API to access ZIP archives. More...

#include "platform.h"
#include <ctype.h>
#include "extractor.h"
#include "unzip.h"

Include dependency graph for unzip.c:

Data Structures
struct	FileFuncDefs

struct	GlobalInfo

struct	UnzipFileInfoInternal

struct	FileInZipReadInfo

struct	EXTRACTOR_UnzipFile

Macros
#define	CASESENSITIVITY (0)

#define	MAXFILENAME (256)

#define	UNZ_BUFSIZE (16384)

#define	UNZ_MAXFILENAMEINZIP (256)

#define	SIZECENTRALDIRITEM (0x2e)

#define	SIZEZIPLOCALHEADER (0x1e)

#define	ZREAD(filefunc, buf, size)

#define	ZTELL(filefunc) ((*((filefunc).ztell_file))((filefunc).opaque))

#define	ZSEEK(filefunc, pos, mode)

#define	CASESENSITIVITYDEFAULT_NO

#define	CASESENSITIVITYDEFAULTVALUE 2

#define	BUFREADCOMMENT (0x400)

Functions
static int	read_byte_from_ffd (const struct FileFuncDefs ffd, int pi)

static int	read_short_from_ffd (const struct FileFuncDefs ffd, uLong pX)

static int	read_long_from_ffd (const struct FileFuncDefs ffd, uLong pX)

static int	EXTRACTOR_common_unzip_string_file_name_compare (const char fileName1, const char fileName2, int iCaseSensitivity)

static uLong	locate_central_directory (const struct FileFuncDefs *ffd)

static void	dos_date_to_tmu_date (uLong ulDosDate, struct EXTRACTOR_UnzipDateTimeInfo *ptm)

static int	get_current_file_info (struct EXTRACTOR_UnzipFile file, struct EXTRACTOR_UnzipFileInfo pfile_info, struct UnzipFileInfoInternal pfile_info_internal, char szFileName, uLong fileNameBufferSize, void extraField, uLong extraFieldBufferSize, char szComment, uLong commentBufferSize)

int	EXTRACTOR_common_unzip_go_to_first_file (struct EXTRACTOR_UnzipFile *file)

static struct EXTRACTOR_UnzipFile *	unzip_open_using_ffd (struct FileFuncDefs *ffd)

int	EXTRACTOR_common_unzip_close_current_file (struct EXTRACTOR_UnzipFile *file)

int	EXTRACTOR_common_unzip_close (struct EXTRACTOR_UnzipFile *file)

int	EXTRACTOR_common_unzip_get_global_comment (struct EXTRACTOR_UnzipFile file, char comment, size_t comment_len)

int	EXTRACTOR_common_unzip_get_current_file_info (struct EXTRACTOR_UnzipFile file, struct EXTRACTOR_UnzipFileInfo pfile_info, char szFileName, uLong fileNameBufferSize, void extraField, uLong extraFieldBufferSize, char *szComment, uLong commentBufferSize)

int	EXTRACTOR_common_unzip_go_to_next_file (struct EXTRACTOR_UnzipFile *file)

int	EXTRACTOR_common_unzip_go_find_local_file (struct EXTRACTOR_UnzipFile file, const char szFileName, int iCaseSensitivity)

ssize_t	EXTRACTOR_common_unzip_read_current_file (struct EXTRACTOR_UnzipFile file, void buf, size_t len)

static int	parse_current_file_coherency_header (struct EXTRACTOR_UnzipFile file, uInt piSizeVar, uLong poffset_local_extrafield, uInt psize_local_extrafield)

int	EXTRACTOR_common_unzip_open_current_file (struct EXTRACTOR_UnzipFile *file)

static uLong	ec_read_file_func (voidpf opaque, void *buf, uLong size)

static long	ec_tell_file_func (voidpf opaque)

static long	ec_seek_file_func (voidpf opaque, uLong offset, int origin)

struct EXTRACTOR_UnzipFile *	EXTRACTOR_common_unzip_open (struct EXTRACTOR_ExtractContext *ec)

Detailed Description

API to access ZIP archives.

Author: Christian Grothoff

The filenames for each file in a zipfile are stored in two locations. There is one at the start of each entry, just before the compressed data, and another at the end in a 'central directory structure'.

