Refactor code into utils, mfapi and mfshell

- utils is the low level library used by the others
 - mfapi uses utils and implements the api and some wrappers
 - mfshell uses mfapi and utils to provide a shell

mfshell/commands/help.c

@@ -0,0 +1,56 @@
+/*
+ * Copyright (C) 2013 Bryan Christ <bryan.christ@mediafire.com>
+ *               2014 Johannes Schauer <j.schauer@email.de>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2, as published by
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ *
+ */
+
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "../mfshell.h"
+#include "../commands.h"
+
+int
+mfshell_cmd_help(mfshell_t *mfshell, int argc, char **argv)
+{
+    printf(
+        "  arguments:\n\r"
+        "           <optional>\n\r"
+        "           [required]\n\r");
+
+    printf("\n\r");
+
+    int column1_width = 0;
+    int column2_width = 0;
+
+    _cmd_t* curr_cmd;
+    for (curr_cmd = mfshell->commands; curr_cmd->name != NULL; curr_cmd++) {
+        if (strlen(curr_cmd->name) > column1_width)
+            column1_width = strlen(curr_cmd->name);
+        if (strlen(curr_cmd->argstring) > column2_width)
+            column2_width = strlen(curr_cmd->argstring);
+    }
+
+    for (curr_cmd = mfshell->commands; curr_cmd->name != NULL; curr_cmd++) {
+        printf("%*s %*s %s\n", column1_width, curr_cmd->name, column2_width, curr_cmd->argstring, curr_cmd->help);
+    }
+
+    return 0;
+}
+
+