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| author | Takayuki MATSUOKA <takayuki.matsuoka@gmail.com> | 2015-02-12 06:46:02 (GMT) |
|---|---|---|
| committer | Takayuki MATSUOKA <takayuki.matsuoka@gmail.com> | 2015-03-02 04:38:23 (GMT) |
| commit | 97679fa5a17d79f87c0a2d1e2d44c3215d48958b (patch) | |
| tree | 9d9db433095cf72cc1de2c7d2a8914e2b59078cc /programs/lz4cli.c | |
| parent | 67f3b4141af0a33e9590e4678f06724076b7b69e (diff) | |
| download | lz4-97679fa5a17d79f87c0a2d1e2d44c3215d48958b.zip lz4-97679fa5a17d79f87c0a2d1e2d44c3215d48958b.tar.gz lz4-97679fa5a17d79f87c0a2d1e2d44c3215d48958b.tar.bz2 | |
Google Code Issue 155: lz4 cli should support sparse file
https://code.google.com/p/lz4/issues/detail?id=155
This is experimental implementation. Just a proof of concept.
It works Linux and Windows.
# Build
To build experimental version, define 'LZ4IO_ENABLE_SPARSE_FILE' like the following command :
make lz4programs 'CFLAGS=-O3 -DLZ4IO_ENABLE_SPARSE_FILE=1'
./programs/lz4 -h
You will see "EXPERIMENTAL_SPARSE_FILE" as lz4 revision :
"*** LZ4 command line interface 64-bits EXPERIMENTAL_SPARSE_FILE, by Yann Collet (...) ***"
# Experiment
This experimental version adds option "-x" for sparse file for decompression.
You can use this option like this :
./programs/lz4 -9 -f my-file
./programs/lz4 -d -f -x my-file.lz4 my-file.lz4.out
cmp my-file my-file.lz4.out
Diffstat (limited to 'programs/lz4cli.c')
| -rw-r--r-- | programs/lz4cli.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/programs/lz4cli.c b/programs/lz4cli.c index 0da5dce..5b54143 100644 --- a/programs/lz4cli.c +++ b/programs/lz4cli.c @@ -83,6 +83,11 @@ /***************************** * Constants ******************************/ +#if defined(LZ4IO_ENABLE_SPARSE_FILE) +# undef LZ4_VERSION +# define LZ4_VERSION "EXPERIMENTAL_SPARSE_FILE" +#endif + #define COMPRESSOR_NAME "LZ4 command line interface" #ifndef LZ4_VERSION # define LZ4_VERSION "r126" @@ -186,6 +191,10 @@ static int usage_advanced(void) DISPLAY( " -y : overwrite output without prompting \n"); DISPLAY( " -s : suppress warnings \n"); #endif /* ENABLE_LZ4C_LEGACY_OPTIONS */ +#if defined(LZ4IO_ENABLE_SPARSE_FILE) + DISPLAY( "Experimental : Sparse file\n"); + DISPLAY( " -x : enable sparse file\n"); +#endif /* LZ4IO_ENABLE_SPARSE_FILE */ EXTENDED_HELP; return 0; } @@ -276,6 +285,9 @@ int main(int argc, char** argv) /* Init */ programName = argv[0]; LZ4IO_setOverwrite(0); +#if defined(LZ4IO_ENABLE_SPARSE_FILE) + LZ4IO_setSparseFile(0); +#endif /* LZ4IO_ENABLE_SPARSE_FILE */ blockSize = LZ4IO_setBlockSizeID(LZ4_BLOCKSIZEID_DEFAULT); /* lz4cat behavior */ @@ -403,6 +415,11 @@ int main(int argc, char** argv) /* Pause at the end (hidden option) */ case 'p': main_pause=1; BMK_SetPause(); break; +#if defined(LZ4IO_ENABLE_SPARSE_FILE) + /* Experimental : Enable sparse file */ + case 'x': LZ4IO_setSparseFile(1); break; +#endif /* LZ4IO_ENABLE_SPARSE_FILE */ + /* Specific commands for customized versions */ EXTENDED_ARGUMENTS; |