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4680 lines
211 KiB
C
4680 lines
211 KiB
C
/* miniz.c v1.11 - public domain deflate/inflate, zlib-subset, ZIP reading/writing/appending, PNG writing
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See "unlicense" statement at the end of this file.
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Rich Geldreich <richgel99@gmail.com>, last updated May 27, 2011
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Implements RFC 1950: http://www.ietf.org/rfc/rfc1950.txt and RFC 1951: http://www.ietf.org/rfc/rfc1951.txt
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Most API's defined in miniz.c are optional. For example, to disable the archive related functions just define
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MINIZ_NO_ARCHIVE_APIS, or to get rid of all stdio usage define MINIZ_NO_STDIO (see the list below for more macros).
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* Change History
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May 15, v1.09 - Initial stable release.
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May 27, v1.10 - Substantial compressor optimizations:
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Level 1 is now ~4x faster than before. The L1 compressor's throughput now varies between 70-110MB/sec. on a
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Core i7 (actual throughput varies depending on the type of data, and x64 vs. x86).
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Improved baseline L2-L9 compression perf. Also, greatly improved compression perf. issues on some file types.
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Refactored the compression code for better readability and maintainability.
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Added level 10 compression level (L10 has slightly better ratio than level 9, but could have a potentially large
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drop in throughput on some files).
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May 28, v1.11 - Added statement from unlicense.org
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* Deflate/Inflate implementation notes:
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Compression: Use the "tdefl" API's. The compressor supports raw, static, and dynamic blocks, lazy or
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greedy parsing, match length filtering, RLE-only, and Huffman-only streams. It performs and compresses
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approximately as well as zlib.
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Decompression: Use the "tinfl" API's. The entire decompressor is implemented as a single function
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coroutine: see tinfl_decompress(). It supports decompression into a 32KB wrapping buffer or into a memory
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block large enough to hold the entire file.
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The low-level tdefl/tinfl API's do not make any use of dynamic memory allocation.
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* zlib-style API notes:
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miniz.c implements a fairly large subset of zlib. There's enough functionality present for it to be a drop-in
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zlib replacement in many apps:
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The z_stream struct, optional memory allocation callbacks
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deflateInit/deflateInit2/deflate/deflateReset/deflateEnd/deflateBound
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inflateInit/inflateInit2/inflate/inflateEnd
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compress, compress2, compressBound, uncompress
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CRC-32, Adler-32
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Supports raw deflate streams or standard zlib streams with adler-32 checking.
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Limitations:
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The callback API's are not implemented yet. No support for gzip headers or zlib static dictionaries.
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I've tried to closely emulate zlib's various flavors of stream flushing and return status codes, but
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there are no guarantees that miniz.c pulls this off perfectly.
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* PNG writing: See the tdefl_write_image_to_png_file_in_memory() function, originally written by
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Alex Evans. Supports 1-4 bytes/pixel images.
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* ZIP archive API notes:
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The ZIP archive API's where designed with simplicity and efficiency in mind, with just enough abstraction to
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get the job done with minimal fuss. There are simple API's to retrieve file information, read files from
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existing archives, create new archives, append new files to existing archives, or clone archive data from
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one archive to another. It supports archives located in memory or the heap, on disk (using stdio.h),
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or you can specify custom file read/write callbacks.
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- Archive reading: Just call this function to read a single file from a disk archive:
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void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name,
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size_t *pSize, mz_uint zip_flags);
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For more complex cases, use the "mz_zip_reader" functions. Upon opening an archive, the entire central
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directory is located and read as-is into memory, and subsequent file access only occurs when reading individual files.
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- Archives file scanning: The simple way is to use this function to scan a loaded archive for a specific file:
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int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags);
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The locate operation can optionally check file comments too, which (as one example) can be used to identify
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multiple versions of the same file in an archive. This function uses a simple linear search through the central
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directory, so it's not very fast.
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Alternately, you can iterate through all the files in an archive (using mz_zip_reader_get_num_files()) and
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retrieve detailed info on each file by calling mz_zip_reader_file_stat().
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- Archive creation: Use the "mz_zip_writer" functions. The ZIP writer immediately writes compressed file data
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to disk and builds an exact image of the central directory in memory. The central directory image is written
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all at once at the end of the archive file when the archive is finalized.
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The archive writer can optionally align each file's local header and file data to any power of 2 alignment,
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which can be useful when the archive will be read from optical media. Also, the writer supports placing
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arbitrary data blobs at the very beginning of ZIP archives. Archives written using either feature are still
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readable by any ZIP tool.
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- Archive appending: The simple way to add a single file to an archive is to call this function:
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mz_bool mz_zip_add_mem_to_archive_file_in_place(const char *pZip_filename, const char *pArchive_name,
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const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags);
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The archive will be created if it doesn't already exist, otherwise it'll be appended to.
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Note the appending is done in-place and is not an atomic operation, so if something goes wrong
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during the operation it's possible the archive could be left without a central directory (although the local
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file headers and file data will be fine, so the archive will be recoverable).
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For more complex archive modification scenarios:
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1. The safest way is to use a mz_zip_reader to read the existing archive, cloning only those bits you want to
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preserve into a new archive using using the mz_zip_writer_add_from_zip_reader() function (which compiles the
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compressed file data as-is). When you're done, delete the old archive and rename the newly written archive, and
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you're done. This is safe but requires a bunch of temporary disk space or heap memory.
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2. Or, you can convert an mz_zip_reader in-place to an mz_zip_writer using mz_zip_writer_init_from_reader(),
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append new files as needed, then finalize the archive which will write an updated central directory to the
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original archive. (This is basically what mz_zip_add_mem_to_archive_file_in_place() does.) There's a
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possibility that the archive's central directory could be lost with this method if anything goes wrong, though.
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- ZIP archive support limitations:
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No zip64 or spanning support. Extraction functions can only handle unencrypted, stored or deflated files.
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Requires streams capable of seeking.
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* This is a header file library, like stb_image.c. To get only a header file, either cut and paste the
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below header, or create miniz.h, #define MINIZ_HEADER_FILE_ONLY, and then include miniz.c from it.
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* Important: For best perf. be sure to customize the below macros for your target platform:
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#define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1
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#define MINIZ_LITTLE_ENDIAN 1
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#define MINIZ_HAS_64BIT_REGISTERS 1
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*/
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#ifndef MINIZ_HEADER_INCLUDED
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#define MINIZ_HEADER_INCLUDED
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#include <stdlib.h>
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// Defines to completely disable specific portions of miniz.c:
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// If all macros here are defined the only functionality remaining will be CRC-32, adler-32, tinfl, and tdefl.
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// Define MINIZ_NO_STDIO to disable all usage and any functions which rely on stdio for file I/O.
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//#define MINIZ_NO_STDIO
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// If MINIZ_NO_TIME is specified then the ZIP archive functions will not be able to get the current time, or
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// get/set file times.
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#define MINIZ_NO_TIME
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// Define MINIZ_NO_ARCHIVE_APIS to disable all ZIP archive API's.
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//#define MINIZ_NO_ARCHIVE_APIS
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// Define MINIZ_NO_ARCHIVE_APIS to disable all writing related ZIP archive API's.
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#define MINIZ_NO_ARCHIVE_WRITING_APIS
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// Define MINIZ_NO_ZLIB_APIS to remove all ZLIB-style compression/decompression API's.
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//#define MINIZ_NO_ZLIB_APIS
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// Define MINIZ_NO_ZLIB_COMPATIBLE_NAME to disable zlib names, to prevent conflicts against stock zlib.
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//#define MINIZ_NO_ZLIB_COMPATIBLE_NAMES
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// Define MINIZ_NO_MALLOC to disable all calls to malloc, free, and realloc.
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// Note if MINIZ_NO_MALLOC is defined then the user must always provide custom user alloc/free/realloc
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// callbacks to the zlib and archive API's, and a few stand-alone helper API's which don't provide custom user
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// functions (such as tdefl_compress_mem_to_heap() and tinfl_decompress_mem_to_heap()) won't work.
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//#define MINIZ_NO_MALLOC
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#if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__i386) || defined(__i486__) || defined(__i486) || defined(i386) || defined(__ia64__) || defined(__x86_64__)
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// MINIZ_X86_OR_X64_CPU is only used to help set the below macros.
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#define MINIZ_X86_OR_X64_CPU 1
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#endif
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#if (__BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__) || MINIZ_X86_OR_X64_CPU
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// Set MINIZ_LITTLE_ENDIAN to 1 if the processor is little endian.
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#define MINIZ_LITTLE_ENDIAN 1
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#endif
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#if MINIZ_X86_OR_X64_CPU
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// Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 on CPU's that permit efficient integer loads and stores from unaligned addresses.
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#define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1
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#endif
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#if defined(_M_X64) || defined(_WIN64) || defined(__MINGW64__) || defined(_LP64) || defined(__LP64__) || defined(__ia64__) || defined(__x86_64__)
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// Set MINIZ_HAS_64BIT_REGISTERS to 1 if operations on 64-bit integers are reasonably fast (and don't involve compiler generated calls to helper functions).
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#define MINIZ_HAS_64BIT_REGISTERS 1
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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// ------------------- zlib-style API Definitions.
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// For more compatibility with zlib, miniz.c uses unsigned long for some parameters/struct members.
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typedef unsigned long mz_ulong;
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// Heap allocation callbacks.
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// Note that mz_alloc_func parameter types purpsosely differ from zlib's: items/size is size_t, not unsigned long.
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typedef void *(*mz_alloc_func)(void *opaque, size_t items, size_t size);
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typedef void (*mz_free_func)(void *opaque, void *address);
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typedef void *(*mz_realloc_func)(void *opaque, void *address, size_t items, size_t size);
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#define MZ_ADLER32_INIT (1)
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// mz_adler32() returns the initial adler-32 value to use when called with ptr==NULL.
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mz_ulong mz_adler32(mz_ulong adler, const unsigned char *ptr, size_t buf_len);
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#define MZ_CRC32_INIT (0)
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// mz_crc32() returns the initial CRC-32 value to use when called with ptr==NULL.
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mz_ulong mz_crc32(mz_ulong crc, const unsigned char *ptr, size_t buf_len);
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// Compression strategies.
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enum { MZ_DEFAULT_STRATEGY = 0, MZ_FILTERED = 1, MZ_HUFFMAN_ONLY = 2, MZ_RLE = 3, MZ_FIXED = 4 };
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// Method
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#define MZ_DEFLATED 8
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#ifndef MINIZ_NO_ZLIB_APIS
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#define MZ_VERSION "9.1.11"
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#define MZ_VERNUM 0x91B0
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#define MZ_VER_MAJOR 9
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#define MZ_VER_MINOR 1
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#define MZ_VER_REVISION 11
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#define MZ_VER_SUBREVISION 0
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// Flush values. For typical usage you only need MZ_NO_FLUSH and MZ_FINISH. The other stuff is for advanced use.
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enum { MZ_NO_FLUSH = 0, MZ_PARTIAL_FLUSH = 1, MZ_SYNC_FLUSH = 2, MZ_FULL_FLUSH = 3, MZ_FINISH = 4, MZ_BLOCK = 5 };
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// Return status codes. MZ_PARAM_ERROR is non-standard.
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enum { MZ_OK = 0, MZ_STREAM_END = 1, MZ_NEED_DICT = 2, MZ_ERRNO = -1, MZ_STREAM_ERROR = -2, MZ_DATA_ERROR = -3, MZ_MEM_ERROR = -4, MZ_BUF_ERROR = -5, MZ_VERSION_ERROR = -6, MZ_PARAM_ERROR = -10000 };
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// Compression levels.
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enum { MZ_NO_COMPRESSION = 0, MZ_BEST_SPEED = 1, MZ_BEST_COMPRESSION = 9, MZ_DEFAULT_COMPRESSION = -1 };
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// Window bits
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#define MZ_DEFAULT_WINDOW_BITS 15
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struct mz_internal_state;
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// Compression/decompression stream struct.
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typedef struct mz_stream_s
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{
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const unsigned char *next_in; // pointer to next byte to read
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unsigned int avail_in; // number of bytes available at next_in
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mz_ulong total_in; // total number of bytes consumed so far
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unsigned char *next_out; // pointer to next byte to write
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unsigned int avail_out; // number of bytes that can be written to next_out
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mz_ulong total_out; // total number of bytes produced so far
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char *msg; // error msg (unused)
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struct mz_internal_state *state; // internal state, allocated by zalloc/zfree
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mz_alloc_func zalloc; // optional heap allocation function (defaults to malloc)
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mz_free_func zfree; // optional heap free function (defaults to free)
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void *opaque; // heap alloc function user pointer
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int data_type; // data_type (unused)
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mz_ulong adler; // adler32 of the source or uncompressed data
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mz_ulong reserved; // not used
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} mz_stream;
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typedef mz_stream *mz_streamp;
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// Returns the version string of miniz.c.
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const char *mz_version(void);
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// mz_deflateInit() initializes a compressor with default options:
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// Parameters:
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// pStream must point to an initialized mz_stream struct.
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// level must be between [MZ_NO_COMPRESSION, MZ_BEST_COMPRESSION].
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// level 1 enables a specially optimized compression function that's been optimized purely for performance, not ratio.
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// (This special func. is currently only enabled when MINIZ_USE_UNALIGNED_LOADS_AND_STORES and MINIZ_LITTLE_ENDIAN are defined.)
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// Return values:
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// MZ_OK on success.
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// MZ_STREAM_ERROR if the stream is bogus.
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// MZ_PARAM_ERROR if the input parameters are bogus.
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// MZ_MEM_ERROR on out of memory.
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int mz_deflateInit(mz_streamp pStream, int level);
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// mz_deflateInit2() is like mz_deflate(), except with more control:
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// Additional parameters:
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// method must be MZ_DEFLATED
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// window_bits must be MZ_DEFAULT_WINDOW_BITS (to wrap the deflate stream with zlib header/adler-32 footer) or -MZ_DEFAULT_WINDOW_BITS (raw deflate/no header or footer)
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// mem_level must be between [1, 9] (it's checked but ignored by miniz.c)
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int mz_deflateInit2(mz_streamp pStream, int level, int method, int window_bits, int mem_level, int strategy);
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// Quickly resets a compressor without having to reallocate anything. Same as calling mz_deflateEnd() followed by mz_deflateInit()/mz_deflateInit2().
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int mz_deflateReset(mz_streamp pStream);
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// mz_deflate() compresses the input to output, consuming as much of the input and producing as much output as possible.
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// Parameters:
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// pStream is the stream to read from and write to. You must initialize/update the next_in, avail_in, next_out, and avail_out members.
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// flush may be MZ_NO_FLUSH, MZ_PARTIAL_FLUSH/MZ_SYNC_FLUSH, MZ_FULL_FLUSH, or MZ_FINISH.
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// Return values:
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// MZ_OK on success (when flushing, or if more input is needed but not available, and/or there's more output to be written but the output buffer is full).
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// MZ_STREAM_END if all input has been consumed and all output bytes have been written. Don't call mz_deflate() on the stream anymore.
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// MZ_STREAM_ERROR if the stream is bogus.
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// MZ_PARAM_ERROR if one of the parameters is invalid.
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// MZ_BUF_ERROR if no forward progress is possible because the input and/or output buffers are empty. (Fill up the input buffer or free up some output space and try again.)
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int mz_deflate(mz_streamp pStream, int flush);
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// mz_deflateEnd() deinitializes a compressor:
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// Return values:
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// MZ_OK on success.
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// MZ_STREAM_ERROR if the stream is bogus.
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int mz_deflateEnd(mz_streamp pStream);
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// mz_deflateBound() returns a (very) conservative upper bound on the amount of data that could be generated by deflate(), assuming flush is set to only MZ_NO_FLUSH or MZ_FINISH.
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mz_ulong mz_deflateBound(mz_streamp pStream, mz_ulong source_len);
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// Single-call compression functions mz_compress() and mz_compress2():
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// Returns MZ_OK on success, or one of the error codes from mz_deflate() on failure.
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int mz_compress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len);
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int mz_compress2(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len, int level);
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// mz_compressBound() returns a (very) conservative upper bound on the amount of data that could be generated by calling mz_compress().
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mz_ulong mz_compressBound(mz_ulong source_len);
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// Initializes a decompressor.
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int mz_inflateInit(mz_streamp pStream);
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// mz_inflateInit2() is like mz_inflateInit() with an additional option that controls the window size and whether or not the stream has been wrapped with a zlib header/footer:
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// window_bits must be MZ_DEFAULT_WINDOW_BITS (to parse zlib header/footer) or -MZ_DEFAULT_WINDOW_BITS (raw deflate).
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int mz_inflateInit2(mz_streamp pStream, int window_bits);
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// Decompresses the input stream to the output, consuming only as much of the input as needed, and writing as much to the output as possible.
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// Parameters:
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// pStream is the stream to read from and write to. You must initialize/update the next_in, avail_in, next_out, and avail_out members.
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// flush may be MZ_NO_FLUSH, MZ_SYNC_FLUSH, or MZ_FINISH.
