90 lines
2.5 KiB
C
90 lines
2.5 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* export_utils3.c :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: tordner <[email protected]> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2025/06/01 21:39:14 by tordner #+# #+# */
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/* Updated: 2025/06/01 21:40:08 by tordner ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "../../includes/minishell.h"
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char *get_env_value_for_expansion(char **env, char *var_name)
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{
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int i;
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int var_len;
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char *equal_pos;
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if (!env || !var_name)
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return (NULL);
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var_len = ft_strlen(var_name);
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i = 0;
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while (env[i])
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{
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equal_pos = ft_strchr(env[i], '=');
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if (equal_pos && (equal_pos - env[i]) == var_len
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&& ft_strncmp(env[i], var_name, var_len) == 0)
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return (equal_pos + 1);
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i++;
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}
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return (NULL);
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}
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char *extract_var_name(char *result, char *var_start, char *var_end)
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{
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return (ft_substr(result, var_start - result + 1, var_end - var_start - 1));
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}
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char *build_expanded_string(char *result, char *var_start, char *var_end,
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char *var_value)
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{
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char *before_var;
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char *after_var;
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char *temp;
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char *final_result;
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before_var = ft_substr(result, 0, var_start - result);
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after_var = ft_strdup(var_end);
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if (!before_var || !after_var)
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{
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free(before_var);
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free(after_var);
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return (NULL);
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}
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temp = ft_strjoin(before_var, var_value);
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free(before_var);
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if (!temp)
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{
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free(after_var);
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return (NULL);
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}
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final_result = ft_strjoin(temp, after_var);
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free(temp);
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free(after_var);
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return (final_result);
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}
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char *find_next_var(char *result, char **var_start, char **var_end)
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{
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char *temp;
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*var_start = ft_strchr(result, '$');
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if (!*var_start)
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return (result);
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*var_end = *var_start + 1;
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while (**var_end && (ft_isalnum(**var_end) || **var_end == '_'))
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(*var_end)++;
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if (*var_end == *var_start + 1)
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{
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temp = ft_strchr(*var_start + 1, '$');
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if (!temp)
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return (result);
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*var_start = temp;
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return (find_next_var(result, var_start, var_end));
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}
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return (result);
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}
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