/contrib/ntp/libntp/octtoint.c
https://bitbucket.org/freebsd/freebsd-head/ · C · 35 lines · 26 code · 5 blank · 4 comment · 10 complexity · ab12b8e29808821e212092c43de4a9cd MD5 · raw file
- /*
- * 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(
- 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((int)*cp) || *cp == '8' || *cp == '9')
- return 0;
- if (u >= 0x20000000)
- return 0; /* overflow */
- u <<= 3;
- u += *cp++ - '0'; /* ascii dependent */
- }
- *ival = u;
- return 1;
- }