+ prev_varsized_offset = 0
+
+ # as switch does never appear at toplevel,
+ # continue here with type construction
+ if self.is_switch:
+ print "switch", self.name
+ # special: switch C structs get pointer fields for variable-sized members
+ _c_complex(self)
+ # declare switch (un)packing functions
+ _c_accessors(self, name, name)
+
+ # FIXME - in case of request/reply, serialize() is not always needed
+ if self.need_serialize and not self.is_bitcase:
+ if self.c_serialize_name not in finished_serializers:
+ # if not hasattr(self, 'in_reply'):
+ _c_serialize(self)
+ _c_unserialize(self)
+ finished_serializers.append(self.c_serialize_name)
+# _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:
+ # need to set the field up in the xcb_out structure
+ wire_fields.append(field)
+ # fields like 'pad0' are skipped!
+
+ return (param_fields, wire_fields)
+# get_request_fields()
+
+def get_switch_expr_fields(self):
+ # get the fields referenced by the switch expression
+ def get_expr_fields(expr):
+ if expr.op is None:
+ if expr.lenfield_name is not None:
+ return [expr.lenfield_name]
+ else:
+ if expr.op == '~':
+ return get_expr_fields(expr.rhs)
+ elif expr.op == 'popcount':
+ return get_expr_fields(expr.rhs)
+ elif expr.op == 'sumof':
+ return [expr.lenfield_name]
+ elif expr.op == 'enumref':
+ return []
+ else:
+ return get_expr_fields(expr.lhs) + get_expr_fields(expr.rhs)
+ # get_expr_fields()
+
+ # resolve the field names with the parent structure(s)
+ unresolved_fields = get_expr_fields(self.expr)
+ 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 <switch> %s" % self.name)
+
+ params = expr_fields.values()
+ return params
+# get_switch_expr_fields()
+
+def get_serialize_params(self, buffer_var='_buffer', aux_var='_aux', unserialize=False):
+ param_fields, wire_fields = get_request_fields(self)
+ if self.is_switch:
+ param_fields = get_switch_expr_fields(self)
+
+ # _serialize function parameters
+ if not unserialize:
+ params = [('void', '**', buffer_var)]
+ else:
+ params = [('const void', '*', buffer_var)]
+
+ # 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 = ''
+ params.append((typespec, pointerspec, p.c_field_name))
+
+ # parameter fields if any
+ if self.is_switch:
+ for p in get_switch_expr_fields(self):
+ typespec = p.c_field_const_type
+ pointerspec = p.c_pointer
+ params.append((typespec, pointerspec, p.c_field_name))
+
+ # aux argument - structure to be serialized
+ if not unserialize:
+ params.append(('const %s' % self.c_type, '*', aux_var))
+ elif self.is_switch:
+ params.append(('%s' % self.c_type, '*', aux_var))
+ if not self.is_switch and not unserialize:
+ for p in param_fields:
+ if not p.type.fixed_size():
+ params.append((p.c_field_const_type, p.c_pointer, p.c_field_name))
+ return (param_fields, wire_fields, params)
+# get_serialize_params()
+
+def _c_field_mapping(complex_type, context):
+ def get_prefix(field):
+ prefix = ''
+ if context in ('serialize', 'unserialize'):
+ if field.type.fixed_size() or complex_type.is_switch:
+ prefix = '_aux->'
+ else:
+ raise Exception("unknown context '%s' in c_field_mapping" % context)
+ return prefix
+ # get_prefix()
+ def get_field_name(fields, complex_type, prefix=''):
+ for f in complex_type.fields:
+ if '' == prefix:
+ prefix = get_prefix(f)
+
+ fname = "%s%s" % (prefix, 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:
+ new_prefix = "%s%s" % (prefix, f.c_field_name)
+ new_prefix += "." if f.type.is_switch else "->"
+ get_field_name(fields, f.type, new_prefix)
+ # get_field_name()
+
+ # dict(field_name : (c_field_name, field))
+ fields = {}
+ get_field_name(fields, complex_type)
+
+ # switch: get the fields referenced by the switch expr as well
