/**************************************************************************** * Copyright (c) 1998,1999,2000,2001 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> * * * * some of the code in here was contributed by: * * Magnus Bengtsson, d6mbeng@dtek.chalmers.se (Nov'93) * ****************************************************************************/ #include <curses.priv.h> #include <termcap.h> #include <tic.h> #include <ctype.h> #define __INTERNAL_CAPS_VISIBLE #include <term_entry.h> MODULE_ID("$Id: lib_termcap.c,v 1.1.1.1 2001/11/29 20:40:57 jevans Exp $") #define CSI 233 #define ESC 033 /* ^[ */ #define L_BRACK '[' #define SHIFT_OUT 017 /* ^N */ NCURSES_EXPORT_VAR(char *) UP = 0; NCURSES_EXPORT_VAR(char *) BC = 0; static char *fix_me = 0; static char * set_attribute_9(int flag) { const char *result; if ((result = tparm(set_attributes, 0, 0, 0, 0, 0, 0, 0, 0, flag)) == 0) result = ""; return strdup(result); } static int is_csi(char *s) { if (UChar(s[0]) == CSI) return 1; else if (s[0] == ESC && s[1] == L_BRACK) return 2; return 0; } static char * skip_zero(char *s) { if (s[0] == '0') { if (s[1] == ';') s += 2; else if (isalpha(UChar(s[1]))) s += 1; } return s; } static bool similar_sgr(char *a, char *b) { int csi_a = is_csi(a); int csi_b = is_csi(b); if (csi_a != 0 && csi_b != 0 && csi_a == csi_b) { a += csi_a; b += csi_b; if (*a != *b) { a = skip_zero(a); b = skip_zero(b); } } return strcmp(a, b) == 0; } /*************************************************************************** * * 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 GCC_UNUSED, const char *name) { int errcode; T((T_CALLED("tgetent()"))); setupterm((NCURSES_CONST char *) name, STDOUT_FILENO, &errcode); PC = 0; UP = 0; BC = 0; fix_me = 0; if (errcode == 1) { if (cursor_left) if ((backspaces_with_bs = !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; /* * While 'sgr0' is the "same" as termcap 'me', there is a compatibility * issue. The sgr/sgr0 capabilities include setting/clearing alternate * character set mode. A termcap application cannot use sgr, so sgr0 * strings that reset alternate character set mode will be * misinterpreted. Here, we remove those from the more common * ISO/ANSI/VT100 entries, which have sgr0 agreeing with sgr. */ if (exit_attribute_mode != 0 && set_attributes != 0) { char *on = set_attribute_9(1); char *off = set_attribute_9(0); char *tmp; size_t i, j, k; if (similar_sgr(off, exit_attribute_mode) && !similar_sgr(off, on)) { TR(TRACE_DATABASE, ("adjusting sgr0 : %s", _nc_visbuf(off))); FreeIfNeeded(fix_me); fix_me = off; for (i = 0; off[i] != '\0'; ++i) { if (on[i] != off[i]) { j = strlen(off); k = strlen(on); while (j != 0 && k != 0 && off[j - 1] == on[k - 1]) { --j, --k; } while (off[j] != '\0') { off[i++] = off[j++]; } off[i] = '\0'; break; } } /* SGR 10 would reset to normal font */ if ((i = is_csi(off)) != 0 && off[strlen(off) - 1] == 'm') { tmp = skip_zero(off + i); if (tmp[0] == '1' && skip_zero(tmp + 1) != tmp + 1) { i = tmp - off; if (off[i - 1] == ';') i--; j = skip_zero(tmp + 1) - off; while (off[j] != '\0') { off[i++] = off[j++]; } off[i] = '\0'; } } TR(TRACE_DATABASE, ("...adjusted me : %s", _nc_visbuf(fix_me))); if (!strcmp(fix_me, exit_attribute_mode)) { TR(TRACE_DATABASE, ("...same result, discard")); free(fix_me); fix_me = 0; } } free(on); } (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) { int 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) { int 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) { int 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_me != 0) { result = fix_me; TR(TRACE_DATABASE, ("altered to : %s", _nc_visbuf(result))); } if (area != 0 && *area != 0) { (void) strcpy(*area, result); *area += strlen(*area) + 1; } } break; } } } returnPtr(result); }