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v/thirdparty/zip/zip.h

469 lines
14 KiB
C

/*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#pragma once
#ifndef ZIP_H
#define ZIP_H
#include <stdint.h>
#include <string.h>
#include <sys/types.h>
#ifndef ZIP_SHARED
#define ZIP_EXPORT
#else
#ifdef _WIN32
#ifdef ZIP_BUILD_SHARED
#define ZIP_EXPORT __declspec(dllexport)
#else
#define ZIP_EXPORT __declspec(dllimport)
#endif
#else
#define ZIP_EXPORT __attribute__((visibility("default")))
#endif
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if !defined(_POSIX_C_SOURCE) && defined(_MSC_VER)
// 64-bit Windows is the only mainstream platform
// where sizeof(long) != sizeof(void*)
#ifdef _WIN64
typedef long long ssize_t; /* byte count or error */
#else
typedef long ssize_t; /* byte count or error */
#endif
#endif
#ifndef MAX_PATH
#define MAX_PATH 1024 /* # chars in a path name including NULL */
#endif
/**
* @mainpage
*
* Documenation for @ref zip.
*/
/**
* @addtogroup zip
* @{
*/
/**
* Default zip compression level.
*/
#define ZIP_DEFAULT_COMPRESSION_LEVEL 6
/**
* Error codes
*/
#define ZIP_ENOINIT -1 // not initialized
#define ZIP_EINVENTNAME -2 // invalid entry name
#define ZIP_ENOENT -3 // entry not found
#define ZIP_EINVMODE -4 // invalid zip mode
#define ZIP_EINVLVL -5 // invalid compression level
#define ZIP_ENOSUP64 -6 // no zip 64 support
#define ZIP_EMEMSET -7 // memset error
#define ZIP_EWRTENT -8 // cannot write data to entry
#define ZIP_ETDEFLINIT -9 // cannot initialize tdefl compressor
#define ZIP_EINVIDX -10 // invalid index
#define ZIP_ENOHDR -11 // header not found
#define ZIP_ETDEFLBUF -12 // cannot flush tdefl buffer
#define ZIP_ECRTHDR -13 // cannot create entry header
#define ZIP_EWRTHDR -14 // cannot write entry header
#define ZIP_EWRTDIR -15 // cannot write to central dir
#define ZIP_EOPNFILE -16 // cannot open file
#define ZIP_EINVENTTYPE -17 // invalid entry type
#define ZIP_EMEMNOALLOC -18 // extracting data using no memory allocation
#define ZIP_ENOFILE -19 // file not found
#define ZIP_ENOPERM -20 // no permission
#define ZIP_EOOMEM -21 // out of memory
#define ZIP_EINVZIPNAME -22 // invalid zip archive name
#define ZIP_EMKDIR -23 // make dir error
#define ZIP_ESYMLINK -24 // symlink error
#define ZIP_ECLSZIP -25 // close archive error
#define ZIP_ECAPSIZE -26 // capacity size too small
#define ZIP_EFSEEK -27 // fseek error
#define ZIP_EFREAD -28 // fread error
#define ZIP_EFWRITE -29 // fwrite error
/**
* Looks up the error message string coresponding to an error number.
* @param errnum error number
* @return error message string coresponding to errnum or NULL if error is not
* found.
*/
extern ZIP_EXPORT const char *zip_strerror(int errnum);
/**
* @struct zip_t
*
* This data structure is used throughout the library to represent zip archive -
* forward declaration.
*/
struct zip_t;
/**
* Opens zip archive with compression level using the given mode.
*
* @param zipname zip archive file name.
* @param level compression level (0-9 are the standard zlib-style levels).
* @param mode file access mode.
* - 'r': opens a file for reading/extracting (the file must exists).
* - 'w': creates an empty file for writing.
* - 'a': appends to an existing archive.
*
* @return the zip archive handler or NULL on error
*/
extern ZIP_EXPORT struct zip_t *zip_open(const char *zipname, int level,
char mode);
/**
* Closes the zip archive, releases resources - always finalize.
*
* @param zip zip archive handler.
*/
extern ZIP_EXPORT void zip_close(struct zip_t *zip);
/**
* Determines if the archive has a zip64 end of central directory headers.
*
* @param zip zip archive handler.
