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Libc (Windows): simplifies code

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This commit is contained in:
李通洲
2026-07-31 23:12:10 +08:00
parent 5eaf98ecd2
commit 3fae9e0274
1 changed files with 19 additions and 30 deletions
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src/detection/libc/libc_windows.cpp
+19 -30
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@@ -7,48 +7,37 @@ extern "C" {
#endif
template <uint32_t Major, uint32_t Minor>
class version_t {
constexpr static auto buflen() noexcept {
unsigned int len = 2; // "."
if (Major == 0) {
struct version_t {
static constexpr uint32_t digits(uint32_t n) noexcept {
uint32_t len = 1;
for (auto temp = n / 10; temp; temp /= 10) {
len++;
} else {
for (auto n = Major; n; len++, n /= 10);
}
if (Minor == 0) {
len++;
} else {
for (auto n = Minor; n; len++, n /= 10);
}
return len;
}
char buf[buflen()] = {};
char buf[digits(Major) + digits(Minor) + 2];
public:
constexpr version_t() noexcept {
auto ptr = buf + buflen();
auto ptr = buf + sizeof(buf);
*--ptr = '\0';
if (Minor == 0) {
*--ptr = '0';
} else {
for (auto n = Minor; n; n /= 10) {
*--ptr = "0123456789"[n % 10];
auto append = [&](uint32_t n) noexcept {
if (n == 0) {
*--ptr = '0';
} else {
for (; n; n /= 10) {
*--ptr = static_cast<char>('0' + n % 10);
}
}
}
};
append(Minor);
*--ptr = '.';
if (Major == 0) {
*--ptr = '0';
} else {
for (auto n = Major; n; n /= 10) {
*--ptr = "0123456789"[n % 10];
}
}
append(Major);
}
constexpr operator const char*() const {
constexpr operator const char*() const noexcept {
return buf;
}
};
@@ -63,6 +52,6 @@ extern "C" const char* ffDetectLibc(FFLibcResult* result) {
result->name = "msvcrt";
#endif
result->version = version<(__MSVCRT_VERSION__ >> 8), (__MSVCRT_VERSION__ & 8)>;
result->version = version<(__MSVCRT_VERSION__ >> 8), (__MSVCRT_VERSION__ & 0xFF)>;
return nullptr;
}