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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/grep/file.c	Lines:	37	76	48.7 %
Date:	2016-12-06	Branches:	14	44	31.8 %


/*	$OpenBSD: file.c,v 1.13 2015/03/16 13:27:59 millert Exp $	*/

/*-
 * Copyright (c) 1999 James Howard and Dag-Erling Co�dan Sm�rgrav
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <zlib.h>

#include "grep.h"

static char	 fname[PATH_MAX];
#ifndef NOZ
static char	*lnbuf;
static size_t	 lnbuflen;
#endif

#define FILE_STDIO	0
#define FILE_MMAP	1
#define FILE_GZIP	2

struct file {
	int	 type;
	int	 noseek;
	FILE	*f;
	mmf_t	*mmf;
	gzFile	*gzf;
};

#ifndef NOZ
static char *
gzfgetln(gzFile *f, size_t *len)
{
	size_t		n;
	int		c;

	for (n = 0; ; ++n) {
		c = gzgetc(f);
		if (c == -1) {
			const char *gzerrstr;
			int gzerr;

			if (gzeof(f))
				break;

			gzerrstr = gzerror(f, &gzerr);
			if (gzerr == Z_ERRNO)
				err(2, "%s", fname);
			else
				errx(2, "%s: %s", fname, gzerrstr);
		}
		if (n >= lnbuflen) {
			lnbuflen *= 2;
			lnbuf = grep_realloc(lnbuf, ++lnbuflen);
		}
		if (c == '\n')
			break;
		lnbuf[n] = c;
	}

	if (gzeof(f) && n == 0)
		return NULL;
	*len = n;
	return lnbuf;
}
#endif

file_t *
grep_fdopen(int fd, char *mode)
{
	file_t *f;

	if (fd == STDIN_FILENO)
		snprintf(fname, sizeof fname, "(standard input)");
	else
		snprintf(fname, sizeof fname, "(fd %d)", fd);

	f = grep_malloc(sizeof *f);

#ifndef NOZ
	if (Zflag) {
		f->type = FILE_GZIP;
		f->noseek = lseek(fd, 0L, SEEK_SET) == -1;
		if ((f->gzf = gzdopen(fd, mode)) != NULL)
			return f;
	} else
#endif
	{
		f->type = FILE_STDIO;
		f->noseek = isatty(fd);
		if ((f->f = fdopen(fd, mode)) != NULL)
			return f;
	}

	free(f);
	return NULL;
}

file_t *
grep_open(char *path, char *mode)
{
	file_t *f;

	snprintf(fname, sizeof fname, "%s", path);

	f = grep_malloc(sizeof *f);
	f->noseek = 0;

#ifndef NOZ
	if (Zflag) {
		f->type = FILE_GZIP;
		if ((f->gzf = gzopen(fname, mode)) != NULL)
			return f;
	} else
#endif
	{
#ifndef SMALL
		/* try mmap first; if it fails, try stdio */
		if ((f->mmf = mmopen(fname, mode)) != NULL) {
			f->type = FILE_MMAP;
			return f;
		}
#endif
		f->type = FILE_STDIO;
		if ((f->f = fopen(path, mode)) != NULL)
			return f;
	}

	free(f);
	return NULL;
}

int
grep_bin_file(file_t *f)
{
	if (f->noseek)
		return 0;

	switch (f->type) {
	case FILE_STDIO:
		return bin_file(f->f);
#ifndef SMALL
	case FILE_MMAP:
		return mmbin_file(f->mmf);
#endif
#ifndef NOZ
	case FILE_GZIP:
		return gzbin_file(f->gzf);
#endif
	default:
		/* can't happen */
		errx(2, "invalid file type");
	}
}

char *
grep_fgetln(file_t *f, size_t *l)
{
	switch (f->type) {
	case FILE_STDIO:
		return fgetln(f->f, l);
#ifndef SMALL
	case FILE_MMAP:
		return mmfgetln(f->mmf, l);
#endif
#ifndef NOZ
	case FILE_GZIP:
		return gzfgetln(f->gzf, l);
#endif
	default:
		/* can't happen */
		errx(2, "invalid file type");
	}
}

