+ prev_varsized_offset = 0
+
+ if self.var_followed_by_fixed_fields:
+ if field.type.fixed_size():
+ field.prev_varsized_field = None
+
+ if self.need_serialize:
+ # when _unserialize() is wanted, create _sizeof() as well for consistency reasons
+ self.need_sizeof = True
+
+ # as switch does never appear at toplevel,
+ # continue here with type construction
+ if self.is_switch:
+ if self.c_type not in finished_switch:
+ finished_switch.append(self.c_type)
+ # special: switch C structs get pointer fields for variable-sized members
+ _c_complex(self)
+ # FIXME: what about accessors & switch (un)packing functions
+ # _c_iterator() does not seem to be the right place to do it,
+ # as the accessors would need any parameters to pass to _unpack() as well
+
+ if not self.is_bitcase:
+ if self.need_serialize:
+ if self.c_serialize_name not in finished_serializers:
+ finished_serializers.append(self.c_serialize_name)
+ _c_serialize(self)
+ # _unpack() and _unserialize() are only needed for special cases
+ if self.is_switch or self.var_followed_by_fixed_fields:
+ _c_unserialize(self)
+ if self.need_sizeof:
+ if self.c_sizeof_name not in finished_sizeof:
+ finished_sizeof.append(self.c_sizeof_name)
+ _c_sizeof_helper(self)
+# _c_type_setup()
+
+def get_request_fields(self):
+ param_fields = []
+ wire_fields = []
+
+ for field in self.fields:
+ if field.visible:
+ # the field should appear as a parameter in the function call
+ param_fields.append(field)
+ if field.wire and not field.auto:
+ if field.type.fixed_size() and not self.is_switch:
+ # field in the xcb_out structure
+ wire_fields.append(field)
+ # fields like 'pad0' are skipped!
+
+ return (param_fields, wire_fields)
+# get_request_fields()
+
+def get_expr_fields(self):
+ # get the fields referenced by switch or list expression
+ def get_expr_field_names(expr):
+ if expr.op is None:
+ if expr.lenfield_name is not None:
+ return [expr.lenfield_name]
+ else:
+ # constant value expr
+ return []
+ else:
+ if expr.op == '~':
+ return get_expr_field_names(expr.rhs)
+ elif expr.op == 'popcount':
+ return get_expr_field_names(expr.rhs)
+ elif expr.op == 'sumof':
+ return [expr.lenfield_name]
+ elif expr.op == 'enumref':
+ return []
+ else:
+ return get_expr_field_names(expr.lhs) + get_expr_field_names(expr.rhs)
+ # get_expr_field_names()
+
+ # resolve the field names with the parent structure(s)
+ unresolved_fields = get_expr_field_names(self.expr)
+ if unresolved_fields is None:
+ return []
+ expr_fields = dict.fromkeys(unresolved_fields)
+ for p in reversed(self.parent):
+ parent_fields = dict((f.field_name, f) for f in p.fields)
+ for f in parent_fields.keys():
+ if f in unresolved_fields:
+ expr_fields[f] = parent_fields[f]
+ unresolved_fields.remove(f)
+ if len(unresolved_fields) == 0:
+ break
+
+ if None in expr_fields.values():
+ raise Exception("could not resolve all fields for %s" % self.name)
+
+ params = expr_fields.values()
+ return params
+# get_expr_fields()
+
+def resolve_fields(anchestor, complex_obj=None):
+ """find fields referenced by anchestor or descendents with external scope"""
+ expr_fields = []
+ unresolved = []
+ all_fields = []
+ if complex_obj is None:
+ complex_obj = anchestor
+ for field in complex_obj.fields:
+ all_fields.append(field)
+ if field.type.is_switch or field.type.is_list:
+ expr_fields += get_expr_fields(field.type)
+ if field.type.is_container:
+ expr_fields += resolve_fields(anchestor, field.type)
+ # try to resolve expr fields
+ for e in expr_fields:
+ if e not in all_fields:
+ unresolved.append(e)
+ return unresolved
+# resolve_fields()
+
+def get_serialize_params(context, self, buffer_var='_buffer', aux_var='_aux'):
+ def add_param(params, param):
+ if param not in params:
+ params.append(param)
+
+ param_fields, wire_fields = get_request_fields(self)
+ if self.is_switch:
