diff options
| -rw-r--r-- | lib/pure/parseutils.nim | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/pure/parseutils.nim b/lib/pure/parseutils.nim index 989d45f47..1c543e666 100644 --- a/lib/pure/parseutils.nim +++ b/lib/pure/parseutils.nim @@ -215,6 +215,17 @@ proc parseInt*(s: string, number: var int, start = 0): int {. else: number = int(res) +proc tenToThePowerOf(b: int): biggestFloat = + var b = b + var a = 10.0 + result = 1.0 + while true: + if (b and 1) == 1: + result *= a + b = b shr 1 + if b == 0: break + a *= a + proc parseBiggestFloat*(s: string, number: var biggestFloat, start = 0): int {. rtl, extern: "npuParseBiggestFloat", noSideEffect.} = ## parses a float starting at `start` and stores the value into `number`. @@ -280,9 +291,7 @@ proc parseBiggestFloat*(s: string, number: var biggestFloat, start = 0): int {. inc(i) while s[i] == '_': inc(i) # Calculate Exponent - var hd = 1.0 - # XXX: this loop is horrible for large exponents: - for j in 1..exponent: hd = hd * 10.0 + let hd = tenToThePowerOf(exponent) if esign > 0.0: number = number * hd else: number = number / hd # evaluate sign |