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Annotation of 43BSDReno/usr.bin/window/wwgets.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1983 Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * This code is derived from software contributed to Berkeley by
        !             6:  * Edward Wang at The University of California, Berkeley.
        !             7:  *
        !             8:  * Redistribution and use in source and binary forms are permitted provided
        !             9:  * that: (1) source distributions retain this entire copyright notice and
        !            10:  * comment, and (2) distributions including binaries display the following
        !            11:  * acknowledgement:  ``This product includes software developed by the
        !            12:  * University of California, Berkeley and its contributors'' in the
        !            13:  * documentation or other materials provided with the distribution and in
        !            14:  * all advertising materials mentioning features or use of this software.
        !            15:  * Neither the name of the University nor the names of its contributors may
        !            16:  * be used to endorse or promote products derived from this software without
        !            17:  * specific prior written permission.
        !            18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            21:  */
        !            22: 
        !            23: #ifndef lint
        !            24: static char sccsid[] = "@(#)wwgets.c   3.15 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: #include "char.h"
        !            29: 
        !            30: wwgets(buf, n, w)
        !            31: char *buf;
        !            32: int n;
        !            33: register struct ww *w;
        !            34: {
        !            35:        register char *p = buf;
        !            36:        register char c;
        !            37:        char uc = w->ww_unctrl;
        !            38: 
        !            39:        w->ww_unctrl = 0;
        !            40:        for (;;) {
        !            41:                wwcurtowin(w);
        !            42:                while ((c = wwgetc()) < 0)
        !            43:                        wwiomux();
        !            44: #ifndef POSIX_TTY
        !            45:                if (c == wwoldtty.ww_sgttyb.sg_erase)
        !            46: #else
        !            47:                if (c == wwoldtty.ww_termios.c_cc[VERASE])
        !            48: #endif
        !            49:                {
        !            50:                        if (p > buf)
        !            51:                                rub(*--p, w);
        !            52:                } else
        !            53: #ifndef POSIX_TTY
        !            54:                if (c == wwoldtty.ww_sgttyb.sg_kill)
        !            55: #else
        !            56:                if (c == wwoldtty.ww_termios.c_cc[VKILL])
        !            57: #endif
        !            58:                {
        !            59:                        while (p > buf)
        !            60:                                rub(*--p, w);
        !            61:                } else
        !            62: #ifndef POSIX_TTY
        !            63:                if (c == wwoldtty.ww_ltchars.t_werasc)
        !            64: #else
        !            65:                if (c == wwoldtty.ww_termios.c_cc[VWERASE])
        !            66: #endif
        !            67:                {
        !            68:                        while (--p >= buf && (*p == ' ' || *p == '\t'))
        !            69:                                rub(*p, w);
        !            70:                        while (p >= buf && *p != ' ' && *p != '\t')
        !            71:                                rub(*p--, w);
        !            72:                        p++;
        !            73:                } else if (c == '\r' || c == '\n') {
        !            74:                        break;
        !            75:                } else {
        !            76:                        if (p >= buf + n - 1)
        !            77:                                wwputc(ctrl('g'), w);
        !            78:                        else
        !            79:                                wwputs(unctrl(*p++ = c), w);
        !            80:                }
        !            81:        }
        !            82:        *p = 0;
        !            83:        w->ww_unctrl = uc;
        !            84: }
        !            85: 
        !            86: static
        !            87: rub(c, w)
        !            88: struct ww *w;
        !            89: {
        !            90:        register i;
        !            91: 
        !            92:        for (i = strlen(unctrl(c)); --i >= 0;)
        !            93:                (void) wwwrite(w, "\b \b", 3);
        !            94: }

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