mirror of
https://github.com/freebsd/freebsd-src.git
synced 2024-12-03 10:29:15 +00:00
35 lines
587 B
C
35 lines
587 B
C
/* octtoint.c,v 3.1 1993/07/06 01:08:41 jbj Exp
|
|
* octtoint - convert an ascii string in octal to an unsigned
|
|
* long, with error checking
|
|
*/
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
|
|
#include "ntp_stdlib.h"
|
|
|
|
int
|
|
octtoint(str, ival)
|
|
const char *str;
|
|
U_LONG *ival;
|
|
{
|
|
register U_LONG u;
|
|
register const char *cp;
|
|
|
|
cp = str;
|
|
|
|
if (*cp == '\0')
|
|
return 0;
|
|
|
|
u = 0;
|
|
while (*cp != '\0') {
|
|
if (!isdigit(*cp) || *cp == '8' || *cp == '9')
|
|
return 0;
|
|
if (u >= 0x20000000)
|
|
return 0; /* overflow */
|
|
u <<= 3;
|
|
u += *cp++ - '0'; /* ascii dependent */
|
|
}
|
|
*ival = u;
|
|
return 1;
|
|
}
|