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authorCharles Cabergs <me@cacharle.xyz>2020-10-11 15:52:52 +0200
committerCharles Cabergs <me@cacharle.xyz>2020-10-11 15:52:52 +0200
commitc98de126d2252fe47dc2a9094a5f9a8fa6b4b60a (patch)
tree12f1c827ee063ed3e7038f6a704014e611e4f388 /libft/src/dstr/ft_dstrgrow.c
parenta4ceb5974d1b7dcdd12cc81b7eb07893ea16c8ad (diff)
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Removing libft/minishell_test submodules, Removing subject/README/etc
Diffstat (limited to 'libft/src/dstr/ft_dstrgrow.c')
-rw-r--r--libft/src/dstr/ft_dstrgrow.c41
1 files changed, 41 insertions, 0 deletions
diff --git a/libft/src/dstr/ft_dstrgrow.c b/libft/src/dstr/ft_dstrgrow.c
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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);
+}