1 /*
2  * SPDX-FileCopyrightText: 2021-2022 Espressif Systems (Shanghai) CO LTD
3  *
4  * SPDX-License-Identifier: Apache-2.0
5  */
6 #ifndef MINIZ_HEADER_INCLUDED
7 #define MINIZ_HEADER_INCLUDED
8 
9 #include <stdlib.h>
10 #include "esp_rom_caps.h"
11 
12 // Defines to completely disable specific portions of miniz.c:
13 // If all macros here are defined the only functionality remaining will be CRC-32, adler-32, tinfl, and tdefl.
14 
15 // Define MINIZ_NO_STDIO to disable all usage and any functions which rely on stdio for file I/O.
16 #define MINIZ_NO_STDIO
17 
18 // If MINIZ_NO_TIME is specified then the ZIP archive functions will not be able to get the current time, or
19 // get/set file times, and the C run-time funcs that get/set times won't be called.
20 // The current downside is the times written to your archives will be from 1979.
21 #define MINIZ_NO_TIME
22 
23 // Define MINIZ_NO_ARCHIVE_APIS to disable all ZIP archive API's.
24 #define MINIZ_NO_ARCHIVE_APIS
25 
26 // Define MINIZ_NO_ARCHIVE_APIS to disable all writing related ZIP archive API's.
27 #define MINIZ_NO_ARCHIVE_WRITING_APIS
28 
29 // Define MINIZ_NO_ZLIB_APIS to remove all ZLIB-style compression/decompression API's.
30 #define MINIZ_NO_ZLIB_APIS
31 
32 // Define MINIZ_NO_ZLIB_COMPATIBLE_NAME to disable zlib names, to prevent conflicts against stock zlib.
33 #define MINIZ_NO_ZLIB_COMPATIBLE_NAMES
34 
35 // Define MINIZ_NO_MALLOC to disable all calls to malloc, free, and realloc.
36 // Note if MINIZ_NO_MALLOC is defined then the user must always provide custom user alloc/free/realloc
37 // callbacks to the zlib and archive API's, and a few stand-alone helper API's which don't provide custom user
38 // functions (such as tdefl_compress_mem_to_heap() and tinfl_decompress_mem_to_heap()) won't work.
39 #define MINIZ_NO_MALLOC
40 
41 #if defined(__TINYC__) && (defined(__linux) || defined(__linux__))
42 // TODO: Work around "error: include file 'sys\utime.h' when compiling with tcc on Linux
43 #define MINIZ_NO_TIME
44 #endif
45 
46 #if !defined(MINIZ_NO_TIME) && !defined(MINIZ_NO_ARCHIVE_APIS)
47 #include <time.h>
48 #endif
49 
50 //Hardcoded options for Xtensa - JD
51 #define MINIZ_X86_OR_X64_CPU 0
52 #define MINIZ_LITTLE_ENDIAN 1
53 #define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 0
54 #define MINIZ_HAS_64BIT_REGISTERS 0
55 #define TINFL_USE_64BIT_BITBUF 0
56 
57 
58 #if defined(_M_IX86) || defined(_M_X64) || defined(__i386__) || defined(__i386) || defined(__i486__) || defined(__i486) || defined(i386) || defined(__ia64__) || defined(__x86_64__)
59 // MINIZ_X86_OR_X64_CPU is only used to help set the below macros.
60 #define MINIZ_X86_OR_X64_CPU 1
61 #endif
62 
63 #if (__BYTE_ORDER__==__ORDER_LITTLE_ENDIAN__) || MINIZ_X86_OR_X64_CPU
64 // Set MINIZ_LITTLE_ENDIAN to 1 if the processor is little endian.
65 #define MINIZ_LITTLE_ENDIAN 1
66 #endif
67 
68 #if MINIZ_X86_OR_X64_CPU
69 // Set MINIZ_USE_UNALIGNED_LOADS_AND_STORES to 1 on CPU's that permit efficient integer loads and stores from unaligned addresses.
70 #define MINIZ_USE_UNALIGNED_LOADS_AND_STORES 1
71 #endif
72 
73 #if defined(_M_X64) || defined(_WIN64) || defined(__MINGW64__) || defined(_LP64) || defined(__LP64__) || defined(__ia64__) || defined(__x86_64__)
74 // 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).
75 #define MINIZ_HAS_64BIT_REGISTERS 1
76 #endif
77 
78 #ifdef __cplusplus
79 extern "C" {
80 #endif
81 
82 // ------------------- zlib-style API Definitions.
83 
84 // For more compatibility with zlib, miniz.c uses unsigned long for some parameters/struct members. Beware: mz_ulong can be either 32 or 64-bits!
85 typedef unsigned long mz_ulong;
86 
87 // mz_free() internally uses the MZ_FREE() macro (which by default calls free() unless you've modified the MZ_MALLOC macro) to release a block allocated from the heap.
88 void mz_free(void *p);
89 
90 #define MZ_ADLER32_INIT (1)
91 // mz_adler32() returns the initial adler-32 value to use when called with ptr==NULL.
92 mz_ulong mz_adler32(mz_ulong adler, const unsigned char *ptr, size_t buf_len);
93 
94 #define MZ_CRC32_INIT (0)
95 
96 #if ESP_ROM_HAS_MZ_CRC32
97 // mz_crc32() returns the initial CRC-32 value to use when called with ptr==NULL.
