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

1.1     ! deraadt     1: /*     $NetBSD: wwdelline.c,v 1.3 1995/09/28 10:35:24 tls 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[] = "@(#)wwdelline.c        8.1 (Berkeley) 6/6/93";
        !            42: #else
        !            43: static char rcsid[] = "$NetBSD: wwdelline.c,v 1.3 1995/09/28 10:35:24 tls Exp $";
        !            44: #endif
        !            45: #endif /* not lint */
        !            46:
        !            47: #include "ww.h"
        !            48:
        !            49: wwdelline(w, row)
        !            50: register struct ww *w;
        !            51: int row;
        !            52: {
        !            53:        register i;
        !            54:        register union ww_char **cpp, **cqq;
        !            55:        register union ww_char *cp;
        !            56:        int row1, row2;
        !            57:        char deleted;
        !            58:        int visible;
        !            59:
        !            60:        /*
        !            61:         * Scroll first.
        !            62:         */
        !            63:        if ((row1 = row) < w->ww_i.t) {
        !            64:                row1 = w->ww_i.t;
        !            65:        }
        !            66:        if ((row2 = w->ww_b.b) > w->ww_i.b) {
        !            67:                row2 = w->ww_i.b;
        !            68:                visible = 0;
        !            69:        } else
        !            70:                visible = 1;
        !            71:        deleted = wwscroll1(w, row1, row2, 1, visible);
        !            72:
        !            73:        /*
        !            74:         * Fix the buffer.
        !            75:         * But leave clearing the last line for wwclreol().
        !            76:         */
        !            77:        cpp = &w->ww_buf[row];
        !            78:        cqq = cpp + 1;
        !            79:        cp = *cpp;
        !            80:        for (i = w->ww_b.b - row; --i > 0;)
        !            81:                *cpp++ = *cqq++;
        !            82:        *cpp = cp;
        !            83:
        !            84:        /*
        !            85:         * Now clear the last line.
        !            86:         */
        !            87:        if (visible)
        !            88:                wwclreol1(w, w->ww_b.b - 1, w->ww_b.l, deleted);
        !            89:        else {
        !            90:                cp += w->ww_b.l;
        !            91:                for (i = w->ww_b.nc; --i >= 0;)
        !            92:                        cp++->c_w = ' ';
        !            93:        }
        !            94: }