1 files changed, 49 insertions, 0 deletions

diff --git a/contrib/llvm-project/lldb/source/Utility/Environment.cpp b/contrib/llvm-project/lldb/source/Utility/Environment.cpp
new file mode 100644
index 000000000000..140533600712
--- /dev/null
+++ b/contrib/llvm-project/lldb/source/Utility/Environment.cpp
@@ -0,0 +1,49 @@
+//===-- Environment.cpp -----------------------------------------*- C++ -*-===//
+//
+// 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
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Utility/Environment.h"
+
+using namespace lldb_private;
+
+char *Environment::Envp::make_entry(llvm::StringRef Key,
+                                    llvm::StringRef Value) {
+  const size_t size = Key.size() + 1 /*=*/ + Value.size() + 1 /*\0*/;
+  char *Result = reinterpret_cast<char *>(
+      Allocator.Allocate(sizeof(char) * size, alignof(char)));
+  char *Next = Result;
+
+  Next = std::copy(Key.begin(), Key.end(), Next);
+  *Next++ = '=';
+  Next = std::copy(Value.begin(), Value.end(), Next);
+  *Next++ = '\0';
+
+  return Result;
+}
+
+Environment::Envp::Envp(const Environment &Env) {
+  Data = reinterpret_cast<char **>(
+      Allocator.Allocate(sizeof(char *) * (Env.size() + 1), alignof(char *)));
+  char **Next = Data;
+  for (const auto &KV : Env)
+    *Next++ = make_entry(KV.first(), KV.second);
+  *Next++ = nullptr;
+}
+
+Environment::Environment(const char *const *Env) {
+  if (!Env)
+    return;
+  while (*Env)
+    insert(*Env++);
+}
+
+void Environment::insert(const_iterator first, const_iterator last) {
+  while (first != last) {
+    try_emplace(first->first(), first->second);
+    ++first;
+  }
+}