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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* ft_dstrgrow.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/04/03 14:17:09 by charles #+# #+# */
/* Updated: 2020/04/04 19:56:26 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "libft_dstr.h"
#define FT_DSTR_GROWTH_FACTOR 1.5
/*
** \brief Grow the capacity of a dynamic string
** \param dstr Dynamic string to grow
** \param at_least Minimum capacity - 1 required
** \return Passed dynamic string or NULL on error
*/
t_ftdstr *ft_dstrgrow(t_ftdstr *dstr, size_t at_least)
{
size_t new_capacity;
char *new_str;
if (at_least < dstr->capacity - 1)
return (dstr);
new_capacity = dstr->capacity <= 1 ? 2 : dstr->capacity;
while (at_least > new_capacity - 1)
new_capacity *= FT_DSTR_GROWTH_FACTOR;
if ((new_str = (char*)malloc(sizeof(char) * new_capacity)) == NULL)
return (NULL);
ft_memcpy(new_str, dstr->str, dstr->capacity);
dstr->capacity = new_capacity;
free(dstr->str);
dstr->str = new_str;
return (dstr);
}
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