https://github.com/c8ef created https://github.com/llvm/llvm-project/pull/172312
None >From 77c407bc401353723cc0a5d684c9e17102d0559b Mon Sep 17 00:00:00 2001 From: c8ef <[email protected]> Date: Mon, 15 Dec 2025 23:01:04 +0800 Subject: [PATCH] [libc] Add `IN6_IS_ADDR_LOOPBACK` --- libc/include/llvm-libc-macros/netinet-in-macros.h | 9 +++++++++ libc/test/include/netinet_in_test.cpp | 5 +++++ 2 files changed, 14 insertions(+) diff --git a/libc/include/llvm-libc-macros/netinet-in-macros.h b/libc/include/llvm-libc-macros/netinet-in-macros.h index f97a2dd0c3fda..3148aed6bb112 100644 --- a/libc/include/llvm-libc-macros/netinet-in-macros.h +++ b/libc/include/llvm-libc-macros/netinet-in-macros.h @@ -44,6 +44,15 @@ (__LLVM_LIBC_CAST(reinterpret_cast, uint32_t *, a)[2]) == 0 && \ (__LLVM_LIBC_CAST(reinterpret_cast, uint32_t *, a)[3]) == 0) +#define IN6_IS_ADDR_LOOPBACK(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 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[12]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[13]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[14]) == 0 && \ + (__LLVM_LIBC_CAST(reinterpret_cast, uint8_t *, a)[15]) == 1) + #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 d70c780800858..15e57ccef7ac5 100644 --- a/libc/test/include/netinet_in_test.cpp +++ b/libc/test/include/netinet_in_test.cpp @@ -19,6 +19,11 @@ TEST(LlvmLibcNetinetInTest, IN6Macro) { buff[i] = 0; } + EXPECT_FALSE(IN6_IS_ADDR_LOOPBACK(buff)); + buff[15] = 1; + EXPECT_TRUE(IN6_IS_ADDR_LOOPBACK(buff)); + buff[15] = 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
