1 /****************************************************************************
2 * Copyright (c) 1998-2011,2012 Free Software Foundation, Inc. *
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: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
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. *
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 *
27 ****************************************************************************/
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 ****************************************************************************/
36 * alloc_entry.c -- allocation functions for terminfo entries
46 #include <curses.priv.h>
50 MODULE_ID("$Id: alloc_entry.c,v 1.56 2012/02/22 22:34:31 tom Exp $")
52 #define ABSENT_OFFSET -1
53 #define CANCELLED_OFFSET -2
55 #define MAX_STRTAB 4096 /* documented maximum entry size */
57 static char *stringbuf; /* buffer for string capabilities */
58 static size_t next_free; /* next free character in stringbuf */
61 _nc_init_entry(TERMTYPE *const tp)
62 /* initialize a terminal type data block */
69 FreeAndNull(stringbuf);
76 stringbuf = (char *) malloc((size_t) MAX_STRTAB);
79 tp->num_Booleans = BOOLCOUNT;
80 tp->num_Numbers = NUMCOUNT;
81 tp->num_Strings = STRCOUNT;
86 if (tp->Booleans == 0)
87 tp->Booleans = typeMalloc(NCURSES_SBOOL, BOOLCOUNT);
89 tp->Numbers = typeMalloc(short, NUMCOUNT);
91 tp->Strings = typeMalloc(char *, STRCOUNT);
93 for_each_boolean(i, tp)
94 tp->Booleans[i] = FALSE;
96 for_each_number(i, tp)
97 tp->Numbers[i] = ABSENT_NUMERIC;
99 for_each_string(i, tp)
100 tp->Strings[i] = ABSENT_STRING;
105 NCURSES_EXPORT(ENTRY *)
106 _nc_copy_entry(ENTRY * oldp)
108 ENTRY *newp = typeCalloc(ENTRY, 1);
112 _nc_copy_termtype(&(newp->tterm), &(oldp->tterm));
117 /* save a copy of string in the string buffer */
118 NCURSES_EXPORT(char *)
119 _nc_save_str(const char *const string)
122 size_t old_next_free = next_free;
123 size_t len = strlen(string) + 1;
125 if (len == 1 && next_free != 0) {
127 * Cheat a little by making an empty string point to the end of the
130 if (next_free < MAX_STRTAB) {
131 result = (stringbuf + next_free - 1);
133 } else if (next_free + len < MAX_STRTAB) {
134 _nc_STRCPY(&stringbuf[next_free], string, MAX_STRTAB);
135 DEBUG(7, ("Saved string %s", _nc_visbuf(string)));
136 DEBUG(7, ("at location %d", (int) next_free));
138 result = (stringbuf + old_next_free);
140 _nc_warning("Too much data, some is lost");
146 _nc_wrap_entry(ENTRY * const ep, bool copy_strings)
147 /* copy the string parts to allocated storage, preserving pointers to it */
149 int offsets[MAX_ENTRY_SIZE / sizeof(short)];
150 int useoffsets[MAX_USES];
152 unsigned nuses = ep->nuses;
153 TERMTYPE *tp = &(ep->tterm);
156 next_free = 0; /* clear static storage */
158 /* copy term_names, Strings, uses */
159 tp->term_names = _nc_save_str(tp->term_names);
160 for_each_string(i, tp) {
161 if (tp->Strings[i] != ABSENT_STRING &&
162 tp->Strings[i] != CANCELLED_STRING) {
163 tp->Strings[i] = _nc_save_str(tp->Strings[i]);