In order to catch self-extracting executables, we scan backwards from the end of the file looking for the central directory structure. The previous version of this went forewards through the local headers, but that only works for plain vanilla zip's and I don't feel like writing a special case for each of the dozen self-extracting executable stubs.

This assumes that the zip file is considered to be non-corrupt/non-truncated. If it is truncated then it's not considered to be a zip and skipped.

ZIP format description from appnote.iz and appnote.txt (more or less):

(this is why you always need to put in the last floppy if you span disks)

0- 3 end of central dir signature 4 bytes (0x06054b50) P K ^E ^F 4- 5 number of this disk 2 bytes 6- 7 number of the disk with the start of the central directory 2 bytes 8- 9 total number of entries in the central dir on this disk 2 bytes 10-11 total number of entries in the central dir 2 bytes 12-15 size of the central directory 4 bytes 16-19 offset of start of central directory with respect to the starting disk number 4 bytes 20-21 zipfile comment length 2 bytes 22-?? zipfile comment (variable size) max length 65536 bytes

Definition in file unzip.c.

Macro Definition Documentation

◆ BUFREADCOMMENT

#define BUFREADCOMMENT (0x400)

Definition at line 454 of file unzip.c.

◆ CASESENSITIVITY

#define CASESENSITIVITY (0)

Definition at line 67 of file unzip.c.

◆ CASESENSITIVITYDEFAULT_NO

#define CASESENSITIVITYDEFAULT_NO

Definition at line 419 of file unzip.c.

◆ CASESENSITIVITYDEFAULTVALUE

#define CASESENSITIVITYDEFAULTVALUE 2

Definition at line 424 of file unzip.c.

◆ MAXFILENAME

#define MAXFILENAME (256)

Definition at line 68 of file unzip.c.

◆ SIZECENTRALDIRITEM

#define SIZECENTRALDIRITEM (0x2e)

Definition at line 78 of file unzip.c.

◆ SIZEZIPLOCALHEADER

#define SIZEZIPLOCALHEADER (0x1e)

Definition at line 79 of file unzip.c.

◆ UNZ_BUFSIZE

#define UNZ_BUFSIZE (16384)

Definition at line 71 of file unzip.c.

◆ UNZ_MAXFILENAMEINZIP

#define UNZ_MAXFILENAMEINZIP (256)

Definition at line 75 of file unzip.c.

◆ ZREAD

#define ZREAD	(	filefunc,
		buf,
		size
	)

Value:

((*((filefunc).zread_file))((filefunc).opaque, \

buf, size))

Macro to read using filefunc API.

Parameters

filefunc	filefunc struct
buf	where to write data
size	number of bytes to read

Returns: number of bytes copied to buf

Definition at line 117 of file unzip.c.

◆ ZSEEK

#define ZSEEK	(	filefunc,
		pos,
		mode
	)

Value:

((*((filefunc).zseek_file))((filefunc).opaque, \

pos, mode))

Macro to seek using filefunc API.

Parameters

filefunc	filefunc struct
pos	position to seek
mode	seek mode

Returns: 0 on success

Definition at line 136 of file unzip.c.

◆ ZTELL

#define ZTELL ( filefunc ) ((*((filefunc).ztell_file))((filefunc).opaque))

Macro to obtain current offset in file using filefunc API.

Parameters

filefunc filefunc struct

Returns: current offset in file

Definition at line 126 of file unzip.c.

Function Documentation

◆ dos_date_to_tmu_date()

static void dos_date_to_tmu_date	(	uLong	ulDosDate,
		struct EXTRACTOR_UnzipDateTimeInfo *	ptm
	)

static

Translate date/time from Dos format to struct EXTRACTOR_UnzipDateTimeInfo (readable more easilty)

Parameters

ulDosDate	time in DOS format (input)
ptm	where to write time in readable format

Definition at line 516 of file unzip.c.

References EXTRACTOR_UnzipDateTimeInfo::tm_hour, EXTRACTOR_UnzipDateTimeInfo::tm_mday, EXTRACTOR_UnzipDateTimeInfo::tm_min, EXTRACTOR_UnzipDateTimeInfo::tm_mon, EXTRACTOR_UnzipDateTimeInfo::tm_sec, and EXTRACTOR_UnzipDateTimeInfo::tm_year.

