Adding Fredrik Lundh's _sre.c module and its header files.

NOTE: THIS IS VERY ROUGH ALPHA CODE!

Modules/sre.h

+/*
+ * Secret Labs' Regular Expression Engine
+ * $Id$
+ *
+ * simple regular expression matching engine
+ *
+ * Copyright (c) 1997-2000 by Secret Labs AB.  All rights reserved.
+ *
+ * See the _sre.c file for information on usage and redistribution.
+ */
+
+#ifndef SRE_INCLUDED
+#define SRE_INCLUDED
+
+#include "sre_constants.h"
+
+/* Python objects */
+
+typedef struct {
+    PyObject_HEAD
+    PyObject* code; /* link to the code string object */
+    PyObject* pattern; /* link to the pattern source (or None) */
+    int groups;
+    PyObject* groupindex;
+} PatternObject;
+
+#define PatternObject_GetCode(o) ((void*) PyString_AS_STRING((o)->code))
+
+typedef struct {
+    PyObject_HEAD
+    PyObject* string; /* link to the target string */
+    PatternObject* pattern; /* link to the regex (pattern) object */
+    int groups; /* number of groups (start/end marks) */
+    int mark[2];
+} MatchObject;
+
+#endif
+

Modules/sre_constants.h

+/* generated by sre_constants.py */
+#define SRE_OP_FAILURE 0
+#define SRE_OP_SUCCESS 1
+#define SRE_OP_ANY 2
+#define SRE_OP_ASSERT 3
+#define SRE_OP_AT 4
+#define SRE_OP_BRANCH 5
+#define SRE_OP_CALL 6
+#define SRE_OP_CATEGORY 7
+#define SRE_OP_GROUP 8
+#define SRE_OP_GROUP_IGNORE 9
+#define SRE_OP_IN 10
+#define SRE_OP_IN_IGNORE 11
+#define SRE_OP_JUMP 12
+#define SRE_OP_LITERAL 13
+#define SRE_OP_LITERAL_IGNORE 14
+#define SRE_OP_MARK 15
+#define SRE_OP_MAX_REPEAT 16
+#define SRE_OP_MAX_UNTIL 17
+#define SRE_OP_MAX_REPEAT_ONE 18
+#define SRE_OP_MIN_REPEAT 19
+#define SRE_OP_MIN_UNTIL 20
+#define SRE_OP_NOT_LITERAL 21
+#define SRE_OP_NOT_LITERAL_IGNORE 22
+#define SRE_OP_NEGATE 23
+#define SRE_OP_RANGE 24
+#define SRE_OP_REPEAT 25