Merge branch 'eval'

1 files changed, 69 insertions, 0 deletions

diff --git a/src/preprocess.c b/src/preprocess.c
new file mode 100644
index 0000000..c30bb70
--- /dev/null
+++ b/src/preprocess.c
@@ -0,0 +1,69 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   preprocess.c                                       :+:      :+:    :+:   */
+/*                                                    +:+ +:+         +:+     */
+/*   By: charles <charles.cabergs@gmail.com>        +#+  +:+       +#+        */
+/*                                                +#+#+#+#+#+   +#+           */
+/*   Created: 2020/04/03 08:58:49 by charles           #+#    #+#             */
+/*   Updated: 2020/04/05 15:04:06 by charles          ###   ########.fr       */
+/*                                                                            */
+/* ************************************************************************** */
+
+#include "minishell.h"
+#include "ms_glob.h"
+
+static char	*iterpolate(char *str, t_env env)
+{
+	size_t		i;
+	t_ftdstr	*dstr;
+	char		*match;
+
+	if ((dstr = ft_dstrnew(str)) == NULL)
+		return (NULL);
+	free(str);
+	i = 0;
+	while (i < dstr->length)
+	{
+		if (dstr->str[i] == '$')
+		{
+			if ((match = env_search_first_match(env, dstr->str + i + 1)) == NULL)
+				ft_dstrerase(dstr, i, utils_var_end(dstr->str + i + 1));
+			else
+			{
+				if (ft_dstrsubstitute(dstr, match, i, utils_var_end(dstr->str + i + 1)) == NULL)
+					return (NULL);
+			}
+		}
+		i++;
+	}
+	return (ft_dstrunwrap(dstr));
+}
+
+static char	*preprocess_arg(char *arg, t_env env)
+{
+	if (*arg == '\'')
+		return (ft_strsubf(arg, 1, ft_strlen(arg) - 1));
+	if (*arg == '"')
+	{
+		if (ft_strchr(arg, '$') != NULL)
+			arg = iterpolate(arg, env);
+		return (ft_strsubf(arg, 1, ft_strlen(arg) - 1));
+	}
+	if (ft_strchr(arg, '$') != NULL)
+		return (iterpolate(arg, env));
+	if (ft_strchr(arg, '*') != NULL)
+		return (ms_glob(arg));
+	return (arg);
+}
+
+char		**preprocess_argv(char **argv, t_env env)
+{
+	int	i;
+
+	i = -1;
+	while (argv[++i] != NULL)
+		if ((argv[i] = preprocess_arg(argv[i], env)) == NULL)
+			return (NULL);
+	return (argv);
+}