| #! /usr/bin/env python3 |
| # This script generates the symbol.py source file. |
| |
| import sys |
| import re |
| |
| def main(inFileName="Include/graminit.h", outFileName="Lib/symbol.py"): |
| try: |
| fp = open(inFileName) |
| except OSError as err: |
| sys.stderr.write("I/O error: %s\n" % str(err)) |
| sys.exit(1) |
| with fp: |
| lines = fp.read().split("\n") |
| prog = re.compile( |
| "#define[ \t][ \t]*([A-Z0-9][A-Z0-9_]*)[ \t][ \t]*([0-9][0-9]*)", |
| re.IGNORECASE) |
| tokens = {} |
| for line in lines: |
| match = prog.match(line) |
| if match: |
| name, val = match.group(1, 2) |
| val = int(val) |
| tokens[val] = name # reverse so we can sort them... |
| keys = sorted(tokens.keys()) |
| # load the output skeleton from the target: |
| try: |
| fp = open(outFileName) |
| except OSError as err: |
| sys.stderr.write("I/O error: %s\n" % str(err)) |
| sys.exit(2) |
| with fp: |
| format = fp.read().split("\n") |
| 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 OSError as err: |
| sys.stderr.write("I/O error: %s\n" % str(err)) |
| sys.exit(4) |
| with fp: |
| fp.write("\n".join(format)) |
| |
| if __name__ == '__main__': |
| main(*sys.argv[1:]) |