+ param_fields = get_expr_fields(self)
+
+ # _serialize function parameters
+ # cannot use set() for params, as series is important
+ params = []
+ if 'serialize' == context:
+ params.append(('void', '**', buffer_var))
+ elif context in ('unserialize', 'unpack', 'sizeof'):
+ params.append(('const void', '*', buffer_var))
+
+ # look for special cases
+ unresolved_fields = resolve_fields(self)
+ for f in unresolved_fields:
+ add_param(params, (f.c_field_type, '', f.c_field_name))
+
+ # make sure all required length fields are present
+ for p in param_fields:
+ if p.visible and not p.wire and not p.auto:
+ typespec = p.c_field_type
+ pointerspec = ''
+ add_param(params, (typespec, pointerspec, p.c_field_name))
+
+ # parameter fields if any
+ if self.is_switch:
+ for p in get_expr_fields(self):
+ typespec = p.c_field_const_type
+ pointerspec = p.c_pointer
+ add_param(params, (typespec, pointerspec, p.c_field_name))
+
+ # aux argument - structure to be serialized
+ if 'serialize' == context:
+ add_param(params, ('const %s' % self.c_type, '*', aux_var))
+ elif 'unserialize' == context:
+ add_param(params, ('%s' % self.c_type, '**', aux_var))
+ elif 'unpack' == context:
+ add_param(params, ('%s' % self.c_type, '*', aux_var))
+
+ if not self.is_switch and 'serialize' == context:
+ for p in param_fields:
+ if not p.type.fixed_size():
+ add_param(params, (p.c_field_const_type, '*', p.c_field_name))
+ return (param_fields, wire_fields, params)
+# get_serialize_params()
+
+def _c_serialize_helper_prefix(prefix, aux_var='_aux', aux_sep='->'):
+ # prefix is a list of (field_name, anchestor object) tuples
+ # concatenate field names
+ prefix_str = ''
+ for name, sep, obj in prefix:
+ prefix_str += name
+ if sep == '':
+ sep = '.' if (obj.is_bitcase and obj.has_name) else '->'
+ prefix_str += sep
+
+ lenfield_prefix = '' if prefix_str.find(aux_var)==0 else aux_var
+
+ if prefix_str != '':
+ if lenfield_prefix != '':
+ lenfield_prefix += aux_sep
+ lenfield_prefix += prefix_str
+ return (prefix_str, lenfield_prefix)
+# _c_serialize_helper_prefix
+
+def _c_field_mapping(context, complex_type, prefix):
+ def get_prefix(field, prefix):
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ if prefix_str == '':
+ if context in ('serialize', 'unserialize'):
+ if field.type.fixed_size() or complex_type.is_switch:
+ prefix_str = '_aux->'
+ else:
+ raise Exception("unknown context '%s' in c_field_mapping" % context)
+ return prefix_str
+ # get_prefix()
+ def get_field_name(fields, complex_type, prefix):
+ for f in complex_type.fields:
+ prefix_str = get_prefix(f, prefix)
+
+ fname = "%s%s" % (prefix_str, f.c_field_name)
+ if fields.has_key(f.field_name):
+ raise Exception("field name %s has been registered before" % f.field_name)
+ fields[f.field_name] = (fname, f)
+ if f.type.is_container:
+ get_field_name(fields, f.type, prefix+[(f.c_field_name, '', f.type)])
+ # get_field_name()
+
+ # dict(field_name : (c_field_name, field))
+ fields = {}
+ get_field_name(fields, complex_type, prefix)
+
+ # switch: get the fields referenced by the switch expr as well
+ # these may not belong to any structure
+ if complex_type.is_switch:
+ pass
+# FIXME: fields += get_serialize_params(context, complex_type)
+
+ return fields
+# _c_field_mapping()
+
+def _c_serialize_helper_insert_padding(context, code_lines, space):
+ code_lines.append('%s xcb_buffer_len += xcb_block_len;' % space)
+ code_lines.append('%s /* padding */' % space)
+ code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+ code_lines.append('%s if (0 != xcb_pad) {' % space)
+
+ if 'serialize' == context:
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;' % space)
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_pad;' % space)
+ code_lines.append('%s xcb_parts_idx++;' % space)
+ elif context in ('unserialize', 'unpack', 'sizeof'):
