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Added : Sparse write support

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--[no-]sparse command
This commit is contained in:
Yann Collet
2016-05-23 16:56:56 +02:00
parent da4fe741b8
commit 75424d1139
3 changed files with 91 additions and 5 deletions
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3
programs/zstdcli.c
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@ -132,6 +132,7 @@ static int usage_advanced(const char* programName)
#ifndef ZSTD_NOCOMPRESS
DISPLAY( "--ultra : enable ultra modes (requires more memory to decompress)\n");
#endif
DISPLAY( "--[no-]sparse : sparse mode (default:enabled on file, disabled on stdout)\n");
#ifndef ZSTD_NODICT
DISPLAY( "\n");
DISPLAY( "Dictionary builder :\n");
@ -229,6 +230,8 @@ int main(int argCount, const char** argv)
if (!strcmp(argument, "--maxdict")) { nextArgumentIsMaxDict=1; continue; }
if (!strcmp(argument, "--keep")) { continue; } /* does nothing, since preserving input is default; for gzip/xz compatibility */
if (!strcmp(argument, "--ultra")) { FIO_setMaxWLog(0); continue; }
if (!strcmp(argument, "--sparse")) { FIO_setSparseWrite(2); continue; }
if (!strcmp(argument, "--no-sparse")) { FIO_setSparseWrite(0); continue; }
/* '-' means stdin/stdout */
if (!strcmp(argument, "-")){