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update -H documentation regarding compression levels

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This commit is contained in:
Yann Collet 2024-09-04 11:03:28 -07:00
parent e0781fbe4b
commit 217bdb2f2f
2 changed files with 6 additions and 3 deletions
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7
programs/lz4cli.c
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@ -208,8 +208,11 @@ static int usage_longhelp(const char* exeName)
DISPLAY( "\n"); DISPLAY( "\n");
DISPLAY( "Compression levels : \n"); DISPLAY( "Compression levels : \n");
DISPLAY( "---------------------\n"); DISPLAY( "---------------------\n");
DISPLAY( "-0 ... -2 => Fast compression, all identical\n"); DISPLAY( "-0 => Default level, identical to -%u \n", LZ4_CLEVEL_DEFAULT);
DISPLAY( "-3 ... -%d => High compression; higher number == more compression but slower\n", LZ4HC_CLEVEL_MAX); DISPLAY( "-1 => Fast compression \n");
DISPLAY( "-2 .. -%d => High compression; higher number == more compression but slower\n", LZ4HC_CLEVEL_MAX);
DISPLAY( "--best => Highest available compression level (-%d) \n", LZ4HC_CLEVEL_MAX);
DISPLAY( "--fast=# => Faster compression; higher number == faster but compress less\n");
DISPLAY( "\n"); DISPLAY( "\n");
DISPLAY( "stdin, stdout and the console : \n"); DISPLAY( "stdin, stdout and the console : \n");
DISPLAY( "--------------------------------\n"); DISPLAY( "--------------------------------\n");

2
programs/lz4conf.h
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@ -28,7 +28,7 @@
/* Default compression level. /* Default compression level.
* Can be overridden by environment variable LZ4_CLEVEL. * Can be overridden by environment variable LZ4_CLEVEL.
* Can be overridden at runtime using -# command */ * Is overridden at runtime by command -# */
#ifndef LZ4_CLEVEL_DEFAULT #ifndef LZ4_CLEVEL_DEFAULT
# define LZ4_CLEVEL_DEFAULT 1 # define LZ4_CLEVEL_DEFAULT 1
#endif #endif