98 mz_ulong mz_crc32(mz_ulong crc, const unsigned char *ptr, size_t buf_len);
99 #else
100 #include "esp_rom_crc.h"
101 #define mz_crc32 esp_rom_crc32_le
102 #endif //ESP_ROM_HAS_MZ_CRC32
103 
104 // Compression strategies.
105 enum { MZ_DEFAULT_STRATEGY = 0, MZ_FILTERED = 1, MZ_HUFFMAN_ONLY = 2, MZ_RLE = 3, MZ_FIXED = 4 };
106 
107 // Method
108 #define MZ_DEFLATED 8
109 
110 #ifndef MINIZ_NO_ZLIB_APIS
111 
112 // Heap allocation callbacks.
113 // Note that mz_alloc_func parameter types purpsosely differ from zlib's: items/size is size_t, not unsigned long.
114 typedef void *(*mz_alloc_func)(void *opaque, size_t items, size_t size);
115 typedef void (*mz_free_func)(void *opaque, void *address);
116 typedef void *(*mz_realloc_func)(void *opaque, void *address, size_t items, size_t size);
117 
118 #define MZ_VERSION          "9.1.15"
119 #define MZ_VERNUM           0x91F0
120 #define MZ_VER_MAJOR        9
121 #define MZ_VER_MINOR        1
122 #define MZ_VER_REVISION     15
123 #define MZ_VER_SUBREVISION  0
124 
125 // Flush values. For typical usage you only need MZ_NO_FLUSH and MZ_FINISH. The other values are for advanced use (refer to the zlib docs).
126 enum { MZ_NO_FLUSH = 0, MZ_PARTIAL_FLUSH = 1, MZ_SYNC_FLUSH = 2, MZ_FULL_FLUSH = 3, MZ_FINISH = 4, MZ_BLOCK = 5 };
127 
128 // Return status codes. MZ_PARAM_ERROR is non-standard.
129 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 };
130 
131 // Compression levels: 0-9 are the standard zlib-style levels, 10 is best possible compression (not zlib compatible, and may be very slow), MZ_DEFAULT_COMPRESSION=MZ_DEFAULT_LEVEL.
132 enum { MZ_NO_COMPRESSION = 0, MZ_BEST_SPEED = 1, MZ_BEST_COMPRESSION = 9, MZ_UBER_COMPRESSION = 10, MZ_DEFAULT_LEVEL = 6, MZ_DEFAULT_COMPRESSION = -1 };
133 
134 // Window bits
135 #define MZ_DEFAULT_WINDOW_BITS 15
136 
137 struct mz_internal_state;
138 
139 // Compression/decompression stream struct.
140 typedef struct mz_stream_s {
141     const unsigned char *next_in;     // pointer to next byte to read
142     unsigned int avail_in;            // number of bytes available at next_in
143     mz_ulong total_in;                // total number of bytes consumed so far
144 
145     unsigned char *next_out;          // pointer to next byte to write
146     unsigned int avail_out;           // number of bytes that can be written to next_out
147     mz_ulong total_out;               // total number of bytes produced so far
148 
149     char *msg;                        // error msg (unused)
150     struct mz_internal_state *state;  // internal state, allocated by zalloc/zfree
151 
152     mz_alloc_func zalloc;             // optional heap allocation function (defaults to malloc)
153     mz_free_func zfree;               // optional heap free function (defaults to free)
154     void *opaque;                     // heap alloc function user pointer
155 
156     int data_type;                    // data_type (unused)
157     mz_ulong adler;                   // adler32 of the source or uncompressed data
158     mz_ulong reserved;                // not used
159 } mz_stream;
160 
161 typedef mz_stream *mz_streamp;
162 
163 // Returns the version string of miniz.c.
164 const char *mz_version(void);
165 
166 // mz_deflateInit() initializes a compressor with default options:
167 // Parameters:
168 //  pStream must point to an initialized mz_stream struct.
169 //  level must be between [MZ_NO_COMPRESSION, MZ_BEST_COMPRESSION].
170 //  level 1 enables a specially optimized compression function that's been optimized purely for performance, not ratio.
171 //  (This special func. is currently only enabled when MINIZ_USE_UNALIGNED_LOADS_AND_STORES and MINIZ_LITTLE_ENDIAN are defined.)
172 // Return values:
173 //  MZ_OK on success.
174 //  MZ_STREAM_ERROR if the stream is bogus.
175 //  MZ_PARAM_ERROR if the input parameters are bogus.
176 //  MZ_MEM_ERROR on out of memory.
177 int mz_deflateInit(mz_streamp pStream, int level);
178 
179 // mz_deflateInit2() is like mz_deflate(), except with more control:
180 // Additional parameters:
181 //   method must be MZ_DEFLATED
182 //   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)
183 //   mem_level must be between [1, 9] (it's checked but ignored by miniz.c)
184 int mz_deflateInit2(mz_streamp pStream, int level, int method, int window_bits, int mem_level, int strategy);
185 
186 // Quickly resets a compressor without having to reallocate anything. Same as calling mz_deflateEnd() followed by mz_deflateInit()/mz_deflateInit2().
187 int mz_deflateReset(mz_streamp pStream);
188 
189 // mz_deflate() compresses the input to output, consuming as much of the input and producing as much output as possible.
190 // Parameters:
191 //   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.
192 //   flush may be MZ_NO_FLUSH, MZ_PARTIAL_FLUSH/MZ_SYNC_FLUSH, MZ_FULL_FLUSH, or MZ_FINISH.
