* python/tag.cc: Support 'key in mapping' for TagSections

Support the replacement of mapping.has_key() for sections, and
update the usage in apt/package.py and apt/debfile accordingly.

This is implemented by extending the TagSecType with sequence
methods, but only settings the contains method there.

The TagSecGetAttr() function has been removed and replaced by
the use of the tp_methods slot.

1 files changed, 31 insertions, 16 deletions

diff --git a/python/tag.cc b/python/tag.cc
index 217be290..cab32370 100644
--- a/python/tag.cc
+++ b/python/tag.cc
@@ -174,6 +174,16 @@ static PyObject *TagSecExists(PyObject *Self,PyObject *Args)
    return Py_BuildValue("i",1);
 }
 
+static int TagSecContains(PyObject *Self,PyObject *Arg)
+{
+   char *Name = PyString_AsString(Arg);
+   const char *Start;
+   const char *Stop;
+   if (GetCpp<pkgTagSection>(Self).Find(Name,Start,Stop) == false)
+      return 0;
+   return 1;
+}
+
 static char *doc_Bytes = "Bytes() -> integer";
 static PyObject *TagSecBytes(PyObject *Self,PyObject *Args)
 {
@@ -365,36 +375,41 @@ static PyMethodDef TagSecMethods[] =
    {}
 };
 
-// TagSecGetAttr - Get an attribute - variable/method			/*{{{*/
-// ---------------------------------------------------------------------
-/* */
-static PyObject *TagSecGetAttr(PyObject *Self,char *Name)
-{
-   return Py_FindMethod(TagSecMethods,Self,Name);
-}
-									/*}}}*/
-// Type for a Tag Section
+
+PySequenceMethods TagSecSeqMeth = {0,0,0,0,0,0,0,TagSecContains,0,0};
 PyMappingMethods TagSecMapMeth = {TagSecLength,TagSecMap,0};
 PyTypeObject TagSecType =
 {
    PyObject_HEAD_INIT(&PyType_Type)
-   0,			                // ob_size
-   "TagSection",	                // tp_name
+   0,                                   // ob_size
+   "TagSection",                        // tp_name
    sizeof(TagSecData),                  // tp_basicsize
    0,                                   // tp_itemsize
    // Methods
    TagSecFree,                          // tp_dealloc
-   0,		                        // tp_print
-   TagSecGetAttr,                       // tp_getattr
+   0,                                   // tp_print
+   0,                                   // tp_getattr
    0,                                   // tp_setattr
    0,                                   // tp_compare
    0,                                   // tp_repr
    0,                                   // tp_as_number
-   0,                                   // tp_as_sequence
+   &TagSecSeqMeth,                      // tp_as_sequence
    &TagSecMapMeth,                      // tp_as_mapping
    0,                                   // tp_hash
-   0,					// tp_call
-   TagSecStr,				// tp_str
+   0,                                   // tp_call
+   TagSecStr,                           // tp_str
+   0,                                   // tp_getattro 
+   0,                                   // tp_setattro
+   0,                                   // tp_as_buffer 
+   Py_TPFLAGS_DEFAULT,                  // tp_flags
+   "TagSection Object",                 // tp_doc
+   0,                                   // tp_traverse
+   0,                                   // tp_clear
+   0,                                   // tp_richcompare
+   0,                                   // tp_weaklistoffset
+   0,                                   // tp_iter 
+   0,                                   // tp_iternext
+   TagSecMethods                        // tp_methods
 };
 
 // Method table for the Tag File object