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