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jsonh.js
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executable file
·91 lines (84 loc) · 3.41 KB
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exports = module.exports = function () { "use strict"; // if you want
/**
* Copyright (C) 2011 by Andrea Giammarchi, @WebReflection
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
var // returns a generic object defined properties
Object_keys = Object.keys || function (o) {
var keys = [], key;
for (key in o) o.hasOwnProperty(key) && keys.push(key);
return keys;
},
// define later, mifiers friendly + self bound
JSONH
;
return JSONH = {
// transforms [{a:"A"},{a:"B"}] to [1,"a","A","B"]
pack: function pack(list) {
for (var
length = list.length,
// defined properties (out of one object is enough)
keys = Object_keys(length ? list[0] : {}),
klength = keys.length,
// static length stack of JS values
result = Array(length * klength),
i = 0,
j = 0,
ki, o;
i < length; ++i
) {
for (
o = list[i], ki = 0;
ki < klength;
result[j++] = o[keys[ki++]]
);
}
// keys.length, keys, result
return [klength].concat(keys, result);
},
// JSONH.unpack after JSON.parse
parse: function parse(hlist, reviver) {
return JSONH.unpack(JSON.parse(hlist, reviver));
},
// JSON.stringify after JSONH.pack
stringify: function stringify(list, replacer, space) {
return JSON.stringify(JSONH.pack(list), replacer, space);
},
// transforms [1,"a","A","B"] to [{a:"A"},{a:"B"}]
unpack : function unpack(hlist) {
for (var
length = hlist.length,
klength = hlist[0],
result = Array(((length - klength - 1) / klength) || 0),
i = 1 + klength,
j = 0,
ki, o;
i < length;
) {
for (
result[j++] = (o = {}), ki = 0;
ki < klength;
o[hlist[++ki]] = hlist[i++]
);
}
return result;
}
};
}();