[libc-commits] [libc] [libc] Add inet_ntop (PR #204143)

[Pavel Labath via libc-commits]

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@@ -0,0 +1,255 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Unittests for inet_ntop.
+///
+//===----------------------------------------------------------------------===//
+
+#include "hdr/errno_macros.h"
+#include "hdr/sys_socket_macros.h"
+#include "hdr/types/struct_in6_addr.h"
+#include "hdr/types/struct_in_addr.h"
+#include "src/__support/endian_internal.h"
+#include "src/arpa/inet/inet_ntop.h"
+#include "test/UnitTest/ErrnoCheckingTest.h"
+#include "test/UnitTest/Test.h"
+
+using LlvmLibcInetNtopTest = LIBC_NAMESPACE::testing::ErrnoCheckingTest;
+
+TEST_F(LlvmLibcInetNtopTest, InvalidFamily) {
+  char buf[64];
+  struct in_addr addr = {0};
+  ASSERT_EQ(static_cast<const char *>(nullptr),
+            LIBC_NAMESPACE::inet_ntop(AF_INET + AF_INET6 + 1, &addr, buf,
+                                      sizeof(buf)));
+  ASSERT_ERRNO_EQ(EAFNOSUPPORT);
+}
+
+static void *ipv4(uint8_t a, uint8_t b, uint8_t c, uint8_t d) {
+  static struct in_addr addr;
+  addr.s_addr = LIBC_NAMESPACE::Endian::to_big_endian(
+      static_cast<uint32_t>(a) << 24 | static_cast<uint32_t>(b) << 16 |
+      static_cast<uint32_t>(c) << 8 | static_cast<uint32_t>(d));
+  return &addr;
+}
+
+static void *ipv6(uint16_t a, uint16_t b, uint16_t c, uint16_t d, uint16_t e,
+                  uint16_t f, uint16_t g, uint16_t h) {
+  static struct in6_addr addr;
+  addr.s6_addr16[0] = LIBC_NAMESPACE::Endian::to_big_endian(a);
+  addr.s6_addr16[1] = LIBC_NAMESPACE::Endian::to_big_endian(b);
+  addr.s6_addr16[2] = LIBC_NAMESPACE::Endian::to_big_endian(c);
+  addr.s6_addr16[3] = LIBC_NAMESPACE::Endian::to_big_endian(d);
+  addr.s6_addr16[4] = LIBC_NAMESPACE::Endian::to_big_endian(e);
+  addr.s6_addr16[5] = LIBC_NAMESPACE::Endian::to_big_endian(f);
+  addr.s6_addr16[6] = LIBC_NAMESPACE::Endian::to_big_endian(g);
+  addr.s6_addr16[7] = LIBC_NAMESPACE::Endian::to_big_endian(h);
+  return &addr;
+}
+
+TEST_F(LlvmLibcInetNtopTest, IPv4Tests) {
----------------
labath wrote:

Done.

https://github.com/llvm/llvm-project/pull/204143