Python code coverage for Modules/zlib/minigzip.c

#	count	content
1	n/a	/* minigzip.c -- simulate gzip using the zlib compression library
2	n/a	* Copyright (C) 1995-2006, 2010, 2011 Jean-loup Gailly.
3	n/a	* For conditions of distribution and use, see copyright notice in zlib.h
4	n/a	*/
5	n/a
6	n/a	/*
7	n/a	* minigzip is a minimal implementation of the gzip utility. This is
8	n/a	* only an example of using zlib and isn't meant to replace the
9	n/a	* full-featured gzip. No attempt is made to deal with file systems
10	n/a	* limiting names to 14 or 8+3 characters, etc... Error checking is
11	n/a	* very limited. So use minigzip only for testing; use gzip for the
12	n/a	* real thing. On MSDOS, use only on file names without extension
13	n/a	* or in pipe mode.
14	n/a	*/
15	n/a
16	n/a	/* @(#) $Id$ */
17	n/a
18	n/a	#include "zlib.h"
19	n/a	#include <stdio.h>
20	n/a
21	n/a	#ifdef STDC
22	n/a	# include <string.h>
23	n/a	# include <stdlib.h>
24	n/a	#endif
25	n/a
26	n/a	#ifdef USE_MMAP
27	n/a	# include <sys/types.h>
28	n/a	# include <sys/mman.h>
29	n/a	# include <sys/stat.h>
30	n/a	#endif
31	n/a
32	n/a	#if defined(MSDOS) \|\| defined(OS2) \|\| defined(WIN32) \|\| defined(__CYGWIN__)
33	n/a	# include <fcntl.h>
34	n/a	# include <io.h>
35	n/a	# ifdef UNDER_CE
36	n/a	# include <stdlib.h>
37	n/a	# endif
38	n/a	# define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
39	n/a	#else
40	n/a	# define SET_BINARY_MODE(file)
41	n/a	#endif
42	n/a
43	n/a	#ifdef _MSC_VER
44	n/a	# define snprintf _snprintf
45	n/a	#endif
46	n/a
47	n/a	#ifdef VMS
48	n/a	# define unlink delete
49	n/a	# define GZ_SUFFIX "-gz"
50	n/a	#endif
51	n/a	#ifdef RISCOS
52	n/a	# define unlink remove
53	n/a	# define GZ_SUFFIX "-gz"
54	n/a	# define fileno(file) file->__file
55	n/a	#endif
56	n/a	#if defined(__MWERKS__) && __dest_os != __be_os && __dest_os != __win32_os
57	n/a	# include <unix.h> /* for fileno */
58	n/a	#endif
59	n/a
60	n/a	#if !defined(Z_HAVE_UNISTD_H) && !defined(_LARGEFILE64_SOURCE)
61	n/a	#ifndef WIN32 /* unlink already in stdio.h for WIN32 */
62	n/a	extern int unlink OF((const char *));
63	n/a	#endif
64	n/a	#endif
65	n/a
66	n/a	#if defined(UNDER_CE)
67	n/a	# include <windows.h>
68	n/a	# define perror(s) pwinerror(s)
69	n/a
70	n/a	/* Map the Windows error number in ERROR to a locale-dependent error
71	n/a	message string and return a pointer to it. Typically, the values
72	n/a	for ERROR come from GetLastError.
