/usr/src/openvswitch-1.4.0/build-aux/extract-ofp-errors is in openvswitch-datapath-dkms 1.4.0-1ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
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 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 | #! /usr/bin/python
import sys
import os.path
import re
macros = {}
token = None
line = ""
idRe = "[a-zA-Z_][a-zA-Z_0-9]*"
tokenRe = "#?" + idRe + "|[0-9]+|."
inComment = False
inDirective = False
def getToken():
global token
global line
global inComment
global inDirective
while True:
line = line.lstrip()
if line != "":
if line.startswith("/*"):
inComment = True
line = line[2:]
elif inComment:
commentEnd = line.find("*/")
if commentEnd < 0:
line = ""
else:
inComment = False
line = line[commentEnd + 2:]
else:
match = re.match(tokenRe, line)
token = match.group(0)
line = line[len(token):]
if token.startswith('#'):
inDirective = True
elif token in macros and not inDirective:
line = macros[token] + line
continue
return True
elif inDirective:
token = "$"
inDirective = False
return True
else:
global lineNumber
line = inputFile.readline()
lineNumber += 1
while line.endswith("\\\n"):
line = line[:-2] + inputFile.readline()
lineNumber += 1
if line == "":
if token == None:
fatal("unexpected end of input")
token = None
return False
def fatal(msg):
sys.stderr.write("%s:%d: error at \"%s\": %s\n" % (fileName, lineNumber, token, msg))
sys.exit(1)
def skipDirective():
getToken()
while token != '$':
getToken()
def isId(s):
return re.match(idRe + "$", s) != None
def forceId():
if not isId(token):
fatal("identifier expected")
def forceInteger():
if not re.match('[0-9]+$', token):
fatal("integer expected")
def match(t):
if token == t:
getToken()
return True
else:
return False
def forceMatch(t):
if not match(t):
fatal("%s expected" % t)
def parseTaggedName():
assert token in ('struct', 'union')
name = token
getToken()
forceId()
name = "%s %s" % (name, token)
getToken()
return name
def print_enum(tag, constants, storage_class):
print """
%(storage_class)sconst char *
%(tag)s_to_string(uint16_t value)
{
switch (value) {\
""" % {"tag": tag,
"bufferlen": len(tag) + 32,
"storage_class": storage_class}
for constant in constants:
print " case %s: return \"%s\";" % (constant, constant)
print """\
}
return NULL;
}\
""" % {"tag": tag}
def usage():
argv0 = os.path.basename(sys.argv[0])
print '''\
%(argv0)s, for extracting OpenFlow error codes from header files
usage: %(argv0)s FILE [FILE...]
This program reads the header files specified on the command line and
outputs a C source file for translating OpenFlow error codes into
strings, for use as lib/ofp-errors.c in the Open vSwitch source tree.
This program is specialized for reading include/openflow/openflow.h
and include/openflow/nicira-ext.h. It will not work on arbitrary
header files without extensions.''' % {"argv0": argv0}
sys.exit(0)
def extract_ofp_errors(filenames):
error_types = {}
global fileName
for fileName in filenames:
global inputFile
global lineNumber
inputFile = open(fileName)
lineNumber = 0
while getToken():
if token in ("#ifdef", "#ifndef", "#include",
"#endif", "#elif", "#else", '#define'):
skipDirective()
elif match('enum'):
forceId()
enum_tag = token
getToken()
forceMatch("{")
constants = []
while isId(token):
constants.append(token)
getToken()
if match('='):
while token != ',' and token != '}':
getToken()
match(',')
forceMatch('}')
if enum_tag == "ofp_error_type":
error_types = {}
for error_type in constants:
error_types[error_type] = []
elif enum_tag == 'nx_vendor_code':
pass
elif enum_tag.endswith('_code'):
error_type = 'OFPET_%s' % '_'.join(enum_tag.split('_')[1:-1]).upper()
if error_type not in error_types:
fatal("enum %s looks like an error code enumeration but %s is unknown" % (enum_tag, error_type))
error_types[error_type] += constants
elif token in ('struct', 'union'):
getToken()
forceId()
getToken()
forceMatch('{')
while not match('}'):
getToken()
elif match('OFP_ASSERT') or match('BOOST_STATIC_ASSERT'):
while token != ';':
getToken()
else:
fatal("parse error")
inputFile.close()
print "/* -*- buffer-read-only: t -*- */"
print "#include <config.h>"
print '#include "ofp-errors.h"'
print "#include <inttypes.h>"
print "#include <stdio.h>"
for fileName in sys.argv[1:]:
print '#include "%s"' % fileName
print '#include "type-props.h"'
for error_type, constants in sorted(error_types.items()):
tag = 'ofp_%s_code' % re.sub('^OFPET_', '', error_type).lower()
print_enum(tag, constants, "static ")
print_enum("ofp_error_type", error_types.keys(), "")
print """
const char *
ofp_error_code_to_string(uint16_t type, uint16_t code)
{
switch (type) {\
"""
for error_type in error_types:
tag = 'ofp_%s_code' % re.sub('^OFPET_', '', error_type).lower()
print " case %s:" % error_type
print " return %s_to_string(code);" % tag
print """\
}
return NULL;
}\
"""
if __name__ == '__main__':
if '--help' in sys.argv:
usage()
elif len(sys.argv) < 2:
sys.stderr.write("at least one non-option argument required; "
"use --help for help\n")
sys.exit(1)
else:
extract_ofp_errors(sys.argv[1:])
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