115 lines
3.2 KiB
C++
115 lines
3.2 KiB
C++
/*
|
|
Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; version 2 of the License.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <my_global.h>
|
|
#include <welcome_copyright_notice.h>
|
|
|
|
#include "lz4/lz4frame.h"
|
|
#include <string.h>
|
|
|
|
static void usage()
|
|
{
|
|
printf("%s Ver 1.7 for %s at %s\n","lz4_decompress",SYSTEM_TYPE,
|
|
MACHINE_TYPE);
|
|
puts(ORACLE_WELCOME_COPYRIGHT_NOTICE("2015"));
|
|
puts("Decompress data compressed by mysqlpump using lz4 compression "
|
|
"algorithm by reading from input file and writing uncompressed "
|
|
"data to output file");
|
|
printf("Usage: %s input_file output_file\n", "lz4_decompress");
|
|
}
|
|
|
|
static const int INPUT_BUFFER_SIZE= 1024 * 1024;
|
|
static const int OUTPUT_BUFFER_SIZE= 1024 * 1024;
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
if (argc != 3)
|
|
{
|
|
usage();
|
|
exit(1);
|
|
}
|
|
FILE* input_file= fopen(argv[1], "rb");
|
|
FILE* output_file= fopen(argv[2], "wb");
|
|
if (input_file == NULL)
|
|
{
|
|
fprintf(stderr,
|
|
"lz4_decompress: [Error] Cannot open input file for reading.\n"
|
|
);
|
|
exit(1);
|
|
}
|
|
if (output_file == NULL)
|
|
{
|
|
fprintf(stderr,
|
|
"lz4_decompress: [Error] Cannot create output file.\n"
|
|
);
|
|
exit(1);
|
|
}
|
|
LZ4F_decompressionContext_t decompression_context;
|
|
LZ4F_createDecompressionContext(&decompression_context, LZ4F_VERSION);
|
|
char* input_buffer= new char[INPUT_BUFFER_SIZE];
|
|
char* output_buffer= new char[OUTPUT_BUFFER_SIZE];
|
|
bool is_eof= false;
|
|
|
|
while (!is_eof)
|
|
{
|
|
int bytes_read= fread(input_buffer, 1, INPUT_BUFFER_SIZE, input_file);
|
|
|
|
if (bytes_read < INPUT_BUFFER_SIZE)
|
|
{
|
|
is_eof= feof(input_file);
|
|
if (!is_eof)
|
|
{
|
|
fprintf(stderr,
|
|
"lz4_decompress: [Error] Encountered problem during reading input.\n"
|
|
);
|
|
exit(1);
|
|
}
|
|
}
|
|
|
|
size_t bytes_processed= 0;
|
|
|
|
for (;;)
|
|
{
|
|
size_t current_bytes_processed= bytes_read - bytes_processed;
|
|
size_t bytes_to_write= OUTPUT_BUFFER_SIZE;
|
|
size_t result= LZ4F_decompress(decompression_context, output_buffer,
|
|
&bytes_to_write, input_buffer + bytes_processed,
|
|
¤t_bytes_processed, NULL);
|
|
if (LZ4F_isError(result))
|
|
{
|
|
fprintf(stderr,
|
|
"lz4_decompress: [Error] Encountered problem during decompression.\n"
|
|
);
|
|
exit(1);
|
|
}
|
|
bytes_processed+= current_bytes_processed;
|
|
|
|
if (bytes_to_write == 0)
|
|
break;
|
|
|
|
fwrite(output_buffer, 1, bytes_to_write, output_file);
|
|
}
|
|
}
|
|
|
|
LZ4F_freeDecompressionContext(decompression_context);
|
|
delete[] input_buffer;
|
|
delete[] output_buffer;
|
|
fclose(input_file);
|
|
fclose(output_file);
|
|
exit(0);
|
|
}
|