https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/172646
None >From 886d2a0d7bbc21173a6731de0d6bea04d612b050 Mon Sep 17 00:00:00 2001 From: c8ef <[email protected]> Date: Wed, 17 Dec 2025 20:57:20 +0800 Subject: [PATCH] [libc] Add `IN6_IS_ADDR_V4COMPAT` --- libc/include/llvm-libc-macros/netinet-in-macros.h | 6 ++++++ libc/test/include/netinet_in_test.cpp | 11 +++++++++++ 2 files changed, 17 insertions(+) diff --git a/libc/include/llvm-libc-macros/netinet-in-macros.h b/libc/include/llvm-libc-macros/netinet-in-macros.h index 1d7bef833f2b8..f22f0bab33772 100644 --- a/libc/include/llvm-libc-macros/netinet-in-macros.h +++ b/libc/include/llvm-libc-macros/netinet-in-macros.h @@ -72,6 +72,12 @@ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[10]) == 0xff && \ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[11]) == 0xff) +#define IN6_IS_ADDR_V4COMPAT(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, uint32_t *, a)[2]) == 0 && \ + !IN6_IS_ADDR_UNSPECIFIED(a) && !IN6_IS_ADDR_LOOPBACK(a)) + #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 2f57080ef8b77..2fb46a9227c07 100644 --- a/libc/test/include/netinet_in_test.cpp +++ b/libc/test/include/netinet_in_test.cpp @@ -63,4 +63,15 @@ TEST(LlvmLibcNetinetInTest, IN6Macro) { EXPECT_TRUE(IN6_IS_ADDR_V4MAPPED(buff)); buff[10] = 0; buff[11] = 0; + + for (int i = 12; i < 16; ++i) { + buff[i] ^= 42; + EXPECT_TRUE(IN6_IS_ADDR_V4COMPAT(buff)); + buff[i] ^= 42; + } + for (int i = 0; i < 12; ++i) { + buff[i] ^= 42; + EXPECT_FALSE(IN6_IS_ADDR_V4COMPAT(buff)); + buff[i] ^= 42; + } } _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
