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#
# QAPI helper library
#
# Copyright IBM, Corp. 2011
#
# Authors:
# Anthony Liguori <aliguori@us.ibm.com>
#
# This work is licensed under the terms of the GNU GPLv2.
# See the COPYING.LIB file in the top-level directory.
from ordereddict import OrderedDict
def tokenize(data):
while len(data):
ch = data[0]
data = data[1:]
if ch in ['{', '}', ':', ',', '[', ']']:
yield ch
elif ch in ' \n':
None
elif ch == "'":
string = ''
esc = False
while True:
if (data == ''):
raise Exception("Mismatched quotes")
ch = data[0]
data = data[1:]
if esc:
string += ch
esc = False
elif ch == "\\":
esc = True
elif ch == "'":
break
else:
string += ch
yield string
def parse(tokens):
if tokens[0] == '{':
ret = OrderedDict()
tokens = tokens[1:]
while tokens[0] != '}':
key = tokens[0]
tokens = tokens[1:]
tokens = tokens[1:] # :
value, tokens = parse(tokens)
if tokens[0] == ',':
tokens = tokens[1:]
ret[key] = value
tokens = tokens[1:]
return ret, tokens
elif tokens[0] == '[':
ret = []
tokens = tokens[1:]
while tokens[0] != ']':
value, tokens = parse(tokens)
if tokens[0] == ',':
tokens = tokens[1:]
ret.append(value)
tokens = tokens[1:]
return ret, tokens
else:
return tokens[0], tokens[1:]
def evaluate(string):
return parse(map(lambda x: x, tokenize(string)))[0]
def parse_schema(fp):
exprs = []
expr = ''
expr_eval = None
for line in fp:
if line.startswith('#') or line == '\n':
continue
if line.startswith(' '):
expr += line
elif expr:
expr_eval = evaluate(expr)
if expr_eval.has_key('enum'):
add_enum(expr_eval['enum'])
elif expr_eval.has_key('union'):
add_enum('%sKind' % expr_eval['union'])
exprs.append(expr_eval)
expr = line
else:
expr += line
if expr:
expr_eval = evaluate(expr)
if expr_eval.has_key('enum'):
add_enum(expr_eval['enum'])
elif expr_eval.has_key('union'):
add_enum('%sKind' % expr_eval['union'])
exprs.append(expr_eval)
return exprs
def parse_args(typeinfo):
for member in typeinfo:
argname = member
argentry = typeinfo[member]
optional = False
structured = False
if member.startswith('*'):
argname = member[1:]
optional = True
if isinstance(argentry, OrderedDict):
structured = True
yield (argname, argentry, optional, structured)
def de_camel_case(name):
new_name = ''
for ch in name:
if ch.isupper() and new_name:
new_name += '_'
if ch == '-':
new_name += '_'
else:
new_name += ch.lower()
return new_name
def camel_case(name):
new_name = ''
first = True
for ch in name:
if ch in ['_', '-']:
first = True
elif first:
new_name += ch.upper()
first = False
else:
new_name += ch.lower()
return new_name
def c_var(name):
return name.replace('-', '_').lstrip("*")
def c_fun(name):
return c_var(name).replace('.', '_')
def c_list_type(name):
return '%sList' % name
def type_name(name):
if type(name) == list:
return c_list_type(name[0])
return name
enum_types = []
def add_enum(name):
global enum_types
enum_types.append(name)
def is_enum(name):
global enum_types
return (name in enum_types)
def c_type(name):
if name == 'str':
return 'char *'
elif name == 'int':
return 'int64_t'
elif (name == 'int8' or name == 'int16' or name == 'int32' or
name == 'int64' or name == 'uint8' or name == 'uint16' or
name == 'uint32' or name == 'uint64'):
return name + '_t'
elif name == 'size':
return 'uint64_t'
elif name == 'bool':
return 'bool'
elif name == 'number':
return 'double'
elif type(name) == list:
return '%s *' % c_list_type(name[0])
elif is_enum(name):
return name
elif name == None or len(name) == 0:
return 'void'
elif name == name.upper():
return '%sEvent *' % camel_case(name)
else:
return '%s *' % name
def genindent(count):
ret = ""
for i in range(count):
ret += " "
return ret
indent_level = 0
def push_indent(indent_amount=4):
global indent_level
indent_level += indent_amount
def pop_indent(indent_amount=4):
global indent_level
indent_level -= indent_amount
def cgen(code, **kwds):
indent = genindent(indent_level)
lines = code.split('\n')
lines = map(lambda x: indent + x, lines)
return '\n'.join(lines) % kwds + '\n'
def mcgen(code, **kwds):
return cgen('\n'.join(code.split('\n')[1:-1]), **kwds)
def basename(filename):
return filename.split("/")[-1]
def guardname(filename):
guard = basename(filename).rsplit(".", 1)[0]
for substr in [".", " ", "-"]:
guard = guard.replace(substr, "_")
return guard.upper() + '_H'
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