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Annotation of src/usr.bin/vis/foldit.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: foldit.c,v 1.4 1994/12/20 16:13:02 jtc Exp $   */
        !             2:
        !             3: /*-
        !             4:  * Copyright (c) 1990, 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: #if 0
        !            38: static char sccsid[] = "@(#)foldit.c   8.1 (Berkeley) 6/6/93";
        !            39: #endif
        !            40: static char rcsid[] = "$NetBSD: foldit.c,v 1.4 1994/12/20 16:13:02 jtc Exp $";
        !            41: #endif /* not lint */
        !            42:
        !            43: #include <stdio.h>
        !            44:
        !            45: int
        !            46: foldit(chunk, col, max)
        !            47:        char *chunk;
        !            48:        int col, max;
        !            49: {
        !            50:        register char *cp;
        !            51:
        !            52:        /*
        !            53:         * Keep track of column position. Insert hidden newline
        !            54:         * if this chunk puts us over the limit.
        !            55:         */
        !            56: again:
        !            57:        cp = chunk;
        !            58:        while (*cp) {
        !            59:                switch(*cp) {
        !            60:                case '\n':
        !            61:                case '\r':
        !            62:                        col = 0;
        !            63:                        break;
        !            64:                case '\t':
        !            65:                        col = col + 8 &~ 07;
        !            66:                        break;
        !            67:                case '\b':
        !            68:                        col = col ? col - 1 : 0;
        !            69:                        break;
        !            70:                default:
        !            71:                        col++;
        !            72:                }
        !            73:                if (col > (max - 2)) {
        !            74:                        printf("\\\n");
        !            75:                        col = 0;
        !            76:                        goto again;
        !            77:                }
        !            78:                cp++;
        !            79:        }
        !            80:        return (col);
        !            81: }