+ code_lines.append('%s xcb_tmp += xcb_pad;' % space)
+
+ code_lines.append('%s xcb_buffer_len += xcb_pad;' % space)
+ code_lines.append('%s xcb_pad = 0;' % space)
+ code_lines.append('%s }' % space)
+ code_lines.append('%s xcb_block_len = 0;' % space)
+
+ return 1
+# _c_serialize_helper_insert_padding()
+
+def _c_serialize_helper_switch(context, self, complex_name,
+ code_lines, temp_vars,
+ space, prefix):
+ count = 0
+ switch_prefix = prefix + [(complex_name, '->', self)]
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(switch_prefix)
+ switch_expr = _c_accessor_get_expr(self.expr)
+
+ for b in self.bitcases:
+ bitcase_expr = _c_accessor_get_expr(b.type.expr, prefix_str)
+ code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
+ code_lines.append(' printf("entering bitcase section for %%%%d...\\n", %s);' % bitcase_expr)
+ b_prefix = switch_prefix
+ if b.type.has_name:
+ b_prefix = switch_prefix + [(b.c_field_name, '.', b.type)]
+ count += _c_serialize_helper_fields(context, b.type,
+ code_lines, temp_vars,
+ "%s " % space,
+ b_prefix,
+ is_bitcase = True)
+ code_lines.append(' }')
+
+ if 'serialize' == context:
+ count += _c_serialize_helper_insert_padding(context, code_lines, space)
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ # padding
+ code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+ code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
+
+ return count
+# _c_serialize_helper_switch
+
+def _c_serialize_helper_switch_field(context, self, field, c_switch_variable, prefix):
+ # switch is handled by this function as a special case
+ param_fields, wire_fields, params = get_serialize_params(context, self)
+ args = get_expr_fields(field.type)
+ field_mapping = _c_field_mapping(context, self, prefix)
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ # determine which params to pass to _unserialize() and their prefixes
+ switch_len_fields = resolve_fields(self, field.type)
+ bitcase_unresolved = resolve_fields(self, self)
+ if len(bitcase_unresolved) != 0:
+ raise Exception('unresolved fields within bitcase is not supported at this point')
+ c_field_names = ''
+ for a in switch_len_fields:
+ c_field_names += "%s, " % field_mapping[a.c_field_name][0]
+ for a in args:
+ c_field_names += "%s, " % field_mapping[a.c_field_name][0]
+
+ # call _serialize()/_unpack() to determine the actual size
+ if 'serialize' == context:
+ length = "%s(&%s, %s&%s%s)" % (field.type.c_serialize_name, c_switch_variable,
+ c_field_names, prefix_str, field.c_field_name)
+ elif context in ('unserialize', 'unpack'):
+ length = "%s(xcb_tmp, %s&%s%s)" % (field.type.c_unpack_name,
+ c_field_names, prefix_str, field.c_field_name)
+ return length
+# _c_serialize_helper_switch_field()
+
+def _c_serialize_helper_list_field(context, self, field,
+ code_lines, temp_vars,
+ space, prefix):
+ """
+ helper function for (un)serialize to cope with lists of variable length
+ """
+ expr = field.type.expr
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ param_fields, wire_fields, params = get_serialize_params('sizeof', self)
+ param_names = [p[2] for p in params]
+
+ # look if the list's lenfield is a struct member or a function argument
+ # special case: if the list has a length field, its name will be returned
+ # unchanged by calling c_accessor_get_length(expr)
+ if expr.lenfield_name == _c_accessor_get_length(expr):
+ if expr.lenfield_name in param_names:
+ # the length field appears as separate argument in unserialize,
+ # so no need for a prefix
+ lenfield_prefix = ''
+ sep = '.' if (self.is_bitcase and self.has_name) else '->'
+
+ # special case: unserializing of structs where variable and
+ # fixed size fields are intermixed
+ if self.var_followed_by_fixed_fields and 'unserialize' == context:
+ if lenfield_prefix == '_aux':
+ lenfield_prefix = 'xcb_out'
+ sep = '.'
