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+/* $Id$ 
+ *
+ * PyXMLSec - Python bindings for XML Security library (XMLSec)
+ *
+ * Copyright (C) 2003-2004 Easter-eggs, Valery Febvre
+ * http://pyxmlsec.labs.libre-entreprise.org
+ * 
+ * Author: Valery Febvre <vfebvre@easter-eggs.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <stdarg.h>
+
+#include "utils.h"
+
+int CheckArgs(PyObject *args, char *format) {
+  PyObject *obj;
+  int i, nb_args;
+
+  nb_args = PyTuple_GET_SIZE(args);
+
+  /* lowercase means that arg is optional */
+  /* O : Instance */
+  /* C : Callable */
+  /* S : String   */
+  /* I : Integer  */
+  /* F : File     */
+  for (i = 0; i < nb_args; i++) {
+    obj = PyTuple_GET_ITEM(args, i);
+    /* O or o : instance */
+    if (format[i] == 'O' || format[i] == 'o') {
+      if (!PyInstance_Check(obj)) {
+	if (format[i] == 'o' && obj == Py_None) continue;
+	PyErr_Format(xmlsec_error,
+		     "%s() argument %d must be an instance.",
+		     format + nb_args, i+1);
+	return 0;
+      }
+    }
+    /* C or c : callable */
+    else if (format[i] == 'C' || format[i] == 'c') {
+      if (!PyCallable_Check(obj)) {
+	if (format[i] == 'c' && obj == Py_None) continue;
+	PyErr_Format(xmlsec_error,
+		     "%s() argument %d must be callable.",
+		     format + nb_args, i+1);
+	return 0;
+      }
+    }
+    /* S or s : string */
+    else if (format[i] == 'S' || format[i] == 's') {
+      if (!PyString_Check(obj)) {
+	if (format[i] == 's' && obj == Py_None) continue;
+	PyErr_Format(xmlsec_error,
+		     "%s() argument %d must be a string.",
+		     format + nb_args, i+1);
+	return 0;
+      }
+    }
+    /* I or i : integer */
+    else if (format[i] == 'I' || format[i] == 'i') {
+      if (!PyInt_Check(obj)) {
+	if (format[i] == 'i' && obj == Py_None) continue;
+	PyErr_Format(xmlsec_error,
+		     "%s() argument %d must be an integer.",
+		     format + nb_args, i+1);
+	return 0;
+      }
+    }
+    /* F or f : file */
+    else if (format[i] == 'F' || format[i] == 'f') {
+      if (!PyFile_Check(obj)) {
+	if (format[i] == 'f' && obj == Py_None) continue;
+	PyErr_Format(xmlsec_error,
+		     "%s() argument %d must be a file.",
+		     format + nb_args, i+1);
+	return 0;
+      }
+    }
+    /* type is variable */
+    else if (format[i] == '?') {
+      continue;
+    }
+  }
+
+  return 1;
+}