167 for (i = 0; i < nuses; i++) {
168 if (ep->uses[i].name == 0) {
169 ep->uses[i].name = _nc_save_str(ep->uses[i].name);
176 assert(tp->term_names >= stringbuf);
177 n = (unsigned) (tp->term_names - stringbuf);
178 for_each_string(i, &(ep->tterm)) {
179 if (i < SIZEOF(offsets)) {
180 if (tp->Strings[i] == ABSENT_STRING) {
181 offsets[i] = ABSENT_OFFSET;
182 } else if (tp->Strings[i] == CANCELLED_STRING) {
183 offsets[i] = CANCELLED_OFFSET;
185 offsets[i] = (int) (tp->Strings[i] - stringbuf);
190 for (i = 0; i < nuses; i++) {
191 if (ep->uses[i].name == 0)
192 useoffsets[i] = ABSENT_OFFSET;
194 useoffsets[i] = (int) (ep->uses[i].name - stringbuf);
197 if ((tp->str_table = typeMalloc(char, next_free)) == (char *) 0)
198 _nc_err_abort(MSG_NO_MEMORY);
199 (void) memcpy(tp->str_table, stringbuf, next_free);
201 tp->term_names = tp->str_table + n;
202 for_each_string(i, &(ep->tterm)) {
203 if (i < SIZEOF(offsets)) {
204 if (offsets[i] == ABSENT_OFFSET) {
205 tp->Strings[i] = ABSENT_STRING;
206 } else if (offsets[i] == CANCELLED_OFFSET) {
207 tp->Strings[i] = CANCELLED_STRING;
209 tp->Strings[i] = tp->str_table + offsets[i];
216 if ((n = (unsigned) NUM_EXT_NAMES(tp)) != 0) {
217 if (n < SIZEOF(offsets)) {
220 for (i = 0; i < n; i++) {
221 length += strlen(tp->ext_Names[i]) + 1;
222 offsets[i] = (int) (tp->ext_Names[i] - stringbuf);
224 if ((tp->ext_str_table = typeMalloc(char, length)) == 0)
225 _nc_err_abort(MSG_NO_MEMORY);
226 for (i = 0, offset = 0; i < n; i++) {
227 tp->ext_Names[i] = tp->ext_str_table + offset;
228 _nc_STRCPY(tp->ext_Names[i],
229 stringbuf + offsets[i],
231 offset += strlen(tp->ext_Names[i]) + 1;
238 for (i = 0; i < nuses; i++) {
239 if (useoffsets[i] == ABSENT_OFFSET)
240 ep->uses[i].name = 0;
242 ep->uses[i].name = (tp->str_table + useoffsets[i]);
247 _nc_merge_entry(TERMTYPE *const to, TERMTYPE *const from)
248 /* merge capabilities from `from' entry into `to' entry */
253 _nc_align_termtype(to, from);
255 for_each_boolean(i, from) {
256 if (to->Booleans[i] != (char) CANCELLED_BOOLEAN) {
257 int mergebool = from->Booleans[i];
259 if (mergebool == CANCELLED_BOOLEAN)
260 to->Booleans[i] = FALSE;
261 else if (mergebool == TRUE)
262 to->Booleans[i] = (char) mergebool;
266 for_each_number(i, from) {
267 if (to->Numbers[i] != CANCELLED_NUMERIC) {
268 short mergenum = from->Numbers[i];
270 if (mergenum == CANCELLED_NUMERIC)
271 to->Numbers[i] = ABSENT_NUMERIC;
272 else if (mergenum != ABSENT_NUMERIC)
273 to->Numbers[i] = mergenum;
278 * Note: the copies of strings this makes don't have their own
279 * storage. This is OK right now, but will be a problem if we
280 * we ever want to deallocate entries.
282 for_each_string(i, from) {
283 if (to->Strings[i] != CANCELLED_STRING) {
284 char *mergestring = from->Strings[i];
286 if (mergestring == CANCELLED_STRING)
287 to->Strings[i] = ABSENT_STRING;
288 else if (mergestring != ABSENT_STRING)
289 to->Strings[i] = mergestring;
296 _nc_alloc_entry_leaks(void)
298 if (stringbuf != 0) {
299 FreeAndNull(stringbuf);