| /**************************************************************************** |
| * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * |
| * * |
| * Permission is hereby granted, free of charge, to any person obtaining a * |
| * copy of this software and associated documentation files (the * |
| * "Software"), to deal in the Software without restriction, including * |
| * without limitation the rights to use, copy, modify, merge, publish, * |
| * distribute, distribute with modifications, sublicense, and/or sell * |
| * copies of the Software, and to permit persons to whom the Software is * |
| * furnished to do so, subject to the following conditions: * |
| * * |
| * The above copyright notice and this permission notice shall be included * |
| * in all copies or substantial portions of the Software. * |
| * * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * |
| * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * |
| * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * |
| * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * |
| * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * |
| * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * |
| * * |
| * Except as contained in this notice, the name(s) of the above copyright * |
| * holders shall not be used in advertising or otherwise to promote the * |
| * sale, use or other dealings in this Software without prior written * |
| * authorization. * |
| ****************************************************************************/ |
| |
| /**************************************************************************** |
| * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * |
| * and: Eric S. Raymond <esr@snark.thyrsus.com> * |
| * and: Thomas E. Dickey 1996-on * |
| * * |
| * some of the code in here was contributed by: * |
| * Magnus Bengtsson, d6mbeng@dtek.chalmers.se (Nov'93) * |
| * (but it has changed a lot) * |
| ****************************************************************************/ |
| |
| #define __INTERNAL_CAPS_VISIBLE |
| #include <curses.priv.h> |
| |
| #include <termcap.h> |
| #include <tic.h> |
| #include <ctype.h> |
| |
| #include <term_entry.h> |
| |
| MODULE_ID("$Id: lib_termcap.c,v 1.63 2008/08/16 19:22:55 tom Exp $") |
| |
| NCURSES_EXPORT_VAR(char *) UP = 0; |
| NCURSES_EXPORT_VAR(char *) BC = 0; |
| |
| #define MyCache _nc_globals.tgetent_cache |
| #define CacheInx _nc_globals.tgetent_index |
| #define CacheSeq _nc_globals.tgetent_sequence |
| |
| #define FIX_SGR0 MyCache[CacheInx].fix_sgr0 |
| #define LAST_TRM MyCache[CacheInx].last_term |
| #define LAST_BUF MyCache[CacheInx].last_bufp |
| #define LAST_USE MyCache[CacheInx].last_used |
| #define LAST_SEQ MyCache[CacheInx].sequence |
| |
| /*************************************************************************** |
| * |
| * tgetent(bufp, term) |
| * |
| * In termcap, this function reads in the entry for terminal `term' into the |
| * buffer pointed to by bufp. It must be called before any of the functions |
| * below are called. |
| * In this terminfo emulation, tgetent() simply calls setupterm() (which |
| * does a bit more than tgetent() in termcap does), and returns its return |
| * value (1 if successful, 0 if no terminal with the given name could be |
| * found, or -1 if no terminal descriptions have been installed on the |
| * system). The bufp argument is ignored. |
| * |
| ***************************************************************************/ |
| |
| NCURSES_EXPORT(int) |
| tgetent(char *bufp, const char *name) |
| { |
| int errcode; |
| int n; |
| bool found_cache = FALSE; |
| |
| START_TRACE(); |
| T((T_CALLED("tgetent()"))); |
| |
| _nc_setupterm((NCURSES_CONST char *) name, STDOUT_FILENO, &errcode, TRUE); |
| |
| /* |
| * In general we cannot tell if the fixed sgr0 is still used by the |
| * caller, but if tgetent() is called with the same buffer, that is |
| * good enough, since the previous data would be invalidated by the |
| * current call. |
| * |
| * bufp may be a null pointer, e.g., GNU termcap. That allocates data, |
| * which is good until the next tgetent() call. The conventional termcap |
| * is inconvenient because of the fixed buffer size, but because it uses |
| * caller-supplied buffers, can have multiple terminal descriptions in |
| * use at a given time. |
| */ |
| for (n = 0; n < TGETENT_MAX; ++n) { |
| bool same_result = (MyCache[n].last_used && MyCache[n].last_bufp == bufp); |
| if (same_result) { |
| CacheInx = n; |
| if (FIX_SGR0 != 0) { |
| FreeAndNull(FIX_SGR0); |
| } |
| /* |
