Annotation of src/usr.bin/vis/vis.c, Revision 1.1
1.1 ! deraadt 1: /* $NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $ */
! 2:
! 3: /*-
! 4: * Copyright (c) 1989, 1993
! 5: * The Regents of the University of California. All rights reserved.
! 6: *
! 7: * Redistribution and use in source and binary forms, with or without
! 8: * modification, are permitted provided that the following conditions
! 9: * are met:
! 10: * 1. Redistributions of source code must retain the above copyright
! 11: * notice, this list of conditions and the following disclaimer.
! 12: * 2. Redistributions in binary form must reproduce the above copyright
! 13: * notice, this list of conditions and the following disclaimer in the
! 14: * documentation and/or other materials provided with the distribution.
! 15: * 3. All advertising materials mentioning features or use of this software
! 16: * must display the following acknowledgement:
! 17: * This product includes software developed by the University of
! 18: * California, Berkeley and its contributors.
! 19: * 4. Neither the name of the University nor the names of its contributors
! 20: * may be used to endorse or promote products derived from this software
! 21: * without specific prior written permission.
! 22: *
! 23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
! 24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
! 27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 33: * SUCH DAMAGE.
! 34: */
! 35:
! 36: #ifndef lint
! 37: static char copyright[] =
! 38: "@(#) Copyright (c) 1989, 1993\n\
! 39: The Regents of the University of California. All rights reserved.\n";
! 40: #endif /* not lint */
! 41:
! 42: #ifndef lint
! 43: #if 0
! 44: static char sccsid[] = "@(#)vis.c 8.1 (Berkeley) 6/6/93";
! 45: #endif
! 46: static char rcsid[] = "$NetBSD: vis.c,v 1.4 1994/12/20 16:13:03 jtc Exp $";
! 47: #endif /* not lint */
! 48:
! 49: #include <stdio.h>
! 50: #include <string.h>
! 51: #include <stdlib.h>
! 52: #include <unistd.h>
! 53: #include <err.h>
! 54: #include <vis.h>
! 55:
! 56: int eflags, fold, foldwidth=80, none, markeol, debug;
! 57:
! 58: int foldit __P((char *, int, int));
! 59: void process __P((FILE *, char *));
! 60:
! 61: int
! 62: main(argc, argv)
! 63: int argc;
! 64: char *argv[];
! 65: {
! 66: FILE *fp;
! 67: int ch;
! 68:
! 69: while ((ch = getopt(argc, argv, "nwctsobfF:ld")) != EOF)
! 70: switch((char)ch) {
! 71: case 'n':
! 72: none++;
! 73: break;
! 74: case 'w':
! 75: eflags |= VIS_WHITE;
! 76: break;
! 77: case 'c':
! 78: eflags |= VIS_CSTYLE;
! 79: break;
! 80: case 't':
! 81: eflags |= VIS_TAB;
! 82: break;
! 83: case 's':
! 84: eflags |= VIS_SAFE;
! 85: break;
! 86: case 'o':
! 87: eflags |= VIS_OCTAL;
! 88: break;
! 89: case 'b':
! 90: eflags |= VIS_NOSLASH;
! 91: break;
! 92: case 'F':
! 93: if ((foldwidth = atoi(optarg))<5) {
! 94: errx(1, "can't fold lines to less than 5 cols");
! 95: /* NOTREACHED */
! 96: }
! 97: /*FALLTHROUGH*/
! 98: case 'f':
! 99: fold++; /* fold output lines to 80 cols */
! 100: break; /* using hidden newline */
! 101: case 'l':
! 102: markeol++; /* mark end of line with \$ */
! 103: break;
! 104: #ifdef DEBUG
! 105: case 'd':
! 106: debug++;
! 107: break;
! 108: #endif
! 109: case '?':
! 110: default:
! 111: fprintf(stderr,
! 112: "usage: vis [-nwctsobf] [-F foldwidth]\n");
! 113: exit(1);
! 114: }
! 115: argc -= optind;
! 116: argv += optind;
! 117:
! 118: if (*argv)
! 119: while (*argv) {
! 120: if ((fp=fopen(*argv, "r")) != NULL)
! 121: process(fp, *argv);
! 122: else
! 123: warn("%s", *argv);
! 124: argv++;
! 125: }
! 126: else
! 127: process(stdin, "<stdin>");
! 128: exit(0);
! 129: }
! 130:
! 131: void
! 132: process(fp, filename)
! 133: FILE *fp;
! 134: char *filename;
! 135: {
! 136: static int col = 0;
! 137: register char *cp = "\0"+1; /* so *(cp-1) starts out != '\n' */
! 138: register int c, rachar;
! 139: char buff[5];
! 140:
! 141: c = getc(fp);
! 142: while (c != EOF) {
! 143: rachar = getc(fp);
! 144: if (none) {
! 145: cp = buff;
! 146: *cp++ = c;
! 147: if (c == '\\')
! 148: *cp++ = '\\';
! 149: *cp = '\0';
! 150: } else if (markeol && c == '\n') {
! 151: cp = buff;
! 152: if ((eflags & VIS_NOSLASH) == 0)
! 153: *cp++ = '\\';
! 154: *cp++ = '$';
! 155: *cp++ = '\n';
! 156: *cp = '\0';
! 157: } else
! 158: (void) vis(buff, (char)c, eflags, (char)rachar);
! 159:
! 160: cp = buff;
! 161: if (fold) {
! 162: #ifdef DEBUG
! 163: if (debug)
! 164: printf("<%02d,", col);
! 165: #endif
! 166: col = foldit(cp, col, foldwidth);
! 167: #ifdef DEBUG
! 168: if (debug)
! 169: printf("%02d>", col);
! 170: #endif
! 171: }
! 172: do {
! 173: putchar(*cp);
! 174: } while (*++cp);
! 175: c = rachar;
! 176: }
! 177: /*
! 178: * terminate partial line with a hidden newline
! 179: */
! 180: if (fold && *(cp-1) != '\n')
! 181: printf("\\\n");
! 182: }
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