JavaScript rewind

Rewind the position of a file pointer

function rewind (handle) {
    // Rewind the position of a file pointer  
    // 
    // version: 909.322
    // discuss at: http://phpjs.org/functions/rewind    // +   original by: Brett Zamir (http://brett-zamir.me)
    // *     example 1: var h = fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r');
    // *     example 1: fread(h, 100);
    // *     example 1: rewind(h);
    // *     returns 1: true 
    var getFuncName = function (fn) {
        var name = (/\W*function\s+([\w\$]+)\s*\(/).exec(fn);
        if (!name) {
            return '(Anonymous)';        }
        return name[1];
    };
    if (!this.php_js || !this.php_js.resourceData || !this.php_js.resourceDataPointer ||
            !handle || !handle.constructor || getFuncName(handle.constructor) !== 'PHPJS_Resource') {        return false;
    }
    this.php_js.resourceDataPointer[handle.id] = 0;
    return true;
}

external links: original PHP docs | raw js source

Examples

Running

1
2
3

var h = fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r');
fread(h, 100);
rewind(h);

Should return

true

Dependencies

No dependencies, you can use this function standalone.

Open syntax issues

php.js uses JsLint to help us keep our code consistent and prevent some common bugs.

Eventually we want all code to pass or at least take into consideration most fixes suggested by JsLint, following this JsLint configuration we’ve decided on.

Authors

Thanks to the following developers, you get to have rewind goodness in JavaScript.

Brett Zamir ( original )

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JavaScript rewind

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