In progress

1 files changed, 132 insertions, 0 deletions

diff --git a/src/p_subst_alias.c b/src/p_subst_alias.c
new file mode 100644
index 0000000..9e25087
--- /dev/null
+++ b/src/p_subst_alias.c
@@ -0,0 +1,132 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   p_subst_alias.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 <stddef.h>
+
+#include "s_struct.h"
+#include "u_alias.h"
+#include "u_parse.h"
+#include "u_utils.h"
+#include "u_vars.h"
+
+static char		*p_skip_whitespace(char *ptr)
+{
+	while (*ptr != C_NUL && ft_iswhitespace(*ptr))
+	{
+		ptr++;
+	}
+	return (ptr);
+}
+
+static t_bool	p_meet_whitespace(char *head, char *ptr, t_quote_mode mode)
+{
+	if (mode == Q_NONE && u_is_not_escaped(head, ptr) == TRUE)
+	{
+		return (TRUE);
+	}
+	return (FALSE);
+}
+
+static char		*p_set_ptr(char *ptr, char word[], t_bool *good, size_t locat[])
+{
+	t_quote_mode	mode;
+
+	mode = Q_NONE;
+	while (*ptr != C_NUL)
+	{
+		if (*ptr == C_DQUOTE)
+			mode = u_meet_dquote(word, ptr, mode);
+		if (*ptr == C_SQUOTE)
+			mode = u_meet_squote(word, ptr, mode);
+		if (mode == Q_NONE && *ptr == C_EQUALS)
+			*good = FALSE;
+		if (ft_iswhitespace(*ptr) == TRUE
+			&& p_meet_whitespace((char*)word, ptr, mode) == TRUE)
+		{
+			locat[1] = (ptr - word);
+			if (*good == TRUE)
+				break ;
+			else
+			{
+				ptr = p_skip_whitespace(ptr);
+				locat[0] = (ptr - word);
+				ptr -= 1;
+				*good = TRUE;
+			}
+		}
+		ptr++;
+	}
+	return (ptr);
+}
+
+size_t			p_subst_alias(char word[], t_bool reset, t_msh *msh)
+{
+	static size_t	used[4096];
+	static size_t	i = 0;
+	char			value[ARG_MAX];
+	char			tmp[255];
+	size_t			locat[2];
+	size_t			j;
+	size_t			usedcmp;
+	char			*ptr;
+	t_bool			good;
+
+	if (reset == TRUE)
+	{
+		i = 0;
+		while (i < 4096)
+		{
+			used[i] = 0;
+			i++;
+		}
+		i = 0;
+	}
+	ptr = word;
+	ptr = p_skip_whitespace(ptr);
+	good = TRUE;
+	locat[0] = (ptr - word);
+	locat[1] = (ptr - word);
+	ptr = p_set_ptr(ptr, word, &good, locat);
+	if (*ptr == C_NUL && good == TRUE)
+		locat[1] = (ptr - word);
+	if (good == TRUE)
+	{
+		ft_strlcpy(tmp,
+			word + locat[0],
+			((locat[1] - locat[0] < 253) ? (locat[1] - locat[0]) : (254)) + 1);
+		if ((usedcmp = u_get_alias_value(value, tmp, ARG_MAX, msh)) != 0)
+		{
+			j = 0;
+			good = TRUE;
+			while (j < i)
+			{
+				if (used[j] == usedcmp)
+					good = FALSE;
+				j++;
+			}
+			if (good == TRUE)
+			{
+				(void)ft_memmove(word + (locat[0] + ft_strlen(value)),
+					word + locat[1],
+					ft_strlen(word + locat[1]) + 1 * sizeof(char));
+				(void)ft_memmove(word + locat[0],
+					value,
+					ft_strlen(value) * sizeof(char));
+				used[i] = usedcmp;
+				i++;
+				return (usedcmp);
+			}
+		}
+	}
+	return (0);
+}