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Added deflater.c module from Piotr

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2456 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2003-09-28 19:11:46 +00:00
parent 176a9be552
commit b9e15ea410
1 changed files with 90 additions and 0 deletions
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90
util/zlib/deflater.c Normal file
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/*
* Compresses data to the DEFLATE format.
* The compressed data is ready to use with inflatemem().
* Compile using e.g.
* gcc -O2 -o deflater deflater.c -lz
*
* Author: Piotr Fusik <fox@scene.pl>
*/
#include <stdio.h>
#include <stdlib.h>
#include <zlib.h>
#define IN_SIZE_MAX 60000U
#define OUT_SIZE_MAX 60000U
int main(int argc, char* argv[])
{
FILE* fp;
char* inbuf;
char* outbuf;
size_t inlen;
size_t outlen;
z_stream stream;
/* check command line */
if (argc != 3) {
fprintf(stderr,
"Compresses a file to the DEFLATE format.\n"
"24 Aug 2002, Piotr Fusik <fox@scene.pl>\n"
"Usage: deflater input_file deflated_file\n"
);
return 3;
}
/* alloc buffers */
inbuf = malloc(IN_SIZE_MAX);
outbuf = malloc(OUT_SIZE_MAX);
if (inbuf == NULL || outbuf == NULL) {
fprintf(stderr, "deflater: Out of memory!\n");
return 1;
}
/* read input file */
fp = fopen(argv[1], "rb");
if (fp == NULL) {
perror(argv[1]);
return 1;
}
inlen = fread(inbuf, 1, IN_SIZE_MAX, fp);
fclose(fp);
/* compress */
stream.next_in = inbuf;
stream.avail_in = inlen;
stream.next_out = outbuf;
stream.avail_out = OUT_SIZE_MAX;
stream.zalloc = (alloc_func) 0;
stream.zfree = (free_func) 0;
if (deflateInit2(&stream, Z_BEST_COMPRESSION, Z_DEFLATED,
-MAX_WBITS, 9, Z_DEFAULT_STRATEGY) != Z_OK) {
fprintf(stderr, "deflater: deflateInit2 failed\n");
return 1;
}
if (deflate(&stream, Z_FINISH) != Z_STREAM_END) {
fprintf(stderr, "deflater: deflate failed\n");
return 1;
}
if (deflateEnd(&stream) != Z_OK) {
fprintf(stderr, "deflater: deflateEnd failed\n");
return 1;
}
/* write output */
fp = fopen(argv[2], "wb");
if (fp == NULL) {
perror(argv[2]);
return 1;
}
outlen = fwrite(outbuf, 1, stream.total_out, fp);
fclose(fp);
if (outlen != stream.total_out) {
perror(argv[2]);
return 1;
}
/* display summary */
printf("Compressed %s (%d bytes) to %s (%d bytes)\n",
argv[1], inlen, argv[2], outlen);
return 0;
}