Referenced by get_current_file_info().

◆ ec_read_file_func()

static uLong ec_read_file_func	(	voidpf	opaque,
		void *	buf,
		uLong	size
	)

static

Callback to perform read operation using LE API. Note that partial reads are not allowed.

Parameters

opaque	the 'struct EXTRACTOR_ExtractContext'
buf	where to write bytes read
size	number of bytes desired

Returns: number of bytes copied to buf

Definition at line 1353 of file unzip.c.

References EXTRACTOR_ExtractContext::cls, and EXTRACTOR_ExtractContext::read.

Referenced by EXTRACTOR_common_unzip_open().

◆ ec_seek_file_func()

static long ec_seek_file_func	(	voidpf	opaque,
		uLong	offset,
		int	origin
	)

static

Callback to perform seek operation using LE API.

Parameters

opaque	the 'struct EXTRACTOR_ExtractContext'
offset	where to seek
origin	relative to where should we seek

Returns: EXTRACTOR_UNZIP_OK on success

Definition at line 1401 of file unzip.c.

References EXTRACTOR_ExtractContext::cls, EXTRACTOR_UNZIP_INTERNALERROR, EXTRACTOR_UNZIP_OK, and EXTRACTOR_ExtractContext::seek.

Referenced by EXTRACTOR_common_unzip_open().

◆ ec_tell_file_func()

static long ec_tell_file_func ( voidpf opaque )

static

Callback to obtain current offset in file using LE API.

Parameters

opaque the 'struct EXTRACTOR_ExtractContext'

Returns: current offset in file, -1 on error

Definition at line 1384 of file unzip.c.

References EXTRACTOR_ExtractContext::cls, and EXTRACTOR_ExtractContext::seek.

Referenced by EXTRACTOR_common_unzip_open().

◆ EXTRACTOR_common_unzip_close()

int EXTRACTOR_common_unzip_close ( struct EXTRACTOR_UnzipFile * file )

Close a ZipFile.

Parameters

file	zip file to close

Returns: EXTRACTOR_UNZIP_OK if there is no problem.

Definition at line 854 of file unzip.c.

References EXTRACTOR_common_unzip_close_current_file(), EXTRACTOR_UNZIP_OK, EXTRACTOR_UNZIP_PARAMERROR, NULL, and EXTRACTOR_UnzipFile::pfile_in_zip_read.

Referenced by EXTRACTOR_odf_extract_method(), and EXTRACTOR_zip_extract_method().

◆ EXTRACTOR_common_unzip_close_current_file()

int EXTRACTOR_common_unzip_close_current_file ( struct EXTRACTOR_UnzipFile * file )

Close the file in zip opened with EXTRACTOR_common_unzip_open_current_file().

Returns: EXTRACTOR_UNZIP_CRCERROR if all the file was read but the CRC is not good

Definition at line 823 of file unzip.c.

References FileInZipReadInfo::crc32, FileInZipReadInfo::crc32_wait, EXTRACTOR_UNZIP_CRCERROR, EXTRACTOR_UNZIP_OK, EXTRACTOR_UNZIP_PARAMERROR, NULL, EXTRACTOR_UnzipFile::pfile_in_zip_read, FileInZipReadInfo::read_buffer, FileInZipReadInfo::rest_read_uncompressed, FileInZipReadInfo::stream, and FileInZipReadInfo::stream_initialised.

Referenced by EXTRACTOR_common_unzip_close(), EXTRACTOR_common_unzip_open_current_file(), EXTRACTOR_odf_extract_method(), and libextractor_oo_getmimetype().

◆ EXTRACTOR_common_unzip_get_current_file_info()

int EXTRACTOR_common_unzip_get_current_file_info	(	struct EXTRACTOR_UnzipFile *	file,
		struct EXTRACTOR_UnzipFileInfo *	pfile_info,
		char *	szFileName,
		uLong	fileNameBufferSize,
		void *	extraField,
		uLong	extraFieldBufferSize,
		char *	szComment,
		uLong	commentBufferSize
	)

Write info about the ZipFile in the *pglobal_info structure. No preparation of the structure is needed.

