jyapayne/Nim
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

merge similar procs regarding digits (#18318)

Browse source
This commit is contained in:
flywind 2021-06-22 23:02:32 +08:00 • committed by GitHub
commit 9a81e91fa5
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
5 changed files with 105 additions and 133 deletions
Download patch file Download diff file Expand all files Collapse all files

32
lib/system/dragonbox.nim
View file

@ -21,6 +21,10 @@
## Note:
## This function may temporarily write up to DtoaMinBufferLength characters into the buffer.
import std/private/digitsutils
const
dtoaMinBufferLength*: cint = 64
@ -1038,34 +1042,6 @@ proc toDecimal64*(ieeeSignificand: uint64; ieeeExponent: uint64): FloatingDecima
## ToChars
## ==================================================================================================
proc utoa2Digits*(buf: var openArray[char]; pos: int; digits: uint32) {.inline.} =
const
digits100: array[200, char] = ['0', '0', '0', '1', '0', '2', '0', '3', '0', '4', '0', '5',
'0', '6', '0', '7', '0', '8', '0', '9', '1', '0', '1', '1', '1', '2', '1', '3', '1', '4',
'1', '5', '1', '6', '1', '7', '1', '8', '1', '9', '2', '0', '2', '1', '2', '2', '2', '3',
'2', '4', '2', '5', '2', '6', '2', '7', '2', '8', '2', '9', '3', '0', '3', '1', '3', '2',
'3', '3', '3', '4', '3', '5', '3', '6', '3', '7', '3', '8', '3', '9', '4', '0', '4', '1',
'4', '2', '4', '3', '4', '4', '4', '5', '4', '6', '4', '7', '4', '8', '4', '9', '5', '0',
'5', '1', '5', '2', '5', '3', '5', '4', '5', '5', '5', '6', '5', '7', '5', '8', '5', '9',
'6', '0', '6', '1', '6', '2', '6', '3', '6', '4', '6', '5', '6', '6', '6', '7', '6', '8',
'6', '9', '7', '0', '7', '1', '7', '2', '7', '3', '7', '4', '7', '5', '7', '6', '7', '7',
'7', '8', '7', '9', '8', '0', '8', '1', '8', '2', '8', '3', '8', '4', '8', '5', '8', '6',
'8', '7', '8', '8', '8', '9', '9', '0', '9', '1', '9', '2', '9', '3', '9', '4', '9', '5',
'9', '6', '9', '7', '9', '8', '9', '9']
dragonbox_Assert(digits <= 99)
buf[pos] = digits100[2 * digits]
buf[pos+1] = digits100[2 * digits + 1]
#copyMem(buf, unsafeAddr(digits100[2 * digits]), 2 * sizeof((char)))
proc trailingZeros2Digits*(digits: uint32): int32 {.inline.} =
const
trailingZeros100: array[100, int8] = [2'i8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
0, 0, 0, 0, 0, 0]
dragonbox_Assert(digits <= 99)
return trailingZeros100[digits]
when false:
template `+!`(x: cstring; offset: int): cstring = cast[cstring](cast[uint](x) + uint(offset))