1 /* $NetBSD: regular.c,v 1.2 1995/09/08 03:22:59 tls Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993, 1994 5 * The Regents of the University of California. 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 * 3. All advertising materials mentioning features or use of this software 16 * must display the following acknowledgement: 17 * This product includes software developed by the University of 18 * California, Berkeley and its contributors. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)regular.c 8.3 (Berkeley) 4/2/94"; 39 #else 40 static char rcsid[] = "$NetBSD: regular.c,v 1.2 1995/09/08 03:22:59 tls Exp $"; 41 #endif 42 #endif /* not lint */ 43 44 #include <sys/param.h> 45 #include <sys/mman.h> 46 #include <sys/stat.h> 47 48 #include <err.h> 49 #include <limits.h> 50 #include <stdlib.h> 51 #include <stdio.h> 52 #include <string.h> 53 54 #include "extern.h" 55 56 void 57 c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) 58 int fd1, fd2; 59 char *file1, *file2; 60 off_t skip1, len1, skip2, len2; 61 { 62 u_char ch, *p1, *p2; 63 off_t byte, length, line; 64 int dfound; 65 66 if (sflag && len1 != len2) 67 exit(1); 68 69 if (skip1 > len1) 70 eofmsg(file1); 71 len1 -= skip1; 72 if (skip2 > len2) 73 eofmsg(file2); 74 len2 -= skip2; 75 76 length = MIN(len1, len2); 77 if (length > SIZE_T_MAX) 78 return (c_special(fd1, file1, skip1, fd2, file2, skip2)); 79 80 if ((p1 = (u_char *)mmap(NULL, 81 (size_t)length, PROT_READ, 0, fd1, skip1)) == (u_char *)-1) 82 err(ERR_EXIT, "%s", file1); 83 if ((p2 = (u_char *)mmap(NULL, 84 (size_t)length, PROT_READ, 0, fd2, skip2)) == (u_char *)-1) 85 err(ERR_EXIT, "%s", file2); 86 87 dfound = 0; 88 for (byte = line = 1; length--; ++p1, ++p2, ++byte) { 89 if ((ch = *p1) != *p2) 90 if (lflag) { 91 dfound = 1; 92 (void)printf("%6qd %3o %3o\n", byte, ch, *p2); 93 } else 94 diffmsg(file1, file2, byte, line); 95 /* NOTREACHED */ 96 if (ch == '\n') 97 ++line; 98 } 99 100 if (len1 != len2) 101 eofmsg (len1 > len2 ? file2 : file1); 102 if (dfound) 103 exit(DIFF_EXIT); 104 } 105