193 // Return values:
194 //   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).
195 //   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.
196 //   MZ_STREAM_ERROR if the stream is bogus.
197 //   MZ_PARAM_ERROR if one of the parameters is invalid.
198 //   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.)
199 int mz_deflate(mz_streamp pStream, int flush);
200 
201 // mz_deflateEnd() deinitializes a compressor:
202 // Return values:
203 //  MZ_OK on success.
204 //  MZ_STREAM_ERROR if the stream is bogus.
205 int mz_deflateEnd(mz_streamp pStream);
206 
207 // 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.
208 mz_ulong mz_deflateBound(mz_streamp pStream, mz_ulong source_len);
209 
210 // Single-call compression functions mz_compress() and mz_compress2():
211 // Returns MZ_OK on success, or one of the error codes from mz_deflate() on failure.
212 int mz_compress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len);
213 int mz_compress2(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len, int level);
214 
215 // mz_compressBound() returns a (very) conservative upper bound on the amount of data that could be generated by calling mz_compress().
216 mz_ulong mz_compressBound(mz_ulong source_len);
217 
218 // Initializes a decompressor.
219 int mz_inflateInit(mz_streamp pStream);
220 
221 // 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:
222 // window_bits must be MZ_DEFAULT_WINDOW_BITS (to parse zlib header/footer) or -MZ_DEFAULT_WINDOW_BITS (raw deflate).
223 int mz_inflateInit2(mz_streamp pStream, int window_bits);
224 
225 // 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.
226 // Parameters:
227 //   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.
228 //   flush may be MZ_NO_FLUSH, MZ_SYNC_FLUSH, or MZ_FINISH.
229 //   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).
230 //   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.
231 // Return values:
232 //   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.
233 //   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.
234 //   MZ_STREAM_ERROR if the stream is bogus.
235 //   MZ_DATA_ERROR if the deflate stream is invalid.
236 //   MZ_PARAM_ERROR if one of the parameters is invalid.
237 //   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
238 //   with more input data, or with more room in the output buffer (except when using single call decompression, described above).
239 int mz_inflate(mz_streamp pStream, int flush);
240 
241 // Deinitializes a decompressor.
242 int mz_inflateEnd(mz_streamp pStream);
243 
244 // Single-call decompression.
245 // Returns MZ_OK on success, or one of the error codes from mz_inflate() on failure.
246 int mz_uncompress(unsigned char *pDest, mz_ulong *pDest_len, const unsigned char *pSource, mz_ulong source_len);
247 
248 // Returns a string description of the specified error code, or NULL if the error code is invalid.
249 const char *mz_error(int err);
250 
251 // 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.
252 // Define MINIZ_NO_ZLIB_COMPATIBLE_NAMES to disable zlib-compatibility if you use zlib in the same project.
253 #ifndef MINIZ_NO_ZLIB_COMPATIBLE_NAMES
254 typedef unsigned char Byte;
255 typedef unsigned int uInt;
256 typedef mz_ulong uLong;
257 typedef Byte Bytef;
258 typedef uInt uIntf;
259 typedef char charf;
260 typedef int intf;
261 typedef void *voidpf;
262 typedef uLong uLongf;
263 typedef void *voidp;
264 typedef void *const voidpc;
265 #define Z_NULL                0
266 #define Z_NO_FLUSH            MZ_NO_FLUSH
267 #define Z_PARTIAL_FLUSH       MZ_PARTIAL_FLUSH
268 #define Z_SYNC_FLUSH          MZ_SYNC_FLUSH
269 #define Z_FULL_FLUSH          MZ_FULL_FLUSH
270 #define Z_FINISH              MZ_FINISH
271 #define Z_BLOCK               MZ_BLOCK
272 #define Z_OK                  MZ_OK
273 #define Z_STREAM_END          MZ_STREAM_END
274 #define Z_NEED_DICT           MZ_NEED_DICT
275 #define Z_ERRNO               MZ_ERRNO
276 #define Z_STREAM_ERROR        MZ_STREAM_ERROR
277 #define Z_DATA_ERROR          MZ_DATA_ERROR
278 #define Z_MEM_ERROR           MZ_MEM_ERROR
279 #define Z_BUF_ERROR           MZ_BUF_ERROR
280 #define Z_VERSION_ERROR       MZ_VERSION_ERROR
281 #define Z_PARAM_ERROR         MZ_PARAM_ERROR
282 #define Z_NO_COMPRESSION      MZ_NO_COMPRESSION
283 #define Z_BEST_SPEED          MZ_BEST_SPEED
284 #define Z_BEST_COMPRESSION    MZ_BEST_COMPRESSION
285 #define Z_DEFAULT_COMPRESSION MZ_DEFAULT_COMPRESSION
286 #define Z_DEFAULT_STRATEGY    MZ_DEFAULT_STRATEGY
287 #define Z_FILTERED            MZ_FILTERED
288 #define Z_HUFFMAN_ONLY        MZ_HUFFMAN_ONLY
289 #define Z_RLE                 MZ_RLE
