1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
#!/usr/bin/env python
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+(.+)$')
ERRFILE_RE = re.compile(r'^#define\s+(ERRFILE_[^\s]+)\s+(.+)$')
POSIX_ERRNO_RE = re.compile(r'^#define\s+(E[A-Z]+)\s+.*(0x[0-9a-f]+).*$')
def err(msg):
sys.stderr.write('%s: %s\n' % (sys.argv[0], msg))
sys.exit(1)
def load_header_file(filename, regexp):
defines = {}
for line in open(filename, 'r'):
m = regexp.match(line)
if m:
key, val = m.groups()
defines[key] = val
return defines
def evaluate(defines, expr):
pyexpr = ''
for token in expr.split():
if token in '()':
pass
elif token.startswith('/*') or token.startswith('//'):
break
elif token.startswith('0x') or token == '|':
pyexpr += token
else:
if token in defines:
pyexpr += '0x%x' % defines[token]
else:
return -1
if not re.match(r'^[0-9a-zA-Z_|]+$', pyexpr):
err('invalid expression')
return eval(pyexpr)
def build(filenames, regexp):
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')
return evaluated
print 'pxenv_status =', repr(build(pxenv_status_files, PXENV_STATUS_RE))
print 'errfile =', repr(build(errfile_files, ERRFILE_RE))
print 'posix_errno =', repr(build(posix_errno_files, POSIX_ERRNO_RE))
|
