1//===-- Environment.cpp ---------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9#include "lldb/Utility/Environment.h"
10
11using namespace lldb_private;
12
13char *Environment::Envp::make_entry(llvm::StringRef Key,
14                                    llvm::StringRef Value) {
15  const size_t size = Key.size() + 1 /*=*/ + Value.size() + 1 /*\0*/;
16  char *Result = static_cast<char *>(
17      Allocator.Allocate(sizeof(char) * size, alignof(char)));
18  char *Next = Result;
19
20  Next = std::copy(Key.begin(), Key.end(), Next);
21  *Next++ = '=';
22  Next = std::copy(Value.begin(), Value.end(), Next);
23  *Next++ = '\0';
24
25  return Result;
26}
27
28Environment::Envp::Envp(const Environment &Env) {
29  Data = static_cast<char **>(
30      Allocator.Allocate(sizeof(char *) * (Env.size() + 1), alignof(char *)));
31  char **Next = Data;
32  for (const auto &KV : Env)
33    *Next++ = make_entry(KV.first(), KV.second);
34  *Next++ = nullptr;
35}
36
37Environment::Environment(const char *const *Env) {
38  if (!Env)
39    return;
40  while (*Env)
41    insert(*Env++);
42}
43
44void Environment::insert(iterator first, iterator last) {
45  while (first != last) {
46    try_emplace(first->first(), first->second);
47    ++first;
48  }
49}
50