290 #define Z_FIXED               MZ_FIXED
291 #define Z_DEFLATED            MZ_DEFLATED
292 #define Z_DEFAULT_WINDOW_BITS MZ_DEFAULT_WINDOW_BITS
293 #define alloc_func            mz_alloc_func
294 #define free_func             mz_free_func
295 #define internal_state        mz_internal_state
296 #define z_stream              mz_stream
297 #define deflateInit           mz_deflateInit
298 #define deflateInit2          mz_deflateInit2
299 #define deflateReset          mz_deflateReset
300 #define deflate               mz_deflate
301 #define deflateEnd            mz_deflateEnd
302 #define deflateBound          mz_deflateBound
303 #define compress              mz_compress
304 #define compress2             mz_compress2
305 #define compressBound         mz_compressBound
306 #define inflateInit           mz_inflateInit
307 #define inflateInit2          mz_inflateInit2
308 #define inflate               mz_inflate
309 #define inflateEnd            mz_inflateEnd
310 #define uncompress            mz_uncompress
311 #define crc32                 mz_crc32
312 #define adler32               mz_adler32
313 #define MAX_WBITS             15
314 #define MAX_MEM_LEVEL         9
315 #define zError                mz_error
316 #define ZLIB_VERSION          MZ_VERSION
317 #define ZLIB_VERNUM           MZ_VERNUM
318 #define ZLIB_VER_MAJOR        MZ_VER_MAJOR
319 #define ZLIB_VER_MINOR        MZ_VER_MINOR
320 #define ZLIB_VER_REVISION     MZ_VER_REVISION
321 #define ZLIB_VER_SUBREVISION  MZ_VER_SUBREVISION
322 #define zlibVersion           mz_version
323 #define zlib_version          mz_version()
324 #endif // #ifndef MINIZ_NO_ZLIB_COMPATIBLE_NAMES
325 
326 #endif // MINIZ_NO_ZLIB_APIS
327 
328 // ------------------- Types and macros
329 
330 typedef unsigned char mz_uint8;
331 typedef signed short mz_int16;
332 typedef unsigned short mz_uint16;
333 typedef unsigned int mz_uint32;
334 typedef unsigned int mz_uint;
335 typedef long long mz_int64;
336 typedef unsigned long long mz_uint64;
337 typedef int mz_bool;
338 
339 #define MZ_FALSE (0)
340 #define MZ_TRUE (1)
341 
342 // An attempt to work around MSVC's spammy "warning C4127: conditional expression is constant" message.
343 #ifdef _MSC_VER
344 #define MZ_MACRO_END while (0, 0)
345 #else
346 #define MZ_MACRO_END while (0)
347 #endif
348 
349 // ------------------- ZIP archive reading/writing
350 
351 #ifndef MINIZ_NO_ARCHIVE_APIS
352 
353 enum {
354     MZ_ZIP_MAX_IO_BUF_SIZE = 64 * 1024,
355     MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE = 260,
356     MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE = 256
357 };
358 
359 typedef struct {
360     mz_uint32 m_file_index;
361     mz_uint32 m_central_dir_ofs;
362     mz_uint16 m_version_made_by;
363     mz_uint16 m_version_needed;
364     mz_uint16 m_bit_flag;
365     mz_uint16 m_method;
366 #ifndef MINIZ_NO_TIME
367     time_t m_time;
368 #endif
369     mz_uint32 m_crc32;
370     mz_uint64 m_comp_size;
371     mz_uint64 m_uncomp_size;
372     mz_uint16 m_internal_attr;
373     mz_uint32 m_external_attr;
374     mz_uint64 m_local_header_ofs;
375     mz_uint32 m_comment_size;
376     char m_filename[MZ_ZIP_MAX_ARCHIVE_FILENAME_SIZE];
377     char m_comment[MZ_ZIP_MAX_ARCHIVE_FILE_COMMENT_SIZE];
378 } mz_zip_archive_file_stat;
379 
380 typedef size_t (*mz_file_read_func)(void *pOpaque, mz_uint64 file_ofs, void *pBuf, size_t n);
381 typedef size_t (*mz_file_write_func)(void *pOpaque, mz_uint64 file_ofs, const void *pBuf, size_t n);
382 
383 struct mz_zip_internal_state_tag;
384 typedef struct mz_zip_internal_state_tag mz_zip_internal_state;
385 
386 typedef enum {
387     MZ_ZIP_MODE_INVALID = 0,
388     MZ_ZIP_MODE_READING = 1,
389     MZ_ZIP_MODE_WRITING = 2,
390     MZ_ZIP_MODE_WRITING_HAS_BEEN_FINALIZED = 3
391 } mz_zip_mode;
392 
393 typedef struct mz_zip_archive_tag {
394     mz_uint64 m_archive_size;
395     mz_uint64 m_central_directory_file_ofs;
396     mz_uint m_total_files;
397     mz_zip_mode m_zip_mode;
398 
399     mz_uint m_file_offset_alignment;
400 
401     mz_alloc_func m_pAlloc;
402     mz_free_func m_pFree;
403     mz_realloc_func m_pRealloc;
404     void *m_pAlloc_opaque;
405 
406     mz_file_read_func m_pRead;
407     mz_file_write_func m_pWrite;
408     void *m_pIO_opaque;
409 
410     mz_zip_internal_state *m_pState;
411 
412 } mz_zip_archive;
413 
414 typedef enum {
415     MZ_ZIP_FLAG_CASE_SENSITIVE                = 0x0100,
416     MZ_ZIP_FLAG_IGNORE_PATH                   = 0x0200,
417     MZ_ZIP_FLAG_COMPRESSED_DATA               = 0x0400,
418     MZ_ZIP_FLAG_DO_NOT_SORT_CENTRAL_DIRECTORY = 0x0800
419 } mz_zip_flags;
420 
421 // ZIP archive reading
422 
423 // Inits a ZIP archive reader.
