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NetBSD/lib/libcurses/setterm.c

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/* $NetBSD: setterm.c,v 1.28 2000/12/22 17:07:13 jdc Exp $ */
/*
* Copyright (c) 1981, 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)setterm.c 8.8 (Berkeley) 10/25/94";
#else
__RCSID("$NetBSD: setterm.c,v 1.28 2000/12/22 17:07:13 jdc Exp $");
#endif
#endif /* not lint */
#include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "curses.h"
#include "curses_private.h"
static int zap(struct tinfo *tinfo);
struct tinfo *_cursesi_genbuf;
static char *sflags[] = {
/* am bs cc da eo */
&__tc_am, &__tc_bs, &__tc_cc, &__tc_da, &__tc_eo,
/* hc hl in mi ms */
&__tc_hc, &__tc_hl, &__tc_in, &__tc_mi, &__tc_ms,
/* nc ns os ul ut */
&__tc_nc, &__tc_ns, &__tc_os, &__tc_ul, &__tc_ut,
/* xb xn xt xs xx */
&__tc_xb, &__tc_xn, &__tc_xt, &__tc_xs, &__tc_xx
};
static int *svals[] = {
/* pa Co NC */
&__tc_pa, &__tc_Co, &__tc_NC
};
static char *_PC,
**sstrs[] = {
/* AB ac ae AF AL */
&__tc_AB, &__tc_ac, &__tc_ae, &__tc_AF, &__tc_AL,
/* al as bc bl bt */
&__tc_al, &__tc_as, &__tc_bc, &__tc_bl, &__tc_bt,
/* cd ce cl cm cr */
&__tc_cd, &__tc_ce, &__tc_cl, &__tc_cm, &__tc_cr,
/* cs dc DL dl dm */
&__tc_cs, &__tc_dc, &__tc_DL, &__tc_dl, &__tc_dm,
/* DO do eA ed ei */
&__tc_DO, &__tc_do, &__tc_eA, &__tc_ed, &__tc_ei,
/* ho Ic ic im Ip */
&__tc_ho, &__tc_Ic, &__tc_ic, &__tc_im, &__tc_Ip,
/* ip k0 k1 k2 k3 */
&__tc_ip, &__tc_k0, &__tc_k1, &__tc_k2, &__tc_k3,
/* k4 k5 k6 k7 k8 */
&__tc_k4, &__tc_k5, &__tc_k6, &__tc_k7, &__tc_k8,
/* k9 kd ke kh kl */
&__tc_k9, &__tc_kd, &__tc_ke, &__tc_kh, &__tc_kl,
/* kr ks ku LE ll */
&__tc_kr, &__tc_ks, &__tc_ku, &__tc_LE, &__tc_ll,
/* ma mb md me mh */
&__tc_ma, &__tc_mb, &__tc_md, &__tc_me, &__tc_mh,
/* mk mm mo mp mr */
&__tc_mk, &__tc_mm, &__tc_mo, &__tc_mp, &__tc_mr,
/* nd nl oc op pc */
&__tc_nd, &__tc_nl, &__tc_oc, &__tc_op, &_PC,
/* rc RI sc Sb se */
&__tc_rc, &__tc_RI, &__tc_Sb, &__tc_sc, &__tc_se,
/* SF Sf sf so sp */
&__tc_SF, &__tc_Sf, &__tc_sf, &__tc_so, &__tc_sp,
/* SR sr ta te ti */
&__tc_SR, &__tc_sr, &__tc_ta, &__tc_te, &__tc_ti,
/* uc ue UP up us */
&__tc_uc, &__tc_ue, &__tc_UP, &__tc_up, &__tc_us,
/* vb ve vi vs */
&__tc_vb, &__tc_ve, &__tc_vi, &__tc_vs
};
static char *aoftspace; /* Address of _tspace for relocation */
static char *tspace; /* Space for capability strings */
static size_t tspace_size; /* size of tspace */
char *ttytype;
attr_t __mask_op, __mask_me, __mask_ue, __mask_se;
int
setterm(char *type)
{
static char __ttytype[128], cm_buff[1024], tc[1024], *tcptr;
int unknown;
size_t limit;
struct winsize win;
char *p;
#ifdef DEBUG
__CTRACE("setterm: (\"%s\")\nLINES = %d, COLS = %d\n",
type, LINES, COLS);
#endif
if (type[0] == '\0')
type = "xx";
unknown = 0;
if (t_getent(&_cursesi_genbuf, type) != 1) {
unknown++;
}
#ifdef DEBUG
