[libc-commits] [libc] [libc] wcstok implementation (PR #145989)

[Michael Jones via libc-commits]

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@@ -0,0 +1,181 @@
+//===-- Unittests for wcstok ----------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "hdr/types/size_t.h"
+#include "hdr/types/wchar_t.h"
+#include "src/wchar/wcstok.h"
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibcWCSTokReentrantTest, NoTokenFound) {
+  { // Empty source and delimiter string.
+    wchar_t empty[] = L"";
+    wchar_t *reserve = nullptr;
+    ASSERT_EQ(LIBC_NAMESPACE::wcstok(empty, L"", &reserve), nullptr);
+    // Another call to ensure that 'reserve' is not in a bad state.
+    ASSERT_EQ(LIBC_NAMESPACE::wcstok(empty, L"", &reserve), nullptr);
+    ASSERT_EQ(LIBC_NAMESPACE::wcstok(nullptr, L"", &reserve), nullptr);
+  }
+  { // Empty source and single character delimiter string.
+    wchar_t empty[] = L"";
+    wchar_t *reserve = nullptr;
+    ASSERT_EQ(LIBC_NAMESPACE::wcstok(empty, L"_", &reserve), nullptr);
+    // Another call to ensure that 'reserve' is not in a bad state.
+    ASSERT_EQ(LIBC_NAMESPACE::wcstok(empty, L"_", &reserve), nullptr);
+    ASSERT_EQ(LIBC_NAMESPACE::wcstok(nullptr, L"_", &reserve), nullptr);
+  }
+  { // Same wchar_tacter source and delimiter string.
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michaelrj-google wrote:

find/replace error (char -> wchar_t) here and in a few other comments

https://github.com/llvm/llvm-project/pull/145989