mirror of https://github.com/GnoConsortium/gno.git
237 lines
6.3 KiB
C
237 lines
6.3 KiB
C
/*
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* Copyright (c) 1981, 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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#ifndef lint
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static char sccsid[] = "@(#)setterm.c 8.7 (Berkeley) 7/27/94";
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#endif /* not lint */
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#include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "curses.h"
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static void zap __P((void));
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static char *sflags[] = {
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/* am bs da db eo hc in mi ms */
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&AM, &BS, &DA, &DB, &EO, &HC, &IN, &MI, &MS,
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/* nc ns os ul xb xn xt xs xx */
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&NC, &NS, &OS, &UL, &XB, &XN, &XT, &XS, &XX
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};
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static char *_PC,
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**sstrs[] = {
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/* AL bc bt cd ce cl cm cr cs */
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&AL, &BC, &BT, &CD, &CE, &CL, &CM, &CR, &CS,
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/* dc DL dm do ed ei k0 k1 k2 */
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&DC, &DL, &DM, &DO, &ED, &EI, &K0, &K1, &K2,
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/* k3 k4 k5 k6 k7 k8 k9 ho ic */
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&K3, &K4, &K5, &K6, &K7, &K8, &K9, &HO, &IC,
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/* im ip kd ke kh kl kr ks ku */
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&IM, &IP, &KD, &KE, &KH, &KL, &KR, &KS, &KU,
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/* ll ma nd nl pc rc sc se SF */
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&LL, &MA, &ND, &NL, &_PC, &RC, &SC, &SE, &SF,
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/* so SR ta te ti uc ue up us */
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&SO, &SR, &TA, &TE, &TI, &UC, &UE, &UP, &US,
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/* vb vs ve al dl sf sr AL */
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&VB, &VS, &VE, &al, &dl, &sf, &sr, &AL_PARM,
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/* DL UP DO LE */
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&DL_PARM, &UP_PARM, &DOWN_PARM, &LEFT_PARM,
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/* RI */
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&RIGHT_PARM,
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};
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static char *aoftspace; /* Address of _tspace for relocation */
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static char tspace[2048]; /* Space for capability strings */
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char *ttytype;
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int
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setterm(char *type)
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{
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static char genbuf[1024];
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static char __ttytype[1024];
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register int unknown;
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struct winsize win;
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char *p;
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#ifdef DEBUG
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__CTRACE("setterm: (\"%s\")\nLINES = %d, COLS = %d\n",
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type, LINES, COLS);
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#endif
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if (type[0] == '\0')
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type = "xx";
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unknown = 0;
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if (tgetent(genbuf, type) != 1) {
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unknown++;
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strcpy(genbuf, "xx|dumb:");
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}
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#ifdef DEBUG
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__CTRACE("setterm: tty = %s\n", type);
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#endif
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/* Try TIOCGWINSZ, and, if it fails, the termcap entry. */
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if (ioctl(__tty_fileno, TIOCGWINSZ, &win) != -1 &&
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win.ws_row != 0 && win.ws_col != 0) {
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LINES = win.ws_row;
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COLS = win.ws_col;
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} else {
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LINES = tgetnum("li");
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COLS = tgetnum("co");
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}
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/* POSIX 1003.2 requires that the environment override. */
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if ((p = getenv("LINES")) != NULL)
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LINES = strtol(p, NULL, 10);
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if ((p = getenv("COLUMNS")) != NULL)
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COLS = strtol(p, NULL, 10);
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/*
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* Want cols > 4, otherwise things will fail.
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*/
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if (COLS <= 4)
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return (ERR);
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#ifdef DEBUG
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__CTRACE("setterm: LINES = %d, COLS = %d\n", LINES, COLS);
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#endif
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aoftspace = tspace;
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zap(); /* Get terminal description. */
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/* If we can't tab, we can't backtab, either. */
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if (!GT)
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BT = NULL;
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/*
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* Test for cursor motion capbility.
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*
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* XXX
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* This is truly stupid -- tgoto returns "OOPS" if it can't
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* do cursor motions.
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*/
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if (tgoto(CM, 0, 0)[0] == 'O') {
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CA = 0;
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CM = 0;
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} else
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CA = 1;
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PC = _PC ? _PC[0] : 0;
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aoftspace = tspace;
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ttytype = longname(genbuf, __ttytype);
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__usecs =
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(AL == NULL && al == NULL || DL == NULL && dl == NULL) &&
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!NS && (SC != NULL && RC != NULL || HO != NULL) &&
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CS != NULL && (SR != NULL || sr != NULL);
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/* If no scrolling commands, no quick change. */
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__noqch = !__usecs &&
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(AL == NULL && al == NULL || DL == NULL && dl == NULL);
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return (unknown ? ERR : OK);
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}
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/*
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* zap --
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* Gets all the terminal flags from the termcap database.
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*/
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static void
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zap(void)
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{
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register char *namp, ***sp;
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register char **fp;
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char tmp[3];
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#ifdef DEBUG
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register char *cp;
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#endif
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tmp[2] = '\0';
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namp = "ambsdadbeohcinmimsncnsosulxbxnxtxsxx";
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fp = sflags;
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do {
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*tmp = *namp;
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*(tmp + 1) = *(namp + 1);
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*(*fp++) = tgetflag(tmp);
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#ifdef DEBUG
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__CTRACE("2.2s = %s\n", namp, *fp[-1] ? "TRUE" : "FALSE");
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#endif
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namp += 2;
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} while (*namp);
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namp = "ALbcbtcdceclcmcrcsdcDLdmdoedeik0k1k2k3k4k5k6k7k8k9hoicimipkdkekhklkrkskullmandnlpcrcscseSFsoSRtatetiucueupusvbvsvealdlsfsrALDLUPDOLERI";
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sp = sstrs;
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do {
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*tmp = *namp;
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*(tmp + 1) = *(namp + 1);
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*(*sp++) = tgetstr(tmp, &aoftspace);
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#ifdef DEBUG
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__CTRACE("2.2s = %s", namp, *sp[-1] == NULL ? "NULL\n" : "\"");
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if (*sp[-1] != NULL) {
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for (cp = *sp[-1]; *cp; cp++)
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__CTRACE("%s", unctrl(*cp));
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__CTRACE("\"\n");
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}
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#endif
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namp += 2;
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} while (*namp);
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if (XS)
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SO = SE = NULL;
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else {
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if (tgetnum("sg") > 0)
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SO = NULL;
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if (tgetnum("ug") > 0)
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US = NULL;
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if (!SO && US) {
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SO = US;
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SE = UE;
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}
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}
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}
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/*
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* getcap --
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* Return a capability from termcap.
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*/
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char *
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getcap(char *name)
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{
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return (tgetstr(name, &aoftspace));
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}
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