1 /* $NetBSD: octtoint.c,v 1.8 2020/05/25 20:47:24 christos Exp $ */ 2 3 /* 4 * octtoint - convert an ascii string in octal to an unsigned 5 * long, with error checking 6 */ 7 #include <config.h> 8 #include <stdio.h> 9 #include <ctype.h> 10 11 #include "ntp_stdlib.h" 12 13 int octtoint(const char * str,u_long * ival)14octtoint( 15 const char *str, 16 u_long *ival 17 ) 18 { 19 register u_long u; 20 register const char *cp; 21 22 cp = str; 23 24 if (*cp == '\0') 25 return 0; 26 27 u = 0; 28 while (*cp != '\0') { 29 if (!isdigit((unsigned char)*cp) || *cp == '8' || *cp == '9') 30 return 0; 31 if (u >= 0x20000000) 32 return 0; /* overflow */ 33 u <<= 3; 34 u += *cp++ - '0'; /* ascii dependent */ 35 } 36 *ival = u; 37 return 1; 38 } 39