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// On the first call, if flush is MZ_FINISH it's assumed the input and output buffers are both sized large enough to decompress the entire stream in a single call (this is slightly faster).
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// MZ_FINISH implies that there are no more source bytes available beside what's already in the input buffer, and that the output buffer is large enough to hold the rest of the decompressed data.
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// Return values:
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// MZ_OK on success. Either more input is needed but not available, and/or there's more output to be written but the output buffer is full.
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// MZ_STREAM_END if all needed input has been consumed and all output bytes have been written. For zlib streams, the adler-32 of the decompressed data has also been verified.
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// MZ_STREAM_ERROR if the stream is bogus.
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// MZ_DATA_ERROR if the deflate stream is invalid.
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// MZ_PARAM_ERROR if one of the parameters is invalid.
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// MZ_BUF_ERROR if no forward progress is possible because the input buffer is empty but the inflater needs more input to continue, or if the output buffer is not large enough. Call mz_inflate() again
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// with more input data, or with more room in the output buffer (except when using single call decompression, described above).
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int mz_inflate(mz_streamp pStream, int flush);
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// Deinitializes a decompressor.
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int mz_inflateEnd(mz_streamp pStream);
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// Single-call decompression.
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// Returns MZ_OK on success, or one of the error codes from mz_inflate() on failure.
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int mz_uncompress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len);
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// Returns a string description of the specified error code, or NULL if the error code is invalid.
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const char *mz_error(int err);
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// Redefine zlib-compatible names to miniz equivalents, so miniz.c can be used as a drop-in replacement for the subset of zlib that miniz.c supports.
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// Define MINIZ_NO_ZLIB_COMPATIBLE_NAMES to disable zlib-compatibility if you use zlib in the same project.
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#ifndef MINIZ_NO_ZLIB_COMPATIBLE_NAMES
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typedef unsigned char Byte;
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typedef unsigned int uInt;
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typedef mz_ulong uLong;
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typedef Byte Bytef;
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typedef uInt uIntf;
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typedef char charf;
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typedef int intf;
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typedef void *voidpf;
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typedef uLong uLongf;
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typedef void *voidp;
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typedef void *const voidpc;
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#define Z_NULL 0
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#define Z_NO_FLUSH MZ_NO_FLUSH
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#define Z_PARTIAL_FLUSH MZ_PARTIAL_FLUSH
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#define Z_SYNC_FLUSH MZ_SYNC_FLUSH
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|
#define Z_FULL_FLUSH MZ_FULL_FLUSH
|
|
#define Z_FINISH MZ_FINISH
|
|
#define Z_BLOCK MZ_BLOCK
|
|
#define Z_OK MZ_OK
|
|
#define Z_STREAM_END MZ_STREAM_END
|
|
#define Z_NEED_DICT MZ_NEED_DICT
|
|
#define Z_ERRNO MZ_ERRNO
|
|
#define Z_STREAM_ERROR MZ_STREAM_ERROR
|
|
#define Z_DATA_ERROR MZ_DATA_ERROR
|
|
#define Z_MEM_ERROR MZ_MEM_ERROR
|
|
#define Z_BUF_ERROR MZ_BUF_ERROR
|
|
#define Z_VERSION_ERROR MZ_VERSION_ERROR
|
|
#define Z_PARAM_ERROR MZ_PARAM_ERROR
|
|
#define Z_NO_COMPRESSION MZ_NO_COMPRESSION
|
|
#define Z_BEST_SPEED MZ_BEST_SPEED
|
|
#define Z_BEST_COMPRESSION MZ_BEST_COMPRESSION
|
|
#define Z_DEFAULT_COMPRESSION MZ_DEFAULT_COMPRESSION
|
|
#define Z_DEFAULT_STRATEGY MZ_DEFAULT_STRATEGY
|
|
#define Z_FILTERED MZ_FILTERED
|
|
#define Z_HUFFMAN_ONLY MZ_HUFFMAN_ONLY
|
|
#define Z_RLE MZ_RLE
|
|
#define Z_FIXED MZ_FIXED
|
|
#define Z_DEFLATED MZ_DEFLATED
|
|
#define Z_DEFAULT_WINDOW_BITS MZ_DEFAULT_WINDOW_BITS
|
|
#define alloc_func mz_alloc_func
|
|
#define free_func mz_free_func
|
|
#define internal_state mz_internal_state
|
|
#define z_stream mz_stream
|
|
#define deflateInit mz_deflateInit
|
|
#define deflateInit2 mz_deflateInit2
|
|
#define deflateReset mz_deflateReset
|
|
#define deflate mz_deflate
|
|
#define deflateEnd mz_deflateEnd
|
|
#define deflateBound mz_deflateBound
|
|
#define compress mz_compress
|
|
#define compress2 mz_compress2
|
|
#define compressBound mz_compressBound
|
|
#define inflateInit mz_inflateInit
|
|
#define inflateInit2 mz_inflateInit2
|
|
#define inflate mz_inflate
|
|
#define inflateEnd mz_inflateEnd
|
|
#define uncompress mz_uncompress
|
|
#define crc32 mz_crc32
|
|
#define adler32 mz_adler32
|
|
#define MAX_WBITS 15
|
|
#define MAX_MEM_LEVEL 9
|
|
#define zError mz_error
|
|
#define ZLIB_VERSION MZ_VERSION
|
|
#define ZLIB_VERNUM MZ_VERNUM
|
|
#define ZLIB_VER_MAJOR MZ_VER_MAJOR
|
|
#define ZLIB_VER_MINOR MZ_VER_MINOR
|
|
#define ZLIB_VER_REVISION MZ_VER_REVISION
|
|
#define ZLIB_VER_SUBREVISION MZ_VER_SUBREVISION
|
|
#define zlibVersion mz_version
|
|
#define zlib_version mz_version()
|
|
#endif // #ifndef MINIZ_NO_ZLIB_COMPATIBLE_NAMES
|
|
|
|
#endif // MINIZ_NO_ZLIB_APIS
|
|
|
|
// ------------------- Types and macros
|
|
|
|
typedef unsigned char mz_uint8;
|
|
typedef signed short mz_int16;
|
|
typedef unsigned short mz_uint16;
|
|
typedef unsigned int mz_uint32;
|
|
typedef unsigned int mz_uint;
|
|
typedef long long mz_int64;
|
|
typedef unsigned long long mz_uint64;
|
|
typedef int mz_bool;
|
|
|
|
#define MZ_FALSE (0)
|
|
#define MZ_TRUE (1)
|
|
|
|
// Works around MSVC's spammy "warning C4127: conditional expression is constant" message.
|
|
#define MZ_MACRO_END while (0, 0)
|
|
|
|
// ------------------- ZIP archive reading/writing
|
|
|
|
#ifndef MINIZ_NO_ARCHIVE_APIS
|
|
|
|
enum
|
|
{
|
|
MZ_ZIP_MAX_IO_BUF_SIZE = 64*1024,
|
|
MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE = 260,
|
|
MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE = 256
|
|
};
|
|
|
|
typedef struct
|
|
{
|
|
mz_uint32 m_file_index;
|
|
mz_uint32 m_central_dir_ofs;
|
|
mz_uint16 m_version_made_by;
|
|
mz_uint16 m_version_needed;
|
|
mz_uint16 m_bit_flag;
|
|
mz_uint16 m_method;
|
|
#ifndef MINIZ_NO_TIME
|
|
time_t m_time;
|
|
#endif
|
|
mz_uint32 m_crc32;
|
|
mz_uint64 m_comp_size;
|
|
mz_uint64 m_uncomp_size;
|
|
mz_uint16 m_internal_attr;
|
|
mz_uint32 m_external_attr;
|
|
mz_uint64 m_local_header_ofs;
|
|
mz_uint32 m_comment_size;
|
|
char m_filename[MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE];
|
|
char m_comment[MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE];
|
|
} mz_zip_archive_file_stat;
|
|
|
|
typedef size_t (*mz_file_read_func)(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n);
|
|
typedef size_t (*mz_file_write_func)(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n);
|
|
|
|
struct mz_zip_internal_state_tag;
|
|
typedef struct mz_zip_internal_state_tag mz_zip_internal_state;
|
|
|
|
typedef enum
|
|
{
|
|
MZ_ZIP_MODE_INVALID = 0,
|
|
MZ_ZIP_MODE_READING = 1,
|
|
MZ_ZIP_MODE_WRITING = 2,
|
|
MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED = 3
|
|
} mz_zip_mode;
|
|
|
|
typedef struct
|
|
{
|
|
mz_uint64 m_archive_size;
|
|
mz_uint64 m_central_directory_file_ofs;
|
|
mz_uint m_total_files;
|
|
mz_zip_mode m_zip_mode;
|
|
|
|
mz_uint m_file_offset_alignment;
|
|
|
|
mz_alloc_func m_pAlloc;
|
|
mz_free_func m_pFree;
|
|
mz_realloc_func m_pRealloc;
|
|
void *m_pAlloc_opaque;
|
|
|
|
mz_file_read_func m_pRead;
|
|
mz_file_write_func m_pWrite;
|
|
void *m_pIO_opaque;
|
|
|
|
mz_zip_internal_state *m_pState;
|
|
|
|
} mz_zip_archive;
|
|
|
|
typedef enum
|
|
{
|
|
MZ_ZIP_FLAG_CASE_SENSITIVE = 0x0100,
|
|
MZ_ZIP_FLAG_IGNORE_PATH = 0x0200,
|
|
MZ_ZIP_FLAG_COMPRESSED_DATA = 0x0400,
|
|
MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY = 0x0800
|
|
} mz_zip_flags;
|
|
|
|
// ZIP archive reading
|
|
|
|
// Inits a ZIP archive reader.
|
|
// These functions read and validate the archive's central directory.
|
|
mz_bool mz_zip_reader_init(mz_zip_archive *pZip, mz_uint64 size, mz_uint32 flags);
|
|
mz_bool mz_zip_reader_init_mem(mz_zip_archive *pZip, const void *pMem, size_t size, mz_uint32 flags);
|
|
|
|
#ifndef MINIZ_NO_STDIO
|
|
mz_bool mz_zip_reader_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint32 flags);
|
|
#endif
|
|
|
|
// Returns the total number of files in the archive.
|
|
mz_uint mz_zip_reader_get_num_files(mz_zip_archive *pZip);
|
|
|
|
// Returns detailed information about an archive file entry.
|
|
mz_bool mz_zip_reader_file_stat(mz_zip_archive *pZip, mz_uint file_index, mz_zip_archive_file_stat *pStat);
|
|
|
|
// Determines if an archive file entry is a directory entry.
|
|
mz_bool mz_zip_reader_is_file_a_directory(mz_zip_archive *pZip, mz_uint file_index);
|
|
mz_bool mz_zip_reader_is_file_encrypted(mz_zip_archive *pZip, mz_uint file_index);
|
|
|
|
// Retrieves the filename of an archive file entry.
|
|
// Returns the number of bytes written to pFilename, or if filename_buf_size is 0 this function returns the number of bytes needed to fully store the filename.
|
|
mz_uint mz_zip_reader_get_filename(mz_zip_archive *pZip, mz_uint file_index, char *pFilename, mz_uint filename_buf_size);
|
|
|
|
// Attempts to locates a file in the archive's central directory.
|
|
// Valid flags: MZ_ZIP_FLAG_CASE_SENSITIVE, MZ_ZIP_FLAG_IGNORE_PATH
|
|
// Returns -1 if the file cannot be found.
|
|
int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags);
|
|
|
|
// Extracts a archive file to a memory buffer using no memory allocation.
|
|
mz_bool mz_zip_reader_extract_to_mem_no_alloc(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size);
|
|
mz_bool mz_zip_reader_extract_file_to_mem_no_alloc(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags, void *pUser_read_buf, size_t user_read_buf_size);
|
|
|
|
// Extracts a archive file to a memory buffer.
|
|
mz_bool mz_zip_reader_extract_to_mem(mz_zip_archive *pZip, mz_uint file_index, void *pBuf, size_t buf_size, mz_uint flags);
|
|
mz_bool mz_zip_reader_extract_file_to_mem(mz_zip_archive *pZip, const char *pFilename, void *pBuf, size_t buf_size, mz_uint flags);
|
|
|
|
// Extracts a archive file to a dynamically allocated heap buffer.
|
|
void *mz_zip_reader_extract_to_heap(mz_zip_archive *pZip, mz_uint file_index, size_t *pSize, mz_uint flags);
|
|
void *mz_zip_reader_extract_file_to_heap(mz_zip_archive *pZip, const char *pFilename, size_t *pSize, mz_uint flags);
|
|
|
|
// Extracts a archive file using a callback function to output the file's data.
|
|
mz_bool mz_zip_reader_extract_to_callback(mz_zip_archive *pZip, mz_uint file_index, mz_file_write_func pCallback, void *pOpaque, mz_uint flags);
|
|
mz_bool mz_zip_reader_extract_file_to_callback(mz_zip_archive *pZip, const char *pFilename, mz_file_write_func pCallback, void *pOpaque, mz_uint flags);
|
|
|
|
#ifndef MINIZ_NO_STDIO
|
|
// Extracts a archive file to a disk file and sets its last accessed and modified times.
|
|
// This function only extracts files, not archive directory records.
|
|
mz_bool mz_zip_reader_extract_to_file(mz_zip_archive *pZip, mz_uint file_index, const char *pDst_filename, mz_uint flags);
|
|
mz_bool mz_zip_reader_extract_file_to_file(mz_zip_archive *pZip, const char *pArchive_filename, const char *pDst_filename, mz_uint flags);
|
|
#endif
|
|
|
|
// Ends archive reading, freeing all allocations, and closing the input archive file if mz_zip_reader_init_file() was used.
|
|
mz_bool mz_zip_reader_end(mz_zip_archive *pZip);
|
|
|
|
// ZIP archive writing
|
|
|
|
#ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
|
|
|
|
// Inits a ZIP archive writer.
|
|
mz_bool mz_zip_writer_init(mz_zip_archive *pZip, mz_uint64 existing_size);
|
|
mz_bool mz_zip_writer_init_heap(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size);
|
|
|
|
#ifndef MINIZ_NO_STDIO
|
|
mz_bool mz_zip_writer_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning);
|
|
#endif
|
|
|
|
// Converts a ZIP archive reader object into a writer object, to allow efficient in-place file appends to occur on an existing archive.
|
|
// For archives opened using mz_zip_reader_init_file, pFilename must be the archive's filename so it can be reopened for writing. If the file can't be reopened, mz_zip_reader_end() will be called.
|
|
// For archives opened using mz_zip_reader_init_mem, the memory block must be growable using the realloc callback (which defaults to realloc unless you've overridden it).
|
|
// Finally, for archives opened using mz_zip_reader_init, the mz_zip_archive's user provided m_pWrite function cannot be NULL.
|
|
// Note: In-place archive modification is not recommended unless you know what you're doing, because if execution stops or something goes wrong before
|
|
// the archive is finalized the file's central directory will be hosed.
|
|
mz_bool mz_zip_writer_init_from_reader(mz_zip_archive *pZip, const char *pFilename);
|
|
|
|
// Adds the contents of a memory buffer to an archive. These functions record the current local time into the archive.
|
|
// To add a directory entry, call this method with an archive name ending in a forwardslash with empty buffer.
|
|
mz_bool mz_zip_writer_add_mem(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, mz_uint level_and_flags);
|
|
mz_bool mz_zip_writer_add_mem_ex(mz_zip_archive *pZip, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags, mz_uint64 uncomp_size, mz_uint32 uncomp_crc32);
|
|
|
|
#ifndef MINIZ_NO_STDIO
|
|
// Adds the contents of a disk file to an archive. This function also records the disk file's modified time into the archive.
|
|
mz_bool mz_zip_writer_add_file(mz_zip_archive *pZip, const char *pArchive_name, const char *pSrc_filename, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags);
|
|
#endif
|
|
|
|
// Adds a file to an archive by fully cloning the data from another archive.
|
|
// This function fully clones the source file's compressed data (no recompression), along with its full filename, extra data, and comment fields.
|
|
mz_bool mz_zip_writer_add_from_zip_reader(mz_zip_archive *pZip, mz_zip_archive *pSource_zip, mz_uint file_index);
|
|
|
|
// Finalizes the archive by writing the central directory records followed by the end of central directory record.
|
|
// After an archive is finalized, the only valid call on the mz_zip_archive struct is mz_zip_writer_end().
|
|
// An archive must be manually finalized by calling this function for it to be valid.
|
|
mz_bool mz_zip_writer_finalize_archive(mz_zip_archive *pZip);
|
|
mz_bool mz_zip_writer_finalize_heap_archive(mz_zip_archive *pZip, void **pBuf, size_t *pSize);
|
|
|
|
// Ends archive writing, freeing all allocations, and closing the output file if mz_zip_writer_init_file() was used.
|
|
// Note for the archive to be valid, it must have been finalized before ending.
|
|
mz_bool mz_zip_writer_end(mz_zip_archive *pZip);
|
|
|
|
// Misc. high-level helper functions:
|
|
|
|
// mz_zip_add_mem_to_archive_file_in_place() efficiently (but not atomically) appends a memory blob to a ZIP archive.
