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791eb0c01a
As the FSF advises, 'There is no legal significance to using the three-character sequence “(C)”, but it does no harm.' It does take up space though! For that reason, we remove it here from our C files.
109 lines
2.4 KiB
C
109 lines
2.4 KiB
C
/* Copyright 1995-1996,1998-2001,2003,2006,2008-2009,2011,2018
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* Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <stdio.h>
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#include "gc.h"
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#include "chooks.h"
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/* C level hooks
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*
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*/
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/* Hint for `scm_gc_malloc ()' and friends. */
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static const char hook_entry_gc_hint[] = "hook entry";
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void
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scm_c_hook_init (scm_t_c_hook *hook, void *hook_data, scm_t_c_hook_type type)
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{
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hook->first = 0;
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hook->type = type;
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hook->data = hook_data;
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}
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void
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scm_c_hook_add (scm_t_c_hook *hook,
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scm_t_c_hook_function func,
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void *fn_data,
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int appendp)
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{
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scm_t_c_hook_entry *entry;
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scm_t_c_hook_entry **loc = &hook->first;
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entry = scm_gc_malloc (sizeof (scm_t_c_hook_entry), hook_entry_gc_hint);
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if (appendp)
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while (*loc)
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loc = &(*loc)->next;
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entry->next = *loc;
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entry->func = func;
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entry->data = fn_data;
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*loc = entry;
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}
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void
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scm_c_hook_remove (scm_t_c_hook *hook,
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scm_t_c_hook_function func,
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void *fn_data)
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{
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scm_t_c_hook_entry **loc = &hook->first;
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while (*loc)
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{
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if ((*loc)->func == func && (*loc)->data == fn_data)
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{
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*loc = (*loc)->next;
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return;
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}
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loc = &(*loc)->next;
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}
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fprintf (stderr, "Attempt to remove non-existent hook function\n");
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abort ();
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}
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void *
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scm_c_hook_run (scm_t_c_hook *hook, void *data)
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{
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scm_t_c_hook_entry *entry = hook->first;
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scm_t_c_hook_type type = hook->type;
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void *res = 0;
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while (entry)
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{
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res = (entry->func) (hook->data, entry->data, data);
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if (res)
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{
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if (type == SCM_C_HOOK_OR)
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break;
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}
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else
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{
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if (type == SCM_C_HOOK_AND)
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break;
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}
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entry = entry->next;
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}
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return res;
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}
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