Import error codes directly from libmailutils to Python.

* python/libmu_py/Makefile.am (libmu_py_la_SOURCES): Add errno.c
* python/libmu_py/errno.c: New file.
* python/libmu_py/libmu_py.c (_mu_py_module_name): New function.
(_mu_py_attach_module): Use _mu_py_module_name to allocate FQ
module name instead of taking the risk of using fixed size buffer.
Don't call Py_InitModule if methods is NULL.
(mu_py_attach_modules): Call _mu_py_attach_errno.
* python/libmu_py/libmu_py.h (_mu_py_attach_errno): New proto.
* python/mailutils/error.py: Re-export everything from c_api.errno.
Remove hardcoded definitions of error codes.

@@ -19,6 +19,7 @@ INCLUDES = @MU_LIB_COMMON_INCLUDES@ $(PYTHON_INCLUDES)
 lib_LTLIBRARIES=libmu_py.la
 libmu_py_la_SOURCES = \
  error.c \
+ errno.c \
  address.c \
  attribute.c \
  auth.c \

+/* GNU Mailutils -- a suite of utilities for electronic mail
+   Copyright (C) 2009, 2010, 2011 Free Software Foundation, Inc.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 3 of the License, or (at your option) any later version.
+
+   This library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General
+   Public License along with this library.  If not, see 
+   <http://www.gnu.org/licenses/>. */
+
+#include "libmu_py.h"
+#include <mailutils/errno.h>
+
+#define PY_MODULE "errno"
+
+void
+_mu_py_attach_errno (void)
+{
+  int i;
+  PyObject *module = _mu_py_attach_module (PY_MODULE, NULL);
+
+  for (i = MU_ERR_BASE; i < MU_ERR_LAST; i++)
+    {
+      const char *en = mu_errname (i);
+      PyModule_AddIntConstant (module, en, i);
+    }
+}

@@ -42,14 +42,23 @@ status_object (int status, PyObject *py_obj)
 static PyObject *package;
 static PyObject *all;
 
+#define MU_MODULE_ROOT PY_PACKAGE_NAME "." PY_ROOT_NAME "."
+
+static char *
+_mu_py_module_name (const char *nm)
+{
+  char *buf = malloc (sizeof (MU_MODULE_ROOT) + strlen (nm));
+  if (!buf)
+    abort ();
+  return strcat (strcpy (buf, MU_MODULE_ROOT), nm);
+}
+  
 PyObject *
 _mu_py_attach_module (const char *name, PyMethodDef *methods)
 {
-  PyObject *module, *m;
-
-  char ns[64] = PY_PACKAGE_NAME "." PY_ROOT_NAME ".";
-  strcat (ns, name);
-
+  PyObject *module;
+  char *ns = _mu_py_module_name (name);
+  
   if (!(module = PyImport_AddModule (ns)))
     return NULL;
 
@@ -58,11 +67,12 @@ _mu_py_attach_module (const char *name, PyMethodDef *methods)
 
   Py_INCREF (module);
 
-  if (!(m = Py_InitModule (ns, methods)))
+  if (methods && !Py_InitModule (ns, methods))
     return NULL;
 
   PyList_Append (all, PyString_FromString (name));
-  return m;
+  free (ns);
+  return module;
 }
 
 void
@@ -111,6 +121,7 @@ mu_py_attach_modules (void)
   _mu_py_attach_auth ();
   _mu_py_attach_body ();
   _mu_py_attach_envelope ();
+  _mu_py_attach_errno ();
   _mu_py_attach_header ();
   _mu_py_attach_filter ();
   _mu_py_attach_folder ();

@@ -65,6 +65,7 @@ extern void _mu_py_attach_attribute (void);
 extern void _mu_py_attach_auth (void);
 extern void _mu_py_attach_body (void);
 extern void _mu_py_attach_envelope (void);
+extern void _mu_py_attach_errno (void);
 extern void _mu_py_attach_header  (void);
 extern void _mu_py_attach_filter (void);
 extern void _mu_py_attach_folder (void);

@@ -16,6 +16,7 @@
 #  <http://www.gnu.org/licenses/>.
 
 from mailutils.c_api import error
+from mailutils.c_api.errno import *
 
 def strerror (status):
     return error.strerror (status)
@@ -44,81 +45,3 @@ class SieveMachineError (Error): pass
 class StreamError (Error): pass
 class UrlError (Error): pass
 
