diff options
Diffstat (limited to 'programs/lz4cli.c')
| -rw-r--r-- | programs/lz4cli.c | 37 |
1 files changed, 35 insertions, 2 deletions
diff --git a/programs/lz4cli.c b/programs/lz4cli.c index ba519b4..26a8089 100644 --- a/programs/lz4cli.c +++ b/programs/lz4cli.c @@ -110,7 +110,7 @@ static int usage(const char* exeName) DISPLAY( " -9 : High compression \n"); DISPLAY( " -d : decompression (default for %s extension)\n", LZ4_EXTENSION); DISPLAY( " -z : force compression \n"); - DISPLAY( " -D FILE: use dictionary in FILE \n"); + DISPLAY( " -D FILE: use FILE as dictionary \n"); DISPLAY( " -f : overwrite output without prompting \n"); DISPLAY( " -k : preserve source files(s) (default) \n"); DISPLAY( "--rm : remove source file(s) after successful de/compression \n"); @@ -141,6 +141,7 @@ static int usage_advanced(const char* exeName) DISPLAY( "--content-size : compressed frame includes original size (default:not present)\n"); DISPLAY( "--[no-]sparse : sparse mode (default:enabled on file, disabled on stdout)\n"); DISPLAY( "--favor-decSpeed: compressed files decompress faster, but are less compressed \n"); + DISPLAY( "--fast[=#]: switch to ultra fast compression level (default: %u)\n", 1); DISPLAY( "Benchmark arguments : \n"); DISPLAY( " -b# : benchmark file(s), using # compression level (default : 1) \n"); DISPLAY( " -e# : test all compression levels from -bX to # (default : 1)\n"); @@ -272,13 +273,26 @@ static unsigned readU32FromChar(const char** stringPtr) return result; } +/** longCommandWArg() : + * check if *stringPtr is the same as longCommand. + * If yes, @return 1 and advances *stringPtr to the position which immediately follows longCommand. + * @return 0 and doesn't modify *stringPtr otherwise. + */ +static unsigned longCommandWArg(const char** stringPtr, const char* longCommand) +{ + size_t const comSize = strlen(longCommand); + int const result = !strncmp(*stringPtr, longCommand, comSize); + if (result) *stringPtr += comSize; + return result; +} + typedef enum { om_auto, om_compress, om_decompress, om_test, om_bench } operationMode_e; int main(int argc, const char** argv) { int i, cLevel=1, - cLevelLast=1, + cLevelLast=-10000, legacy_format=0, forceStdout=0, main_pause=0, @@ -363,6 +377,25 @@ int main(int argc, const char** argv) if (!strcmp(argument, "--help")) { usage_advanced(exeName); goto _cleanup; } if (!strcmp(argument, "--keep")) { LZ4IO_setRemoveSrcFile(0); continue; } /* keep source file (default) */ if (!strcmp(argument, "--rm")) { LZ4IO_setRemoveSrcFile(1); continue; } + if (longCommandWArg(&argument, "--fast")) { + /* Parse optional acceleration factor */ + if (*argument == '=') { + U32 fastLevel; + ++argument; + fastLevel = readU32FromChar(&argument); + if (fastLevel) { + cLevel = -(int)fastLevel; + } else { + badusage(exeName); + } + } else if (*argument != 0) { + /* Invalid character following --fast */ + badusage(exeName); + } else { + cLevel = -1; /* default for --fast */ + } + continue; + } } while (argument[1]!=0) { |