other-licenses/7zstub/src/7zip/Compress/RangeCoder/RangeCoderOpt.h@97036ab72558
other-licenses/7zstub/src/7zip/Compress/RangeCoder/RangeCoderOpt.h
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.
1 // Compress/RangeCoder/RangeCoderOpt.h
3 #ifndef __COMPRESS_RANGECODER_OPT_H
4 #define __COMPRESS_RANGECODER_OPT_H
6 #define RC_INIT_VAR \
7 UInt32 range = rangeDecoder->Range; \
8 UInt32 code = rangeDecoder->Code;
10 #define RC_FLUSH_VAR \
11 rangeDecoder->Range = range; \
12 rangeDecoder->Code = code;
14 #define RC_NORMALIZE \
15 if (range < NCompress::NRangeCoder::kTopValue) \
16 { code = (code << 8) | rangeDecoder->Stream.ReadByte(); range <<= 8; }
18 #define RC_GETBIT2(numMoveBits, prob, mi, A0, A1) \
19 { UInt32 bound = (range >> NCompress::NRangeCoder::kNumBitModelTotalBits) * prob; \
20 if (code < bound) \
21 { A0; range = bound; \
22 prob += (NCompress::NRangeCoder::kBitModelTotal - prob) >> numMoveBits; \
23 mi <<= 1; } \
24 else \
25 { A1; range -= bound; code -= bound; prob -= (prob) >> numMoveBits; \
26 mi = (mi + mi) + 1; }} \
27 RC_NORMALIZE
29 #define RC_GETBIT(numMoveBits, prob, mi) RC_GETBIT2(numMoveBits, prob, mi, ; , ;)
31 #endif
