self.c_aux_unchecked_name = _n(name + ('aux', 'unchecked'))
self.c_serialize_name = _n(name + ('serialize',))
self.c_unserialize_name = _n(name + ('unserialize',))
+ if hasattr(self, 'reply'):
+ if self.reply is not None:
+ self.c_serialize_name = _n(name + ('reply', 'serialize'))
+ self.c_unserialize_name = _n(name + ('reply', 'unserialize'))
# whether a request or reply has a switch field
self.need_aux = False
first_field_after_varsized = None
for field in self.fields:
- # information about a fields anchestors
- if self.is_reply or hasattr(self, 'in_reply'):
- field.type.in_reply = True
-
_c_type_setup(field.type, field.field_type, ())
if field.type.is_list:
_c_type_setup(field.type.member, field.field_type, ())
# 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
+ # FIXME: 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)
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
+ # field in the xcb_out structure
wire_fields.append(field)
# fields like 'pad0' are skipped!
return (param_fields, wire_fields)
# get_request_fields()
-def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase=False):
- need_padding = False
-
- prefix_str = prefix
- lenfield_prefix = "_aux"
- if prefix != '':
- prefix_str += "->"
- lenfield_prefix += "->%s" % 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]
-
- 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))
- unserialize_fields(b.type, code_lines, space="%s " % space,
- prefix="%s%s" % (prefix_str, complex_name), bitcase=True)
- code_lines.append(' }')
- # 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)
-
-
- else:
- # if not inside switch, simply cast the buffer to the respective xcb_out type
- if not bitcase:
- code_lines.append('%s /* %s */' % (space, self.c_type))
- code_lines.append('%s xcb_buffer_len = sizeof(%s);' % (space, self.c_type))
- code_lines.append('%s /* padding */' % space)
- code_lines.append('%s xcb_buffer_len += -xcb_buffer_len & 3;' % space)
- code_lines.append('%s xcb_tmp += xcb_buffer_len;' % space)
-
- for field in self.fields:
- if not ((field.wire and not field.auto) or field.visible):
- continue
-
- length = "sizeof(%s)" % field.c_field_type
-
- # 1. fields with fixed size need only be filled explicitly inside switch
- 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
- # 2. fields with variable size
- elif not field.type.fixed_size():
- # unserialize: always calculate padding before variable sized fields in bitcase
- # FIXME
- if need_padding or bitcase:
- 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_tmp += xcb_pad;' % space)
- code_lines.append('%s xcb_buffer_len += xcb_pad;' % space)
- code_lines.append('%s xcb_block_len = 0;' % space)
- code_lines.append('%s xcb_pad = 0;' % space)
- code_lines.append('%s }' % space)
-
-# value = ' *%s = (%s *) xcb_tmp;' % (field.c_field_name, field.type.c_type)
- value = ''
- if field.type.is_list:
- # FIXME - list with variable-sized 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))
- expr = field.type.expr
- # look if the list's lenfield is a struct member or a function argument
- lf_prefix = lenfield_prefix
- if expr.lenfield_name == _c_accessor_get_length(expr):
- if expr.lenfield_name in param_names:
- 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 by this function as a special case
- unserialize_fields(field.type, code_lines, space, prefix="%s%s" % (prefix_str, field.c_field_name))
- 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
- 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:
- # take account of padding
- 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 = prefix
- lenfield_prefix = "_aux"
- if prefix != '':
- prefix_str += "->"
- lenfield_prefix += "->%s" % prefix
-
-
- if hasattr(complex_type, 'type'):
- self = complex_type.type
- complex_name = complex_type.name
- else:
- self = complex_type
- complex_name = '_aux'
-
- 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
- # else
- length = "sizeof(%s)" % field.c_field_type
-
- # 1. fields with fixed size
- # fixed size fields are not always handled here,
- # dependent on serialize_fixed_size_fields
- 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
-
- # 2. fields with variable size
- elif not field.type.fixed_size():
- # always calculate padding before variable sized fields
- 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)
- 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:
- length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, lenfield_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
- sys.stderr.write("FIXME: call %s" % field.type.c_serialize_name)
- 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)
-
- # 3. save serialization C code
- if value is not None:
