__XTOA_T.cpp

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/***
* xtoa.c - convert integers/longs to ASCII string
*
*   Copyright (c) 1989-1997, Microsoft Corporation. All rights reserved.
*
* Purpose:
*   The module has code to convert integers/longs to ASCII strings.  See
*
*******************************************************************************/
#ifdef __DCL_INTERNAL__
 
static void XTOA (
    unsigned INT_T val,
    CHAR_T *buf,
    unsigned radix,
    int is_neg
    )
{
    CHAR_T *p;                /* pointer to traverse string */
    CHAR_T *firstdig;     /* pointer to first digit */
    CHAR_T temp;          /* temp char */
    unsigned digval;        /* value of digit */
 
    p = buf;
 
    if (is_neg) {
        *p++ = '-';         /* negative, so output '-' and negate */
        val = (unsigned INT_T)(-(INT_T)val);
    }
 
    firstdig = p;           /* save pointer to first digit */
 
    do {
        digval = (unsigned) (val % radix);
        val /= radix;       /* get next digit */
 
        /* convert to ascii and store */
        if (digval > 9)
            *p++ = (CHAR_T) (digval - 10 + 'a');  /* a letter */
        else
            *p++ = (CHAR_T) (digval + '0');       /* a digit */
    } while (val > 0);
 
    /* We now have the digit of the number in the buffer, but in reverse
        order. Thus we reverse them now. */
 
    *p-- = '\0';            /* terminate string; p points to last digit */
 
    do {
        temp = *p;
        *p = *firstdig;
        *firstdig = temp;   /* swap *p and *firstdig */
        --p;
        ++firstdig;         /* advance to next two digits */
    } while (firstdig < p); /* repeat until halfway */
}
 
#endif      // #ifdef __DCL_INTERNAL__