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/* Filename-seen cache for the GNU debugger, GDB.
Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "filename-seen-cache.h"
#include "filenames.h"
/* Initial size of the table. It automagically grows from here. */
#define INITIAL_FILENAME_SEEN_CACHE_SIZE 100
/* filename_seen_cache constructor. */
filename_seen_cache::filename_seen_cache ()
: m_tab (htab_create_alloc (INITIAL_FILENAME_SEEN_CACHE_SIZE,
filename_hash, filename_eq,
NULL, xcalloc, xfree))
{
}
/* See filename-seen-cache.h. */
void
filename_seen_cache::clear ()
{
htab_empty (m_tab.get ());
}
/* See filename-seen-cache.h. */
bool
filename_seen_cache::seen (const char *file)
{
void **slot;
/* Is FILE in tab? */
slot = htab_find_slot (m_tab.get (), file, INSERT);
if (*slot != NULL)
return true;
/* No; add it to tab. */
*slot = (char *) file;
return false;
}
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