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/* Callback management.
Copyright (C) 2014-2016 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any later
version.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include <cc1plugin-config.h>
#include <string.h>
#include <stdlib.h>
#include "callbacks.hh"
#include "libiberty.h"
// An entry in the hash table.
struct method
{
const char *name;
cc1_plugin::callback_ftype *func;
};
// Hash function for struct method.
static hashval_t
hash_method (const void *a)
{
const struct method *m = (const struct method *) a;
return htab_hash_string (m->name);
}
// Equality function for struct method.
static int
eq_method (const void *a, const void *b)
{
const struct method *ma = (const struct method *) a;
const struct method *mb = (const struct method *) b;
return strcmp (ma->name, mb->name) == 0;
}
cc1_plugin::callbacks::callbacks ()
: m_registry (htab_create_alloc (10, hash_method, eq_method,
free, xcalloc, free))
{
}
cc1_plugin::callbacks::~callbacks ()
{
htab_delete (m_registry);
}
void
cc1_plugin::callbacks::add_callback (const char *name,
cc1_plugin::callback_ftype *func)
{
method m;
method **slot;
m.name = name;
m.func = func;
slot = (method **) htab_find_slot (m_registry, &m, INSERT);
*slot = XNEW (method);
**slot = m;
}
cc1_plugin::callback_ftype *
cc1_plugin::callbacks::find_callback (const char *name)
{
method m, *found;
m.name = name;
found = (method *) htab_find (m_registry, &m);
if (found == NULL)
return NULL;
return found->func;
}
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