astoi() - converts ASCII to integer
#include <schily/schily.h>
char *astoi(string,result)
char *string; /* the string to convert */
int *result; /* where to store the result */
astoi() converts the characters pointed to by string to an integer stored at
result. It returns a pointer to the first character in the string that
was not used for the conversion. If the entire string is to be used, it should
point to a NULL character ('\0'). Leading spaces and tabs are skipped.
The ASCII string accepts a leading `+' or `-'. A leading zero in
the string makes the number octal, while a leading 0x makes the number
hexadecimal. Leading spaces and tabs are skipped.
Returns a pointer to the first unused character.
if (*astoi(string, &i) != '\0')
error("Not a number %s\n", string);
Range errors are not checked. Conversion stops (and a pointer is returned) at
the first non-numeric character other than the leading sign or 0x, as
described above.