int_to_char.c

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#include "config.h"
#include "int_to_char.h"

#include "int_size.h"

#ifndef MAX
# define MAX(a, b) (((a) > (b)) ? (a) : (b))
#endif

static char digits[] = "0123456789ABCDEF";

size_t int_to_char(long long i, char **s, unsigned int min_len, uint8_t base)
{
        unsigned short neg = 0;
        if(i < 0)
        {
                neg = 1;
                i *= -1;
        }
        size_t len = (size_t)MAX((unsigned int)int_size(i, base) + neg, min_len);
        int j = (int)len - 1;
        *s = malloc(len + 1);
        (*s)[len] = '\0';

        while(j >= 0)
        {
                (*s)[j--] = digits[i % base];
                i = (i - (i % base)) / base;
        }
        if(neg == 1)
                (*s)[0] = '-';

        return len;
}

size_t int_to_char_with_decimal(long long i, char **s, uint8_t num)
{
        size_t len;
        uint8_t n;
        len = int_to_char(i, s, num + 1, 10);
        *s = (char *)realloc(*s, len + 2);
        for(n = 0; n < num; n++)
                (*s)[len - n] = (*s)[len - 1 - n];
        (*s)[len - num] = '.';
        (*s)[len + 1] = '\0';
        return len + 1;
}