[libc-commits] [libc] [libc][realpath] Implement symbolic path resolution (PR #204467)

[Jeff Bailey via libc-commits]

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@@ -0,0 +1,217 @@
+//===----------------------------------------------------------------------===//
+//
+// 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
+/// Implementation of POSIX realpath.
+///
+//===----------------------------------------------------------------------===//
+
+#include "src/stdlib/realpath.h"
+#include "hdr/errno_macros.h"
+#include "hdr/limits_macros.h"
+#include "hdr/types/size_t.h"
+#include "src/__support/CPP/string_view.h"
+#include "src/__support/alloc-checker.h"
+#include "src/__support/common.h"
+#include "src/__support/error_or.h"
+#include "src/__support/libc_errno.h"
+#include "src/__support/macros/config.h"
+#include "src/string/memory_utils/inline_memcpy.h"
+
+namespace LIBC_NAMESPACE_DECL {
+namespace {
+
+// Separator character for POSIX paths.
+constexpr char PATH_SEP = '/';
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kaladron wrote:

We should have this as a global constexpr somewhere because we'll use it over and over.  (I realised I just sent out for review basename and dirname that should also use this)

https://github.com/llvm/llvm-project/pull/204467