73	n/a
74	n/a	The string pointed to shall not be modified by the application,
75	n/a	but may be overwritten by a subsequent call to strwinerror
76	n/a
77	n/a	The strwinerror function does not change the current setting
78	n/a	of GetLastError. */
79	n/a
80	n/a	static char *strwinerror (error)
81	n/a	DWORD error;
82	n/a	{
83	n/a	static char buf[1024];
84	n/a
85	n/a	wchar_t *msgbuf;
86	n/a	DWORD lasterr = GetLastError();
87	n/a	DWORD chars = FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM
88	n/a	\| FORMAT_MESSAGE_ALLOCATE_BUFFER,
89	n/a	NULL,
90	n/a	error,
91	n/a	0, /* Default language */
92	n/a	(LPVOID)&msgbuf,
93	n/a	0,
94	n/a	NULL);
95	n/a	if (chars != 0) {
96	n/a	/* If there is an \r\n appended, zap it. */
97	n/a	if (chars >= 2
98	n/a	&& msgbuf[chars - 2] == '\r' && msgbuf[chars - 1] == '\n') {
99	n/a	chars -= 2;
100	n/a	msgbuf[chars] = 0;
101	n/a	}
102	n/a
103	n/a	if (chars > sizeof (buf) - 1) {
104	n/a	chars = sizeof (buf) - 1;
105	n/a	msgbuf[chars] = 0;
106	n/a	}
107	n/a
108	n/a	wcstombs(buf, msgbuf, chars + 1);
109	n/a	LocalFree(msgbuf);
110	n/a	}
111	n/a	else {
112	n/a	sprintf(buf, "unknown win32 error (%ld)", error);
113	n/a	}
114	n/a
115	n/a	SetLastError(lasterr);
116	n/a	return buf;
117	n/a	}
118	n/a
119	n/a	static void pwinerror (s)
120	n/a	const char *s;
121	n/a	{
122	n/a	if (s && *s)
123	n/a	fprintf(stderr, "%s: %s\n", s, strwinerror(GetLastError ()));
124	n/a	else
125	n/a	fprintf(stderr, "%s\n", strwinerror(GetLastError ()));
126	n/a	}
127	n/a
128	n/a	#endif /* UNDER_CE */
129	n/a
130	n/a	#ifndef GZ_SUFFIX
131	n/a	# define GZ_SUFFIX ".gz"
132	n/a	#endif
133	n/a	#define SUFFIX_LEN (sizeof(GZ_SUFFIX)-1)
134	n/a
135	n/a	#define BUFLEN 16384
136	n/a	#define MAX_NAME_LEN 1024
137	n/a
138	n/a	#ifdef MAXSEG_64K
139	n/a	# define local static
140	n/a	/* Needed for systems with limitation on stack size. */
141	n/a	#else
142	n/a	# define local
143	n/a	#endif
144	n/a
145	n/a	#ifdef Z_SOLO
146	n/a	/* for Z_SOLO, create simplified gz* functions using deflate and inflate */
147	n/a
148	n/a	#if defined(Z_HAVE_UNISTD_H) \|\| defined(Z_LARGE)
149	n/a	# include <unistd.h> /* for unlink() */
150	n/a	#endif
151	n/a
152	n/a	void myalloc OF((void , unsigned, unsigned));
153	n/a	void myfree OF((void , void ));
154	n/a
155	n/a	void *myalloc(q, n, m)
156	n/a	void *q;
157	n/a	unsigned n, m;
158	n/a	{
159	n/a	q = Z_NULL;
160	n/a	return calloc(n, m);
161	n/a	}
162	n/a
163	n/a	void myfree(q, p)
164	n/a	void q, p;
165	n/a	{
166	n/a	q = Z_NULL;
167	n/a	free(p);
168	n/a	}
169	n/a
170	n/a	typedef struct gzFile_s {
171	n/a	FILE *file;
172	n/a	int write;
173	n/a	int err;
174	n/a	char *msg;
175	n/a	z_stream strm;
176	n/a	} *gzFile;
177	n/a
178	n/a	gzFile gzopen OF((const char , const char ));
179	n/a	gzFile gzdopen OF((int, const char *));
180	n/a	gzFile gz_open OF((const char , int, const char ));
181	n/a
182	n/a	gzFile gzopen(path, mode)
183	n/a	const char *path;
184	n/a	const char *mode;
185	n/a	{
186	n/a	return gz_open(path, -1, mode);
187	n/a	}
188	n/a
189	n/a	gzFile gzdopen(fd, mode)
190	n/a	int fd;
191	n/a	const char *mode;
192	n/a	{
193	n/a	return gz_open(NULL, fd, mode);
194	n/a	}
195	n/a
196	n/a	gzFile gz_open(path, fd, mode)
197	n/a	const char *path;
198	n/a	int fd;
199	n/a	const char *mode;
