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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* b_unset.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: rbousset <marvin@42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2020/02/14 17:19:27 by rbousset #+# #+# */
/* Updated: 2020/02/14 17:19:29 by rbousset ### ########lyon.fr */
/* */
/* ************************************************************************** */
#include <libft.h>
#include <stdint.h>
#include <stdlib.h>
#include "f_fail.h"
#include "s_lvars.h"
#include "s_struct.h"
#include "u_utils.h"
static t_bool
check_valid_identifier(const char arg[])
{
char *ptr;
t_bool r;
ptr = (char*)arg;
r = TRUE;
if (ft_isalpha(ptr[0]) == FALSE)
{
r = FALSE;
}
if (ptr[0] == '_')
{
r = TRUE;
}
while (*ptr != '\0')
{
if (*ptr == '=')
{
r = FALSE;
}
ptr++;
}
return (r);
}
static void
b_realloc_env(size_t skip,
t_msh *msh)
{
char **nenvp;
int8_t skipped;
size_t i;
i = 0;
while (msh->envp[i] != NULL)
i++;
if (!(nenvp = (char**)malloc(i * sizeof(char*))))
f_alloc_and_destroy_msh(msh);
i = 0;
skipped = 0;
while (msh->envp[i] != NULL)
{
if (i == skip)
{
i += 1;
if (msh->envp[i] == NULL)
break ;
skipped = 1;
}
if (!(nenvp[i - skipped] = ft_strdup(msh->envp[i])))
f_alloc_and_destroy_msh(msh);
i++;
}
nenvp[i - 1] = 0;
ft_delwords(msh->envp);
msh->envp = nenvp;
}
static t_bool
b_removed_from_env(const char arg[],
t_msh *msh)
{
char **env_dup;
size_t i;
env_dup = u_get_env_var_names(msh);
i = 0;
while (env_dup[i] != NULL)
{
if (ft_strncmp(arg, env_dup[i], ft_strlen(env_dup[i]) + 1) == 0)
{
b_realloc_env(i, msh);
ft_delwords(env_dup);
return (TRUE);
}
i++;
}
ft_delwords(env_dup);
return (FALSE);
}
static void b_remove_it(const char arg[], t_msh *msh)
{
if (b_removed_from_env(arg, msh) == FALSE)
{
lvars_delone(&msh->vars, arg);
}
}
uint8_t
b_unset(char *args[],
t_msh *msh)
{
char **ptr;
t_bool next;
int8_t r;
if (args[0] == NULL)
return (0);
r = 0;
ptr = args;
while (*ptr != NULL)
{
next = FALSE;
if (check_valid_identifier(*ptr) == FALSE)
{
f_fail_identifier("unset", *ptr);
next = TRUE;
r = 1;
}
if (next == FALSE)
{
b_remove_it(*ptr, msh);
}
ptr++;
}
return (r);
}
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