Lib/token.py

   1 #! /usr/bin/env python
   2
   3 """Token constants (from "token.h")."""
   4
   5 #  This file is automatically generated; please don't muck it up!
   6 #
   7 #  To update the symbols in this file, 'cd' to the top directory of
   8 #  the python source tree after building the interpreter and run:
   9 #
  10 #    python Lib/token.py
  11
  12 #--start constants--
  13 ENDMARKER = 0
  14 NAME = 1
  15 NUMBER = 2
  16 STRING = 3
  17 NEWLINE = 4
  18 INDENT = 5
  19 DEDENT = 6
  20 LPAR = 7
  21 RPAR = 8
  22 LSQB = 9
  23 RSQB = 10
  24 COLON = 11
  25 COMMA = 12
  26 SEMI = 13
  27 PLUS = 14
  28 MINUS = 15
  29 STAR = 16
  30 SLASH = 17
  31 VBAR = 18
  32 AMPER = 19
  33 LESS = 20
  34 GREATER = 21
  35 EQUAL = 22
  36 DOT = 23
  37 PERCENT = 24
  38 BACKQUOTE = 25
  39 LBRACE = 26
  40 RBRACE = 27
  41 EQEQUAL = 28
  42 NOTEQUAL = 29
  43 LESSEQUAL = 30
  44 GREATEREQUAL = 31
  45 TILDE = 32
  46 CIRCUMFLEX = 33
  47 LEFTSHIFT = 34
  48 RIGHTSHIFT = 35
  49 DOUBLESTAR = 36
  50 PLUSEQUAL = 37
  51 MINEQUAL = 38
  52 STAREQUAL = 39
  53 SLASHEQUAL = 40
  54 PERCENTEQUAL = 41
  55 AMPEREQUAL = 42
  56 VBAREQUAL = 43
  57 CIRCUMFLEXEQUAL = 44
  58 LEFTSHIFTEQUAL = 45
  59 RIGHTSHIFTEQUAL = 46
  60 DOUBLESTAREQUAL = 47
  61 DOUBLESLASH = 48
  62 DOUBLESLASHEQUAL = 49
  63 OP = 50
  64 ERRORTOKEN = 51
  65 N_TOKENS = 52
  66 NT_OFFSET = 256
  67 #--end constants--
  68
  69 tok_name = {}
  70 for _name, _value in globals().items():
  71     if type(_value) is type(0):
  72         tok_name[_value] = _name
  73
  74
  75 def ISTERMINAL(x):
  76     return x < NT_OFFSET
  77
  78 def ISNONTERMINAL(x):
  79     return x >= NT_OFFSET
  80
  81 def ISEOF(x):
  82     return x == ENDMARKER
  83
  84
  85 def main():
  86     import re
  87     import sys
  88     args = sys.argv[1:]
  89     inFileName = args and args[0] or "Include/token.h"
  90     outFileName = "Lib/token.py"
  91     if len(args) > 1:
  92         outFileName = args[1]
  93     try:
  94         fp = open(inFileName)
  95     except IOError, err:
  96         sys.stdout.write("I/O error: %s\n" % str(err))
  97         sys.exit(1)
  98     lines = fp.read().split("\n")
  99     fp.close()
 100     prog = re.compile(
 101         "#define[ \t][ \t]*([A-Z][A-Z_]*)[ \t][ \t]*([0-9][0-9]*)",
 102         re.IGNORECASE)
 103     tokens = {}
 104     for line in lines:
 105         match = prog.match(line)
 106         if match:
 107             name, val = match.group(1, 2)
 108             val = int(val)
 109             tokens[val] = name          # reverse so we can sort them...
 110     keys = tokens.keys()
 111     keys.sort()
 112     # load the output skeleton from the target:
 113     try:
 114         fp = open(outFileName)
 115     except IOError, err:
 116         sys.stderr.write("I/O error: %s\n" % str(err))
 117         sys.exit(2)
 118     format = fp.read().split("\n")
 119     fp.close()
 120     try:
 121         start = format.index("#--start constants--") + 1
 122         end = format.index("#--end constants--")
 123     except ValueError:
 124         sys.stderr.write("target does not contain format markers")
 125         sys.exit(3)
 126     lines = []
 127     for val in keys:
 128         lines.append("%s = %d" % (tokens[val], val))
 129     format[start:end] = lines
 130     try:
 131         fp = open(outFileName, 'w')
 132     except IOError, err:
 133         sys.stderr.write("I/O error: %s\n" % str(err))
 134         sys.exit(4)
 135     fp.write("\n".join(format))
 136     fp.close()
 137
 138
 139 if __name__ == "__main__":
 140     main()