https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/172645
None >From 0a03867534b22394304030c6f933781b8bb60ea8 Mon Sep 17 00:00:00 2001 From: c8ef <[email protected]> Date: Wed, 17 Dec 2025 20:47:11 +0800 Subject: [PATCH] [libc] Add `IN6_IS_ADDR_V4MAPPED` --- libc/include/llvm-libc-macros/netinet-in-macros.h | 8 ++++++++ libc/test/include/netinet_in_test.cpp | 7 +++++++ 2 files changed, 15 insertions(+) diff --git a/libc/include/llvm-libc-macros/netinet-in-macros.h b/libc/include/llvm-libc-macros/netinet-in-macros.h index 88ffe92756b16..1d7bef833f2b8 100644 --- a/libc/include/llvm-libc-macros/netinet-in-macros.h +++ b/libc/include/llvm-libc-macros/netinet-in-macros.h @@ -64,6 +64,14 @@ ((__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[0]) == 0xfe && \ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[1] & 0xc0) == 0xc0) +#define IN6_IS_ADDR_V4MAPPED(a) \ + ((__LLVM_LIBC_CAST(reinterpret_cast, uint32_t *, a)[0]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint32_t *, a)[1]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[8]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[9]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[10]) == 0xff && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[11]) == 0xff) + #define IN6_IS_ADDR_MC_NODELOCAL(a) \ (IN6_IS_ADDR_MULTICAST(a) && \ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[1] & 0xf) == 0x1) diff --git a/libc/test/include/netinet_in_test.cpp b/libc/test/include/netinet_in_test.cpp index 72500c4d51438..2f57080ef8b77 100644 --- a/libc/test/include/netinet_in_test.cpp +++ b/libc/test/include/netinet_in_test.cpp @@ -56,4 +56,11 @@ TEST(LlvmLibcNetinetInTest, IN6Macro) { EXPECT_TRUE(IN6_IS_ADDR_MC_GLOBAL(buff)); buff[1] = 0; buff[0] = 0; + + EXPECT_FALSE(IN6_IS_ADDR_V4MAPPED(buff)); + buff[10] = 0xff; + buff[11] = 0xff; + EXPECT_TRUE(IN6_IS_ADDR_V4MAPPED(buff)); + buff[10] = 0; + buff[11] = 0; } _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
