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https://github.com/Aigor44/ncursesw-morphos.git
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291 lines
8.9 KiB
C
291 lines
8.9 KiB
C
/****************************************************************************
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* Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. *
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* *
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* Permission is hereby granted, free of charge, to any person obtaining a *
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* copy of this software and associated documentation files (the *
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* "Software"), to deal in the Software without restriction, including *
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* without limitation the rights to use, copy, modify, merge, publish, *
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* distribute, distribute with modifications, sublicense, and/or sell *
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* copies of the Software, and to permit persons to whom the Software is *
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* furnished to do so, subject to the following conditions: *
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* *
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* The above copyright notice and this permission notice shall be included *
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* in all copies or substantial portions of the Software. *
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* *
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
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* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
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* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
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* *
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* Except as contained in this notice, the name(s) of the above copyright *
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* holders shall not be used in advertising or otherwise to promote the *
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* sale, use or other dealings in this Software without prior written *
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* authorization. *
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****************************************************************************/
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/****************************************************************************
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* Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 *
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* and: Eric S. Raymond <esr@snark.thyrsus.com> *
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* and: Thomas E. Dickey 1996-on *
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* *
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* some of the code in here was contributed by: *
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* Magnus Bengtsson, d6mbeng@dtek.chalmers.se (Nov'93) *
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* (but it has changed a lot) *
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****************************************************************************/
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#define __INTERNAL_CAPS_VISIBLE
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#include <curses.priv.h>
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#include <termcap.h>
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#include <tic.h>
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#include <ctype.h>
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#include <term_entry.h>
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MODULE_ID("$Id: lib_termcap.c,v 1.58 2006/09/02 19:39:46 Miroslav.Lichvar Exp $")
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NCURSES_EXPORT_VAR(char *) UP = 0;
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NCURSES_EXPORT_VAR(char *) BC = 0;
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typedef struct {
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long sequence;
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char *fix_sgr0; /* this holds the filtered sgr0 string */
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char *last_bufp; /* help with fix_sgr0 leak */
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TERMINAL *last_term;
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} CACHE;
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#define MAX_CACHE 4
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static CACHE cache[MAX_CACHE];
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static int in_cache = 0;
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#define FIX_SGR0 cache[in_cache].fix_sgr0
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#define LAST_TRM cache[in_cache].last_term
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#define LAST_BUF cache[in_cache].last_bufp
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#define LAST_SEQ cache[in_cache].sequence
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/***************************************************************************
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*
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* tgetent(bufp, term)
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*
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* In termcap, this function reads in the entry for terminal `term' into the
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* buffer pointed to by bufp. It must be called before any of the functions
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* below are called.
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* In this terminfo emulation, tgetent() simply calls setupterm() (which
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* does a bit more than tgetent() in termcap does), and returns its return
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* value (1 if successful, 0 if no terminal with the given name could be
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* found, or -1 if no terminal descriptions have been installed on the
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* system). The bufp argument is ignored.
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*
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***************************************************************************/
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NCURSES_EXPORT(int)
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tgetent(char *bufp, const char *name)
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{
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static long sequence;
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int errcode;
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int n;
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bool found_cache = FALSE;
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START_TRACE();
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T((T_CALLED("tgetent()")));
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_nc_setupterm((NCURSES_CONST char *) name, STDOUT_FILENO, &errcode, TRUE);
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/*
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* In general we cannot tell if the fixed sgr0 is still used by the
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* caller, but if tgetent() is called with the same buffer, that is
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* good enough, since the previous data would be invalidated by the
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* current call.
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*/
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for (n = 0; n < MAX_CACHE; ++n) {
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bool same_result = (bufp != 0 && cache[n].last_bufp == bufp);
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if (same_result) {
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in_cache = n;
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if (FIX_SGR0 != 0) {
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FreeAndNull(FIX_SGR0);
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}
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/*
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* Also free the terminfo data that we loaded (much bigger leak).
