74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* ft_str_replace.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: bgoulard <bgoulard@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/12/09 18:35:51 by bgoulard #+# #+# */
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/* Updated: 2024/07/19 18:16:31 by bgoulard ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "ft_string.h"
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static bool setup(char **res, const char *targ, size_t targ_len, size_t sub_len)
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{
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char *occurence;
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size_t nb_occurence;
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occurence = ft_strnstr(*res, targ, ft_strlen(*res));
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nb_occurence = 0;
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while (occurence)
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{
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occurence = ft_strnstr(occurence + 1, targ, ft_strlen(occurence + 1));
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nb_occurence++;
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}
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*res = ft_malloc(ft_strlen(*res) + (sub_len - targ_len) * nb_occurence + 1);
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if (!*res)
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return (false);
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return (true);
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}
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char *ft_str_replace(const char *str, const char *target, \
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const char *substitute)
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{
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char *res;
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char *ret;
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char *occurence;
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const size_t target_len = ft_strlen(target);
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const size_t substitute_len = ft_strlen(substitute);
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occurence = ft_strnstr(str, target, ft_strlen(str));
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if (!occurence)
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return (ft_strdup(str));
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res = (char *)str;
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if (!setup(&res, target, target_len, substitute_len))
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return (NULL);
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ret = res;
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while (occurence)
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{
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ft_memcpy(res, str, occurence - str);
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res += occurence - str;
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ft_memcpy(res, substitute, substitute_len);
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res += substitute_len;
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str = occurence + target_len;
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occurence = ft_strnstr(str, target, ft_strlen(str));
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}
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return (ft_strlcpy(res, str, ft_strlen(str) + 1), ret);
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}
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char *ft_str_replace_chr(char *str, char to_replace, char replace_by)
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{
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char *ptr;
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ptr = str;
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str = ft_strchr(str, to_replace);
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while (str && *str)
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{
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*str = replace_by;
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str++;
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str = ft_strchr(str, to_replace);
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}
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return (ptr);
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}
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