Parameters

file	zipfile to manipulate
pfile_info	file information to initialize
szFileName	where to write the name of the current file
fileNameBufferSize	number of bytes available in szFileName
extraField	where to write extra data
extraFieldBufferSize	number of bytes available in extraField
szComment	where to write the comment on the current file
commentBufferSize	number of bytes available in szComment

Returns: EXTRACTOR_UNZIP_OK if there is no problem.

Definition at line 908 of file unzip.c.

References get_current_file_info(), and NULL.

Referenced by EXTRACTOR_common_unzip_go_find_local_file(), EXTRACTOR_odf_extract_method(), EXTRACTOR_zip_extract_method(), and libextractor_oo_getmimetype().

◆ EXTRACTOR_common_unzip_get_global_comment()

int EXTRACTOR_common_unzip_get_global_comment	(	struct EXTRACTOR_UnzipFile *	file,
		char *	comment,
		size_t	comment_len
	)

Obtain the global comment from a ZIP file.

Parameters

file	unzip file to inspect
comment	where to copy the comment
comment_len	maximum number of bytes available in comment

Returns: EXTRACTOR_UNZIP_OK on success

Definition at line 874 of file unzip.c.

References EXTRACTOR_UNZIP_ERRNO, EXTRACTOR_UNZIP_OK, EXTRACTOR_UNZIP_PARAMERROR, EXTRACTOR_UnzipFile::gi, NULL, GlobalInfo::offset_comment, GlobalInfo::size_comment, EXTRACTOR_UnzipFile::z_filefunc, ZREAD, and ZSEEK.

Referenced by EXTRACTOR_zip_extract_method().

◆ EXTRACTOR_common_unzip_go_find_local_file()

int EXTRACTOR_common_unzip_go_find_local_file	(	struct EXTRACTOR_UnzipFile *	file,
		const char *	szFileName,
		int	iCaseSensitivity
	)

Try locate the file szFileName in the zipfile.

Parameters

file	zipfile to manipulate
szFileName	name to find
iCaseSensitivity,use	1 for case sensitivity (like strcmp); 2 for no case sensitivity (like strcmpi or strcasecmp); or 0 for default of your operating system (like 1 on Unix, 2 on Windows)

Returns: EXTRACTOR_UNZIP_OK if the file is found. It becomes the current file. EXTRACTOR_UNZIP_END_OF_LIST_OF_FILE if the file is not found

Definition at line 969 of file unzip.c.

References EXTRACTOR_UnzipFile::cur_file_info, EXTRACTOR_UnzipFile::cur_file_info_internal, EXTRACTOR_UnzipFile::current_file_ok, EXTRACTOR_common_unzip_get_current_file_info(), EXTRACTOR_common_unzip_go_to_first_file(), EXTRACTOR_common_unzip_go_to_next_file(), EXTRACTOR_common_unzip_string_file_name_compare(), EXTRACTOR_UNZIP_END_OF_LIST_OF_FILE, EXTRACTOR_UNZIP_OK, EXTRACTOR_UNZIP_PARAMERROR, NULL, EXTRACTOR_UnzipFile::num_file, EXTRACTOR_UnzipFile::pos_in_central_dir, and UNZ_MAXFILENAMEINZIP.

Referenced by EXTRACTOR_odf_extract_method(), EXTRACTOR_zip_extract_method(), and libextractor_oo_getmimetype().

◆ EXTRACTOR_common_unzip_go_to_first_file()

int EXTRACTOR_common_unzip_go_to_first_file ( struct EXTRACTOR_UnzipFile * file )

Set the current file of the zipfile to the first file.

Parameters

file	zipfile to manipulate

Returns: UNZ_OK if there is no problem

Definition at line 707 of file unzip.c.

References EXTRACTOR_UnzipFile::cur_file_info, EXTRACTOR_UnzipFile::cur_file_info_internal, EXTRACTOR_UnzipFile::current_file_ok, EXTRACTOR_UNZIP_OK, EXTRACTOR_UNZIP_PARAMERROR, get_current_file_info(), NULL, EXTRACTOR_UnzipFile::num_file, EXTRACTOR_UnzipFile::offset_central_dir, and EXTRACTOR_UnzipFile::pos_in_central_dir.

