1 /**************************************************************************** 2 * Copyright (c) 1998-2005,2006 Free Software Foundation, Inc. * 3 * * 4 * Permission is hereby granted, free of charge, to any person obtaining a * 5 * copy of this software and associated documentation files (the * 6 * "Software"), to deal in the Software without restriction, including * 7 * without limitation the rights to use, copy, modify, merge, publish, * 8 * distribute, distribute with modifications, sublicense, and/or sell * 9 * copies of the Software, and to permit persons to whom the Software is * 10 * furnished to do so, subject to the following conditions: * 11 * * 12 * The above copyright notice and this permission notice shall be included * 13 * in all copies or substantial portions of the Software. * 14 * * 15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 16 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 17 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 18 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 22 * * 23 * Except as contained in this notice, the name(s) of the above copyright * 24 * holders shall not be used in advertising or otherwise to promote the * 25 * sale, use or other dealings in this Software without prior written * 26 * authorization. * 27 ****************************************************************************/ 28 29 /**************************************************************************** 30 * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 31 * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32 * and: Thomas E. Dickey 1996-on * 33 * * 34 * some of the code in here was contributed by: * 35 * Magnus Bengtsson, d6mbeng@dtek.chalmers.se (Nov'93) * 36 * (but it has changed a lot) * 37 ****************************************************************************/ 38 39 /* $FreeBSD$ */ 40 41 #define __INTERNAL_CAPS_VISIBLE 42 #include <curses.priv.h> 43 44 #include <termcap.h> 45 #include <tic.h> 46 #include <ctype.h> 47 48 #include <term_entry.h> 49 50 MODULE_ID("$Id: lib_termcap.c,v 1.58 2006/09/02 19:39:46 Miroslav.Lichvar Exp $") 51 52 NCURSES_EXPORT_VAR(char *) UP = 0; 53 NCURSES_EXPORT_VAR(char *) BC = 0; 54 55 #ifdef FREEBSD_NATIVE 56 extern char _nc_termcap[]; /* buffer to copy out */ 57 #endif 58 59 typedef struct { 60 long sequence; 61 char *fix_sgr0; /* this holds the filtered sgr0 string */ 62 char *last_bufp; /* help with fix_sgr0 leak */ 63 TERMINAL *last_term; 64 } CACHE; 65 66 #define MAX_CACHE 4 67 static CACHE cache[MAX_CACHE]; 68 static int in_cache = 0; 69 70 #define FIX_SGR0 cache[in_cache].fix_sgr0 71 #define LAST_TRM cache[in_cache].last_term 72 #define LAST_BUF cache[in_cache].last_bufp 73 #define LAST_SEQ cache[in_cache].sequence 74 75 /*************************************************************************** 76 * 77 * tgetent(bufp, term) 78 * 79 * In termcap, this function reads in the entry for terminal `term' into the 80 * buffer pointed to by bufp. It must be called before any of the functions 81 * below are called. 82 * In this terminfo emulation, tgetent() simply calls setupterm() (which 83 * does a bit more than tgetent() in termcap does), and returns its return 84 * value (1 if successful, 0 if no terminal with the given name could be 85 * found, or -1 if no terminal descriptions have been installed on the 86 * system). The bufp argument is ignored. 87 * 88 ***************************************************************************/ 89 90 NCURSES_EXPORT(int) 91 tgetent(char *bufp, const char *name) 92 { 93 static long sequence; 94 95 int errcode; 96 int n; 97 bool found_cache = FALSE; 98 99 START_TRACE(); 100 T((T_CALLED("tgetent()"))); 101 102 _nc_setupterm((NCURSES_CONST char *) name, STDOUT_FILENO, &errcode, TRUE); 103 104 /* 105 * In general we cannot tell if the fixed sgr0 is still used by the 106 * caller, but if tgetent() is called with the same buffer, that is 107 * good enough, since the previous data would be invalidated by the 108 * current call. 109 */ 110 for (n = 0; n < MAX_CACHE; ++n) { 111 bool same_result = (bufp != 0 && cache[n].last_bufp == bufp); 112 if (same_result) { 113 in_cache = n; 114 if (FIX_SGR0 != 0) { 115 FreeAndNull(FIX_SGR0); 116 } 117 /* 118 * Also free the terminfo data that we loaded (much bigger leak). 