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

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1989 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[] = "@(#)xx.c       3.6 (Berkeley) 6/6/90";
        !            25: #endif /* not lint */
        !            26: 
        !            27: #include "ww.h"
        !            28: #include "xx.h"
        !            29: #include "tt.h"
        !            30: 
        !            31: xxinit()
        !            32: {
        !            33:        if (ttinit() < 0)
        !            34:                return -1;
        !            35:        xxbufsize = tt.tt_nrow * tt.tt_ncol * 2;
        !            36:        /* ccinit may choose to change xxbufsize */
        !            37:        if (tt.tt_ntoken > 0 && ccinit() < 0)
        !            38:                return -1;
        !            39:        xxbuf = malloc((unsigned) xxbufsize * sizeof *xxbuf);
        !            40:        if (xxbuf == 0) {
        !            41:                wwerrno = WWE_NOMEM;
        !            42:                return -1;
        !            43:        }
        !            44:        xxbufp = xxbuf;
        !            45:        xxbufe = xxbuf + xxbufsize;
        !            46:        return 0;
        !            47: }
        !            48: 
        !            49: xxstart()
        !            50: {
        !            51:        (*tt.tt_start)();
        !            52:        if (tt.tt_ntoken > 0)
        !            53:                ccstart();
        !            54:        xxreset();                      /* might be a restart */
        !            55: }
        !            56: 
        !            57: xxend()
        !            58: {
        !            59:        if (tt.tt_scroll_top != 0 || tt.tt_scroll_bot != tt.tt_nrow - 1)
        !            60:                /* tt.tt_setscroll is known to be defined */
        !            61:                (*tt.tt_setscroll)(0, tt.tt_nrow - 1);
        !            62:        if (tt.tt_modes)
        !            63:                (*tt.tt_setmodes)(0);
        !            64:        if (tt.tt_scroll_down)
        !            65:                (*tt.tt_scroll_down)(1);
        !            66:        (*tt.tt_move)(tt.tt_nrow - 1, 0);
        !            67:        if (tt.tt_ntoken > 0)
        !            68:                ccend();
        !            69:        (*tt.tt_end)();
        !            70:        (*tt.tt_flush)();
        !            71: }
        !            72: 
        !            73: struct xx *
        !            74: xxalloc()
        !            75: {
        !            76:        register struct xx *xp;
        !            77: 
        !            78:        if (xxbufp > xxbufe)
        !            79:                abort();
        !            80:        if ((xp = xx_freelist) == 0)
        !            81:                /* XXX can't deal with failure */
        !            82:                xp = (struct xx *) malloc((unsigned) sizeof *xp);
        !            83:        else
        !            84:                xx_freelist = xp->link;
        !            85:        if (xx_head == 0)
        !            86:                xx_head = xp;
        !            87:        else
        !            88:                xx_tail->link = xp;
        !            89:        xx_tail = xp;
        !            90:        xp->link = 0;
        !            91:        return xp;
        !            92: }
        !            93: 
        !            94: xxfree(xp)
        !            95:        register struct xx *xp;
        !            96: {
        !            97:        xp->link = xx_freelist;
        !            98:        xx_freelist = xp;
        !            99: }
        !           100: 
        !           101: xxmove(row, col)
        !           102: {
        !           103:        register struct xx *xp = xx_tail;
        !           104: 
        !           105:        if (xp == 0 || xp->cmd != xc_move) {
        !           106:                xp = xxalloc();
        !           107:                xp->cmd = xc_move;
        !           108:        }
        !           109:        xp->arg0 = row;
        !           110:        xp->arg1 = col;
        !           111: }
        !           112: 
        !           113: xxscroll(dir, top, bot)
        !           114: {
        !           115:        register struct xx *xp = xx_tail;
        !           116: 
        !           117:        if (xp != 0 && xp->cmd == xc_scroll &&
        !           118:            xp->arg1 == top && xp->arg2 == bot &&
        !           119:            (xp->arg0 < 0 && dir < 0 || xp->arg0 > 0 && dir > 0)) {
        !           120:                xp->arg0 += dir;