200	n/a	{
201	n/a	gzFile gz;
202	n/a	int ret;
203	n/a
204	n/a	gz = malloc(sizeof(struct gzFile_s));
205	n/a	if (gz == NULL)
206	n/a	return NULL;
207	n/a	gz->write = strchr(mode, 'w') != NULL;
208	n/a	gz->strm.zalloc = myalloc;
209	n/a	gz->strm.zfree = myfree;
210	n/a	gz->strm.opaque = Z_NULL;
211	n/a	if (gz->write)
212	n/a	ret = deflateInit2(&(gz->strm), -1, 8, 15 + 16, 8, 0);
213	n/a	else {
214	n/a	gz->strm.next_in = 0;
215	n/a	gz->strm.avail_in = Z_NULL;
216	n/a	ret = inflateInit2(&(gz->strm), 15 + 16);
217	n/a	}
218	n/a	if (ret != Z_OK) {
219	n/a	free(gz);
220	n/a	return NULL;
221	n/a	}
222	n/a	gz->file = path == NULL ? fdopen(fd, gz->write ? "wb" : "rb") :
223	n/a	fopen(path, gz->write ? "wb" : "rb");
224	n/a	if (gz->file == NULL) {
225	n/a	gz->write ? deflateEnd(&(gz->strm)) : inflateEnd(&(gz->strm));
226	n/a	free(gz);
227	n/a	return NULL;
228	n/a	}
229	n/a	gz->err = 0;
230	n/a	gz->msg = "";
231	n/a	return gz;
232	n/a	}
233	n/a
234	n/a	int gzwrite OF((gzFile, const void *, unsigned));
235	n/a
236	n/a	int gzwrite(gz, buf, len)
237	n/a	gzFile gz;
238	n/a	const void *buf;
239	n/a	unsigned len;
240	n/a	{
241	n/a	z_stream *strm;
242	n/a	unsigned char out[BUFLEN];
243	n/a
244	n/a	if (gz == NULL \|\| !gz->write)
245	n/a	return 0;
246	n/a	strm = &(gz->strm);
247	n/a	strm->next_in = (void *)buf;
248	n/a	strm->avail_in = len;
249	n/a	do {
250	n/a	strm->next_out = out;
251	n/a	strm->avail_out = BUFLEN;
252	n/a	(void)deflate(strm, Z_NO_FLUSH);
253	n/a	fwrite(out, 1, BUFLEN - strm->avail_out, gz->file);
254	n/a	} while (strm->avail_out == 0);
255	n/a	return len;
256	n/a	}
257	n/a
258	n/a	int gzread OF((gzFile, void *, unsigned));
259	n/a
260	n/a	int gzread(gz, buf, len)
261	n/a	gzFile gz;
262	n/a	void *buf;
263	n/a	unsigned len;
264	n/a	{
265	n/a	int ret;
266	n/a	unsigned got;
267	n/a	unsigned char in[1];
268	n/a	z_stream *strm;
269	n/a
270	n/a	if (gz == NULL \|\| gz->write)
271	n/a	return 0;
272	n/a	if (gz->err)
273	n/a	return 0;
274	n/a	strm = &(gz->strm);
275	n/a	strm->next_out = (void *)buf;
276	n/a	strm->avail_out = len;
277	n/a	do {
278	n/a	got = fread(in, 1, 1, gz->file);
279	n/a	if (got == 0)
280	n/a	break;
281	n/a	strm->next_in = in;
282	n/a	strm->avail_in = 1;
283	n/a	ret = inflate(strm, Z_NO_FLUSH);
284	n/a	if (ret == Z_DATA_ERROR) {
285	n/a	gz->err = Z_DATA_ERROR;
286	n/a	gz->msg = strm->msg;
287	n/a	return 0;
288	n/a	}
289	n/a	if (ret == Z_STREAM_END)
290	n/a	inflateReset(strm);
291	n/a	} while (strm->avail_out);
292	n/a	return len - strm->avail_out;
293	n/a	}
294	n/a
295	n/a	int gzclose OF((gzFile));
296	n/a
297	n/a	int gzclose(gz)
298	n/a	gzFile gz;
299	n/a	{
300	n/a	z_stream *strm;
301	n/a	unsigned char out[BUFLEN];
302	n/a
303	n/a	if (gz == NULL)
304	n/a	return Z_STREAM_ERROR;
305	n/a	strm = &(gz->strm);
306	n/a	if (gz->write) {
307	n/a	strm->next_in = Z_NULL;
308	n/a	strm->avail_in = 0;
309	n/a	do {
310	n/a	strm->next_out = out;
311	n/a	strm->avail_out = BUFLEN;
312	n/a	(void)deflate(strm, Z_FINISH);
313	n/a	fwrite(out, 1, BUFLEN - strm->avail_out, gz->file);
314	n/a	} while (strm->avail_out == 0);
315	n/a	deflateEnd(strm);
316	n/a	}
317	n/a	else
318	n/a	inflateEnd(strm);
319	n/a	fclose(gz->file);
320	n/a	free(gz);
321	n/a	return Z_OK;
322	n/a	}
323	n/a
