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83 lines
2 KiB
Python
83 lines
2 KiB
Python
import os
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import re
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import sys
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def _log_line_regex():
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# "0:00:00.777913000 "
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TIME = r"(\d+:\d\d:\d\d\.\d+)\s+"
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# "DEBUG "
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# LEVEL = "([A-Z]+)\s+"
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LEVEL = "(TRACE)\s+"
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# "0x8165430 "
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THREAD = r"(0x[0-9a-f]+)\s+"
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# "GST_REFCOUNTING ", "flacdec "
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CATEGORY = "([A-Za-z0-9_-]+)\s+"
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# " 3089 "
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PID = r"(\d+)\s*"
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FILENAME = r"([^:]*):"
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LINE = r"(\d+):"
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FUNCTION = r"([A-Za-z0-9_]*):"
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# FIXME: When non-g(st)object stuff is logged with *_OBJECT (like
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# buffers!), the address is printed *without* <> brackets!
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OBJECT = "(?:<([^>]+)>)?"
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MESSAGE = "(.+)"
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ANSI = "(?:\x1b\\[[0-9;]*m\\s*)*\\s*"
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return [TIME, ANSI, PID, ANSI, THREAD, ANSI, LEVEL, ANSI, CATEGORY,
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FILENAME, LINE, FUNCTION, ANSI, OBJECT, ANSI, MESSAGE]
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class Parser(object):
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"""
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Helper to parse a tracer log.
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Implements context manager and iterator.
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"""
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# record fields
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F_TIME = 0
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F_PID = 1
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F_THREAD = 2
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F_LEVEL = 3
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F_CATEGORY = 4
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F_FILENAME = 5
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F_LINE = 6
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F_FUNCTION = 7
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F_OBJECT = 8
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F_MESSAGE = 9
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def __init__(self, filename):
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self.filename = filename
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self.log_regex = re.compile(''.join(_log_line_regex()))
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self.file = None
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def __enter__(self):
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if self.filename != '-':
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self.file = open(self.filename, 'rt')
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else:
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self.file = sys.stdin
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return self
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def __exit__(self, *args):
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if self.filename != '-':
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self.file.close()
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self.file = None
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def __iter__(self):
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return self
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def __next__(self):
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log_regex = self.log_regex
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data = self.file
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while True:
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line = next(data)
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match = log_regex.match(line)
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if match:
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g = list(match.groups())
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g[Parser.F_PID] = int(g[Parser.F_PID])
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g[Parser.F_LINE] = int(g[Parser.F_LINE])
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return g
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