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71 lines
2.8 KiB
71 lines
2.8 KiB
4 months ago
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// Copyright 2014 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef THIRD_PARTY_ZLIB_GOOGLE_COMPRESSION_UTILS_H_
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#define THIRD_PARTY_ZLIB_GOOGLE_COMPRESSION_UTILS_H_
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#include <string>
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#include "base/containers/span.h"
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namespace compression {
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// Compresses the data in |input| using gzip, storing the result in
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// |output_buffer|, of size |output_buffer_size|. If the buffer is large enough
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// and compression succeeds, |compressed_size| points to the compressed data
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// size after the call.
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// |malloc_fn| and |free_fn| are pointers to malloc() and free()-like functions,
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// or nullptr to use the standard ones.
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// Returns true for success.
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bool GzipCompress(base::span<const char> input,
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char* output_buffer,
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size_t output_buffer_size,
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size_t* compressed_size,
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void* (*malloc_fn)(size_t),
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void (*free_fn)(void*));
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// Compresses the data in |input| using gzip, storing the result in |output|.
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// |input| and |output| are allowed to point to the same string (in-place
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// operation).
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// Returns true for success.
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bool GzipCompress(base::span<const char> input, std::string* output);
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// Like the above method, but using uint8_t instead.
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bool GzipCompress(base::span<const uint8_t> input, std::string* output);
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// Uncompresses the data in |input| using gzip, storing the result in |output|.
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// |input| and |output| are allowed to be the same string (in-place operation).
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// Returns true for success.
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bool GzipUncompress(const std::string& input, std::string* output);
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// Like the above method, but uses base::span to avoid allocations if
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// needed. |output|'s size must be at least as large as the return value from
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// GetUncompressedSize.
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// Returns true for success.
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bool GzipUncompress(base::span<const char> input,
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base::span<const char> output);
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// Like the above method, but using uint8_t instead.
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bool GzipUncompress(base::span<const uint8_t> input,
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base::span<const uint8_t> output);
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// Uncompresses the data in |input| using gzip, and writes the results to
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// |output|, which must NOT be the underlying string of |input|, and is resized
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// if necessary.
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// Returns true for success.
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bool GzipUncompress(base::span<const char> input, std::string* output);
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// Like the above method, but using uint8_t instead.
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bool GzipUncompress(base::span<const uint8_t> input, std::string* output);
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// Returns the uncompressed size from GZIP-compressed |compressed_data|.
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uint32_t GetUncompressedSize(base::span<const char> compressed_data);
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// Like the above method, but using uint8_t instead.
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uint32_t GetUncompressedSize(base::span<const uint8_t> compressed_data);
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} // namespace compression
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#endif // THIRD_PARTY_ZLIB_GOOGLE_COMPRESSION_UTILS_H_
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