*
* @return the return code - 1 (true), 0 (false), negative number (< 0) on
* error.
*/
extern ZIP_EXPORT int zip_is64(struct zip_t *zip);
/**
* Opens an entry by name in the zip archive.
*
* For zip archive opened in 'w' or 'a' mode the function will append
* a new entry. In readonly mode the function tries to locate the entry
* in global dictionary.
*
* @param zip zip archive handler.
* @param entryname an entry name in local dictionary.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_open(struct zip_t *zip, const char *entryname);
/**
* Opens an entry by name in the zip archive.
*
* For zip archive opened in 'w' or 'a' mode the function will append
* a new entry. In readonly mode the function tries to locate the entry
* in global dictionary (case sensitive).
*
* @param zip zip archive handler.
* @param entryname an entry name in local dictionary (case sensitive).
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_opencasesensitive(struct zip_t *zip,
const char *entryname);
/**
* Opens a new entry by index in the zip archive.
*
* This function is only valid if zip archive was opened in 'r' (readonly) mode.
*
* @param zip zip archive handler.
* @param index index in local dictionary.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_openbyindex(struct zip_t *zip, size_t index);
/**
* Closes a zip entry, flushes buffer and releases resources.
*
* @param zip zip archive handler.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_close(struct zip_t *zip);
/**
* Returns a local name of the current zip entry.
*
* The main difference between user's entry name and local entry name
* is optional relative path.
* Following .ZIP File Format Specification - the path stored MUST not contain
* a drive or device letter, or a leading slash.
* All slashes MUST be forward slashes '/' as opposed to backwards slashes '\'
* for compatibility with Amiga and UNIX file systems etc.
*
* @param zip: zip archive handler.
*
* @return the pointer to the current zip entry name, or NULL on error.
*/
extern ZIP_EXPORT const char *zip_entry_name(struct zip_t *zip);
/**
* Returns an index of the current zip entry.
*
* @param zip zip archive handler.
*
* @return the index on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT ssize_t zip_entry_index(struct zip_t *zip);
/**
* Determines if the current zip entry is a directory entry.
*
* @param zip zip archive handler.
*
* @return the return code - 1 (true), 0 (false), negative number (< 0) on
* error.
*/
extern ZIP_EXPORT int zip_entry_isdir(struct zip_t *zip);
/**
* Returns the uncompressed size of the current zip entry.
* Alias for zip_entry_uncomp_size (for backward compatibility).
*
* @param zip zip archive handler.
*
* @return the uncompressed size in bytes.
*/
extern ZIP_EXPORT unsigned long long zip_entry_size(struct zip_t *zip);
/**
* Returns the uncompressed size of the current zip entry.
*
* @param zip zip archive handler.
*
* @return the uncompressed size in bytes.
*/
extern ZIP_EXPORT unsigned long long zip_entry_uncomp_size(struct zip_t *zip);
/**
* Returns the compressed size of the current zip entry.
*
* @param zip zip archive handler.
*
* @return the compressed size in bytes.
*/
extern ZIP_EXPORT unsigned long long zip_entry_comp_size(struct zip_t *zip);
/**
* Returns CRC-32 checksum of the current zip entry.
*
* @param zip zip archive handler.
*
* @return the CRC-32 checksum.
*/
extern ZIP_EXPORT unsigned int zip_entry_crc32(struct zip_t *zip);
/**
* Compresses an input buffer for the current zip entry.
*
* @param zip zip archive handler.
* @param buf input buffer.
* @param bufsize input buffer size (in bytes).
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_write(struct zip_t *zip, const void *buf,
size_t bufsize);
/**
* Compresses a file for the current zip entry.
*
* @param zip zip archive handler.
* @param filename input file.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_fwrite(struct zip_t *zip, const char *filename);
/**
* Extracts the current zip entry into output buffer.
*
* The function allocates sufficient memory for a output buffer.
*
* @param zip zip archive handler.
* @param buf output buffer.
* @param bufsize output buffer size (in bytes).
*
* @note remember to release memory allocated for a output buffer.
* for large entries, please take a look at zip_entry_extract function.
*
* @return the return code - the number of bytes actually read on success.
* Otherwise a negative number (< 0) on error.