- # set xcb_parts[].iov_base and xcb_parts[].iov_len
- # insert a comment so one can easily trace back to the XML
- 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))
- 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_switch_aux_params(self):
+def get_switch_expr_fields(self):
# get the fields referenced by the switch expression
def get_expr_fields(expr):
if expr.op is None:
expr_fields = dict.fromkeys(unresolved_fields)
for p in reversed(self.parent):
parent_fields = dict((f.field_name, f) for f in p.fields)
- if len(unresolved_fields) == 0:
- break
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 = []
- for name, field in expr_fields.iteritems():
- params.append((field, name))
-
+ params = expr_fields.values()
return params
-# _c_switch_aux_params()
+# get_switch_expr_fields()
-def get_serialize_params(self, buffer_var='_buffer', aux_var='_aux', unserialize=False):
+def get_serialize_params(context, self, buffer_var='_buffer', aux_var='_aux'):
param_fields, wire_fields = get_request_fields(self)
if self.is_switch:
- switch_params = _c_switch_aux_params(self)
- param_fields += [s[0] for s in switch_params]
+ param_fields = get_switch_expr_fields(self)
# _serialize function parameters
- if not unserialize:
+ if 'serialize' == context:
params = [('void', '**', buffer_var)]
- else:
+ elif 'unserialize' == context:
params = [('const void', '*', buffer_var)]
# make sure all required length fields are present
# parameter fields if any
if self.is_switch:
- for p in switch_params:
- typespec = p[0].c_field_const_type
- pointerspec = p[0].c_pointer
- params.append((typespec, pointerspec, p[0].c_field_name))
+ 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:
+ if 'serialize' == context:
params.append(('const %s' % self.c_type, '*', aux_var))
- elif self.is_switch:
+ elif 'unserialize' == context and self.is_switch:
params.append(('%s' % self.c_type, '*', aux_var))
- if not self.is_switch and not unserialize:
+ if not self.is_switch and 'serialize' == context:
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(context, complex_type):
+ 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):
+ continue
+ 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:
+ pass
+# FIXME: fields += get_serialize_params(context, complex_type)
+
+ 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):
+ 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 '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_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
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ 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))
+
+ _c_serialize_helper_fields(context, b.type,
+ code_lines, temp_vars,
+ space="%s " % space,
+ prefix="%s%s" % (prefix_str, complex_name),
+ is_bitcase = True)
+ code_lines.append(' }')
+
+ if 'serialize' == context:
+ count = _c_serialize_helper_insert_padding(context, code_lines, space)
+ if 'unserialize' == context:
+ # 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(self, field):
+ # switch is handled by this function as a special case
+ args = get_switch_expr_fields(field.type)
+ field_mapping = _c_field_mapping('unserialize', self)
+ 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,
+ 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('unserialize', 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 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(expr, lenfield_prefix)
+
+ # default: list with fixed size elements
+ length = '%s * sizeof(%s)' % (list_length, field.type.member.c_wiretype)
+ # list with variable-sized elements
+ if field.type.size is None:
+ length = ''
+ if 'unserialize' == context:
+ temp_vars.add(' unsigned int i;')
+ temp_vars.add(' unsigned int 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)
+ 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)))
+ 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 }' % 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):
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+ code_lines.append('%s /* %s.%s */' % (space, self.c_type, field.c_field_name))
+
+ length = "sizeof(%s)" % field.c_field_type
+
+ if 'unserialize' == context:
+ value = ' _aux->%s = *(%s *)xcb_tmp;' % (field.c_field_name, field.c_field_type)
+ # FIXME? - lists
+ 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.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
+
+ 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 'unserialize' == context:
+ value = ''
+ elif 'serialize' == context:
+ value = ' xcb_parts[xcb_parts_idx].iov_base = (char *) %s%s;' % (prefix_str, field.c_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:
+ length = _c_serialize_helper_list_field(context, self, field,
+ code_lines, temp_vars,
