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/*
** HEXORINT.C - Detect if a string denotes a hex or decimal
** number by detecting a leading "0X" or trailing "H" string.
**
** public domain demo by Bob Stout
*/
#include <stdlib.h>
#include <string.h>
#undef NUL
#define NUL '\0'
#define LAST_CHAR(s) (((char *)s)[strlen(s) - 1])
/*
** Let strtol() do most of the work
*/
long hexorint(const char *string)
{
int radix = 0;
char *dummy, valstr[128];
strcpy(valstr, string);
if (strchr("Hh", LAST_CHAR(valstr)))
{
LAST_CHAR(valstr) = NUL;
radix = 16;
}
return strtol(valstr, &dummy, radix);
}
/*
** Test code follows - compile with TEST macro defined to test
*/
#ifdef TEST
#include <stdio.h>
main(int argc, char *argv[])
{
long val;
while (--argc)
{
val = hexorint(*(++argv));
printf("Value of %s = %ld = %#lx\n", *argv, val, val);
}
return EXIT_SUCCESS;
}
#endif /* TEST */
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