__CTRACE("setterm: tty = %s\n", type);
#endif
/* Try TIOCGWINSZ, and, if it fails, the termcap entry. */
if (ioctl(STDERR_FILENO, TIOCGWINSZ, &win) != -1 &&
win.ws_row != 0 && win.ws_col != 0) {
LINES = win.ws_row;
COLS = win.ws_col;
} else {
if (unknown) {
LINES = -1;
COLS = -1;
} else {
LINES = t_getnum(_cursesi_genbuf, "li");
COLS = t_getnum(_cursesi_genbuf, "co");
}
}
/* POSIX 1003.2 requires that the environment override. */
if ((p = getenv("LINES")) != NULL)
LINES = (int) strtol(p, NULL, 10);
if ((p = getenv("COLUMNS")) != NULL)
COLS = (int) strtol(p, NULL, 10);
/*
* Want cols > 4, otherwise things will fail.
*/
if (COLS <= 4)
return (ERR);
#ifdef DEBUG
__CTRACE("setterm: LINES = %d, COLS = %d\n", LINES, COLS);
#endif
if (!unknown) {
if (zap(_cursesi_genbuf) == ERR) /* Get terminal description.*/
return ERR;
}
/* If we can't tab, we can't backtab, either. */
if (!__GT)
__tc_bt = NULL;
/*
* Test for cursor motion capability.
*
*/
if (t_goto(NULL, __tc_cm, 0, 0, cm_buff, 1023) < 0) {
__CA = 0;
__tc_cm = 0;
} else
__CA = 1;
PC = _PC ? _PC[0] : 0;
aoftspace = tspace;
if (unknown) {
strcpy(ttytype, "dumb");
} else {
tcptr = tc;
limit = 1023;
if (t_getterm(_cursesi_genbuf, &tcptr, &limit) < 0)
return ERR;
ttytype = __longname(tc, __ttytype);
}
/* If no scrolling commands, no quick change. */
__noqch =
(__tc_cs == NULL || __tc_ho == NULL ||
(__tc_SF == NULL && __tc_sf == NULL) || (__tc_SR == NULL && __tc_sr == NULL)) &&
((__tc_AL == NULL && __tc_al == NULL) || (__tc_DL == NULL && __tc_dl == NULL));
/* Precalculate conflict info for color/attribute end commands. */
__mask_op = __ATTRIBUTES & ~__COLOR;
if (__tc_op != NULL) {
if (__tc_se != NULL && !strcmp(__tc_op, __tc_se))
__mask_op &= ~__STANDOUT;
if (__tc_ue != NULL && !strcmp(__tc_op, __tc_ue))
__mask_op &= ~__UNDERSCORE;
if (__tc_me != NULL && !strcmp(__tc_op, __tc_me))
__mask_op &= ~__TERMATTR;
}
__mask_me = __ATTRIBUTES & ~__TERMATTR;
if (__tc_me != NULL) {
if (__tc_se != NULL && !strcmp(__tc_me, __tc_se))
__mask_me &= ~__STANDOUT;
if (__tc_ue != NULL && !strcmp(__tc_me, __tc_ue))
__mask_me &= ~__UNDERSCORE;
if (__tc_op != NULL && !strcmp(__tc_me, __tc_op))
__mask_me &= ~__COLOR;
}
__mask_ue = __ATTRIBUTES & ~__UNDERSCORE;
if (__tc_ue != NULL) {
if (__tc_se != NULL && !strcmp(__tc_ue, __tc_se))
__mask_ue &= ~__STANDOUT;
if (__tc_me != NULL && !strcmp(__tc_ue, __tc_me))
__mask_ue &= ~__TERMATTR;
if (__tc_op != NULL && !strcmp(__tc_ue, __tc_op))
__mask_ue &= ~__COLOR;
}
__mask_se = __ATTRIBUTES & ~__STANDOUT;
if (__tc_se != NULL) {
if (__tc_ue != NULL && !strcmp(__tc_se, __tc_ue))
__mask_se &= ~__UNDERSCORE;
if (__tc_me != NULL && !strcmp(__tc_se, __tc_me))
__mask_se &= ~__TERMATTR;
if (__tc_op != NULL && !strcmp(__tc_se, __tc_op))
__mask_se &= ~__COLOR;
}
return (unknown ? ERR : OK);
}
/*
* zap --
* Gets all the terminal flags from the termcap database.
