gdb/filename-seen-cache.c

   1 /* Filename-seen cache for the GNU debugger, GDB.
   2
   3    Copyright (C) 1986-2024 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #include "filename-seen-cache.h"
  21 #include "filenames.h"
  22
  23   /* Initial size of the table.  It automagically grows from here.  */
  24 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
  25
  26 /* filename_seen_cache constructor.  */
  27
  28 filename_seen_cache::filename_seen_cache ()
  29   : m_tab (htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE,
  30                               filename_hash, filename_eq,
  31                               NULL, xcalloc, xfree))
  32 {
  33 }
  34
  35 /* See filename-seen-cache.h.  */
  36
  37 void
  38 filename_seen_cache::clear ()
  39 {
  40   htab_empty (m_tab.get ());
  41 }
  42
  43 /* See filename-seen-cache.h.  */
  44
  45 bool
  46 filename_seen_cache::seen (const char *file)
  47 {
  48   void **slot;
  49
  50   /* Is FILE in tab?  */
  51   slot = htab_find_slot (m_tab.get (), file, INSERT);
  52   if (*slot != NULL)
  53     return true;
  54
  55   /* No; add it to tab.  */
  56   *slot = (char *) file;
  57   return false;
  58 }