|
|
mz_bool mz_zip_add_mem_to_archive_file_in_place(const char *pZip_filename, const char *pArchive_name, const void *pBuf, size_t buf_size, const void *pComment, mz_uint16 comment_size, mz_uint level_and_flags);
|
|
|
|
// Reads a single file from an archive into a heap block.
|
|
// Returns NULL on failure.
|
|
void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name, size_t *pSize, mz_uint zip_flags);
|
|
|
|
#endif // #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
|
|
|
|
#endif // #ifndef MINIZ_NO_ARCHIVE_APIS
|
|
|
|
// ------------------- Low-level Decompression API Definitions
|
|
|
|
// Decompression flags.
|
|
enum
|
|
{
|
|
TINFL_FLAG_PARSE_ZLIB_HEADER = 1,
|
|
TINFL_FLAG_HAS_MORE_INPUT = 2,
|
|
TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF = 4,
|
|
TINFL_FLAG_COMPUTE_ADLER32 = 8
|
|
};
|
|
|
|
// High level decompression functions:
|
|
// tinfl_decompress_mem_to_heap() decompresses a block in memory to a heap block allocated via malloc().
|
|
// On entry:
|
|
// pSrc_buf, src_buf_len: Pointer and size of the Deflate or zlib source data to decompress.
|
|
// On return:
|
|
// Function returns a pointer to the decompressed data, or NULL on failure.
|
|
// *pOut_len will be set to the decompressed data's size, which could be larger than src_buf_len on uncompressible data.
|
|
// The caller must free() the returned block when it's no longer needed.
|
|
void *tinfl_decompress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags);
|
|
|
|
// tinfl_decompress_mem_to_mem() decompresses a block in memory to another block in memory.
|
|
// Returns TINFL_DECOMPRESS_MEM_TO_MEM_FAILED on failure, or the number of bytes written on success.
|
|
#define TINFL_DECOMPRESS_MEM_TO_MEM_FAILED ((size_t)(-1))
|
|
size_t tinfl_decompress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags);
|
|
|
|
// tinfl_decompress_mem_to_callback() decompresses a block in memory to an internal 32KB buffer, and a user provided callback function will be called to flush the buffer.
|
|
// Returns 1 on success or 0 on failure.
|
|
typedef int (*tinfl_put_buf_func_ptr)(const void* pBuf, int len, void *pUser);
|
|
int tinfl_decompress_mem_to_callback(const void *pIn_buf, size_t *pIn_buf_size, tinfl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags);
|
|
|
|
struct tinfl_decompressor_tag; typedef struct tinfl_decompressor_tag tinfl_decompressor;
|
|
|
|
// Max size of LZ dictionary.
|
|
#define TINFL_LZ_DICT_SIZE 32768
|
|
|
|
// Return status.
|
|
typedef enum
|
|
{
|
|
TINFL_STATUS_BAD_PARAM = -3,
|
|
TINFL_STATUS_ADLER32_MISMATCH = -2,
|
|
TINFL_STATUS_FAILED = -1,
|
|
TINFL_STATUS_DONE = 0,
|
|
TINFL_STATUS_NEEDS_MORE_INPUT = 1,
|
|
TINFL_STATUS_HAS_MORE_OUTPUT = 2
|
|
} tinfl_status;
|
|
|
|
// Initializes the decompressor to its initial state.
|
|
#define tinfl_init(r) do { (r)->m_state = 0; } MZ_MACRO_END
|
|
#define tinfl_get_adler32(r) (r)->m_check_adler32
|
|
|
|
// Main low-level decompressor coroutine function. This is the only function actually needed for decompression. All the other functions are just high-level helpers for improved usability.
|
|
// This is a universal API, i.e. it can be used as a building block to build any desired higher level decompression API. In the limit case, it can be called once per every byte input or output.
|
|
tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_next, size_t *pIn_buf_size, mz_uint8 *pOut_buf_start, mz_uint8 *pOut_buf_next, size_t *pOut_buf_size, const mz_uint32 decomp_flags);
|
|
|
|
// Internal/private bits follow.
|
|
enum
|
|
{
|
|
TINFL_MAX_HUFF_TABLES = 3, TINFL_MAX_HUFF_SYMBOLS_0 = 288, TINFL_MAX_HUFF_SYMBOLS_1 = 32, TINFL_MAX_HUFF_SYMBOLS_2 = 19,
|
|
TINFL_FAST_LOOKUP_BITS = 10, TINFL_FAST_LOOKUP_SIZE = 1 << TINFL_FAST_LOOKUP_BITS
|
|
};
|
|
|
|
typedef struct
|
|
{
|
|
mz_uint8 m_code_size[TINFL_MAX_HUFF_SYMBOLS_0];
|
|
mz_int16 m_look_up[TINFL_FAST_LOOKUP_SIZE], m_tree[TINFL_MAX_HUFF_SYMBOLS_0 * 2];
|
|
} tinfl_huff_table;
|
|
|
|
#if MINIZ_HAS_64BIT_REGISTERS
|
|
#define TINFL_USE_64BIT_BITBUF 1
|
|
#endif
|
|
|
|
#if TINFL_USE_64BIT_BITBUF
|
|
typedef mz_uint64 tinfl_bit_buf_t;
|
|
#define TINFL_BITBUF_SIZE (64)
|
|
#else
|
|
typedef mz_uint32 tinfl_bit_buf_t;
|
|
#define TINFL_BITBUF_SIZE (32)
|
|
#endif
|
|
|
|
struct tinfl_decompressor_tag
|
|
{
|
|
mz_uint32 m_state, m_num_bits, m_zhdr0, m_zhdr1, m_z_adler32, m_final, m_type, m_check_adler32, m_dist, m_counter, m_num_extra, m_table_sizes[TINFL_MAX_HUFF_TABLES];
|
|
tinfl_bit_buf_t m_bit_buf;
|
|
size_t m_dist_from_out_buf_start;
|
|
tinfl_huff_table m_tables[TINFL_MAX_HUFF_TABLES];
|
|
mz_uint8 m_raw_header[4], m_len_codes[TINFL_MAX_HUFF_SYMBOLS_0 + TINFL_MAX_HUFF_SYMBOLS_1 + 137];
|
|
};
|
|
|
|
// ------------------- Low-level Compression API Definitions
|
|
|
|
// Set TDEFL_LESS_MEMORY to 1 to use less memory (compression will be slightly slower, and raw/dynamic blocks will be output more frequently).
|
|
#define TDEFL_LESS_MEMORY 0
|
|
|
|
// Compression flags logically OR'd together (low 12 bits contain the max. number of probes per dictionary search):
|
|
// TDEFL_DEFAULT_MAX_PROBES: The compressor defaults to 128 dictionary probes per dictionary search. 0=Huffman only, 1=Huffman+LZ (fastest/crap compression), 4095=Huffman+LZ (slowest/best compression).
|
|
enum
|
|
{
|
|
TDEFL_HUFFMAN_ONLY = 0, TDEFL_DEFAULT_MAX_PROBES = 128, TDEFL_MAX_PROBES_MASK = 0xFFF
|
|
};
|
|
// TDEFL_WRITE_ZLIB_HEADER: If set, the compressor outputs a zlib header before the deflate data, and the Adler-32 of the source data at the end. Otherwise, you'll get raw deflate data.
|
|
// TDEFL_COMPUTE_ADLER32: Always compute the adler-32 of the input data (even when not writing zlib headers).
|
|
// TDEFL_GREEDY_PARSING_FLAG: Set to use faster greedy parsing, instead of more efficient lazy parsing.
|
|
// TDEFL_NONDETERMINISTIC_PARSING_FLAG: Enable to decrease the compressor's initialization time to the minimum, but the output may vary from run to run given the same input (depending on the contents of memory).
|
|
// TDEFL_FORCE_ALL_STATIC_BLOCKS: Disable usage of optimized Huffman tables.
|
|
enum
|
|
{
|
|
TDEFL_WRITE_ZLIB_HEADER = 0x01000,
|
|
TDEFL_COMPUTE_ADLER32 = 0x02000,
|
|
TDEFL_GREEDY_PARSING_FLAG = 0x04000,
|
|
TDEFL_NONDETERMINISTIC_PARSING_FLAG = 0x08000,
|
|
TDEFL_RLE_MATCHES = 0x10000,
|
|
TDEFL_FILTER_MATCHES = 0x20000,
|
|
TDEFL_FORCE_ALL_STATIC_BLOCKS = 0x40000,
|
|
TDEFL_FORCE_ALL_RAW_BLOCKS = 0x80000
|
|
};
|
|
|
|
// High level compression functions:
|
|
// tdefl_compress_mem_to_heap() compresses a block in memory to a heap block allocated via malloc().
|
|
// On entry:
|
|
// pSrc_buf, src_buf_len: Pointer and size of source block to compress.
|
|
// flags: The max match finder probes (default is 128) logically OR'd against the above flags. Higher probes are slower but improve compression.
|
|
// On return:
|
|
// Function returns a pointer to the compressed data, or NULL on failure.
|
|
// *pOut_len will be set to the compressed data's size, which could be larger than src_buf_len on uncompressible data.
|
|
// The caller must free() the returned block when it's no longer needed.
|
|
void *tdefl_compress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags);
|
|
|
|
// tdefl_compress_mem_to_mem() compresses a block in memory to another block in memory.
|
|
// Returns 0 on failure.
|
|
size_t tdefl_compress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags);
|
|
|
|
// Compresses an image to a compressed PNG file in memory.
|
|
// On entry:
|
|
// pImage, w, h, and num_chans describe the image to compress. num_chans may be 1, 2, 3, or 4.
|
|
// On return:
|
|
// Function returns a pointer to the compressed data, or NULL on failure.
|
|
// *pLen_out will be set to the size of the PNG image file.
|
|
// The caller must free() the returned heap block (which will typically be larger than *pLen_out) when it's no longer needed.
|
|
void *tdefl_write_image_to_png_file_in_memory(const void *pImage, int w, int h, int num_chans, size_t *pLen_out);
|
|
|
|
// Output stream interface. The compressor uses this interface to write compressed data. It'll typically be called TDEFL_OUT_BUF_SIZE at a time.
|
|
typedef mz_bool (*tdefl_put_buf_func_ptr)(const void* pBuf, int len, void *pUser);
|
|
|
|
// tdefl_compress_mem_to_output() compresses a block to an output stream. The above helpers use this function internally.
|
|
mz_bool tdefl_compress_mem_to_output(const void *pBuf, size_t buf_len, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags);
|
|
|
|
enum { TDEFL_MAX_HUFF_TABLES = 3, TDEFL_MAX_HUFF_SYMBOLS_0 = 288, TDEFL_MAX_HUFF_SYMBOLS_1 = 32, TDEFL_MAX_HUFF_SYMBOLS_2 = 19, TDEFL_LZ_DICT_SIZE = 32768, TDEFL_LZ_DICT_SIZE_MASK = TDEFL_LZ_DICT_SIZE - 1, TDEFL_MIN_MATCH_LEN = 3, TDEFL_MAX_MATCH_LEN = 258 };
|
|
|
|
// TDEFL_OUT_BUF_SIZE MUST be large enough to hold a single entire compressed output block (using static/fixed Huffman codes).
|
|
#if TDEFL_LESS_MEMORY
|
|
enum { TDEFL_LZ_CODE_BUF_SIZE = 24 * 1024, TDEFL_OUT_BUF_SIZE = (TDEFL_LZ_CODE_BUF_SIZE * 13 ) / 10, TDEFL_MAX_HUFF_SYMBOLS = 288, TDEFL_LZ_HASH_BITS = 12, TDEFL_LEVEL1_HASH_SIZE_MASK = 4095, TDEFL_LZ_HASH_SHIFT = (TDEFL_LZ_HASH_BITS + 2) / 3, TDEFL_LZ_HASH_SIZE = 1 << TDEFL_LZ_HASH_BITS };
|
|
#else
|
|
enum { TDEFL_LZ_CODE_BUF_SIZE = 64 * 1024, TDEFL_OUT_BUF_SIZE = (TDEFL_LZ_CODE_BUF_SIZE * 13 ) / 10, TDEFL_MAX_HUFF_SYMBOLS = 288, TDEFL_LZ_HASH_BITS = 15, TDEFL_LEVEL1_HASH_SIZE_MASK = 4095, TDEFL_LZ_HASH_SHIFT = (TDEFL_LZ_HASH_BITS + 2) / 3, TDEFL_LZ_HASH_SIZE = 1 << TDEFL_LZ_HASH_BITS };
|
|
#endif
|
|
|
|
// The low-level tdefl functions below may be used directly if the above helper functions aren't flexible enough. The low-level functions don't make any heap allocations, unlike the above helper functions.
|
|
typedef enum
|
|
{
|
|
TDEFL_STATUS_BAD_PARAM = -2,
|
|
TDEFL_STATUS_PUT_BUF_FAILED = -1,
|
|
TDEFL_STATUS_OKAY = 0,
|
|
TDEFL_STATUS_DONE = 1,
|
|
} tdefl_status;
|
|
|
|
// Must map to MZ_NO_FLUSH, MZ_SYNC_FLUSH, etc. enums
|
|
typedef enum
|
|
{
|
|
TDEFL_NO_FLUSH = 0,
|
|
TDEFL_SYNC_FLUSH = 2,
|
|
TDEFL_FULL_FLUSH = 3,
|
|
TDEFL_FINISH = 4
|
|
} tdefl_flush;
|
|
|
|
typedef struct
|
|
{
|
|
tdefl_put_buf_func_ptr m_pPut_buf_func;
|
|
void *m_pPut_buf_user;
|
|
mz_uint m_flags, m_max_probes[2];
|
|
int m_greedy_parsing;
|
|
mz_uint m_adler32, m_lookahead_pos, m_lookahead_size, m_dict_size;
|
|
mz_uint8 *m_pLZ_code_buf, *m_pLZ_flags, *m_pOutput_buf, *m_pOutput_buf_end;
|
|
mz_uint m_num_flags_left, m_total_lz_bytes, m_lz_code_buf_dict_pos, m_bits_in, m_bit_buffer;
|
|
mz_uint m_saved_match_dist, m_saved_match_len, m_saved_lit, m_output_flush_ofs, m_output_flush_remaining, m_finished, m_block_index, m_wants_to_finish;
|
|
tdefl_status m_prev_return_status;
|
|
const void *m_pIn_buf;
|
|
void *m_pOut_buf;
|
|
size_t *m_pIn_buf_size, *m_pOut_buf_size;
|
|
tdefl_flush m_flush;
|
|
const mz_uint8 *m_pSrc;
|
|
size_t m_src_buf_left, m_out_buf_ofs;
|
|
mz_uint8 m_dict[TDEFL_LZ_DICT_SIZE + TDEFL_MAX_MATCH_LEN - 1];
|
|
mz_uint16 m_huff_count[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS];
|
|
mz_uint16 m_huff_codes[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS];
|
|
mz_uint8 m_huff_code_sizes[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS];
|
|
mz_uint8 m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE];
|
|
mz_uint16 m_next[TDEFL_LZ_DICT_SIZE];
|
|
mz_uint16 m_hash[TDEFL_LZ_HASH_SIZE];
|
|
mz_uint8 m_output_buf[TDEFL_OUT_BUF_SIZE];
|
|
} tdefl_compressor;
|
|
|
|
// Initializes the compressor.
|
|
tdefl_status tdefl_init(tdefl_compressor *d, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags);
|
|
|
|
// Compresses a block of data, consuming as much of the input as possible, and writing as much compressed data as possible.
|
|
tdefl_status tdefl_compress(tdefl_compressor *d, const void *pIn_buf, size_t *pIn_buf_size, void *pOut_buf, size_t *pOut_buf_size, tdefl_flush flush);
|
|
// tdefl_compress_buffer() is only usable when the tdefl_init() is called with a valid tdefl_put_buf_func_ptr.
|
|
// tdefl_compress_buffer() always consumes the entire input buffer.
|
|
tdefl_status tdefl_compress_buffer(tdefl_compressor *d, const void *pIn_buf, size_t in_buf_size, tdefl_flush flush);
|
|
|
|
tdefl_status tdefl_get_prev_return_status(tdefl_compressor *d);
|
|
mz_uint32 tdefl_get_adler32(tdefl_compressor *d);
|
|
|
|
// Create tdefl_compress() flags given zlib-style compression parameters.
|
|
// level may range from [0,10] (where 10 is absolute max compression, but may be much slower on some files)
|
|
// window_bits may be -15 (raw deflate) or 15 (zlib)
|
|
// strategy may be either MZ_DEFAULT_STRATEGY, MZ_FILTERED, MZ_HUFFMAN_ONLY, MZ_RLE, or MZ_FIXED
|
|
mz_uint tdefl_create_comp_flags_from_zip_params(int level, int window_bits, int strategy);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif // MINIZ_HEADER_INCLUDED
|
|
|
|
// ------------------- End of Header: Implementation follows. (If you only want the header, define MINIZ_HEADER_FILE_ONLY.)
