https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/172498
None >From 8e34a2da81601b39d5ae78d51e0e45be7067d00c Mon Sep 17 00:00:00 2001 From: c8ef <[email protected]> Date: Tue, 16 Dec 2025 23:11:31 +0800 Subject: [PATCH] [libc] Add `IN6_IS_ADDR_MULTICAST` --- libc/include/llvm-libc-macros/netinet-in-macros.h | 3 +++ libc/test/include/netinet_in_test.cpp | 5 +++++ 2 files changed, 8 insertions(+) diff --git a/libc/include/llvm-libc-macros/netinet-in-macros.h b/libc/include/llvm-libc-macros/netinet-in-macros.h index 3148aed6bb112..863ff8759e446 100644 --- a/libc/include/llvm-libc-macros/netinet-in-macros.h +++ b/libc/include/llvm-libc-macros/netinet-in-macros.h @@ -53,6 +53,9 @@ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[14]) == 0 && \ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[15]) == 1) +#define IN6_IS_ADDR_MULTICAST(a) \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[0]) == 0xff + #define IN6_IS_ADDR_LINKLOCAL(a) \ ((__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[0]) == 0xfe && \ (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[1] & 0xc0) == 0x80) diff --git a/libc/test/include/netinet_in_test.cpp b/libc/test/include/netinet_in_test.cpp index 15e57ccef7ac5..e8cb8e48ff4b4 100644 --- a/libc/test/include/netinet_in_test.cpp +++ b/libc/test/include/netinet_in_test.cpp @@ -24,6 +24,11 @@ TEST(LlvmLibcNetinetInTest, IN6Macro) { EXPECT_TRUE(IN6_IS_ADDR_LOOPBACK(buff)); buff[15] = 0; + EXPECT_FALSE(IN6_IS_ADDR_MULTICAST(buff)); + buff[0] = 0xff; + EXPECT_TRUE(IN6_IS_ADDR_MULTICAST(buff)); + buff[0] = 0; + buff[0] = 0xfe; buff[1] = 0x80; EXPECT_TRUE(IN6_IS_ADDR_LINKLOCAL(buff)); _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
