The Tor Browser: config/string-format.js@97036ab72558

Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.

     1 /* This Source Code Form is subject to the terms of the Mozilla Public

     2  * License, v. 2.0. If a copy of the MPL was not distributed with this

     3  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

     5 String.prototype.format = function string_format() {

     6   // there are two modes of operation... unnamed indices are read in order;

     7   // named indices using %(name)s. The two styles cannot be mixed.

     8   // Unnamed indices can be passed as either a single argument to this function,

     9   // multiple arguments to this function, or as a single array argument

    10   let curindex = 0;

    11   let d;

    13   if (arguments.length > 1) {

    14     d = arguments;

    15   }

    16   else

    17     d = arguments[0];

    19   function r(s, key, type) {

    20     if (type == '%')

    21       return '%';

    23     let v;

    24     if (key == "") {

    25       if (curindex == -1)

    26         throw Error("Cannot mix named and positional indices in string formatting.");

    28       if (curindex == 0 && (!(d instanceof Object) || !(0 in d))) {

    29         v = d;

    30       }

    31       else if (!(curindex in d))

    32         throw Error("Insufficient number of items in format, requesting item %i".format(curindex));

    33       else {

    34         v = d[curindex];

    35       }

    37       ++curindex;

    38     }

    39     else {

    40       key = key.slice(1, -1);

    41       if (curindex > 0)

    42         throw Error("Cannot mix named and positional indices in string formatting.");

    43       curindex = -1;

    45       if (!(key in d))

    46         throw Error("Key '%s' not present during string substitution.".format(key));

    47       v = d[key];

    48     }

    49     switch (type) {

    50     case "s":

    51       if (v === undefined)

    52         return "<undefined>";

    53       return v.toString();

    54     case "r":

    55       return uneval(v);

    56     case "i":

    57       return parseInt(v);

    58     case "f":

    59       return Number(v);

    60     default:

    61       throw Error("Unexpected format character '%s'.".format(type));

    62     }

    63   }

    64   return this.replace(/%(\([^)]+\))?(.)/g, r);

    65 };

The Tor Browser / file revision

config/string-format.js@97036ab72558

config/string-format.js