diff options
Diffstat (limited to 'usr.bin/cmp/regular.c')
| -rw-r--r-- | usr.bin/cmp/regular.c | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/usr.bin/cmp/regular.c b/usr.bin/cmp/regular.c new file mode 100644 index 0000000..35f62d1 --- /dev/null +++ b/usr.bin/cmp/regular.c @@ -0,0 +1,98 @@ +/*- + * Copyright (c) 1991, 1993, 1994 + * The Regents of the University of California. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)regular.c 8.3 (Berkeley) 4/2/94"; +#endif /* not lint */ + +#include <sys/param.h> +#include <sys/mman.h> +#include <sys/stat.h> + +#include <err.h> +#include <limits.h> +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "extern.h" + +void +c_regular(fd1, file1, skip1, len1, fd2, file2, skip2, len2) + int fd1, fd2; + char *file1, *file2; + off_t skip1, len1, skip2, len2; +{ + u_char ch, *p1, *p2; + off_t byte, length, line; + int dfound; + + if (sflag && len1 != len2) + exit(1); + + if (skip1 > len1) + eofmsg(file1); + len1 -= skip1; + if (skip2 > len2) + eofmsg(file2); + len2 -= skip2; + + length = MIN(len1, len2); + if (length > SIZE_T_MAX) + return (c_special(fd1, file1, skip1, fd2, file2, skip2)); + + if ((p1 = (u_char *)mmap(NULL, + (size_t)length, PROT_READ, 0, fd1, skip1)) == (u_char *)-1) + err(ERR_EXIT, "%s", file1); + if ((p2 = (u_char *)mmap(NULL, + (size_t)length, PROT_READ, 0, fd2, skip2)) == (u_char *)-1) + err(ERR_EXIT, "%s", file2); + + dfound = 0; + for (byte = line = 1; length--; ++p1, ++p2, ++byte) { + if ((ch = *p1) != *p2) + if (lflag) { + dfound = 1; + (void)printf("%6qd %3o %3o\n", byte, ch, *p2); + } else + diffmsg(file1, file2, byte, line); + /* NOTREACHED */ + if (ch == '\n') + ++line; + } + + if (len1 != len2) + eofmsg (len1 > len2 ? file2 : file1); + if (dfound) + exit(DIFF_EXIT); +} |
