69 lines
2.1 KiB
C
69 lines
2.1 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_nd_round.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: igarbuz <marvin@42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2019/01/29 20:07:19 by igarbuz #+# #+# */
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/* Updated: 2019/01/29 20:07:22 by igarbuz ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "ft_printf.h"
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static void ft_round_up(uint32_t *nd, int ndlo)
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{
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while (nd[ndlo & 127] >= 1000000000)
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{
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ndlo++;
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nd[ndlo & 127] += 1;
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}
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}
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static void ft_round_ndlo(int r, int rloc, int *ndlo)
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{
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if (!r)
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*ndlo = 0;
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else if (!rloc && -*ndlo * 9 >= r)
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*ndlo = -r / 9;
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else if (rloc && -*ndlo * 9 >= r)
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*ndlo = -r / 9 - 1;
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}
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static int ft_round_last(int ndlo, int r, uint32_t *nd)
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{
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int rloc;
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int tlo;
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tlo = ndlo;
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rloc = (r % 9);
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ft_round_ndlo(r, rloc, &ndlo);
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if (((r / 9) + 1) == -tlo && !(nd[tlo & 127] % g_pow10[8 - rloc]))
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{
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if (rloc && (nd[ndlo & 127] / g_pow10[9 - rloc] % 10) & 1
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&& (nd[ndlo & 127] / g_pow10[8 - rloc]) % 10 == 5)
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nd[ndlo & 127] += g_pow10[9 - rloc];
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else if (!rloc && (tlo <= ndlo - 1) && (nd[ndlo & 127] % 10) & 1
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&& nd[(ndlo - 1) & 127] / g_pow10[8] == 5)
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nd[ndlo & 127] += 1;
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}
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else
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{
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if (rloc && (nd[ndlo & 127] / g_pow10[8 - rloc]) % 10 >= 5)
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nd[ndlo & 127] += g_pow10[9 - rloc];
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else if (!rloc && (tlo <= ndlo - 1)
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&& nd[(ndlo - 1) & 127] / g_pow10[8] >= 5)
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nd[ndlo & 127] += 1;
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}
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return (ndlo);
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}
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void ft_round(t_nd *nd, int *r)
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{
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if (*r > -nd->lo * 9)
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*r = -nd->lo * 9;
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nd->lo = ft_round_last(nd->lo, *r, nd->n);
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ft_round_up(nd->n, nd->lo);
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}
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