80 lines
1.8 KiB
C
80 lines
1.8 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_ltoa_base.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: gbaconni <gbaconni@42lausanne.ch> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2021/08/16 13:51:16 by gbaconni #+# #+# */
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/* Updated: 2022/04/15 20:20:23 by gbaconni ### lausanne.ch */
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/* */
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/* ************************************************************************** */
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#include "libftprintf.h"
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static long ft_longlen_base(long n, long nbase);
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static char *ft_strrev(char *s);
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char *ft_ltoa_base(long n, char *base)
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{
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char *s;
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int i;
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long nbr;
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long nbase;
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nbase = ft_strlen(base);
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s = (char *) ft_calloc((ft_longlen_base(n, nbase) + 1), sizeof(char));
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if (s == NULL)
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return (NULL);
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i = 0;
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nbr = n;
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if (nbr == 0)
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s[i++] = '0';
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if (nbr < 0)
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nbr = -nbr;
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while (nbr > 0)
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{
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s[i++] = base[nbr % nbase];
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nbr /= nbase;
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}
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if (n < 0)
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s[i++] = '-';
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s[i] = '\0';
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return (ft_strrev(s));
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}
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static long ft_longlen_base(long n, long nbase)
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{
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size_t len;
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len = 0;
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if (n < 0 || n == 0)
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len++;
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while (!(n < 1 && n > -1))
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{
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n /= nbase;
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len++;
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}
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return (len);
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}
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static char *ft_strrev(char *s)
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{
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int len;
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int i;
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int j;
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char c;
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len = ft_strlen(s);
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i = 0;
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while (i < (len / 2))
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{
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j = len - 1 - i;
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c = s[i];
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s[i] = s[j];
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s[j] = c;
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i++;
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}
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return (s);
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}
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