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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* collect_redirs.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: dkaiser <dkaiser@student.42heilbronn.de +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2024/08/02 13:49:31 by dkaiser #+# #+# */
/* Updated: 2024/09/17 19:48:48 by dkaiser ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
static t_token *collect_redir(t_token **tokens, t_redirection *result,
t_token *cur);
static void collect_and_check_redir(t_token **tokens, t_redirection *result,
t_token **cur);
static void set_redir(t_redirection *redir, int type, char *specifier);
static int is_output_redir(int i);
t_redirection *collect_redirs(t_token **tokens)
{
t_redirection *result;
t_token *cur;
cur = *tokens;
result = malloc(sizeof(t_redirection) * 2);
if (result == NULL)
return (free_tokens(*tokens), NULL);
set_redir(&result[0], 0, NULL);
set_redir(&result[1], 0, NULL);
while (cur != NULL && cur->next != NULL)
{
if (cur->type == REDIR_TOKEN && cur->next->type == STRING_TOKEN)
collect_and_check_redir(tokens, result, &cur);
else if (cur->type == REDIR_TOKEN)
return (free(result), NULL);
else
cur = cur->next;
}
if (cur && cur->type == REDIR_TOKEN)
return (free(result), NULL);
return (result);
}
static void collect_and_check_redir(t_token **tokens, t_redirection *result,
t_token **cur)
{
int is_redir_only;
is_redir_only = 0;
if ((*cur)->previous == NULL && (*cur)->next->next == NULL)
is_redir_only = 1;
*cur = collect_redir(tokens, result, *cur);
if (is_redir_only)
*tokens = NULL;
}
static t_token *collect_redir(t_token **tokens, t_redirection *result,
t_token *cur)
{
set_redir(&result[is_output_redir(cur->content.redir_type)],
cur->content.redir_type, cur->next->content.string);
cur = cur->next;
free_token_and_connect(cur->previous);
if (cur->next != NULL)
{
if (cur->previous == NULL)
*tokens = cur->next;
cur = cur->next;
free_token_and_connect(cur->previous);
}
else
{
free_token(cur);
return (NULL);
}
return (cur);
}
static void set_redir(t_redirection *redir, int type, char *specifier)
{
redir->type = type;
redir->specifier = specifier;
}
static int is_output_redir(int i)
{
if (i & (INPUT_FILE | INPUT_LIMITER))
return (0);
else if (i & (OUTPUT_APPEND | OUTPUT_OVERRIDE))
return (1);
else
{
panic(UNREACHABLE);
return (-1);
}
}
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