+
+ list_length = _c_accessor_get_expr(expr, lenfield_prefix, sep)
+
+ # default: list with fixed size elements
+ length = '%s * sizeof(%s)' % (list_length, field.type.member.c_wiretype)
+ # list with variable-sized elements
+ if not field.type.member.fixed_size():
+ length = ''
+ if context in ('unserialize', 'sizeof', 'unpack'):
+ int_i = ' unsigned int i;'
+ xcb_tmp_len = ' unsigned int xcb_tmp_len;'
+ if int_i not in temp_vars:
+ temp_vars.append(int_i)
+ if xcb_tmp_len not in temp_vars:
+ temp_vars.append(xcb_tmp_len)
+ code_lines.append("%s for(i=0; i<%s; i++) {" % (space, list_length))
+ code_lines.append("%s xcb_tmp_len = %s(xcb_tmp);" %
+ (space, field.type.c_sizeof_name))
+ code_lines.append("%s xcb_block_len += xcb_tmp_len;" % space)
+ code_lines.append("%s xcb_tmp += xcb_tmp_len;" % space)
+ code_lines.append("%s }" % space)
+ elif 'serialize' == context:
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = 0;' % space)
+ code_lines.append('%s xcb_tmp = (char *) %s%s;' % (space, prefix_str, field.c_field_name))
+ code_lines.append('%s for(i=0; i<%s; i++) { '
+ % (space, _c_accessor_get_expr(expr, lenfield_prefix, sep)))
+ code_lines.append('%s xcb_block_len = %s(xcb_tmp);' % (space, field.type.c_sizeof_name))
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len += xcb_block_len;' % space)
+ code_lines.append('%s }' % space)
+ code_lines.append('%s xcb_block_len = xcb_parts[xcb_parts_idx].iov_len;' % space)
+
+ return length
+# _c_serialize_helper_list_field()
+
+def _c_serialize_helper_fields_fixed_size(context, self, field,
+ code_lines, temp_vars,
+ space, prefix):
+ if not self.is_bitcase:
+ code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
+ else:
+ scoped_name = [p[2].c_type if idx==0 else p[0] for idx, p in enumerate(prefix)]
+ typename = reduce(lambda x,y: "%s.%s" % (x, y), scoped_name)
+ code_lines.append('%s /* %s.%s */' % (space, typename, field.c_field_name))
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ length = "sizeof(%s)" % field.c_field_type
+
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ value = ' %s%s = *(%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
+ if field.type.is_pad and field.type.nmemb > 1:
+ value = ''
+ for i in range(field.type.nmemb):
+ code_lines.append('%s %s%s[%d] = *(%s *)xcb_tmp;' %
+ (space, prefix_str, field.c_field_name, i, field.c_field_type))
+ length += " * %d" % field.type.nmemb
+
+ if field.type.is_list:
+ raise Exception('list with fixed number of elemens unhandled in _unserialize()')
+ elif 'serialize' == context:
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) '
+
+ if field.type.is_expr:
+ # need to register a temporary variable for the expression
+ if field.type.c_type is None:
+ raise Exception("type for field '%s' (expression '%s') unkown" %
+ (field.field_name, _c_accessor_get_expr(field.type.expr)))
+ temp_vars.append(' %s xcb_expr_%s = %s;' % (field.type.c_type, field.field_name,
+ _c_accessor_get_expr(field.type.expr, prefix)))
+ value += "&xcb_expr_%s;" % field.field_name
+
+ elif field.type.is_pad:
+ if field.type.nmemb == 1:
+ value += "&xcb_pad;"
+ else:
+ # FIXME - possible segmentation fault!!
