/* convert an arbitrary based number to an integer */

#include <ctype.h>

#include <stdio.h>
#include <windows.h>
#include <tools.h>

/* p points to characters, return -1 if no good characters found
 * and base is 2 <= base <= 16
 */
int
ntoi (
     char *p,
     int base
     )
{
    int i, c;
    flagType fFound;

    if (base < 2 || base > 16)
        return -1;
    i = 0;
    fFound = FALSE;
    while (c = *p++) {
        c = tolower (c);
        if (!isxdigit (c))
            break;
        if (c <= '9')
            c -= '0';
        else
            c -= 'a'-10;
        if (c >= base)
            break;
        i = i * base + c;
        fFound = TRUE;
    }
    if (fFound)
        return i;
    else
        return -1;
}