-MU_ERR_BASE = 0x1000
-
-MU_ERR_FAILURE = (MU_ERR_BASE+0)
-MU_ERR_CANCELED = (MU_ERR_BASE+1)
-MU_ERR_EMPTY_VFN = (MU_ERR_BASE+2)
-MU_ERR_OUT_PTR_NULL = (MU_ERR_BASE+3)
-MU_ERR_MBX_REMOVED = (MU_ERR_BASE+4)
-MU_ERR_NOT_OPEN = (MU_ERR_BASE+5)
-MU_ERR_OPEN = (MU_ERR_BASE+6)
-MU_ERR_INVALID_EMAIL = (MU_ERR_BASE+7)
-MU_ERR_EMPTY_ADDRESS = (MU_ERR_BASE+8)
-MU_ERR_LOCKER_NULL = (MU_ERR_BASE+9)
-MU_ERR_LOCK_CONFLICT = (MU_ERR_BASE+10)
-MU_ERR_LOCK_BAD_LOCK = (MU_ERR_BASE+11)
-MU_ERR_LOCK_BAD_FILE = (MU_ERR_BASE+12)
-MU_ERR_LOCK_NOT_HELD = (MU_ERR_BASE+13)
-MU_ERR_LOCK_EXT_FAIL = (MU_ERR_BASE+14)
-MU_ERR_LOCK_EXT_ERR = (MU_ERR_BASE+15)
-MU_ERR_LOCK_EXT_KILLED = (MU_ERR_BASE+16)
-MU_ERR_NO_SUCH_USER = (MU_ERR_BASE+17)
-MU_ERR_GETHOSTBYNAME = (MU_ERR_BASE+18)
-MU_ERR_MAILER_BAD_FROM = (MU_ERR_BASE+19)
-MU_ERR_MAILER_BAD_TO = (MU_ERR_BASE+20)
-MU_ERR_MAILER_NO_RCPT_TO = (MU_ERR_BASE+21)
-MU_ERR_MAILER_BAD_URL = (MU_ERR_BASE+22)
-MU_ERR_SMTP_RCPT_FAILED = (MU_ERR_BASE+23)
-MU_ERR_TCP_NO_HOST = (MU_ERR_BASE+24)
-MU_ERR_TCP_NO_PORT = (MU_ERR_BASE+25)
-MU_ERR_BAD_2047_INPUT = (MU_ERR_BASE+26)
-MU_ERR_BAD_2047_ENCODING = (MU_ERR_BASE+27)
-MU_ERR_NOUSERNAME = (MU_ERR_BASE+28)
-MU_ERR_NOPASSWORD = (MU_ERR_BASE+29)
-MU_ERR_BADREPLY = (MU_ERR_BASE+30)
-MU_ERR_SEQ = (MU_ERR_BASE+31)
-MU_ERR_REPLY = (MU_ERR_BASE+32)
-MU_ERR_BAD_AUTH_SCHEME = (MU_ERR_BASE+33)
-MU_ERR_AUTH_FAILURE = (MU_ERR_BASE+34)
-MU_ERR_PROCESS_NOEXEC = (MU_ERR_BASE+35)
-MU_ERR_PROCESS_EXITED = (MU_ERR_BASE+36)
-MU_ERR_PROCESS_SIGNALED = (MU_ERR_BASE+37)
-MU_ERR_PROCESS_UNKNOWN_FAILURE = (MU_ERR_BASE+38)
-MU_ERR_CONN_CLOSED = (MU_ERR_BASE+39)
-MU_ERR_PARSE = (MU_ERR_BASE+40)
-MU_ERR_NOENT = (MU_ERR_BASE+41)
-MU_ERR_EXISTS = (MU_ERR_BASE+42)
-MU_ERR_BUFSPACE = (MU_ERR_BASE+43)
-MU_ERR_SQL = (MU_ERR_BASE+44)
-MU_ERR_DB_ALREADY_CONNECTED = (MU_ERR_BASE+45)
-MU_ERR_DB_NOT_CONNECTED = (MU_ERR_BASE+46)
-MU_ERR_RESULT_NOT_RELEASED = (MU_ERR_BASE+47)
-MU_ERR_NO_QUERY = (MU_ERR_BASE+48)
-MU_ERR_BAD_COLUMN = (MU_ERR_BASE+49)
-MU_ERR_NO_RESULT = (MU_ERR_BASE+50)
-MU_ERR_NO_INTERFACE = (MU_ERR_BASE+51)
-MU_ERR_BADOP = (MU_ERR_BASE+52)
-MU_ERR_BAD_FILENAME = (MU_ERR_BASE+53)
-MU_ERR_READ = (MU_ERR_BASE+54)
-MU_ERR_NO_TRANSPORT = (MU_ERR_BASE+55)
-MU_ERR_AUTH_NO_CRED = (MU_ERR_BASE+56)
-MU_ERR_URL_MISS_PARTS = (MU_ERR_BASE+57)
-MU_ERR_URL_EXTRA_PARTS = (MU_ERR_BASE+58)
-MU_ERR_URL_INVALID_PARAMETER = (MU_ERR_BASE+59)
-MU_ERR_INFO_UNAVAILABLE = (MU_ERR_BASE+60)
-MU_ERR_NONAME = (MU_ERR_BASE+61)
-MU_ERR_BADFLAGS = (MU_ERR_BASE+62)
-MU_ERR_SOCKTYPE = (MU_ERR_BASE+63)
-MU_ERR_FAMILY = (MU_ERR_BASE+64)
-MU_ERR_SERVICE = (MU_ERR_BASE+65)
-MU_ERR_PERM_OWNER_MISMATCH = (MU_ERR_BASE+66)
-MU_ERR_PERM_GROUP_WRITABLE = (MU_ERR_BASE+67)
-MU_ERR_PERM_WORLD_WRITABLE = (MU_ERR_BASE+68)
-MU_ERR_PERM_GROUP_READABLE = (MU_ERR_BASE+69)
-MU_ERR_PERM_WORLD_READABLE = (MU_ERR_BASE+70)
-MU_ERR_PERM_LINKED_WRDIR = (MU_ERR_BASE+71)
-MU_ERR_PERM_DIR_IWGRP = (MU_ERR_BASE+72)
-MU_ERR_PERM_DIR_IWOTH = (MU_ERR_BASE+73)
-MU_ERR_DISABLED = (MU_ERR_BASE+74)
-MU_ERR_LAST = (MU_ERR_BASE+75)