Classic/Legacy CodeWarriorのトピックRe: Convert String to an Integer

Convert String to an Integer

RoboMan — Fri, 03 Nov 2006 01:45:31 GMT

I was wondering how one would convert a string to an integer. I see that it doesn't seem codewarrior supports the atoi command. Thanks in advance.

Re: Convert String to an Integer

pittbull — Fri, 03 Nov 2006 21:27:00 GMT

Hello,
I don't know if CW has it, but you can code it yourself. It is very simple. Look at this: http://src.opensolaris.org/source/xref/onnv/onnv-gate/usr/src/lib/libc/port/gen/atoi.c

Re: Convert String to an Integer

mudy — Fri, 03 Nov 2006 22:45:06 GMT

If the string represents an hex number you can use this code:

unsigned int atoin(char s[])
{
int i;
unsigned int n;
n = 0;
i=0;

while(s[i]!='\0'){
//for (i = 0; s[i]!='\0'; i++){

if ((s[i] >= '0') && (s[i]  (minor)= '9')){
   n = (16 * n) +(s[i] - '0');}
else{
   n = (16 * n) +(s[i] - 'A' + 10);}
  
i++;
}
return n;
}

mudy

Re: Convert String to an Integer

RoboMan — Sat, 04 Nov 2006 01:45:55 GMT

Thanks for the code. I did find codewarrior has an atoi function, i had just used it incorrectly the first time. Thanks again.

Josh

Re: Convert String to an Integer

mjbcswitzerland — Tue, 07 Nov 2006 03:23:11 GMT

Hi mudy

The code requires HEX ASCII string to be coded with capitals.
There is a simple trick to make it case independent.

When the character is not between '0' and '9' try this:

n = (16 * n) + ((s[i] - ('a' - '9' - 1)) & 0x0f);

Regards

Mark Butcher
www.mjbc.ch / www.uTasker.com

Re: Convert String to an Integer

mudy — Wed, 08 Nov 2006 17:07:32 GMT

Hi mjbcswitzerland!

Thanks!!

regards

mudy