move stuff around and create initial source structure

1 files changed, 0 insertions, 152 deletions

diff --git a/ebnf.py b/ebnf.py
deleted file mode 100644
index 1989118..0000000
--- a/ebnf.py
+++ /dev/null
@@ -1,152 +0,0 @@
-import string
-
-class EBNF:
-    IDENT   = 0
-    LITERAL = 2
-    LPAREN  = 3
-    LBRAK   = 4
-    LBRACE  = 5
-    BAR     = 6
-    EQL     = 7
-    RPAREN  = 8
-    RBRAK   = 9
-    RBRACE  = 10
-    PERIOD  = 11
-    OTHER   = 12
-
-    __input__  = None
-    __char__   = None
-    __symbol__ = None
-    __data__   = None
-
-    def __init__(self, input):
-        self.__input__ = input
-        self.__get_char__()
-
-    def __get_char__(self):
-        self.__char__ = self.__input__.read(1)
-        if self.__char__ == '':
-            raise EOFError
-        return self.__char__
-
-    def __get_sym__(self):
-        self.__data__ = None
-
-        while self.__char__ in string.whitespace:
-            self.__get_char__()
-
-        if self.__char__ in string.letters + "_":
-            self.__symbol__ = self.IDENT
-            self.__data__ = self.__char__
-            while self.__get_char__() in string.letters + "_":
-                self.__data__ += self.__char__
-            return
-
-        elif self.__char__ == '"':
-            self.__symbol__ = self.LITERAL
-            self.__data__ = ""
-            while self.__get_char__() != '"':
-                self.__data__ += self.__char__
-
-        elif self.__char__ == '=':
-            self.__symbol__ = self.EQL
-        elif self.__char__ == '(':
-            self.__symbol__ = self.LPAREN
-        elif self.__char__ == ')':
-            self.__symbol__ = self.RPAREN
-        elif self.__char__ == '[':
-            self.__symbol__ = self.LBRAK
-        elif self.__char__ == ']':
-            self.__symbol__ = self.RBRAK
-        elif self.__char__ == '{':
-            self.__symbol__ = self.LBRACE
-        elif self.__char__ == '}':
-            self.__symbol__ = self.RBRACE
-        elif self.__char__ == '|':
-            self.__symbol__ = self.BAR
-        elif self.__char__ == '.':
-            self.__symbol__ = self.PERIOD
-        else:
-            self.__symbol__ = self.OTHER
-
-        self.__get_char__()
-
-    def __error__(self, num):
-        pos = self.__input__.tell()
-        if pos > self.__lastpos__ + 2:
-            print "ERROR: pos=%d, err=%d, sym=%d" % (pos, num, self.__symbol__)
-            self.__lastpos__ = pos
-
-    def __expression__(self):
-        self.__term__()
-        while self.__symbol__ == self.BAR:
-            self.__get_sym__()
-            self.__term__()
-
-    def __term__(self):
-        self.__factor__()
-        while self.__symbol__ < self.BAR:
-            self.__factor__()
-
-    def __factor__(self):
-        if self.__symbol__ == self.IDENT:
-            print "record(TO, '%s', 1)" % (self.__data__,)
-            self.__get_sym__()
-        elif self.__symbol__ == self.LITERAL:
-            print "record(T1, '%s', 0)" % (self.__data__,)
-            self.__get_sym__()
-        elif self.__symbol__ == self.LPAREN:
-            self.__get_sym__()
-            self.__expression__()
-            if self.__symbol__ == self.RPAREN:
-                self.__get_sym__()
-            else:
-                self.__error__(2)
-        elif self.__symbol__ == self.LBRAK:
-            self.__get_sym__()
-            self.__expression__()
-            if self.__symbol__ == self.RBRAK:
-                self.__get_sym__()
-            else:
-                self.__error__(3)
-        elif self.__symbol__ == self.LBRACE:
-            self.__get_sym__()
-            self.__expression__()
-            if self.__symbol__ == self.RBRACE:
-                self.__get_sym__()
-            else:
-                self.__error__(4)
-        else:
-            self.__error__(5)
-
-    def __production__(self):
-        self.__get_sym__()
-
-        if self.__symbol__ == self.EQL:
-            self.__get_sym__()
-        else:
-            self.__error__(7)
-
-        self.__expression__()
-
-        if self.__symbol__ == self.PERIOD:
-            self.__get_sym__()
-        else:
-            self.__error__(8)
-
-    def __syntax__(self):
-        while self.__symbol__ == self.IDENT:
-            self.__production__()
-
-    def compile(self):
-        try:
-            self.__lastpos__ = 0
-            self.__get_sym__()
-            self.__syntax__()
-        except EOFError:
-            return
-
-if __name__ == '__main__':
-    import sys
-    ebnf = EBNF(sys.stdin)
-    ebnf.compile()