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// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "PDB repository" project.
// For details, see https://github.com/egor-tensin/pdb-repo.
// Distributed under the MIT License.
#include "pdb/all.hpp"
#include <SafeInt.hpp>
#include <DbgHelp.h>
#include <Windows.h>
#include <cstddef>
#include <cstring>
#include <stdexcept>
namespace pdb {
namespace {
std::size_t calc_size(const SymbolInfo::Impl& impl) {
try {
return SafeInt<std::size_t>{impl.SizeOfStruct} + impl.NameLen - 1;
} catch (const SafeIntException&) {
throw std::runtime_error{"invalid SYMBOL_INFO size"};
}
}
unsigned long cast_line_number(DWORD impl) {
unsigned long dest = 0;
if (!SafeCast(impl, dest))
throw std::runtime_error{"invalid line number"};
return dest;
}
} // namespace
SymbolInfo::SymbolInfo() : buffer{}, impl{*reinterpret_cast<Impl*>(buffer.data())} {
buffer.fill(0);
impl.SizeOfStruct = sizeof(Impl);
impl.MaxNameLen = MAX_SYM_NAME;
}
SymbolInfo::SymbolInfo(const Impl& impl) : SymbolInfo{} {
if (impl.SizeOfStruct != sizeof(impl))
throw std::runtime_error{"invalid SYMBOL_INFO.SizeOfStruct"};
const auto impl_size = calc_size(impl);
if (impl_size > buffer.size())
throw std::runtime_error{"SYMBOL_INFO is too large"};
std::memcpy(buffer.data(), &impl, impl_size);
}
LineInfo::LineInfo(const Impl& impl)
: file_path{impl.FileName}, line_number{cast_line_number(impl.LineNumber)} {}
} // namespace pdb
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