--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/static/js/jsonjs/json_parse_state.js	Tue Feb 05 14:49:34 2013 -0800
@@ -0,0 +1,397 @@
+/*
+    json_parse_state.js
+    2012-06-01
+
+    Public Domain.
+
+    NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+
+    This file creates a json_parse function.
+
+        json_parse(text, reviver)
+            This method parses a JSON text to produce an object or array.
+            It can throw a SyntaxError exception.
+
+            The optional reviver parameter is a function that can filter and
+            transform the results. It receives each of the keys and values,
+            and its return value is used instead of the original value.
+            If it returns what it received, then the structure is not modified.
+            If it returns undefined then the member is deleted.
+
+            Example:
+
+            // Parse the text. Values that look like ISO date strings will
+            // be converted to Date objects.
+
+            myData = json_parse(text, function (key, value) {
+                var a;
+                if (typeof value === 'string') {
+                    a =
+/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+                    if (a) {
+                        return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+                            +a[5], +a[6]));
+                    }
+                }
+                return value;
+            });
+
+    This is a reference implementation. You are free to copy, modify, or
+    redistribute.
+
+    This code should be minified before deployment.
+    See http://javascript.crockford.com/jsmin.html
+
+    USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+    NOT CONTROL.
+*/
+
+/*jslint regexp: false*/
+
+/*members "", "\"", ",", "\/", ":", "[", "\\", "]", acomma, avalue, b,
+    call, colon, container, exec, f, false, firstavalue, firstokey,
+    fromCharCode, go, hasOwnProperty, key, length, n, null, ocomma, okey,
+    ovalue, pop, prototype, push, r, replace, slice, state, t, test, true,
+    value, "{", "}"
+*/
+
+var json_parse = (function () {
+    "use strict";
+
+// This function creates a JSON parse function that uses a state machine rather
+// than the dangerous eval function to parse a JSON text.
+
+    var state,      // The state of the parser, one of
+                    // 'go'         The starting state
+                    // 'ok'         The final, accepting state
+                    // 'firstokey'  Ready for the first key of the object or
+                    //              the closing of an empty object
+                    // 'okey'       Ready for the next key of the object
+                    // 'colon'      Ready for the colon
+                    // 'ovalue'     Ready for the value half of a key/value pair
+                    // 'ocomma'     Ready for a comma or closing }
+                    // 'firstavalue' Ready for the first value of an array or
+                    //              an empty array
+                    // 'avalue'     Ready for the next value of an array
+                    // 'acomma'     Ready for a comma or closing ]
+        stack,      // The stack, for controlling nesting.
+        container,  // The current container object or array
+        key,        // The current key
+        value,      // The current value
+        escapes = { // Escapement translation table
+            '\\': '\\',
+            '"': '"',
+            '/': '/',
+            't': '\t',
+            'n': '\n',
+            'r': '\r',
+            'f': '\f',
+            'b': '\b'
+        },
+        string = {   // The actions for string tokens
+            go: function () {
+                state = 'ok';
+            },
+            firstokey: function () {
+                key = value;
+                state = 'colon';
+            },
+            okey: function () {
+                key = value;
+                state = 'colon';
+            },
+            ovalue: function () {
+                state = 'ocomma';
+            },
+            firstavalue: function () {
+                state = 'acomma';
+            },
+            avalue: function () {
+                state = 'acomma';
+            }
+        },
+        number = {   // The actions for number tokens
+            go: function () {
+                state = 'ok';
+            },
+            ovalue: function () {
+                state = 'ocomma';
+            },
+            firstavalue: function () {
+                state = 'acomma';
+            },
+            avalue: function () {
+                state = 'acomma';
+            }
+        },
+        action = {
+
+// The action table describes the behavior of the machine. It contains an
+// object for each token. Each object contains a method that is called when
+// a token is matched in a state. An object will lack a method for illegal
+// states.
