91 lines
2.0 KiB
C++
91 lines
2.0 KiB
C++
/* Callback management.
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Copyright (C) 2014-2020 Free Software Foundation, Inc.
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This file is part of GCC.
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GCC is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 3, or (at your option) any later
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version.
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GCC is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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for more details.
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You should have received a copy of the GNU General Public License
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along with GCC; see the file COPYING3. If not see
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<http://www.gnu.org/licenses/>. */
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#include <cc1plugin-config.h>
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#include <string.h>
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#include <stdlib.h>
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#include "callbacks.hh"
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#include "libiberty.h"
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// An entry in the hash table.
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struct method
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{
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const char *name;
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cc1_plugin::callback_ftype *func;
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};
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// Hash function for struct method.
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static hashval_t
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hash_method (const void *a)
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{
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const struct method *m = (const struct method *) a;
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return htab_hash_string (m->name);
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}
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// Equality function for struct method.
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static int
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eq_method (const void *a, const void *b)
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{
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const struct method *ma = (const struct method *) a;
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const struct method *mb = (const struct method *) b;
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return strcmp (ma->name, mb->name) == 0;
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}
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cc1_plugin::callbacks::callbacks ()
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: m_registry (htab_create_alloc (10, hash_method, eq_method,
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free, xcalloc, free))
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{
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}
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cc1_plugin::callbacks::~callbacks ()
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{
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htab_delete (m_registry);
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}
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void
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cc1_plugin::callbacks::add_callback (const char *name,
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cc1_plugin::callback_ftype *func)
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{
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method m;
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method **slot;
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m.name = name;
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m.func = func;
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slot = (method **) htab_find_slot (m_registry, &m, INSERT);
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*slot = XNEW (method);
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**slot = m;
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}
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cc1_plugin::callback_ftype *
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cc1_plugin::callbacks::find_callback (const char *name)
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{
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method m, *found;
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m.name = name;
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found = (method *) htab_find (m_registry, &m);
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if (found == NULL)
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return NULL;
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return found->func;
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}
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