473,387 Members | 1,569 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,387 software developers and data experts.

coverting binary data into unsigned int

1
Hi,
i have a file with a part of ASCII code and a second part with binary data that should represent unsigned int.
I found how to read the file and write on another file the same binary data, but i don't know how to convert these data into unsigned int.
Can anyone help me?
Thanks,Riccardo
Mar 23 '06 #1
1 3250
Banfa
9,065 Expert Mod 8TB
Binary data in a file is in bytes (signed or unsigned, this is just a compiler representation) an integer is normally made of either 2 or 4 bytes of data. The data in the file will have 1 of 2 endiannesses either BIG Endian or LITTLE Endian.

In big endian the most significant bytes come first, in little endian the most significant bytes come last.

For a 2 byte integer if you have read the 2 bytes from the file into the variables MSB and LSB then you can create the integer like so

unsigned int Value = ((unsigned int)MSB<<8) | LSB;

Since you haven't given the format of the file or the size of int it is hard for me to give any firther help.
Mar 23 '06 #2

Sign in to post your reply or Sign up for a free account.

Similar topics

0
by: Channing Jones | last post by:
Hello everyone, I am trying to store data in a binary field of an SQL-Server table using ADODB. So far, I have managed to store a record but not any data in the binary field. I only get...
14
by: Steven T. Hatton | last post by:
I'm trying to write a program like hexel. I guess I could fish out the source for hexel and look at that, but for now I'm trying to figure out how I can do with with std::stringstream and...
103
by: Steven T. Hatton | last post by:
§27.4.2.1.4 Type ios_base::openmode Says this about the std::ios::binary openmode flag: *binary*: perform input and output in binary mode (as opposed to text mode) And that is basically _all_ it...
2
by: Luc Holland | last post by:
Hey, I'm working on a program that reads a binary file. It's opened with ==== if ((f1=fopen(argv,"rb"))==NULL) { fprintf(stderr,"Error opening %s for reading . . .\n",argv); exit(2); } ====...
3
by: Tanuki | last post by:
Hi All: I encounter a programming problem recently. I need to read a binary file. I need to translate the binary data into useful information. I have the format at hand, like 1st byte = ID,...
28
by: wwj | last post by:
void main() { char* p="Hello"; printf("%s",p); *p='w'; printf("%s",p); }
7
by: Drake | last post by:
Well, I'm stuck in legacy land and I need a helping hand. We're trying to give some modern value-added functionality to a circa-1985 fortran proggie. The program produces a binary file, by...
4
by: Tom Van Ginneken | last post by:
Hi, I need to write binary data to a serial port. I am using this function: #include <unistd.h> ssize_t write(int fd, const void *buf, size_t count); I am able to write a alpha-numeric...
7
by: John Dann | last post by:
I'm trying to read some binary data from a file created by another program. I know the binary file format but can't change or control the format. The binary data is organised such that it should...
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
by: emmanuelkatto | last post by:
Hi All, I am Emmanuel katto from Uganda. I want to ask what challenges you've faced while migrating a website to cloud. Please let me know. Thanks! Emmanuel
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
by: Hystou | last post by:
There are some requirements for setting up RAID: 1. The motherboard and BIOS support RAID configuration. 2. The motherboard has 2 or more available SATA protocol SSD/HDD slots (including MSATA, M.2...
0
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can...
0
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers,...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.