82 lines
1.6 KiB
C
82 lines
1.6 KiB
C
/* unbzip2.c -- decompress files in bzip2 format.
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*/
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#ifdef RCSID
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static char rcsid[] = "$Id: unbzip2.c,v 1.2 1999/08/20 00:08:57 simonb Exp $";
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#endif
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#define BZ_NO_STDIO
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#include <bzlib.h>
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#include <stddef.h>
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#include "gzip.h"
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/* ============================================================================
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* Bunzip2 in to out.
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*/
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int unbzip2(in, out)
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int in, out; /* input and output file descriptors */
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{
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int n, ret, end_of_file;
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bz_stream bzs;
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bzs.bzalloc = NULL;
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bzs.bzfree = NULL;
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bzs.opaque = NULL;
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end_of_file = 0;
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if (bzDecompressInit(&bzs, 0, 0) != BZ_OK)
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return(ERROR);
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/* Use up the remainder of "inbuf" that's been read in already */
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bzs.next_in = inbuf;
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bzs.avail_in = insize;
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while (1) {
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if (bzs.avail_in == 0 && !end_of_file) {
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n = read(in, inbuf, INBUFSIZ);
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if (n < 0)
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read_error();
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if (n == 0)
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end_of_file = 1;
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bzs.next_in = inbuf;
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bzs.avail_in = n;
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}
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bzs.next_out = outbuf;
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bzs.avail_out = OUTBUFSIZ;
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ret = bzDecompress(&bzs);
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if (ret == BZ_STREAM_END) {
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if (!test) {
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n = write(out, outbuf, OUTBUFSIZ - bzs.avail_out);
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if (n < 0)
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write_error();
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}
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break;
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}
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else if (ret == BZ_OK) {
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if (end_of_file)
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read_error();
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if (!test)
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n = write(out, outbuf, OUTBUFSIZ - bzs.avail_out);
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}
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else {
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switch (ret) {
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case BZ_DATA_ERROR:
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error("bzip2 data integrity error");
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case BZ_DATA_ERROR_MAGIC:
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error("bzip2 magic number error");
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case BZ_MEM_ERROR:
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error("bzip2 out of memory");
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}
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}
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}
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if (bzDecompressEnd(&bzs) != BZ_OK)
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return(ERROR);
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return(OK);
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}
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