[ViewVC] Diff of: cvs/JSON-XS/XS.pm

Comparing JSON-XS/XS.pm (file contents):
Revision 1.23 by root, Sun Mar 25 21:19:13 2007 UTC vs.
Revision 1.29 by root, Mon Apr 9 05:09:57 2007 UTC

 package JSON::XS;
 use strict;
 BEGIN {
-   our $VERSION = '0.8';
+   our $VERSION = '1.11';
    our @ISA = qw(Exporter);
    our @EXPORT = qw(to_json from_json objToJson jsonToObj);
    require Exporter;
    => "Hello, World!"
 =item $json = $json->shrink ([$enable])
 Perl usually over-allocates memory a bit when allocating space for
-strings.  This flag optionally resizes strings generated by either
+strings. This flag optionally resizes strings generated by either
 C<encode> or C<decode> to their minimum size possible. This can save
 memory when your JSON texts are either very very long or you have many
 short strings. It will also try to downgrade any strings to octet-form
 if possible: perl stores strings internally either in an encoding called
 UTF-X or in octet-form. The latter cannot store everything but uses less
-space in general.
+space in general (and some buggy Perl or C code might even rely on that
+internal representation being used).
+The actual definition of what shrink does might change in future versions,
+but it will always try to save space at the expense of time.
-If C<$enable> is true (or missing), the string returned by C<encode> will be shrunk-to-fit,
+If C<$enable> is true (or missing), the string returned by C<encode> will
-while all strings generated by C<decode> will also be shrunk-to-fit.
+be shrunk-to-fit, while all strings generated by C<decode> will also be
+shrunk-to-fit.
 If C<$enable> is false, then the normal perl allocation algorithms are used.
 If you work with your data, then this is likely to be faster.
 In the future, this setting might control other things, such as converting
 strings that look like integers or floats into integers or floats
 internally (there is no difference on the Perl level), saving space.
 =item $json = $json->max_depth ([$maximum_nesting_depth])
-Sets the maximum nesting level (default C<8192>) accepted while encoding
+Sets the maximum nesting level (default C<512>) accepted while encoding
 or decoding. If the JSON text or Perl data structure has an equal or
 higher nesting level then this limit, then the encoder and decoder will
 stop and croak at that point.
 Nesting level is defined by number of hash- or arrayrefs that the encoder
 =over 4
 =item hash references
 Perl hash references become JSON objects. As there is no inherent ordering
-in hash keys, they will usually be encoded in a pseudo-random order that
+in hash keys (or JSON objects), they will usually be encoded in a
-can change between runs of the same program but stays generally the same
+pseudo-random order that can change between runs of the same program but
-within a single run of a program. JSON::XS can optionally sort the hash
+stays generally the same within a single run of a program. JSON::XS can
-keys (determined by the I<canonical> flag), so the same datastructure
+optionally sort the hash keys (determined by the I<canonical> flag), so
-will serialise to the same JSON text (given same settings and version of
+the same datastructure will serialise to the same JSON text (given same
-JSON::XS), but this incurs a runtime overhead.
+settings and version of JSON::XS), but this incurs a runtime overhead
+and is only rarely useful, e.g. when you want to compare some JSON text
+against another for equality.
 =item array references
 Perl array references become JSON arrays.
+=item other references
+Other unblessed references are generally not allowed and will cause an
+exception to be thrown, except for references to the integers C<0> and
+C<1>, which get turned into C<false> and C<true> atoms in JSON. You can
+also use C<JSON::XS::false> and C<JSON::XS::true> to improve readability.
+   to_json [\0,JSON::XS::true]      # yields [false,true]
 =item blessed objects
 Blessed objects are not allowed. JSON::XS currently tries to encode their
 underlying representation (hash- or arrayref), but this behaviour might
    $x += 0;     # numify it, ensuring it will be dumped as a number
    $x *= 1;     # same thing, the choise is yours.
 You can not currently output JSON booleans or force the type in other,
 less obscure, ways. Tell me if you need this capability.
-=item circular data structures
-Those will be encoded until memory or stackspace runs out.
 =back
 =head1 COMPARISON
 usually a good indication of the size of the resources required to decode
 it into a Perl structure.
 Third, JSON::XS recurses using the C stack when decoding objects and
 arrays. The C stack is a limited resource: for instance, on my amd64
-machine with 8MB of stack size I can decode around 180k nested arrays
+machine with 8MB of stack size I can decode around 180k nested arrays but
-but only 14k nested JSON objects. If that is exceeded, the program
+only 14k nested JSON objects (due to perl itself recursing deeply on croak
+to free the temporary). If that is exceeded, the program crashes. to be
-crashes. Thats why the default nesting limit is set to 8192. If your
+conservative, the default nesting limit is set to 512. If your process
-process has a smaller stack, you should adjust this setting accordingly
+has a smaller stack, you should adjust this setting accordingly with the
-with the C<max_depth> method.
+C<max_depth> method.
 And last but least, something else could bomb you that I forgot to think
 of. In that case, you get to keep the pieces. I am alway sopen for hints,
 though...
 still relatively early in its development. If you keep reporting bugs they
 will be fixed swiftly, though.
 =cut
+sub true()  { \1 }
+sub false() { \0 }
 1;
 =head1 AUTHOR
  Marc Lehmann <schmorp@schmorp.de>

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Comparing JSON-XS/XS.pm (file contents): Revision 1.23 by root, Sun Mar 25 21:19:13 2007 UTC vs. Revision 1.29 by root, Mon Apr 9 05:09:57 2007 UTC

Diff Legend

Comparing JSON-XS/XS.pm (file contents):
Revision 1.23 by root, Sun Mar 25 21:19:13 2007 UTC vs.
Revision 1.29 by root, Mon Apr 9 05:09:57 2007 UTC