|
|
|
|
#ifndef MINIZ_HEADER_FILE_ONLY
|
|
|
|
typedef unsigned char mz_validate_uint16[sizeof(mz_uint16)==2 ? 1 : -1];
|
|
typedef unsigned char mz_validate_uint32[sizeof(mz_uint32)==4 ? 1 : -1];
|
|
typedef unsigned char mz_validate_uint64[sizeof(mz_uint64)==8 ? 1 : -1];
|
|
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
|
|
#define MZ_ASSERT(x) assert(x)
|
|
|
|
#ifdef MINIZ_NO_MALLOC
|
|
#define MZ_MALLOC(x) NULL
|
|
#define MZ_FREE(x) x, ((void)0)
|
|
#define MZ_REALLOC(p, x) NULL
|
|
#else
|
|
#define MZ_MALLOC(x) malloc(x)
|
|
#define MZ_FREE(x) free(x)
|
|
#define MZ_REALLOC(p, x) realloc(p, x)
|
|
#endif
|
|
|
|
#define MZ_MAX(a,b) (((a)>(b))?(a):(b))
|
|
#define MZ_MIN(a,b) (((a)<(b))?(a):(b))
|
|
#define MZ_CLEAR_OBJ(obj) memset(&(obj), 0, sizeof(obj))
|
|
|
|
#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN
|
|
#define MZ_READ_LE16(p) *((const mz_uint16 *)(p))
|
|
#define MZ_READ_LE32(p) *((const mz_uint32 *)(p))
|
|
#else
|
|
#define MZ_READ_LE16(p) ((mz_uint32)(((const mz_uint8 *)(p))[0]) | ((mz_uint32)(((const mz_uint8 *)(p))[1]) << 8U))
|
|
#define MZ_READ_LE32(p) ((mz_uint32)(((const mz_uint8 *)(p))[0]) | ((mz_uint32)(((const mz_uint8 *)(p))[1]) << 8U) | ((mz_uint32)(((const mz_uint8 *)(p))[2]) << 16U) | ((mz_uint32)(((const mz_uint8 *)(p))[3]) << 24U))
|
|
#endif
|
|
|
|
#if !defined(_MSC_VER) && !defined(__MINGW32__) && !defined(__MINGW64__) && !defined(__forceinline)
|
|
#ifdef __cplusplus
|
|
#define __forceinline inline
|
|
#else
|
|
#define __forceinline
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// ------------------- zlib-style API's
|
|
|
|
static void *def_alloc_func(void *opaque, size_t items, size_t size) { (void)opaque; return MZ_MALLOC(items * size); }
|
|
static void def_free_func(void *opaque, void *address) { (void)opaque, MZ_FREE(address); }
|
|
static void *def_realloc_func(void *opaque, void *address, size_t items, size_t size) { (void)opaque; return MZ_REALLOC(address, items * size); }
|
|
|
|
mz_ulong mz_adler32(mz_ulong adler, const unsigned char *ptr, size_t buf_len)
|
|
{
|
|
mz_uint32 i, s1 = (mz_uint32)(adler & 0xffff), s2 = (mz_uint32)(adler >> 16); size_t block_len = buf_len % 5552;
|
|
if (!ptr) return MZ_ADLER32_INIT;
|
|
while (buf_len) {
|
|
for (i = 0; i + 7 < block_len; i += 8, ptr += 8) {
|
|
s1 += ptr[0], s2 += s1; s1 += ptr[1], s2 += s1; s1 += ptr[2], s2 += s1; s1 += ptr[3], s2 += s1;
|
|
s1 += ptr[4], s2 += s1; s1 += ptr[5], s2 += s1; s1 += ptr[6], s2 += s1; s1 += ptr[7], s2 += s1;
|
|
}
|
|
for ( ; i < block_len; ++i) s1 += *ptr++, s2 += s1;
|
|
s1 %= 65521U, s2 %= 65521U; buf_len -= block_len; block_len = 5552;
|
|
}
|
|
return (s2 << 16) + s1;
|
|
}
|
|
|
|
// Karl Malbrain's compact CRC-32. See "A compact CCITT crc16 and crc32 C implementation that balances processor cache usage against speed": http://www.geocities.com/malbrain/
|
|
mz_ulong mz_crc32(mz_ulong crc, const mz_uint8 *ptr, size_t buf_len)
|
|
{
|
|
static const mz_uint32 s_crc32[16] = { 0, 0x1db71064, 0x3b6e20c8, 0x26d930ac, 0x76dc4190, 0x6b6b51f4, 0x4db26158, 0x5005713c,
|
|
0xedb88320, 0xf00f9344, 0xd6d6a3e8, 0xcb61b38c, 0x9b64c2b0, 0x86d3d2d4, 0xa00ae278, 0xbdbdf21c };
|
|
if (!ptr) return MZ_CRC32_INIT;
|
|
crc = ~crc; while (buf_len--) { mz_uint8 b = *ptr++; crc = (crc >> 4) ^ s_crc32[(crc & 0xF) ^ (b & 0xF)]; crc = (crc >> 4) ^ s_crc32[(crc & 0xF) ^ (b >> 4)]; } return ~crc;
|
|
}
|
|
|
|
#ifndef MINIZ_NO_ZLIB_APIS
|
|
|
|
const char *mz_version(void)
|
|
{
|
|
return MZ_VERSION;
|
|
}
|
|
|
|
int mz_deflateInit(mz_streamp pStream, int level)
|
|
{
|
|
return mz_deflateInit2(pStream, level, MZ_DEFLATED, MZ_DEFAULT_WINDOW_BITS, 9, MZ_DEFAULT_STRATEGY);
|
|
}
|
|
|
|
int mz_deflateInit2(mz_streamp pStream, int level, int method, int window_bits, int mem_level, int strategy)
|
|
{
|
|
tdefl_compressor *pComp;
|
|
mz_uint comp_flags = TDEFL_COMPUTE_ADLER32 | tdefl_create_comp_flags_from_zip_params(level, window_bits, strategy);
|
|
|
|
if (!pStream) return MZ_STREAM_ERROR;
|
|
if ((method != MZ_DEFLATED) || ((mem_level < 1) || (mem_level > 9)) || ((window_bits != MZ_DEFAULT_WINDOW_BITS) && (-window_bits != MZ_DEFAULT_WINDOW_BITS))) return MZ_PARAM_ERROR;
|
|
|
|
pStream->data_type = 0;
|
|
pStream->adler = MZ_ADLER32_INIT;
|
|
pStream->msg = NULL;
|
|
pStream->reserved = 0;
|
|
pStream->total_in = 0;
|
|
pStream->total_out = 0;
|
|
if (!pStream->zalloc) pStream->zalloc = def_alloc_func;
|
|
if (!pStream->zfree) pStream->zfree = def_free_func;
|
|
|
|
pComp = (tdefl_compressor *)pStream->zalloc(pStream->opaque, 1, sizeof(tdefl_compressor));
|
|
if (!pComp)
|
|
return MZ_MEM_ERROR;
|
|
|
|
pStream->state = (struct mz_internal_state *)pComp;
|
|
|
|
if (tdefl_init(pComp, NULL, NULL, comp_flags) != TDEFL_STATUS_OKAY)
|
|
{
|
|
mz_deflateEnd(pStream);
|
|
return MZ_PARAM_ERROR;
|
|
}
|
|
|
|
return MZ_OK;
|
|
}
|
|
|
|
int mz_deflateReset(mz_streamp pStream)
|
|
{
|
|
if ((!pStream) || (!pStream->state) || (!pStream->zalloc) || (!pStream->zfree)) return MZ_STREAM_ERROR;
|
|
pStream->total_in = pStream->total_out = 0;
|
|
tdefl_init((tdefl_compressor*)pStream->state, NULL, NULL, ((tdefl_compressor*)pStream->state)->m_flags);
|
|
return MZ_OK;
|
|
}
|
|
|
|
int mz_deflate(mz_streamp pStream, int flush)
|
|
{
|
|
size_t in_bytes, out_bytes;
|
|
mz_ulong orig_total_in, orig_total_out;
|
|
int mz_status = MZ_OK;
|
|
|
|
if ((!pStream) || (!pStream->state) || (flush < 0) || (flush > MZ_FINISH) || (!pStream->next_out)) return MZ_STREAM_ERROR;
|
|
if (!pStream->avail_out) return MZ_BUF_ERROR;
|
|
|
|
if (flush == MZ_PARTIAL_FLUSH) flush = MZ_SYNC_FLUSH;
|
|
|
|
if (((tdefl_compressor*)pStream->state)->m_prev_return_status == TDEFL_STATUS_DONE)
|
|
return (flush == MZ_FINISH) ? MZ_STREAM_END : MZ_BUF_ERROR;
|
|
|
|
orig_total_in = pStream->total_in; orig_total_out = pStream->total_out;
|
|
for ( ; ; )
|
|
{
|
|
tdefl_status defl_status;
|
|
in_bytes = pStream->avail_in; out_bytes = pStream->avail_out;
|
|
|
|
defl_status = tdefl_compress((tdefl_compressor*)pStream->state, pStream->next_in, &in_bytes, pStream->next_out, &out_bytes, (tdefl_flush)flush);
|
|
pStream->next_in += (mz_uint)in_bytes; pStream->avail_in -= (mz_uint)in_bytes;
|
|
pStream->total_in += (mz_uint)in_bytes; pStream->adler = tdefl_get_adler32((tdefl_compressor*)pStream->state);
|
|
|
|
pStream->next_out += (mz_uint)out_bytes; pStream->avail_out -= (mz_uint)out_bytes;
|
|
pStream->total_out += (mz_uint)out_bytes;
|
|
|
|
if (defl_status < 0)
|
|
{
|
|
mz_status = MZ_STREAM_ERROR;
|
|
break;
|
|
}
|
|
else if (defl_status == TDEFL_STATUS_DONE)
|
|
{
|
|
mz_status = MZ_STREAM_END;
|
|
break;
|
|
}
|
|
else if (!pStream->avail_out)
|
|
break;
|
|
else if ((!pStream->avail_in) && (flush != MZ_FINISH))
|
|
{
|
|
if ((flush) || (pStream->total_in != orig_total_in) || (pStream->total_out != orig_total_out))
|
|
break;
|
|
return MZ_BUF_ERROR; // Can't make forward progress without some input.
|
|
}
|
|
}
|
|
return mz_status;
|
|
}
|
|
|
|
int mz_deflateEnd(mz_streamp pStream)
|
|
{
|
|
if (!pStream) return MZ_STREAM_ERROR;
|
|
if (pStream->state)
|
|
{
|
|
pStream->zfree(pStream->opaque, pStream->state);
|
|
pStream->state = NULL;
|
|
}
|
|
return MZ_OK;
|
|
}
|
|
|
|
mz_ulong mz_deflateBound(mz_streamp pStream, mz_ulong source_len)
|
|
{
|
|
pStream;
|
|
// This is really over conservative. (And lame, but it's actually pretty tricky to compute a true upper bound given the way tdefl's blocking works.)
|
|
return MZ_MAX(128 + (source_len * 110) / 100, 128 + source_len + ((source_len / (31 * 1024)) + 1) * 5);
|
|
}
|
|
|
|
int mz_compress2(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len, int level)
|
|
{
|
|
int status;
|
|
mz_stream stream;
|
|
memset(&stream, 0, sizeof(stream));
|
|
|
|
// In case mz_ulong is 64-bits (argh I hate longs).
|
|
if ((source_len | *pDest_len) > 0xFFFFFFFFU) return MZ_PARAM_ERROR;
|
|
|
|
stream.next_in = pSource;
|
|
stream.avail_in = (mz_uint32)source_len;
|
|
stream.next_out = pDest;
|
|
stream.avail_out = (mz_uint32)*pDest_len;
|
|
|
|
status = mz_deflateInit(&stream, level);
|
|
if (status != MZ_OK) return status;
|
|
|
|
status = mz_deflate(&stream, MZ_FINISH);
|
|
if (status != MZ_STREAM_END)
|
|
{
|
|
mz_deflateEnd(&stream);
|
|
return (status == MZ_OK) ? MZ_BUF_ERROR : status;
|
|
}
|
|
|
|
*pDest_len = stream.total_out;
|
|
return mz_deflateEnd(&stream);
|
|
}
|
|
|
|
int mz_compress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len)
|
|
{
|
|
return mz_compress2(pDest, pDest_len, pSource, source_len, MZ_DEFAULT_COMPRESSION);
|
|
}
|
|
|
|
mz_ulong mz_compressBound(mz_ulong source_len)
|
|
{
|
|
return mz_deflateBound(NULL, source_len);
|
|
}
|
|
|
|
typedef struct
|
|
{
|
|
tinfl_decompressor m_decomp;
|
|
mz_uint m_dict_ofs, m_dict_avail, m_first_call, m_has_flushed; int m_window_bits;
|
|
mz_uint8 m_dict[TINFL_LZ_DICT_SIZE];
|
|
tinfl_status m_last_status;
|
|
} inflate_state;
|
|
|
|
int mz_inflateInit2(mz_streamp pStream, int window_bits)
|
|
{
|
|
inflate_state *pDecomp;
|
|
if (!pStream) return MZ_STREAM_ERROR;
|
|
if ((window_bits != MZ_DEFAULT_WINDOW_BITS) && (-window_bits != MZ_DEFAULT_WINDOW_BITS)) return MZ_PARAM_ERROR;
|
|
|
|
pStream->data_type = 0;
|
|
pStream->adler = 0;
|
|
pStream->msg = NULL;
|
|
pStream->total_in = 0;
|
|
pStream->total_out = 0;
|
|
pStream->reserved = 0;
|
|
if (!pStream->zalloc) pStream->zalloc = def_alloc_func;
|
|
if (!pStream->zfree) pStream->zfree = def_free_func;
|
|
|
|
pDecomp = (inflate_state*)pStream->zalloc(pStream->opaque, 1, sizeof(inflate_state));
|
|
if (!pDecomp) return MZ_MEM_ERROR;
|
|
|
|
pStream->state = (struct mz_internal_state *)pDecomp;
|
|
|
|
tinfl_init(&pDecomp->m_decomp);
|
|
pDecomp->m_dict_ofs = 0;
|
|
pDecomp->m_dict_avail = 0;
|
|
pDecomp->m_last_status = TINFL_STATUS_NEEDS_MORE_INPUT;
|
|
pDecomp->m_first_call = 1;
|
|
pDecomp->m_has_flushed = 0;
|
|
pDecomp->m_window_bits = window_bits;
|
|
|
|
return MZ_OK;
|
|
}
|
|
|
|
int mz_inflateInit(mz_streamp pStream)
|
|
{
|
|
return mz_inflateInit2(pStream, MZ_DEFAULT_WINDOW_BITS);
|
|
}
|
|
|
|
int mz_inflate(mz_streamp pStream, int flush)
|
|
{
|
|
inflate_state* pState;
|
|
mz_uint n, first_call, decomp_flags = TINFL_FLAG_COMPUTE_ADLER32;
|
|
size_t in_bytes, out_bytes, orig_avail_in;
|
|
tinfl_status status;
|
|
|
|
if ((!pStream) || (!pStream->state)) return MZ_STREAM_ERROR;
|
|
if (flush == MZ_PARTIAL_FLUSH) flush = MZ_SYNC_FLUSH;
|
|
if ((flush) && (flush != MZ_SYNC_FLUSH) && (flush != MZ_FINISH)) return MZ_STREAM_ERROR;
|
|
|
|
pState = (inflate_state*)pStream->state;
|
|
if (pState->m_window_bits > 0) decomp_flags |= TINFL_FLAG_PARSE_ZLIB_HEADER;
|
|
orig_avail_in = pStream->avail_in;
|
|
|
|
first_call = pState->m_first_call; pState->m_first_call = 0;
|
|
if (pState->m_last_status < 0) return MZ_DATA_ERROR;
|
|
|
|
if (pState->m_has_flushed && (flush != MZ_FINISH)) return MZ_STREAM_ERROR;
|
|
pState->m_has_flushed |= (flush == MZ_FINISH);
|
|
|
|
if ((flush == MZ_FINISH) && (first_call))
|
|
{
|
|
// MZ_FINISH on the first call implies that the input and output buffers are large enough to hold the entire compressed/decompressed file.
|
|
decomp_flags |= TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF;
|
|
in_bytes = pStream->avail_in; out_bytes = pStream->avail_out;
|
|
status = tinfl_decompress(&pState->m_decomp, pStream->next_in, &in_bytes, pStream->next_out, pStream->next_out, &out_bytes, decomp_flags);
|
|
pState->m_last_status = status;
|
|
pStream->next_in += (mz_uint)in_bytes; pStream->avail_in -= (mz_uint)in_bytes; pStream->total_in += (mz_uint)in_bytes;
|
|
pStream->adler = tinfl_get_adler32(&pState->m_decomp);
|
|
pStream->next_out += (mz_uint)out_bytes; pStream->avail_out -= (mz_uint)out_bytes; pStream->total_out += (mz_uint)out_bytes;
|
|
|
|
if (status < 0)
|
|
return MZ_DATA_ERROR;
|
|
else if (status != TINFL_STATUS_DONE)
|
|
{
|
|
pState->m_last_status = TINFL_STATUS_FAILED;
|
|
return MZ_BUF_ERROR;
|
|
}
|
|
return MZ_STREAM_END;
|
|
}
|
|
// flush != MZ_FINISH then we must assume there's more input.
