151413Sbostic /*- 251413Sbostic * Copyright (c) 1991 The Regents of the University of California. 351413Sbostic * All rights reserved. 451413Sbostic * 551413Sbostic * %sccs.include.redist.c% 651413Sbostic */ 751413Sbostic 851413Sbostic #ifndef lint 9*54364Sbostic static char sccsid[] = "@(#)regular.c 5.5 (Berkeley) 06/24/92"; 1051413Sbostic #endif /* not lint */ 1151413Sbostic 1251413Sbostic #include <sys/param.h> 1351413Sbostic #include <sys/mman.h> 1451413Sbostic #include <sys/stat.h> 15*54364Sbostic 16*54364Sbostic #include <limits.h> 1751413Sbostic #include <errno.h> 1851413Sbostic #include <stdlib.h> 1951413Sbostic #include <stdio.h> 2051413Sbostic #include <string.h> 2151413Sbostic #include "extern.h" 2251413Sbostic 2351413Sbostic void 2451413Sbostic c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) 2551413Sbostic int fd1, fd2; 2651413Sbostic char *file1, *file2; 2751413Sbostic off_t skip1, len1, skip2, len2; 2851413Sbostic { 2951413Sbostic register u_char ch, *p1, *p2; 3051413Sbostic register off_t byte, length, line; 3151413Sbostic int dfound; 3251413Sbostic 3351413Sbostic if (sflag && len1 != len2) 3451413Sbostic exit(1); 3551413Sbostic 3651733Sbostic if (skip1 > len1) 3751413Sbostic eofmsg(file1); 3851413Sbostic len1 -= skip1; 3951733Sbostic if (skip2 > len2) 4051413Sbostic eofmsg(file2); 4151413Sbostic len2 -= skip2; 4251413Sbostic 4351413Sbostic length = MIN(len1, len2); 44*54364Sbostic if (length > SIZE_T_MAX) 45*54364Sbostic return (c_special(fd1, file1, skip1, fd2, file2, skip2)); 46*54364Sbostic 4751413Sbostic if ((p1 = (u_char *)mmap(NULL, 48*54364Sbostic (size_t)length, PROT_READ, 0, fd1, skip1)) == (u_char *)-1) 4951413Sbostic err("%s: %s", file1, strerror(errno)); 5051413Sbostic if ((p2 = (u_char *)mmap(NULL, 51*54364Sbostic (size_t)length, PROT_READ, 0, fd2, skip2)) == (u_char *)-1) 5251413Sbostic err("%s: %s", file2, strerror(errno)); 5351413Sbostic 5451413Sbostic dfound = 0; 5551413Sbostic for (byte = line = 1; length--; ++p1, ++p2, ++byte) { 5651413Sbostic if ((ch = *p1) != *p2) 5751413Sbostic if (lflag) { 5851413Sbostic dfound = 1; 5954187Sbostic (void)printf("%6qd %3o %3o\n", byte, ch, *p2); 6051413Sbostic } else 6151413Sbostic diffmsg(file1, file2, byte, line); 6251413Sbostic /* NOTREACHED */ 6351413Sbostic if (ch == '\n') 6451413Sbostic ++line; 6551413Sbostic } 6651413Sbostic 6751413Sbostic if (len1 != len2) 6851413Sbostic eofmsg (len1 > len2 ? file2 : file1); 6951413Sbostic if (dfound) 7051413Sbostic exit(1); 7151413Sbostic } 72