+
+            '{': {
+                go: function () {
+                    stack.push({state: 'ok'});
+                    container = {};
+                    state = 'firstokey';
+                },
+                ovalue: function () {
+                    stack.push({container: container, state: 'ocomma', key: key});
+                    container = {};
+                    state = 'firstokey';
+                },
+                firstavalue: function () {
+                    stack.push({container: container, state: 'acomma'});
+                    container = {};
+                    state = 'firstokey';
+                },
+                avalue: function () {
+                    stack.push({container: container, state: 'acomma'});
+                    container = {};
+                    state = 'firstokey';
+                }
+            },
+            '}': {
+                firstokey: function () {
+                    var pop = stack.pop();
+                    value = container;
+                    container = pop.container;
+                    key = pop.key;
+                    state = pop.state;
+                },
+                ocomma: function () {
+                    var pop = stack.pop();
+                    container[key] = value;
+                    value = container;
+                    container = pop.container;
+                    key = pop.key;
+                    state = pop.state;
+                }
+            },
+            '[': {
+                go: function () {
+                    stack.push({state: 'ok'});
+                    container = [];
+                    state = 'firstavalue';
+                },
+                ovalue: function () {
+                    stack.push({container: container, state: 'ocomma', key: key});
+                    container = [];
+                    state = 'firstavalue';
+                },
+                firstavalue: function () {
+                    stack.push({container: container, state: 'acomma'});
+                    container = [];
+                    state = 'firstavalue';
+                },
+                avalue: function () {
+                    stack.push({container: container, state: 'acomma'});
+                    container = [];
+                    state = 'firstavalue';
+                }
+            },
+            ']': {
+                firstavalue: function () {
+                    var pop = stack.pop();
+                    value = container;
+                    container = pop.container;
+                    key = pop.key;
+                    state = pop.state;
+                },
+                acomma: function () {
+                    var pop = stack.pop();
+                    container.push(value);
+                    value = container;
+                    container = pop.container;
+                    key = pop.key;
+                    state = pop.state;
+                }
+            },
+            ':': {
+                colon: function () {
+                    if (Object.hasOwnProperty.call(container, key)) {
+                        throw new SyntaxError('Duplicate key "' + key + '"');
+                    }
+                    state = 'ovalue';
+                }
+            },
+            ',': {
+                ocomma: function () {
+                    container[key] = value;
+                    state = 'okey';
+                },
+                acomma: function () {
+                    container.push(value);
+                    state = 'avalue';
+                }
+            },
+            'true': {
+                go: function () {
+                    value = true;
+                    state = 'ok';
+                },
+                ovalue: function () {
+                    value = true;
+                    state = 'ocomma';
+                },
+                firstavalue: function () {
+                    value = true;
+                    state = 'acomma';
+                },
+                avalue: function () {
+                    value = true;
+                    state = 'acomma';
+                }
+            },
+            'false': {
+                go: function () {
+                    value = false;
+                    state = 'ok';
+                },
+                ovalue: function () {
+                    value = false;
+                    state = 'ocomma';
+                },
+                firstavalue: function () {
+                    value = false;
+                    state = 'acomma';
+                },
+                avalue: function () {
+                    value = false;
+                    state = 'acomma';
+                }
+            },
+            'null': {
+                go: function () {
+                    value = null;
+                    state = 'ok';
+                },
+                ovalue: function () {
+                    value = null;
+                    state = 'ocomma';
+                },
+                firstavalue: function () {
+                    value = null;
+                    state = 'acomma';
+                },
+                avalue: function () {
+                    value = null;
+                    state = 'acomma';
+                }
+            }
+        };
+
+    function debackslashify(text) {
+
+// Remove and replace any backslash escapement.
+
+        return text.replace(/\\(?:u(.{4})|([^u]))/g, function (a, b, c) {
+            return b ? String.fromCharCode(parseInt(b, 16)) : escapes[c];
+        });
+    }
+
+    return function (source, reviver) {
+
+// A regular expression is used to extract tokens from the JSON text.
+// The extraction process is cautious.
+
+        var r,          // The result of the exec method.
+            tx = /^[\x20\t\n\r]*(?:([,:\[\]{}]|true|false|null)|(-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?)|"((?:[^\r\n\t\\\"]|\\(?:["\\\/trnfb]|u[0-9a-fA-F]{4}))*)")/;
+
+// Set the starting state.
+
+        state = 'go';
+
+// The stack records the container, key, and state for each object or array
+// that contains another object or array while processing nested structures.
+
+        stack = [];
+
+// If any error occurs, we will catch it and ultimately throw a syntax error.
+
+        try {
+
+// For each token...
+
+            for (;;) {
+                r = tx.exec(source);
+                if (!r) {
+                    break;
+                }
+
+// r is the result array from matching the tokenizing regular expression.
+//  r[0] contains everything that matched, including any initial whitespace.
+//  r[1] contains any punctuation that was matched, or true, false, or null.
+//  r[2] contains a matched number, still in string form.
+//  r[3] contains a matched string, without quotes but with escapement.
+
+                if (r[1]) {
+
+// Token: Execute the action for this state and token.
+
+                    action[r[1]][state]();
+
+                } else if (r[2]) {
+
+// Number token: Convert the number string into a number value and execute
+// the action for this state and number.
+
+                    value = +r[2];
+                    number[state]();
+                } else {
+
+// String token: Replace the escapement sequences and execute the action for
+// this state and string.
+
+                    value = debackslashify(r[3]);
+                    string[state]();
+                }
+
+// Remove the token from the string. The loop will continue as long as there
+// are tokens. This is a slow process, but it allows the use of ^ matching,
+// which assures that no illegal tokens slip through.
+
+                source = source.slice(r[0].length);
+            }
+
+// If we find a state/token combination that is illegal, then the action will
+// cause an error. We handle the error by simply changing the state.
+
+        } catch (e) {
+            state = e;
+        }
+
+// The parsing is finished. If we are not in the final 'ok' state, or if the
+// remaining source contains anything except whitespace, then we did not have
+//a well-formed JSON text.
+
+        if (state !== 'ok' || /[^\x20\t\n\r]/.test(source)) {
+            throw state instanceof SyntaxError ? state : new SyntaxError('JSON');
+        }
+
+// If there is a reviver function, we recursively walk the new structure,
+// passing each name/value pair to the reviver function for possible
+// transformation, starting with a temporary root object that holds the current
+// value in an empty key. If there is not a reviver function, we simply return
+// that value.
+
+        return typeof reviver === 'function' ? (function walk(holder, key) {
+            var k, v, value = holder[key];
+            if (value && typeof value === 'object') {
+                for (k in value) {
+                    if (Object.prototype.hasOwnProperty.call(value, k)) {
+                        v = walk(value, k);
+                        if (v !== undefined) {
+                            value[k] = v;
+                        } else {
+                            delete value[k];
+                        }
+                    }
+                }
+            }
+            return reviver.call(holder, key, value);
+        }({'': value}, '')) : value;
+    };
+}());