Referenced by EXTRACTOR_common_unzip_go_find_local_file(), EXTRACTOR_zip_extract_method(), and unzip_open_using_ffd().

◆ EXTRACTOR_common_unzip_go_to_next_file()

int EXTRACTOR_common_unzip_go_to_next_file ( struct EXTRACTOR_UnzipFile * file )

Set the current file of the zipfile to the next file.

Parameters

file	zipfile to manipulate

Returns: EXTRACTOR_UNZIP_OK if there is no problem, EXTRACTOR_UNZIP_END_OF_LIST_OF_FILE if the actual file was the latest.

Definition at line 933 of file unzip.c.

Referenced by EXTRACTOR_common_unzip_go_find_local_file(), and EXTRACTOR_zip_extract_method().

◆ EXTRACTOR_common_unzip_open()

struct EXTRACTOR_UnzipFile * EXTRACTOR_common_unzip_open ( struct EXTRACTOR_ExtractContext * ec )

Open a zip file for processing using the data access functions from the extract context.

Parameters

ec	extract context to use

Returns: handle to zip data, NULL on error

Definition at line 1421 of file unzip.c.

References ec_read_file_func(), ec_seek_file_func(), ec_tell_file_func(), FileFuncDefs::opaque, unzip_open_using_ffd(), FileFuncDefs::zread_file, FileFuncDefs::zseek_file, and FileFuncDefs::ztell_file.

Referenced by EXTRACTOR_odf_extract_method(), and EXTRACTOR_zip_extract_method().

◆ EXTRACTOR_common_unzip_open_current_file()

int EXTRACTOR_common_unzip_open_current_file ( struct EXTRACTOR_UnzipFile * file )

Open for reading data the current file in the zipfile.

Parameters

file	zipfile to manipulate

Returns: EXTRACTOR_UNZIP_OK on success

Definition at line 1259 of file unzip.c.

References FileInZipReadInfo::byte_before_the_zipfile, EXTRACTOR_UnzipFile::byte_before_the_zipfile, EXTRACTOR_UnzipFileInfo::compressed_size, FileInZipReadInfo::compression_method, EXTRACTOR_UnzipFileInfo::compression_method, EXTRACTOR_UnzipFileInfo::crc, FileInZipReadInfo::crc32, FileInZipReadInfo::crc32_wait, EXTRACTOR_UnzipFile::cur_file_info, EXTRACTOR_UnzipFile::cur_file_info_internal, EXTRACTOR_UnzipFile::current_file_ok, EXTRACTOR_common_unzip_close_current_file(), EXTRACTOR_UNZIP_BADZIPFILE, EXTRACTOR_UNZIP_INTERNALERROR, EXTRACTOR_UNZIP_OK, EXTRACTOR_UNZIP_PARAMERROR, NULL, UnzipFileInfoInternal::offset_curfile, FileInZipReadInfo::offset_local_extrafield, parse_current_file_coherency_header(), EXTRACTOR_UnzipFile::pfile_in_zip_read, FileInZipReadInfo::pos_in_zipfile, FileInZipReadInfo::pos_local_extrafield, FileInZipReadInfo::read_buffer, FileInZipReadInfo::rest_read_compressed, FileInZipReadInfo::rest_read_uncompressed, FileInZipReadInfo::size_local_extrafield, SIZEZIPLOCALHEADER, FileInZipReadInfo::stream, FileInZipReadInfo::stream_initialised, EXTRACTOR_UnzipFileInfo::uncompressed_size, UNZ_BUFSIZE, FileInZipReadInfo::z_filefunc, and EXTRACTOR_UnzipFile::z_filefunc.

Referenced by EXTRACTOR_odf_extract_method(), and libextractor_oo_getmimetype().

◆ EXTRACTOR_common_unzip_read_current_file()

ssize_t EXTRACTOR_common_unzip_read_current_file	(	struct EXTRACTOR_UnzipFile *	file,
		void *	buf,
		size_t	len
	)

Read bytes from the current file (must have been opened).

Parameters

buf	contain buffer where data must be copied
len	the size of buf.

