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
11 using namespace lldb_private;
12
make_entry(llvm::StringRef Key,llvm::StringRef Value)13 char *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
Envp(const Environment & Env)28 Environment::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
Environment(const char * const * Env)37 Environment::Environment(const char *const *Env) {
38 if (!Env)
39 return;
40 while (*Env)
41 insert(*Env++);
42 }
43
insert(iterator first,iterator last)44 void Environment::insert(iterator first, iterator last) {
45 while (first != last) {
46 try_emplace(first->first(), first->second);
47 ++first;
48 }
49 }
50