void
grep_close(file_t *f)
{
	switch (f->type) {
	case FILE_STDIO:
		fclose(f->f);
		break;
#ifndef SMALL
	case FILE_MMAP:
		mmclose(f->mmf);
		break;
#endif
#ifndef NOZ
	case FILE_GZIP:
		gzclose(f->gzf);
		break;
#endif
	default:
		/* can't happen */
		errx(2, "invalid file type");
	}
	free(f);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/* $OpenBSD: file.c,v 1.13 2015/03/16 13:27:59 millert Exp $ */
2
3			/*-
4			* Copyright (c) 1999 James Howard and Dag-Erling Co�dan Sm�rgrav
5			* All rights reserved.
6			*
7			* Redistribution and use in source and binary forms, with or without
8			* modification, are permitted provided that the following conditions
9			* are met:
10			* 1. Redistributions of source code must retain the above copyright
11			* notice, this list of conditions and the following disclaimer.
12			* 2. Redistributions in binary form must reproduce the above copyright
13			* notice, this list of conditions and the following disclaimer in the
14			* documentation and/or other materials provided with the distribution.
15			*
16			* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17			* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18			* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19			* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20			* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21			* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22			* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23			* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26			* SUCH DAMAGE.
27			*/
28
29			#include <err.h>
30			#include <stdio.h>
31			#include <stdlib.h>
32			#include <zlib.h>
33
34			#include "grep.h"
35
36			static char fname[PATH_MAX];
37			#ifndef NOZ
38			static char *lnbuf;
39			static size_t lnbuflen;
40			#endif
41
42			#define FILE_STDIO 0
43			#define FILE_MMAP 1
44			#define FILE_GZIP 2
45
46			struct file {
47			int type;
48			int noseek;
49			FILE *f;
50			mmf_t *mmf;
51			gzFile *gzf;
52			};
53
54			#ifndef NOZ
55			static char *
56			gzfgetln(gzFile f, size_t len)
57			{
58			size_t n;
59			int c;
60
61			for (n = 0; ; ++n) {
62			c = gzgetc(f);
63			if (c == -1) {
64			const char *gzerrstr;
65			int gzerr;
66
67			if (gzeof(f))
68			break;
69
70			gzerrstr = gzerror(f, &gzerr);
71			if (gzerr == Z_ERRNO)
72			err(2, "%s", fname);
73			else
74			errx(2, "%s: %s", fname, gzerrstr);
75			}
76			if (n >= lnbuflen) {
77			lnbuflen *= 2;
78			lnbuf = grep_realloc(lnbuf, ++lnbuflen);
79			}
80			if (c == '\n')
81			break;
82			lnbuf[n] = c;
83			}
84
85			if (gzeof(f) && n == 0)
86			return NULL;
87			*len = n;
88			return lnbuf;
89			}
90			#endif
91
92			file_t *
93			grep_fdopen(int fd, char *mode)
94		82	{
95			file_t *f;
96
97	✓✗	82	if (fd == STDIN_FILENO)
98		82	snprintf(fname, sizeof fname, "(standard input)");
99			else
100			snprintf(fname, sizeof fname, "(fd %d)", fd);
101
102		82	f = grep_malloc(sizeof *f);
103
104			#ifndef NOZ
105	✗✓	82	if (Zflag) {
106			f->type = FILE_GZIP;
107			f->noseek = lseek(fd, 0L, SEEK_SET) == -1;
108			if ((f->gzf = gzdopen(fd, mode)) != NULL)
109			return f;
110			} else
111			#endif
112			{
113		82	f->type = FILE_STDIO;
114		82	f->noseek = isatty(fd);
115	✓✗	82	if ((f->f = fdopen(fd, mode)) != NULL)
116		82	return f;
117			}
118
119			free(f);
120			return NULL;
121			}
122
123			file_t *
124			grep_open(char path, char mode)
125		267	{
126			file_t *f;
127
128		267	snprintf(fname, sizeof fname, "%s", path);
129
130		267	f = grep_malloc(sizeof *f);
131		267	f->noseek = 0;
132
133			#ifndef NOZ
134	✗✓	267	if (Zflag) {
135			f->type = FILE_GZIP;
136			if ((f->gzf = gzopen(fname, mode)) != NULL)
137			return f;
138			} else
139			#endif
140			{
141			#ifndef SMALL
142			/* try mmap first; if it fails, try stdio */
143	✓✓	267	if ((f->mmf = mmopen(fname, mode)) != NULL) {
144		266	f->type = FILE_MMAP;
145		266	return f;
146			}
147			#endif
148		1	f->type = FILE_STDIO;
149	✓✗	1	if ((f->f = fopen(path, mode)) != NULL)
150		1	return f;
151			}
152
153			free(f);
154			return NULL;
155			}
156
157			int
158			grep_bin_file(file_t *f)
159		349	{
160	✗✓	349	if (f->noseek)
161			return 0;
162
163	✓✓✗✗	349	switch (f->type) {
164			case FILE_STDIO:
165		83	return bin_file(f->f);
166			#ifndef SMALL
167			case FILE_MMAP:
168		266	return mmbin_file(f->mmf);
169			#endif
170			#ifndef NOZ
171			case FILE_GZIP:
172			return gzbin_file(f->gzf);
173			#endif
174			default:
175			/* can't happen */
176			errx(2, "invalid file type");
177			}
178			}
179
180			char *
181			grep_fgetln(file_t f, size_t l)
182		21322	{
183	✓✓✗✗	21322	switch (f->type) {
184			case FILE_STDIO:
185		18697	return fgetln(f->f, l);
186			#ifndef SMALL
187			case FILE_MMAP:
188		2625	return mmfgetln(f->mmf, l);
189			#endif
190			#ifndef NOZ
191			case FILE_GZIP:
192			return gzfgetln(f->gzf, l);
193			#endif
194			default:
195			/* can't happen */
196			errx(2, "invalid file type");
197			}
198			}
199
200			void
201			grep_close(file_t *f)
202		349	{
203	✓✓✗✗	349	switch (f->type) {
204			case FILE_STDIO:
205		83	fclose(f->f);
206		83	break;
207			#ifndef SMALL
208			case FILE_MMAP:
209		266	mmclose(f->mmf);
210		266	break;
211			#endif
212			#ifndef NOZ
213			case FILE_GZIP:
214			gzclose(f->gzf);
215			break;
216			#endif
217			default:
218			/* can't happen */
219			errx(2, "invalid file type");
220			}
221		349	free(f);
222		349	}