bjoernager/rust
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serialize: escaping json strings should write in batches.

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This significantly speeds up encoding json strings.
This commit is contained in:
Erick Tryzelaar 2014-07-04 16:36:49 -07:00
parent 83f9f07ec4
commit 717de500ee
1 changed files with 29 additions and 13 deletions
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42
src/libserialize/json.rs
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@ -256,21 +256,37 @@ fn io_error_to_error(io: io::IoError) -> ParserError {
pub type EncodeResult = io::IoResult<()>;
pub type DecodeResult<T> = Result<T, DecoderError>;
fn escape_bytes(writer: &mut io::Writer, s: &[u8]) -> Result<(), io::IoError> {
try!(writer.write_str("\""));
for byte in s.iter() {
match *byte {
b'"' => try!(writer.write_str("\\\"")),
b'\\' => try!(writer.write_str("\\\\")),
b'\x08' => try!(writer.write_str("\\b")),
b'\x0c' => try!(writer.write_str("\\f")),
b'\n' => try!(writer.write_str("\\n")),
b'\r' => try!(writer.write_str("\\r")),
b'\t' => try!(writer.write_str("\\t")),
_ => try!(writer.write_u8(*byte)),
pub fn escape_bytes(wr: &mut io::Writer, bytes: &[u8]) -> Result<(), io::IoError> {
try!(wr.write_str("\""));
let mut start = 0;
for (i, byte) in bytes.iter().enumerate() {
let escaped = match *byte {
b'"' => "\\\"",
b'\\' => "\\\\",
b'\x08' => "\\b",
b'\x0c' => "\\f",
b'\n' => "\\n",
b'\r' => "\\r",
b'\t' => "\\t",
_ => { continue; }
};
if start < i {
try!(wr.write(bytes.slice(start, i)));
}
try!(wr.write_str(escaped));
start = i + 1;
}
writer.write_str("\"")
if start != bytes.len() {
try!(wr.write(bytes.slice_from(start)));
}
wr.write_str("\"")
}
fn escape_str(writer: &mut io::Writer, v: &str) -> Result<(), io::IoError> {