+ value = ' memset(xcb_parts[xcb_parts_idx].iov_base, 0, %d);' % field.type.nmemb
+ length += "*%d" % field.type.nmemb
+
+ else:
+ # non-list type with fixed size
+ if field.type.nmemb == 1:
+ value += "&%s%s;" % (prefix_str, field.c_field_name)
+ # list with nmemb (fixed size) elements
+ else:
+ value += '%s%s;' % (prefix_str, field.c_field_name)
+ length = '%d' % field.type.nmemb
+
+ return (value, length)
+# _c_serialize_helper_fields_fixed_size()
+
+def _c_serialize_helper_fields_variable_size(context, self, field,
+ code_lines, temp_vars,
+ space, prefix):
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ value = ''
+ var_field_name = 'xcb_tmp'
+ if self.var_followed_by_fixed_fields and 'unserialize' == context:
+ value = ' %s = xcb_tmp;' % field.c_field_name
+ temp_vars.append(' %s *%s;' % (field.type.c_type, field.c_field_name))
+ if 'unpack' == context:
+ value = ' %s%s = (%s *)xcb_tmp;' % (prefix_str, field.c_field_name, field.c_field_type)
+ elif 'serialize' == context:
+ address_of = '&' if (self.is_bitcase and self.has_name) else ''
+ var_field_name = "%s%s%s" % (address_of, prefix_str, field.c_field_name)
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s;' % var_field_name
+ length = ''
+
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ code_lines.append('%s /* %s */' % (space, field.c_field_name))
+
+ if field.type.is_list:
+ if value != '':
+ code_lines.append("%s%s" % (space, value))
+ value = ''
+ length = _c_serialize_helper_list_field(context, self, field,
+ code_lines, temp_vars,
+ space, prefix)
+ elif field.type.is_switch:
+ value = ''
+ if context == 'serialize':
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *)0;'
+ length = _c_serialize_helper_switch_field(context, self, field, 'xcb_parts[xcb_parts_idx].iov_base', prefix)
+ else:
+ length = "%s(%s)" % (field.type.c_sizeof_name, var_field_name)
+
+ return (value, length)
+# _c_serialize_helper_fields_variable_size
+
+def _c_serialize_helper_fields(context, self,
+ code_lines, temp_vars,
+ space, prefix, is_bitcase):
+ count = 0
+ need_padding = False
+ prev_field_was_variable = False
+
+ for field in self.fields:
+ if not ((field.wire and not field.auto) or field.visible):
+ continue
+
+ # switch/bitcase: fixed size fields must be considered explicitly
+ if field.type.fixed_size():
+ if self.is_bitcase or self.var_followed_by_fixed_fields:
+ if prev_field_was_variable and need_padding:
+ # insert padding
+ _c_serialize_helper_insert_padding(context, code_lines, space)
+ prev_field_was_variable = False
+ fixed_prefix = prefix
+ if self.var_followed_by_fixed_fields and len(prefix)==0:
+ if 'unserialize' == context:
+ fixed_prefix = [('xcb_out', '.', self)]
+ else:
+ fixed_prefix = [('_aux', '->', self)]
+ value, length = _c_serialize_helper_fields_fixed_size(context, self, field,
+ code_lines, temp_vars,
+ space, fixed_prefix)
+ else:
+ continue
+
+ # fields with variable size
+ else:
+ # switch/bitcase: always calculate padding before and after variable sized fields
+ if need_padding or is_bitcase:
+ _c_serialize_helper_insert_padding(context, code_lines, space)
+
+ value, length = _c_serialize_helper_fields_variable_size(context, self, field,
