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sysinfo/arm64: Improve code around registry access and document the fields

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kd-11 2024-09-08 15:21:14 +03:00 committed by kd-11
parent 939479f55e
commit 92c1a8c45d
1 changed files with 17 additions and 5 deletions
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22
rpcs3/util/sysinfo.cpp
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@ -88,16 +88,23 @@ namespace utils
const auto read_reg_sz = [](HKEY hKey, std::string_view value_name) -> std::pair<bool, std::string>
{
char sz[256];
DWORD sz_len = sizeof(sz);
constexpr usz MAX_SZ_LEN = 255;
char sz[MAX_SZ_LEN + 1];
DWORD sz_len = MAX_SZ_LEN;
// Safety; null terminate
sz[0] = 0;
sz[MAX_SZ_LEN] = 0;
// Read string
if (ERROR_SUCCESS != RegQueryValueExA(hKey, value_name.data(), nullptr, nullptr, reinterpret_cast<LPBYTE>(sz), &sz_len))
{
return { false, "" };
}
if (sz_len < sizeof(sz))
// Safety, force null terminator
if (sz_len < MAX_SZ_LEN)
{
// Safety, force null terminator
sz[sz_len] = 0;
}
return { true, sz };
@ -109,10 +116,15 @@ namespace utils
return "Unknown Windows";
}
// Read ProductName (string), CurrentMajorVersionNumber (dword), CurrentMinorVersionNumber (dword) and CurrentBuildNumber (string) as well as CurrentVersion (string)
// ProductName (SZ) - Actual windows install name e.g Windows 10 Pro)
// CurrentMajorVersionNumber (DWORD) - e.g 10 for windows 10, 11 for windows 11
// CurrentMinorVersionNumber (DWORD) - usually 0 for newer windows, pairs with major version
// CurrentBuildNumber (SZ) - Windows build number, e.g 19045, used to identify different releases like 23H2, 24H2, etc
// CurrentVersion (SZ) - NT kernel version, e.g 6.3 for Windows 10
const auto [product_valid, product_name] = read_reg_sz(hKey, "ProductName");
if (!product_valid)
{
RegCloseKey(hKey);
return "Unknown Windows";
}