1 files changed, 82 insertions, 0 deletions
diff --git a/src/p_subst_vars.c b/src/p_subst_vars.c
new file mode 100644
index 0000000..47f250b
--- /dev/null
+++ b/src/p_subst_vars.c
@@ -0,0 +1,82 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   p_subst_vars.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 "d_define.h"
+#include "s_struct.h"
+#include "u_parse.h"
+#include "u_utils.h"
+#include "u_vars.h"
+
+static char	*p_double_them_bs(char varval[])
+{
+	char	*ptr;
+
+	ptr = varval;
+	while (*ptr != C_NUL)
+	{
+		if (*ptr == C_BACKS)
+		{
+			ptr = ft_memmove(ptr + 1, ptr, ft_strlen(ptr) + 1);
+			varval[ptr - varval] = C_BACKS;
+		}
+		ptr++;
+	}
+	return (varval);
+}
+
+static void	p_subst_this_var(char **p, int64_t i, char word[], t_msh *msh)
+{
+	char	tmp[ARG_MAX];
+	char	varval[ARG_MAX];
+	char	*ptr;
+	size_t	varlen;
+
+	ptr = word;
+	varlen = i + 1;
+	while (ptr[varlen] != C_NUL &&
+		ft_ischarset("$=\\/@%^*+{}[]<>(),.-", ptr[varlen]) == FALSE
+		&& ft_iswhitespace(ptr[varlen]) == FALSE)
+		varlen += 1;
+	ft_strlcpy(tmp, ptr + i, varlen + 1 - i);
+	u_get_var_value(varval, tmp, ARG_MAX, msh);
+	p_double_them_bs(varval);
+	(void)ft_memmove(ptr + (i + ft_strlen(varval)),
+		ptr + varlen,
+		(ft_strlen(ptr + varlen) + 1) * sizeof(char));
+	(void)ft_memmove(word + i, varval, ft_strlen(varval) * sizeof(char));
+	*(p) = word + (i + ft_strlen(varval) - 1);
+}
+
+void		p_subst_vars(char word[], t_msh *msh)
+{
+	char			*ptr;
+	t_quote_mode	mode;
+
+	mode = Q_NONE;
+	ptr = word;
+	while (*ptr != C_NUL)
+	{
+		if (*ptr == C_DQUOTE)
+			mode = u_meet_dquote(word, ptr, mode);
+		else if (*ptr == C_SQUOTE)
+			mode = u_meet_squote(word, ptr, mode);
+		if ((mode == Q_NONE || mode == Q_DOUBLE) && *ptr == C_DOLLAR &&
+			u_is_not_escaped(word, ptr) == TRUE)
+		{
+			p_subst_this_var(&ptr, (ptr - word), word, msh);
+		}
+		ptr++;
+	}
+}