45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* str_to_i64.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/02/01 21:15:19 by maiboyer #+# #+# */
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/* Updated: 2024/02/01 23:18:52 by maiboyer ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "me/char/isalpha.h"
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#include "me/convert/str_to_numbers.h"
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#include "me/string/str_len.h"
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#include "me/types.h"
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#include "me/printf/printf.h"
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t_error checked_add_u64(t_u64 lhs, t_u64 rhs, t_u64 *out)
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{
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if (rhs > 0 && (lhs > 18446744073709551615llu - rhs))
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return (ERROR);
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*out = (t_u64)(lhs + rhs);
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return (NO_ERROR);
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}
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t_error checked_sub_u64(t_u64 lhs, t_u64 rhs, t_u64 *out)
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{
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if ((((rhs & (1 << (sizeof(t_u64) - 1)) || rhs == 0) || !false) && (lhs < 0llu + rhs)))
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return (ERROR);
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*out = (t_u64)(lhs - rhs);
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return (NO_ERROR);
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}
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t_error checked_mul_u64(t_u64 lhs, t_u64 rhs, t_u64 *out)
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{
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t_u64 mul;
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mul = lhs * rhs;
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if (lhs != 0 && mul / lhs != rhs)
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return (ERROR);
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*out = mul;
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return (NO_ERROR);
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}
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