[libc-commits] [libc] [libc]: Implement strfrom* functions and utils (PR #85438)

[Michael Jones via libc-commits]

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@@ -0,0 +1,91 @@
+//===-- Unittests for strfromf --------------------------------------------===//
+//
+// 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 "src/stdlib/strfromf.h"
+#include "test/UnitTest/Test.h"
+
+TEST(LlvmLibcStrfromfTest, DecimalFloatFormat) {
+  char buff[100];
+  int written;
+
+  written = LIBC_NAMESPACE::strfromf(buff, 16, "%f", 1.0);
+  EXPECT_EQ(written, 8);
+  ASSERT_STREQ(buff, "1.000000");
+
+  written = LIBC_NAMESPACE::strfromf(buff, 20, "%f", 1234567890);
+  EXPECT_EQ(written, 17);
+  ASSERT_STREQ(buff, "1234567936.000000");
+
+  written = LIBC_NAMESPACE::strfromf(buff, 5, "%f", "1234567890.0");
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michaelrj-google wrote:

you need to remove the quotes around this number.

https://github.com/llvm/llvm-project/pull/85438