| * Also free the terminfo data that we loaded (much bigger leak). |
| */ |
| if (LAST_TRM != 0 && LAST_TRM != cur_term) { |
| TERMINAL *trm = LAST_TRM; |
| del_curterm(LAST_TRM); |
| for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx) |
| if (LAST_TRM == trm) |
| LAST_TRM = 0; |
| CacheInx = n; |
| } |
| found_cache = TRUE; |
| break; |
| } |
| } |
| if (!found_cache) { |
| int best = 0; |
| |
| for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx) { |
| if (LAST_SEQ < MyCache[best].sequence) { |
| best = CacheInx; |
| } |
| } |
| CacheInx = best; |
| } |
| LAST_TRM = cur_term; |
| LAST_SEQ = ++CacheSeq; |
| |
| PC = 0; |
| UP = 0; |
| BC = 0; |
| FIX_SGR0 = 0; /* don't free it - application may still use */ |
| |
| if (errcode == 1) { |
| |
| if (cursor_left) |
| if ((backspaces_with_bs = (char) !strcmp(cursor_left, "\b")) == 0) |
| backspace_if_not_bs = cursor_left; |
| |
| /* we're required to export these */ |
| if (pad_char != NULL) |
| PC = pad_char[0]; |
| if (cursor_up != NULL) |
| UP = cursor_up; |
| if (backspace_if_not_bs != NULL) |
| BC = backspace_if_not_bs; |
| |
| if ((FIX_SGR0 = _nc_trim_sgr0(&(cur_term->type))) != 0) { |
| if (!strcmp(FIX_SGR0, exit_attribute_mode)) { |
| if (FIX_SGR0 != exit_attribute_mode) { |
| free(FIX_SGR0); |
| } |
| FIX_SGR0 = 0; |
| } |
| } |
| LAST_BUF = bufp; |
| LAST_USE = TRUE; |
| |
| SetNoPadding(SP); |
| (void) baudrate(); /* sets ospeed as a side-effect */ |
| |
| /* LINT_PREPRO |
| #if 0*/ |
| #include <capdefaults.c> |
| /* LINT_PREPRO |
| #endif*/ |
| |
| } |
| returnCode(errcode); |
| } |
| |
| /*************************************************************************** |
| * |
| * tgetflag(str) |
| * |
| * Look up boolean termcap capability str and return its value (TRUE=1 if |
| * present, FALSE=0 if not). |
| * |
| ***************************************************************************/ |
| |
| NCURSES_EXPORT(int) |
| tgetflag(NCURSES_CONST char *id) |
| { |
| unsigned i; |
| |
| T((T_CALLED("tgetflag(%s)"), id)); |
| if (cur_term != 0) { |
| TERMTYPE *tp = &(cur_term->type); |
| for_each_boolean(i, tp) { |
| const char *capname = ExtBoolname(tp, i, boolcodes); |
| if (!strncmp(id, capname, 2)) { |
| /* setupterm forces invalid booleans to false */ |
| returnCode(tp->Booleans[i]); |
| } |
| } |
| } |
| returnCode(0); /* Solaris does this */ |
| } |
| |
| /*************************************************************************** |
| * |
| * tgetnum(str) |
| * |
| * Look up numeric termcap capability str and return its value, or -1 if |
| * not given. |
| * |
| ***************************************************************************/ |
| |
| NCURSES_EXPORT(int) |
| tgetnum(NCURSES_CONST char *id) |
| { |
| unsigned i; |
| |
| T((T_CALLED("tgetnum(%s)"), id)); |
| if (cur_term != 0) { |
| TERMTYPE *tp = &(cur_term->type); |
| for_each_number(i, tp) { |
| const char *capname = ExtNumname(tp, i, numcodes); |
| if (!strncmp(id, capname, 2)) { |
| if (!VALID_NUMERIC(tp->Numbers[i])) |
| returnCode(ABSENT_NUMERIC); |
| returnCode(tp->Numbers[i]); |
| } |
| } |
| } |
| returnCode(ABSENT_NUMERIC); |
| } |
| |
| /*************************************************************************** |
| * |
| * tgetstr(str, area) |
| * |
| * Look up string termcap capability str and return a pointer to its value, |
| * or NULL if not given. |
| * |
| ***************************************************************************/ |
| |
| NCURSES_EXPORT(char *) |
| tgetstr(NCURSES_CONST char *id, char **area) |
| { |
| unsigned i; |
| char *result = NULL; |
| |
| T((T_CALLED("tgetstr(%s,%p)"), id, area)); |
| if (cur_term != 0) { |
| TERMTYPE *tp = &(cur_term->type); |
| for_each_string(i, tp) { |
| const char *capname = ExtStrname(tp, i, strcodes); |
| if (!strncmp(id, capname, 2)) { |
| result = tp->Strings[i]; |
| TR(TRACE_DATABASE, ("found match : %s", _nc_visbuf(result))); |
| /* setupterm forces canceled strings to null */ |
| if (VALID_STRING(result)) { |
| if (result == exit_attribute_mode |
| && FIX_SGR0 != 0) { |
| result = FIX_SGR0; |
| TR(TRACE_DATABASE, ("altered to : %s", _nc_visbuf(result))); |
| } |
| if (area != 0 |
| && *area != 0) { |
| (void) strcpy(*area, result); |
| result = *area; |
| *area += strlen(*area) + 1; |
| } |
| } |
| break; |
| } |
| } |
| } |
| returnPtr(result); |
| } |
| |
| #if NO_LEAKS |
| NCURSES_EXPORT(void) |
| _nc_tgetent_leaks(void) |
| { |
| for (CacheInx = 0; CacheInx < TGETENT_MAX; ++CacheInx) { |
| FreeIfNeeded(FIX_SGR0); |
| if (LAST_TRM != 0) |
| del_curterm(LAST_TRM); |
| } |
| } |
| #endif |
