The Tor Browser / file comparison
comparison: js/src/vm/Compression.h
js/src/vm/Compression.h
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:cd8d438b62f4 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- | |
| 2 * vim: set ts=8 sts=4 et sw=4 tw=99: | |
| 3 * This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #ifndef vm_Compression_h | |
| 8 #define vm_Compression_h | |
| 9 | |
| 10 #ifdef USE_ZLIB | |
| 11 | |
| 12 #include <zlib.h> | |
| 13 | |
| 14 #include "jstypes.h" | |
| 15 | |
| 16 namespace js { | |
| 17 | |
| 18 class Compressor | |
| 19 { | |
| 20 /* Number of bytes we should hand to zlib each compressMore() call. */ | |
| 21 static const size_t CHUNKSIZE = 2048; | |
| 22 z_stream zs; | |
| 23 const unsigned char *inp; | |
| 24 size_t inplen; | |
| 25 size_t outbytes; | |
| 26 bool initialized; | |
| 27 | |
| 28 public: | |
| 29 enum Status { | |
| 30 MOREOUTPUT, | |
| 31 DONE, | |
| 32 CONTINUE, | |
| 33 OOM | |
| 34 }; | |
| 35 | |
| 36 Compressor(const unsigned char *inp, size_t inplen); | |
| 37 ~Compressor(); | |
| 38 bool init(); | |
| 39 void setOutput(unsigned char *out, size_t outlen); | |
| 40 size_t outWritten() const { return outbytes; } | |
| 41 /* Compress some of the input. Return true if it should be called again. */ | |
| 42 Status compressMore(); | |
| 43 }; | |
| 44 | |
| 45 /* | |
| 46 * Decompress a string. The caller must know the length of the output and | |
| 47 * allocate |out| to a string of that length. | |
| 48 */ | |
| 49 bool DecompressString(const unsigned char *inp, size_t inplen, | |
| 50 unsigned char *out, size_t outlen); | |
| 51 | |
| 52 } /* namespace js */ | |
| 53 | |
| 54 #endif /* USE_ZLIB */ | |
| 55 #endif /* vm_Compression_h */ |
