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-/*
-Copyright 2011 Google Inc. All Rights Reserved.
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
- http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-
-Author: lode.vandevenne@gmail.com (Lode Vandevenne)
-Author: jyrki.alakuijala@gmail.com (Jyrki Alakuijala)
-*/
-
-#ifndef ZOPFLI_ZOPFLI_H_
-#define ZOPFLI_ZOPFLI_H_
-
-#include <stddef.h>
-#include <stdlib.h> /* for size_t */
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-/*
-Options used throughout the program.
-*/
-typedef struct ZopfliOptions {
- /* Whether to print output */
- int verbose;
-
- /* Whether to print more detailed output */
- int verbose_more;
-
- /*
- Maximum amount of times to rerun forward and backward pass to optimize LZ77
- compression cost. Good values: 10, 15 for small files, 5 for files over
- several MB in size or it will be too slow.
- */
- int numiterations;
-
- /*
- If true, splits the data in multiple deflate blocks with optimal choice
- for the block boundaries. Block splitting gives better compression. Default:
- true (1).
- */
- int blocksplitting;
-
- /*
- If true, chooses the optimal block split points only after doing the iterative
- LZ77 compression. If false, chooses the block split points first, then does
- iterative LZ77 on each individual block. Depending on the file, either first
- or last gives the best compression. Default: false (0).
- */
- int blocksplittinglast;
-
- /*
- Maximum amount of blocks to split into (0 for unlimited, but this can give
- extreme results that hurt compression on some files). Default value: 15.
- */
- int blocksplittingmax;
-} ZopfliOptions;
-
-/* Initializes options with default values. */
-void ZopfliInitOptions(ZopfliOptions* options);
-
-/* Output format */
-typedef enum {
- ZOPFLI_FORMAT_GZIP,
- ZOPFLI_FORMAT_ZLIB,
- ZOPFLI_FORMAT_DEFLATE
-} ZopfliFormat;
-
-/*
-Compresses according to the given output format and appends the result to the
-output.
-
-options: global program options
-output_type: the output format to use
-out: pointer to the dynamic output array to which the result is appended. Must
- be freed after use
-outsize: pointer to the dynamic output array size
-*/
-void ZopfliCompress(const ZopfliOptions* options, ZopfliFormat output_type,
- const unsigned char* in, size_t insize,
- unsigned char** out, size_t* outsize);
-
-#ifdef __cplusplus
-} // extern "C"
-#endif
-
-#endif /* ZOPFLI_ZOPFLI_H_ */