other-licenses/snappy/src/snappy-c.cc@97036ab72558 (annotated)
other-licenses/snappy/src/snappy-c.cc
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | // Copyright 2011 Martin Gieseking <martin.gieseking@uos.de>. |
| michael@0 | 2 | // |
| michael@0 | 3 | // Redistribution and use in source and binary forms, with or without |
| michael@0 | 4 | // modification, are permitted provided that the following conditions are |
| michael@0 | 5 | // met: |
| michael@0 | 6 | // |
| michael@0 | 7 | // * Redistributions of source code must retain the above copyright |
| michael@0 | 8 | // notice, this list of conditions and the following disclaimer. |
| michael@0 | 9 | // * Redistributions in binary form must reproduce the above |
| michael@0 | 10 | // copyright notice, this list of conditions and the following disclaimer |
| michael@0 | 11 | // in the documentation and/or other materials provided with the |
| michael@0 | 12 | // distribution. |
| michael@0 | 13 | // * Neither the name of Google Inc. nor the names of its |
| michael@0 | 14 | // contributors may be used to endorse or promote products derived from |
| michael@0 | 15 | // this software without specific prior written permission. |
| michael@0 | 16 | // |
| michael@0 | 17 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| michael@0 | 18 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| michael@0 | 19 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| michael@0 | 20 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| michael@0 | 21 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| michael@0 | 22 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| michael@0 | 23 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| michael@0 | 24 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| michael@0 | 25 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| michael@0 | 26 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| michael@0 | 27 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| michael@0 | 28 | |
| michael@0 | 29 | #include "snappy.h" |
| michael@0 | 30 | #include "snappy-c.h" |
| michael@0 | 31 | |
| michael@0 | 32 | extern "C" { |
| michael@0 | 33 | |
| michael@0 | 34 | snappy_status snappy_compress(const char* input, |
| michael@0 | 35 | size_t input_length, |
| michael@0 | 36 | char* compressed, |
| michael@0 | 37 | size_t *compressed_length) { |
| michael@0 | 38 | if (*compressed_length < snappy_max_compressed_length(input_length)) { |
| michael@0 | 39 | return SNAPPY_BUFFER_TOO_SMALL; |
| michael@0 | 40 | } |
| michael@0 | 41 | snappy::RawCompress(input, input_length, compressed, compressed_length); |
| michael@0 | 42 | return SNAPPY_OK; |
| michael@0 | 43 | } |
| michael@0 | 44 | |
| michael@0 | 45 | snappy_status snappy_uncompress(const char* compressed, |
| michael@0 | 46 | size_t compressed_length, |
| michael@0 | 47 | char* uncompressed, |
| michael@0 | 48 | size_t* uncompressed_length) { |
| michael@0 | 49 | size_t real_uncompressed_length; |
| michael@0 | 50 | if (!snappy::GetUncompressedLength(compressed, |
| michael@0 | 51 | compressed_length, |
| michael@0 | 52 | &real_uncompressed_length)) { |
| michael@0 | 53 | return SNAPPY_INVALID_INPUT; |
| michael@0 | 54 | } |
| michael@0 | 55 | if (*uncompressed_length < real_uncompressed_length) { |
| michael@0 | 56 | return SNAPPY_BUFFER_TOO_SMALL; |
| michael@0 | 57 | } |
| michael@0 | 58 | if (!snappy::RawUncompress(compressed, compressed_length, uncompressed)) { |
| michael@0 | 59 | return SNAPPY_INVALID_INPUT; |
| michael@0 | 60 | } |
| michael@0 | 61 | *uncompressed_length = real_uncompressed_length; |
| michael@0 | 62 | return SNAPPY_OK; |
| michael@0 | 63 | } |
| michael@0 | 64 | |
| michael@0 | 65 | size_t snappy_max_compressed_length(size_t source_length) { |
| michael@0 | 66 | return snappy::MaxCompressedLength(source_length); |
| michael@0 | 67 | } |
| michael@0 | 68 | |
| michael@0 | 69 | snappy_status snappy_uncompressed_length(const char *compressed, |
| michael@0 | 70 | size_t compressed_length, |
| michael@0 | 71 | size_t *result) { |
| michael@0 | 72 | if (snappy::GetUncompressedLength(compressed, |
| michael@0 | 73 | compressed_length, |
| michael@0 | 74 | result)) { |
| michael@0 | 75 | return SNAPPY_OK; |
| michael@0 | 76 | } else { |
| michael@0 | 77 | return SNAPPY_INVALID_INPUT; |
| michael@0 | 78 | } |
| michael@0 | 79 | } |
| michael@0 | 80 | |
| michael@0 | 81 | snappy_status snappy_validate_compressed_buffer(const char *compressed, |
| michael@0 | 82 | size_t compressed_length) { |
| michael@0 | 83 | if (snappy::IsValidCompressedBuffer(compressed, compressed_length)) { |
| michael@0 | 84 | return SNAPPY_OK; |
| michael@0 | 85 | } else { |
| michael@0 | 86 | return SNAPPY_INVALID_INPUT; |
| michael@0 | 87 | } |
| michael@0 | 88 | } |
| michael@0 | 89 | |
| michael@0 | 90 | } // extern "C" |
