Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20200304155932.20452-3-armbru@redhat.com> Reviewed-by: John Snow <jsnow@redhat.com>
193 lines
5.5 KiB
Python
193 lines
5.5 KiB
Python
#
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# QAPI helper library
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#
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# Copyright IBM, Corp. 2011
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# Copyright (c) 2013-2018 Red Hat Inc.
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#
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# Authors:
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# Anthony Liguori <aliguori@us.ibm.com>
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# Markus Armbruster <armbru@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2.
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# See the COPYING file in the top-level directory.
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import re
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# ENUMName -> ENUM_NAME, EnumName1 -> ENUM_NAME1
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# ENUM_NAME -> ENUM_NAME, ENUM_NAME1 -> ENUM_NAME1, ENUM_Name2 -> ENUM_NAME2
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# ENUM24_Name -> ENUM24_NAME
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def camel_to_upper(value):
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c_fun_str = c_name(value, False)
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if value.isupper():
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return c_fun_str
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new_name = ''
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length = len(c_fun_str)
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for i in range(length):
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c = c_fun_str[i]
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# When c is upper and no '_' appears before, do more checks
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if c.isupper() and (i > 0) and c_fun_str[i - 1] != '_':
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if i < length - 1 and c_fun_str[i + 1].islower():
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new_name += '_'
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elif c_fun_str[i - 1].isdigit():
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new_name += '_'
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new_name += c
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return new_name.lstrip('_').upper()
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def c_enum_const(type_name, const_name, prefix=None):
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if prefix is not None:
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type_name = prefix
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return camel_to_upper(type_name) + '_' + c_name(const_name, False).upper()
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c_name_trans = str.maketrans('.-', '__')
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# Map @name to a valid C identifier.
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# If @protect, avoid returning certain ticklish identifiers (like
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# C keywords) by prepending 'q_'.
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#
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# Used for converting 'name' from a 'name':'type' qapi definition
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# into a generated struct member, as well as converting type names
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# into substrings of a generated C function name.
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# '__a.b_c' -> '__a_b_c', 'x-foo' -> 'x_foo'
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# protect=True: 'int' -> 'q_int'; protect=False: 'int' -> 'int'
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def c_name(name, protect=True):
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# ANSI X3J11/88-090, 3.1.1
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c89_words = set(['auto', 'break', 'case', 'char', 'const', 'continue',
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'default', 'do', 'double', 'else', 'enum', 'extern',
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'float', 'for', 'goto', 'if', 'int', 'long', 'register',
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'return', 'short', 'signed', 'sizeof', 'static',
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'struct', 'switch', 'typedef', 'union', 'unsigned',
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'void', 'volatile', 'while'])
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# ISO/IEC 9899:1999, 6.4.1
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c99_words = set(['inline', 'restrict', '_Bool', '_Complex', '_Imaginary'])
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# ISO/IEC 9899:2011, 6.4.1
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c11_words = set(['_Alignas', '_Alignof', '_Atomic', '_Generic',
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'_Noreturn', '_Static_assert', '_Thread_local'])
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# GCC http://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/C-Extensions.html
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# excluding _.*
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gcc_words = set(['asm', 'typeof'])
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# C++ ISO/IEC 14882:2003 2.11
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cpp_words = set(['bool', 'catch', 'class', 'const_cast', 'delete',
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'dynamic_cast', 'explicit', 'false', 'friend', 'mutable',
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'namespace', 'new', 'operator', 'private', 'protected',
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'public', 'reinterpret_cast', 'static_cast', 'template',
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'this', 'throw', 'true', 'try', 'typeid', 'typename',
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'using', 'virtual', 'wchar_t',
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# alternative representations
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'and', 'and_eq', 'bitand', 'bitor', 'compl', 'not',
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'not_eq', 'or', 'or_eq', 'xor', 'xor_eq'])
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# namespace pollution:
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polluted_words = set(['unix', 'errno', 'mips', 'sparc', 'i386'])
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name = name.translate(c_name_trans)
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if protect and (name in c89_words | c99_words | c11_words | gcc_words
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| cpp_words | polluted_words):
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return 'q_' + name
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return name
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eatspace = '\033EATSPACE.'
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pointer_suffix = ' *' + eatspace
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def genindent(count):
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ret = ''
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for _ in range(count):
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ret += ' '
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return ret
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indent_level = 0
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def push_indent(indent_amount=4):
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global indent_level
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indent_level += indent_amount
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def pop_indent(indent_amount=4):
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global indent_level
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indent_level -= indent_amount
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# Generate @code with @kwds interpolated.
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# Obey indent_level, and strip eatspace.
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def cgen(code, **kwds):
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raw = code % kwds
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if indent_level:
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indent = genindent(indent_level)
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# re.subn() lacks flags support before Python 2.7, use re.compile()
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raw = re.subn(re.compile(r'^(?!(#|$))', re.MULTILINE),
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indent, raw)
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raw = raw[0]
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return re.sub(re.escape(eatspace) + r' *', '', raw)
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def mcgen(code, **kwds):
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if code[0] == '\n':
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code = code[1:]
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return cgen(code, **kwds)
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def c_fname(filename):
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return re.sub(r'[^A-Za-z0-9_]', '_', filename)
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def guardstart(name):
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return mcgen('''
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#ifndef %(name)s
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#define %(name)s
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''',
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name=c_fname(name).upper())
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def guardend(name):
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return mcgen('''
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#endif /* %(name)s */
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''',
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name=c_fname(name).upper())
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def gen_if(ifcond):
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ret = ''
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for ifc in ifcond:
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ret += mcgen('''
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#if %(cond)s
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''', cond=ifc)
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return ret
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def gen_endif(ifcond):
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ret = ''
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for ifc in reversed(ifcond):
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ret += mcgen('''
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#endif /* %(cond)s */
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''', cond=ifc)
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return ret
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def build_params(arg_type, boxed, extra=None):
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ret = ''
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sep = ''
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if boxed:
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assert arg_type
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ret += '%s arg' % arg_type.c_param_type()
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sep = ', '
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elif arg_type:
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assert not arg_type.variants
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for memb in arg_type.members:
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ret += sep
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sep = ', '
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if memb.optional:
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ret += 'bool has_%s, ' % c_name(memb.name)
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ret += '%s %s' % (memb.type.c_param_type(),
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c_name(memb.name))
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if extra:
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ret += sep + extra
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return ret if ret else 'void'
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