+ # these may not belong to any structure
+ if complex_type.is_switch:
+ fields += get_serialize_params()
+
+ return fields
+# _c_field_mapping()
+
+def _c_serialize_helper_prefix(prefix):
+ prefix_str = prefix
+ lenfield_prefix = "_aux"
+ if prefix != '':
+ prefix_str += "->"
+ lenfield_prefix += "->%s" % prefix
+ return (prefix_str, lenfield_prefix)
+# _c_serialize_helper_prefix
+
+def _c_serialize_helper_insert_padding(context, code_lines, space, count=0):
+ 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 'unserialize' == context:
+ 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_buffer_len += xcb_block_len + xcb_pad;' % space)
+ code_lines.append('%s xcb_block_len = 0;' % space)
+ return count + 1
+# _c_serialize_helper_insert_padding()
+
+def _c_serialize_helper_switch(self, context, complex_name, code_lines, temp_vars, space, prefix, prefix_str):
+ switch_expr = _c_accessor_get_expr(self.expr)
+ for b in self.bitcases:
+ bitcase_expr = _c_accessor_get_expr(b.type.expr, prefix)
+ code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
+ # FIXME: change function call depending on context
+ if 'unserialize' == context:
+ unserialize_fields(b.type, code_lines, temp_vars, space="%s " % space,
+ prefix="%s%s" % (prefix_str, complex_name), bitcase=True)
+ elif 'serialize' == context:
+ count += serialize_fields(b.type, code_lines, temp_vars, '%s ' % space,
+ prefix="%s%s" % (prefix_str, complex_name),
+ serialize_fixed_size_fields=True, bitcase=True)
+ code_lines.append(' }')
+
+ if 'serialize' == context:
+ count = insert_padding(count)
+ return count
+ if 'unserialize' == context:
+ # padding
+ code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+ #code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
+ code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
+# _c_serialize_helper_switch
+
+def _c_serialize_helper_switch_field(self, field):
+ # switch is handled by this function as a special case
+ args = get_switch_expr_fields(field.type)
+ field_mapping = _c_field_mapping(self, 'unserialize')
+ c_field_names = ''
+ for a in args:
+ c_field_names += "%s, " % field_mapping[a.field_name][0]
+ switch_field_name = field_mapping[field.field_name][0]
+ length = "%s(xcb_tmp, %s&%s)" % (field.type.c_unserialize_name,
+ c_field_names, switch_field_name)
+ return length
+# _c_serialize_helper_switch_field()
+
+def _c_serialize_helper_list_field(context, self, field, lenfield_prefix, code_lines, temp_vars, space):
+ expr = field.type.expr
+ param_fields, wire_fields, params = get_serialize_params(self, unserialize=True)
+ 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 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 = ''
+ list_length = _c_accessor_get_expr(field.type.expr, lenfield_prefix)
+
+ if 'unserialize' == context:
+ length = '%s * sizeof(%s)' % (list_length, field.type.member.c_wiretype)
+ # FIXME? - list with variable-sized elements
+ if field.type.size is None:
+ length = ''
+ temp_vars.add(' unsigned int i, 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_unserialize_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)
+ # errmsg = '%s: warning: list object with variable-sized members not supported for field %s\n'
+ # raise Exception(errmsg % (self.c_type, field.c_field_name))
+
+ return length
+# _c_serialize_helper_list_field()
+
+def unserialize_fields(complex_type, code_lines=[], temp_vars=set(), space='', prefix='', bitcase=False):
+ need_padding = False
+
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ if hasattr(complex_type, 'type'):
+ self = complex_type.type
+ complex_name = complex_type.name
+ else:
+ self = complex_type
