URL:
<http://savannah.gnu.org/bugs/?35670>
Summary: NSJSONSerialization writes unnecessary decimals
after ints
Project: GNUstep
Submitted by: snej
Submitted on: Wed 29 Feb 2012 07:51:13 PM GMT
Category: Base/Foundation
Severity: 3 - Normal
Item Group: Bug
Status: None
Privacy: Public
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
_______________________________________________________
Details:
When NSJSONSerialization encodes an integer, it writes it out in
floating-point format with five decimals, i.e. "123.00000" instead of "123".
Not a big deal, but it's unattractive and makes the JSON output longer than it
needs to be.
ANALYSIS
The writeObject() function, at NSJSONSerialization.m:832, outputs any NSNumber
by calling:
[output appendFormat: @"%f", [obj doubleValue]];
The default formatting of "%f" is five decimal places, apparently.
Changing the format string to "%g" suppresses unnecessary decimals and causes
integers to be written as integers. (See patch below.)
CONFIGURATION
URL: http://svn.gna.org/svn/gnustep/libs/base/trunk/Source
Repository Root: http://svn.gna.org/svn/gnustep
Repository UUID: 72102866-910b-0410-8b05-ffd578937521
Revision: 34837
My OS is Ubuntu 11 (current according to software update).
I'm compiling with Clang 3.1 (trunk 151546).
PATCH
Index: NSJSONSerialization.m
===================================================================
--- NSJSONSerialization.m (revision 34837)
+++ NSJSONSerialization.m (working copy)
@@ -829,7 +829,7 @@
}
else
{
- [output appendFormat: @"%f", [obj doubleValue]];
+ [output appendFormat: @"%g", [obj doubleValue]];
}
}
else if ([obj isKindOfClass: NSNullClass])
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