_compressed -= AES_AUTHCODESIZE; + + s->pfile_in_zip_read->pos_in_zipfile += salt_length + AES_PWVERIFYSIZE; + } + else +#endif + { + int i; + s->pcrc_32_tab = (const z_crc_t*)get_crc_table(); + init_keys(password, s->keys, s->pcrc_32_tab); + + if (ZREAD64(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->rest_read_compressed -= 12; + s->pfile_in_zip_read->pos_in_zipfile += 12; + } + } +#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 some 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, uint32_t len) +{ + unz64_s *s = NULL; + uint32_t read = 0; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + if (s->pfile_in_zip_read == NULL) + return UNZ_PARAMERROR; + if (s->pfile_in_zip_read->read_buffer == NULL) + return UNZ_END_OF_LIST_OF_FILE; + if (len == 0) + return 0; + if (len > UINT16_MAX) + return UNZ_PARAMERROR; + + s->pfile_in_zip_read->stream.next_out = (uint8_t*)buf; + s->pfile_in_zip_read->stream.avail_out = (uint16_t)len; + + if (s->pfile_in_zip_read->raw) + { + if (len > s->pfile_in_zip_read->rest_read_compressed + s->pfile_in_zip_read->stream.avail_in) + s->pfile_in_zip_read->stream.avail_out = (uint16_t)s->pfile_in_zip_read->rest_read_compressed + + s->pfile_in_zip_read->stream.avail_in; + } + else + { + if (len > s->pfile_in_zip_read->rest_read_uncompressed) + s->pfile_in_zip_read->stream.avail_out = (uint16_t)s->pfile_in_zip_read->rest_read_uncompressed; + } + + do + { + if (s->pfile_in_zip_read->stream.avail_in == 0) + { + uint32_t bytes_to_read = UNZ_BUFSIZE; + uint32_t bytes_not_read = 0; + uint32_t bytes_read = 0; + uint32_t total_bytes_read = 0; + + if (s->pfile_in_zip_read->stream.next_in != NULL) + bytes_not_read = (uint32_t)(s->pfile_in_zip_read->read_buffer + UNZ_BUFSIZE - + s->pfile_in_zip_read->stream.next_in); + bytes_to_read -= bytes_not_read; + if (bytes_not_read > 0) + memcpy(s->pfile_in_zip_read->read_buffer, s->pfile_in_zip_read->stream.next_in, bytes_not_read); + if (s->pfile_in_zip_read->rest_read_compressed < bytes_to_read) + bytes_to_read = (uint16_t)s->pfile_in_zip_read->rest_read_compressed; + + while (total_bytes_read != bytes_to_read) + { + if (ZSEEK64(s->pfile_in_zip_read->z_filefunc, s->pfile_in_zip_read->filestream, + s->pfile_in_zip_read->pos_in_zipfile + s->pfile_in_zip_read->byte_before_the_zipfile, + ZLIB_FILEFUNC_SEEK_SET) != 0) + return UNZ_ERRNO; + + bytes_read = ZREAD64(s->pfile_in_zip_read->z_filefunc, s->pfile_in_zip_read->filestream, + s->pfile_in_zip_read->read_buffer + bytes_not_read + total_bytes_read, + bytes_to_read - total_bytes_read); + + total_bytes_read += bytes_read; + s->pfile_in_zip_read->pos_in_zipfile += bytes_read; + + if (bytes_read == 0) + { + if (ZERROR64(s->pfile_in_zip_read->z_filefunc, s->pfile_in_zip_read->filestream)) + return UNZ_ERRNO; + + err = unzGoToNextDisk(file); + if (err != UNZ_OK) + return err; + + s->pfile_in_zip_read->pos_in_zipfile = 0; + s->pfile_in_zip_read->filestream = s->filestream; + } + } + +#ifndef NOUNCRYPT + if ((s->cur_file_info.flag & 1) != 0) + { +#ifdef HAVE_AES + if (s->cur_file_info.compression_method == AES_METHOD) + { + fcrypt_decrypt(s->pfile_in_zip_read->read_buffer, bytes_to_read, &s->pfile_in_zip_read->aes_ctx); + } + else +#endif + if (s->pcrc_32_tab != NULL) + { + uint32_t i = 0; + + for (i = 0; i < total_bytes_read; i++) + s->pfile_in_zip_read->read_buffer[i] = + zdecode(s->keys, s->pcrc_32_tab, s->pfile_in_zip_read->read_buffer[i]); + } + } +#endif + + s->pfile_in_zip_read->rest_read_compressed -= total_bytes_read; + s->pfile_in_zip_read->stream.next_in = (uint8_t*)s->pfile_in_zip_read->read_buffer; + s->pfile_in_zip_read->stream.avail_in = (uint16_t)(bytes_not_read + total_bytes_read); + } + + if ((s->pfile_in_zip_read->compression_method == 0) || (s->pfile_in_zip_read->raw)) + { + uint32_t i = 0; + uint32_t copy = 0; + + if ((s->pfile_in_zip_read->stream.avail_in == 0) && + (s->pfile_in_zip_read->rest_read_compressed == 0)) + return (read == 0) ? UNZ_EOF : read; + + if (s->pfile_in_zip_read->stream.avail_out < s->pfile_in_zip_read->stream.avail_in) + copy = s->pfile_in_zip_read->stream.avail_out; + else + copy = s->pfile_in_zip_read->stream.avail_in; + + for (i = 0; i < copy; i++) + *(s->pfile_in_zip_read->stream.next_out + i) = + *(s->pfile_in_zip_read->stream.next_in + i); + + s->pfile_in_zip_read->total_out_64 = s->pfile_in_zip_read->total_out_64 + copy; + s->pfile_in_zip_read->rest_read_uncompressed -= copy; + s->pfile_in_zip_read->crc32 = (uint32_t)crc32(s->pfile_in_zip_read->crc32, + s->pfile_in_zip_read->stream.next_out, copy); + + s->pfile_in_zip_read->stream.avail_in -= copy; + s->pfile_in_zip_read->stream.avail_out -= copy; + s->pfile_in_zip_read->stream.next_out += copy; + s->pfile_in_zip_read->stream.next_in += copy; + s->pfile_in_zip_read->stream.total_out += copy; + + read += copy; + } + else if (s->pfile_in_zip_read->compression_method == Z_BZIP2ED) + { +#ifdef HAVE_BZIP2 + uint64_t total_out_before = 0; + uint64_t total_out_after = 0; + uint64_t out_bytes = 0; + const uint8_t *buf_before = NULL; + + s->pfile_in_zip_read->bstream.next_in = (char*)s->pfile_in_zip_read->stream.next_in; + s->pfile_in_zip_read->bstream.avail_in = s->pfile_in_zip_read->stream.avail_in; + s->pfile_in_zip_read->bstream.total_in_lo32 = (uint32_t)s->pfile_in_zip_read->stream.total_in; + s->pfile_in_zip_read->bstream.total_in_hi32 = s->pfile_in_zip_read->stream.total_in >> 32; + + s->pfile_in_zip_read->bstream.next_out = (char*)s->pfile_in_zip_read->stream.next_out; + s->pfile_in_zip_read->bstream.avail_out = s->pfile_in_zip_read->stream.avail_out; + s->pfile_in_zip_read->bstream.total_out_lo32 = (uint32_t)s->pfile_in_zip_read->stream.total_out; + s->pfile_in_zip_read->bstream.total_out_hi32 = s->pfile_in_zip_read->stream.total_out >> 32; + + total_out_before = s->pfile_in_zip_read->bstream.total_out_lo32 + + (((uint32_t)s->pfile_in_zip_read->bstream.total_out_hi32) << 32); + buf_before = (const uint8_t*)s->pfile_in_zip_read->bstream.next_out; + + err = BZ2_bzDecompress(&s->pfile_in_zip_read->bstream); + + total_out_after = s->pfile_in_zip_read->bstream.total_out_lo32 + + (((uint32_t)s->pfile_in_zip_read->bstream.total_out_hi32) << 32); + + out_bytes = total_out_after - total_out_before; + + s->pfile_in_zip_read->total_out_64 = s->pfile_in_zip_read->total_out_64 + out_bytes; + s->pfile_in_zip_read->rest_read_uncompressed -= out_bytes; + s->pfile_in_zip_read->crc32 = crc32(s->pfile_in_zip_read->crc32, buf_before, (uint32_t)out_bytes); + + read += (uint32_t)out_bytes; + + s->pfile_in_zip_read->stream.next_in = (uint8_t*)s->pfile_in_zip_read->bstream.next_in; + s->pfile_in_zip_read->stream.avail_in = s->pfile_in_zip_read->bstream.avail_in; + s->pfile_in_zip_read->stream.total_in = s->pfile_in_zip_read->bstream.total_in_lo32; + s->pfile_in_zip_read->stream.next_out = (uint8_t*)s->pfile_in_zip_read->bstream.next_out; + s->pfile_in_zip_read->stream.avail_out = s->pfile_in_zip_read->bstream.avail_out; + s->pfile_in_zip_read->stream.total_out = s->pfile_in_zip_read->bstream.total_out_lo32; + + if (err == BZ_STREAM_END) + return (read == 0) ? UNZ_EOF : read; + if (err != BZ_OK) + break; +#endif + } +#ifdef HAVE_APPLE_COMPRESSION + else + { + uint64_t total_out_before = 0; + uint64_t total_out_after = 0; + uint64_t out_bytes = 0; + const uint8_t *buf_before = NULL; + + s->pfile_in_zip_read->astream.src_ptr = s->pfile_in_zip_read->stream.next_in; + s->pfile_in_zip_read->astream.src_size = s->pfile_in_zip_read->stream.avail_in; + s->pfile_in_zip_read->astream.dst_ptr = s->pfile_in_zip_read->stream.next_out; + s->pfile_in_zip_read->astream.dst_size = len; + + total_out_before = s->pfile_in_zip_read->stream.total_out; + buf_before = s->pfile_in_zip_read->stream.next_out; + + compression_status status; + compression_stream_flags flags; + + if (s->pfile_in_zip_read->stream.avail_in == 0) + { + flags = COMPRESSION_STREAM_FINALIZE; + } + + status = compression_stream_process(&s->pfile_in_zip_read->astream, flags); + + total_out_after = len - s->pfile_in_zip_read->astream.dst_size; + out_bytes = total_out_after - total_out_before; + + s->pfile_in_zip_read->total_out_64 += out_bytes; + s->pfile_in_zip_read->rest_read_uncompressed -= out_bytes; + s->pfile_in_zip_read->crc32 = + crc32(s->pfile_in_zip_read->crc32, buf_before, (uint32_t)out_bytes); + + read += (uint32_t)out_bytes; + + s->pfile_in_zip_read->stream.next_in = s->pfile_in_zip_read->astream.src_ptr; + s->pfile_in_zip_read->stream.avail_in = s->pfile_in_zip_read->astream.src_size; + s->pfile_in_zip_read->stream.next_out = s->pfile_in_zip_read->astream.dst_ptr; + s->pfile_in_zip_read->stream.avail_out = s->pfile_in_zip_read->astream.dst_size; + + if (status == COMPRESSION_STATUS_END) + return (read == 0) ? UNZ_EOF : read; + if (status == COMPRESSION_STATUS_ERROR) + return Z_DATA_ERROR; + return read; + } +#else + else + { + uint64_t total_out_before = 0; + uint64_t total_out_after = 0; + uint64_t out_bytes = 0; + const uint8_t *buf_before = NULL; + int flush = Z_SYNC_FLUSH; + + total_out_before = s->pfile_in_zip_read->stream.total_out; + buf_before = s->pfile_in_zip_read->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(&s->pfile_in_zip_read->stream, flush); + + if ((err >= 0) && (s->pfile_in_zip_read->stream.msg != NULL)) + err = Z_DATA_ERROR; + + total_out_after = s->pfile_in_zip_read->stream.total_out; + out_bytes = total_out_after - total_out_before; + + s->pfile_in_zip_read->total_out_64 += out_bytes; + s->pfile_in_zip_read->rest_read_uncompressed -= out_bytes; + s->pfile_in_zip_read->crc32 = + (uint32_t)crc32(s->pfile_in_zip_read->crc32,buf_before, (uint32_t)out_bytes); + + read += (uint32_t)out_bytes; + + if (err == Z_STREAM_END) + return (read == 0) ? UNZ_EOF : read; + if (err != Z_OK) + break; + } +#endif + } + while (s->pfile_in_zip_read->stream.avail_out > 0); + + if (err == Z_OK) + return read; + return err; +} + +extern int ZEXPORT unzGetLocalExtrafield(unzFile file, voidp buf, uint32_t len) +{ + unz64_s *s = NULL; + uint64_t size_to_read = 0; + uint32_t read_now = 0; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (s->pfile_in_zip_read == NULL) + return UNZ_PARAMERROR; + + size_to_read = s->pfile_in_zip_read->size_local_extrafield - s->pfile_in_zip_read->pos_local_extrafield; + + if (buf == NULL) + return (int)size_to_read; + + if (len > size_to_read) + read_now = (uint32_t)size_to_read; + else + read_now = len; + + if (read_now == 0) + return 0; + + if (ZSEEK64(s->pfile_in_zip_read->z_filefunc, s->pfile_in_zip_read->filestream, + s->pfile_in_zip_read->offset_local_extrafield + s->pfile_in_zip_read->pos_local_extrafield, + ZLIB_FILEFUNC_SEEK_SET) != 0) + return UNZ_ERRNO; + + if (ZREAD64(s->pfile_in_zip_read->z_filefunc, s->pfile_in_zip_read->filestream, buf, read_now) != read_now) + return UNZ_ERRNO; + + return (int)read_now; +} + +extern int ZEXPORT unzCloseCurrentFile(unzFile file) +{ + unz64_s *s = NULL; + file_in_zip64_read_info_s *pfile_in_zip_read_info = NULL; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + pfile_in_zip_read_info = s->pfile_in_zip_read; + if (pfile_in_zip_read_info == NULL) + return UNZ_PARAMERROR; + +#ifdef HAVE_AES + if (s->cur_file_info.compression_method == AES_METHOD) + { + unsigned char authcode[AES_AUTHCODESIZE]; + unsigned char rauthcode[AES_AUTHCODESIZE]; + + if (ZREAD64(s->z_filefunc, s->filestream, authcode, AES_AUTHCODESIZE) != AES_AUTHCODESIZE) + return UNZ_ERRNO; + + if (fcrypt_end(rauthcode, &s->pfile_in_zip_read->aes_ctx) != AES_AUTHCODESIZE) + err = UNZ_CRCERROR; + if (memcmp(authcode, rauthcode, AES_AUTHCODESIZE) != 0) + err = UNZ_CRCERROR; + } + /* AES zip version AE-1 will expect a valid crc as well */ + if ((s->cur_file_info.compression_method != AES_METHOD) || + (s->cur_file_info_internal.aes_version == 0x0001)) +#endif + { + 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 == Z_DEFLATED) + { +#ifdef HAVE_APPLE_COMPRESSION + if (compression_stream_destroy) + compression_stream_destroy(&pfile_in_zip_read_info->astream); +#else + inflateEnd(&pfile_in_zip_read_info->stream); +#endif + + } +#ifdef HAVE_BZIP2 + else if (pfile_in_zip_read_info->stream_initialised == Z_BZIP2ED) + BZ2_bzDecompressEnd(&pfile_in_zip_read_info->bstream); +#endif + + pfile_in_zip_read_info->stream_initialised = 0; + TRYFREE(pfile_in_zip_read_info); + + s->pfile_in_zip_read = NULL; + + return err; +} + +extern int ZEXPORT unzGoToFirstFile2(unzFile file, unz_file_info64 *pfile_info, char *filename, + uint16_t filename_size, void *extrafield, uint16_t extrafield_size, char *comment, uint16_t comment_size) +{ + unz64_s *s = NULL; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + s->pos_in_central_dir = s->offset_central_dir; + s->num_file = 0; + + err = unzGetCurrentFileInfoInternal(file, &s->cur_file_info, &s->cur_file_info_internal, + filename, filename_size, extrafield, extrafield_size, comment,comment_size); + + s->current_file_ok = (err == UNZ_OK); + if ((err == UNZ_OK) && (pfile_info != NULL)) + memcpy(pfile_info, &s->cur_file_info, sizeof(unz_file_info64)); + + return err; +} + +extern int ZEXPORT unzGoToFirstFile(unzFile file) +{ + return unzGoToFirstFile2(file, NULL, NULL, 0, NULL, 0, NULL, 0); +} + +extern int ZEXPORT unzGoToNextFile2(unzFile file, unz_file_info64 *pfile_info, char *filename, + uint16_t filename_size, void *extrafield, uint16_t extrafield_size, char *comment, uint16_t comment_size) +{ + unz64_s *s = NULL; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + if (!s->current_file_ok) + return UNZ_END_OF_LIST_OF_FILE; + if (s->gi.number_entry != UINT16_MAX) /* 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 += 1; + + err = unzGetCurrentFileInfoInternal(file, &s->cur_file_info, &s->cur_file_info_internal, + filename, filename_size, extrafield,extrafield_size, comment, comment_size); + + s->current_file_ok = (err == UNZ_OK); + if ((err == UNZ_OK) && (pfile_info != NULL)) + memcpy(pfile_info, &s->cur_file_info, sizeof(unz_file_info64)); + + return err; +} + +extern int ZEXPORT unzGoToNextFile(unzFile file) +{ + return unzGoToNextFile2(file, NULL, NULL, 0, NULL, 0, NULL, 0); +} + +extern int ZEXPORT unzLocateFile(unzFile file, const char *filename, unzFileNameComparer filename_compare_func) +{ + unz64_s *s = NULL; + unz_file_info64 cur_file_info_saved; + unz_file_info64_internal cur_file_info_internal_saved; + uint64_t num_file_saved = 0; + uint64_t pos_in_central_dir_saved = 0; + char current_filename[UNZ_MAXFILENAMEINZIP+1]; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + if (strlen(filename) >= UNZ_MAXFILENAMEINZIP) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (!s->current_file_ok) + return UNZ_END_OF_LIST_OF_FILE; + + /* Save the current state */ + num_file_saved = s->num_file; + pos_in_central_dir_saved = s->pos_in_central_dir; + cur_file_info_saved = s->cur_file_info; + cur_file_info_internal_saved = s->cur_file_info_internal; + + err = unzGoToFirstFile2(file, NULL, current_filename, sizeof(current_filename)-1, NULL, 0, NULL, 0); + + while (err == UNZ_OK) + { + if (filename_compare_func != NULL) + err = filename_compare_func(file, current_filename, filename); + else + err = strcmp(current_filename, filename); + if (err == 0) + return UNZ_OK; + err = unzGoToNextFile2(file, NULL, current_filename, sizeof(current_filename)-1, NULL, 0, NULL, 0); + } + + /* We failed, so restore the state of the 'current file' to where we were. */ + s->num_file = num_file_saved; + s->pos_in_central_dir = pos_in_central_dir_saved; + s->cur_file_info = cur_file_info_saved; + s->cur_file_info_internal = cur_file_info_internal_saved; + return err; +} + +extern int ZEXPORT unzGetFilePos(unzFile file, unz_file_pos *file_pos) +{ + unz64_file_pos file_pos64; + int err = unzGetFilePos64(file, &file_pos64); + if (err == UNZ_OK) + { + file_pos->pos_in_zip_directory = (uint32_t)file_pos64.pos_in_zip_directory; + file_pos->num_of_file = (uint32_t)file_pos64.num_of_file; + } + return err; +} + +extern int ZEXPORT unzGoToFilePos(unzFile file, unz_file_pos *file_pos) +{ + unz64_file_pos file_pos64; + if (file_pos == NULL) + return UNZ_PARAMERROR; + file_pos64.pos_in_zip_directory = file_pos->pos_in_zip_directory; + file_pos64.num_of_file = file_pos->num_of_file; + return unzGoToFilePos64(file, &file_pos64); +} + +extern int ZEXPORT unzGetFilePos64(unzFile file, unz64_file_pos *file_pos) +{ + unz64_s *s = NULL; + + if (file == NULL || file_pos == NULL) + return UNZ_PARAMERROR; + s = (unz64_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 unzGoToFilePos64(unzFile file, const unz64_file_pos *file_pos) +{ + unz64_s *s = NULL; + int err = UNZ_OK; + + if (file == NULL || file_pos == NULL) + return UNZ_PARAMERROR; + s = (unz64_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 = unzGetCurrentFileInfoInternal(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; +} + +extern int32_t ZEXPORT unzGetOffset(unzFile file) +{ + uint64_t offset64 = 0; + + if (file == NULL) + return UNZ_PARAMERROR; + offset64 = unzGetOffset64(file); + return (int32_t)offset64; +} + +extern int64_t ZEXPORT unzGetOffset64(unzFile file) +{ + unz64_s *s = NULL; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (!s->current_file_ok) + return 0; + if (s->gi.number_entry != 0 && s->gi.number_entry != UINT16_MAX) + { + if (s->num_file == s->gi.number_entry) + return 0; + } + return s->pos_in_central_dir; +} + +extern int ZEXPORT unzSetOffset(unzFile file, uint32_t pos) +{ + return unzSetOffset64(file, pos); +} + +extern int ZEXPORT unzSetOffset64(unzFile file, uint64_t pos) +{ + unz64_s *s = NULL; + int err = UNZ_OK; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + s->pos_in_central_dir = pos; + s->num_file = s->gi.number_entry; /* hack */ + + err = unzGetCurrentFileInfoInternal(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 int32_t ZEXPORT unzTell(unzFile file) +{ + unz64_s *s = NULL; + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (s->pfile_in_zip_read == NULL) + return UNZ_PARAMERROR; + return (int32_t)s->pfile_in_zip_read->stream.total_out; +} + +extern int64_t ZEXPORT unzTell64(unzFile file) +{ + unz64_s *s = NULL; + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (s->pfile_in_zip_read == NULL) + return UNZ_PARAMERROR; + return s->pfile_in_zip_read->total_out_64; +} + +extern int ZEXPORT unzSeek(unzFile file, uint32_t offset, int origin) +{ + return unzSeek64(file, offset, origin); +} + +extern int ZEXPORT unzSeek64(unzFile file, uint64_t offset, int origin) +{ + unz64_s *s = NULL; + uint64_t stream_pos_begin = 0; + uint64_t stream_pos_end = 0; + uint64_t position = 0; + int is_within_buffer = 0; + + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + + if (s->pfile_in_zip_read == NULL) + return UNZ_ERRNO; + if (s->pfile_in_zip_read->compression_method != 0) + return UNZ_ERRNO; + + if (origin == SEEK_SET) + position = offset; + else if (origin == SEEK_CUR) + position = s->pfile_in_zip_read->total_out_64 + offset; + else if (origin == SEEK_END) + position = s->cur_file_info.compressed_size + offset; + else + return UNZ_PARAMERROR; + + if (position > s->cur_file_info.compressed_size) + return UNZ_PARAMERROR; + + stream_pos_end = s->pfile_in_zip_read->pos_in_zipfile; + stream_pos_begin = stream_pos_end; + + if (stream_pos_begin > UNZ_BUFSIZE) + stream_pos_begin -= UNZ_BUFSIZE; + else + stream_pos_begin = 0; + + is_within_buffer = + (s->pfile_in_zip_read->stream.avail_in != 0) && + (s->pfile_in_zip_read->rest_read_compressed != 0 || s->cur_file_info.compressed_size < UNZ_BUFSIZE) && + (position >= stream_pos_begin && position < stream_pos_end); + + if (is_within_buffer) + { + s->pfile_in_zip_read->stream.next_in += position - s->pfile_in_zip_read->total_out_64; + s->pfile_in_zip_read->stream.avail_in = (uInt)(stream_pos_end - position); + } + else + { + s->pfile_in_zip_read->stream.avail_in = 0; + s->pfile_in_zip_read->stream.next_in = 0; + + s->pfile_in_zip_read->pos_in_zipfile = s->pfile_in_zip_read->offset_local_extrafield + position; + s->pfile_in_zip_read->rest_read_compressed = s->cur_file_info.compressed_size - position; + } + + s->pfile_in_zip_read->rest_read_uncompressed -= (position - s->pfile_in_zip_read->total_out_64); + s->pfile_in_zip_read->stream.total_out = (uint32_t)position; + s->pfile_in_zip_read->total_out_64 = position; + + return UNZ_OK; +} + +extern int ZEXPORT unzEndOfFile(unzFile file) +{ + unz64_s *s = NULL; + if (file == NULL) + return UNZ_PARAMERROR; + s = (unz64_s*)file; + if (s->pfile_in_zip_read == NULL) + return UNZ_PARAMERROR; + if (s->pfile_in_zip_read->rest_read_uncompressed == 0) + return 1; + return 0; +} + +#ifdef _WIN32 +# pragma warning(pop) +#endif // _WIN32
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