85 lines
2.1 KiB
C
85 lines
2.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* utils1.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: mcolonna <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/10/20 16:26:46 by mcolonna #+# #+# */
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/* Updated: 2024/02/12 12:59:05 by mcolonna ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "utils.h"
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#include "libtf.h"
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#include "unistd.h"
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#include <stdlib.h>
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char *ft_utoa(unsigned int n)
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{
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char first_digit[2];
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char *tmp;
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char *r;
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if (n >= 1000000000)
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first_digit[0] = n / 1000000000 + '0';
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else
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first_digit[0] = '\0';
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first_digit[1] = '\0';
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tmp = ft_itoa(n % 1000000000);
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if (!tmp)
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return (NULL);
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r = ft_strjoin(first_digit, tmp);
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free(tmp);
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return (r);
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}
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static char get_digit_at(
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unsigned long n, int i, int nb_len, const char *base)
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{
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int w;
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long long base_power;
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const int base_len = str_len(base);
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w = nb_len - i - 1;
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base_power = 1;
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while (w--)
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base_power *= base_len;
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return (base[n / base_power % base_len]);
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}
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static int get_nb_len(unsigned long n, const char *base)
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{
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int r;
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const int base_len = str_len(base);
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r = 0;
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while (n > 0)
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{
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n /= (unsigned long long)base_len;
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r++;
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}
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if (r == 0)
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r = 1;
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return (r);
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}
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char *ft_utoa_base(unsigned long n, const char *base)
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{
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int nb_len;
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char *dest;
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int i;
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nb_len = get_nb_len(n, base);
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dest = malloc((nb_len + 1) * sizeof(char));
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if (!dest)
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return (NULL);
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i = 0;
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while (i < nb_len)
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{
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dest[i] = get_digit_at(n, i, nb_len, base);
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i++;
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}
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dest[i] = '\0';
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return (dest);
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}
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