mirror of https://github.com/python/cpython
54 lines
1.5 KiB
Python
54 lines
1.5 KiB
Python
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#! /usr/bin/env python3
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# This script generates the symbol.py source file.
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import sys
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import re
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def main(inFileName="Include/graminit.h", outFileName="Lib/symbol.py"):
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try:
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fp = open(inFileName)
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except OSError as err:
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sys.stderr.write("I/O error: %s\n" % str(err))
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sys.exit(1)
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with fp:
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lines = fp.read().split("\n")
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prog = re.compile(
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"#define[ \t][ \t]*([A-Z0-9][A-Z0-9_]*)[ \t][ \t]*([0-9][0-9]*)",
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re.IGNORECASE)
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tokens = {}
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for line in lines:
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match = prog.match(line)
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if match:
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name, val = match.group(1, 2)
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val = int(val)
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tokens[val] = name # reverse so we can sort them...
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keys = sorted(tokens.keys())
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# load the output skeleton from the target:
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try:
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fp = open(outFileName)
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except OSError as err:
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sys.stderr.write("I/O error: %s\n" % str(err))
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sys.exit(2)
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with fp:
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format = fp.read().split("\n")
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try:
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start = format.index("#--start constants--") + 1
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end = format.index("#--end constants--")
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except ValueError:
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sys.stderr.write("target does not contain format markers")
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sys.exit(3)
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lines = []
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for val in keys:
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lines.append("%s = %d" % (tokens[val], val))
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format[start:end] = lines
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try:
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fp = open(outFileName, 'w')
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except OSError as err:
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sys.stderr.write("I/O error: %s\n" % str(err))
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sys.exit(4)
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with fp:
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fp.write("\n".join(format))
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if __name__ == '__main__':
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main(*sys.argv[1:])
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