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(Size: sizeof(char) * size, Alignment: alignof(char)));
18 char *Next = Result;
19
20 Next = std::copy(first: Key.begin(), last: Key.end(), result: Next);
21 *Next++ = '=';
22 Next = std::copy(first: Value.begin(), last: Value.end(), result: Next);
23 *Next++ = '\0';
24
25 return Result;
26}
27
28Environment::Envp::Envp(const Environment &Env) {
29 Data = static_cast<char **>(
30 Allocator.Allocate(Size: sizeof(char *) * (Env.size() + 1), Alignment: alignof(char *)));
31 char **Next = Data;
32 for (const auto &KV : Env)
33 *Next++ = make_entry(Key: KV.first(), Value: KV.second);
34 *Next++ = nullptr;
35}
36
37Environment::Environment(const char *const *Env) {
38 if (!Env)
39 return;
40 while (*Env)
41 insert(KeyEqValue: *Env++);
42}
43
44void Environment::insert(iterator first, iterator last) {
45 while (first != last) {
46 try_emplace(Key: first->first(), Args&: first->second);
47 ++first;
48 }
49}
50

source code of lldb/source/Utility/Environment.cpp