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Annotation of src/usr.bin/cmp/special.c, Revision 1.4

1.4     ! deraadt     1: /*      $OpenBSD: special.c,v 1.3 1999/08/03 16:02:44 mickey Exp $      */
1.1       deraadt     2: /*      $NetBSD: special.c,v 1.2 1995/09/08 03:23:00 tls Exp $      */
                      3:
                      4: /*-
                      5:  * Copyright (c) 1991, 1993, 1994
                      6:  *     The Regents of the University of California.  All rights reserved.
                      7:  *
                      8:  * Redistribution and use in source and binary forms, with or without
                      9:  * modification, are permitted provided that the following conditions
                     10:  * are met:
                     11:  * 1. Redistributions of source code must retain the above copyright
                     12:  *    notice, this list of conditions and the following disclaimer.
                     13:  * 2. Redistributions in binary form must reproduce the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer in the
                     15:  *    documentation and/or other materials provided with the distribution.
                     16:  * 3. All advertising materials mentioning features or use of this software
                     17:  *    must display the following acknowledgement:
                     18:  *     This product includes software developed by the University of
                     19:  *     California, Berkeley and its contributors.
                     20:  * 4. Neither the name of the University nor the names of its contributors
                     21:  *    may be used to endorse or promote products derived from this software
                     22:  *    without specific prior written permission.
                     23:  *
                     24:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     25:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     26:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     27:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     28:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     29:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     30:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     31:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     32:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     33:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     34:  * SUCH DAMAGE.
                     35:  */
                     36:
                     37: #ifndef lint
                     38: #if 0
                     39: static char sccsid[] = "@(#)special.c  8.3 (Berkeley) 4/2/94";
                     40: #else
1.4     ! deraadt    41: static char rcsid[] = "$OpenBSD: special.c,v 1.3 1999/08/03 16:02:44 mickey Exp $";
1.1       deraadt    42: #endif
                     43: #endif /* not lint */
                     44:
                     45: #include <sys/types.h>
                     46:
                     47: #include <err.h>
                     48: #include <stdlib.h>
                     49: #include <stdio.h>
                     50: #include <string.h>
                     51:
                     52: #include "extern.h"
                     53:
                     54: void
                     55: c_special(fd1, file1, skip1, fd2, file2, skip2)
                     56:        int fd1, fd2;
                     57:        char *file1, *file2;
                     58:        off_t skip1, skip2;
                     59: {
                     60:        int ch1, ch2;
                     61:        off_t byte, line;
                     62:        FILE *fp1, *fp2;
                     63:        int dfound;
                     64:
                     65:        if ((fp1 = fdopen(fd1, "r")) == NULL)
                     66:                err(ERR_EXIT, "%s", file1);
                     67:        if ((fp2 = fdopen(fd2, "r")) == NULL)
                     68:                err(ERR_EXIT, "%s", file2);
                     69:
1.3       mickey     70:        dfound = 0;
1.1       deraadt    71:        while (skip1--)
                     72:                if (getc(fp1) == EOF)
                     73:                        goto eof;
                     74:        while (skip2--)
                     75:                if (getc(fp2) == EOF)
                     76:                        goto eof;
                     77:
                     78:        for (byte = line = 1;; ++byte) {
                     79:                ch1 = getc(fp1);
                     80:                ch2 = getc(fp2);
                     81:                if (ch1 == EOF || ch2 == EOF)
                     82:                        break;
1.3       mickey     83:                if (ch1 != ch2) {
1.1       deraadt    84:                        if (lflag) {
                     85:                                dfound = 1;
1.4     ! deraadt    86:                                (void)printf("%6lld %3o %3o\n", (long long)byte,
        !            87:                                    ch1, ch2);
1.1       deraadt    88:                        } else
                     89:                                diffmsg(file1, file2, byte, line);
                     90:                                /* NOTREACHED */
1.3       mickey     91:                }
1.1       deraadt    92:                if (ch1 == '\n')
                     93:                        ++line;
                     94:        }
                     95:
                     96: eof:   if (ferror(fp1))
                     97:                err(ERR_EXIT, "%s", file1);
                     98:        if (ferror(fp2))
                     99:                err(ERR_EXIT, "%s", file2);
                    100:        if (feof(fp1)) {
                    101:                if (!feof(fp2))
                    102:                        eofmsg(file1);
                    103:        } else
                    104:                if (feof(fp2))
                    105:                        eofmsg(file2);
                    106:        if (dfound)
                    107:                exit(DIFF_EXIT);
                    108: }