[gnome-builder/wip/highlight] highlight: add overly simplistic index helper

[Christian Hergert <chergert src gnome org>]

commit 2f217650a2ea4337f99bf2a1f7b6fc6225b30a1e
Author: Christian Hergert <christian hergert me>
Date:   Thu Mar 26 13:01:55 2015 -0700

    highlight: add overly simplistic index helper

 libide/Makefile.am           |    2 +
 libide/ide-highlight-index.c |   96 ++++++++++++++++++++++++++++++++++++++++++
 libide/ide-highlight-index.h |   39 +++++++++++++++++
 3 files changed, 137 insertions(+), 0 deletions(-)
---
diff --git a/libide/Makefile.am b/libide/Makefile.am
index 75a5230..31ad112 100644
--- a/libide/Makefile.am
+++ b/libide/Makefile.am
@@ -227,6 +227,8 @@ libide_1_0_la_SOURCES = \
        libide/git/ide-git-search-index.h \
        libide/gsettings/ide-language-defaults.c \
        libide/gsettings/ide-language-defaults.h \
+       libide/ide-highlight-index.c \
+       libide/ide-highlight-index.h \
        libide/ide-async-helper.c \
        libide/ide-async-helper.h \
        libide/ide-battery-monitor.c \
diff --git a/libide/ide-highlight-index.c b/libide/ide-highlight-index.c
new file mode 100644
index 0000000..03e79d6
--- /dev/null
+++ b/libide/ide-highlight-index.c
@@ -0,0 +1,96 @@
+/* ide-highlight-index.c
+ *
+ * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ *
+ * This file 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 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This file 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <sys/user.h>
+
+#include "ide-highlight-index.h"
+
+struct _IdeHighlightIndex
+{
+  volatile gint  ref_count;
+  GStringChunk  *strings;
+  GHashTable    *index;
+};
+
+IdeHighlightIndex *
+ide_highlight_index_new (void)
+{
+  IdeHighlightIndex *ret;
+
+  ret = g_new0 (IdeHighlightIndex, 1);
+  ret->ref_count = 1;
+  ret->strings = g_string_chunk_new (PAGE_SIZE);
+  ret->index = g_hash_table_new (g_str_hash, g_str_equal);
+
+  return ret;
+}
+
+void
+ide_highlight_index_insert (IdeHighlightIndex *self,
+                            const gchar       *word,
+                            IdeHighlightKind   kind)
+{
+  gchar *key;
+
+  g_assert (self);
+  g_assert (word);
+  g_assert (kind != IDE_HIGHLIGHT_KIND_NONE);
+
+  if (g_hash_table_contains (self->index, word))
+    return;
+
+  key = g_string_chunk_insert (self->strings, word);
+  g_hash_table_insert (self->index, key, GINT_TO_POINTER (kind));
+}
+
+IdeHighlightKind
+ide_highlight_index_lookup (IdeHighlightIndex *self,
+                            const gchar       *word)
+{
+  gpointer value;
+
+  g_assert (self);
+  g_assert (word);
+
+  value = g_hash_table_lookup (self->index, word);
+
+  return GPOINTER_TO_INT (value);
+}
+
+IdeHighlightIndex *
+ide_highlight_index_ref (IdeHighlightIndex *self)
+{
+  g_assert (self);
+  g_assert_cmpint (self->ref_count, >, 0);
+
+  return self;
+}
+
+void
+ide_highlight_index_unref (IdeHighlightIndex *self)
+{
+  g_assert (self);
+  g_assert_cmpint (self->ref_count, >, 0);
+
+  if (g_atomic_int_dec_and_test (&self->ref_count))
+    {
+      g_string_chunk_free (self->strings);
+      g_hash_table_unref (self->index);
+      g_free (self);
+    }
+}
diff --git a/libide/ide-highlight-index.h b/libide/ide-highlight-index.h
new file mode 100644
index 0000000..6a0887c
--- /dev/null
+++ b/libide/ide-highlight-index.h
@@ -0,0 +1,39 @@
+/* ide-highlight-index.h
+ *
+ * Copyright (C) 2015 Christian Hergert <christian hergert me>
+ *
+ * This file 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 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This file 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef IDE_HIGHLIGHT_INDEX_H
+#define IDE_HIGHLIGHT_INDEX_H
+
+#include "ide-highlighter.h"
+
+G_BEGIN_DECLS
+
+typedef struct _IdeHighlightIndex IdeHighlightIndex;
+
+IdeHighlightIndex *ide_highlight_index_new    (void);
+IdeHighlightIndex *ide_highlight_index_ref    (IdeHighlightIndex *self);
+void               ide_highlight_index_unref  (IdeHighlightIndex *self);
+void               ide_highlight_index_insert (IdeHighlightIndex *self,
+                                               const gchar       *word,
+                                               IdeHighlightKind   kind);
+IdeHighlightKind   ide_highlight_index_lookup (IdeHighlightIndex *self,
+                                               const gchar       *word);
+
+G_END_DECLS
+
+#endif /* IDE_HIGHLIGHT_INDEX_H */