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-rw-r--r--Build/source/libs/icu/icu-4.6/samples/layout/FontTableCache.cpp91
1 files changed, 91 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-4.6/samples/layout/FontTableCache.cpp b/Build/source/libs/icu/icu-4.6/samples/layout/FontTableCache.cpp
new file mode 100644
index 00000000000..c6547be2f31
--- /dev/null
+++ b/Build/source/libs/icu/icu-4.6/samples/layout/FontTableCache.cpp
@@ -0,0 +1,91 @@
+/*
+ **********************************************************************
+ * Copyright (C) 2003 - 2008, International Business Machines
+ * Corporation and others. All Rights Reserved.
+ **********************************************************************
+ */
+
+#include "layout/LETypes.h"
+
+#include "FontTableCache.h"
+
+#define TABLE_CACHE_INIT 5
+#define TABLE_CACHE_GROW 5
+
+struct FontTableCacheEntry
+{
+ LETag tag;
+ const void *table;
+};
+
+FontTableCache::FontTableCache()
+ : fTableCacheCurr(0), fTableCacheSize(TABLE_CACHE_INIT)
+{
+ fTableCache = LE_NEW_ARRAY(FontTableCacheEntry, fTableCacheSize);
+
+ if (fTableCache == NULL) {
+ fTableCacheSize = 0;
+ return;
+ }
+
+ for (int i = 0; i < fTableCacheSize; i += 1) {
+ fTableCache[i].tag = 0;
+ fTableCache[i].table = NULL;
+ }
+}
+
+FontTableCache::~FontTableCache()
+{
+ for (int i = fTableCacheCurr - 1; i >= 0; i -= 1) {
+ freeFontTable(fTableCache[i].table);
+
+ fTableCache[i].tag = 0;
+ fTableCache[i].table = NULL;
+ }
+
+ fTableCacheCurr = 0;
+
+ LE_DELETE_ARRAY(fTableCache);
+ fTableCache = NULL;
+}
+
+void FontTableCache::freeFontTable(const void *table) const
+{
+ LE_DELETE_ARRAY(table);
+}
+
+const void *FontTableCache::find(LETag tableTag) const
+{
+ for (int i = 0; i < fTableCacheCurr; i += 1) {
+ if (fTableCache[i].tag == tableTag) {
+ return fTableCache[i].table;
+ }
+ }
+
+ const void *table = readFontTable(tableTag);
+
+ ((FontTableCache *) this)->add(tableTag, table);
+
+ return table;
+}
+
+void FontTableCache::add(LETag tableTag, const void *table)
+{
+ if (fTableCacheCurr >= fTableCacheSize) {
+ le_int32 newSize = fTableCacheSize + TABLE_CACHE_GROW;
+
+ fTableCache = (FontTableCacheEntry *) LE_GROW_ARRAY(fTableCache, newSize);
+
+ for (le_int32 i = fTableCacheSize; i < newSize; i += 1) {
+ fTableCache[i].tag = 0;
+ fTableCache[i].table = NULL;
+ }
+
+ fTableCacheSize = newSize;
+ }
+
+ fTableCache[fTableCacheCurr].tag = tableTag;
+ fTableCache[fTableCacheCurr].table = table;
+
+ fTableCacheCurr += 1;
+}