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Add internal hashing API designed for the typelib

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In multiple places in the typelib, but most importantly the directory,
we need some fast indexing.  Perfect hashing, as implemented by CMPH
(previous commit), is an exact fit for the problem domain.

Add an API built on top of CMPH which maps strings->guint16 (we just
need a guint16 for the typelib index).

https://bugzilla.gnome.org/show_bug.cgi?id=554943
This commit is contained in:
Colin Walters
2010-10-25 07:56:05 -04:00
parent abb1b39ce9
commit 409c40f663
3 changed files with 292 additions and 0 deletions
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65
gthash-test.c Normal file
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/* GObject introspection: Test typelib hashing
*
* Copyright (C) 2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <glib-object.h>
#include "gitypelib-internal.h"
static void
test_build_retrieve (void)
{
GITypelibHashBuilder *builder;
guint32 bufsize;
guint8* buf;
builder = _gi_typelib_hash_builder_new ();
_gi_typelib_hash_builder_add_string (builder, "Action", 0);
_gi_typelib_hash_builder_add_string (builder, "ZLibDecompressor", 42);
_gi_typelib_hash_builder_add_string (builder, "VolumeMonitor", 9);
_gi_typelib_hash_builder_add_string (builder, "FileMonitorFlags", 31);
if (!_gi_typelib_hash_builder_prepare (builder))
g_assert_not_reached ();
bufsize = _gi_typelib_hash_builder_get_buffer_size (builder);
buf = g_malloc (bufsize);
_gi_typelib_hash_builder_pack (builder, buf, bufsize);
_gi_typelib_hash_builder_destroy (builder);
g_assert (_gi_typelib_hash_search (buf, "Action") == 0);
g_assert (_gi_typelib_hash_search (buf, "ZLibDecompressor") == 42);
g_assert (_gi_typelib_hash_search (buf, "VolumeMonitor") == 9);
g_assert (_gi_typelib_hash_search (buf, "FileMonitorFlags") == 31);
}
int
main(int argc, char **argv)
{
g_type_init ();
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/gthash/build-retrieve", test_build_retrieve);
return g_test_run ();
}