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streams.ssWriteData: calling setLen only when new data truely increases the underlying string buffer

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2015-03-01 00:33:40 +08:00
parent 549920a85f
commit f9b2f9565c
1 changed files with 5 additions and 3 deletions
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8
lib/pure/streams.nim
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@@ -224,10 +224,12 @@ proc ssReadData(s: Stream, buffer: pointer, bufLen: int): int =
proc ssWriteData(s: Stream, buffer: pointer, bufLen: int) =
var s = StringStream(s)
if bufLen > 0:
if bufLen <= 0:
return
if s.pos + bufLen > s.data.len():
setLen(s.data, s.data.len + bufLen)
copyMem(addr(s.data[s.pos]), buffer, bufLen)
inc(s.pos, bufLen)
copyMem(addr(s.data[s.pos]), buffer, bufLen)
inc(s.pos, bufLen)
proc ssClose(s: Stream) =
var s = StringStream(s)