|
|
if (flush != MZ_FINISH) decomp_flags |= TINFL_FLAG_HAS_MORE_INPUT;
|
|
|
|
if (pState->m_dict_avail)
|
|
{
|
|
n = MZ_MIN(pState->m_dict_avail, pStream->avail_out);
|
|
memcpy(pStream->next_out, pState->m_dict + pState->m_dict_ofs, n);
|
|
pStream->next_out += n; pStream->avail_out -= n; pStream->total_out += n;
|
|
pState->m_dict_avail -= n; pState->m_dict_ofs = (pState->m_dict_ofs + n) & (TINFL_LZ_DICT_SIZE - 1);
|
|
return ((pState->m_last_status == TINFL_STATUS_DONE) && (!pState->m_dict_avail)) ? MZ_STREAM_END : MZ_OK;
|
|
}
|
|
|
|
for ( ; ; )
|
|
{
|
|
in_bytes = pStream->avail_in;
|
|
out_bytes = TINFL_LZ_DICT_SIZE - pState->m_dict_ofs;
|
|
|
|
status = tinfl_decompress(&pState->m_decomp, pStream->next_in, &in_bytes, pState->m_dict, pState->m_dict + pState->m_dict_ofs, &out_bytes, decomp_flags);
|
|
pState->m_last_status = status;
|
|
|
|
pStream->next_in += (mz_uint)in_bytes; pStream->avail_in -= (mz_uint)in_bytes;
|
|
pStream->total_in += (mz_uint)in_bytes; pStream->adler = tinfl_get_adler32(&pState->m_decomp);
|
|
|
|
pState->m_dict_avail = (mz_uint)out_bytes;
|
|
|
|
n = MZ_MIN(pState->m_dict_avail, pStream->avail_out);
|
|
memcpy(pStream->next_out, pState->m_dict + pState->m_dict_ofs, n);
|
|
pStream->next_out += n; pStream->avail_out -= n; pStream->total_out += n;
|
|
pState->m_dict_avail -= n; pState->m_dict_ofs = (pState->m_dict_ofs + n) & (TINFL_LZ_DICT_SIZE - 1);
|
|
|
|
if (status < 0)
|
|
return MZ_DATA_ERROR; // Stream is corrupted (there could be some uncompressed data left in the output dictionary - oh well).
|
|
else if ((status == TINFL_STATUS_NEEDS_MORE_INPUT) && (!orig_avail_in))
|
|
return MZ_BUF_ERROR; // Signal caller that we can't make forward progress without supplying more input or by setting flush to MZ_FINISH.
|
|
else if (flush == MZ_FINISH)
|
|
{
|
|
// The output buffer MUST be large to hold the remaining uncompressed data when flush==MZ_FINISH.
|
|
if (status == TINFL_STATUS_DONE)
|
|
return pState->m_dict_avail ? MZ_BUF_ERROR : MZ_STREAM_END;
|
|
// status here must be TINFL_STATUS_HAS_MORE_OUTPUT, which means there's at least 1 more byte on the way. If there's no more room left in the output buffer then something is wrong.
|
|
else if (!pStream->avail_out)
|
|
return MZ_BUF_ERROR;
|
|
}
|
|
else if ((status == TINFL_STATUS_DONE) || (!pStream->avail_in) || (!pStream->avail_out) || (pState->m_dict_avail))
|
|
break;
|
|
}
|
|
|
|
return ((status == TINFL_STATUS_DONE) && (!pState->m_dict_avail)) ? MZ_STREAM_END : MZ_OK;
|
|
}
|
|
|
|
int mz_inflateEnd(mz_streamp pStream)
|
|
{
|
|
if (!pStream)
|
|
return MZ_STREAM_ERROR;
|
|
if (pStream->state)
|
|
{
|
|
pStream->zfree(pStream->opaque, pStream->state);
|
|
pStream->state = NULL;
|
|
}
|
|
return MZ_OK;
|
|
}
|
|
|
|
int mz_uncompress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len)
|
|
{
|
|
mz_stream stream;
|
|
int status;
|
|
memset(&stream, 0, sizeof(stream));
|
|
|
|
// In case mz_ulong is 64-bits (argh I hate longs).
|
|
if ((source_len | *pDest_len) > 0xFFFFFFFFU) return MZ_PARAM_ERROR;
|
|
|
|
stream.next_in = pSource;
|
|
stream.avail_in = (mz_uint32)source_len;
|
|
stream.next_out = pDest;
|
|
stream.avail_out = (mz_uint32)*pDest_len;
|
|
|
|
status = mz_inflateInit(&stream);
|
|
if (status != MZ_OK)
|
|
return status;
|
|
|
|
status = mz_inflate(&stream, MZ_FINISH);
|
|
if (status != MZ_STREAM_END)
|
|
{
|
|
mz_inflateEnd(&stream);
|
|
return ((status == MZ_BUF_ERROR) && (!stream.avail_in)) ? MZ_DATA_ERROR : status;
|
|
}
|
|
*pDest_len = stream.total_out;
|
|
|
|
return mz_inflateEnd(&stream);
|
|
}
|
|
|
|
const char *mz_error(int err)
|
|
{
|
|
static struct { int m_err; const char *m_pDesc; } s_error_descs[] =
|
|
{
|
|
{ MZ_OK, "" }, { MZ_STREAM_END, "stream end" }, { MZ_NEED_DICT, "need dictionary" }, { MZ_ERRNO, "file error" }, { MZ_STREAM_ERROR, "stream error" },
|
|
{ MZ_DATA_ERROR, "data error" }, { MZ_MEM_ERROR, "out of memory" }, { MZ_BUF_ERROR, "buf error" }, { MZ_VERSION_ERROR, "version error" }, { MZ_PARAM_ERROR, "parameter error" }
|
|
};
|
|
mz_uint i; for (i = 0; i < sizeof(s_error_descs) / sizeof(s_error_descs[0]); ++i) if (s_error_descs[i].m_err == err) return s_error_descs[i].m_pDesc;
|
|
return NULL;
|
|
}
|
|
|
|
#endif //MINIZ_NO_ZLIB_APIS
|
|
|
|
// ------------------- Low-level Decompression (completely independent from all compression API's)
|
|
|
|
#define TINFL_MEMCPY(d, s, l) memcpy(d, s, l)
|
|
#define TINFL_MEMSET(p, c, l) memset(p, c, l)
|
|
|
|
#define TINFL_CR_BEGIN switch(r->m_state) { case 0:
|
|
#define TINFL_CR_RETURN(state_index, result) do { status = result; r->m_state = state_index; goto common_exit; case state_index:; } MZ_MACRO_END
|
|
#define TINFL_CR_RETURN_FOREVER(state_index, result) do { for ( ; ; ) { TINFL_CR_RETURN(state_index, result); } } MZ_MACRO_END
|
|
#define TINFL_CR_FINISH }
|
|
|
|
// TODO: If the caller has indicated that there's no more input, and we attempt to read beyond the input buf, then something is wrong with the input because the inflator never
|
|
// reads ahead more than it needs to. Currently TINFL_GET_BYTE() pads the end of the stream with 0's in this scenario.
|
|
#define TINFL_GET_BYTE(state_index, c) do { \
|
|
if (pIn_buf_cur >= pIn_buf_end) { \
|
|
for ( ; ; ) { \
|
|
if (decomp_flags & TINFL_FLAG_HAS_MORE_INPUT) { \
|
|
TINFL_CR_RETURN(state_index, TINFL_STATUS_NEEDS_MORE_INPUT); \
|
|
if (pIn_buf_cur < pIn_buf_end) { \
|
|
c = *pIn_buf_cur++; \
|
|
break; \
|
|
} \
|
|
} else { \
|
|
c = 0; \
|
|
break; \
|
|
} \
|
|
} \
|
|
} else c = *pIn_buf_cur++; } MZ_MACRO_END
|
|
|
|
#define TINFL_NEED_BITS(state_index, n) do { mz_uint c; TINFL_GET_BYTE(state_index, c); bit_buf |= (((tinfl_bit_buf_t)c) << num_bits); num_bits += 8; } while (num_bits < (mz_uint)(n))
|
|
#define TINFL_SKIP_BITS(state_index, n) do { if (num_bits < (mz_uint)(n)) { TINFL_NEED_BITS(state_index, n); } bit_buf >>= (n); num_bits -= (n); } MZ_MACRO_END
|
|
#define TINFL_GET_BITS(state_index, b, n) do { if (num_bits < (mz_uint)(n)) { TINFL_NEED_BITS(state_index, n); } b = bit_buf & ((1 << (n)) - 1); bit_buf >>= (n); num_bits -= (n); } MZ_MACRO_END
|
|
|
|
// TINFL_HUFF_BITBUF_FILL() is only used rarely, when the number of bytes remaining in the input buffer falls below 2.
|
|
// It reads just enough bytes from the input stream that are needed to decode the next Huffman code (and absolutely no more). It works by trying to fully decode a
|
|
// Huffman code by using whatever bits are currently present in the bit buffer. If this fails, it reads another byte, and tries again until it succeeds or until the
|
|
// bit buffer contains >=15 bits (deflate's max. Huffman code size).
|
|
#define TINFL_HUFF_BITBUF_FILL(state_index, pHuff) \
|
|
do { \
|
|
temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]; \
|
|
if (temp >= 0) { \
|
|
code_len = temp >> 9; \
|
|
if ((code_len) && (num_bits >= code_len)) \
|
|
break; \
|
|
} else if (num_bits > TINFL_FAST_LOOKUP_BITS) { \
|
|
code_len = TINFL_FAST_LOOKUP_BITS; \
|
|
do { \
|
|
temp = (pHuff)->m_tree[~temp + ((bit_buf >> code_len++) & 1)]; \
|
|
} while ((temp < 0) && (num_bits >= (code_len + 1))); if (temp >= 0) break; \
|
|
} TINFL_GET_BYTE(state_index, c); bit_buf |= (((tinfl_bit_buf_t)c) << num_bits); num_bits += 8; \
|
|
} while (num_bits < 15);
|
|
|
|
// TINFL_HUFF_DECODE() decodes the next Huffman coded symbol. It's more complex than you would initially expect because the zlib API expects the decompressor to never read
|
|
// beyond the final byte of the deflate stream. (In other words, when this macro wants to read another byte from the input, it REALLY needs another byte in order to fully
|
|
// decode the next Huffman code.) Handling this properly is particularly important on raw deflate (non-zlib) streams, which aren't followed by a byte aligned adler-32.
|
|
// The slow path is only executed at the very end of the input buffer.
|
|
#define TINFL_HUFF_DECODE(state_index, sym, pHuff) do { \
|
|
int temp; mz_uint code_len, c; \
|
|
if (num_bits < 15) { \
|
|
if ((pIn_buf_end - pIn_buf_cur) < 2) { \
|
|
TINFL_HUFF_BITBUF_FILL(state_index, pHuff); \
|
|
} else { \
|
|
bit_buf |= (((tinfl_bit_buf_t)pIn_buf_cur[0]) << num_bits) | (((tinfl_bit_buf_t)pIn_buf_cur[1]) << (num_bits + 8)); pIn_buf_cur += 2; num_bits += 16; \
|
|
} \
|
|
} \
|
|
if ((temp = (pHuff)->m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0) \
|
|
code_len = temp >> 9, temp &= 511; \
|
|
else { \
|
|
code_len = TINFL_FAST_LOOKUP_BITS; do { temp = (pHuff)->m_tree[~temp + ((bit_buf >> code_len++) & 1)]; } while (temp < 0); \
|
|
} sym = temp; bit_buf >>= code_len; num_bits -= code_len; } MZ_MACRO_END
|
|
|
|
tinfl_status tinfl_decompress(tinfl_decompressor *r, const mz_uint8 *pIn_buf_next, size_t *pIn_buf_size, mz_uint8 *pOut_buf_start, mz_uint8 *pOut_buf_next, size_t *pOut_buf_size, const mz_uint32 decomp_flags)
|
|
{
|
|
static const int s_length_base[31] = { 3,4,5,6,7,8,9,10,11,13, 15,17,19,23,27,31,35,43,51,59, 67,83,99,115,131,163,195,227,258,0,0 };
|
|
static const int s_length_extra[31]= { 0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,2,3,3,3,3,4,4,4,4,5,5,5,5,0,0,0 };
|
|
static const int s_dist_base[32] = { 1,2,3,4,5,7,9,13,17,25,33,49,65,97,129,193, 257,385,513,769,1025,1537,2049,3073,4097,6145,8193,12289,16385,24577,0,0};
|
|
static const int s_dist_extra[32] = { 0,0,0,0,1,1,2,2,3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,11,11,12,12,13,13};
|
|
static const mz_uint8 s_length_dezigzag[19] = { 16,17,18,0,8,7,9,6,10,5,11,4,12,3,13,2,14,1,15 };
|
|
static const int s_min_table_sizes[3] = { 257, 1, 4 };
|
|
|
|
tinfl_status status = TINFL_STATUS_FAILED; mz_uint32 num_bits, dist, counter, num_extra; tinfl_bit_buf_t bit_buf;
|
|
const mz_uint8 *pIn_buf_cur = pIn_buf_next, *const pIn_buf_end = pIn_buf_next + *pIn_buf_size;
|
|
mz_uint8 *pOut_buf_cur = pOut_buf_next, *const pOut_buf_end = pOut_buf_next + *pOut_buf_size;
|
|
size_t out_buf_size_mask = (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF) ? (size_t)-1 : ((pOut_buf_next - pOut_buf_start) + *pOut_buf_size) - 1, dist_from_out_buf_start;
|
|
|
|
// Ensure the output buffer's size is a power of 2, unless the output buffer is large enough to hold the entire output file (in which case it doesn't matter).
