1 files changed, 262 insertions, 0 deletions
diff --git a/Lib/re/_constants.py b/Lib/re/_constants.py
new file mode 100644
index 0000000..c735edf
--- /dev/null
+++ b/Lib/re/_constants.py
@@ -0,0 +1,262 @@
+#
+# Secret Labs' Regular Expression Engine
+#
+# various symbols used by the regular expression engine.
+# run this script to update the _sre include files!
+#
+# Copyright (c) 1998-2001 by Secret Labs AB.  All rights reserved.
+#
+# See the __init__.py file for information on usage and redistribution.
+#
+
+"""Internal support module for sre"""
+
+# update when constants are added or removed
+
+MAGIC = 20220318
+
+from _sre import MAXREPEAT, MAXGROUPS
+
+# SRE standard exception (access as sre.error)
+# should this really be here?
+
+class error(Exception):
+    """Exception raised for invalid regular expressions.
+
+    Attributes:
+
+        msg: The unformatted error message
+        pattern: The regular expression pattern
+        pos: The index in the pattern where compilation failed (may be None)
+        lineno: The line corresponding to pos (may be None)
+        colno: The column corresponding to pos (may be None)
+    """
+
+    __module__ = 're'
+
+    def __init__(self, msg, pattern=None, pos=None):
+        self.msg = msg
+        self.pattern = pattern
+        self.pos = pos
+        if pattern is not None and pos is not None:
+            msg = '%s at position %d' % (msg, pos)
+            if isinstance(pattern, str):
+                newline = '\n'
+            else:
+                newline = b'\n'
+            self.lineno = pattern.count(newline, 0, pos) + 1
+            self.colno = pos - pattern.rfind(newline, 0, pos)
+            if newline in pattern:
+                msg = '%s (line %d, column %d)' % (msg, self.lineno, self.colno)
+        else:
+            self.lineno = self.colno = None
+        super().__init__(msg)
+
+
+class _NamedIntConstant(int):
+    def __new__(cls, value, name):
+        self = super(_NamedIntConstant, cls).__new__(cls, value)
+        self.name = name
+        return self
+
+    def __repr__(self):
+        return self.name
+
+MAXREPEAT = _NamedIntConstant(MAXREPEAT, 'MAXREPEAT')
+
+def _makecodes(names):
+    names = names.strip().split()
+    items = [_NamedIntConstant(i, name) for i, name in enumerate(names)]
+    globals().update({item.name: item for item in items})
+    return items
+
+# operators
+# failure=0 success=1 (just because it looks better that way :-)
+OPCODES = _makecodes("""
+    FAILURE SUCCESS
+
+    ANY ANY_ALL
+    ASSERT ASSERT_NOT
+    AT
+    BRANCH
+    CALL
+    CATEGORY
+    CHARSET BIGCHARSET
+    GROUPREF GROUPREF_EXISTS
+    IN
+    INFO
+    JUMP
+    LITERAL
+    MARK
+    MAX_UNTIL
+    MIN_UNTIL
+    NOT_LITERAL
+    NEGATE
+    RANGE
+    REPEAT
+    REPEAT_ONE
+    SUBPATTERN
+    MIN_REPEAT_ONE
+    ATOMIC_GROUP
+    POSSESSIVE_REPEAT
+    POSSESSIVE_REPEAT_ONE
+
+    GROUPREF_IGNORE
+    IN_IGNORE
+    LITERAL_IGNORE
+    NOT_LITERAL_IGNORE
+
+    GROUPREF_LOC_IGNORE
+    IN_LOC_IGNORE
+    LITERAL_LOC_IGNORE
+    NOT_LITERAL_LOC_IGNORE
+
+    GROUPREF_UNI_IGNORE
+    IN_UNI_IGNORE
+    LITERAL_UNI_IGNORE
+    NOT_LITERAL_UNI_IGNORE
+    RANGE_UNI_IGNORE
+
+    MIN_REPEAT MAX_REPEAT
+""")
+del OPCODES[-2:] # remove MIN_REPEAT and MAX_REPEAT
+
+# positions
+ATCODES = _makecodes("""
+    AT_BEGINNING AT_BEGINNING_LINE AT_BEGINNING_STRING
+    AT_BOUNDARY AT_NON_BOUNDARY
+    AT_END AT_END_LINE AT_END_STRING
+
+    AT_LOC_BOUNDARY AT_LOC_NON_BOUNDARY
+
+    AT_UNI_BOUNDARY AT_UNI_NON_BOUNDARY
+""")
+
+# categories
+CHCODES = _makecodes("""
+    CATEGORY_DIGIT CATEGORY_NOT_DIGIT
+    CATEGORY_SPACE CATEGORY_NOT_SPACE
+    CATEGORY_WORD CATEGORY_NOT_WORD
+    CATEGORY_LINEBREAK CATEGORY_NOT_LINEBREAK
+
+    CATEGORY_LOC_WORD CATEGORY_LOC_NOT_WORD
+
+    CATEGORY_UNI_DIGIT CATEGORY_UNI_NOT_DIGIT
