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WindowsDevice: Add some utility functions for getting device properties using CfgMgr32.

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This commit is contained in:
Jordan Woyak 2025-10-02 04:11:27 -05:00
commit 3978e1eb2c
2 changed files with 57 additions and 0 deletions
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49
Source/Core/Common/WindowsDevice.cpp
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@ -7,7 +7,10 @@
#include <string>
#include "Hidclass.h"
#include "Common/CommonFuncs.h"
#include "Common/Logging/Log.h"
namespace Common
{
@ -33,6 +36,52 @@ std::wstring GetDeviceProperty(const HDEVINFO& device_info, const PSP_DEVINFO_DA
return std::wstring(unicode_buffer.data());
}
std::optional<std::wstring> GetPropertyHelper(auto function, auto dev,
const DEVPROPKEY* requested_property,
DEVPROPTYPE expected_type)
{
DEVPROPTYPE type{};
ULONG buffer_size{};
if (const auto result = function(dev, requested_property, &type, nullptr, &buffer_size, 0);
result != CR_SUCCESS && result != CR_BUFFER_SMALL)
{
WARN_LOG_FMT(COMMON, "CM_Get_DevNode_Property returned: {}", result);
return std::nullopt;
}
if (type != expected_type)
{
WARN_LOG_FMT(COMMON, "CM_Get_DevNode_Property unexpected type: 0x{:x}", type);
return std::nullopt;
}
std::optional<std::wstring> property;
// FYI: It's legal to write the null terminator at data()[size()] of std::basic_string.
property.emplace(buffer_size / sizeof(WCHAR) - 1, L'\0');
if (const auto result = function(dev, requested_property, &type,
reinterpret_cast<BYTE*>(property->data()), &buffer_size, 0);
result != CR_SUCCESS)
{
ERROR_LOG_FMT(COMMON, "CM_Get_DevNode_Property returned: {}", result);
return std::nullopt;
}
return property;
}
std::optional<std::wstring> GetDevNodeStringProperty(DEVINST dev,
const DEVPROPKEY* requested_property)
{
return GetPropertyHelper(CM_Get_DevNode_Property, dev, requested_property, DEVPROP_TYPE_STRING);
}
std::optional<std::wstring> GetDeviceInterfaceStringProperty(LPCWSTR iface,
const DEVPROPKEY* requested_property)
{
return GetPropertyHelper(CM_Get_Device_Interface_Property, iface, requested_property,
DEVPROP_TYPE_STRING);
}
} // namespace Common
#endif