add SkUnichar_IsVariationSelector()
git-svn-id: http://skia.googlecode.com/svn/trunk@2915 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gyp/tests.gyp b/gyp/tests.gyp
index acec823..e47bec6 100644
--- a/gyp/tests.gyp
+++ b/gyp/tests.gyp
@@ -64,6 +64,7 @@
'../tests/Test.h',
'../tests/TestSize.cpp',
'../tests/ToUnicode.cpp',
+ '../tests/UnicodeTest.cpp',
'../tests/UtilsTest.cpp',
'../tests/WArrayTest.cpp',
'../tests/WritePixelsTest.cpp',
diff --git a/include/core/SkUtils.h b/include/core/SkUtils.h
index 2e20107..84528b2 100644
--- a/include/core/SkUtils.h
+++ b/include/core/SkUtils.h
@@ -91,6 +91,21 @@
size_t SkUTF16_ToUTF8(const uint16_t utf16[], int numberOf16BitValues,
char utf8[] = NULL);
+static bool SkUnichar_IsVariationSelector(SkUnichar uni) {
+/* The 'true' ranges are:
+ * 0x180B <= uni <= 0x180D
+ * 0xFE00 <= uni <= 0xFE0F
+ * 0xE0100 <= uni <= 0xE01EF
+ */
+ if (uni < 0x180B || uni > 0xE01EF) {
+ return false;
+ }
+ if ((uni > 0x180D && uni < 0xFE00) || (uni > 0xFE0F && uni < 0xE0100)) {
+ return false;
+ }
+ return true;
+}
+
///////////////////////////////////////////////////////////////////////////////
class SkAutoTrace {
diff --git a/tests/UnicodeTest.cpp b/tests/UnicodeTest.cpp
new file mode 100644
index 0000000..602ff81
--- /dev/null
+++ b/tests/UnicodeTest.cpp
@@ -0,0 +1,45 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "Test.h"
+#include "SkUtils.h"
+
+// Unicode Variation Selector ranges: inclusive
+#define UVS_MIN0 0x180B
+#define UVS_MAX0 0x180D
+#define UVS_MIN1 0xFE00
+#define UVS_MAX1 0xFE0F
+#define UVS_MIN2 0xE0100
+#define UVS_MAX2 0xE01EF
+
+static bool isUVS(SkUnichar uni) {
+ return (uni >= UVS_MIN0 && uni <= UVS_MAX0) ||
+ (uni >= UVS_MIN1 && uni <= UVS_MAX1) ||
+ (uni >= UVS_MIN2 && uni <= UVS_MAX2);
+}
+
+static void test_uvs(skiatest::Reporter* reporter) {
+ // [min, max], [min, max] ... inclusive
+ static const SkUnichar gRanges[] = {
+ UVS_MIN0, UVS_MAX0, UVS_MIN1, UVS_MAX1, UVS_MIN2, UVS_MAX2
+ };
+
+ for (size_t i = 0; i < SK_ARRAY_COUNT(gRanges); i += 2) {
+ for (SkUnichar uni = gRanges[i] - 8; uni <= gRanges[i+1] + 8; ++uni) {
+ bool uvs0 = isUVS(uni);
+ bool uvs1 = SkUnichar_IsVariationSelector(uni);
+ REPORTER_ASSERT(reporter, uvs0 == uvs1);
+ }
+ }
+}
+
+static void TestUnicode(skiatest::Reporter* reporter) {
+ test_uvs(reporter);
+}
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("Unicode", TestUnicodeClass, TestUnicode)