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write spaces in batches

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This commit is contained in:
Erick Tryzelaar 2014-07-04 16:53:23 -07:00
parent c83d38ce79
commit 076a35075a
1 changed files with 13 additions and 4 deletions
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17
json.rs
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@ -792,11 +792,20 @@ fn fmt_f64_or_null<W: Writer>(wr: &mut W, v: f64) -> IoResult<()> {
}
}
fn spaces<W: Writer>(wr: &mut W, n: uint) -> IoResult<()> {
for _ in range(0, n) {
try!(wr.write_str(" "));
fn spaces<W: Writer>(wr: &mut W, mut n: uint) -> IoResult<()> {
static len: uint = 16;
static buf: [u8, ..len] = [b' ', ..len];
while n >= buf.len() {
try!(wr.write(buf));
n -= buf.len();
}
if n > 0 {
wr.write(buf.slice_to(n))
} else {
Ok(())
}
Ok(())
}
#[deriving(Show)]