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[Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file |
Date: |
Wed, 15 Mar 2023 14:33:47 -0400 (EDT) |
URL:
<https://savannah.gnu.org/bugs/?63931>
Summary: Binary fwrite writes incorrect data to file
Group: GNU Octave
Submitter: None
Submitted: Wed 15 Mar 2023 06:33:45 PM UTC
Category: Octave Function
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Incorrect Result
Status: None
Assigned to: None
Originator Name:
Originator Email:
Open/Closed: Open
Release: 8.1.0
Discussion Lock: Any
Operating System: Microsoft Windows
Fixed Release: None
Planned Release: None
_______________________________________________________
Follow-up Comments:
-------------------------------------------------------
Date: Wed 15 Mar 2023 06:33:45 PM UTC By: Anonymous
If you open a file for binary write and use fwrite write a vector of uint8
values to the file, some of them get changed. Specifically, writing hex A7
ends up in the file as hex 3F...
Here's a short script that generates incorrect results...
val = hex2dec('a7');
a = ones(2400,1)*val;
f = fopen('a.a','wb');
fwrite(f,a,'uint8');
fclose(f);
f = fopen('a.a','rb');
b = fread(f,2400,'uint8');
fclose(f);
a(1)
b(1)
_______________________________________________________
Reply to this item at:
<https://savannah.gnu.org/bugs/?63931>
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- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file,
anonymous <=
- Message not available
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Arun Giridhar, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Arun Giridhar, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Arun Giridhar, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15
- [Octave-bug-tracker] [bug #63931] Binary fwrite writes incorrect data to file, Dmitri A. Sergatskov, 2023/03/15