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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* preprocess.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/04/03 08:58:49 by charles #+# #+# */
/* Updated: 2020/10/09 15:31:33 by cacharle ### ########.fr */
/* */
/* ************************************************************************** */
#include "eval.h"
#include "lexer.h"
#include "minishell.h"
t_tok_lst *st_stick_tokens(t_tok_lst *tokens)
{
t_tok_lst *curr;
t_tok_lst *tmp;
curr = tokens;
while (curr != NULL)
{
if (curr->tag & TAG_STICK && curr->next != NULL)
{
curr->content = ft_strjoinf_fst(curr->content, curr->next->content);
tmp = curr->next->next;
curr->tag = curr->next->tag;
ft_lstdelone((t_ftlst *)curr->next, free);
curr->next = tmp;
continue;
}
curr = curr->next;
}
return (tokens);
}
char **st_tokens_to_argv(t_tok_lst **tokens)
{
char **ret;
size_t i;
t_tok_lst *curr;
curr = *tokens;
ret = ft_calloc(ft_lstsize((t_ftlst *)curr) + 1, sizeof(char *));
if (ret == NULL)
return (NULL);
i = 0;
while (curr != NULL)
{
ret[i++] = curr->content;
curr = curr->next;
}
tok_lst_destroy(tokens, NULL);
return (ret);
}
bool escape(char *str, enum e_tok tag)
{
if (str[0] == '\\' &&
(tag & TAG_STR || ((tag & TAG_STR_DOUBLE)
&& ft_strchr("\\\"$", str[1]))))
{
ft_memmove(str, str + 1, ft_strlen(str + 1) + 1);
return (true);
}
return (false);
}
char **preprocess(t_tok_lst **tokens, t_env env)
{
t_tok_lst *curr;
enum e_tok prev_tag;
char *str;
size_t i;
prev_tag = 0;
curr = *tokens;
while (curr != NULL)
{
if (curr->tag & (TAG_STR | TAG_STR_DOUBLE))
{
i = -1;
while ((str = curr->content) != NULL && str[++i] != '\0')
{
if (escape(str + i, curr->tag))
continue;
if (str[i] == '$')
i = interpolate(str, i, &curr, prev_tag, env) - 1;
}
}
prev_tag = curr->tag;
curr = curr->next;
}
st_stick_tokens(*tokens);
return (st_tokens_to_argv(tokens));
}
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