*/
extern ZIP_EXPORT ssize_t zip_entry_read(struct zip_t *zip, void **buf,
size_t *bufsize);
/**
* Extracts the current zip entry into a memory buffer using no memory
* allocation.
*
* @param zip zip archive handler.
* @param buf preallocated output buffer.
* @param bufsize output buffer size (in bytes).
*
* @note ensure supplied output buffer is large enough.
* zip_entry_size function (returns uncompressed size for the current
* entry) can be handy to estimate how big buffer is needed.
* For large entries, please take a look at zip_entry_extract function.
*
* @return the return code - the number of bytes actually read on success.
* Otherwise a negative number (< 0) on error (e.g. bufsize is not large
* enough).
*/
extern ZIP_EXPORT ssize_t zip_entry_noallocread(struct zip_t *zip, void *buf,
size_t bufsize);
/**
* Extracts the current zip entry into output file.
*
* @param zip zip archive handler.
* @param filename output file.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_entry_fread(struct zip_t *zip, const char *filename);
/**
* Extracts the current zip entry using a callback function (on_extract).
*
* @param zip zip archive handler.
* @param on_extract callback function.
* @param arg opaque pointer (optional argument, which you can pass to the
* on_extract callback)
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int
zip_entry_extract(struct zip_t *zip,
size_t (*on_extract)(void *arg, uint64_t offset,
const void *data, size_t size),
void *arg);
/**
* Returns the number of all entries (files and directories) in the zip archive.
*
* @param zip zip archive handler.
*
* @return the return code - the number of entries on success, negative number
* (< 0) on error.
*/
extern ZIP_EXPORT ssize_t zip_entries_total(struct zip_t *zip);
/**
* Deletes zip archive entries.
*
* @param zip zip archive handler.
* @param entries array of zip archive entries to be deleted.
* @param len the number of entries to be deleted.
* @return the number of deleted entries, or negative number (< 0) on error.
*/
extern ZIP_EXPORT ssize_t zip_entries_delete(struct zip_t *zip,
char *const entries[], size_t len);
/**
* Extracts a zip archive stream into directory.
*
* If on_extract is not NULL, the callback will be called after
* successfully extracted each zip entry.
* Returning a negative value from the callback will cause abort and return an
* error. The last argument (void *arg) is optional, which you can use to pass
* data to the on_extract callback.
*
* @param stream zip archive stream.
* @param size stream size.
* @param dir output directory.
* @param on_extract on extract callback.
* @param arg opaque pointer.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int
zip_stream_extract(const char *stream, size_t size, const char *dir,
int (*on_extract)(const char *filename, void *arg),
void *arg);
/**
* Opens zip archive stream into memory.
*
* @param stream zip archive stream.
* @param size stream size.
*
* @return the zip archive handler or NULL on error
*/
extern ZIP_EXPORT struct zip_t *zip_stream_open(const char *stream, size_t size,
int level, char mode);
/**
* Copy zip archive stream output buffer.
*
* @param zip zip archive handler.
* @param buf output buffer. User should free buf.
* @param bufsize output buffer size (in bytes).
*
* @return copy size
*/
extern ZIP_EXPORT ssize_t zip_stream_copy(struct zip_t *zip, void **buf,
size_t *bufsize);
/**
* Close zip archive releases resources.
*
* @param zip zip archive handler.
*
* @return
*/
extern ZIP_EXPORT void zip_stream_close(struct zip_t *zip);
/**
* Creates a new archive and puts files into a single zip archive.
*
* @param zipname zip archive file.
* @param filenames input files.
* @param len: number of input files.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_create(const char *zipname, const char *filenames[],
size_t len);
/**
* Extracts a zip archive file into directory.
*
* If on_extract_entry is not NULL, the callback will be called after
* successfully extracted each zip entry.
* Returning a negative value from the callback will cause abort and return an
* error. The last argument (void *arg) is optional, which you can use to pass
* data to the on_extract_entry callback.
*
* @param zipname zip archive file.
* @param dir output directory.
* @param on_extract_entry on extract callback.
* @param arg opaque pointer.
*
* @return the return code - 0 on success, negative number (< 0) on error.
*/
extern ZIP_EXPORT int zip_extract(const char *zipname, const char *dir,
int (*on_extract_entry)(const char *filename,
void *arg),
void *arg);
/** @} */
#ifdef __cplusplus
}
#endif
#endif