Values don't read right in Safari and Webkit under windows about jdataview HOT 8 CLOSED

I cannot reproduce the error :( Do you have a test file somewhere?

Here is what I did to reproduce the issue:

==== With the createBuffer facility:

On this page ( http://fooo.fr/~vjeux/github/jsWoWModelViewer/modelviewer.html ) I open up the console and tests:

var file = jDataView.createBuffer(0x7f, 0x80, 0x81, 0xff);
var view = new jDataView(file);
view.getInt8().toString(16);
>> "7f"
view.getInt8().toString(16);
>> "-80"
view.getInt8().toString(16);
>> "-7f"
view.getInt8().toString(16);
>> "-1"

==== With the jQuery Ajax plugin:

I generate a file with some values with Python.
>>> import struct
>>> f = open('test.bin', 'wb')
>>> f.write(struct.pack('B', 0x7f))
>>> f.write(struct.pack('B', 0x80))
>>> f.write(struct.pack('B', 0x81))
>>> f.write(struct.pack('B', 0xff))
>>> f.close()
http://fooo.fr/~vjeux/github/jsWoWModelViewer/test.bin

Then on this page ( http://fooo.fr/~vjeux/github/jsWoWModelViewer/modelviewer.html ) I open up the console and tests:

$.get(
  'test.bin',
  function (data) {
    var view = new jDataView(data);
    console.log(view.getInt8().toString(16)); // 7f
    console.log(view.getInt8().toString(16)); // -80
    console.log(view.getInt8().toString(16)); // -7f
    console.log(view.getInt8().toString(16)); // -1
  },
  'binary'
);

from jdataview.

It's strange, the behavior seems to be intermittent, I was able to replicate it using the test procedure from your web page but right now, the error doesn't always happen (while running the same code)... Even though it sometime gives back the right results, here is what I got using webkit nightly builds earlier :

$.get(
'test.bin',
function (data) {
var view = new jDataView(data);
console.log(view.getInt8().toString(16)); // 7f
console.log(view.getInt8().toString(16)); // -80
console.log(view.getInt8().toString(16)); // -7f
console.log(view.getInt8().toString(16)); // -1
},
'binary'
);
XMLHttpRequest
7f
-3
-3
-3

from jdataview.

This is really weird!

I tried with the latest Windows version of Safari 5.0.4 (7533.20.27) and the latest Windows version of webkit (r82477) and I am unable to reproduce the issue.

Maybe (big maybe) this only happens on 64bits version of Windows? I'm running a 32bit one.

from jdataview.

Maybe... I'm on a 64bin win7 and I got the error with latest nightly builts of webkit for sure and maybe on safari.

from jdataview.

When it bugs, can you try

$.get( 'test.bin', function (data) {
  var view = new jDataView(data);
  console.log('arrayBuffer?', view._isArrayBuffer);
  console.log('dataView?', view._isDataView);
}, 'binary' );

and tell me the results. It will tell me which code is being used (string, arraybuffer or dataview). I will get a better view of the problem.

from jdataview.

arrayBuffer? false
dataView? false

from jdataview.

I have made some updates. Can you retest please?

from jdataview.

Ok, I'll be testing that today.

Date: Fri, 8 Apr 2011 03:05:51 -0700
From: [email protected]
To: [email protected]
Subject: Re: [GitHub] Values don't read right in Safari and Webkit under windows [vjeux/jsDataView GH-1]

I have made some updates. Can you retest please?

Reply to this email directly or view it on GitHub:
https://github.com/vjeux/jsDataView/issues/1#comment_973063

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