GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/cmp/regular.c Lines: 26 34 76.5 %
Date: 2016-12-06 Branches: 17 26 65.4 %

Line Branch Exec Source
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/*      $OpenBSD: regular.c,v 1.12 2015/02/06 23:21:59 millert Exp $      */
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/*      $NetBSD: regular.c,v 1.2 1995/09/08 03:22:59 tls Exp $      */
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/*-
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 * Copyright (c) 1991, 1993, 1994
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/mman.h>
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#include <sys/stat.h>
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#include <err.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "extern.h"
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#define	MINIMUM(a, b)	(((a) < (b)) ? (a) : (b))
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void
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c_regular(int fd1, char *file1, off_t skip1, off_t len1,
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    int fd2, char *file2, off_t skip2, off_t len2)
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{
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	u_char ch, *p1, *p2;
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	off_t byte, length, line;
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	int dfound;
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	if (sflag && len1 != len2)
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3
		exit(1);
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	if (skip1 > len1)
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		eofmsg(file1);
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	len1 -= skip1;
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	if (skip2 > len2)
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		eofmsg(file2);
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	len2 -= skip2;
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	length = MINIMUM(len1, len2);
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	if (length > SIZE_MAX) {
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	mmap_failed:
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		c_special(fd1, file1, skip1, fd2, file2, skip2);
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		return;
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	}
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	if ((p1 = mmap(NULL, (size_t)length, PROT_READ,
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	    MAP_PRIVATE, fd1, skip1)) == MAP_FAILED)
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		goto mmap_failed;
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	if ((p2 = mmap(NULL, (size_t)length, PROT_READ,
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	    MAP_PRIVATE, fd2, skip2)) == MAP_FAILED) {
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		munmap(p1, (size_t)length);
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		goto mmap_failed;
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	}
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	if (length) {
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		madvise(p1, length, MADV_SEQUENTIAL);
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		madvise(p2, length, MADV_SEQUENTIAL);
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	}
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	dfound = 0;
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4739143
	for (byte = line = 1; length--; ++p1, ++p2, ++byte) {
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4739022
		if ((ch = *p1) != *p2) {
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2
			if (lflag) {
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				dfound = 1;
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				(void)printf("%6lld %3o %3o\n", (long long)byte,
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				    ch, *p2);
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			} else
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2
				diffmsg(file1, file2, byte, line);
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				/* NOTREACHED */
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		}
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4739020
		if (ch == '\n')
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231158
			++line;
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	}
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	if (len1 != len2)
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		eofmsg (len1 > len2 ? file2 : file1);
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	if (dfound)
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		exit(DIFF_EXIT);
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}