424 // These functions read and validate the archive's central directory.
425 mz_bool mz_zip_reader_init(mz_zip_archive *pZip, mz_uint64 size, mz_uint32 flags);
426 mz_bool mz_zip_reader_init_mem(mz_zip_archive *pZip, const void *pMem, size_t size, mz_uint32 flags);
427 
428 #ifndef MINIZ_NO_STDIO
429 mz_bool mz_zip_reader_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint32 flags);
430 #endif
431 
432 // Returns the total number of files in the archive.
433 mz_uint mz_zip_reader_get_num_files(mz_zip_archive *pZip);
434 
435 // Returns detailed information about an archive file entry.
436 mz_bool mz_zip_reader_file_stat(mz_zip_archive *pZip, mz_uint file_index, mz_zip_archive_file_stat *pStat);
437 
438 // Determines if an archive file entry is a directory entry.
439 mz_bool mz_zip_reader_is_file_a_directory(mz_zip_archive *pZip, mz_uint file_index);
440 mz_bool mz_zip_reader_is_file_encrypted(mz_zip_archive *pZip, mz_uint file_index);
441 
442 // Retrieves the filename of an archive file entry.
443 // 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.
444 mz_uint mz_zip_reader_get_filename(mz_zip_archive *pZip, mz_uint file_index, char *pFilename, mz_uint filename_buf_size);
445 
446 // Attempts to locates a file in the archive's central directory.
447 // Valid flags: MZ_ZIP_FLAG_CASE_SENSITIVE, MZ_ZIP_FLAG_IGNORE_PATH
448 // Returns -1 if the file cannot be found.
449 int mz_zip_reader_locate_file(mz_zip_archive *pZip, const char *pName, const char *pComment, mz_uint flags);
450 
451 // Extracts a archive file to a memory buffer using no memory allocation.
452 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);
453 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);
454 
455 // Extracts a archive file to a memory buffer.
456 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);
457 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);
458 
459 // Extracts a archive file to a dynamically allocated heap buffer.
460 void *mz_zip_reader_extract_to_heap(mz_zip_archive *pZip, mz_uint file_index, size_t *pSize, mz_uint flags);
461 void *mz_zip_reader_extract_file_to_heap(mz_zip_archive *pZip, const char *pFilename, size_t *pSize, mz_uint flags);
462 
463 // Extracts a archive file using a callback function to output the file's data.
464 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);
465 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);
466 
467 #ifndef MINIZ_NO_STDIO
468 // Extracts a archive file to a disk file and sets its last accessed and modified times.
469 // This function only extracts files, not archive directory records.
470 mz_bool mz_zip_reader_extract_to_file(mz_zip_archive *pZip, mz_uint file_index, const char *pDst_filename, mz_uint flags);
471 mz_bool mz_zip_reader_extract_file_to_file(mz_zip_archive *pZip, const char *pArchive_filename, const char *pDst_filename, mz_uint flags);
472 #endif
473 
474 // Ends archive reading, freeing all allocations, and closing the input archive file if mz_zip_reader_init_file() was used.
475 mz_bool mz_zip_reader_end(mz_zip_archive *pZip);
476 
477 // ZIP archive writing
478 
479 #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
480 
481 // Inits a ZIP archive writer.
482 mz_bool mz_zip_writer_init(mz_zip_archive *pZip, mz_uint64 existing_size);
483 mz_bool mz_zip_writer_init_heap(mz_zip_archive *pZip, size_t size_to_reserve_at_beginning, size_t initial_allocation_size);
484 
485 #ifndef MINIZ_NO_STDIO
486 mz_bool mz_zip_writer_init_file(mz_zip_archive *pZip, const char *pFilename, mz_uint64 size_to_reserve_at_beginning);
487 #endif
488 
489 // Converts a ZIP archive reader object into a writer object, to allow efficient in-place file appends to occur on an existing archive.
490 // 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.
491 // 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).
492 // Finally, for archives opened using mz_zip_reader_init, the mz_zip_archive's user provided m_pWrite function cannot be NULL.
493 // Note: In-place archive modification is not recommended unless you know what you're doing, because if execution stops or something goes wrong before
494 // the archive is finalized the file's central directory will be hosed.
495 mz_bool mz_zip_writer_init_from_reader(mz_zip_archive *pZip, const char *pFilename);
496 
497 // Adds the contents of a memory buffer to an archive. These functions record the current local time into the archive.
498 // To add a directory entry, call this method with an archive name ending in a forwardslash with empty buffer.
499 // level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION.
500 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);
501 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);
502 
503 #ifndef MINIZ_NO_STDIO
504 // Adds the contents of a disk file to an archive. This function also records the disk file's modified time into the archive.
505 // level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION.
506 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);
507 #endif
508 
509 // Adds a file to an archive by fully cloning the data from another archive.
510 // This function fully clones the source file's compressed data (no recompression), along with its full filename, extra data, and comment fields.
511 mz_bool mz_zip_writer_add_from_zip_reader(mz_zip_archive *pZip, mz_zip_archive *pSource_zip, mz_uint file_index);
512 
513 // Finalizes the archive by writing the central directory records followed by the end of central directory record.
514 // After an archive is finalized, the only valid call on the mz_zip_archive struct is mz_zip_writer_end().
