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39 lines
646 B
C
39 lines
646 B
C
/* $NetBSD: octtoint.c,v 1.6 2015/07/10 14:20:32 christos Exp $ */
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/*
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* octtoint - convert an ascii string in octal to an unsigned
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* long, with error checking
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*/
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#include <config.h>
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#include <stdio.h>
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#include <ctype.h>
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#include "ntp_stdlib.h"
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int
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octtoint(
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const char *str,
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u_long *ival
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)
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{
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register u_long u;
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register const char *cp;
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cp = str;
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if (*cp == '\0')
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return 0;
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u = 0;
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while (*cp != '\0') {
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if (!isdigit((unsigned char)*cp) || *cp == '8' || *cp == '9')
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return 0;
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if (u >= 0x20000000)
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return 0; /* overflow */
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u <<= 3;
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u += *cp++ - '0'; /* ascii dependent */
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}
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*ival = u;
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return 1;
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}
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