mirror of https://github.com/google/snappy.git
91 lines
3.6 KiB
C++
91 lines
3.6 KiB
C++
// Copyright 2011 Martin Gieseking <martin.gieseking@uos.de>.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "snappy.h"
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#include "snappy-c.h"
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extern "C" {
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snappy_status snappy_compress(const char* input,
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size_t input_length,
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char* compressed,
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size_t *compressed_length) {
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if (*compressed_length < snappy_max_compressed_length(input_length)) {
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return SNAPPY_BUFFER_TOO_SMALL;
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}
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snappy::RawCompress(input, input_length, compressed, compressed_length);
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return SNAPPY_OK;
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}
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snappy_status snappy_uncompress(const char* compressed,
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size_t compressed_length,
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char* uncompressed,
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size_t* uncompressed_length) {
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size_t real_uncompressed_length;
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if (!snappy::GetUncompressedLength(compressed,
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compressed_length,
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&real_uncompressed_length)) {
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return SNAPPY_INVALID_INPUT;
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}
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if (*uncompressed_length < real_uncompressed_length) {
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return SNAPPY_BUFFER_TOO_SMALL;
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}
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if (!snappy::RawUncompress(compressed, compressed_length, uncompressed)) {
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return SNAPPY_INVALID_INPUT;
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}
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*uncompressed_length = real_uncompressed_length;
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return SNAPPY_OK;
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}
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size_t snappy_max_compressed_length(size_t source_length) {
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return snappy::MaxCompressedLength(source_length);
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}
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snappy_status snappy_uncompressed_length(const char *compressed,
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size_t compressed_length,
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size_t *result) {
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if (snappy::GetUncompressedLength(compressed,
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compressed_length,
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result)) {
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return SNAPPY_OK;
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} else {
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return SNAPPY_INVALID_INPUT;
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}
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}
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snappy_status snappy_validate_compressed_buffer(const char *compressed,
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size_t compressed_length) {
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if (snappy::IsValidCompressedBuffer(compressed, compressed_length)) {
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return SNAPPY_OK;
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} else {
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return SNAPPY_INVALID_INPUT;
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}
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}
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} // extern "C"
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