[Support] Add a Unicode conversion wrapper from UTF16 to UTF8
This is to support parsing UTF16 response files in LLVM/lib/Option for
lld and clang.
Reviewers: hans
Differential Revision: http://llvm-reviews.chandlerc.com/D1138
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186426 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/unittests/Support/CMakeLists.txt b/unittests/Support/CMakeLists.txt
index fedfb3d..2cbe730 100644
--- a/unittests/Support/CMakeLists.txt
+++ b/unittests/Support/CMakeLists.txt
@@ -12,6 +12,7 @@
CommandLineTest.cpp
CompressionTest.cpp
ConstantRangeTest.cpp
+ ConvertUTFTest.cpp
DataExtractorTest.cpp
EndianTest.cpp
ErrorOrTest.cpp
diff --git a/unittests/Support/ConvertUTFTest.cpp b/unittests/Support/ConvertUTFTest.cpp
new file mode 100644
index 0000000..13ea75b
--- /dev/null
+++ b/unittests/Support/ConvertUTFTest.cpp
@@ -0,0 +1,65 @@
+//===- llvm/unittest/Support/ConvertUTFTest.cpp - ConvertUTF tests --------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/ConvertUTF.h"
+#include "gtest/gtest.h"
+#include <string>
+
+using namespace llvm;
+
+TEST(ConvertUTFTest, ConvertUTF16LittleEndianToUTF8String) {
+ // Src is the look of disapproval.
+ static const char Src[] = "\xff\xfe\xa0\x0c_\x00\xa0\x0c";
+ ArrayRef<char> Ref(Src, sizeof(Src) - 1);
+ std::string Result;
+ bool Success = convertUTF16ToUTF8String(Ref, Result);
+ EXPECT_TRUE(Success);
+ std::string Expected("\xe0\xb2\xa0_\xe0\xb2\xa0");
+ EXPECT_EQ(Expected, Result);
+}
+
+TEST(ConvertUTFTest, ConvertUTF16BigEndianToUTF8String) {
+ // Src is the look of disapproval.
+ static const char Src[] = "\xfe\xff\x0c\xa0\x00_\x0c\xa0";
+ ArrayRef<char> Ref(Src, sizeof(Src) - 1);
+ std::string Result;
+ bool Success = convertUTF16ToUTF8String(Ref, Result);
+ EXPECT_TRUE(Success);
+ std::string Expected("\xe0\xb2\xa0_\xe0\xb2\xa0");
+ EXPECT_EQ(Expected, Result);
+}
+
+TEST(ConvertUTFTest, OddLengthInput) {
+ std::string Result;
+ bool Success = convertUTF16ToUTF8String(ArrayRef<char>("xxxxx", 5), Result);
+ EXPECT_FALSE(Success);
+}
+
+TEST(ConvertUTFTest, Empty) {
+ std::string Result;
+ bool Success = convertUTF16ToUTF8String(ArrayRef<char>(), Result);
+ EXPECT_TRUE(Success);
+ EXPECT_TRUE(Result.empty());
+}
+
+TEST(ConvertUTFTest, HasUTF16BOM) {
+ bool HasBOM = hasUTF16ByteOrderMark(ArrayRef<char>("\xff\xfe", 2));
+ EXPECT_TRUE(HasBOM);
+ HasBOM = hasUTF16ByteOrderMark(ArrayRef<char>("\xfe\xff", 2));
+ EXPECT_TRUE(HasBOM);
+ HasBOM = hasUTF16ByteOrderMark(ArrayRef<char>("\xfe\xff ", 3));
+ EXPECT_TRUE(HasBOM); // Don't care about odd lengths.
+ HasBOM = hasUTF16ByteOrderMark(ArrayRef<char>("\xfe\xff\x00asdf", 6));
+ EXPECT_TRUE(HasBOM);
+
+ HasBOM = hasUTF16ByteOrderMark(ArrayRef<char>());
+ EXPECT_FALSE(HasBOM);
+ HasBOM = hasUTF16ByteOrderMark(ArrayRef<char>("\xfe", 1));
+ EXPECT_FALSE(HasBOM);
+}