+ complex_name = '_aux'
+
+ # special case: switch is serialized by evaluating each bitcase separately
+ if self.is_switch:
+ need_padding = True
+ _c_serialize_helper_switch(self, 'unserialize', complex_name, code_lines, temp_vars, space, prefix, prefix_str)
+
+ # all other data types can be evaluated one field a time
+ else:
+ # fixed sized fields: simply cast the buffer to the respective xcb_out type
+ # this would of course not work for switch/bitcase
+ if not bitcase:
+ _c_serialize_helper_insert_padding('unserialize', code_lines, space)
+
+ for field in self.fields:
+ if not ((field.wire and not field.auto) or field.visible):
+ continue
+
+ # generic length statement
+ length = "sizeof(%s)" % field.c_field_type
+
+ # switch/bitcase: fixed size fields must be considered explicitly
+ if field.type.fixed_size():
+ if bitcase:
+ need_padding = True
+ value = ' _aux->%s = (%s) *xcb_tmp;' % (field.c_field_name, field.type.c_type)
+ # FIXME - lists
+ else:
+ continue
+
+ # fields with variable size
+ elif not field.type.fixed_size():
+ # switch/bitcase: always calculate padding before and after variable sized fields
+ # FIXME
+ if need_padding or bitcase:
+ _c_serialize_helper_insert_padding('unserialize', code_lines, space)
+
+# value = ' *%s = (%s *) xcb_tmp;' % (field.c_field_name, field.type.c_type)
+ value = ''
+
+ if field.type.is_list:
+ length = _c_serialize_helper_list_field('unserialize',
+ self, field, lenfield_prefix,
+ code_lines, temp_vars, space)
+
+ elif field.type.is_switch:
+ length = _c_serialize_helper_switch_field(self, field)
+
+ else:
+ length = "%s(xcb_tmp)" % (field.type.c_unserialize_name)
+ # errmsg = '%s: warning: non-list object of variable size not supported for field %s\n'
+ # raise Exception(errmsg % (self.c_type, field.c_field_name))
+
+ # save unserialization C code
+ if value is not None:
+ if field.type.fixed_size():
+ # field appears in the request structure
+ code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
+ else:
+ code_lines.append('%s /* %s */' % (space, field.c_field_name))
+
+ # _aux->XXX =
+ if value != '':
+ code_lines.append('%s%s' % (space, value))
+ if field.type.fixed_size():
+ code_lines.append('%s xcb_block_len += %s;' % (space, length))
+ code_lines.append('%s xcb_tmp += %s;' % (space, length))
+ else:
+ # padding
+ if length != '':
+ code_lines.append('%s xcb_block_len = %s;' % (space, length))
+ code_lines.append('%s xcb_pad = -xcb_block_len & 3;' % space)
+ code_lines.append('%s xcb_tmp += xcb_block_len + xcb_pad;' % space)
+ code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
+ code_lines.append('%s xcb_block_len = 0;' % space)
+ code_lines.append('%s xcb_pad = 0;' % space)
+ need_padding = False
+# unserialize_fields()
+
+def serialize_fields(complex_type, code_lines=[], temp_vars=set(),
+ space='', prefix='', serialize_fixed_size_fields=False,
+ bitcase=False):
+ """
+ helper routine to build up iovec arrays that will later be copied into a single buffer
+
+ complex_type - encapsulating Type/Field
+ code_lines, temp_vars - containers for generated code & variable declarations
+ space - extra space to be inserted before any statement
+ prefix - prefix to be used for struct members, needed for switch/bitcase mapping
+ bitcase - flags whether fields are bitcase members
+ """
+
+ # count -> no. of entries in xcb_parts array
+ count = 0
+ # flag to mark wether explicit padding needs to be inserted
+ need_padding = False
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ if hasattr(complex_type, 'type'):
+ self = complex_type.type
+ complex_name = complex_type.name
+ else:
+ self = complex_type
+ complex_name = '_aux'
+
