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956eebdf62
zsh/Src/Modules/termcap.c
Bart Schaefer 2a9ceecf13 Untrustworthy return value of tgetflag().
2001-06-08 03:03:28 +00:00

431 lines
12 KiB
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/*
* termcap.c - termcap manipulation through curses
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 1992-1997 Paul Falstad
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Paul Falstad or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Paul Falstad and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Paul Falstad and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Paul Falstad and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
/*
* We need to include the zsh headers later to avoid clashes with
* the definitions on some systems, however we need the configuration
* file to decide whether we should avoid curses.h, which clashes
* with several zsh constants on some systems (e.g. SunOS 4).
*/
#include "../../config.h"
#ifdef HAVE_TGETENT
# if defined(HAVE_CURSES_H) && defined(HAVE_TERM_H)
# define USES_TERM_H 1
# else
# ifdef HAVE_TERMCAP_H
# define USES_TERMCAP_H 1
# endif
# endif
#endif
#include "termcap.mdh"
#include "termcap.pro"
static char termcap_nam[] = "termcap";
#ifdef HAVE_TGETENT
# ifdef USES_TERM_H
# ifdef HAVE_TERMIO_H
# include <termio.h>
# endif
# ifdef TERM_H_NEEDS_CURSES_H
# include <curses.h>
# endif
# include <term.h>
# else
# ifdef USES_TERMCAP_H
# include <termcap.h>
# endif
# endif
static Param termcap_pm;
#ifndef HAVE_BOOLCODES
static char *boolcodes[] = {
"bw", "am", "ut", "cc", "xs", "YA", "YF", "YB", "xt", "xn", "eo",
"gn", "hc", "HC", "km", "YC", "hs", "hl", "in", "YG", "da", "db",
"mi", "ms", "nx", "xb", "NP", "ND", "NR", "os", "5i", "YD", "YE",
"es", "hz", "ul", "xo", NULL};
#endif
/**/
static int
ztgetflag(char *s)
{
char **b;
/* ncurses can tell if an existing boolean capability is *
* off, but other curses variants can't, so we fudge it. *
* This feature of ncurses appears to have gone away as *
* of NCURSES_MAJOR_VERSION == 5, so don't rely on it. */
switch (tgetflag(s)) {
case -1:
break;
case 0:
for (b = (char **)boolcodes; *b; ++b)
if (s[0] == (*b)[0] && s[1] == (*b)[1])
return 0;
break;
default:
return 1;
}
return -1;
}
/* echotc: output a termcap */
/**/
static int
bin_echotc(char *name, char **argv, char *ops, int func)
{
char *s, buf[2048], *t, *u;
int num, argct;
s = *argv++;
if (termflags & TERM_BAD)
return 1;
if ((termflags & TERM_UNKNOWN) && (isset(INTERACTIVE) || !init_term()))
return 1;
/* if the specified termcap has a numeric value, display it */
if ((num = tgetnum(s)) != -1) {
printf("%d\n", num);
return 0;
}
/* if the specified termcap is boolean, and set, say so */
switch (ztgetflag(s)) {
case -1:
break;
case 0:
puts("no");
return 0;
default:
puts("yes");
return 0;
}
/* get a string-type capability */
u = buf;
t = tgetstr(s, &u);
if (t == (char *)-1 || !t || !*t) {
/* capability doesn't exist, or (if boolean) is off */
zwarnnam(name, "no such capability: %s", s, 0);
return 1;
}
/* count the number of arguments required */
for (argct = 0, u = t; *u; u++)
if (*u == '%') {
if (u++, (*u == 'd' || *u == '2' || *u == '3' || *u == '.' ||
*u == '+'))
argct++;
}
/* check that the number of arguments provided is correct */
if (arrlen(argv) != argct) {
zwarnnam(name, (arrlen(argv) < argct) ? "not enough arguments" :
"too many arguments", NULL, 0);
return 1;
}
/* output string, through the proper termcap functions */