+ code_lines, temp_vars,
+ space, prefix)
+
+ prev_field_was_variable = True
+
+ # save (un)serialization C code
+ if '' != value:
+ code_lines.append('%s%s' % (space, value))
+ if field.type.fixed_size() and is_bitcase:
+ code_lines.append('%s xcb_block_len += %s;' % (space, length))
+ if context in ('unserialize', 'unpack', 'sizeof'):
+ code_lines.append('%s xcb_tmp += %s;' % (space, length))
+ else:
+ # padding
+ if '' != length:
+ code_lines.append('%s xcb_block_len = %s;' % (space, length))
+ if (not field.type.fixed_size() and
+ self.var_followed_by_fixed_fields and 'unserialize' == context):
+ temp_vars.append(' int %s_len;' % field.c_field_name)
+ code_lines.append(' %s_len = xcb_block_len;' % field.c_field_name)
+ if context in ('unserialize', 'sizeof', 'unpack'):
+ code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
+ if 'serialize' == context:
+ if '' != length:
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_block_len;' % space)
+ code_lines.append('%s xcb_parts_idx++;' % space)
+ count += 1
+ need_padding = True
+
+ return count
+# _c_serialize_helper_fields()
+
+def _c_serialize_helper(context, complex_type,
+ code_lines, temp_vars,
+ space='', prefix=[]):
+ count = 0
+ if hasattr(complex_type, 'type'):
+ self = complex_type.type
+ complex_name = complex_type.name
+ else:
+ self = complex_type
+ if self.var_followed_by_fixed_fields and 'unserialize' == context:
+ complex_name = 'xcb_out'
+ else:
+ complex_name = '_aux'
+
+ # special case: switch is serialized by evaluating each bitcase separately
+ if self.is_switch:
+ count += _c_serialize_helper_switch(context, self, complex_name,
+ code_lines, temp_vars,
+ space, prefix)
+
+ # all other data types can be evaluated one field a time
+ else:
+ # unserialize & fixed size fields: simply cast the buffer to the respective xcb_out type
+ if context in ('unserialize', 'unpack', 'sizeof') and not self.var_followed_by_fixed_fields:
+ code_lines.append('%s xcb_block_len += sizeof(%s);' % (space, self.c_type))
+ code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
+ _c_serialize_helper_insert_padding(context, code_lines, space)
+
+ count += _c_serialize_helper_fields(context, self,
+ code_lines, temp_vars,
+ space, prefix, False)
+ # "final padding"
+ count += _c_serialize_helper_insert_padding(context, code_lines, space)
+
+ return count
+# _c_serialize_helper()
+
+def _c_serialize(self):
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ _hc('')
+ # _serialize() returns the buffer size
+ _hc('int')
+
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+ param_fields, wire_fields, params = get_serialize_params('serialize', self)
+
+ # determine N(variable_fields)
+ for field in param_fields:
+ # if self.is_switch, treat all fields as if they are variable sized
+ if not field.type.fixed_size() or self.is_switch:
+ variable_size_fields += 1
+ # determine maxtypelen
+ for p in params:
+ maxtypelen = max(maxtypelen, len(p[0]) + len(p[1]))
+
+ # write to .c/.h
+ for idx, p in enumerate(params):
+ line = ""
+ typespec, pointerspec, field_name = p
+ indent = ' '*(len(self.c_serialize_name)+2)
+ # p==0: function declaration
+ if 0==idx:
