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| author | Nathan Binkert <nate@binkert.org> | 2009-08-16 13:39:58 -0700 |
|---|---|---|
| committer | Nathan Binkert <nate@binkert.org> | 2009-08-16 13:39:58 -0700 |
| commit | e1270f81bdc81f5a575b34c2d2c294bdde3e6f4f (patch) | |
| tree | b54af3469a338609faf04e67603c5264e79d59a5 /ext/ply/example/BASIC/basiclog.py | |
| parent | bcaf93d182f43bf72d52104bb909324945904120 (diff) | |
| download | gem5-e1270f81bdc81f5a575b34c2d2c294bdde3e6f4f.tar.xz | |
ply: update PLY to version 3.2
Diffstat (limited to 'ext/ply/example/BASIC/basiclog.py')
| -rw-r--r-- | ext/ply/example/BASIC/basiclog.py | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/ext/ply/example/BASIC/basiclog.py b/ext/ply/example/BASIC/basiclog.py new file mode 100644 index 000000000..ccfd7b967 --- /dev/null +++ b/ext/ply/example/BASIC/basiclog.py @@ -0,0 +1,79 @@ +# An implementation of Dartmouth BASIC (1964) +# + +import sys +sys.path.insert(0,"../..") + +if sys.version_info[0] >= 3: + raw_input = input + +import logging +logging.basicConfig( + level = logging.INFO, + filename = "parselog.txt", + filemode = "w" +) +log = logging.getLogger() + +import basiclex +import basparse +import basinterp + +# If a filename has been specified, we try to run it. +# If a runtime error occurs, we bail out and enter +# interactive mode below +if len(sys.argv) == 2: + data = open(sys.argv[1]).read() + prog = basparse.parse(data,debug=log) + if not prog: raise SystemExit + b = basinterp.BasicInterpreter(prog) + try: + b.run() + raise SystemExit + except RuntimeError: + pass + +else: + b = basinterp.BasicInterpreter({}) + +# Interactive mode. This incrementally adds/deletes statements +# from the program stored in the BasicInterpreter object. In +# addition, special commands 'NEW','LIST',and 'RUN' are added. +# Specifying a line number with no code deletes that line from +# the program. + +while 1: + try: + line = raw_input("[BASIC] ") + except EOFError: + raise SystemExit + if not line: continue + line += "\n" + prog = basparse.parse(line,debug=log) + if not prog: continue + + keys = list(prog) + if keys[0] > 0: + b.add_statements(prog) + else: + stat = prog[keys[0]] + if stat[0] == 'RUN': + try: + b.run() + except RuntimeError: + pass + elif stat[0] == 'LIST': + b.list() + elif stat[0] == 'BLANK': + b.del_line(stat[1]) + elif stat[0] == 'NEW': + b.new() + + + + + + + + + |