+ param_fields, wire_fields, params = get_serialize_params(self, unserialize=True)
+ param_names = [p[2] for p in params]
+
+ def insert_padding(count):
+ 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)
+ 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)
+ code_lines.append('%s }' % space)
+ code_lines.append('%s xcb_buffer_len += xcb_block_len + xcb_pad;' % space)
+ code_lines.append('%s xcb_pad = 0;' % space)
+ code_lines.append('%s xcb_block_len = 0;' % space)
+ need_padding = True
+ return count + 1
+ # insert_padding()
+
+ # special case - if self.is_switch, all fields need to be serialized conditionally
+ if self.is_switch:
+ switch_expr = _c_accessor_get_expr(self.expr)
+ need_padding = True
+
+ for b in self.bitcases:
+ bitcase_expr = _c_accessor_get_expr(b.type.expr, prefix)
+ code_lines.append(' if(%s & %s) {' % (switch_expr, bitcase_expr))
+
+ count += serialize_fields(b.type, code_lines, temp_vars, '%s ' % space,
+ prefix="%s%s" % (prefix_str, complex_name),
+ serialize_fixed_size_fields=True, bitcase=True)
+ code_lines.append(' }')
+ count = insert_padding(count)
+
+ else:
+ for field in self.fields:
+ value = None
+
+ # sort out invisible fields
+ if not ((field.wire and not field.auto) or field.visible):
+ continue
+
+ length = "sizeof(%s)" % field.c_field_type
+
+ # switch/bitcase: fixed size fields are serialized explicitly
+ if field.type.fixed_size() and bitcase:
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) '
+ need_padding = True
+
+ 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.add(' %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:
+ 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
+
+ # fields with variable size
+ elif not field.type.fixed_size():
+ # calculate padding before variable sized fields only if necessary
+ if bitcase or need_padding:
+ count = insert_padding(count)
+ code_lines.append('%s xcb_block_len = 0;' % space)
+ need_padding = False
+
+ code_lines.append('%s /* %s */' % (space, field.c_field_name))
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s%s;' % (prefix_str, field.c_field_name)
+ length = ''
+ code_lines.append('%s%s' % (space, value))
+
+ if field.type.is_list:
+ # list of variable length with variable size elements
+ if field.type.size is None:
+ errmsg = '%s: warning: list object with variable-sized members not supported for field %s\n'
+ sys.stderr.write(errmsg % (self.c_type, field.c_field_name))
+ 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(field.type.expr, lenfield_prefix)))
+ code_lines.append('%s xcb_block_len = %s(xcb_tmp);' % (space, field.type.c_unserialize_name))
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len += xcb_block_len;' % space)
+ code_lines.append('%s xcb_tmp += xcb_block_len;' % space)
+ code_lines.append('%s }' % space)
+ code_lines.append('%s xcb_block_len = xcb_parts[xcb_parts_idx].iov_len;' % space)
+
+ # list of variable length with fixed size elements
+ else:
+ # look if the list's lenfield is a struct member or a function argument
+ lf_prefix = lenfield_prefix
+ # special case: if the list has a length field, its name will returned
+ # unchanged by calling c_accessor_get_length(expr)
+ expr = field.type.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
+ lf_prefix = ''
+
+ length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, lf_prefix),
+ field.type.member.c_wiretype)
+
+ elif field.type.is_switch:
+ # switch is handled at the beginning of this function as a special case
+# count += serialize_fields(field.type, code_lines, temp_vars, space,
+ # prefix="%s%s" % (prefix_str, field.c_field_name))
+ # FIXME - call another serialize
+ value = ''