if (!argct)
tputs(t, 1, putraw);
else {
num = (argv[1]) ? atoi(argv[1]) : atoi(*argv);
tputs(tgoto(t, atoi(*argv), num), num, putraw);
}
return 0;
}
#else /* ! HAVE_TGETENT */
#define bin_echotc bin_notavail
#endif /* HAVE_TGETENT */
static struct builtin bintab[] = {
BUILTIN("echotc", 0, bin_echotc, 1, -1, 0, NULL, NULL),
};
/**/
#ifdef HAVE_TGETENT
/* Empty dummy function for special hash parameters. */
/**/
static void
shempty(void)
{
}
/* Create a simple special hash parameter. */
/**/
static Param
createtchash()
{
Param pm;
HashTable ht;
unsetparam(termcap_nam);
if (!(pm = createparam(termcap_nam, PM_SPECIAL|PM_HIDE|PM_HIDEVAL|
PM_REMOVABLE|PM_HASHED)))
return NULL;
pm->level = pm->old ? locallevel : 0;
pm->gets.hfn = hashgetfn;
pm->sets.hfn = hashsetfn;
pm->unsetfn = stdunsetfn;
pm->u.hash = ht = newhashtable(7, termcap_nam, NULL);
ht->hash = hasher;
ht->emptytable = (TableFunc) shempty;
ht->filltable = NULL;
ht->addnode = (AddNodeFunc) shempty;
ht->getnode = ht->getnode2 = gettermcap;
ht->removenode = (RemoveNodeFunc) shempty;
ht->disablenode = NULL;
ht->enablenode = NULL;
ht->freenode = (FreeNodeFunc) shempty;
ht->printnode = printparamnode;
ht->scantab = scantermcap;
return (termcap_pm = pm);
}
/**/
static HashNode
gettermcap(HashTable ht, char *name)
{
int len, num;
char *tcstr, buf[2048], *u;
Param pm = NULL;
/* This depends on the termcap stuff in init.c */
if (termflags & TERM_BAD)
return NULL;
if ((termflags & TERM_UNKNOWN) && (isset(INTERACTIVE) || !init_term()))
return NULL;
unmetafy(name, &len);
pm = (Param) zhalloc(sizeof(struct param));
pm->nam = dupstring(name);
pm->flags = PM_READONLY;
pm->sets.cfn = NULL;
pm->gets.cfn = strgetfn;
pm->sets.ifn = NULL;
pm->gets.ifn = intgetfn;
pm->unsetfn = NULL;
pm->ct = 0;
pm->env = NULL;
pm->ename = NULL;
pm->old = NULL;
pm->level = 0;
u = buf;
/* logic in the following cascade copied from echotc, above */
if ((num = tgetnum(name)) != -1) {
pm->u.val = num;
pm->flags |= PM_INTEGER;
return (HashNode) pm;
}
switch (ztgetflag(name)) {
case -1:
break;
case 0:
pm->u.str = dupstring("no");
pm->flags |= PM_SCALAR;
return (HashNode) pm;
default:
pm->u.str = dupstring("yes");
pm->flags |= PM_SCALAR;
return (HashNode) pm;
}
if ((tcstr = tgetstr(name, &u)) != NULL && tcstr != (char *)-1)
{
pm->u.str = dupstring(tcstr);
pm->flags |= PM_SCALAR;
}
else
{
/* zwarn("no such capability: %s", name, 0); */
pm->u.str = dupstring("");
pm->flags |= PM_UNSET;
}
return (HashNode) pm;
}
/**/
static void
scantermcap(HashTable ht, ScanFunc func, int flags)
{
Param pm = NULL;
int num;
char **capcode, *tcstr, buf[2048], *u;
#ifndef HAVE_NUMCODES
static char *numcodes[] = {
"co", "it", "lh", "lw", "li", "lm", "sg", "ma", "Co", "pa", "MW",
"NC", "Nl", "pb", "vt", "ws", "Yo", "Yp", "Ya", "BT", "Yc", "Yb",
"Yd", "Ye", "Yf", "Yg", "Yh", "Yi", "Yk", "Yj", "Yl", "Ym", "Yn",
NULL};
#endif
#ifndef HAVE_STRCODES
static char *strcodes[] = {
"ac", "bt", "bl", "cr", "ZA", "ZB", "ZC", "ZD", "cs", "rP", "ct",
"MC", "cl", "cb", "ce", "cd", "ch", "CC", "CW", "cm", "do", "ho",
"vi", "le", "CM", "ve", "nd", "ll", "up", "vs", "ZE", "dc", "dl",
"DI", "ds", "DK", "hd", "eA", "as", "SA", "mb", "md", "ti", "dm",
"mh", "ZF", "ZG", "im", "ZH", "ZI", "ZJ", "ZK", "ZL", "mp", "mr",
"mk", "ZM", "so", "ZN", "ZO", "us", "ZP", "SX", "ec", "ae", "RA",
"me", "te", "ed", "ZQ", "ei", "ZR", "ZS", "ZT", "ZU", "se", "ZV",
"ZW", "ue", "ZX", "RX", "PA", "fh", "vb", "ff", "fs", "WG", "HU",
