Merge branch 'master' into fix-pwd

1 files changed, 102 insertions, 0 deletions

diff --git a/src/u_vars_next.c b/src/u_vars_next.c
new file mode 100644
index 0000000..820bbe1
--- /dev/null
+++ b/src/u_vars_next.c
@@ -0,0 +1,102 @@
+/* ************************************************************************** */
+/*                                                                            */
+/*                                                        :::      ::::::::   */
+/*   u_vars_next.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 <inttypes.h>
+#include <stdlib.h>
+
+#include "d_enum.h"
+#include "s_lvars.h"
+#include "s_struct.h"
+
+static int64_t
+	u_get_env_var_line(const char varname[],
+				t_msh *msh)
+{
+	char	**env_ptr;
+	int64_t	i;
+
+	env_ptr = msh->envp;
+	i = 0;
+	while (*env_ptr &&
+		ft_strncmp(varname, *env_ptr, ft_strclen(*env_ptr, '=')) != 0)
+	{
+		env_ptr++;
+		i++;
+	}
+	if (*env_ptr)
+		return (i);
+	else
+		return (-1);
+}
+
+static t_bool
+	u_get_custom_var_existance(const char varname[],
+							t_msh *msh)
+{
+	t_lvars	*ptr;
+
+	ptr = msh->vars;
+	while (ptr &&
+		ft_strncmp(varname, ptr->name, ft_strlen(varname) + 1) != 0)
+	{
+		ptr = ptr->next;
+	}
+	if (ptr != NULL)
+	{
+		return (TRUE);
+	}
+	else
+	{
+		return (FALSE);
+	}
+}
+
+/*
+** void
+** u_subst_var_value(const char varname[], const char newval[], t_msh *msh);
+**
+** DESCRIPTION
+** The subst_var_value() changes the value of msh->envp
+** variable varname[] with newval[]. If varname[] wasn't found
+** in msh->envp, varname[] is searched in msh->vars.
+*/
+
+void
+	u_subst_var_value(const char varname[],
+					const char newval[],
+					t_msh *msh)
+{
+	char	new_line_fmt[2048];
+	int64_t	env_line;
+
+	if ((env_line = u_get_env_var_line(varname + 1, msh)) > -1)
+	{
+		ft_memdel((void*)&msh->envp[env_line]);
+		ft_sprintf(new_line_fmt, "%s=%s", varname + 1, newval);
+		if (!(msh->envp[env_line] =
+			  (char*)malloc((ft_strlen(new_line_fmt) + 1) * sizeof(char))))
+		{
+			/* TODO: Handle this fail */
+		}
+		(void)ft_strlcpy(msh->envp[env_line],
+			new_line_fmt, ft_strlen(new_line_fmt) + 1);
+	}
+	else if ((env_line = u_get_custom_var_existance(varname + 1, msh)) == TRUE)
+	{
+		lvars_rebind(&msh->vars, varname + 1, newval);
+	}
+	else
+	{
+		lvars_add_front(&msh->vars, lvars_new(varname + 1, newval));
+	}
+}