Returns: the number of byte copied if some bytes are copied 0 if the end of file was reached <0 with error code if there is an error (EXTRACTOR_UNZIP_ERRNO for IO error, or zLib error for uncompress error)

Definition at line 1038 of file unzip.c.

Referenced by EXTRACTOR_odf_extract_method(), and libextractor_oo_getmimetype().

◆ EXTRACTOR_common_unzip_string_file_name_compare()

static int EXTRACTOR_common_unzip_string_file_name_compare	(	const char *	fileName1,
		const char *	fileName2,
		int	iCaseSensitivity
	)

static

Compare two filenames (fileName1, fileName2).

Parameters

filename1	name of first file
filename2	name of second file
iCaseSensitivity,use	1 for case sensitivity (like strcmp); 2 for no case sensitivity (like strcmpi or strcasecmp); or 0 for default of your operating system (like 1 on Unix, 2 on Windows)

Returns: 0 if names are equal

Definition at line 441 of file unzip.c.

References CASESENSITIVITYDEFAULTVALUE.

Referenced by EXTRACTOR_common_unzip_go_find_local_file().

◆ get_current_file_info()

static int get_current_file_info	(	struct EXTRACTOR_UnzipFile *	file,
		struct EXTRACTOR_UnzipFileInfo *	pfile_info,
		struct UnzipFileInfoInternal *	pfile_info_internal,
		char *	szFileName,
		uLong	fileNameBufferSize,
		void *	extraField,
		uLong	extraFieldBufferSize,
		char *	szComment,
		uLong	commentBufferSize
	)

static

Write info about the ZipFile in the *pglobal_info structure. No preparation of the structure is needed.

Parameters

file	zipfile to manipulate
pfile_info	file information to initialize
pfile_info_internal	internal file information to initialize
szFileName	where to write the name of the current file
fileNameBufferSize	number of bytes available in szFileName
extraField	where to write extra data
extraFieldBufferSize	number of bytes available in extraField
szComment	where to write the comment on the current file
commentBufferSize	number of bytes available in szComment

Returns: EXTRACTOR_UNZIP_OK if there is no problem.

Definition at line 547 of file unzip.c.

Referenced by EXTRACTOR_common_unzip_get_current_file_info(), EXTRACTOR_common_unzip_go_to_first_file(), and EXTRACTOR_common_unzip_go_to_next_file().

◆ locate_central_directory()

static uLong locate_central_directory ( const struct FileFuncDefs * ffd )

static

Locate the central directory in the ZIP file.

Parameters

ffd	IO functions

Returns: offset of central directory, 0 on error

Definition at line 465 of file unzip.c.

References BUFREADCOMMENT, ZREAD, ZSEEK, and ZTELL.

Referenced by unzip_open_using_ffd().

◆ parse_current_file_coherency_header()

static int parse_current_file_coherency_header	(	struct EXTRACTOR_UnzipFile *	file,
		uInt *	piSizeVar,
		uLong *	poffset_local_extrafield,
		uInt *	psize_local_extrafield
	)

static

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)

Parameters

file	zipfile to process
piSizeVar	where to store the size of the extra info
poffset_local_extrafield	where to store the offset of the local extrafield
psoze_local_extrafield	where to store the size of the local extrafield

Returns: EXTRACTOR_UNZIP_OK on success

Definition at line 1173 of file unzip.c.

References EXTRACTOR_UnzipFile::byte_before_the_zipfile, EXTRACTOR_UnzipFileInfo::compressed_size, EXTRACTOR_UnzipFileInfo::compression_method, EXTRACTOR_UnzipFileInfo::crc, EXTRACTOR_UnzipFile::cur_file_info, EXTRACTOR_UnzipFile::cur_file_info_internal, EXTRACTOR_UNZIP_BADZIPFILE, EXTRACTOR_UNZIP_ERRNO, EXTRACTOR_UNZIP_OK, UnzipFileInfoInternal::offset_curfile, read_long_from_ffd(), read_short_from_ffd(), EXTRACTOR_UnzipFileInfo::size_filename, SIZEZIPLOCALHEADER, EXTRACTOR_UnzipFileInfo::uncompressed_size, EXTRACTOR_UnzipFile::z_filefunc, and ZSEEK.

