str_hex_lng.c

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/* hex$ routine for long long's */

#include "fb.h"

static char hex_table[16] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

FBCALL FBSTRING *fb_HEXEx_l ( unsigned long long num, int digits )
{
        FBSTRING *s;
        int i;
        unsigned long long num2;

        if( digits <= 0 ) {
                /* Only use the minimum amount of digits needed; need to count
                   the important 4-bit (base 16) chunks in the number.
                   And if it's zero, use 1 digit for 1 zero. */
                digits = 0;
                num2 = num;
                while( num2 ) {
                        digits += 1;
                        num2 >>= 4;
                }
                if( digits == 0 )
                        digits = 1;
        }

        s = fb_hStrAllocTemp( NULL, digits );
        if( s == NULL )
                return &__fb_ctx.null_desc;

        i = digits - 1;
        while( i >= 0 ) {
                s->data[i] = hex_table[num & 0xF];
                num >>= 4;
                i -= 1;
        }

        s->data[digits] = '\0';
        return s;
}

FBCALL FBSTRING *fb_HEX_l ( unsigned long long num )
{
        return fb_HEXEx_l( num, 0 );
}