515 // An archive must be manually finalized by calling this function for it to be valid.
516 mz_bool mz_zip_writer_finalize_archive(mz_zip_archive *pZip);
517 mz_bool mz_zip_writer_finalize_heap_archive(mz_zip_archive *pZip, void **pBuf, size_t *pSize);
518 
519 // Ends archive writing, freeing all allocations, and closing the output file if mz_zip_writer_init_file() was used.
520 // Note for the archive to be valid, it must have been finalized before ending.
521 mz_bool mz_zip_writer_end(mz_zip_archive *pZip);
522 
523 // Misc. high-level helper functions:
524 
525 // mz_zip_add_mem_to_archive_file_in_place() efficiently (but not atomically) appends a memory blob to a ZIP archive.
526 // level_and_flags - compression level (0-10, see MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc.) logically OR'd with zero or more mz_zip_flags, or just set to MZ_DEFAULT_COMPRESSION.
527 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);
528 
529 // Reads a single file from an archive into a heap block.
530 // Returns NULL on failure.
531 void *mz_zip_extract_archive_file_to_heap(const char *pZip_filename, const char *pArchive_name, size_t *pSize, mz_uint zip_flags);
532 
533 #endif // #ifndef MINIZ_NO_ARCHIVE_WRITING_APIS
534 
535 #endif // #ifndef MINIZ_NO_ARCHIVE_APIS
536 
537 // ------------------- Low-level Decompression API Definitions
538 
539 // Decompression flags used by tinfl_decompress().
540 // TINFL_FLAG_PARSE_ZLIB_HEADER: If set, the input has a valid zlib header and ends with an adler32 checksum (it's a valid zlib stream). Otherwise, the input is a raw deflate stream.
541 // TINFL_FLAG_HAS_MORE_INPUT: If set, there are more input bytes available beyond the end of the supplied input buffer. If clear, the input buffer contains all remaining input.
542 // TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF: If set, the output buffer is large enough to hold the entire decompressed stream. If clear, the output buffer is at least the size of the dictionary (typically 32KB).
543 // TINFL_FLAG_COMPUTE_ADLER32: Force adler-32 checksum computation of the decompressed bytes.
544 enum {
545     TINFL_FLAG_PARSE_ZLIB_HEADER = 1,
546     TINFL_FLAG_HAS_MORE_INPUT = 2,
547     TINFL_FLAG_USING_NON_WRAPPING_OUTPUT_BUF = 4,
548     TINFL_FLAG_COMPUTE_ADLER32 = 8
549 };
550 
551 // High level decompression functions:
552 // tinfl_decompress_mem_to_heap() decompresses a block in memory to a heap block allocated via malloc().
553 // On entry:
554 //  pSrc_buf, src_buf_len: Pointer and size of the Deflate or zlib source data to decompress.
555 // On return:
556 //  Function returns a pointer to the decompressed data, or NULL on failure.
557 //  *pOut_len will be set to the decompressed data's size, which could be larger than src_buf_len on uncompressible data.
558 //  The caller must call mz_free() on the returned block when it's no longer needed.
559 void *tinfl_decompress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags);
560 
561 // tinfl_decompress_mem_to_mem() decompresses a block in memory to another block in memory.
562 // Returns TINFL_DECOMPRESS_MEM_TO_MEM_FAILED on failure, or the number of bytes written on success.
563 #define TINFL_DECOMPRESS_MEM_TO_MEM_FAILED ((size_t)(-1))
564 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);
565 
566 // 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.
567 // Returns 1 on success or 0 or -1 on failure.
568 typedef int (*tinfl_put_buf_func_ptr)(const void* pBuf, int len, void *pUser);
569 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);
570 
571 struct tinfl_decompressor_tag; typedef struct tinfl_decompressor_tag tinfl_decompressor;
572 
573 // Max size of LZ dictionary.
574 #define TINFL_LZ_DICT_SIZE 32768
575 
576 // Return status.
577 typedef enum {
578     TINFL_STATUS_BAD_PARAM = -3,
579     TINFL_STATUS_ADLER32_MISMATCH = -2,
580     TINFL_STATUS_FAILED = -1,
581     TINFL_STATUS_DONE = 0,
582     TINFL_STATUS_NEEDS_MORE_INPUT = 1,
583     TINFL_STATUS_HAS_MORE_OUTPUT = 2
584 } tinfl_status;
585 
586 // Initializes the decompressor to its initial state.
587 #define tinfl_init(r) do { (r)->m_state = 0; } MZ_MACRO_END
588 #define tinfl_get_adler32(r) (r)->m_check_adler32
589 
590 // 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.
591 // 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.
592 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);
593 
594 // Internal/private bits follow.
