71cfbce65
Natanael Copa
2016-08-15
Subject
gzip: fix compression level bug. Closes 9131
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Architecture & Compiler Flags
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Commit Diff GitHub →
archival/gzip.c+1 -4
| @@ -2220,10 +2220,7 @@ int gzip_main(int argc UNUSED_PARAM, char **argv) | |
| opt >>= ENABLE_GUNZIP ? 7 : 5; /* drop cfv[dt]qn bits */ | |
| if (opt == 0) | |
| opt = 1 << 6; /* default: 6 */ | |
| - | /* Map 1..3 to 4 */ |
| - | if (opt & 0x7) |
| - | opt |= 1 << 4; |
| - | opt = ffs(opt >> 3); |
| + | opt = ffs(opt >> 4); /* Maps -1..-4 to [0], -5 to [1] ... -9 to [5] */ |
| max_chain_length = 1 << gzip_level_config[opt].chain_shift; | |
| good_match = gzip_level_config[opt].good; | |
| max_lazy_match = gzip_level_config[opt].lazy2 * 2; | |