"i1", "is", "i3", "if", "iP", "Ic", "Ip", "ic", "al", "ip", "K1",
"K3", "K2", "kb", "@1", "kB", "K4", "K5", "@2", "ka", "kC", "@3",
"@4", "@5", "@6", "kt", "kD", "kL", "kd", "kM", "@7", "@8", "kE",
"kS", "@9", "k0", "k1", "k;", "F1", "F2", "F3", "F4", "F5", "F6",
"F7", "F8", "F9", "k2", "FA", "FB", "FC", "FD", "FE", "FF", "FG",
"FH", "FI", "FJ", "k3", "FK", "FL", "FM", "FN", "FO", "FP", "FQ",
"FR", "FS", "FT", "k4", "FU", "FV", "FW", "FX", "FY", "FZ", "Fa",
"Fb", "Fc", "Fd", "k5", "Fe", "Ff", "Fg", "Fh", "Fi", "Fj", "Fk",
"Fl", "Fm", "Fn", "k6", "Fo", "Fp", "Fq", "Fr", "k7", "k8", "k9",
"@0", "%1", "kh", "kI", "kA", "kl", "kH", "%2", "%3", "%4", "%5",
"kN", "%6", "%7", "kP", "%8", "%9", "%0", "&1", "&2", "&3", "&4",
"&5", "kr", "&6", "&9", "&0", "*1", "*2", "*3", "*4", "*5", "*6",
"*7", "*8", "*9", "kF", "*0", "#1", "#2", "#3", "#4", "%a", "%b",
"%c", "%d", "%e", "%f", "kR", "%g", "%h", "%i", "%j", "!1", "!2",
"kT", "!3", "&7", "&8", "ku", "ke", "ks", "l0", "l1", "la", "l2",
"l3", "l4", "l5", "l6", "l7", "l8", "l9", "Lf", "LF", "LO", "mo",
"mm", "ZY", "ZZ", "Za", "Zb", "Zc", "Zd", "nw", "Ze", "oc", "op",
"pc", "DC", "DL", "DO", "Zf", "IC", "SF", "AL", "LE", "Zg", "RI",
"Zh", "SR", "UP", "Zi", "pk", "pl", "px", "pn", "ps", "pO", "pf",
"po", "PU", "QD", "RC", "rp", "RF", "r1", "r2", "r3", "rf", "rc",
"cv", "sc", "sf", "sr", "Zj", "sa", "Sb", "Zk", "Zl", "SC", "sp",
"Sf", "ML", "Zm", "MR", "Zn", "st", "Zo", "Zp", "wi", "Zq", "Zr",
"Zs", "Zt", "Zu", "Zv", "ta", "Zw", "ts", "TO", "uc", "hu", "u0",
"u1", "u2", "u3", "u4", "u5", "u6", "u7", "u8", "u9", "WA", "XF",
"XN", "Zx", "S8", "Yv", "Zz", "Xy", "Zy", "ci", "Yw", "Yx", "dv",
"S1", "Yy", "S2", "S4", "S3", "S5", "Gm", "Km", "Mi", "S6", "xl",
"RQ", "S7", "s0", "s1", "s2", "s3", "AB", "AF", "Yz", "ML", "YZ",
"MT", "Xh", "Xl", "Xo", "Xr", "Xt", "Xv", "sA", "sL", NULL};
#endif
pm = (Param) zhalloc(sizeof(struct param));
pm->sets.cfn = NULL;
pm->gets.cfn = strgetfn;
pm->sets.ifn = NULL;
pm->gets.ifn = intgetfn;
pm->unsetfn = NULL;
pm->ct = 0;
pm->env = NULL;
pm->ename = NULL;
pm->old = NULL;
u = buf;
pm->flags = PM_READONLY | PM_SCALAR;
for (capcode = (char **)boolcodes; *capcode; capcode++) {
if ((num = ztgetflag(*capcode)) != -1) {
pm->u.str = num ? dupstring("yes") : dupstring("no");
pm->nam = dupstring(*capcode);
func((HashNode) pm, flags);
}
}
pm->flags = PM_READONLY | PM_INTEGER;
for (capcode = (char **)numcodes; *capcode; capcode++) {
if ((num = tgetnum(*capcode)) != -1) {
pm->u.val = num;
pm->nam = dupstring(*capcode);
func((HashNode) pm, flags);
}
}
pm->flags = PM_READONLY | PM_SCALAR;
for (capcode = (char **)strcodes; *capcode; capcode++) {
if ((tcstr = (char *)tgetstr(*capcode,&u)) != NULL &&
tcstr != (char *)-1) {
pm->u.str = dupstring(tcstr);
pm->nam = dupstring(*capcode);
func((HashNode) pm, flags);
}
}
}
/**/
#endif /* HAVE_TGETENT */
/**/
int
setup_(Module m)
{
return 0;
}
/**/
int
boot_(Module m)
{
#ifdef HAVE_TGETENT
# ifdef HAVE_SETUPTERM
setupterm((char *)0, 1, (int *)0);
# endif
if (!createtchash())
return 1;
#else
unsetparam(termcap_nam);
#endif
return !addbuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab));
}
/**/
int
cleanup_(Module m)
{
#ifdef HAVE_TGETENT
Param pm;
if ((pm = (Param) paramtab->getnode(paramtab, termcap_nam)) &&
pm == termcap_pm) {
pm->flags &= ~PM_READONLY;
unsetparam_pm(pm, 0, 1);
}
#endif
deletebuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab));
return 0;
}
/**/
int
finish_(Module m)
{
return 0;
}
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