+ space, prefix)
+ elif field.type.is_switch:
+ length = _c_serialize_helper_switch_field(self, field)
+ else:
+ length = "%s(xcb_tmp)" % (field.type.c_unserialize_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
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
+
+ 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 is_bitcase:
+ value, length = _c_serialize_helper_fields_fixed_size(context, self, field,
+ code_lines, temp_vars,
+ space, 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)
+
+ # 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 'unserialize' == context:
+ code_lines.append('%s xcb_tmp += %s;' % (space, length))
+ else:
+ # padding
+ if '' != length:
+ code_lines.append('%s xcb_block_len = %s;' % (space, length))
+ if 'unserialize' == context:
+ 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
+ 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 'unserialize' == context:
+ 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)
variable_size_fields = 0
# maximum space required for type definition of function arguments
maxtypelen = 0
- param_fields, wire_fields, params = get_serialize_params(self)
+ param_fields, wire_fields, params = get_serialize_params('serialize', self)
# determine N(variable_fields)
for field in param_fields:
if variable_size_fields > 0:
code_lines = []
temp_vars = set()
- count = serialize_fields(self, code_lines, temp_vars,
- serialize_fixed_size_fields=False)
+ count =_c_serialize_helper('serialize', self,
+ code_lines, temp_vars)
# 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;')
+ temp_vars.add(' unsigned int xcb_pad = 0;')
+ temp_vars.add(' char xcb_pad0[3] = {0, 0, 0};')
+ temp_vars.add(' struct iovec xcb_parts[%d];' % (count+1))
+ temp_vars.add(' unsigned int xcb_parts_idx = 0;')
+ temp_vars.add(' unsigned int xcb_block_len = 0;')
+ temp_vars.add(' unsigned int i;')
+ temp_vars.add(' char *xcb_tmp;')
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
# 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('')
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)
+ param_fields, wire_fields, params = get_serialize_params('unserialize', self)
# determine N(variable_fields)
for field in param_fields:
_c(' unsigned int xcb_buffer_len = 0;')
_c(' unsigned int xcb_block_len = 0;')
_c(' unsigned int xcb_pad = 0;')
- _c('')
code_lines = []
- unserialize_fields(self, code_lines)
+ temp_vars = set()
+ _c_serialize_helper('unserialize', self,
+ code_lines, temp_vars)
+ for t in temp_vars:
+ _c(t)
+ _c('')
+
for l in code_lines:
_c(l)
_c('')
for field in struct_fields:
length = len(field.c_field_type)
- if field.type.fixed_size():
+ # account for '*' pointer_spec
+ if not field.type.fixed_size():
length += 1
- if length > maxtypelen:
- maxtypelen = length
+ maxtypelen = max(maxtypelen, length)
for field in struct_fields:
- if field.type.fixed_size():
+ if (field.type.fixed_size() or
+ # in case of switch with switch children, don't make the field a pointer
+ # necessary for unserialize to work
+ (self.is_switch and field.type.is_switch)):
spacing = ' ' * (maxtypelen - len(field.c_field_type))
_h(' %s%s %s%s; /**< */', field.c_field_type, spacing, field.c_field_name, field.c_subscript)
+
else:
- spacing = ' ' * (maxtypelen - (len(field.c_field_type) - 1))
+ spacing = ' ' * (maxtypelen - (len(field.c_field_type) + 1))
_h(' %s%s *%s%s; /**< */', field.c_field_type, spacing, field.c_field_name, field.c_subscript)
_h('} %s;', self.c_type)
for idx, f in enumerate(serial_fields):
if not aux:
_c(' %s xcb_aux%d;' % (f.type.c_type, idx))
+ else:
+ _c(' void *xcb_aux%d = 0;' % (idx))
_c(' ')
_c(' printf("in function %s\\n");' % func_name)
else:
if not aux:
_c(' xcb_parts[%d].iov_base = (char *) %s;', count, field.c_field_name)
- else:
- _c(' xcb_parts[%d].iov_base = (char *) 0;', count)
idx = serial_fields.index(field)
if not aux:
- serialize_args = get_serialize_params(field.type,
+ serialize_args = get_serialize_params('unserialize', field.type,
field.c_field_name,
'&xcb_aux%d' % idx)[2]
else:
- serialize_args = get_serialize_params(field.type,
- '&xcb_parts[%d].iov_base' % count,
+ serialize_args = get_serialize_params('serialize', field.type,
+ '&xcb_aux%d' % idx,
field.c_field_name)[2]
-
serialize_args = reduce(lambda x,y: "%s, %s" % (x,y), [a[2] for a in serialize_args])
_c(' xcb_parts[%d].iov_len = ', count)
if aux:
_c(' %s (%s);', field.type.c_serialize_name, serialize_args)
- free_calls.append(' free(xcb_parts[%d].iov_base);' % count)
+ _c(' xcb_parts[%d].iov_base = xcb_aux%d;' % (count, idx))
+ free_calls.append(' free(xcb_aux%d);' % idx)
else:
_c(' %s (%s);', field.type.c_unserialize_name, serialize_args)
if field.type.is_list:
projects / free-sw / xcb / libxcb / blobdiff