+ line = "%s (" % self.c_serialize_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if idx < len(params)-1:
+ _hc("%s," % line)
+ else:
+ _h("%s);" % line)
+ _c("%s)" % line)
+
+ _c('{')
+ if not self.is_switch:
+ _c(' %s *xcb_out = *_buffer;', self.c_type)
+ _c(' unsigned int xcb_out_pad = -sizeof(%s) & 3;', self.c_type)
+ _c(' unsigned int xcb_buffer_len = sizeof(%s) + xcb_out_pad;', self.c_type)
+ else:
+ _c(' char *xcb_out = *_buffer;')
+ _c(' unsigned int xcb_buffer_len = 0;')
+ if variable_size_fields > 0:
+ code_lines = []
+ temp_vars = []
+ count = _c_serialize_helper('serialize', self,
+ code_lines, temp_vars)
+ # update variable size fields
+ variable_size_fields = count
+ temp_vars.append(' unsigned int xcb_pad = 0;')
+ temp_vars.append(' char xcb_pad0[3] = {0, 0, 0};')
+ temp_vars.append(' struct iovec xcb_parts[%d];' % count)
+ temp_vars.append(' unsigned int xcb_parts_idx = 0;')
+ temp_vars.append(' unsigned int xcb_block_len = 0;')
+ temp_vars.append(' unsigned int i;')
+ temp_vars.append(' char *xcb_tmp;')
+ for t in temp_vars:
+ _c(t)
+
+ _c('')
+
+ if variable_size_fields > 0:
+ for l in code_lines:
+ _c(l)
+ _c('')
+
+ # variable sized fields have been collected, now
+ # allocate memory and copy everything into a continuous memory area
+ _c(' if (NULL == xcb_out) {')
+ _c(' /* allocate memory */')
+ _c(' *_buffer = malloc(xcb_buffer_len);')
+ _c(' xcb_out = *_buffer;')
+ _c(' }')
+ _c('')
+
+ # fill in struct members
+ if not self.is_switch:
+ if len(wire_fields)>0:
+ _c(' *xcb_out = *_aux;')
+
+ # copy variable size fields into the buffer
+ if variable_size_fields > 0:
+ # xcb_out padding
+ if not self.is_switch:
+ _c(' xcb_tmp = (char*)++xcb_out;')
+ _c(' xcb_tmp += xcb_out_pad;')
+ else:
+ _c(' xcb_tmp = xcb_out;')
+
+ # variable sized fields
+ _c(' for(i=0; i<xcb_parts_idx; i++) {')
+ _c(' memcpy(xcb_tmp, xcb_parts[i].iov_base, xcb_parts[i].iov_len);')
+ _c(' xcb_tmp += xcb_parts[i].iov_len;')
+ _c(' }')
+ _c('')
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_serialize()
+
+def _c_unserialize(self):
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ # _unserialize()
+ _hc('')
+ # _unserialize() returns the buffer size as well
+ _hc('int')
+
+
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+ if self.is_switch:
+ context = 'unpack'
+ func_name = self.c_unpack_name
+ else:
+ context = 'unserialize'
+ func_name = self.c_unserialize_name
+ param_fields, wire_fields, params = get_serialize_params(context, self)
+
+ # determine N(variable_fields)
+ for field in param_fields:
+ # if self.is_switch, treat all fields as if they are variable sized
+ if not field.type.fixed_size() or self.is_switch:
+ variable_size_fields += 1
+ # determine maxtypelen
+ for p in params:
+ maxtypelen = max(maxtypelen, len(p[0]) + len(p[1]))
+
+ # write to .c/.h
+ for idx, p in enumerate(params):
+ line = ""
+ typespec, pointerspec, field_name = p
+ indent = ' '*(len(func_name)+2)
+ # p==0: function declaration
+ if 0==idx:
+ line = "%s (" % func_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if idx < len(params)-1:
+ _hc("%s," % line)
+ else:
+ _h("%s);" % line)
+ _c("%s)" % line)
+
+ _c('{')
+ _c(' char *xcb_tmp = (char *)_buffer;')