595 enum {
596     TINFL_MAX_HUFF_TABLES = 3, TINFL_MAX_HUFF_SYMBOLS_0 = 288, TINFL_MAX_HUFF_SYMBOLS_1 = 32, TINFL_MAX_HUFF_SYMBOLS_2 = 19,
597     TINFL_FAST_LOOKUP_BITS = 10, TINFL_FAST_LOOKUP_SIZE = 1 << TINFL_FAST_LOOKUP_BITS
598 };
599 
600 typedef struct {
601     mz_uint8 m_code_size[TINFL_MAX_HUFF_SYMBOLS_0];
602     mz_int16 m_look_up[TINFL_FAST_LOOKUP_SIZE], m_tree[TINFL_MAX_HUFF_SYMBOLS_0 * 2];
603 } tinfl_huff_table;
604 
605 #if MINIZ_HAS_64BIT_REGISTERS
606 #define TINFL_USE_64BIT_BITBUF 1
607 #endif
608 
609 #if TINFL_USE_64BIT_BITBUF
610 typedef mz_uint64 tinfl_bit_buf_t;
611 #define TINFL_BITBUF_SIZE (64)
612 #else
613 typedef mz_uint32 tinfl_bit_buf_t;
614 #define TINFL_BITBUF_SIZE (32)
615 #endif
616 
617 struct tinfl_decompressor_tag {
618     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];
619     tinfl_bit_buf_t m_bit_buf;
620     size_t m_dist_from_out_buf_start;
621     tinfl_huff_table m_tables[TINFL_MAX_HUFF_TABLES];
622     mz_uint8 m_raw_header[4], m_len_codes[TINFL_MAX_HUFF_SYMBOLS_0 + TINFL_MAX_HUFF_SYMBOLS_1 + 137];
623 };
624 
625 // ------------------- Low-level Compression API Definitions
626 
627 // Set TDEFL_LESS_MEMORY to 1 to use less memory (compression will be slightly slower, and raw/dynamic blocks will be output more frequently).
628 #define TDEFL_LESS_MEMORY 1
629 
630 // tdefl_init() compression flags logically OR'd together (low 12 bits contain the max. number of probes per dictionary search):
631 // 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).
632 enum {
633     TDEFL_HUFFMAN_ONLY = 0, TDEFL_DEFAULT_MAX_PROBES = 128, TDEFL_MAX_PROBES_MASK = 0xFFF
634 };
635 
636 // 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.
637 // TDEFL_COMPUTE_ADLER32: Always compute the adler-32 of the input data (even when not writing zlib headers).
638 // TDEFL_GREEDY_PARSING_FLAG: Set to use faster greedy parsing, instead of more efficient lazy parsing.
639 // 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).
640 // TDEFL_RLE_MATCHES: Only look for RLE matches (matches with a distance of 1)
641 // TDEFL_FILTER_MATCHES: Discards matches <= 5 chars if enabled.
642 // TDEFL_FORCE_ALL_STATIC_BLOCKS: Disable usage of optimized Huffman tables.
643 // TDEFL_FORCE_ALL_RAW_BLOCKS: Only use raw (uncompressed) deflate blocks.
644 // The low 12 bits are reserved to control the max # of hash probes per dictionary lookup (see TDEFL_MAX_PROBES_MASK).
645 enum {
646     TDEFL_WRITE_ZLIB_HEADER             = 0x01000,
647     TDEFL_COMPUTE_ADLER32               = 0x02000,
648     TDEFL_GREEDY_PARSING_FLAG           = 0x04000,
649     TDEFL_NONDETERMINISTIC_PARSING_FLAG = 0x08000,
650     TDEFL_RLE_MATCHES                   = 0x10000,
651     TDEFL_FILTER_MATCHES                = 0x20000,
652     TDEFL_FORCE_ALL_STATIC_BLOCKS       = 0x40000,
653     TDEFL_FORCE_ALL_RAW_BLOCKS          = 0x80000
654 };
655 
656 // High level compression functions:
657 // tdefl_compress_mem_to_heap() compresses a block in memory to a heap block allocated via malloc().
658 // On entry:
659 //  pSrc_buf, src_buf_len: Pointer and size of source block to compress.
660 //  flags: The max match finder probes (default is 128) logically OR'd against the above flags. Higher probes are slower but improve compression.
661 // On return:
662 //  Function returns a pointer to the compressed data, or NULL on failure.
663 //  *pOut_len will be set to the compressed data's size, which could be larger than src_buf_len on uncompressible data.
664 //  The caller must free() the returned block when it's no longer needed.
665 void *tdefl_compress_mem_to_heap(const void *pSrc_buf, size_t src_buf_len, size_t *pOut_len, int flags);
666 
667 // tdefl_compress_mem_to_mem() compresses a block in memory to another block in memory.
668 // Returns 0 on failure.
669 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);
670 
671 // Compresses an image to a compressed PNG file in memory.
672 // On entry:
673 //  pImage, w, h, and num_chans describe the image to compress. num_chans may be 1, 2, 3, or 4.
674 //  The image pitch in bytes per scanline will be w*num_chans. The leftmost pixel on the top scanline is stored first in memory.
675 //  level may range from [0,10], use MZ_NO_COMPRESSION, MZ_BEST_SPEED, MZ_BEST_COMPRESSION, etc. or a decent default is MZ_DEFAULT_LEVEL
676 //  If flip is true, the image will be flipped on the Y axis (useful for OpenGL apps).
677 // On return:
678 //  Function returns a pointer to the compressed data, or NULL on failure.
679 //  *pLen_out will be set to the size of the PNG image file.
680 //  The caller must mz_free() the returned heap block (which will typically be larger than *pLen_out) when it's no longer needed.
681 void *tdefl_write_image_to_png_file_in_memory_ex(const void *pImage, int w, int h, int num_chans, size_t *pLen_out, mz_uint level, mz_bool flip);
682 void *tdefl_write_image_to_png_file_in_memory(const void *pImage, int w, int h, int num_chans, size_t *pLen_out);
683 
684 // Output stream interface. The compressor uses this interface to write compressed data. It'll typically be called TDEFL_OUT_BUF_SIZE at a time.