*/
static int
zap(struct tinfo *tinfo)
{
const char *nampstr, *namp;
char ***sp;
int **vp;
char **fp;
char tmp[3];
size_t i;
#ifdef DEBUG
char *cp;
#endif
tmp[2] = '\0';
namp = "ambsccdaeohchlinmimsncnsosulutxbxnxtxsxx";
fp = sflags;
do {
*tmp = *namp;
*(tmp + 1) = *(namp + 1);
*(*fp++) = t_getflag(tinfo, tmp);
#ifdef DEBUG
__CTRACE("%2.2s = %s\n", namp, *fp[-1] ? "TRUE" : "FALSE");
#endif
namp += 2;
} while (*namp);
namp = "paCoNC";
vp = svals;
do {
*tmp = *namp;
*(tmp + 1) = *(namp + 1);
*(*vp++) = t_getnum(tinfo, tmp);
#ifdef DEBUG
__CTRACE("%2.2s = %d\n", namp, *vp[-1]);
#endif
namp += 2;
} while (*namp);
/* calculate the size of tspace.... */
nampstr = "ABacaeAFALalasbcblbtcdceclcmcrcsdcDLdldmDOdoeAedeihoIcicimIpipk0k1k2k3k4k5k6k7k8k9kdkekhklkrkskuLEllmambmdmemhmkmmmompmrndnlocoppcrcRISbscseSFSfsfsospSRsrtatetiucueUPupusvbvevivs";
namp = nampstr;
tspace_size = 0;
do {
*tmp = *namp;
*(tmp + 1) = *(namp + 1);
t_getstr(tinfo, tmp, NULL, &i);
tspace_size += i + 1;
namp += 2;
} while (*namp);
if ((tspace = (char *) malloc(tspace_size)) == NULL)
return ERR;
#ifdef DEBUG
__CTRACE("Allocated %d (0x%x) size buffer for tspace\n", tspace_size,
tspace_size);
#endif
aoftspace = tspace;
namp = nampstr;
sp = sstrs;
do {
*tmp = *namp;
*(tmp + 1) = *(namp + 1);
*(*sp++) = t_getstr(tinfo, tmp, &aoftspace, NULL);
#ifdef DEBUG
__CTRACE("%2.2s = %s", namp, *sp[-1] == NULL ? "NULL\n" : "\"");
if (*sp[-1] != NULL) {
for (cp = *sp[-1]; *cp; cp++)
__CTRACE("%s", unctrl(*cp));
__CTRACE("\"\n");
}
#endif
namp += 2;
} while (*namp);
if (__tc_xs)
__tc_so = __tc_se = NULL;
else {
if (t_getnum(tinfo, "sg") > 0)
__tc_so = NULL;
if (t_getnum(tinfo, "ug") > 0)
__tc_us = NULL;
if (!__tc_so && __tc_us) {
__tc_so = __tc_us;
__tc_se = __tc_ue;
}
}
return OK;
}
/*
* getcap --
* Return a capability from termcap.
*/
char *
getcap(char *name)
{
size_t ent_size, offset;
char *new_tspace;
/* verify cap exists and grab size of it at the same time */
t_getstr(_cursesi_genbuf, name, NULL, &ent_size);
/* grow tspace to hold the new cap */
if ((new_tspace = realloc(tspace, ent_size + tspace_size)) == NULL)
return NULL;
/* point aoftspace to the same place in the newly allocated buffer */
offset = aoftspace - tspace;
tspace = new_tspace + offset;
return (t_getstr(_cursesi_genbuf, name, &aoftspace, NULL));
}
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