50 lines · cpp
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-exception6//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