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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* lexer.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: nahaddac <nahaddac@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/07/16 08:18:25 by nahaddac #+# #+# */
/* Updated: 2020/09/13 17:45:30 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "lexer.h"
// len until meaningful character for non quoted str
int len_until_sep(char *input)
{
int i;
i = -1;
while (input[++i])
{
if (input[i] == '\\')
{
i += 2;
if (ft_isblank(input[i]))
return (i + 1 + lexer_space(&input[i + 1]));
else if (input[i] != '\'' || input[i] != '"')
i += len_until_sep(&input[i]);
return (i);
}
if (lexer_sep(input[i]))
return (i);
if (input[i] == '\'' || input[i] == '"')
return (i);
if (ft_isblank(input[i]))
return (i + 1 + lexer_space(&input[i + 1]));
}
return (i);
}
// token content length
int tok_len(char *input)
{
int i;
i = 0;
if (input[i] == '\\' && lexer_sep(input[i + 1]))
{
i += 2;
return (i + lexer_space(&input[i]));
}
if (input[i] == '(' || input[i] == ')')
return (i + 1);
if (lexer_sep(input[i])) // fucked on & alone
{
if (input[i] == input[i + 1])
i++;
return (i + 1 + lexer_space(&input[i + 1]));
}
if (input[i] == '\'' || input[i] == '"')
return (quote_len(input, i));
if (ft_isblank(input[i]))
return (i + 1 + lexer_space(&input[i + 1]));
return (len_until_sep(&input[i]));
}
/*
** \brief interate over input
** get the number of character for the current token
** create a token from a substring in input
** assign a tag to the token
*/
t_tok_lst *create_token_list(char *input, t_tok_lst **lst)
{
t_tok_lst *tok;
size_t i;
size_t j;
size_t len;
len = ft_strlen(input);
i = 0;
while (i < len)
{
j = tok_len(&input[i]);
tok = tok_lst_new_until(0, input + i, j);
tok->tag = tok_assign_tag(tok->content);
if (tok->tag == 0)
tok->tag = tok_assign_str(tok);
if (!ft_isblank(tok->content[0])) // ?
tok_lst_push_back(lst, tok);
i += j;
}
return (*lst);
}
/*
** \brief Create a token list from a string
** \param input Input string
** \return The created tokens or NULL on error
*/
t_tok_lst *lexer(char *input)
{
t_tok_lst *lst;
if (!input)
return (NULL);
lst = NULL;
lst = create_token_list(input, &lst);
lst = lexer_trim_out(lst);
return (lst);
}
/* int check_input_out(char *input) */
/* { */
/* int i; */
/* int j; */
/* */
/* i = 0; */
/* while(input[i] != '\0') */
/* { */
/* j = 0; */
/* j += len_until_sep(&input[i]); */
/* if (j != 0) */
/* return(j); */
/* i += j; */
/* j = check_input(&input[i]); */
/* return(j); */
/* } */
/* return(0); */
/* } */
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