|
|
if (((out_buf_size_mask + 1) & out_buf_size_mask) || (pOut_buf_next < pOut_buf_start)) { *pIn_buf_size = *pOut_buf_size = 0; return TINFL_STATUS_BAD_PARAM; }
|
|
|
|
num_bits = r->m_num_bits; bit_buf = r->m_bit_buf; dist = r->m_dist; counter = r->m_counter; num_extra = r->m_num_extra; dist_from_out_buf_start = r->m_dist_from_out_buf_start;
|
|
TINFL_CR_BEGIN
|
|
|
|
bit_buf = num_bits = dist = counter = num_extra = r->m_zhdr0 = r->m_zhdr1 = 0; r->m_z_adler32 = r->m_check_adler32 = 1;
|
|
if (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER)
|
|
{
|
|
TINFL_GET_BYTE(1, r->m_zhdr0); TINFL_GET_BYTE(2, r->m_zhdr1);
|
|
counter = (((r->m_zhdr0 * 256 + r->m_zhdr1) % 31 != 0) || (r->m_zhdr1 & 32) || ((r->m_zhdr0 & 15) != 8));
|
|
if (!(decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)) counter |= (((1U << (8U + (r->m_zhdr0 >> 4))) > 32768U) || ((out_buf_size_mask + 1) < (size_t)(1U << (8U + (r->m_zhdr0 >> 4)))));
|
|
if (counter) { TINFL_CR_RETURN_FOREVER(36, TINFL_STATUS_FAILED); }
|
|
}
|
|
|
|
do
|
|
{
|
|
TINFL_GET_BITS(3, r->m_final, 3); r->m_type = r->m_final >> 1;
|
|
if (r->m_type == 0)
|
|
{
|
|
TINFL_SKIP_BITS(5, num_bits & 7);
|
|
for (counter = 0; counter < 4; ++counter) { if (num_bits) TINFL_GET_BITS(6, r->m_raw_header[counter], 8); else TINFL_GET_BYTE(7, r->m_raw_header[counter]); }
|
|
if ((counter = (r->m_raw_header[0] | (r->m_raw_header[1] << 8))) != (mz_uint)(0xFFFF ^ (r->m_raw_header[2] | (r->m_raw_header[3] << 8)))) { TINFL_CR_RETURN_FOREVER(39, TINFL_STATUS_FAILED); }
|
|
while ((counter) && (num_bits))
|
|
{
|
|
TINFL_GET_BITS(51, dist, 8);
|
|
while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(52, TINFL_STATUS_HAS_MORE_OUTPUT); }
|
|
*pOut_buf_cur++ = (mz_uint8)dist;
|
|
counter--;
|
|
}
|
|
while (counter)
|
|
{
|
|
size_t n; while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(9, TINFL_STATUS_HAS_MORE_OUTPUT); }
|
|
while (pIn_buf_cur >= pIn_buf_end)
|
|
{
|
|
if (decomp_flags & TINFL_FLAG_HAS_MORE_INPUT)
|
|
{
|
|
TINFL_CR_RETURN(38, TINFL_STATUS_NEEDS_MORE_INPUT);
|
|
}
|
|
else
|
|
{
|
|
TINFL_CR_RETURN_FOREVER(40, TINFL_STATUS_FAILED);
|
|
}
|
|
}
|
|
n = MZ_MIN(MZ_MIN((size_t)(pOut_buf_end - pOut_buf_cur), (size_t)(pIn_buf_end - pIn_buf_cur)), counter);
|
|
TINFL_MEMCPY(pOut_buf_cur, pIn_buf_cur, n); pIn_buf_cur += n; pOut_buf_cur += n; counter -= (mz_uint)n;
|
|
}
|
|
}
|
|
else if (r->m_type == 3)
|
|
{
|
|
TINFL_CR_RETURN_FOREVER(10, TINFL_STATUS_FAILED);
|
|
}
|
|
else
|
|
{
|
|
if (r->m_type == 1)
|
|
{
|
|
mz_uint8 *p = r->m_tables[0].m_code_size; mz_uint i;
|
|
r->m_table_sizes[0] = 288; r->m_table_sizes[1] = 32; TINFL_MEMSET(r->m_tables[1].m_code_size, 5, 32);
|
|
for ( i = 0; i <= 143; ++i) *p++ = 8; for ( ; i <= 255; ++i) *p++ = 9; for ( ; i <= 279; ++i) *p++ = 7; for ( ; i <= 287; ++i) *p++ = 8;
|
|
}
|
|
else
|
|
{
|
|
for (counter = 0; counter < 3; counter++) { TINFL_GET_BITS(11, r->m_table_sizes[counter], "\05\05\04"[counter]); r->m_table_sizes[counter] += s_min_table_sizes[counter]; }
|
|
MZ_CLEAR_OBJ(r->m_tables[2].m_code_size); for (counter = 0; counter < r->m_table_sizes[2]; counter++) { mz_uint s; TINFL_GET_BITS(14, s, 3); r->m_tables[2].m_code_size[s_length_dezigzag[counter]] = (mz_uint8)s; }
|
|
r->m_table_sizes[2] = 19;
|
|
}
|
|
for ( ; (int)r->m_type >= 0; r->m_type--)
|
|
{
|
|
int tree_next, tree_cur; tinfl_huff_table *pTable;
|
|
mz_uint i, j, used_syms, total, sym_index, next_code[17], total_syms[16]; pTable = &r->m_tables[r->m_type]; MZ_CLEAR_OBJ(total_syms); MZ_CLEAR_OBJ(pTable->m_look_up); MZ_CLEAR_OBJ(pTable->m_tree);
|
|
for (i = 0; i < r->m_table_sizes[r->m_type]; ++i) total_syms[pTable->m_code_size[i]]++;
|
|
used_syms = 0, total = 0; next_code[0] = next_code[1] = 0;
|
|
for (i = 1; i <= 15; ++i) { used_syms += total_syms[i]; next_code[i + 1] = (total = ((total + total_syms[i]) << 1)); }
|
|
if ((65536 != total) && (used_syms > 1))
|
|
{
|
|
TINFL_CR_RETURN_FOREVER(35, TINFL_STATUS_FAILED);
|
|
}
|
|
for (tree_next = -1, sym_index = 0; sym_index < r->m_table_sizes[r->m_type]; ++sym_index)
|
|
{
|
|
mz_uint rev_code = 0, l, cur_code, code_size = pTable->m_code_size[sym_index]; if (!code_size) continue;
|
|
cur_code = next_code[code_size]++; for (l = code_size; l > 0; l--, cur_code >>= 1) rev_code = (rev_code << 1) | (cur_code & 1);
|
|
if (code_size <= TINFL_FAST_LOOKUP_BITS) { mz_int16 k = (mz_int16)((code_size << 9) | sym_index); while (rev_code < TINFL_FAST_LOOKUP_SIZE) { pTable->m_look_up[rev_code] = k; rev_code += (1 << code_size); } continue; }
|
|
if (0 == (tree_cur = pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)])) { pTable->m_look_up[rev_code & (TINFL_FAST_LOOKUP_SIZE - 1)] = (mz_int16)tree_next; tree_cur = tree_next; tree_next -= 2; }
|
|
rev_code >>= (TINFL_FAST_LOOKUP_BITS - 1);
|
|
for (j = code_size; j > (TINFL_FAST_LOOKUP_BITS + 1); j--)
|
|
{
|
|
tree_cur -= ((rev_code >>= 1) & 1);
|
|
if (!pTable->m_tree[-tree_cur - 1]) { pTable->m_tree[-tree_cur - 1] = (mz_int16)tree_next; tree_cur = tree_next; tree_next -= 2; } else tree_cur = pTable->m_tree[-tree_cur - 1];
|
|
}
|
|
tree_cur -= ((rev_code >>= 1) & 1); pTable->m_tree[-tree_cur - 1] = (mz_int16)sym_index;
|
|
}
|
|
if (r->m_type == 2)
|
|
{
|
|
for (counter = 0; counter < (r->m_table_sizes[0] + r->m_table_sizes[1]); )
|
|
{
|
|
mz_uint s; TINFL_HUFF_DECODE(16, dist, &r->m_tables[2]); if (dist < 16) { r->m_len_codes[counter++] = (mz_uint8)dist; continue; }
|
|
if ((dist == 16) && (!counter))
|
|
{
|
|
TINFL_CR_RETURN_FOREVER(17, TINFL_STATUS_FAILED);
|
|
}
|
|
num_extra = "\02\03\07"[dist - 16]; TINFL_GET_BITS(18, s, num_extra); s += "\03\03\013"[dist - 16];
|
|
TINFL_MEMSET(r->m_len_codes + counter, (dist == 16) ? r->m_len_codes[counter - 1] : 0, s); counter += s;
|
|
}
|
|
if ((r->m_table_sizes[0] + r->m_table_sizes[1]) != counter)
|
|
{
|
|
TINFL_CR_RETURN_FOREVER(21, TINFL_STATUS_FAILED);
|
|
}
|
|
TINFL_MEMCPY(r->m_tables[0].m_code_size, r->m_len_codes, r->m_table_sizes[0]); TINFL_MEMCPY(r->m_tables[1].m_code_size, r->m_len_codes + r->m_table_sizes[0], r->m_table_sizes[1]);
|
|
}
|
|
}
|
|
for ( ; ; )
|
|
{
|
|
mz_uint8 *pSrc;
|
|
for ( ; ; )
|
|
{
|
|
if (((pIn_buf_end - pIn_buf_cur) < 4) || ((pOut_buf_end - pOut_buf_cur) < 2))
|
|
{
|
|
TINFL_HUFF_DECODE(23, counter, &r->m_tables[0]);
|
|
if (counter >= 256)
|
|
break;
|
|
while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(24, TINFL_STATUS_HAS_MORE_OUTPUT); }
|
|
*pOut_buf_cur++ = (mz_uint8)counter;
|
|
}
|
|
else
|
|
{
|
|
int sym2; mz_uint code_len;
|
|
#if TINFL_USE_64BIT_BITBUF
|
|
if (num_bits < 30) { bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE32(pIn_buf_cur)) << num_bits); pIn_buf_cur += 4; num_bits += 32; }
|
|
#else
|
|
if (num_bits < 15) { bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE16(pIn_buf_cur)) << num_bits); pIn_buf_cur += 2; num_bits += 16; }
|
|
#endif
|
|
if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)
|
|
code_len = sym2 >> 9;
|
|
else
|
|
{
|
|
code_len = TINFL_FAST_LOOKUP_BITS; do { sym2 = r->m_tables[0].m_tree[~sym2 + ((bit_buf >> code_len++) & 1)]; } while (sym2 < 0);
|
|
}
|
|
counter = sym2; bit_buf >>= code_len; num_bits -= code_len;
|
|
if (counter & 256)
|
|
break;
|
|
|
|
#if !TINFL_USE_64BIT_BITBUF
|
|
if (num_bits < 15) { bit_buf |= (((tinfl_bit_buf_t)MZ_READ_LE16(pIn_buf_cur)) << num_bits); pIn_buf_cur += 2; num_bits += 16; }
|
|
#endif
|
|
if ((sym2 = r->m_tables[0].m_look_up[bit_buf & (TINFL_FAST_LOOKUP_SIZE - 1)]) >= 0)
|
|
code_len = sym2 >> 9;
|
|
else
|
|
{
|
|
code_len = TINFL_FAST_LOOKUP_BITS; do { sym2 = r->m_tables[0].m_tree[~sym2 + ((bit_buf >> code_len++) & 1)]; } while (sym2 < 0);
|
|
}
|
|
bit_buf >>= code_len; num_bits -= code_len;
|
|
|
|
pOut_buf_cur[0] = (mz_uint8)counter;
|
|
if (sym2 & 256)
|
|
{
|
|
pOut_buf_cur++;
|
|
counter = sym2;
|
|
break;
|
|
}
|
|
pOut_buf_cur[1] = (mz_uint8)sym2;
|
|
pOut_buf_cur += 2;
|
|
}
|
|
}
|
|
if ((counter &= 511) == 256) break;
|
|
|
|
num_extra = s_length_extra[counter - 257]; counter = s_length_base[counter - 257];
|
|
if (num_extra) { mz_uint extra_bits; TINFL_GET_BITS(25, extra_bits, num_extra); counter += extra_bits; }
|
|
|
|
TINFL_HUFF_DECODE(26, dist, &r->m_tables[1]);
|
|
num_extra = s_dist_extra[dist]; dist = s_dist_base[dist];
|
|
if (num_extra) { mz_uint extra_bits; TINFL_GET_BITS(27, extra_bits, num_extra); dist += extra_bits; }
|
|
|
|
dist_from_out_buf_start = pOut_buf_cur - pOut_buf_start;
|
|
if ((dist > dist_from_out_buf_start) && (decomp_flags & TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF))
|
|
{
|
|
TINFL_CR_RETURN_FOREVER(37, TINFL_STATUS_FAILED);
|
|
}
|
|
|
|
pSrc = pOut_buf_start + ((dist_from_out_buf_start - dist) & out_buf_size_mask);
|
|
|
|
if ((MZ_MAX(pOut_buf_cur, pSrc) + counter) > pOut_buf_end)
|
|
{
|
|
while (counter--)
|
|
{
|
|
while (pOut_buf_cur >= pOut_buf_end) { TINFL_CR_RETURN(53, TINFL_STATUS_HAS_MORE_OUTPUT); }
|
|
*pOut_buf_cur++ = pOut_buf_start[(dist_from_out_buf_start++ - dist) & out_buf_size_mask];
|
|
}
|
|
continue;
|
|
}
|
|
#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES
|
|
else if ((counter >= 9) && (counter <= dist))
|
|
{
|
|
const mz_uint8 *pSrc_end = pSrc + (counter & ~7);
|
|
do
|
|
{
|
|
((mz_uint32 *)pOut_buf_cur)[0] = ((const mz_uint32 *)pSrc)[0];
|
|
((mz_uint32 *)pOut_buf_cur)[1] = ((const mz_uint32 *)pSrc)[1];
|
|
pOut_buf_cur += 8;
|
|
} while ((pSrc += 8) < pSrc_end);
|
|
if ((counter &= 7) < 3)
|
|
{
|
|
if (counter)
|
|
{
|
|
pOut_buf_cur[0] = pSrc[0];
|
|
if (counter > 1)
|
|
pOut_buf_cur[1] = pSrc[1];
|
|
pOut_buf_cur += counter;
|
|
}
|
|
continue;
|
|
}
|
|
}
|
|
#endif
|
|
do
|
|
{
|
|
pOut_buf_cur[0] = pSrc[0];
|
|
pOut_buf_cur[1] = pSrc[1];
|
|
pOut_buf_cur[2] = pSrc[2];
|
|
pOut_buf_cur += 3; pSrc += 3;
|
|
} while ((int)(counter -= 3) > 2);
|
|
if ((int)counter > 0)
|
|
{
|
|
pOut_buf_cur[0] = pSrc[0];
|
|
if ((int)counter > 1)
|
|
pOut_buf_cur[1] = pSrc[1];
|
|
pOut_buf_cur += counter;
|
|
}
|
|
}
|
|
}
|
|
} while (!(r->m_final & 1));
|
|
if (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER)
|
|
{
|
|
TINFL_SKIP_BITS(32, num_bits & 7); for (counter = 0; counter < 4; ++counter) { mz_uint s; if (num_bits) TINFL_GET_BITS(41, s, 8); else TINFL_GET_BYTE(42, s); r->m_z_adler32 = (r->m_z_adler32 << 8) | s; }
|
|
}
|
|
TINFL_CR_RETURN_FOREVER(34, TINFL_STATUS_DONE);
|
|
TINFL_CR_FINISH
|
|
|
|
common_exit:
|
|
r->m_num_bits = num_bits; r->m_bit_buf = bit_buf; r->m_dist = dist; r->m_counter = counter; r->m_num_extra = num_extra; r->m_dist_from_out_buf_start = dist_from_out_buf_start;
|
|
*pIn_buf_size = pIn_buf_cur - pIn_buf_next; *pOut_buf_size = pOut_buf_cur - pOut_buf_next;
|
|
if ((decomp_flags & (TINFL_FLAG_PARSE_ZLIB_HEADER | TINFL_FLAG_COMPUTE_ADLER32)) && (status >= 0))
|
|
{
|
|
const mz_uint8 *ptr = pOut_buf_next; size_t buf_len = *pOut_buf_size;
|
|
mz_uint32 i, s1 = r->m_check_adler32 & 0xffff, s2 = r->m_check_adler32 >> 16; size_t block_len = buf_len % 5552;
|
|
while (buf_len)
|
|
{
|
|
for (i = 0; i + 7 < block_len; i += 8, ptr += 8)
|
|
{
|
|
s1 += ptr[0], s2 += s1; s1 += ptr[1], s2 += s1; s1 += ptr[2], s2 += s1; s1 += ptr[3], s2 += s1;
|
|
s1 += ptr[4], s2 += s1; s1 += ptr[5], s2 += s1; s1 += ptr[6], s2 += s1; s1 += ptr[7], s2 += s1;
|
|
}
|
|
for ( ; i < block_len; ++i) s1 += *ptr++, s2 += s1;
|
|
s1 %= 65521U, s2 %= 65521U; buf_len -= block_len; block_len = 5552;
|
|
}
|
|
r->m_check_adler32 = (s2 << 16) + s1; if ((status == TINFL_STATUS_DONE) && (decomp_flags & TINFL_FLAG_PARSE_ZLIB_HEADER) && (r->m_check_adler32 != r->m_z_adler32)) status = TINFL_STATUS_ADLER32_MISMATCH;
|
|
}
|
|
return status;
|
|
}
|
|
|
|
// Higher level helper functions.
|
|
void *tinfl_decompress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags)
|
|
{
|
|
tinfl_decompressor decomp; void *pBuf = NULL, *pNew_buf; size_t src_buf_ofs = 0, out_buf_capacity = 0;
|
|
*pOut_len = 0;
|
|
tinfl_init(&decomp);
|
|
for ( ; ; )
|
|
{
|
|
size_t src_buf_size = src_buf_len - src_buf_ofs, dst_buf_size = out_buf_capacity - *pOut_len, new_out_buf_capacity;
|
|
tinfl_status status = tinfl_decompress(&decomp, (const mz_uint8*)pSrc_buf + src_buf_ofs, &src_buf_size, (mz_uint8*)pBuf, pBuf ? (mz_uint8*)pBuf + *pOut_len : NULL, &dst_buf_size,
|
|
(flags & ~TINFL_FLAG_HAS_MORE_INPUT) | TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF);
|
|
if ((status < 0) || (status == TINFL_STATUS_NEEDS_MORE_INPUT))
|
|
{
|
|
MZ_FREE(pBuf); *pOut_len = 0; return NULL;
|
|
}
|
|
src_buf_ofs += src_buf_size;
|
|
*pOut_len += dst_buf_size;
|
|
if (status == TINFL_STATUS_DONE) break;
|
|
new_out_buf_capacity = out_buf_capacity * 2; if (new_out_buf_capacity < 128) new_out_buf_capacity = 128;
|
|
pNew_buf = MZ_REALLOC(pBuf, new_out_buf_capacity);
|
|
if (!pNew_buf)
|
|
{
|
|
MZ_FREE(pBuf); *pOut_len = 0; return NULL;
|
|
}
|
|
pBuf = pNew_buf; out_buf_capacity = new_out_buf_capacity;
|
|
}
|
|
return pBuf;
|
|
}
|
|
|
|
size_t tinfl_decompress_mem_to_mem(void *pOut_buf, size_t out_buf_len, const void *pSrc_buf, size_t src_buf_len, int flags)
|
|
{
|
|
tinfl_decompressor decomp; tinfl_status status; tinfl_init(&decomp);
|
|
status = tinfl_decompress(&decomp, (const mz_uint8*)pSrc_buf, &src_buf_len, (mz_uint8*)pOut_buf, (mz_uint8*)pOut_buf, &out_buf_len, (flags & ~TINFL_FLAG_HAS_MORE_INPUT) | TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF);
|
|
return (status != TINFL_STATUS_DONE) ? TINFL_DECOMPRESS_MEM_TO_MEM_FAILED : out_buf_len;
|
|
}
|
|
|
|
int tinfl_decompress_mem_to_callback(const void *pIn_buf, size_t *pIn_buf_size, tinfl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags)
|
|
{
|
|
int result = 0;
|
|
tinfl_decompressor decomp;
|
|
mz_uint8 *pDict = (mz_uint8*)MZ_MALLOC(TINFL_LZ_DICT_SIZE); size_t in_buf_ofs = 0, dict_ofs = 0;
|
|
if (!pDict)
|
|
return TINFL_STATUS_FAILED;
|
|
tinfl_init(&decomp);
|
|
for ( ; ; )
|
|
{
|
|
size_t in_buf_size = *pIn_buf_size - in_buf_ofs, dst_buf_size = TINFL_LZ_DICT_SIZE - dict_ofs;
|
|
tinfl_status status = tinfl_decompress(&decomp, (const mz_uint8*)pIn_buf + in_buf_ofs, &in_buf_size, pDict, pDict + dict_ofs, &dst_buf_size,
|
|
(flags & ~(TINFL_FLAG_HAS_MORE_INPUT | TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF)));
|
|
in_buf_ofs += in_buf_size;
|
|
if ((dst_buf_size) && (!(*pPut_buf_func)(pDict + dict_ofs, (int)dst_buf_size, pPut_buf_user)))
|
|
break;
|
|
if (status != TINFL_STATUS_HAS_MORE_OUTPUT)
|
|
{
|
|
result = (status == TINFL_STATUS_DONE);
|
|
break;
|
|
}
|
|
dict_ofs = (dict_ofs + dst_buf_size) & (TINFL_LZ_DICT_SIZE - 1);
|
|
}
|
|
MZ_FREE(pDict);
|
|
*pIn_buf_size = in_buf_ofs;
|
|
return result;
|
|
}
|
|
|
|
// ------------------- Low-level Compression (independent from all decompression API's)
|
|
|
|
// Purposely making these tables static for faster init and thread safety.