Referenced by EXTRACTOR_common_unzip_open_current_file().

◆ read_byte_from_ffd()

static int read_byte_from_ffd	(	const struct FileFuncDefs *	ffd,
		int *	pi
	)

static

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 successfully opened for reading.

Parameters

ffd	functions for performing IO operations
pi	where to store the byte that was read

Returns: EXTRACTOR_UNZIP_OK on success, or EXTRACTOR_UNZIP_EOF

Definition at line 341 of file unzip.c.

References EXTRACTOR_UNZIP_EOF, EXTRACTOR_UNZIP_OK, and ZREAD.

Referenced by read_long_from_ffd(), and read_short_from_ffd().

◆ read_long_from_ffd()

static int read_long_from_ffd	(	const struct FileFuncDefs *	ffd,
		uLong *	pX
	)

static

Read a 'long' (4 bytes) from a gz_stream; update next_in and avail_in. Return EOF for end of file. IN assertion: the stream s has been successfully opened for reading.

Parameters

ffd	functions for performing IO operations
pi	where to store the long that was read

Returns: EXTRACTOR_UNZIP_OK on success, or EXTRACTOR_UNZIP_EOF

Definition at line 392 of file unzip.c.

References EXTRACTOR_UNZIP_OK, and read_byte_from_ffd().

Referenced by get_current_file_info(), parse_current_file_coherency_header(), and unzip_open_using_ffd().

◆ read_short_from_ffd()

static int read_short_from_ffd	(	const struct FileFuncDefs *	ffd,
		uLong *	pX
	)

static

Read a short (2 bytes) from a gz_stream; update next_in and avail_in. Return EOF for end of file. IN assertion: the stream s has been successfully opened for reading.

Parameters

ffd	functions for performing IO operations
pi	where to store the short that was read

Returns: EXTRACTOR_UNZIP_OK on success, or EXTRACTOR_UNZIP_EOF

Definition at line 363 of file unzip.c.

References EXTRACTOR_UNZIP_OK, and read_byte_from_ffd().

Referenced by get_current_file_info(), parse_current_file_coherency_header(), and unzip_open_using_ffd().

◆ unzip_open_using_ffd()

static struct EXTRACTOR_UnzipFile * unzip_open_using_ffd ( struct FileFuncDefs * ffd )

static

Open a Zip file.

Parameters

ffd	IO functions

Returns: NULL on error

Definition at line 731 of file unzip.c.

Referenced by EXTRACTOR_common_unzip_open().

Data Structures

Macros

Functions

Detailed Description

Macro Definition Documentation

◆ BUFREADCOMMENT

◆ CASESENSITIVITY

◆ CASESENSITIVITYDEFAULT_NO

◆ CASESENSITIVITYDEFAULTVALUE

◆ MAXFILENAME

◆ SIZECENTRALDIRITEM

◆ SIZEZIPLOCALHEADER

◆ UNZ_BUFSIZE

◆ UNZ_MAXFILENAMEINZIP

◆ ZREAD

◆ ZSEEK

◆ ZTELL

Function Documentation

◆ dos_date_to_tmu_date()

◆ ec_read_file_func()

◆ ec_seek_file_func()

◆ ec_tell_file_func()

◆ EXTRACTOR_common_unzip_close()

◆ EXTRACTOR_common_unzip_close_current_file()

◆ EXTRACTOR_common_unzip_get_current_file_info()

◆ EXTRACTOR_common_unzip_get_global_comment()

◆ EXTRACTOR_common_unzip_go_find_local_file()

◆ EXTRACTOR_common_unzip_go_to_first_file()

◆ EXTRACTOR_common_unzip_go_to_next_file()

◆ EXTRACTOR_common_unzip_open()

◆ EXTRACTOR_common_unzip_open_current_file()

◆ EXTRACTOR_common_unzip_read_current_file()

◆ EXTRACTOR_common_unzip_string_file_name_compare()

◆ get_current_file_info()

◆ locate_central_directory()

◆ parse_current_file_coherency_header()

◆ read_byte_from_ffd()

◆ read_long_from_ffd()

◆ read_short_from_ffd()

◆ unzip_open_using_ffd()