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28 #ifndef DOUBLE_CONVERSION_CACHED_POWERS_H_
29 #define DOUBLE_CONVERSION_CACHED_POWERS_H_
33 namespace double_conversion
{
35 class PowersOfTenCache
{
38 // Not all powers of ten are cached. The decimal exponent of two neighboring
39 // cached numbers will differ by kDecimalExponentDistance.
40 static const int kDecimalExponentDistance
;
42 static const int kMinDecimalExponent
;
43 static const int kMaxDecimalExponent
;
45 // Returns a cached power-of-ten with a binary exponent in the range
46 // [min_exponent; max_exponent] (boundaries included).
47 static void GetCachedPowerForBinaryExponentRange(int min_exponent
,
50 int* decimal_exponent
);
52 // Returns a cached power of ten x ~= 10^k such that
53 // k <= decimal_exponent < k + kCachedPowersDecimalDistance.
54 // The given decimal_exponent must satisfy
55 // kMinDecimalExponent <= requested_exponent, and
56 // requested_exponent < kMaxDecimalExponent + kDecimalExponentDistance.
57 static void GetCachedPowerForDecimalExponent(int requested_exponent
,
62 } // namespace double_conversion
64 #endif // DOUBLE_CONVERSION_CACHED_POWERS_H_