        !           121:                return;
        !           122:        }
        !           123:        xp = xxalloc();
        !           124:        xp->cmd = xc_scroll;
        !           125:        xp->arg0 = dir;
        !           126:        xp->arg1 = top;
        !           127:        xp->arg2 = bot;
        !           128: }
        !           129: 
        !           130: xxinschar(row, col, c, m)
        !           131: {
        !           132:        register struct xx *xp;
        !           133: 
        !           134:        xp = xxalloc();
        !           135:        xp->cmd = xc_inschar;
        !           136:        xp->arg0 = row;
        !           137:        xp->arg1 = col;
        !           138:        xp->arg2 = c;
        !           139:        xp->arg3 = m;
        !           140: }
        !           141: 
        !           142: xxinsspace(row, col)
        !           143: {
        !           144:        register struct xx *xp = xx_tail;
        !           145: 
        !           146:        if (xp != 0 && xp->cmd == xc_insspace && xp->arg0 == row &&
        !           147:            col >= xp->arg1 && col <= xp->arg1 + xp->arg2) {
        !           148:                xp->arg2++;
        !           149:                return;
        !           150:        }
        !           151:        xp = xxalloc();
        !           152:        xp->cmd = xc_insspace;
        !           153:        xp->arg0 = row;
        !           154:        xp->arg1 = col;
        !           155:        xp->arg2 = 1;
        !           156: }
        !           157: 
        !           158: xxdelchar(row, col)
        !           159: {
        !           160:        register struct xx *xp = xx_tail;
        !           161: 
        !           162:        if (xp != 0 && xp->cmd == xc_delchar &&
        !           163:            xp->arg0 == row && xp->arg1 == col) {
        !           164:                xp->arg2++;
        !           165:                return;
        !           166:        }
        !           167:        xp = xxalloc();
        !           168:        xp->cmd = xc_delchar;
        !           169:        xp->arg0 = row;
        !           170:        xp->arg1 = col;
        !           171:        xp->arg2 = 1;
        !           172: }
        !           173: 
        !           174: xxclear()
        !           175: {
        !           176:        register struct xx *xp;
        !           177: 
        !           178:        xxreset();
        !           179:        xp = xxalloc();
        !           180:        xp->cmd = xc_clear;
        !           181: }
        !           182: 
        !           183: xxclreos(row, col)
        !           184: {
        !           185:        register struct xx *xp = xxalloc();
        !           186: 
        !           187:        xp->cmd = xc_clreos;
        !           188:        xp->arg0 = row;
        !           189:        xp->arg1 = col;
        !           190: }
        !           191: 
        !           192: xxclreol(row, col)
        !           193: {
        !           194:        register struct xx *xp = xxalloc();
        !           195: 
        !           196:        xp->cmd = xc_clreol;
        !           197:        xp->arg0 = row;
        !           198:        xp->arg1 = col;
        !           199: }
        !           200: 
        !           201: xxwrite(row, col, p, n, m)
        !           202:        char *p;
        !           203: {
        !           204:        register struct xx *xp;
        !           205: 
        !           206:        if (xxbufp + n + 1 > xxbufe)
        !           207:                xxflush(0);
        !           208:        xp = xxalloc();
        !           209:        xp->cmd = xc_write;
        !           210:        xp->arg0 = row;
        !           211:        xp->arg1 = col;
        !           212:        xp->arg2 = n;
        !           213:        xp->arg3 = m;
        !           214:        xp->buf = xxbufp;
        !           215:        bcopy(p, xxbufp, n);
        !           216:        xxbufp += n;
        !           217:        *xxbufp++ = char_sep;
        !           218: }
        !           219: 
        !           220: xxreset()
        !           221: {
        !           222:        register struct xx *xp, *xq;
        !           223: 
        !           224:        for (xp = xx_head; xp != 0; xp = xq) {
        !           225:                xq = xp->link;
        !           226:                xxfree(xp);
        !           227:        }
        !           228:        xx_tail = xx_head = 0;
        !           229:        xxbufp = xxbuf;
        !           230: }

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