JavaScript ftell
Get file pointer's read/write position
1 2 3 4 56 7 8 9 1011 12 13 14 1516 17 18 19 2021 22 23 24 | function ftell (handle) { // Get file pointer's read/write position // // version: 1008.1718 // discuss at: http://phpjs.org/functions/ftell // + 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: ftell(h); // * returns 1: 99 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; } return this.php_js.resourceDataPointer[handle.id]*2-1; // We're currently storing by character, so need to multiply by two; subtract one to appear like array pointer } |
Examples
Running
1 2 3 | var h = fopen('http://kevin.vanzonneveld.net/pj_test_supportfile_1.htm', 'r'); fread(h, 100); ftell(h); |
Should return
1 | 99 |
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 ftell goodness in JavaScript.
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