1d023313eSbostic /*- 2d023313eSbostic * Copyright (c) 1991 The Regents of the University of California. 3d023313eSbostic * All rights reserved. 4d023313eSbostic * 5d023313eSbostic * %sccs.include.redist.c% 6d023313eSbostic */ 7d023313eSbostic 8d023313eSbostic #ifndef lint 9*3994124cSbostic static char sccsid[] = "@(#)regular.c 5.2 (Berkeley) 11/16/91"; 10d023313eSbostic #endif /* not lint */ 11d023313eSbostic 12d023313eSbostic #include <sys/param.h> 13d023313eSbostic #include <sys/mman.h> 14d023313eSbostic #include <sys/stat.h> 15d023313eSbostic #include <errno.h> 16d023313eSbostic #include <stdlib.h> 17d023313eSbostic #include <stdio.h> 18d023313eSbostic #include <string.h> 19d023313eSbostic #include "extern.h" 20d023313eSbostic 21d023313eSbostic void 22d023313eSbostic c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) 23d023313eSbostic int fd1, fd2; 24d023313eSbostic char *file1, *file2; 25d023313eSbostic off_t skip1, len1, skip2, len2; 26d023313eSbostic { 27d023313eSbostic register u_char ch, *p1, *p2; 28d023313eSbostic register off_t byte, length, line; 29d023313eSbostic int dfound; 30d023313eSbostic 31d023313eSbostic if (sflag && len1 != len2) 32d023313eSbostic exit(1); 33d023313eSbostic 34*3994124cSbostic if (skip1 > len1) 35d023313eSbostic eofmsg(file1); 36d023313eSbostic len1 -= skip1; 37*3994124cSbostic if (skip2 > len2) 38d023313eSbostic eofmsg(file2); 39d023313eSbostic len2 -= skip2; 40d023313eSbostic 41d023313eSbostic length = MIN(len1, len2); 42d023313eSbostic if ((p1 = (u_char *)mmap(NULL, 43d023313eSbostic length, PROT_READ, MAP_FILE, fd1, skip1)) == (u_char *)-1) 44d023313eSbostic err("%s: %s", file1, strerror(errno)); 45d023313eSbostic if ((p2 = (u_char *)mmap(NULL, 46d023313eSbostic length, PROT_READ, MAP_FILE, fd2, skip2)) == (u_char *)-1) 47d023313eSbostic err("%s: %s", file2, strerror(errno)); 48d023313eSbostic 49d023313eSbostic dfound = 0; 50d023313eSbostic for (byte = line = 1; length--; ++p1, ++p2, ++byte) { 51d023313eSbostic if ((ch = *p1) != *p2) 52d023313eSbostic if (lflag) { 53d023313eSbostic dfound = 1; 54d023313eSbostic (void)printf("%6ld %3o %3o\n", byte, ch, *p2); 55d023313eSbostic } else 56d023313eSbostic diffmsg(file1, file2, byte, line); 57d023313eSbostic /* NOTREACHED */ 58d023313eSbostic if (ch == '\n') 59d023313eSbostic ++line; 60d023313eSbostic } 61d023313eSbostic 62d023313eSbostic if (len1 != len2) 63d023313eSbostic eofmsg (len1 > len2 ? file2 : file1); 64d023313eSbostic if (dfound) 65d023313eSbostic exit(1); 66d023313eSbostic } 67