AuroraMiddleware/lz4
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

LZ4Demo now supports Pipe mode (inspired by Huan Truong mod)

Browse Source 
git-svn-id: https://lz4.googlecode.com/svn/trunk@13 650e7d94-2a16-8b24-b05c-7c0b3f6821cd
This commit is contained in:
yann.collet.73@gmail.com 2011-08-30 22:35:09 +00:00
parent 8860e61b4f
commit 3a6d9640fb
2 changed files with 54 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
lz4.c
View File

@ -41,7 +41,7 @@
// Lowering this value reduce memory usage
// It may also improve speed, especially if you reach L1 cache size (32KB for Intel, 64KB for AMD)
// Expanding memory usage typically improves compression ratio
// Memory usage formula : N->2^(N+2) Bytes (examples : 17 -> 512KB ; 12 -> 16KB)
// Memory usage formula for 32 bits systems : N->2^(N+2) Bytes (examples : 17 -> 512KB ; 12 -> 16KB)
#define HASH_LOG 12

74
main.c
View File

@ -26,8 +26,9 @@
//****************************
// Includes
//****************************
#include <stdio.h> // printf, fopen, fread
#include <stdio.h> // fprintf, fopen, fread
#include <stdlib.h> // malloc
#include <string.h> // strcmp
#include "lz4.h"
@ -74,19 +75,21 @@
//****************************
int usage()
{
printf("Usage :\n");
printf(" %s [arg] input output\n",BINARY_NAME);
printf("Arguments :\n");
printf(" -c : force compression (default)\n");
printf(" -d : force decompression \n");
printf(" -h : help (this text)\n");
fprintf(stderr, "Usage :\n");
fprintf(stderr, " %s [arg] input output\n",BINARY_NAME);
fprintf(stderr, "Arguments :\n");
fprintf(stderr, " -c : force compression (default)\n");
fprintf(stderr, " -d : force decompression \n");
fprintf(stderr, " -h : help (this text)\n");
fprintf(stderr, "input : can be 'stdin' (pipe) or a filename\n");
fprintf(stderr, "output : can be 'stdout' (pipe) or a filename\n");
return 0;
}
int badusage()
{
printf("Wrong parameters\n");
fprintf(stderr, "Wrong parameters\n");
usage();
return 0;
}
@ -98,11 +101,27 @@ int compress_file(char* input_filename, char* output_filename)
U64 compressedfilesize = ARCHIVE_MAGICNUMBER_SIZE;
char* in_buff;
char* out_buff;
FILE* finput = fopen( input_filename, "rb" );
FILE* foutput = fopen( output_filename, "wb" );
FILE* finput;
FILE* foutput;
char stdinmark[] = "stdin";
char stdoutmark[] = "stdout";
if (!strcmp (input_filename, stdinmark)) {
fprintf(stderr, "Using stdin for input\n");
finput = stdin;
} else {
finput = fopen( input_filename, "rb" );
}
if (!strcmp (output_filename, stdoutmark)) {
fprintf(stderr, "Using stdout for output\n");
foutput = stdout;
} else {
foutput = fopen( output_filename, "wb" );
}
if ( finput==0 ) { printf("Pb opening %s\n", input_filename); return 2; }
if ( foutput==0) { printf("Pb opening %s\n", output_filename); return 3; }
if ( finput==0 ) { fprintf(stderr, "Pb opening %s\n", input_filename); return 2; }
if ( foutput==0) { fprintf(stderr, "Pb opening %s\n", output_filename); return 3; }
// Allocate Memory
in_buff = malloc(CHUNKSIZE);
@ -131,7 +150,7 @@ int compress_file(char* input_filename, char* output_filename)
}
// Status
printf("Compressed %llu bytes into %llu bytes ==> %.2f%%\n",
fprintf(stderr, "Compressed %llu bytes into %llu bytes ==> %.2f%%\n",
(unsigned long long) filesize, (unsigned long long) compressedfilesize, (double)compressedfilesize/filesize*100);
fclose(finput);
@ -146,14 +165,27 @@ int decode_file(char* input_filename, char* output_filename)
U64 filesize = 0;
char* in_buff;
char* out_buff;
FILE* finput = fopen( input_filename, "rb" );
FILE* foutput = fopen( output_filename, "wb" );
size_t uselessRet;
int sinkint;
U32 nextSize;
if (finput==0 ) { printf("Pb opening %s\n", input_filename); return 4; }
if (foutput==0) { printf("Pb opening %s\n", output_filename); return 5; }
FILE* finput;
FILE* foutput;
char stdinmark[] = "stdin";
char stdoutmark[] = "stdout";
if (!strcmp (input_filename, stdinmark)) {
fprintf(stderr, "Using stdin for input\n");
finput = stdin;
} else {
finput = fopen( input_filename, "rb" );
}
if (!strcmp (output_filename, stdoutmark)) {
fprintf(stderr, "Using stdout for output\n");
foutput = stdout;
} else {
foutput = fopen( output_filename, "wb" );
}
// Allocate Memory
in_buff = malloc(OUT_CHUNKSIZE);
@ -161,7 +193,7 @@ int decode_file(char* input_filename, char* output_filename)
// Check Archive Header
uselessRet = fread(out_buff, 1, ARCHIVE_MAGICNUMBER_SIZE, finput);
if (*(U32*)out_buff != ARCHIVE_MAGICNUMBER) { printf("Wrong file : cannot be decoded\n"); return 6; }
if (*(U32*)out_buff != ARCHIVE_MAGICNUMBER) { fprintf(stderr,"Wrong file : cannot be decoded\n"); return 6; }
uselessRet = fread(in_buff, 1, 4, finput);
nextSize = *(U32*)in_buff;
@ -190,7 +222,7 @@ int decode_file(char* input_filename, char* output_filename)
fwrite(out_buff, 1, sinkint, foutput);
// Status
printf("Successfully decoded %llu bytes \n", (unsigned long long)filesize);
fprintf(stderr, "Successfully decoded %llu bytes \n", (unsigned long long)filesize);
fclose(finput);
fclose(foutput);
@ -208,7 +240,7 @@ int main(int argc, char** argv)
*output_filename=0;
// Welcome message
printf(WELCOME_MESSAGE);
fprintf(stderr, WELCOME_MESSAGE);
if (argc<2) { badusage(); return 1; }