586d4ce109
of the SYSV curses facilities. The added features are the collapsing of arrow and function keysequences (as defined by termcap for the terminal) into symbolic code returns thus relieving the application of recognising multi-character key sequences. Other features are the capability to perform a timed wait for a key (good for when you are not sure if there is a keypress ready or not) and the capability for turning off the inter-key timeout when assembling multi-character function keys. this work was done by Julian Coleman <J.D.Coleman@newcastle.ac.uk> and blymn@baea.com.au (Brett Lymn). i'm just integrating it. thanks HEAPS guys!
147 lines
3.9 KiB
C
147 lines
3.9 KiB
C
/* $NetBSD: tscroll.c,v 1.5 1999/04/13 14:08:19 mrg Exp $ */
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/*-
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* Copyright (c) 1992, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)tscroll.c 8.4 (Berkeley) 7/27/94";
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#else
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__RCSID("$NetBSD: tscroll.c,v 1.5 1999/04/13 14:08:19 mrg Exp $");
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#endif
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#endif /* not lint */
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#include "curses.h"
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#define MAXRETURNSIZE 64
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/*
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* Routine to perform scrolling. Derived from tgoto.c in termcap(3)
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* library. Cap is a string containing printf type escapes to allow
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* scrolling. The following escapes are defined for substituting n:
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*
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* %d as in printf
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* %2 like %2d
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* %3 like %3d
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* %. gives %c hacking special case characters
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* %+x like %c but adding x first
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*
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* The codes below affect the state but don't use up a value.
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*
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* %>xy if value > x add y
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* %i increments n
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* %% gives %
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* %B BCD (2 decimal digits encoded in one byte)
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* %D Delta Data (backwards bcd)
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*
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* all other characters are ``self-inserting''.
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*/
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char *
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__tscroll(cap, n1, n2)
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const char *cap;
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int n1, n2;
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{
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static char result[MAXRETURNSIZE];
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int c, n;
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char *dp;
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if (cap == NULL)
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goto err;
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for (n = n1, dp = result; (c = *cap++) != '\0';) {
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if (c != '%') {
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*dp++ = c;
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continue;
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}
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switch (c = *cap++) {
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case 'n':
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n ^= 0140;
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continue;
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case 'd':
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if (n < 10)
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goto one;
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if (n < 100)
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goto two;
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/* FALLTHROUGH */
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case '3':
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*dp++ = (n / 100) | '0';
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n %= 100;
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/* FALLTHROUGH */
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case '2':
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two: *dp++ = n / 10 | '0';
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one: *dp++ = n % 10 | '0';
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n = n2;
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continue;
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case '>':
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if (n > *cap++)
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n += *cap++;
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else
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cap++;
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continue;
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case '+':
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n += *cap++;
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/* FALLTHROUGH */
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case '.':
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*dp++ = n;
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continue;
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case 'i':
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n++;
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continue;
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case '%':
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*dp++ = c;
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continue;
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case 'B':
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n = (n / 10 << 4) + n % 10;
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continue;
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case 'D':
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n = n - 2 * (n % 16);
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continue;
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/*
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* XXX
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* System V terminfo files have lots of extra gunk.
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* The only one we've seen in scrolling strings is
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* %pN, and it seems to work okay if we ignore it.
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*/
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case 'p':
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++cap;
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continue;
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default:
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goto err;
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}
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}
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*dp = '\0';
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return (result);
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err: return ("curses: __tscroll failed");
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}
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