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-rw-r--r--gen/map.c90
1 files changed, 90 insertions, 0 deletions
diff --git a/gen/map.c b/gen/map.c
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+++ b/gen/map.c
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+/*
+ * This file is part of preppie.
+ *
+ * Copyright (C) 2010 Mikhail Zabaluev <mikhail.zabaluev@gmail.com>
+ *
+ * This work 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 2.1 of the License, or (at your option) any later version.
+ *
+ * This work 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 work; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include "map.h"
+
+
+SprepGenMap *
+sprep_gen_map_new ()
+{
+ return g_new0 (SprepGenMap, 1);
+}
+
+void
+sprep_gen_map_destroy (SprepGenMap *map)
+{
+ int i;
+
+ for (i = 0; i < SPREP_PAGE_TABLE_SIZE; i++) {
+ const SprepGenMapping **mappings = map->pages[i].mappings;
+ if (mappings != NULL) {
+ g_free (mappings);
+ }
+ }
+
+ g_free (map);
+}
+
+void
+sprep_gen_map_add (SprepGenMap *map,
+ gunichar key,
+ const SprepGenMapping *value)
+{
+ const SprepGenMapping **mappings;
+ guint ptable_index;
+ guint mapping_index;
+
+ g_return_if_fail (key <= SPREP_UNICHAR_MAX);
+
+ ptable_index = key >> SPREP_PAGE_SIZE_SHIFT;
+
+ mappings = map->pages[ptable_index].mappings;
+
+ if (mappings == NULL) {
+ mappings = g_new0 (const SprepGenMapping *, SPREP_PAGE_SIZE);
+ map->pages[ptable_index].mappings = mappings;
+ }
+
+ mapping_index = key & SPREP_PAGE_INDEX_MASK;
+
+ if (G_UNLIKELY (mappings[mapping_index] != NULL
+ && mappings[mapping_index] != value)) {
+ g_warning ("remapping for character <U+%04X>", (guint) key);
+ }
+
+ mappings[mapping_index] = value;
+}
+
+gsize
+sprep_gen_map_prepare_layout (SprepGenMap *map)
+{
+ guint next_offset = SPREP_PAGE_TABLE_SIZE;
+ int i;
+
+ for (i = 0; i < SPREP_PAGE_TABLE_SIZE; i++) {
+ if (map->pages[i].mappings != NULL) {
+ map->pages[i].offset = next_offset;
+ next_offset += SPREP_PAGE_SIZE;
+ }
+ }
+
+ return next_offset;
+}