1*51413Sbostic /*- 2*51413Sbostic * Copyright (c) 1991 The Regents of the University of California. 3*51413Sbostic * All rights reserved. 4*51413Sbostic * 5*51413Sbostic * %sccs.include.redist.c% 6*51413Sbostic */ 7*51413Sbostic 8*51413Sbostic #ifndef lint 9*51413Sbostic static char sccsid[] = "@(#)regular.c 5.1 (Berkeley) 10/27/91"; 10*51413Sbostic #endif /* not lint */ 11*51413Sbostic 12*51413Sbostic #include <sys/param.h> 13*51413Sbostic #include <sys/mman.h> 14*51413Sbostic #include <sys/stat.h> 15*51413Sbostic #include <errno.h> 16*51413Sbostic #include <stdlib.h> 17*51413Sbostic #include <stdio.h> 18*51413Sbostic #include <string.h> 19*51413Sbostic #include "extern.h" 20*51413Sbostic 21*51413Sbostic void 22*51413Sbostic c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) 23*51413Sbostic int fd1, fd2; 24*51413Sbostic char *file1, *file2; 25*51413Sbostic off_t skip1, len1, skip2, len2; 26*51413Sbostic { 27*51413Sbostic register u_char ch, *p1, *p2; 28*51413Sbostic register off_t byte, length, line; 29*51413Sbostic int dfound; 30*51413Sbostic 31*51413Sbostic if (sflag && len1 != len2) 32*51413Sbostic exit(1); 33*51413Sbostic 34*51413Sbostic if (skip1 >= len1) 35*51413Sbostic eofmsg(file1); 36*51413Sbostic len1 -= skip1; 37*51413Sbostic if (skip2 >= len2) 38*51413Sbostic eofmsg(file2); 39*51413Sbostic len2 -= skip2; 40*51413Sbostic 41*51413Sbostic length = MIN(len1, len2); 42*51413Sbostic if ((p1 = (u_char *)mmap(NULL, 43*51413Sbostic length, PROT_READ, MAP_FILE, fd1, skip1)) == (u_char *)-1) 44*51413Sbostic err("%s: %s", file1, strerror(errno)); 45*51413Sbostic if ((p2 = (u_char *)mmap(NULL, 46*51413Sbostic length, PROT_READ, MAP_FILE, fd2, skip2)) == (u_char *)-1) 47*51413Sbostic err("%s: %s", file2, strerror(errno)); 48*51413Sbostic 49*51413Sbostic dfound = 0; 50*51413Sbostic for (byte = line = 1; length--; ++p1, ++p2, ++byte) { 51*51413Sbostic if ((ch = *p1) != *p2) 52*51413Sbostic if (lflag) { 53*51413Sbostic dfound = 1; 54*51413Sbostic (void)printf("%6ld %3o %3o\n", byte, ch, *p2); 55*51413Sbostic } else 56*51413Sbostic diffmsg(file1, file2, byte, line); 57*51413Sbostic /* NOTREACHED */ 58*51413Sbostic if (ch == '\n') 59*51413Sbostic ++line; 60*51413Sbostic } 61*51413Sbostic 62*51413Sbostic if (len1 != len2) 63*51413Sbostic eofmsg (len1 > len2 ? file2 : file1); 64*51413Sbostic if (dfound) 65*51413Sbostic exit(1); 66*51413Sbostic } 67