dev-cpp-users

[Dev-C++] form binary data to unisgned int

[Riccardo R. <ric...@ir...>]

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

Re: [Dev-C++] form binary data to unisgned int

[Per W. <pw...@ia...>]

If  you are lazy, and the data is in correct byte order, then you can do:

char readbuf[100];
unsigned int n;

n = *(unsigned int*)&readbuf[pos];

However, to make sure that the program works independent on processor
architecture, you should do something like:

n = ((unsigned)buf[pos])
  + (((unsigned)buf[pos+1]) << 8)
  + (((unsigned)buf[pos+2]) << 16)
  + (((unsigned)buf[pos+3]) << 24);
pos += 4;

Adjust order of bytes depending on how the file was saved.

/Per W

On Thu, 23 Mar 2006, Riccardo Roasio wrote:

> 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
>
>
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