String Array to Binary Number Conversion

[Delali Dzirasa]

Does anyone know of the fastest way to convert a CString of numbers ie
"00000001" to the binary representation in an int?

for example

CString myVal = "00000001";

int myIntVal = 0;

myIntVal = CStringToBinary (myVal);

where the "CStringToBinar y" function is what I am looking to find.


the int representation should be 1 or in hex 0x01


Any help is greatly appreciated.


Delali

[Kevin Goodsell]

Re: String Array to Binary Number Conversion

Delali Dzirasa wrote:
[color=blue]
> Does anyone know of the fastest way to convert a CString of numbers ie
> "00000001" to the binary representation in an int?[/color]

Here we discuss standard C++. We don't know what 'CString' is.

http://www.slack.net/~shiva/welcome.txt

http://www.parashift.com/c++-faq-lite/

http://www.slack.net/~shiva/offtopic.txt

-Kevin
--
My email address is valid, but changes periodically.
To contact me please use the address from a recent posting.

[Mike Wahler]

Re: String Array to Binary Number Conversion


Delali Dzirasa <Delali.Dzirasa @jhuapl.edu> wrote in message
news:bjnph7$j8p $1@houston.jhua pl.edu...[color=blue]
> Does anyone know of the fastest way to convert a CString of numbers ie
> "00000001" to the binary representation in an int?[/color]

There's no 'CString' type in standard C++. I can show you
how to convert a 'std::string' containing text representing
a binary value to an integer type.

You'll need to figure out how to convert from 'CString'
to 'std::string'. This is indeed possible, look up
the 'CString' and 'std::string' member functions.


Also, since there's no way to determine the which binary
representation an implementation uses, it doesn't really make sense
to try to represent the binary pattern of a signed type
like that. So my example below uses an unsigned int instead
of signed.

[color=blue]
>
> for example
>
> CString myVal = "00000001";
>
> int myIntVal = 0;
>
> myIntVal = CStringToBinary (myVal);
>
> where the "CStringToBinar y" function is what I am looking to find.
>
>
> the int representation should be 1 or in hex 0x01
>
>
> Any help is greatly appreciated.[/color]

#include <bitset>
#include <climits>
#include <iostream>
#include <stdexcept>
#include <string>

unsigned int binstr2uint(con st std::string& s)
{
const std::string::si ze_type
max_bits(sizeof (unsigned int) * CHAR_BIT);

if(s.size() > max_bits)
throw "[binstr2uint]: Too many digits in input\n";

return (std::bitset<ma x_bits>(s).to_u long());
}

int main()
{
std::string s("101010101" );

try
{
unsigned int i(binstr2uint(s ));

std::cout << "s == " << s << '\n'
<< "i == " << i << '\n';

}
catch(const char *e)
{
std::cout << e << '\n';
}
catch(std::inva lid_argument&)
{
std::cout << "[binstr2uint]: Invalid digit in input\n";
}

return 0;
}


Output:

s == 101010101
i == 341


-Mike

[Carl Muller]

Re: String Array to Binary Number Conversion

"Delali Dzirasa" <Delali.Dzirasa @jhuapl.edu> wrote in message news:<bjnph7$j8 p$1@houston.jhu apl.edu>...[color=blue]
> Does anyone know of the fastest way to convert a CString of numbers ie
> "00000001" to the binary representation in an int?
>
> for example
>
> CString myVal = "00000001";
>
> int myIntVal = 0;
>
> myIntVal = CStringToBinary (myVal);
> where the "CStringToBinar y" function is what I am looking to find.
>
> the int representation should be 1 or in hex 0x01
> Any help is greatly appreciated.
>
> Delali[/color]

int myIntVal = 0;
const char* ptr = myVal;
while (*ptr)
myIntVal += myIntVal + (*ptr++ - '0');

Of course that only works for binary numbers :-)

[Delali Dzirasa]

Re: String Array to Binary Number Conversion

this worked great!

Thanks!
Delali

"Carl Muller" <carlmuller@hot mail.com> wrote in message
news:2dd08d44.0 309101525.de842 fd@posting.goog le.com...[color=blue]
> "Delali Dzirasa" <Delali.Dzirasa @jhuapl.edu> wrote in message[/color]
news:<bjnph7$j8 p$1@houston.jhu apl.edu>...[color=blue][color=green]
> > Does anyone know of the fastest way to convert a CString of numbers ie
> > "00000001" to the binary representation in an int?
> >
> > for example
> >
> > CString myVal = "00000001";
> >
> > int myIntVal = 0;
> >
> > myIntVal = CStringToBinary (myVal);
> > where the "CStringToBinar y" function is what I am looking to find.
> >
> > the int representation should be 1 or in hex 0x01
> > Any help is greatly appreciated.
> >
> > Delali[/color]
>
> int myIntVal = 0;
> const char* ptr = myVal;
> while (*ptr)
> myIntVal += myIntVal + (*ptr++ - '0');
>
> Of course that only works for binary numbers :-)[/color]