ncurses/tinfo/entries.c

   1 /****************************************************************************
   2  * Copyright (c) 2006-2017,2019 Free Software Foundation, Inc.              *
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   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  *
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  21  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.                               *
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  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: Thomas E. Dickey                                                *
  31  *     and: Juergen Pfeifer                                                 *
  32  ****************************************************************************/
  33
  34 #include <curses.priv.h>
  35
  36 #include <ctype.h>
  37
  38 #include <tic.h>
  39
  40 MODULE_ID("$Id: entries.c,v 1.29 2019/12/15 00:18:03 tom Exp $")
  41
  42 /****************************************************************************
  43  *
  44  * Entry queue handling
  45  *
  46  ****************************************************************************/
  47 /*
  48  *  The entry list is a doubly linked list with NULLs terminating the lists:
  49  *
  50  *        ---------   ---------   ---------
  51  *        |       |   |       |   |       |   offset
  52  *        |-------|   |-------|   |-------|
  53  *        |   ----+-->|   ----+-->|  NULL |   next
  54  *        |-------|   |-------|   |-------|
  55  *        |  NULL |<--+----   |<--+----   |   last
  56  *        ---------   ---------   ---------
  57  *            ^                       ^
  58  *            |                       |
  59  *            |                       |
  60  *         _nc_head                _nc_tail
  61  */
  62
  63 NCURSES_EXPORT_VAR(ENTRY *) _nc_head = 0;
  64 NCURSES_EXPORT_VAR(ENTRY *) _nc_tail = 0;
  65
  66 static ENTRY *
  67 _nc_delink_entry(ENTRY * headp, TERMTYPE2 *tterm)
  68 /* delink the allocated storage for the given list entry */
  69 {
  70     ENTRY *ep, *last;
  71
  72     for (last = 0, ep = headp; ep != 0; last = ep, ep = ep->next) {
  73         if (&(ep->tterm) == tterm) {
  74             if (last != 0) {
  75                 last->next = ep->next;
  76             }
  77             if (ep->next != 0) {
  78                 ep->next->last = last;
  79             }
  80             if (ep == _nc_head) {
  81                 _nc_head = ep->next;
  82             }
  83             if (ep == _nc_tail) {
  84                 _nc_tail = last;
  85             }
  86             break;
  87         }
  88     }
  89     return ep;
  90 }
  91
  92 NCURSES_EXPORT(void)
  93 _nc_free_entry(ENTRY * headp, TERMTYPE2 *tterm)
  94 /* free the allocated storage consumed by the given list entry */
  95 {
  96     ENTRY *ep;
  97
  98     if ((ep = _nc_delink_entry(headp, tterm)) != 0) {
  99         free(ep);
 100     }
 101 }
 102
 103 NCURSES_EXPORT(void)
 104 _nc_free_entries(ENTRY * headp)
 105 /* free the allocated storage consumed by list entries */
 106 {
 107     (void) headp;               /* unused - _nc_head is altered here! */
 108
 109     while (_nc_head != 0) {
 110         _nc_free_termtype2(&(_nc_head->tterm));
 111     }
 112 }
 113
 114 NCURSES_EXPORT(void)
 115 _nc_leaks_tinfo(void)
 116 {
 117 #if NO_LEAKS
 118     char *s;
 119 #endif
 120
 121     T((T_CALLED("_nc_free_tinfo()")));
 122 #if NO_LEAKS
 123     _nc_globals.leak_checking = TRUE;
 124     _nc_free_tparm();
 125     _nc_tgetent_leaks();
 126
 127     if (TerminalOf(CURRENT_SCREEN) != 0) {
 128         del_curterm(TerminalOf(CURRENT_SCREEN));
 129     }
 130     _nc_forget_prescr();
 131
 132     _nc_comp_captab_leaks();
 133     _nc_comp_userdefs_leaks();
 134     _nc_free_entries(_nc_head);
 135     _nc_get_type(0);
 136     _nc_first_name(0);
 137     _nc_db_iterator_leaks();
 138     _nc_keyname_leaks();
 139 #if BROKEN_LINKER || USE_REENTRANT
 140     _nc_names_leaks();
 141     _nc_codes_leaks();
 142     FreeIfNeeded(_nc_prescreen.real_acs_map);
 143 #endif
 144     _nc_comp_error_leaks();
 145
 146     if ((s = _nc_home_terminfo()) != 0)
 147         free(s);
 148
 149 #ifdef TRACE
 150     T((T_RETURN("")));
 151     curses_trace(0);
 152     _nc_trace_buf(-1, (size_t) 0);
 153 #endif
 154
 155 #endif /* NO_LEAKS */
 156     returnVoid;
 157 }
 158
 159 #if NO_LEAKS
 160 NCURSES_EXPORT(void)
 161 _nc_free_tinfo(int code)
 162 {
 163     _nc_leaks_tinfo();
 164     exit(code);
 165 }
 166 #endif
 167
 168 NCURSES_EXPORT(void)
 169 exit_terminfo(int code)
 170 {
 171 #if NO_LEAKS
 172     _nc_leaks_tinfo();
 173 #endif
 174     exit(code);
 175 }