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 AT = 50
  64 OP = 51
  65 ERRORTOKEN = 52
  66 N_TOKENS = 53
  67 NT_OFFSET = 256
  68 #--end constants--
  69
  70 tok_name = {}
  71 for _name, _value in globals().items():
  72     if type(_value) is type(0):
  73         tok_name[_value] = _name
  74 del _name, _value
  75
  76
  77 def ISTERMINAL(x):
  78     return x < NT_OFFSET
  79
  80 def ISNONTERMINAL(x):
  81     return x >= NT_OFFSET
  82
  83 def ISEOF(x):
  84     return x == ENDMARKER
  85
  86
  87 def main():
  88     import re
  89     import sys
  90     args = sys.argv[1:]
  91     inFileName = args and args[0] or "Include/token.h"
  92     outFileName = "Lib/token.py"
  93     if len(args) > 1:
  94         outFileName = args[1]
  95     try:
  96         fp = open(inFileName)
  97     except IOError, err:
  98         sys.stdout.write("I/O error: %s\n" % str(err))
  99         sys.exit(1)
 100     lines = fp.read().split("\n")
 101     fp.close()
 102     prog = re.compile(
 103         "#define[ \t][ \t]*([A-Z0-9][A-Z0-9_]*)[ \t][ \t]*([0-9][0-9]*)",
 104         re.IGNORECASE)
 105     tokens = {}
 106     for line in lines:
 107         match = prog.match(line)
 108         if match:
 109             name, val = match.group(1, 2)
 110             val = int(val)
 111             tokens[val] = name          # reverse so we can sort them...
 112     keys = tokens.keys()
 113     keys.sort()
 114     # load the output skeleton from the target:
 115     try:
 116         fp = open(outFileName)
 117     except IOError, err:
 118         sys.stderr.write("I/O error: %s\n" % str(err))
 119         sys.exit(2)
 120     format = fp.read().split("\n")
 121     fp.close()
 122     try:
 123         start = format.index("#--start constants--") + 1
 124         end = format.index("#--end constants--")
 125     except ValueError:
 126         sys.stderr.write("target does not contain format markers")
 127         sys.exit(3)
 128     lines = []
 129     for val in keys:
 130         lines.append("%s = %d" % (tokens[val], val))
 131     format[start:end] = lines
 132     try:
 133         fp = open(outFileName, 'w')
 134     except IOError, err:
 135         sys.stderr.write("I/O error: %s\n" % str(err))
 136         sys.exit(4)
 137     fp.write("\n".join(format))
 138     fp.close()
 139
 140
 141 if __name__ == "__main__":
 142     main()