+ sys.stderr.write("FIXME: call %s" % field.type.c_serialize_name)
+ length = 'undefined'
+ else:
+ # FIXME - variable sized field that is not a list
+ errmsg = '%s: warning: non-list object of variable size not supported for field %s\n'
+ sys.stderr.write(errmsg % (self.c_type, field.c_field_name))
+ length = '%s * sizeof(%s)' % ('undefined', field.type.c_wiretype)
+
+ # save serialization C code using xcb_parts[].iov_base and xcb_parts[].iov_len
+ if value is not None:
+ if field.type.fixed_size():
+ # field belongs to some anchestor structure
+ code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
+ code_lines.append('%s%s' % (space, value))
+ if bitcase:
+ code_lines.append('%s xcb_block_len += %s;' % (space, length))
+ if length != '':
+ if not field.type.fixed_size():
+ code_lines.append('%s xcb_block_len = %s;' % (space, length))
+ code_lines.append('%s xcb_parts[xcb_parts_idx].iov_len = xcb_block_len;' % space)
+ # increase xcb_parts index
+ code_lines.append('%s xcb_parts_idx++;' % space)
+ count += 1
+
+ if not field.type.fixed_size():
+ # FIXME
+ count = insert_padding(count)
+ need_padding = False
+ # raise Exception("obsolete - should not be reached")
+ # code_lines.append('%s xcb_unpadded = xcb_parts[xcb_parts_idx].iov_len;' % space)
+
+ return count
+# serialize_fields()
+
+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(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 p in range(len(params)):
+ line = ""
+ typespec, pointerspec, field_name = params[p]
+ indent = ' '*(len(self.c_serialize_name)+2)
+ # p==0: function declaration
+ if 0==p:
+ 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 p < 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 = set()
+ count = serialize_fields(self, code_lines, temp_vars,
+ serialize_fixed_size_fields=False)
+ # update variable size fields
+ variable_size_fields = count
+ _c(' unsigned int xcb_pad = 0;')
+ _c(' char xcb_pad0[3] = {0, 0, 0};')
+ _c(' struct iovec xcb_parts[%d];', count+1)
+ _c(' unsigned int xcb_parts_idx = 0;')
+ _c(' unsigned int xcb_block_len = 0;')
+ for t in temp_vars:
+ _c(t)
+ _c(' char *xcb_tmp;')
+ _c(' unsigned int i;')
+
+ _c('')
+
+ if variable_size_fields > 0:
+ for l in code_lines:
+ _c(l)
+
+# _c(' /* padding */')
+# _c(' xcb_pad = -xcb_block_len & 3;')
+# _c(' if (0 != xcb_pad) {')
+# _c(' xcb_parts[xcb_parts_idx].iov_base = xcb_pad0;')
+# _c(' xcb_parts[xcb_parts_idx].iov_len = xcb_pad;')
+# _c(' xcb_parts_idx++;')
+# _c(' }')
+# _c(' xcb_buffer_len += xcb_block_len + xcb_pad;')
+ _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(' if (0 != xcb_parts[i].iov_base) {')
+ _c(' memcpy(xcb_tmp, xcb_parts[i].iov_base, xcb_parts[i].iov_len);')
+# _c(' }')
+ _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
+ param_fields, wire_fields, params = get_serialize_params(self, unserialize=True)
+
+ # 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 p in range(len(params)):
+ line = ""
+ typespec, pointerspec, field_name = params[p]
+ indent = ' '*(len(self.c_unserialize_name)+2)
+ # p==0: function declaration
+ if 0==p:
+ line = "%s (" % self.c_unserialize_name
+ indent = ''
+ spacing = ' '*(maxtypelen-len(typespec)-len(pointerspec))
+ line += "%s%s%s %s%s /**< */" % (indent, typespec, spacing, pointerspec, field_name)
+ if p < 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:
+ _c(' const %s *_aux = (%s *)_buffer;', 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;')
+
+ code_lines = []
+ temp_vars = set()
+ unserialize_fields(self, code_lines, temp_vars)
+ for t in temp_vars:
+ _c(t)
+ _c('')
+
+ for l in code_lines:
+ _c(l)
+ _c('')
+ _c(' return xcb_buffer_len;')
+ _c('}')
+# _c_unserialize()