67 lines
2.0 KiB
Python
67 lines
2.0 KiB
Python
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#!/usr/bin/env python
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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/gpxe/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+(.+)$')
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ERRFILE_RE = re.compile(r'^#define\s+(ERRFILE_[^\s]+)\s+(.+)$')
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POSIX_ERRNO_RE = re.compile(r'^#define\s+(E[A-Z]+)\s+.*(0x[0-9a-f]+).*$')
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def err(msg):
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sys.stderr.write('%s: %s\n' % (sys.argv[0], msg))
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sys.exit(1)
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def load_header_file(filename, regexp):
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defines = {}
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for line in open(filename, 'r'):
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m = regexp.match(line)
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if m:
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key, val = m.groups()
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defines[key] = val
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return defines
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def evaluate(defines, expr):
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pyexpr = ''
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for token in expr.split():
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if token in '()':
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pass
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elif token.startswith('/*') or token.startswith('//'):
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break
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elif token.startswith('0x') or token == '|':
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pyexpr += token
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else:
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if token in defines:
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pyexpr += '0x%x' % defines[token]
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else:
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return -1
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if not re.match(r'^[0-9a-zA-Z_|]+$', pyexpr):
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err('invalid expression')
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return eval(pyexpr)
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def build(filenames, regexp):
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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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return evaluated
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print 'pxenv_status =', repr(build(pxenv_status_files, PXENV_STATUS_RE))
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print 'errfile =', repr(build(errfile_files, ERRFILE_RE))
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print 'posix_errno =', repr(build(posix_errno_files, POSIX_ERRNO_RE))
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