+ if not self.is_switch:
+ if not self.var_followed_by_fixed_fields:
+ _c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
+ else:
+ _c(' %s xcb_out;', self.c_type)
+ _c(' unsigned int xcb_buffer_len = 0;')
+ _c(' unsigned int xcb_block_len = 0;')
+ _c(' unsigned int xcb_pad = 0;')
+
+ code_lines = []
+ temp_vars = []
+ _c_serialize_helper(context, self,
+ code_lines, temp_vars)
+ for t in temp_vars:
+ _c(t)
+ _c('')
+
+ for l in code_lines:
+ _c(l)
+ _c('')
+
+ if 'unserialize' == context:
+ # allocate memory automatically
+ _c(' if (NULL == *_aux) {')
+ _c(' /* allocate memory */')
+ _c(' *_aux = malloc(xcb_buffer_len);')
+ _c(' }')
+ _c('')
+ _c(' **_aux = xcb_out;')
+ _c(' xcb_tmp = (char *)++(*_aux);')
+ for field in param_fields:
+ if not field.type.fixed_size():
+ _c(' memcpy(xcb_tmp, %s, %s_len);', field.c_field_name, field.c_field_name)
+ _c(' xcb_tmp += %s_len;', field.c_field_name)
+ _c('')
+
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_unserialize()
+
+def _c_sizeof_helper(self):
+ _h_setlevel(1)
+ _c_setlevel(1)
+
+ # _unserialize()
+ _hc('')
+ # _unserialize() returns the buffer size as well
+ _hc('int')
+
+ variable_size_fields = 0
+ # maximum space required for type definition of function arguments
+ maxtypelen = 0
+ param_fields, wire_fields, params = get_serialize_params('sizeof', self)
+
+ # determine N(variable_fields)
+ for field in param_fields:
+ # if self.is_switch, treat all fields as if they are variable sized
+ if not field.type.fixed_size() or self.is_switch:
+ variable_size_fields += 1
+ # determine maxtypelen
+ for p in params:
+ maxtypelen = max(maxtypelen, len(p[0]) + len(p[1]))
+
+ # write to .c/.h
+ for idx, p in enumerate(params):
+ line = ""
+ typespec, pointerspec, field_name = p
+ indent = ' '*(len(self.c_sizeof_name)+2)
+ # p==0: function declaration
+ if 0==idx:
+ line = "%s (" % self.c_sizeof_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if idx < len(params)-1:
+ _hc("%s," % line)
+ else:
+ _h("%s);" % line)
+ _c("%s)" % line)
+
+ _c('{')
+
+ param_names = [p[2] for p in params]
+ if self.is_switch:
+ # switch: call _unpack()
+ _c(' %s _aux;', self.c_type)
+ _c(' return %s(%s, &_aux);', self.c_unpack_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
+ elif self.var_followed_by_fixed_fields:
+ # special case: call _unserialize()
+ _c(' %s *_aux = NULL;', self.c_type)
+ _c(' return %s(%s, &_aux);', self.c_unserialize_name, reduce(lambda x,y: "%s, %s" % (x, y), param_names))
+ # otherwise: evaluate parameters directly
+ else:
+ code_lines = []
+ temp_vars = []
+ _c_serialize_helper('sizeof', self,
+ code_lines, temp_vars)
+ _c(' char *xcb_tmp = (char *)_buffer;')
+ if len(filter(lambda x: x.find('_aux')!=-1, code_lines))>0:
+ if not self.var_followed_by_fixed_fields:
+ _c(' const %s *_aux = (%s *)_buffer;', self.c_type, self.c_type)
+ else:
+ _c(' %s *_aux = malloc(sizeof(%s));', self.c_type, self.c_type)
+ _c(' unsigned int xcb_buffer_len = 0;')
+ _c(' unsigned int xcb_block_len = 0;')
+ _c(' unsigned int xcb_pad = 0;')
+ for t in temp_vars:
+ _c(t)
+ _c('')
+
+ for l in code_lines:
+ _c(l)
+ _c('')
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_sizeof_helper()