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- import sys
- import re
-
- pxenv_status_files = ('../../src/include/errno.h', )
- errfile_files = ('../../src/include/gpxe/errfile.h',
- '../../src/arch/i386/include/bits/errfile.h')
- posix_errno_files = ('../../src/include/errno.h', )
-
- PXENV_STATUS_RE = re.compile(r'^#define\s+(PXENV_STATUS_[^\s]+)\s+(.+)$', re.M)
- ERRFILE_RE = re.compile(r'^#define\s+(ERRFILE_[^\s]+)\s+(.+)$', re.M)
- POSIX_ERRNO_RE = re.compile(r'^#define\s+(E[A-Z0-9]+)\s+(?:\\\n)?.*(0x[0-9a-f]+).*$', re.M)
-
- def err(msg):
- sys.stderr.write('%s: %s\n' % (sys.argv[0], msg))
- sys.exit(1)
-
- def to_pxenv_status(errno):
- return errno & 0xff
-
- def to_errfile(errno):
- return (errno >> 13) & 0x7ff
-
- def to_posix_errno(errno):
- return (errno >> 24) & 0x7f
-
- def load_header_file(filename, regexp):
- defines = {}
- data = open(filename, 'r').read()
- for m in regexp.finditer(data):
- key, val = m.groups()
- defines[key] = val
- return defines
-
- def evaluate(defines, expr):
- pyexpr = ''
- for token in expr.split():
- if token in '()':
- pass
- elif token.startswith('/*') or token.startswith('//'):
- break
- elif token.startswith('0x') or token == '|':
- pyexpr += token
- else:
- if token in defines:
- pyexpr += '0x%x' % defines[token]
- else:
- return -1
- if not re.match(r'^[0-9a-zA-Z_|]+$', pyexpr):
- err('invalid expression')
- return eval(pyexpr)
-
- def build(filenames, regexp, selector):
- unevaluated = {}
- for filename in filenames:
- unevaluated.update(load_header_file(filename, regexp))
-
- evaluated = {}
- changed = True
- while changed:
- changed = False
- for key in list(unevaluated.keys()):
- val = evaluate(evaluated, unevaluated[key])
- if val != -1:
- del unevaluated[key]
- evaluated[key] = val
- changed = True
- if unevaluated:
- err('unable to evaluate all #defines')
-
- lookup = {}
- for key, val in evaluated.iteritems():
- lookup[selector(val)] = key
- return lookup
-
- print 'pxenv_status =', repr(build(pxenv_status_files, PXENV_STATUS_RE, to_pxenv_status))
- print 'errfile =', repr(build(errfile_files, ERRFILE_RE, to_errfile))
- print 'posix_errno =', repr(build(posix_errno_files, POSIX_ERRNO_RE, to_posix_errno))
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