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// Copyright (c) 2020 Egor Tensin <Egor.Tensin@gmail.com>
// This file is part of the "winapi-debug" project.
// For details, see https://github.com/egor-tensin/winapi-debug.
// Distributed under the MIT License.
#include <pdb/all.hpp>
#include <winapi/utf8.hpp>
#include <dbghelp.h>
#include <windows.h>
#include <cstddef>
#include <cstring>
#include <limits>
#include <stdexcept>
#include <string>
#include <type_traits>
namespace pdb {
namespace {
std::size_t calc_size(const SymbolInfo::Impl& impl) {
static constexpr auto char_size = sizeof(std::remove_extent<decltype(impl.Name)>::type);
return impl.SizeOfStruct + (impl.NameLen - 1) * char_size;
}
unsigned long cast_line_number(DWORD impl) {
unsigned long dest = 0;
if (impl > std::numeric_limits<decltype(dest)>::max())
throw std::runtime_error{"invalid line number"};
return static_cast<decltype(dest)>(dest);
}
} // namespace
SymbolInfo::SymbolInfo() {
buffer.fill(0);
get_impl().SizeOfStruct = sizeof(Impl);
get_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);
}
std::string SymbolInfo::get_name() const {
// SymFromAddrW, contrary to SymFromAddrA, seems to include the terminating
// null character in NameLen.
return winapi::narrow(get_impl().Name);
}
LineInfo::LineInfo(const Impl& impl)
: file_path{winapi::narrow(impl.FileName)}, line_number{cast_line_number(impl.LineNumber)} {}
} // namespace pdb
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