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fix handling of default precision in formatBiggestFloat for the js backend (#7928)

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skilchen 2018-06-02 04:24:32 +02:00 • committed by Varriount
commit 91765e583d
1 changed files with 7 additions and 0 deletions
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7
lib/pure/strutils.nim
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@ -1854,6 +1854,10 @@ proc formatBiggestFloat*(f: BiggestFloat, format: FloatFormatMode = ffDefault,
## ##
## If ``precision == -1``, it tries to format it nicely. ## If ``precision == -1``, it tries to format it nicely.
when defined(js): when defined(js):
var precision = precision
if precision == -1:
# use the same default precision as c_sprintf
precision = 6
var res: cstring var res: cstring
case format case format
of ffDefault: of ffDefault:
@ -1863,6 +1867,9 @@ proc formatBiggestFloat*(f: BiggestFloat, format: FloatFormatMode = ffDefault,
of ffScientific: of ffScientific:
{.emit: "`res` = `f`.toExponential(`precision`);".} {.emit: "`res` = `f`.toExponential(`precision`);".}
result = $res result = $res
if 1.0 / f == -Inf:
# JavaScript removes the "-" from negative Zero, add it back here
result = "-" & $res
for i in 0 ..< result.len: for i in 0 ..< result.len:
# Depending on the locale either dot or comma is produced, # Depending on the locale either dot or comma is produced,
# but nothing else is possible: # but nothing else is possible: