94 lines
3.0 KiB
Python
Executable File
94 lines
3.0 KiB
Python
Executable File
#!/usr/bin/env python
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# Copyright (C) 2008 Stefan Hajnoczi <stefanha@gmail.com>.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation; either version 2 of the
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# License, or any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
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import sys
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import re
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pxenv_status_files = ('../../src/include/errno.h', )
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errfile_files = ('../../src/include/ipxe/errfile.h',
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'../../src/arch/i386/include/bits/errfile.h')
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posix_errno_files = ('../../src/include/errno.h', )
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PXENV_STATUS_RE = re.compile(r'^#define\s+(PXENV_STATUS_[^\s]+)\s+(.+)$', re.M)
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ERRFILE_RE = re.compile(r'^#define\s+(ERRFILE_[^\s]+)\s+(.+)$', re.M)
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POSIX_ERRNO_RE = re.compile(r'^#define\s+(E[A-Z0-9]+)\s+(?:\\\n)?.*(0x[0-9a-f]+).*$', re.M)
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def err(msg):
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sys.stderr.write('%s: %s\n' % (sys.argv[0], msg))
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sys.exit(1)
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def to_pxenv_status(errno):
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return errno & 0xff
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def to_errfile(errno):
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return (errno >> 13) & 0x7ff
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def to_posix_errno(errno):
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return (errno >> 24) & 0x7f
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def load_header_file(filename, regexp):
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defines = {}
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data = open(filename, 'r').read()
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for m in regexp.finditer(data):
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key, val = m.groups()
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defines[key] = val
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return defines
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def evaluate(defines, expr):
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pyexpr = ''
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for token in expr.split():
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if token in '()':
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pass
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elif token.startswith('/*') or token.startswith('//'):
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break
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elif token.startswith('0x') or token == '|':
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pyexpr += token
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else:
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if token in defines:
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pyexpr += '0x%x' % defines[token]
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else:
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return -1
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if not re.match(r'^[0-9a-zA-Z_|]+$', pyexpr):
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err('invalid expression')
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return eval(pyexpr)
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def build(filenames, regexp, selector):
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unevaluated = {}
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for filename in filenames:
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unevaluated.update(load_header_file(filename, regexp))
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evaluated = {}
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changed = True
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while changed:
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changed = False
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for key in list(unevaluated.keys()):
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val = evaluate(evaluated, unevaluated[key])
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if val != -1:
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del unevaluated[key]
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evaluated[key] = val
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changed = True
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if unevaluated:
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err('unable to evaluate all #defines')
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lookup = {}
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for key, val in evaluated.iteritems():
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lookup[selector(val)] = key
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return lookup
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print 'pxenv_status =', repr(build(pxenv_status_files, PXENV_STATUS_RE, to_pxenv_status))
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print 'errfile =', repr(build(errfile_files, ERRFILE_RE, to_errfile))
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print 'posix_errno =', repr(build(posix_errno_files, POSIX_ERRNO_RE, to_posix_errno))
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