+    CATEGORY_UNI_SPACE CATEGORY_UNI_NOT_SPACE
+    CATEGORY_UNI_WORD CATEGORY_UNI_NOT_WORD
+    CATEGORY_UNI_LINEBREAK CATEGORY_UNI_NOT_LINEBREAK
+""")
+
+
+# replacement operations for "ignore case" mode
+OP_IGNORE = {
+    LITERAL: LITERAL_IGNORE,
+    NOT_LITERAL: NOT_LITERAL_IGNORE,
+}
+
+OP_LOCALE_IGNORE = {
+    LITERAL: LITERAL_LOC_IGNORE,
+    NOT_LITERAL: NOT_LITERAL_LOC_IGNORE,
+}
+
+OP_UNICODE_IGNORE = {
+    LITERAL: LITERAL_UNI_IGNORE,
+    NOT_LITERAL: NOT_LITERAL_UNI_IGNORE,
+}
+
+AT_MULTILINE = {
+    AT_BEGINNING: AT_BEGINNING_LINE,
+    AT_END: AT_END_LINE
+}
+
+AT_LOCALE = {
+    AT_BOUNDARY: AT_LOC_BOUNDARY,
+    AT_NON_BOUNDARY: AT_LOC_NON_BOUNDARY
+}
+
+AT_UNICODE = {
+    AT_BOUNDARY: AT_UNI_BOUNDARY,
+    AT_NON_BOUNDARY: AT_UNI_NON_BOUNDARY
+}
+
+CH_LOCALE = {
+    CATEGORY_DIGIT: CATEGORY_DIGIT,
+    CATEGORY_NOT_DIGIT: CATEGORY_NOT_DIGIT,
+    CATEGORY_SPACE: CATEGORY_SPACE,
+    CATEGORY_NOT_SPACE: CATEGORY_NOT_SPACE,
+    CATEGORY_WORD: CATEGORY_LOC_WORD,
+    CATEGORY_NOT_WORD: CATEGORY_LOC_NOT_WORD,
+    CATEGORY_LINEBREAK: CATEGORY_LINEBREAK,
+    CATEGORY_NOT_LINEBREAK: CATEGORY_NOT_LINEBREAK
+}
+
+CH_UNICODE = {
+    CATEGORY_DIGIT: CATEGORY_UNI_DIGIT,
+    CATEGORY_NOT_DIGIT: CATEGORY_UNI_NOT_DIGIT,
+    CATEGORY_SPACE: CATEGORY_UNI_SPACE,
+    CATEGORY_NOT_SPACE: CATEGORY_UNI_NOT_SPACE,
+    CATEGORY_WORD: CATEGORY_UNI_WORD,
+    CATEGORY_NOT_WORD: CATEGORY_UNI_NOT_WORD,
+    CATEGORY_LINEBREAK: CATEGORY_UNI_LINEBREAK,
+    CATEGORY_NOT_LINEBREAK: CATEGORY_UNI_NOT_LINEBREAK
+}
+
+# flags
+SRE_FLAG_TEMPLATE = 1 # template mode (disable backtracking)
+SRE_FLAG_IGNORECASE = 2 # case insensitive
+SRE_FLAG_LOCALE = 4 # honour system locale
+SRE_FLAG_MULTILINE = 8 # treat target as multiline string
+SRE_FLAG_DOTALL = 16 # treat target as a single string
+SRE_FLAG_UNICODE = 32 # use unicode "locale"
+SRE_FLAG_VERBOSE = 64 # ignore whitespace and comments
+SRE_FLAG_DEBUG = 128 # debugging
+SRE_FLAG_ASCII = 256 # use ascii "locale"
+
+# flags for INFO primitive
+SRE_INFO_PREFIX = 1 # has prefix
+SRE_INFO_LITERAL = 2 # entire pattern is literal (given by prefix)
+SRE_INFO_CHARSET = 4 # pattern starts with character from given set
+
+if __name__ == "__main__":
+    def dump(f, d, prefix):
+        items = sorted(d)
+        for item in items:
+            f.write("#define %s_%s %d\n" % (prefix, item, item))
+    with open("sre_constants.h", "w") as f:
+        f.write("""\
+/*
+ * Secret Labs' Regular Expression Engine
+ *
+ * regular expression matching engine
+ *
+ * NOTE: This file is generated by Lib/re/_constants.py.  If you need
+ * to change anything in here, edit Lib/re/_constants.py and run it.
+ *
+ * Copyright (c) 1997-2001 by Secret Labs AB.  All rights reserved.
+ *
+ * See the _sre.c file for information on usage and redistribution.
+ */
+
+""")
+
+        f.write("#define SRE_MAGIC %d\n" % MAGIC)
+
+        dump(f, OPCODES, "SRE_OP")
+        dump(f, ATCODES, "SRE")
+        dump(f, CHCODES, "SRE")
+
+        f.write("#define SRE_FLAG_TEMPLATE %d\n" % SRE_FLAG_TEMPLATE)
+        f.write("#define SRE_FLAG_IGNORECASE %d\n" % SRE_FLAG_IGNORECASE)
+        f.write("#define SRE_FLAG_LOCALE %d\n" % SRE_FLAG_LOCALE)
+        f.write("#define SRE_FLAG_MULTILINE %d\n" % SRE_FLAG_MULTILINE)
+        f.write("#define SRE_FLAG_DOTALL %d\n" % SRE_FLAG_DOTALL)
+        f.write("#define SRE_FLAG_UNICODE %d\n" % SRE_FLAG_UNICODE)
+        f.write("#define SRE_FLAG_VERBOSE %d\n" % SRE_FLAG_VERBOSE)
+        f.write("#define SRE_FLAG_DEBUG %d\n" % SRE_FLAG_DEBUG)
+        f.write("#define SRE_FLAG_ASCII %d\n" % SRE_FLAG_ASCII)
+
+        f.write("#define SRE_INFO_PREFIX %d\n" % SRE_INFO_PREFIX)
+        f.write("#define SRE_INFO_LITERAL %d\n" % SRE_INFO_LITERAL)
+        f.write("#define SRE_INFO_CHARSET %d\n" % SRE_INFO_CHARSET)
+
+    print("done")