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Fix warning from MSVC about data loss

This commit is contained in:
Martchus 2023-05-10 22:06:59 +02:00
parent 0d0685d4c7
commit 0341316b4b
1 changed files with 7 additions and 3 deletions
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10
conversion/stringconversion.cpp
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@ -8,6 +8,7 @@
#define CPP_UTILITIES_THREAD_LOCAL
#endif
#include <algorithm>
#include <cmath>
#include <cstdlib>
#include <iomanip>
@ -203,20 +204,23 @@ StringData convertUtf8ToLatin1(const char *inputBuffer, std::size_t inputBufferS
#ifdef PLATFORM_WINDOWS
/*!
* \brief Converts the specified multi-byte string (assumed to be UTF-8) to a wide string using the WinAPI.
* \remarks Only available under Windows.
* \remarks
* - Only available under Windows.
* - If \a inputBuffer exceeds std::numeric_limits<int>::max() it will be truncated.
*/
std::wstring convertMultiByteToWide(std::error_code &ec, std::string_view inputBuffer)
{
// calculate required size
auto widePath = std::wstring();
auto size = MultiByteToWideChar(CP_UTF8, 0, inputBuffer.data(), inputBuffer.size(), nullptr, 0);
auto bufferSize = static_cast<int>(std::clamp<std::size_t>(inputBuffer.size(), 0, std::numeric_limits<int>::max()));
auto size = MultiByteToWideChar(CP_UTF8, 0, inputBuffer.data(), bufferSize, nullptr, 0);
if (size <= 0) {
ec = std::error_code(GetLastError(), std::system_category());
return widePath;
}
// do the actual conversion
widePath.resize(static_cast<std::wstring::size_type>(size));
size = MultiByteToWideChar(CP_UTF8, 0, inputBuffer.data(), inputBuffer.size(), widePath.data(), size);
size = MultiByteToWideChar(CP_UTF8, 0, inputBuffer.data(), bufferSize, widePath.data(), size);
if (size <= 0) {
ec = std::error_code(GetLastError(), std::system_category());
widePath.clear();