mirror of
https://git.hardenedbsd.org/hardenedbsd/HardenedBSD.git
synced 2024-12-29 15:10:57 +01:00
143 lines
3.8 KiB
C
143 lines
3.8 KiB
C
/*-
|
|
* Copyright (c) 1992, 1993, 1994
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)tscroll.c 8.4 (Berkeley) 7/27/94";
|
|
#endif /* not lint */
|
|
|
|
#include "curses.h"
|
|
|
|
#define MAXRETURNSIZE 64
|
|
|
|
/*
|
|
* Routine to perform scrolling. Derived from tgoto.c in tercamp(3)
|
|
* library. Cap is a string containing printf type escapes to allow
|
|
* scrolling. The following escapes are defined for substituting n:
|
|
*
|
|
* %d as in printf
|
|
* %2 like %2d
|
|
* %3 like %3d
|
|
* %. gives %c hacking special case characters
|
|
* %+x like %c but adding x first
|
|
*
|
|
* The codes below affect the state but don't use up a value.
|
|
*
|
|
* %>xy if value > x add y
|
|
* %i increments n
|
|
* %% gives %
|
|
* %B BCD (2 decimal digits encoded in one byte)
|
|
* %D Delta Data (backwards bcd)
|
|
*
|
|
* all other characters are ``self-inserting''.
|
|
*/
|
|
char *
|
|
__tscroll(cap, n1, n2)
|
|
const char *cap;
|
|
int n1, n2;
|
|
{
|
|
static char result[MAXRETURNSIZE];
|
|
int c, n, increment = 0;
|
|
char *dp;
|
|
|
|
if (cap == NULL)
|
|
goto err;
|
|
for (n = n1, dp = result; (c = *cap++) != '\0';) {
|
|
if (c != '%') {
|
|
*dp++ = c;
|
|
continue;
|
|
}
|
|
switch (c = *cap++) {
|
|
case 'n':
|
|
n ^= 0140;
|
|
continue;
|
|
case 'd':
|
|
if (n < 10)
|
|
goto one;
|
|
if (n < 100)
|
|
goto two;
|
|
/* FALLTHROUGH */
|
|
case '3':
|
|
*dp++ = (n / 100) | '0';
|
|
n %= 100;
|
|
/* FALLTHROUGH */
|
|
case '2':
|
|
two: *dp++ = n / 10 | '0';
|
|
one: *dp++ = n % 10 | '0';
|
|
n = n2;
|
|
if (increment)
|
|
n++;
|
|
continue;
|
|
case '>':
|
|
if (n > *cap++)
|
|
n += *cap++;
|
|
else
|
|
cap++;
|
|
continue;
|
|
case '+':
|
|
n += *cap++;
|
|
/* FALLTHROUGH */
|
|
case '.':
|
|
*dp++ = n;
|
|
continue;
|
|
case 'i':
|
|
increment = 1;
|
|
n++;
|
|
continue;
|
|
case '%':
|
|
*dp++ = c;
|
|
continue;
|
|
case 'B':
|
|
n = (n / 10 << 4) + n % 10;
|
|
continue;
|
|
case 'D':
|
|
n = n - 2 * (n % 16);
|
|
continue;
|
|
/*
|
|
* XXX
|
|
* System V terminfo files have lots of extra gunk.
|
|
* The only one we've seen in scrolling strings is
|
|
* %pN, and it seems to work okay if we ignore it.
|
|
*/
|
|
case 'p':
|
|
++cap;
|
|
continue;
|
|
default:
|
|
goto err;
|
|
}
|
|
}
|
|
*dp = '\0';
|
|
return (result);
|
|
|
|
err: return("curses: __tscroll failed");
|
|
}
|