|
|
static const mz_uint16 s_tdefl_len_sym[256] = {
|
|
257,258,259,260,261,262,263,264,265,265,266,266,267,267,268,268,269,269,269,269,270,270,270,270,271,271,271,271,272,272,272,272,
|
|
273,273,273,273,273,273,273,273,274,274,274,274,274,274,274,274,275,275,275,275,275,275,275,275,276,276,276,276,276,276,276,276,
|
|
277,277,277,277,277,277,277,277,277,277,277,277,277,277,277,277,278,278,278,278,278,278,278,278,278,278,278,278,278,278,278,278,
|
|
279,279,279,279,279,279,279,279,279,279,279,279,279,279,279,279,280,280,280,280,280,280,280,280,280,280,280,280,280,280,280,280,
|
|
281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,281,
|
|
282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,282,
|
|
283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,283,
|
|
284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,284,285 };
|
|
|
|
static const mz_uint8 s_tdefl_len_extra[256] = {
|
|
0,0,0,0,0,0,0,0,1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,
|
|
4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
|
|
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
|
|
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,0 };
|
|
|
|
static const mz_uint8 s_tdefl_small_dist_sym[512] = {
|
|
0,1,2,3,4,4,5,5,6,6,6,6,7,7,7,7,8,8,8,8,8,8,8,8,9,9,9,9,9,9,9,9,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,10,11,11,11,11,11,11,
|
|
11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,13,
|
|
13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,14,14,14,14,14,14,14,14,14,14,14,14,
|
|
14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,14,
|
|
14,14,14,14,14,14,14,14,14,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,
|
|
15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,15,16,16,16,16,16,16,16,16,16,16,16,16,16,
|
|
16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
|
|
16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,
|
|
16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,16,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
|
|
17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
|
|
17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,
|
|
17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17,17 };
|
|
|
|
static const mz_uint8 s_tdefl_small_dist_extra[512] = {
|
|
0,0,0,0,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,5,5,5,5,5,5,5,5,
|
|
5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
|
|
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
|
|
6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
|
|
7,7,7,7,7,7,7,7 };
|
|
|
|
static const mz_uint8 s_tdefl_large_dist_sym[128] = {
|
|
0,0,18,19,20,20,21,21,22,22,22,22,23,23,23,23,24,24,24,24,24,24,24,24,25,25,25,25,25,25,25,25,26,26,26,26,26,26,26,26,26,26,26,26,
|
|
26,26,26,26,27,27,27,27,27,27,27,27,27,27,27,27,27,27,27,27,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,28,
|
|
28,28,28,28,28,28,28,28,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29,29 };
|
|
|
|
static const mz_uint8 s_tdefl_large_dist_extra[128] = {
|
|
0,0,8,8,9,9,9,9,10,10,10,10,10,10,10,10,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,11,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,
|
|
12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,12,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,
|
|
13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13,13 };
|
|
|
|
// Radix sorts tdefl_sym_freq[] array by 16-bit key m_key. Returns ptr to sorted values.
|
|
typedef struct { mz_uint16 m_key, m_sym_index; } tdefl_sym_freq;
|
|
static tdefl_sym_freq* tdefl_radix_sort_syms(mz_uint num_syms, tdefl_sym_freq* pSyms0, tdefl_sym_freq* pSyms1)
|
|
{
|
|
mz_uint32 total_passes = 2, pass_shift, pass, i, hist[256 * 2]; tdefl_sym_freq* pCur_syms = pSyms0, *pNew_syms = pSyms1; MZ_CLEAR_OBJ(hist);
|
|
for (i = 0; i < num_syms; i++) { mz_uint freq = pSyms0[i].m_key; hist[freq & 0xFF]++; hist[256 + ((freq >> 8) & 0xFF)]++; }
|
|
while ((total_passes > 1) && (num_syms == hist[(total_passes - 1) * 256])) total_passes--;
|
|
for (pass_shift = 0, pass = 0; pass < total_passes; pass++, pass_shift += 8)
|
|
{
|
|
const mz_uint32* pHist = &hist[pass << 8];
|
|
mz_uint offsets[256], cur_ofs = 0;
|
|
for (i = 0; i < 256; i++) { offsets[i] = cur_ofs; cur_ofs += pHist[i]; }
|
|
for (i = 0; i < num_syms; i++) pNew_syms[offsets[(pCur_syms[i].m_key >> pass_shift) & 0xFF]++] = pCur_syms[i];
|
|
{ tdefl_sym_freq* t = pCur_syms; pCur_syms = pNew_syms; pNew_syms = t; }
|
|
}
|
|
return pCur_syms;
|
|
}
|
|
|
|
// tdefl_calculate_minimum_redundancy() originally written by: Alistair Moffat, alistair@cs.mu.oz.au, Jyrki Katajainen, jyrki@diku.dk, November 1996.
|
|
static void tdefl_calculate_minimum_redundancy(tdefl_sym_freq *A, int n)
|
|
{
|
|
int root, leaf, next, avbl, used, dpth;
|
|
if (n==0) return; else if (n==1) { A[0].m_key = 1; return; }
|
|
A[0].m_key += A[1].m_key; root = 0; leaf = 2;
|
|
for (next=1; next < n-1; next++)
|
|
{
|
|
if (leaf>=n || A[root].m_key<A[leaf].m_key) { A[next].m_key = A[root].m_key; A[root++].m_key = (mz_uint16)next; } else A[next].m_key = A[leaf++].m_key;
|
|
if (leaf>=n || (root<next && A[root].m_key<A[leaf].m_key)) { A[next].m_key = (mz_uint16)(A[next].m_key + A[root].m_key); A[root++].m_key = (mz_uint16)next; } else A[next].m_key = (mz_uint16)(A[next].m_key + A[leaf++].m_key);
|
|
}
|
|
A[n-2].m_key = 0; for (next=n-3; next>=0; next--) A[next].m_key = A[A[next].m_key].m_key+1;
|
|
avbl = 1; used = dpth = 0; root = n-2; next = n-1;
|
|
while (avbl>0)
|
|
{
|
|
while (root>=0 && (int)A[root].m_key==dpth) { used++; root--; }
|
|
while (avbl>used) { A[next--].m_key = (mz_uint16)(dpth); avbl--; }
|
|
avbl = 2*used; dpth++; used = 0;
|
|
}
|
|
}
|
|
|
|
// Limits canonical Huffman code table's max code size.
|
|
enum { TDEFL_MAX_SUPPORTED_HUFF_CODESIZE = 32 };
|
|
static void tdefl_huffman_enforce_max_code_size(int *pNum_codes, int code_list_len, int max_code_size)
|
|
{
|
|
int i; mz_uint32 total = 0; if (code_list_len <= 1) return;
|
|
for (i = max_code_size + 1; i <= TDEFL_MAX_SUPPORTED_HUFF_CODESIZE; i++) pNum_codes[max_code_size] += pNum_codes[i];
|
|
for (i = max_code_size; i > 0; i--) total += (((mz_uint32)pNum_codes[i]) << (max_code_size - i));
|
|
while (total != (1UL << max_code_size))
|
|
{
|
|
pNum_codes[max_code_size]--;
|
|
for (i = max_code_size - 1; i > 0; i--) if (pNum_codes[i]) { pNum_codes[i]--; pNum_codes[i + 1] += 2; break; }
|
|
total--;
|
|
}
|
|
}
|
|
|
|
static void tdefl_optimize_huffman_table(tdefl_compressor *d, int table_num, int table_len, int code_size_limit, int static_table)
|
|
{
|
|
int i, j, l, num_codes[1 + TDEFL_MAX_SUPPORTED_HUFF_CODESIZE]; mz_uint next_code[TDEFL_MAX_SUPPORTED_HUFF_CODESIZE + 1]; MZ_CLEAR_OBJ(num_codes);
|
|
if (static_table)
|
|
{
|
|
for (i = 0; i < table_len; i++) num_codes[d->m_huff_code_sizes[table_num][i]]++;
|
|
}
|
|
else
|
|
{
|
|
tdefl_sym_freq syms0[TDEFL_MAX_HUFF_SYMBOLS], syms1[TDEFL_MAX_HUFF_SYMBOLS], *pSyms;
|
|
int num_used_syms = 0;
|
|
const mz_uint16 *pSym_count = &d->m_huff_count[table_num][0];
|
|
for (i = 0; i < table_len; i++) if (pSym_count[i]) { syms0[num_used_syms].m_key = (mz_uint16)pSym_count[i]; syms0[num_used_syms++].m_sym_index = (mz_uint16)i; }
|
|
|
|
pSyms = tdefl_radix_sort_syms(num_used_syms, syms0, syms1); tdefl_calculate_minimum_redundancy(pSyms, num_used_syms);
|
|
|
|
for (i = 0; i < num_used_syms; i++) num_codes[pSyms[i].m_key]++;
|
|
|
|
tdefl_huffman_enforce_max_code_size(num_codes, num_used_syms, code_size_limit);
|
|
|
|
MZ_CLEAR_OBJ(d->m_huff_code_sizes[table_num]); MZ_CLEAR_OBJ(d->m_huff_codes[table_num]);
|
|
for (i = 1, j = num_used_syms; i <= code_size_limit; i++)
|
|
for (l = num_codes[i]; l > 0; l--) d->m_huff_code_sizes[table_num][pSyms[--j].m_sym_index] = (mz_uint8)(i);
|
|
}
|
|
|
|
next_code[1] = 0; for (j = 0, i = 2; i <= code_size_limit; i++) next_code[i] = j = ((j + num_codes[i - 1]) << 1);
|
|
|
|
for (i = 0; i < table_len; i++)
|
|
{
|
|
mz_uint rev_code = 0, code, code_size; if ((code_size = d->m_huff_code_sizes[table_num][i]) == 0) continue;
|
|
code = next_code[code_size]++; for (l = code_size; l > 0; l--, code >>= 1) rev_code = (rev_code << 1) | (code & 1);
|
|
d->m_huff_codes[table_num][i] = (mz_uint16)rev_code;
|
|
}
|
|
}
|
|
|
|
#define TDEFL_PUT_BITS(b, l) do { \
|
|
mz_uint bits = b; mz_uint len = l; MZ_ASSERT(bits <= ((1U << len) - 1U)); \
|
|
d->m_bit_buffer |= (bits << d->m_bits_in); d->m_bits_in += len; \
|
|
while (d->m_bits_in >= 8) { \
|
|
if (d->m_pOutput_buf < d->m_pOutput_buf_end) \
|
|
*d->m_pOutput_buf++ = (mz_uint8)(d->m_bit_buffer); \
|
|
d->m_bit_buffer >>= 8; \
|
|
d->m_bits_in -= 8; \
|
|
} \
|
|
} MZ_MACRO_END
|
|
|
|
#define TDEFL_RLE_PREV_CODE_SIZE() { if (rle_repeat_count) { \
|
|
if (rle_repeat_count < 3) { \
|
|
d->m_huff_count[2][prev_code_size] = (mz_uint16)(d->m_huff_count[2][prev_code_size] + rle_repeat_count); \
|
|
while (rle_repeat_count--) packed_code_sizes[num_packed_code_sizes++] = prev_code_size; \
|
|
} else { \
|
|
d->m_huff_count[2][16] = (mz_uint16)(d->m_huff_count[2][16] + 1); packed_code_sizes[num_packed_code_sizes++] = 16; packed_code_sizes[num_packed_code_sizes++] = (mz_uint8)(rle_repeat_count - 3); \
|
|
} rle_repeat_count = 0; } }
|
|
|
|
#define TDEFL_RLE_ZERO_CODE_SIZE() { if (rle_z_count) { \
|
|
if (rle_z_count < 3) { \
|
|
d->m_huff_count[2][0] = (mz_uint16)(d->m_huff_count[2][0] + rle_z_count); while (rle_z_count--) packed_code_sizes[num_packed_code_sizes++] = 0; \
|
|
} else if (rle_z_count <= 10) { \
|
|
d->m_huff_count[2][17] = (mz_uint16)(d->m_huff_count[2][17] + 1); packed_code_sizes[num_packed_code_sizes++] = 17; packed_code_sizes[num_packed_code_sizes++] = (mz_uint8)(rle_z_count - 3); \
|
|
} else { \
|
|
d->m_huff_count[2][18] = (mz_uint16)(d->m_huff_count[2][18] + 1); packed_code_sizes[num_packed_code_sizes++] = 18; packed_code_sizes[num_packed_code_sizes++] = (mz_uint8)(rle_z_count - 11); \
|
|
} rle_z_count = 0; } }
|
|
|
|
static mz_uint8 s_tdefl_packed_code_size_syms_swizzle[] = { 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 };
|
|
|
|
static void tdefl_start_dynamic_block(tdefl_compressor *d)
|
|
{
|
|
int num_lit_codes, num_dist_codes, num_bit_lengths; mz_uint i, total_code_sizes_to_pack, num_packed_code_sizes, rle_z_count, rle_repeat_count, packed_code_sizes_index;
|
|
mz_uint8 code_sizes_to_pack[TDEFL_MAX_HUFF_SYMBOLS_0 + TDEFL_MAX_HUFF_SYMBOLS_1], packed_code_sizes[TDEFL_MAX_HUFF_SYMBOLS_0 + TDEFL_MAX_HUFF_SYMBOLS_1], prev_code_size = 0xFF;
|
|
|
|
d->m_huff_count[0][256] = 1;
|
|
|
|
tdefl_optimize_huffman_table(d, 0, TDEFL_MAX_HUFF_SYMBOLS_0, 15, MZ_FALSE);
|
|
tdefl_optimize_huffman_table(d, 1, TDEFL_MAX_HUFF_SYMBOLS_1, 15, MZ_FALSE);
|
|
|
|
for (num_lit_codes = 286; num_lit_codes > 257; num_lit_codes--) if (d->m_huff_code_sizes[0][num_lit_codes - 1]) break;
|
|
for (num_dist_codes = 30; num_dist_codes > 1; num_dist_codes--) if (d->m_huff_code_sizes[1][num_dist_codes - 1]) break;
|
|
|
|
memcpy(code_sizes_to_pack, &d->m_huff_code_sizes[0][0], num_lit_codes);
|
|
memcpy(code_sizes_to_pack + num_lit_codes, &d->m_huff_code_sizes[1][0], num_dist_codes);
