45 lines
1.4 KiB
Python
Executable file
45 lines
1.4 KiB
Python
Executable file
#!/usr/bin/python
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"""\
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This script decodes hex floats (e.g., in dmesg) into real floats. In the
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future maybe it will do other emc2-specific dmesg decoding.
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Usage:
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dmesg | decode_dmesg
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"""
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import commands
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import re
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import sys
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def repl(m):
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g = m.group(0)
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s, w, f, e = m.group("s", "w", "f", "e")
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f = f or "0"
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v = int(w, 16) + int(f, 16) * (16 ** -len(f))
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v *= 2**int(e)
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if s: v = -v
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return "%g" % v
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pat = re.compile('(?i)(?P<s>-?)0[xX]'
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'(?P<w>[0-9A-Fa-f])'
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'(\\.(?P<f>[0-9A-Fa-f]*))?[Pp](?P<e>[+-]?[0-9]+)')
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for line in sys.stdin:
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line = pat.sub(repl, line)
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sys.stdout.write(line)
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# Copyright 2010 Jeff Epler <jepler@unpythonic.net>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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