iostream - BYTE array

[Joy Maitland]

how to use <iostreamto read a file to a const BYTE array?

const BYTE *pbBinary

[Maxim Yegorushkin]

Re: iostream - BYTE array

On Nov 19, 9:13 am, Joy Maitland <iiu...@yahoo.c omwrote:

how to use <iostreamto read a file to a const BYTE array?
>
const BYTE *pbBinary

You don't normally read a file into a pointer. You read a file into an
array and point that pointer to that array:

#include <iostream>
#include <vector>
#include <iterator>

int main()
{
typedef unsigned char BYTE;
// read from std::cin
std::vector<BYT Ebytes(
(std::istreambu f_iterator<char >(std::cin))
, (std::istreambu f_iterator<char >())
);
if(bytes.empty( ))
; // no bytes have been read

BYTE const* pbBinary = &bytes[0];
}

--
Max

[Joy Maitland]

Re: iostream - BYTE array

why when i change the code from std::cin to read from file
c:/test2.xml I got error

=============== ========
typedef unsigned char BYTE;
std::ofstream file1("c:/test2.xml");

// read from std::cin
std::vector<BYT Ebytes(
(std::istreambu f_iterator<char >(file1))
, (std::istreambu f_iterator<char >())
);
if(bytes.empty( ))
; // no bytes have been read

BYTE const* pbBinary = &bytes[0];

=============== ============

1>d:\snd\remote \remotedemo\app \virtualawear\m ain.cpp(31) : error
C2440: '<function-style-cast>' : cannot convert from 'std::ofstream'
to 'std::istreambu f_iterator<_Ele m,_Traits>'
1 with
1 [
1 _Elem=char,
1 _Traits=std::ch ar_traits<char>
1 ]
1 No constructor could take the source type, or constructor
overload resolution was ambiguous

=============== =============






On Wed, 19 Nov 2008 01:22:44 -0800 (PST), Maxim Yegorushkin
<maxim.yegorush kin@gmail.comwr ote:

>On Nov 19, 9:13?am, Joy Maitland <iiu...@yahoo.c omwrote:

>how to use <iostreamto read a file to a const BYTE array?
>>
>const BYTE *pbBinary

>
>You don't normally read a file into a pointer. You read a file into an
>array and point that pointer to that array:
>
#include <iostream>
#include <vector>
#include <iterator>
>
int main()
{
typedef unsigned char BYTE;
// read from std::cin
std::vector<BYT Ebytes(
(std::istreambu f_iterator<char >(std::cin))
, (std::istreambu f_iterator<char >())
);
if(bytes.empty( ))
; // no bytes have been read
>
BYTE const* pbBinary = &bytes[0];
}

[Maxim Yegorushkin]

Re: iostream - BYTE array

On Nov 19, 9:36 am, Joy Maitland <iiu...@yahoo.c omwrote:

why when i change the code from std::cin to read from file
c:/test2.xml  I got error
>
=============== ========
typedef unsigned char BYTE;
                std::ofstream file1("c:/test2.xml");

Becuase you are using an output stream, rather than an input. Change
ofstream to ifstream.

--
Max