42/42_INT_07_minishell
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expansions refactoring done

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LuckyLaszlo
2021-12-16 03:12:32 +01:00
parent e5f033694b
commit 5a0a237aaa
1 changed files with 76 additions and 52 deletions
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128
srcs/parsing/expansions/expand_token.c
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@@ -6,91 +6,115 @@
/* By: lperrey <lperrey@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2021/11/07 02:01:33 by lperrey #+# #+# */
/* Updated: 2021/12/15 13:33:18 by lperrey ### ########.fr */
/* Updated: 2021/12/16 03:03:27 by lperrey ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
static char *env_var_expansion(char *content, int *i);
static t_list *content_copy(char *content, int *i, int *quotes_state);
static t_list *content_expand(char *content, int *i);
static char *env_var_expansion(char *content, int *i);
t_list *expand_token(char *content)
{
int in_quotes;
int quotes_state;
int i;
int i_exp;
t_list head;
t_list *expand;
in_quotes = 0;
i = 0;
head.next = NULL;
expand = &head;
quotes_state = 0;
i = 0;
while (content[i])
{
if (content[i] == '$')
{
expand->next = ft_lstnew(NULL);
expand = expand->next;
if (!expand)
{//todo wrap
perror("expand_token() error");
return (ft_lstclear(&head.next, free));
}
expand->content = env_var_expansion(content, &i);
if (!expand->content)
{//todo wrap
perror("expand_token() error");
return (ft_lstclear(&head.next, free));
}
}
expand->next = content_expand(content, &i);
else
{
expand->next = ft_lstnew_generic(sizeof(t_list), ft_strlen(&content[i]) + 1);
expand = expand->next;
i_exp = 0;
if (!expand)
{//todo wrap
perror("expand_token() error");
return (ft_lstclear(&head.next, free));
}
while (content[i] && (content[i] != '$' || in_quotes == IN_QUOTES))
{
// quoting
if (content[i] == '\'' && in_quotes != IN_DQUOTES)
{
if (in_quotes == IN_QUOTES)
in_quotes = 0;
else
in_quotes = IN_QUOTES;
}
((char *)expand->content)[i_exp++] = content[i++];
}
expand->next = content_copy(content, &i, &quotes_state);
expand = expand->next;
if (!expand)
{//todo wrap
perror("expand_token() error");
return (ft_lstclear(&head.next, free));
}
}
return (head.next);
}
static t_list *content_copy(char *content, int *i, int *quotes_state)
{
int i_exp;
t_list *expand;
expand = ft_lstnew_generic(sizeof(t_list), ft_strlen(&content[*i]) + 1);
if (!expand)
return (NULL);
i_exp = 0;
while (content[*i] && (content[*i] != '$' || *quotes_state == IN_QUOTES))
{
if (content[*i] == '\'' && *quotes_state != IN_DQUOTES)
{
if (*quotes_state == IN_QUOTES)
*quotes_state = 0;
else
*quotes_state = IN_QUOTES;
}
((char *)expand->content)[i_exp++] = content[(*i)++];
}
return (expand);
}
static t_list *content_expand(char *content, int *i)
{
t_list *expand;
expand = ft_lstnew(NULL);
if (!expand)
return (NULL);
expand->content = env_var_expansion(content, i);
if (!expand->content)
{
free(expand);
return (NULL);
}
return (expand);
}
static char *retrieve_var(char *content, int *i);
static char *env_var_expansion(char *content, int *i)
{
char *expansion;
char *tmp;
int i_exp;
(*i)++; // skip '$'
if (content[*i] == '?')
{
(*i)++;
expansion = ft_itoa(get_last_exit_status());
return (expansion);
}
expansion = ft_calloc(ft_strlen(&content[*i - 1]) + 1, 1); // - 1 pour le premier skip
else if (content[*i] == '_' || ft_isalpha(content[*i]))
expansion = retrieve_var(content, i);
else
{
expansion = ft_calloc(1 + 1, 1);
if (!expansion)
return (NULL);
expansion[0] = '$';
}
return (expansion);
}
static char *retrieve_var(char *content, int *i)
{
char *expansion;
char *tmp;
int i_exp;
expansion = ft_calloc(ft_strlen(&content[*i - 1]) + 1, 1); // *i - 1 for '$' skip
if (!expansion)
return (NULL);
expansion[0] = '$';
if (content[*i] != '_' && !ft_isalpha(content[*i]))
return (expansion);
i_exp = 0;
while (content[*i] == '_' || ft_isalnum(content[*i]))
expansion[i_exp++] = content[(*i)++];
@@ -98,8 +122,8 @@ static char *env_var_expansion(char *content, int *i)
ft_free_null(&expansion);
if (tmp)
expansion = ft_strdup(tmp);
else // fix zob, a mieux faire
expansion = ft_calloc(1, 1);; //
else
expansion = ft_calloc(1, 1);
return (expansion);
}