1 /* Filename-seen cache for the GNU debugger, GDB. 2 3 Copyright (C) 1986-2020 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 "defs.h" 21 #include "filename-seen-cache.h" 22 #include "filenames.h" 23 24 /* Initial size of the table. It automagically grows from here. */ 25 #define INITIAL_FILENAME_SEEN_CACHE_SIZE 100 26 27 /* filename_seen_cache constructor. */ 28 29 filename_seen_cache::filename_seen_cache () 30 { 31 m_tab = htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE, 32 filename_hash, filename_eq, 33 NULL, xcalloc, xfree); 34 } 35 36 /* See filename-seen-cache.h. */ 37 38 void 39 filename_seen_cache::clear () 40 { 41 htab_empty (m_tab); 42 } 43 44 /* See filename-seen-cache.h. */ 45 46 filename_seen_cache::~filename_seen_cache () 47 { 48 htab_delete (m_tab); 49 } 50 51 /* See filename-seen-cache.h. */ 52 53 bool 54 filename_seen_cache::seen (const char *file) 55 { 56 void **slot; 57 58 /* Is FILE in tab? */ 59 slot = htab_find_slot (m_tab, file, INSERT); 60 if (*slot != NULL) 61 return true; 62 63 /* No; add it to tab. */ 64 *slot = (char *) file; 65 return false; 66 } 67