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*/
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if (LAST_TRM != 0 && LAST_TRM != cur_term) {
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TERMINAL *trm = LAST_TRM;
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del_curterm(LAST_TRM);
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for (in_cache = 0; in_cache < MAX_CACHE; ++in_cache)
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if (LAST_TRM == trm)
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LAST_TRM = 0;
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in_cache = n;
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}
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found_cache = TRUE;
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break;
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}
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}
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if (!found_cache) {
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int best = 0;
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for (in_cache = 0; in_cache < MAX_CACHE; ++in_cache) {
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if (LAST_SEQ < cache[best].sequence) {
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best = in_cache;
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}
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}
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in_cache = best;
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}
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LAST_TRM = cur_term;
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LAST_SEQ = ++sequence;
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PC = 0;
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UP = 0;
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BC = 0;
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FIX_SGR0 = 0; /* don't free it - application may still use */
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if (errcode == 1) {
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if (cursor_left)
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if ((backspaces_with_bs = !strcmp(cursor_left, "\b")) == 0)
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backspace_if_not_bs = cursor_left;
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/* we're required to export these */
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if (pad_char != NULL)
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PC = pad_char[0];
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if (cursor_up != NULL)
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UP = cursor_up;
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if (backspace_if_not_bs != NULL)
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BC = backspace_if_not_bs;
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if ((FIX_SGR0 = _nc_trim_sgr0(&(cur_term->type))) != 0) {
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if (!strcmp(FIX_SGR0, exit_attribute_mode)) {
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if (FIX_SGR0 != exit_attribute_mode) {
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free(FIX_SGR0);
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}
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FIX_SGR0 = 0;
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}
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}
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LAST_BUF = bufp;
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(void) baudrate(); /* sets ospeed as a side-effect */
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/* LINT_PREPRO
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#if 0*/
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#include <capdefaults.c>
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/* LINT_PREPRO
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#endif*/
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}
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returnCode(errcode);
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}
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/***************************************************************************
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*
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* tgetflag(str)
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*
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* Look up boolean termcap capability str and return its value (TRUE=1 if
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* present, FALSE=0 if not).
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*
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***************************************************************************/
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NCURSES_EXPORT(int)
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tgetflag(NCURSES_CONST char *id)
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{
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unsigned i;
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T((T_CALLED("tgetflag(%s)"), id));
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if (cur_term != 0) {
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TERMTYPE *tp = &(cur_term->type);
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for_each_boolean(i, tp) {
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const char *capname = ExtBoolname(tp, i, boolcodes);
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if (!strncmp(id, capname, 2)) {
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/* setupterm forces invalid booleans to false */
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returnCode(tp->Booleans[i]);
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}
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}
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}
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returnCode(0); /* Solaris does this */
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}
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/***************************************************************************
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*
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* tgetnum(str)
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*
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* Look up numeric termcap capability str and return its value, or -1 if
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* not given.
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*
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***************************************************************************/
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NCURSES_EXPORT(int)
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tgetnum(NCURSES_CONST char *id)
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{
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unsigned i;
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T((T_CALLED("tgetnum(%s)"), id));
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if (cur_term != 0) {
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TERMTYPE *tp = &(cur_term->type);
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for_each_number(i, tp) {
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const char *capname = ExtNumname(tp, i, numcodes);
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if (!strncmp(id, capname, 2)) {
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if (!VALID_NUMERIC(tp->Numbers[i]))
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returnCode(ABSENT_NUMERIC);
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returnCode(tp->Numbers[i]);
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}
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}
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}
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returnCode(ABSENT_NUMERIC);
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}
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/***************************************************************************
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*
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* tgetstr(str, area)
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*
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* Look up string termcap capability str and return a pointer to its value,
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* or NULL if not given.
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*
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***************************************************************************/
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NCURSES_EXPORT(char *)
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tgetstr(NCURSES_CONST char *id, char **area)
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{
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unsigned i;
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char *result = NULL;
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T((T_CALLED("tgetstr(%s,%p)"), id, area));
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if (cur_term != 0) {
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TERMTYPE *tp = &(cur_term->type);
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for_each_string(i, tp) {
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const char *capname = ExtStrname(tp, i, strcodes);
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if (!strncmp(id, capname, 2)) {
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result = tp->Strings[i];
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TR(TRACE_DATABASE, ("found match : %s", _nc_visbuf(result)));
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/* setupterm forces canceled strings to null */
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if (VALID_STRING(result)) {
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if (result == exit_attribute_mode
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&& FIX_SGR0 != 0) {
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result = FIX_SGR0;
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TR(TRACE_DATABASE, ("altered to : %s", _nc_visbuf(result)));
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}
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if (area != 0
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&& *area != 0) {
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(void) strcpy(*area, result);
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result = *area;
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*area += strlen(*area) + 1;
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}
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}
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break;
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}
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}
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}
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returnPtr(result);
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}
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#if NO_LEAKS
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NCURSES_EXPORT(void)
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_nc_tgetent_leaks(void)
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{
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for (in_cache = 0; in_cache < MAX_CACHE; ++in_cache) {
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FreeIfNeeded(FIX_SGR0);
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del_curterm(LAST_TRM);
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}
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}
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#endif
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