Attribute original code, closes #80

Author: maciejhirsz

src/codegen.rs

@@ -3,7 +3,7 @@ use std::io::Write;
 use JsonValue;
 use number::Number;
 
-use util::write::write;
+use util::print_dec;
 
 const QU: u8 = b'"';
 const BS: u8 = b'\\';
@@ -104,7 +104,12 @@ pub trait Generator {
         }
         let (positive, mantissa, exponent) = num.as_parts();
         unsafe {
-            write(self.get_writer(), positive, mantissa, exponent).unwrap();
+            print_dec::write(
+                self.get_writer(),
+                positive,
+                mantissa,
+                exponent
+            ).unwrap();
         }
     }
 

src/number.rs

@@ -1,7 +1,7 @@
 use std::{ ops, fmt, f32, f64 };
 use std::num::FpCategory;
 use util::grisu2;
-use util::write::write;
+use util::print_dec;
 
 /// NaN value represented in `Number` type. NaN is equal to itself.
 pub const NAN: Number = Number {
@@ -203,7 +203,7 @@ impl fmt::Display for Number {
             }
             let (positive, mantissa, exponent) = self.as_parts();
             let mut buf = Vec::new();
-            write(&mut buf, positive, mantissa, exponent).unwrap();
+            print_dec::write(&mut buf, positive, mantissa, exponent).unwrap();
             f.write_str(&String::from_utf8_unchecked(buf))
         }
     }

src/util/diyfp.rs

@@ -1,3 +1,6 @@
+// This file comes from the `dtoa` port by David Tolnay:
+// https://github.com/dtolnay/dtoa
+//
 // Copyright 2016 Dtoa Developers
 //
 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or

src/util/grisu2.rs

@@ -1,3 +1,20 @@
+// This file comes from the `dtoa` port by David Tolnay:
+// https://github.com/dtolnay/dtoa
+//
+// It's an implementation of a Grisu2 algorithm by Florian Loitsch:
+// http://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf
+//
+// The algorithm here has been modified to produce a `u64` mantisa and
+// a decimal exponent instead of writing to a string.
+//
+// Copyright 2016 Dtoa Developers
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
 use util::diyfp::{ self, DiyFp };
 
 #[inline]

src/util/mod.rs

@@ -1,3 +1,3 @@
 pub mod diyfp;
 pub mod grisu2;
-pub mod write;
+pub mod print_dec;

src/util/write.rs renamed to src/util/print_dec.rs

@@ -1,3 +1,11 @@
+// This is a modified version of the `itoa` crate by David Tolnay:
+// https://github.com/dtolnay/itoa
+//
+// The crate itself borrows code from the stdlib of Rust.
+//
+// The algorithm here was modified from being able to just writing integers,
+// to printing decimal floating points.
+
 use std::{io, mem, ptr, slice};
 
 const DEC_DIGITS_LUT: &'static[u8] =