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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* preprocess.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: charles <charles.cabergs@gmail.com> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/04/03 08:58:49 by charles #+# #+# */
/* Updated: 2020/06/12 11:57:17 by charles ### ########.fr */
/* */
/* ************************************************************************** */
#include "minishell.h"
#include "ms_glob.h"
#include "lexer.h"
static bool st_escapable(char c, enum e_token_tag tag)
{
if (tag & LTAG_STR)
return (true);
if ((tag & LTAG_STR_DOUBLE) && (c == '\\' || c == '"' || c == '$'))
return (true);
return (false);
}
static char *st_iterpolate_env(char *str, enum e_token_tag tag, t_env env)
{
size_t i;
t_ftdstr *dstr;
char *match;
if ((dstr = ft_dstrwrap(str)) == NULL)
return (NULL);
i = -1;
while (++i < dstr->length)
if (dstr->str[i] == '\\' && st_escapable(dstr->str[i + 1], tag))
ft_dstrerase(dstr, i, 1);
else if (dstr->str[i] == '$')
{
if ((match = env_search_first_match(env, dstr->str + i + 1)) == NULL)
{
ft_dstrerase(dstr, i, utils_var_end(dstr->str + i + 1));
i--;
}
else
{
if (ft_dstrsubstitute(dstr, match, i, utils_var_end(dstr->str + i + 1)) == NULL)
{
ft_dstrdestroy(dstr);
return (NULL);
}
i += ft_strlen(match) - 1;
}
}
return (ft_dstrunwrap(dstr));
}
static char *st_iterpolate_globs(char *str)
{
char **strs;
int i;
if ((strs = ft_splitf(str, ' ')) == NULL)
return (NULL);
i = 0;
while (strs[i] != NULL)
{
if (ft_strchr(strs[i], '*') != NULL
&& (strs[i] = ms_globf(strs[i])) == NULL)
{
ft_split_destroy(strs);
return (NULL);
}
i++;
}
return (ft_strsjoinf(strs, " "));
}
static int st_splat_arg(t_ftvec *argv, int i)
{
t_token *splated;
char **strs;
int j;
if ((splated = ft_vectake(argv, i)) == NULL
|| (strs = ft_split(splated->content, ' ')) == NULL)
{
token_destroy(splated);
return (-1);
}
j = 0;
while (strs[j] != NULL)
{
if (ft_vecinsert_safe(argv, i + j, token_new(LTAG_STR, strs[j])) == NULL)
{
token_destroy(splated);
ft_split_destroy(strs);
return (-1);
}
j++;
}
token_destroy(splated);
ft_split_destroy(strs);
return (i + j - 1);
}
static void st_iter_func_unwrap_token(void **addr)
{
char *content;
content = (*(t_token**)addr)->content;
free(*(t_token**)addr);
*(char**)addr = content;
}
char **preprocess(t_ftvec *argv, t_env env)
{
size_t i;
t_token *token;
i = -1;
while (++i < argv->size)
{
token = argv->data[i];
if (token->tag & LTAG_STR_SINGLE)
continue ;
token->content = st_iterpolate_env(token->content, token->tag, env);
if (token->tag & LTAG_STR)
{
if (ft_strchr(token->content, '*') != NULL)
token->content = st_iterpolate_globs(token->content);
if ((i = st_splat_arg(argv, i)) == (size_t)-1)
return (NULL);
}
}
t_token *next;
i = -1;
while (++i < argv->size - 1)
{
token = argv->data[i];
while (token->tag & LTAG_STICK && i + 1 < argv->size)
{
next = argv->data[i + 1];
token->content = ft_strjoinf_fst(token->content, next->content);
if (token->content == NULL)
return (NULL);
token->tag &= next->tag;
ft_vecremove(argv, i + 1, (void (*)(void*))token_destroy);
}
}
ft_veciter_addr(argv, st_iter_func_unwrap_token);
ft_vecpush(argv, NULL);
return ((char**)ft_vecunwrap(argv));
}
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