685 typedef mz_bool (*tdefl_put_buf_func_ptr)(const void *pBuf, int len, void *pUser);
686 
687 // tdefl_compress_mem_to_output() compresses a block to an output stream. The above helpers use this function internally.
688 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);
689 
690 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 };
691 
692 // TDEFL_OUT_BUF_SIZE MUST be large enough to hold a single entire compressed output block (using static/fixed Huffman codes).
693 #if TDEFL_LESS_MEMORY
694 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 };
695 #else
696 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 };
697 #endif
698 
699 // 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.
700 typedef enum {
701     TDEFL_STATUS_BAD_PARAM = -2,
702     TDEFL_STATUS_PUT_BUF_FAILED = -1,
703     TDEFL_STATUS_OKAY = 0,
704     TDEFL_STATUS_DONE = 1,
705 } tdefl_status;
706 
707 // Must map to MZ_NO_FLUSH, MZ_SYNC_FLUSH, etc. enums
708 typedef enum {
709     TDEFL_NO_FLUSH = 0,
710     TDEFL_SYNC_FLUSH = 2,
711     TDEFL_FULL_FLUSH = 3,
712     TDEFL_FINISH = 4
713 } tdefl_flush;
714 
715 // tdefl's compression state structure.
716 typedef struct {
717     tdefl_put_buf_func_ptr m_pPut_buf_func;
718     void *m_pPut_buf_user;
719     mz_uint m_flags, m_max_probes[2];
720     int m_greedy_parsing;
721     mz_uint m_adler32, m_lookahead_pos, m_lookahead_size, m_dict_size;
722     mz_uint8 *m_pLZ_code_buf, *m_pLZ_flags, *m_pOutput_buf, *m_pOutput_buf_end;
723     mz_uint m_num_flags_left, m_total_lz_bytes, m_lz_code_buf_dict_pos, m_bits_in, m_bit_buffer;
724     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;
725     tdefl_status m_prev_return_status;
726     const void *m_pIn_buf;
727     void *m_pOut_buf;
728     size_t *m_pIn_buf_size, *m_pOut_buf_size;
729     tdefl_flush m_flush;
730     const mz_uint8 *m_pSrc;
731     size_t m_src_buf_left, m_out_buf_ofs;
732     mz_uint8 m_dict[TDEFL_LZ_DICT_SIZE + TDEFL_MAX_MATCH_LEN - 1];
733     mz_uint16 m_huff_count[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS];
734     mz_uint16 m_huff_codes[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS];
735     mz_uint8 m_huff_code_sizes[TDEFL_MAX_HUFF_TABLES][TDEFL_MAX_HUFF_SYMBOLS];
736     mz_uint8 m_lz_code_buf[TDEFL_LZ_CODE_BUF_SIZE];
737     mz_uint16 m_next[TDEFL_LZ_DICT_SIZE];
738     mz_uint16 m_hash[TDEFL_LZ_HASH_SIZE];
739     mz_uint8 m_output_buf[TDEFL_OUT_BUF_SIZE];
740 } tdefl_compressor;
741 
742 // Initializes the compressor.
743 // There is no corresponding deinit() function because the tdefl API's do not dynamically allocate memory.
744 // pBut_buf_func: If **not** NULL, output data will be supplied to the specified callback. In this case, the user should call the tdefl_compress_buffer() API for compression.
745 // If pBut_buf_func is NULL the user should always call the tdefl_compress() API.
746 // flags: See the above enums (TDEFL_HUFFMAN_ONLY, TDEFL_WRITE_ZLIB_HEADER, etc.)
747 tdefl_status tdefl_init(tdefl_compressor *d, tdefl_put_buf_func_ptr pPut_buf_func, void *pPut_buf_user, int flags);
748 
749 // Compresses a block of data, consuming as much of the specified input buffer as possible, and writing as much compressed data to the specified output buffer as possible.
750 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);
751 
752 // tdefl_compress_buffer() is only usable when the tdefl_init() is called with a non-NULL tdefl_put_buf_func_ptr.
753 // tdefl_compress_buffer() always consumes the entire input buffer.
754 tdefl_status tdefl_compress_buffer(tdefl_compressor *d, const void *pIn_buf, size_t in_buf_size, tdefl_flush flush);
755 
756 tdefl_status tdefl_get_prev_return_status(tdefl_compressor *d);
757 mz_uint32 tdefl_get_adler32(tdefl_compressor *d);
758 
759 // Can't use tdefl_create_comp_flags_from_zip_params if MINIZ_NO_ZLIB_APIS isn't defined, because it uses some of its macros.
760 #ifndef MINIZ_NO_ZLIB_APIS
761 // Create tdefl_compress() flags given zlib-style compression parameters.
762 // level may range from [0,10] (where 10 is absolute max compression, but may be much slower on some files)
763 // window_bits may be -15 (raw deflate) or 15 (zlib)
764 // strategy may be either MZ_DEFAULT_STRATEGY, MZ_FILTERED, MZ_HUFFMAN_ONLY, MZ_RLE, or MZ_FIXED
765 mz_uint tdefl_create_comp_flags_from_zip_params(int level, int window_bits, int strategy);
766 #endif // #ifndef MINIZ_NO_ZLIB_APIS
767 
768 #ifdef __cplusplus
769 }
770 #endif
771 
772 #endif // MINIZ_HEADER_INCLUDED
773