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constexpr intExp10

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This commit is contained in:
Alexey Milovidov 2020-06-22 23:32:29 +03:00
parent b136999f75
commit 75357ab98d
1 changed files with 70 additions and 67 deletions
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137
src/Common/intExp.h
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@ -20,14 +20,14 @@ inline NO_SANITIZE_UNDEFINED uint64_t intExp2(int x)
return 1ULL << x;
}
inline uint64_t intExp10(int x)
constexpr inline uint64_t intExp10(int x)
{
if (x < 0)
return 0;
if (x > 19)
return std::numeric_limits<uint64_t>::max();
static const uint64_t table[20] =
constexpr uint64_t table[20] =
{
1ULL, 10ULL, 100ULL,
1000ULL, 10000ULL, 100000ULL,
@ -44,9 +44,10 @@ inline uint64_t intExp10(int x)
namespace common
{
inline int exp10_i32(int x)
constexpr inline int exp10_i32(int x)
{
static const int values[] = {
constexpr int values[] =
{
1,
10,
100,
@ -61,74 +62,76 @@ inline int exp10_i32(int x)
return values[x];
}
inline int64_t exp10_i64(int x)
constexpr inline int64_t exp10_i64(int x)
{
static const int64_t values[] = {
1ll,
10ll,
100ll,
1000ll,
10000ll,
100000ll,
1000000ll,
10000000ll,
100000000ll,
1000000000ll,
10000000000ll,
100000000000ll,
1000000000000ll,
10000000000000ll,
100000000000000ll,
1000000000000000ll,
10000000000000000ll,
100000000000000000ll,
1000000000000000000ll
constexpr int64_t values[] =
{
1LL,
10LL,
100LL,
1000LL,
10000LL,
100000LL,
1000000LL,
10000000LL,
100000000LL,
1000000000LL,
10000000000LL,
100000000000LL,
1000000000000LL,
10000000000000LL,
100000000000000LL,
1000000000000000LL,
10000000000000000LL,
100000000000000000LL,
1000000000000000000LL
};
return values[x];
}
inline __int128 exp10_i128(int x)
constexpr inline __int128 exp10_i128(int x)
{
static const __int128 values[] = {
static_cast<__int128>(1ll),
static_cast<__int128>(10ll),
static_cast<__int128>(100ll),
static_cast<__int128>(1000ll),
static_cast<__int128>(10000ll),
static_cast<__int128>(100000ll),
static_cast<__int128>(1000000ll),
static_cast<__int128>(10000000ll),
static_cast<__int128>(100000000ll),
static_cast<__int128>(1000000000ll),
static_cast<__int128>(10000000000ll),
static_cast<__int128>(100000000000ll),
static_cast<__int128>(1000000000000ll),
static_cast<__int128>(10000000000000ll),
static_cast<__int128>(100000000000000ll),
static_cast<__int128>(1000000000000000ll),
static_cast<__int128>(10000000000000000ll),
static_cast<__int128>(100000000000000000ll),
static_cast<__int128>(1000000000000000000ll),
static_cast<__int128>(1000000000000000000ll) * 10ll,
static_cast<__int128>(1000000000000000000ll) * 100ll,
static_cast<__int128>(1000000000000000000ll) * 1000ll,
static_cast<__int128>(1000000000000000000ll) * 10000ll,
static_cast<__int128>(1000000000000000000ll) * 100000ll,
static_cast<__int128>(1000000000000000000ll) * 1000000ll,
static_cast<__int128>(1000000000000000000ll) * 10000000ll,
static_cast<__int128>(1000000000000000000ll) * 100000000ll,
static_cast<__int128>(1000000000000000000ll) * 1000000000ll,
static_cast<__int128>(1000000000000000000ll) * 10000000000ll,
static_cast<__int128>(1000000000000000000ll) * 100000000000ll,
static_cast<__int128>(1000000000000000000ll) * 1000000000000ll,
static_cast<__int128>(1000000000000000000ll) * 10000000000000ll,
static_cast<__int128>(1000000000000000000ll) * 100000000000000ll,
static_cast<__int128>(1000000000000000000ll) * 1000000000000000ll,
static_cast<__int128>(1000000000000000000ll) * 10000000000000000ll,
static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll,
static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll * 10ll,
static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll * 100ll,
static_cast<__int128>(1000000000000000000ll) * 100000000000000000ll * 1000ll
constexpr __int128 values[] =
{
static_cast<__int128>(1LL),
static_cast<__int128>(10LL),
static_cast<__int128>(100LL),
static_cast<__int128>(1000LL),
static_cast<__int128>(10000LL),
static_cast<__int128>(100000LL),
static_cast<__int128>(1000000LL),
static_cast<__int128>(10000000LL),
static_cast<__int128>(100000000LL),
static_cast<__int128>(1000000000LL),
static_cast<__int128>(10000000000LL),
static_cast<__int128>(100000000000LL),
static_cast<__int128>(1000000000000LL),
static_cast<__int128>(10000000000000LL),
static_cast<__int128>(100000000000000LL),
static_cast<__int128>(1000000000000000LL),
static_cast<__int128>(10000000000000000LL),
static_cast<__int128>(100000000000000000LL),
static_cast<__int128>(1000000000000000000LL),
static_cast<__int128>(1000000000000000000LL) * 10LL,
static_cast<__int128>(1000000000000000000LL) * 100LL,
static_cast<__int128>(1000000000000000000LL) * 1000LL,
static_cast<__int128>(1000000000000000000LL) * 10000LL,
static_cast<__int128>(1000000000000000000LL) * 100000LL,
static_cast<__int128>(1000000000000000000LL) * 1000000LL,
static_cast<__int128>(1000000000000000000LL) * 10000000LL,
static_cast<__int128>(1000000000000000000LL) * 100000000LL,
static_cast<__int128>(1000000000000000000LL) * 1000000000LL,
static_cast<__int128>(1000000000000000000LL) * 10000000000LL,
static_cast<__int128>(1000000000000000000LL) * 100000000000LL,
static_cast<__int128>(1000000000000000000LL) * 1000000000000LL,
static_cast<__int128>(1000000000000000000LL) * 10000000000000LL,
static_cast<__int128>(1000000000000000000LL) * 100000000000000LL,
static_cast<__int128>(1000000000000000000LL) * 1000000000000000LL,
static_cast<__int128>(1000000000000000000LL) * 10000000000000000LL,
static_cast<__int128>(1000000000000000000LL) * 100000000000000000LL,
static_cast<__int128>(1000000000000000000LL) * 100000000000000000LL * 10LL,
static_cast<__int128>(1000000000000000000LL) * 100000000000000000LL * 100LL,
static_cast<__int128>(1000000000000000000LL) * 100000000000000000LL * 1000LL
};
return values[x];
}
@ -138,7 +141,7 @@ inline __int128 exp10_i128(int x)
/// intExp10 returning the type T.
template <typename T>
inline T intExp10OfSize(int x)
constexpr inline T intExp10OfSize(int x)
{
if constexpr (sizeof(T) <= 8)
return intExp10(x);