|
|
total_code_sizes_to_pack = num_lit_codes + num_dist_codes; num_packed_code_sizes = 0; rle_z_count = 0; rle_repeat_count = 0;
|
|
|
|
memset(&d->m_huff_count[2][0], 0, sizeof(d->m_huff_count[2][0]) * TDEFL_MAX_HUFF_SYMBOLS_2);
|
|
for (i = 0; i < total_code_sizes_to_pack; i++)
|
|
{
|
|
mz_uint8 code_size = code_sizes_to_pack[i];
|
|
if (!code_size)
|
|
{
|
|
TDEFL_RLE_PREV_CODE_SIZE();
|
|
if (++rle_z_count == 138) { TDEFL_RLE_ZERO_CODE_SIZE(); }
|
|
}
|
|
else
|
|
{
|
|
TDEFL_RLE_ZERO_CODE_SIZE();
|
|
if (code_size != prev_code_size)
|
|
{
|
|
TDEFL_RLE_PREV_CODE_SIZE();
|
|
d->m_huff_count[2][code_size] = (mz_uint16)(d->m_huff_count[2][code_size] + 1); packed_code_sizes[num_packed_code_sizes++] = code_size;
|
|
}
|
|
else if (++rle_repeat_count == 6)
|
|
{
|
|
TDEFL_RLE_PREV_CODE_SIZE();
|
|
}
|
|
}
|
|
prev_code_size = code_size;
|
|
}
|
|
if (rle_repeat_count) { TDEFL_RLE_PREV_CODE_SIZE(); } else { TDEFL_RLE_ZERO_CODE_SIZE(); }
|
|
|
|
tdefl_optimize_huffman_table(d, 2, TDEFL_MAX_HUFF_SYMBOLS_2, 7, MZ_FALSE);
|
|
|
|
TDEFL_PUT_BITS(2, 2);
|
|
|
|
TDEFL_PUT_BITS(num_lit_codes - 257, 5);
|
|
TDEFL_PUT_BITS(num_dist_codes - 1, 5);
|
|
|
|
for (num_bit_lengths = 18; num_bit_lengths >= 0; num_bit_lengths--) if (d->m_huff_code_sizes[2][s_tdefl_packed_code_size_syms_swizzle[num_bit_lengths]]) break;
|
|
num_bit_lengths = MZ_MAX(4, (num_bit_lengths + 1)); TDEFL_PUT_BITS(num_bit_lengths - 4, 4);
|
|
for (i = 0; (int)i < num_bit_lengths; i++) TDEFL_PUT_BITS(d->m_huff_code_sizes[2][s_tdefl_packed_code_size_syms_swizzle[i]], 3);
|
|
|
|
for (packed_code_sizes_index = 0; packed_code_sizes_index < num_packed_code_sizes; )
|
|
{
|
|
mz_uint code = packed_code_sizes[packed_code_sizes_index++]; MZ_ASSERT(code < TDEFL_MAX_HUFF_SYMBOLS_2);
|
|
TDEFL_PUT_BITS(d->m_huff_codes[2][code], d->m_huff_code_sizes[2][code]);
|
|
if (code >= 16) TDEFL_PUT_BITS(packed_code_sizes[packed_code_sizes_index++], "\02\03\07"[code - 16]);
|
|
}
|
|
}
|
|
|
|
static void tdefl_start_static_block(tdefl_compressor *d)
|
|
{
|
|
mz_uint i;
|
|
mz_uint8 *p = &d->m_huff_code_sizes[0][0];
|
|
|
|
for (i = 0; i <= 143; ++i) *p++ = 8;
|
|
for ( ; i <= 255; ++i) *p++ = 9;
|
|
for ( ; i <= 279; ++i) *p++ = 7;
|
|
for ( ; i <= 287; ++i) *p++ = 8;
|
|
|
|
memset(d->m_huff_code_sizes[1], 5, 32);
|
|
|
|
tdefl_optimize_huffman_table(d, 0, 288, 15, MZ_TRUE);
|
|
tdefl_optimize_huffman_table(d, 1, 32, 15, MZ_TRUE);
|
|
|
|
TDEFL_PUT_BITS(1, 2);
|
|
}
|
|
|
|
static const mz_uint mz_bitmasks[17] = { 0x0000, 0x0001, 0x0003, 0x0007, 0x000F, 0x001F, 0x003F, 0x007F, 0x00FF, 0x01FF, 0x03FF, 0x07FF, 0x0FFF, 0x1FFF, 0x3FFF, 0x7FFF, 0xFFFF };
|
|
|
|
#if MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN && MINIZ_HAS_64BIT_REGISTERS
|
|
static mz_bool tdefl_compress_lz_codes(tdefl_compressor *d)
|
|
{
|
|
mz_uint flags;
|
|
mz_uint8 *pLZ_codes;
|
|
mz_uint8 *pOutput_buf = d->m_pOutput_buf;
|
|
mz_uint8 *pLZ_code_buf_end = d->m_pLZ_code_buf;
|
|
mz_uint64 bit_buffer = d->m_bit_buffer;
|
|
mz_uint bits_in = d->m_bits_in;
|
|
|
|
#define TDEFL_PUT_BITS_FAST(b, l) { bit_buffer |= (((mz_uint64)(b)) << bits_in); bits_in += (l); }
|
|
|
|
flags = 1;
|
|
for (pLZ_codes = d->m_lz_code_buf; pLZ_codes < pLZ_code_buf_end; flags >>= 1)
|
|
{
|
|
if (flags == 1)
|
|
flags = *pLZ_codes++ | 0x100;
|
|
|
|
if (flags & 1)
|
|
{
|
|
mz_uint s0, s1, n0, n1, sym, num_extra_bits;
|
|
mz_uint match_len = pLZ_codes[0], match_dist = *(const mz_uint16 *)(pLZ_codes + 1); pLZ_codes += 3;
|
|
|
|
MZ_ASSERT(d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]);
|
|
TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][s_tdefl_len_sym[match_len]], d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]);
|
|
TDEFL_PUT_BITS_FAST(match_len & mz_bitmasks[s_tdefl_len_extra[match_len]], s_tdefl_len_extra[match_len]);
|
|
|
|
// This sequence coaxes MSVC into using cmov's vs. jmp's.
|
|
s0 = s_tdefl_small_dist_sym[match_dist & 511];
|
|
n0 = s_tdefl_small_dist_extra[match_dist & 511];
|
|
s1 = s_tdefl_large_dist_sym[match_dist >> 8];
|
|
n1 = s_tdefl_large_dist_extra[match_dist >> 8];
|
|
sym = (match_dist < 512) ? s0 : s1;
|
|
num_extra_bits = (match_dist < 512) ? n0 : n1;
|
|
|
|
MZ_ASSERT(d->m_huff_code_sizes[1][sym]);
|
|
TDEFL_PUT_BITS_FAST(d->m_huff_codes[1][sym], d->m_huff_code_sizes[1][sym]);
|
|
TDEFL_PUT_BITS_FAST(match_dist & mz_bitmasks[num_extra_bits], num_extra_bits);
|
|
}
|
|
else
|
|
{
|
|
mz_uint lit = *pLZ_codes++;
|
|
MZ_ASSERT(d->m_huff_code_sizes[0][lit]);
|
|
TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]);
|
|
|
|
if (((flags & 2) == 0) && (pLZ_codes < pLZ_code_buf_end))
|
|
{
|
|
flags >>= 1;
|
|
lit = *pLZ_codes++;
|
|
MZ_ASSERT(d->m_huff_code_sizes[0][lit]);
|
|
TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]);
|
|
|
|
if (((flags & 2) == 0) && (pLZ_codes < pLZ_code_buf_end))
|
|
{
|
|
flags >>= 1;
|
|
lit = *pLZ_codes++;
|
|
MZ_ASSERT(d->m_huff_code_sizes[0][lit]);
|
|
TDEFL_PUT_BITS_FAST(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (pOutput_buf >= d->m_pOutput_buf_end)
|
|
return MZ_FALSE;
|
|
|
|
*(mz_uint64*)pOutput_buf = bit_buffer;
|
|
pOutput_buf += (bits_in >> 3);
|
|
bit_buffer >>= (bits_in & ~7);
|
|
bits_in &= 7;
|
|
}
|
|
|
|
#undef TDEFL_PUT_BITS_FAST
|
|
|
|
d->m_pOutput_buf = pOutput_buf;
|
|
d->m_bits_in = 0;
|
|
d->m_bit_buffer = 0;
|
|
|
|
while (bits_in)
|
|
{
|
|
mz_uint32 n = MZ_MIN(bits_in, 16);
|
|
TDEFL_PUT_BITS((mz_uint)bit_buffer & mz_bitmasks[n], n);
|
|
bit_buffer >>= n;
|
|
bits_in -= n;
|
|
}
|
|
|
|
TDEFL_PUT_BITS(d->m_huff_codes[0][256], d->m_huff_code_sizes[0][256]);
|
|
|
|
return (d->m_pOutput_buf < d->m_pOutput_buf_end);
|
|
}
|
|
#else
|
|
static mz_bool tdefl_compress_lz_codes(tdefl_compressor *d)
|
|
{
|
|
mz_uint flags;
|
|
mz_uint8 *pLZ_codes;
|
|
|
|
flags = 1;
|
|
for (pLZ_codes = d->m_lz_code_buf; pLZ_codes < d->m_pLZ_code_buf; flags >>= 1)
|
|
{
|
|
if (flags == 1)
|
|
flags = *pLZ_codes++ | 0x100;
|
|
if (flags & 1)
|
|
{
|
|
mz_uint sym, num_extra_bits;
|
|
mz_uint match_len = pLZ_codes[0], match_dist = (pLZ_codes[1] | (pLZ_codes[2] << 8)); pLZ_codes += 3;
|
|
|
|
MZ_ASSERT(d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]);
|
|
TDEFL_PUT_BITS(d->m_huff_codes[0][s_tdefl_len_sym[match_len]], d->m_huff_code_sizes[0][s_tdefl_len_sym[match_len]]);
|
|
TDEFL_PUT_BITS(match_len & mz_bitmasks[s_tdefl_len_extra[match_len]], s_tdefl_len_extra[match_len]);
|
|
|
|
if (match_dist < 512)
|
|
{
|
|
sym = s_tdefl_small_dist_sym[match_dist]; num_extra_bits = s_tdefl_small_dist_extra[match_dist];
|
|
}
|
|
else
|
|
{
|
|
sym = s_tdefl_large_dist_sym[match_dist >> 8]; num_extra_bits = s_tdefl_large_dist_extra[match_dist >> 8];
|
|
}
|
|
MZ_ASSERT(d->m_huff_code_sizes[1][sym]);
|
|
TDEFL_PUT_BITS(d->m_huff_codes[1][sym], d->m_huff_code_sizes[1][sym]);
|
|
TDEFL_PUT_BITS(match_dist & mz_bitmasks[num_extra_bits], num_extra_bits);
|
|
}
|
|
else
|
|
{
|
|
mz_uint lit = *pLZ_codes++;
|
|
MZ_ASSERT(d->m_huff_code_sizes[0][lit]);
|
|
TDEFL_PUT_BITS(d->m_huff_codes[0][lit], d->m_huff_code_sizes[0][lit]);
|
|
}
|
|
}
|
|
|
|
TDEFL_PUT_BITS(d->m_huff_codes[0][256], d->m_huff_code_sizes[0][256]);
|
|
|
|
return (d->m_pOutput_buf < d->m_pOutput_buf_end);
|
|
}
|
|
#endif // MINIZ_USE_UNALIGNED_LOADS_AND_STORES && MINIZ_LITTLE_ENDIAN && MINIZ_HAS_64BIT_REGISTERS
|
|
|
|
static mz_bool tdefl_compress_block(tdefl_compressor *d, mz_bool static_block)
|
|
{
|
|
if (static_block)
|
|
tdefl_start_static_block(d);
|
|
else
|
|
tdefl_start_dynamic_block(d);
|
|
return tdefl_compress_lz_codes(d);
|
|
}
|
|
|
|
static int tdefl_flush_block(tdefl_compressor *d, int flush)
|
|
{
|
|
mz_uint saved_bit_buf, saved_bits_in;
|
|
mz_uint8 *pSaved_output_buf;
|
|
mz_bool comp_block_succeeded = MZ_FALSE;
|
|
int n, use_raw_block = ((d->m_flags & TDEFL_FORCE_ALL_RAW_BLOCKS) != 0) && (d->m_lookahead_pos - d->m_lz_code_buf_dict_pos) <= d->m_dict_size;
|
|
mz_uint8 *pOutput_buf_start = ((d->m_pPut_buf_func == NULL) && ((*d->m_pOut_buf_size - d->m_out_buf_ofs) >= TDEFL_OUT_BUF_SIZE)) ? ((mz_uint8 *)d->m_pOut_buf + d->m_out_buf_ofs) : d->m_output_buf;
|
|
|
|
d->m_pOutput_buf = pOutput_buf_start;
|
|
d->m_pOutput_buf_end = d->m_pOutput_buf + TDEFL_OUT_BUF_SIZE - 16;
|
|
|
|
MZ_ASSERT(!d->m_output_flush_remaining);
|
|
d->m_output_flush_ofs = 0;
|
|
d->m_output_flush_remaining = 0;
|
|
|
|
*d->m_pLZ_flags = (mz_uint8)(*d->m_pLZ_flags >> d->m_num_flags_left);
|
|
d->m_pLZ_code_buf -= (d->m_num_flags_left == 8);
|
|
|
|
if ((d->m_flags & TDEFL_WRITE_ZLIB_HEADER) && (!d->m_block_index))
|
|
{
|
|
TDEFL_PUT_BITS(0x78, 8); TDEFL_PUT_BITS(0x01, 8);
|
|
}
|
|
|
|
TDEFL_PUT_BITS(flush == TDEFL_FINISH, 1);
|
|
|
|
pSaved_output_buf = d->m_pOutput_buf; saved_bit_buf = d->m_bit_buffer; saved_bits_in = d->m_bits_in;
|
|
|
|
if (!use_raw_block)
|
|
comp_block_succeeded = tdefl_compress_block(d, (d->m_flags & TDEFL_FORCE_ALL_STATIC_BLOCKS) || (d->m_total_lz_bytes < 48));
|
|
|
|
// If the block gets expanded, forget the current contents of the output buffer and send a raw block instead.
|
|
if ( ((use_raw_block) || ((d->m_total_lz_bytes) && ((d->m_pOutput_buf - pSaved_output_buf + 1U) >= d->m_total_lz_bytes))) &&
|
|
((d->m_lookahead_pos - d->m_lz_code_buf_dict_pos) <= d->m_dict_size) )
|
|
{
|
|
mz_uint i; d->m_pOutput_buf = pSaved_output_buf; d->m_bit_buffer = saved_bit_buf, d->m_bits_in = saved_bits_in;
|
|
TDEFL_PUT_BITS(0, 2);
|
|
if (d->m_bits_in) { TDEFL_PUT_BITS(0, 8 - d->m_bits_in); }
|
|
for (i = 2; i; --i, d->m_total_lz_bytes ^= 0xFFFF)
|
|
{
|
|
TDEFL_PUT_BITS(d->m_total_lz_bytes & 0xFFFF, 16);
|
|
}
|
|
for (i = 0; i < d->m_total_lz_bytes; ++i)
|
|
{
|
|
TDEFL_PUT_BITS(d->m_dict[(d->m_lz_code_buf_dict_pos + i) & TDEFL_LZ_DICT_SIZE_MASK], 8);
|
|
}
|
|
}
|
|
// Check for the extremely unlikely (if not impossible) case of the compressed block not fitting into the output buffer when using dynamic codes.
|
|
else if (!comp_block_succeeded)
|
|
{
|
|
d->m_pOutput_buf = pSaved_output_buf; d->m_bit_buffer = saved_bit_buf, d->m_bits_in = saved_bits_in;
|
|
tdefl_compress_block(d, MZ_TRUE);
|
|
}
|
|
|
|
if (flush)
|
|
{
|
|
if (flush == TDEFL_FINISH)
|
|
{
|
|
if (d->m_bits_in) { TDEFL_PUT_BITS(0, 8 - d->m_bits_in); }
|
|
if (d->m_flags & TDEFL_WRITE_ZLIB_HEADER) { mz_uint i, a = d->m_adler32; for (i = 0; i < 4; i++) { TDEFL_PUT_BITS((a >> 24) & 0xFF, 8); a <<= 8; } }
|
|
}
|
|
else
|
|
{
|
|
mz_uint i, z = 0; TDEFL_PUT_BITS(0, 3); if (d->m_bits_in) { TDEFL_PUT_BITS(0, 8 - d->m_bits_in); } for (i = 2; i; --i, z ^= 0xFFFF) { TDEFL_PUT_BITS(z & 0xFFFF, 16); }
|
|
}
|
|
}
|
|
|
|
MZ_ASSERT(d->m_pOutput_buf < d->m_pOutput_buf_end);
|
|
|
|
memset(&d->m_huff_count[0][0], 0, sizeof(d->m_huff_count[0][0]) * TDEFL_MAX_HUFF_SYMBOLS_0);
|
|
memset(&d->m_huff_count[1][0], 0, sizeof(d->m_huff_count[1][0]) * TDEFL_MAX_HUFF_SYMBOLS_1);
|
|
|
|
d->m_pLZ_code_buf = d->m_lz_code_buf + 1; d->m_pLZ_flags = d->m_lz_code_buf; d->m_num_flags_left = 8; d->m_lz_code_buf_dict_pos += d->m_total_lz_bytes; d->m_total_lz_bytes = 0; d->m_block_index++;
|
|
|
|
if ((n = (int)(d->m_pOutput_buf - pOutput_buf_start)) != 0)
|
|
{
|
|
if (d->m_pPut_buf_func)
|
|
{
|
|
|