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Annotation of src/usr.bin/window/wwgets.c, Revision 1.1

1.1     ! deraadt     1: /*     $NetBSD: wwgets.c,v 1.5 1995/09/29 00:44:10 cgd Exp $   */
        !             2:
        !             3: /*
        !             4:  * Copyright (c) 1983, 1993
        !             5:  *     The Regents of the University of California.  All rights reserved.
        !             6:  *
        !             7:  * This code is derived from software contributed to Berkeley by
        !             8:  * Edward Wang at The University of California, Berkeley.
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by the University of
        !            21:  *     California, Berkeley and its contributors.
        !            22:  * 4. Neither the name of the University nor the names of its contributors
        !            23:  *    may be used to endorse or promote products derived from this software
        !            24:  *    without specific prior written permission.
        !            25:  *
        !            26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            36:  * SUCH DAMAGE.
        !            37:  */
        !            38:
        !            39: #ifndef lint
        !            40: #if 0
        !            41: static char sccsid[] = "@(#)wwgets.c   8.1 (Berkeley) 6/6/93";
        !            42: #else
        !            43: static char rcsid[] = "$NetBSD: wwgets.c,v 1.5 1995/09/29 00:44:10 cgd Exp $";
        !            44: #endif
        !            45: #endif /* not lint */
        !            46:
        !            47: #include "ww.h"
        !            48: #include "char.h"
        !            49: #include <string.h>
        !            50:
        !            51: wwgets(buf, n, w)
        !            52: char *buf;
        !            53: int n;
        !            54: register struct ww *w;
        !            55: {
        !            56:        register char *p = buf;
        !            57:        register char c;
        !            58:        char uc = w->ww_unctrl;
        !            59:        static void rub();
        !            60:
        !            61:        w->ww_unctrl = 0;
        !            62:        for (;;) {
        !            63:                wwcurtowin(w);
        !            64:                while ((c = wwgetc()) < 0)
        !            65:                        wwiomux();
        !            66: #ifdef OLD_TTY
        !            67:                if (c == wwoldtty.ww_sgttyb.sg_erase)
        !            68: #else
        !            69:                if (c == wwoldtty.ww_termios.c_cc[VERASE])
        !            70: #endif
        !            71:                {
        !            72:                        if (p > buf)
        !            73:                                rub(*--p, w);
        !            74:                } else
        !            75: #ifdef OLD_TTY
        !            76:                if (c == wwoldtty.ww_sgttyb.sg_kill)
        !            77: #else
        !            78:                if (c == wwoldtty.ww_termios.c_cc[VKILL])
        !            79: #endif
        !            80:                {
        !            81:                        while (p > buf)
        !            82:                                rub(*--p, w);
        !            83:                } else
        !            84: #ifdef OLD_TTY
        !            85:                if (c == wwoldtty.ww_ltchars.t_werasc)
        !            86: #else
        !            87:                if (c == wwoldtty.ww_termios.c_cc[VWERASE])
        !            88: #endif
        !            89:                {
        !            90:                        while (--p >= buf && (*p == ' ' || *p == '\t'))
        !            91:                                rub(*p, w);
        !            92:                        while (p >= buf && *p != ' ' && *p != '\t')
        !            93:                                rub(*p--, w);
        !            94:                        p++;
        !            95:                } else if (c == '\r' || c == '\n') {
        !            96:                        break;
        !            97:                } else {
        !            98:                        if (p >= buf + n - 1)
        !            99:                                wwputc(ctrl('g'), w);
        !           100:                        else
        !           101:                                wwputs(unctrl(*p++ = c), w);
        !           102:                }
        !           103:        }
        !           104:        *p = 0;
        !           105:        w->ww_unctrl = uc;
        !           106: }
        !           107:
        !           108: static void
        !           109: rub(c, w)
        !           110: struct ww *w;
        !           111: {
        !           112:        register i;
        !           113:
        !           114:        for (i = strlen(unctrl(c)); --i >= 0;)
        !           115:                (void) wwwrite(w, "\b \b", 3);
        !           116: }