324	n/a	const char gzerror OF((gzFile, int ));
325	n/a
326	n/a	const char *gzerror(gz, err)
327	n/a	gzFile gz;
328	n/a	int *err;
329	n/a	{
330	n/a	*err = gz->err;
331	n/a	return gz->msg;
332	n/a	}
333	n/a
334	n/a	#endif
335	n/a
336	n/a	char *prog;
337	n/a
338	n/a	void error OF((const char *msg));
339	n/a	void gz_compress OF((FILE *in, gzFile out));
340	n/a	#ifdef USE_MMAP
341	n/a	int gz_compress_mmap OF((FILE *in, gzFile out));
342	n/a	#endif
343	n/a	void gz_uncompress OF((gzFile in, FILE *out));
344	n/a	void file_compress OF((char file, char mode));
345	n/a	void file_uncompress OF((char *file));
346	n/a	int main OF((int argc, char *argv[]));
347	n/a
348	n/a	/* ===========================================================================
349	n/a	* Display error message and exit
350	n/a	*/
351	n/a	void error(msg)
352	n/a	const char *msg;
353	n/a	{
354	n/a	fprintf(stderr, "%s: %s\n", prog, msg);
355	n/a	exit(1);
356	n/a	}
357	n/a
358	n/a	/* ===========================================================================
359	n/a	* Compress input to output then close both files.
360	n/a	*/
361	n/a
362	n/a	void gz_compress(in, out)
363	n/a	FILE *in;
364	n/a	gzFile out;
365	n/a	{
366	n/a	local char buf[BUFLEN];
367	n/a	int len;
368	n/a	int err;
369	n/a
370	n/a	#ifdef USE_MMAP
371	n/a	/* Try first compressing with mmap. If mmap fails (minigzip used in a
372	n/a	* pipe), use the normal fread loop.
373	n/a	*/
374	n/a	if (gz_compress_mmap(in, out) == Z_OK) return;
375	n/a	#endif
376	n/a	for (;;) {
377	n/a	len = (int)fread(buf, 1, sizeof(buf), in);
378	n/a	if (ferror(in)) {
379	n/a	perror("fread");
380	n/a	exit(1);
381	n/a	}
382	n/a	if (len == 0) break;
383	n/a
384	n/a	if (gzwrite(out, buf, (unsigned)len) != len) error(gzerror(out, &err));
385	n/a	}
386	n/a	fclose(in);
387	n/a	if (gzclose(out) != Z_OK) error("failed gzclose");
388	n/a	}
389	n/a
390	n/a	#ifdef USE_MMAP /* MMAP version, Miguel Albrecht <malbrech@eso.org> */
391	n/a
392	n/a	/* Try compressing the input file at once using mmap. Return Z_OK if
393	n/a	* if success, Z_ERRNO otherwise.
394	n/a	*/
395	n/a	int gz_compress_mmap(in, out)
396	n/a	FILE *in;
397	n/a	gzFile out;
398	n/a	{
399	n/a	int len;
400	n/a	int err;
401	n/a	int ifd = fileno(in);
402	n/a	caddr_t buf; /* mmap'ed buffer for the entire input file */
403	n/a	off_t buf_len; /* length of the input file */
404	n/a	struct stat sb;
405	n/a
406	n/a	/* Determine the size of the file, needed for mmap: */
407	n/a	if (fstat(ifd, &sb) < 0) return Z_ERRNO;
408	n/a	buf_len = sb.st_size;
409	n/a	if (buf_len <= 0) return Z_ERRNO;
410	n/a
411	n/a	/* Now do the actual mmap: */
412	n/a	buf = mmap((caddr_t) 0, buf_len, PROT_READ, MAP_SHARED, ifd, (off_t)0);
413	n/a	if (buf == (caddr_t)(-1)) return Z_ERRNO;
414	n/a
415	n/a	/* Compress the whole file at once: */
416	n/a	len = gzwrite(out, (char *)buf, (unsigned)buf_len);
417	n/a
418	n/a	if (len != (int)buf_len) error(gzerror(out, &err));
419	n/a
420	n/a	munmap(buf, buf_len);
421	n/a	fclose(in);
422	n/a	if (gzclose(out) != Z_OK) error("failed gzclose");
423	n/a	return Z_OK;
424	n/a	}
425	n/a	#endif /* USE_MMAP */
426	n/a
427	n/a	/* ===========================================================================
428	n/a	* Uncompress input to output then close both files.
