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refactoring expander

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This commit is contained in:
Quinten Mennen 2025-02-18 21:04:26 +01:00
parent 1cccbad890
commit ce028b7b6f
3 changed files with 63 additions and 63 deletions
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4
inc/expander.h
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@ -6,7 +6,7 @@
/* By: qmennen <qmennen@student.codam.nl> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/02/18 19:00:51 by qmennen #+# #+# */
/* Updated: 2025/02/18 19:05:14 by qmennen ### ########.fr */
/* Updated: 2025/02/18 20:40:04 by qmennen ### ########.fr */
/* */
/* ************************************************************************** */
@ -15,6 +15,8 @@
#include "minishell.h"
size_t expander_count_vars(const char *s);
char *expander_parse_string(char *s, t_minishell *minishell);
#endif

93
src/expander/expander.c
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@ -6,89 +6,58 @@
/* By: qmennen <qmennen@student.codam.nl> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/02/18 19:00:35 by qmennen #+# #+# */
/* Updated: 2025/02/18 20:31:36 by qmennen ### ########.fr */
/* Updated: 2025/02/18 21:04:00 by qmennen ### ########.fr */
/* */
/* ************************************************************************** */
#include "environment.h"
#include "libft.h"
#include "minishell.h"
#include <stdio.h>
#include "typedef.h"
static size_t len_prefix(const char *s)
static size_t len_var_name(const char *s, int idx)
{
size_t i;
i = 0;
while (s[i] != '$' && s[i])
while (s[idx + i] && ft_isalpha(s[idx + i]))
i++;
return (i);
}
static size_t len_var_name(const char *s)
t_environment *get_var(const char *s, int idx, t_minishell *minishell)
{
size_t start;
size_t i;
int i;
t_environment *env;
char *name;
start = len_prefix(s);
if (start == ft_strlen(s))
return (0);
start++;
i = 0;
while (s[start + i] && !ft_isspace(s[start + i]))
while (s[idx + i] && ft_isalpha(s[idx + i]))
i++;
return (i);
}
static char *get_env_value(char *s)
{
int start;
start = 0;
while (s[start] != '$' && s[start])
start++;
if (s[start] != '$' || !s[start + 1])
return (NULL);
start++;
return ft_substr(s, start, len_var_name(s));
}
static char *expand_string(char *s, t_environment *env)
{
char *s1;
char *s2;
char *s3;
char *final_str;
final_str = ft_calloc(1, ft_strlen(env->value) + ft_strlen(s) - len_var_name(s));
if (!final_str)
{
perror("malloc");
exit(EXIT_FAILURE);
}
s1 = ft_substr(s, 0, len_prefix(s));
s2 = ft_strdup(env->value);
s3 = ft_substr(s, len_prefix(s) + 1 + len_var_name(s),len_prefix(s) + len_var_name(s) - ft_strlen(s));
if (!s1 || !s2 || !s3)
perror("expand");
return (ft_strjoin(ft_strjoin(s1, s2), s3));
name = ft_substr(s, idx, i);
if (!name)
perror("name");
env = environment_get(minishell->environment, name);
free(name);
return (env);
}
char *expander_parse_string(char *s, t_minishell *minishell)
{
size_t l1;
char *result;
char *name;
int i;
t_environment *env;
t_list *var_list;
l1 = len_prefix(s);
if (l1 == ft_strlen(s))
return (ft_strdup(s));
name = get_env_value(s);
if (!name)
return (ft_strdup(""));
env = environment_get(minishell->environment, name);
if (!env)
return (ft_strdup(""));
result = expand_string(s, env);
free(name);
return (result);
i = 0;
while (s[i])
{
if (s[i] == '$')
{
env = get_var(s, i, minishell);
if (env)
ft_lstadd_back(&var_list, ft_lstnew(env->value));
}
i++;
}
return ft_strdup("");
}

29
src/expander/expander_count_vars.c Normal file
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@ -0,0 +1,29 @@
/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* expander_count_vars.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: qmennen <qmennen@student.codam.nl> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2025/02/18 20:38:17 by qmennen #+# #+# */
/* Updated: 2025/02/18 20:39:53 by qmennen ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
size_t expander_count_vars(const char *s)
{
size_t vars;
size_t i;
i = 0;
vars = 0;
while (s[i])
{
if (s[i] == '$' && ft_isalpha(s[i + 1]))
vars++;
i++;
}
return (vars);
}