119 */ 120 if (LAST_TRM != 0 && LAST_TRM != cur_term) { 121 TERMINAL *trm = LAST_TRM; 122 del_curterm(LAST_TRM); 123 for (in_cache = 0; in_cache < MAX_CACHE; ++in_cache) 124 if (LAST_TRM == trm) 125 LAST_TRM = 0; 126 in_cache = n; 127 } 128 found_cache = TRUE; 129 break; 130 } 131 } 132 if (!found_cache) { 133 int best = 0; 134 135 for (in_cache = 0; in_cache < MAX_CACHE; ++in_cache) { 136 if (LAST_SEQ < cache[best].sequence) { 137 best = in_cache; 138 } 139 } 140 in_cache = best; 141 } 142 LAST_TRM = cur_term; 143 LAST_SEQ = ++sequence; 144 145 PC = 0; 146 UP = 0; 147 BC = 0; 148 FIX_SGR0 = 0; /* don't free it - application may still use */ 149 150 if (errcode == 1) { 151 152 if (cursor_left) 153 if ((backspaces_with_bs = !strcmp(cursor_left, "\b")) == 0) 154 backspace_if_not_bs = cursor_left; 155 156 /* we're required to export these */ 157 if (pad_char != NULL) 158 PC = pad_char[0]; 159 if (cursor_up != NULL) 160 UP = cursor_up; 161 if (backspace_if_not_bs != NULL) 162 BC = backspace_if_not_bs; 163 164 if ((FIX_SGR0 = _nc_trim_sgr0(&(cur_term->type))) != 0) { 165 if (!strcmp(FIX_SGR0, exit_attribute_mode)) { 166 if (FIX_SGR0 != exit_attribute_mode) { 167 free(FIX_SGR0); 168 } 169 FIX_SGR0 = 0; 170 } 171 } 172 LAST_BUF = bufp; 173 174 (void) baudrate(); /* sets ospeed as a side-effect */ 175 176 /* LINT_PREPRO 177 #if 0*/ 178 #include <capdefaults.c> 179 /* LINT_PREPRO 180 #endif*/ 181 182 } 183 184 #ifdef FREEBSD_NATIVE 185 /* 186 * This is a REALLY UGLY hack. Basically, if we originate with 187 * a termcap source, try and copy it out. 188 */ 189 if (bufp && _nc_termcap[0]) 190 strncpy(bufp, _nc_termcap, 1024); 191 #endif 192 193 returnCode(errcode); 194 } 195 196 /*************************************************************************** 197 * 198 * tgetflag(str) 199 * 200 * Look up boolean termcap capability str and return its value (TRUE=1 if 201 * present, FALSE=0 if not). 202 * 203 ***************************************************************************/ 204 205 NCURSES_EXPORT(int) 206 tgetflag(NCURSES_CONST char *id) 207 { 208 unsigned i; 209 210 T((T_CALLED("tgetflag(%s)"), id)); 211 if (cur_term != 0) { 212 TERMTYPE *tp = &(cur_term->type); 213 for_each_boolean(i, tp) { 214 const char *capname = ExtBoolname(tp, i, boolcodes); 215 if (!strncmp(id, capname, 2)) { 216 /* setupterm forces invalid booleans to false */ 217 returnCode(tp->Booleans[i]); 218 } 219 } 220 } 221 returnCode(0); /* Solaris does this */ 222 } 223 224 /*************************************************************************** 225 * 226 * tgetnum(str) 227 * 228 * Look up numeric termcap capability str and return its value, or -1 if 229 * not given. 230 * 231 ***************************************************************************/ 232 233 NCURSES_EXPORT(int) 234 tgetnum(NCURSES_CONST char *id) 235 { 236 unsigned i; 237 238 T((T_CALLED("tgetnum(%s)"), id)); 239 if (cur_term != 0) { 240 TERMTYPE *tp = &(cur_term->type); 241 for_each_number(i, tp) { 242 const char *capname = ExtNumname(tp, i, numcodes); 243 if (!strncmp(id, capname, 2)) { 244 if (!VALID_NUMERIC(tp->Numbers[i])) 245 returnCode(ABSENT_NUMERIC); 246 returnCode(tp->Numbers[i]); 247 } 248 } 249 } 250 returnCode(ABSENT_NUMERIC); 251 } 252 253 /*************************************************************************** 254 * 255 * tgetstr(str, area) 256 * 257 * Look up string termcap capability str and return a pointer to its value, 258 * or NULL if not given. 259 * 260 ***************************************************************************/ 261 262 NCURSES_EXPORT(char *) 263 tgetstr(NCURSES_CONST char *id, char **area) 264 { 265 unsigned i; 266 char *result = NULL; 267 268 T((T_CALLED("tgetstr(%s,%p)"), id, area)); 269 if (cur_term != 0) { 270 TERMTYPE *tp = &(cur_term->type); 271 for_each_string(i, tp) { 272 const char *capname = ExtStrname(tp, i, strcodes); 273 if (!strncmp(id, capname, 2)) { 274 result = tp->Strings[i]; 275 TR(TRACE_DATABASE, ("found match : %s", _nc_visbuf(result))); 276 /* setupterm forces canceled strings to null */ 277 if (VALID_STRING(result)) { 278 if (result == exit_attribute_mode 279 && FIX_SGR0 != 0) { 280 result = FIX_SGR0; 281 TR(TRACE_DATABASE, ("altered to : %s", _nc_visbuf(result))); 282 } 283 if (area != 0 284 && *area != 0) { 285 (void) strcpy(*area, result); 286 result = *area; 287 *area += strlen(*area) + 1; 288 } 289 } 290 break; 291 } 292 } 293 } 294 returnPtr(result); 295 } 296 297 #if NO_LEAKS 298 NCURSES_EXPORT(void) 299 _nc_tgetent_leaks(void) 300 { 301 for (in_cache = 0; in_cache < MAX_CACHE; ++in_cache) { 302 FreeIfNeeded(FIX_SGR0); 303 del_curterm(LAST_TRM); 304 } 305 } 306 #endif 307