429	n/a	*/
430	n/a	void gz_uncompress(in, out)
431	n/a	gzFile in;
432	n/a	FILE *out;
433	n/a	{
434	n/a	local char buf[BUFLEN];
435	n/a	int len;
436	n/a	int err;
437	n/a
438	n/a	for (;;) {
439	n/a	len = gzread(in, buf, sizeof(buf));
440	n/a	if (len < 0) error (gzerror(in, &err));
441	n/a	if (len == 0) break;
442	n/a
443	n/a	if ((int)fwrite(buf, 1, (unsigned)len, out) != len) {
444	n/a	error("failed fwrite");
445	n/a	}
446	n/a	}
447	n/a	if (fclose(out)) error("failed fclose");
448	n/a
449	n/a	if (gzclose(in) != Z_OK) error("failed gzclose");
450	n/a	}
451	n/a
452	n/a
453	n/a	/* ===========================================================================
454	n/a	* Compress the given file: create a corresponding .gz file and remove the
455	n/a	* original.
456	n/a	*/
457	n/a	void file_compress(file, mode)
458	n/a	char *file;
459	n/a	char *mode;
460	n/a	{
461	n/a	local char outfile[MAX_NAME_LEN];
462	n/a	FILE *in;
463	n/a	gzFile out;
464	n/a
465	n/a	if (strlen(file) + strlen(GZ_SUFFIX) >= sizeof(outfile)) {
466	n/a	fprintf(stderr, "%s: filename too long\n", prog);
467	n/a	exit(1);
468	n/a	}
469	n/a
470	n/a	#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
471	n/a	snprintf(outfile, sizeof(outfile), "%s%s", file, GZ_SUFFIX);
472	n/a	#else
473	n/a	strcpy(outfile, file);
474	n/a	strcat(outfile, GZ_SUFFIX);
475	n/a	#endif
476	n/a
477	n/a	in = fopen(file, "rb");
478	n/a	if (in == NULL) {
479	n/a	perror(file);
480	n/a	exit(1);
481	n/a	}
482	n/a	out = gzopen(outfile, mode);
483	n/a	if (out == NULL) {
484	n/a	fprintf(stderr, "%s: can't gzopen %s\n", prog, outfile);
485	n/a	exit(1);
486	n/a	}
487	n/a	gz_compress(in, out);
488	n/a
489	n/a	unlink(file);
490	n/a	}
491	n/a
492	n/a
493	n/a	/* ===========================================================================
494	n/a	* Uncompress the given file and remove the original.
495	n/a	*/
496	n/a	void file_uncompress(file)
497	n/a	char *file;
498	n/a	{
499	n/a	local char buf[MAX_NAME_LEN];
500	n/a	char infile, outfile;
501	n/a	FILE *out;
502	n/a	gzFile in;
503	n/a	size_t len = strlen(file);
504	n/a
505	n/a	if (len + strlen(GZ_SUFFIX) >= sizeof(buf)) {
506	n/a	fprintf(stderr, "%s: filename too long\n", prog);
507	n/a	exit(1);
508	n/a	}
509	n/a
510	n/a	#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
511	n/a	snprintf(buf, sizeof(buf), "%s", file);
512	n/a	#else
513	n/a	strcpy(buf, file);
514	n/a	#endif
515	n/a
516	n/a	if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
517	n/a	infile = file;
518	n/a	outfile = buf;
519	n/a	outfile[len-3] = '\0';
520	n/a	} else {
521	n/a	outfile = file;
522	n/a	infile = buf;
523	n/a	#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
524	n/a	snprintf(buf + len, sizeof(buf) - len, "%s", GZ_SUFFIX);
525	n/a	#else
526	n/a	strcat(infile, GZ_SUFFIX);
527	n/a	#endif
528	n/a	}
529	n/a	in = gzopen(infile, "rb");
530	n/a	if (in == NULL) {
531	n/a	fprintf(stderr, "%s: can't gzopen %s\n", prog, infile);
532	n/a	exit(1);
533	n/a	}
534	n/a	out = fopen(outfile, "wb");
535	n/a	if (out == NULL) {
536	n/a	perror(file);
537	n/a	exit(1);
538	n/a	}
539	n/a
540	n/a	gz_uncompress(in, out);
541	n/a
542	n/a	unlink(infile);
543	n/a	}
544	n/a
545	n/a
546	n/a	/* ===========================================================================
547	n/a	* Usage: minigzip [-c] [-d] [-f] [-h] [-r] [-1 to -9] [files...]
