Lib/token.py

#! /usr/bin/env python
#
#  Tokens (from "token.h")
#
#  This file is automatically generated; please don't muck it up!
#
#  To update the symbols in this file, 'cd' to the top directory of
#  the python source tree after building the interpreter and run:
#
#    PYTHONPATH=./Lib ./python Lib/token.py
#
#  (this path allows the import of string.py and regexmodule.so
#  for a site with no installation in place)

#--start constants--
ENDMARKER = 0
NAME = 1
NUMBER = 2
STRING = 3
NEWLINE = 4
INDENT = 5
DEDENT = 6
LPAR = 7
RPAR = 8
LSQB = 9
RSQB = 10
COLON = 11
COMMA = 12
SEMI = 13
PLUS = 14
MINUS = 15
STAR = 16
SLASH = 17
VBAR = 18
AMPER = 19
LESS = 20
GREATER = 21
EQUAL = 22
DOT = 23
PERCENT = 24
BACKQUOTE = 25
LBRACE = 26
RBRACE = 27
EQEQUAL = 28
NOTEQUAL = 29
LESSEQUAL = 30
GREATEREQUAL = 31
TILDE = 32
CIRCUMFLEX = 33
LEFTSHIFT = 34
RIGHTSHIFT = 35
DOUBLESTAR = 36
OP = 37
ERRORTOKEN = 38
N_TOKENS = 39
NT_OFFSET = 256
#--end constants--

tok_name = {}
for _name, _value in globals().items():
    if type(_value) is type(0):
	tok_name[_value] = _name


def ISTERMINAL(x):
    return x < NT_OFFSET

def ISNONTERMINAL(x):
    return x >= NT_OFFSET

def ISEOF(x):
    return x == ENDMARKER


def main():
    import regex
    import string
    import sys
    args = sys.argv[1:]
    inFileName = args and args[0] or "Include/token.h"
    outFileName = "Lib/token.py"
    if len(args) > 1:
	outFileName = args[1]
    try:
	fp = open(inFileName)
    except IOError, err:
	sys.stdout.write("I/O error: %s\n" % str(err))
	sys.exit(1)
    lines = string.splitfields(fp.read(), "\n")
    fp.close()
    re = regex.compile(
	"#define[ \t][ \t]*\([A-Z][A-Z_]*\)[ \t][ \t]*\([0-9][0-9]*\)",
	regex.casefold)
    tokens = {}
    for line in lines:
	if re.match(line) > -1:
	    name, val = re.group(1, 2)
	    val = string.atoi(val)
	    tokens[val] = name		# reverse so we can sort them...
    keys = tokens.keys()
    keys.sort()
    # load the output skeleton from the target:
    try:
	fp = open(outFileName)
    except IOError, err:
	sys.stderr.write("I/O error: %s\n" % str(err))
	sys.exit(2)
    format = string.splitfields(fp.read(), "\n")
    fp.close()
    try:
	start = format.index("#--start constants--") + 1
	end = format.index("#--end constants--")
    except ValueError:
	sys.stderr.write("target does not contain format markers")
	sys.exit(3)
    lines = []
    for val in keys:
	lines.append("%s = %d" % (tokens[val], val))
    format[start:end] = lines
    try:
	fp = open(outFileName, 'w')
    except IOError, err:
	sys.stderr.write("I/O error: %s\n" % str(err))
	sys.exit(4)
    fp.write(string.joinfields(format, "\n"))
    fp.close()


if __name__ == "__main__":
    main()