[clang] [clang-tools-extra] [libc] [libc][c11] implement ctime (PR #107285)

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In-Reply-To: <llvm.org/llvm/llvm-project/pull/107285 at github.com>


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@@ -0,0 +1,43 @@
+//===-- Unittests for ctime -----------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+// make check-libc LIBC_TEST_TARGET=call_ctime VERBOSE=1
+#include "src/errno/libc_errno.h"
+#include "src/time/ctime.h"
+#include "test/UnitTest/Test.h"
+#include "test/src/time/TmHelper.h"
+
+static inline char *call_ctime(struct time_t *t) {
+  return LIBC_NAMESPACE::ctime(t);
+}
+
+TEST(LlvmLibcCtime, Nullptr) {
+  char *result;
+  result = LIBC_NAMESPACE::ctime(nullptr);
+  ASSERT_ERRNO_EQ(EINVAL);
+  ASSERT_STREQ(nullptr, result);
+}
+
+TEST(LlvmLibcCtime, ValidUnixTimestamp0) {
+  struct time_t t = 0;
+  char* result = call_ctime(&t);
+  ASSERT_STREQ("Thu Jan  1 00:00:00 1970\n", result);
+}
+
+TEST(LlvmLibcCtime, ValidUnixTimestamp32Int) {
+  struct time_t t = 2147483647;
+  char* result = call_ctime(&t);
+  ASSERT_STREQ("Tue Jan  19 03:14:07 2038\n", result);
+}
+
+TEST(LlvmLibcCtime, InvalidArgument) {
+  struct time_t t = 2147483648;
+  char* result = call_ctime(&t);
+  ASSERT_ERRNO_EQ(EINVAL);
+  ASSERT_STREQ(nullptr, result);
+}
----------------
lntue wrote:

Nit: missing new line at the end of file.

https://github.com/llvm/llvm-project/pull/107285