548	n/a	* -c : write to standard output
549	n/a	* -d : decompress
550	n/a	* -f : compress with Z_FILTERED
551	n/a	* -h : compress with Z_HUFFMAN_ONLY
552	n/a	* -r : compress with Z_RLE
553	n/a	* -1 to -9 : compression level
554	n/a	*/
555	n/a
556	n/a	int main(argc, argv)
557	n/a	int argc;
558	n/a	char *argv[];
559	n/a	{
560	n/a	int copyout = 0;
561	n/a	int uncompr = 0;
562	n/a	gzFile file;
563	n/a	char *bname, outmode[20];
564	n/a
565	n/a	#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
566	n/a	snprintf(outmode, sizeof(outmode), "%s", "wb6 ");
567	n/a	#else
568	n/a	strcpy(outmode, "wb6 ");
569	n/a	#endif
570	n/a
571	n/a	prog = argv[0];
572	n/a	bname = strrchr(argv[0], '/');
573	n/a	if (bname)
574	n/a	bname++;
575	n/a	else
576	n/a	bname = argv[0];
577	n/a	argc--, argv++;
578	n/a
579	n/a	if (!strcmp(bname, "gunzip"))
580	n/a	uncompr = 1;
581	n/a	else if (!strcmp(bname, "zcat"))
582	n/a	copyout = uncompr = 1;
583	n/a
584	n/a	while (argc > 0) {
585	n/a	if (strcmp(*argv, "-c") == 0)
586	n/a	copyout = 1;
587	n/a	else if (strcmp(*argv, "-d") == 0)
588	n/a	uncompr = 1;
589	n/a	else if (strcmp(*argv, "-f") == 0)
590	n/a	outmode[3] = 'f';
591	n/a	else if (strcmp(*argv, "-h") == 0)
592	n/a	outmode[3] = 'h';
593	n/a	else if (strcmp(*argv, "-r") == 0)
594	n/a	outmode[3] = 'R';
595	n/a	else if ((argv)[0] == '-' && (argv)[1] >= '1' && (*argv)[1] <= '9' &&
596	n/a	(*argv)[2] == 0)
597	n/a	outmode[2] = (*argv)[1];
598	n/a	else
599	n/a	break;
600	n/a	argc--, argv++;
601	n/a	}
602	n/a	if (outmode[3] == ' ')
603	n/a	outmode[3] = 0;
604	n/a	if (argc == 0) {
605	n/a	SET_BINARY_MODE(stdin);
606	n/a	SET_BINARY_MODE(stdout);
607	n/a	if (uncompr) {
608	n/a	file = gzdopen(fileno(stdin), "rb");
609	n/a	if (file == NULL) error("can't gzdopen stdin");
610	n/a	gz_uncompress(file, stdout);
611	n/a	} else {
612	n/a	file = gzdopen(fileno(stdout), outmode);
613	n/a	if (file == NULL) error("can't gzdopen stdout");
614	n/a	gz_compress(stdin, file);
615	n/a	}
616	n/a	} else {
617	n/a	if (copyout) {
618	n/a	SET_BINARY_MODE(stdout);
619	n/a	}
620	n/a	do {
621	n/a	if (uncompr) {
622	n/a	if (copyout) {
623	n/a	file = gzopen(*argv, "rb");
624	n/a	if (file == NULL)
625	n/a	fprintf(stderr, "%s: can't gzopen %s\n", prog, *argv);
626	n/a	else
627	n/a	gz_uncompress(file, stdout);
628	n/a	} else {
629	n/a	file_uncompress(*argv);
630	n/a	}
631	n/a	} else {
632	n/a	if (copyout) {
633	n/a	FILE * in = fopen(*argv, "rb");
634	n/a
635	n/a	if (in == NULL) {
636	n/a	perror(*argv);
637	n/a	} else {
638	n/a	file = gzdopen(fileno(stdout), outmode);
639	n/a	if (file == NULL) error("can't gzdopen stdout");
640	n/a
641	n/a	gz_compress(in, file);
642	n/a	}
643	n/a
644	n/a	} else {
645	n/a	file_compress(*argv, outmode);
646	n/a	}
647	n/a	}
648	n/a	} while (argv++, --argc);
649	n/a	}
650	n/a	return 0;
651	n/a	}