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/* Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
*/
#include <ctype.h>
#include <string.h>
#define import_spp
#define import_libc
#include <iraf.h>
#define tointeg(c) ((c)-'0')
/* ATOI -- Ascii to integer. Convert a simple integer in decimal radix to
** a binary integer value.
*/
int
atoi (char *str)
{
register char *ip = str;
register int ch, ival;
int neg;
if (*str == EOS)
return (0);
/* Skip leading whitespace. */
while (isspace (*ip))
ip++;
/* Check for indefinite. */
if ((ch = *ip) == 'I')
if (strncmp (ip, "INDEF", 5) == 0)
if (! (isalnum (ch = *(ip+5)) || ch == '_'))
return (INDEFI);
/* Check for leading + or - sign. */
neg = 0;
if (ch == '-') {
neg++;
ip++;
} else if (ch == '+')
ip++;
/* Accumulate sequence of digits. */
ival = 0;
while (isdigit (ch = *ip++))
ival = ival * 10 + tointeg(ch);
return (neg ? -ival : ival);
}
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