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, ())
# 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'):
return (param_fields, wire_fields)
# get_request_fields()
-def unserialize_fields(complex_type, code_lines=[], space='', prefix='', bitcase=False):
- need_padding = False
+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
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]
-
+ # special case: switch is serialized by evaluating each bitcase separately
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)
-
-
+ _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:
- # if not inside switch, simply cast the buffer to the respective xcb_out type
+ # 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:
- 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)
+ _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
- # 1. fields with fixed size need only be filled explicitly inside switch
+ # switch/bitcase: fixed size fields must be considered explicitly
if field.type.fixed_size():
if bitcase:
need_padding = True
# FIXME - lists
else:
continue
- # 2. fields with variable size
+
+ # fields with variable size
elif not field.type.fixed_size():
- # unserialize: always calculate padding before variable sized fields in bitcase
+ # switch/bitcase: always calculate padding before and after variable sized fields
# 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)
+ _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:
- # 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)
+ length = _c_serialize_helper_list_field('unserialize',
+ self, field, lenfield_prefix,
+ code_lines, temp_vars, space)
+
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))
+ length = _c_serialize_helper_switch_field(self, field)
+
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)
+ 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 serialization C code
+ # save unserialization C code
if value is not None:
if field.type.fixed_size():
# field appears in the request structure
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))
+ # 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,
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
-
+ prefix_str, lenfield_prefix = _c_serialize_helper_prefix(prefix)
if hasattr(complex_type, 'type'):
self = complex_type.type
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)
# 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
+ # 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
value += '%s%s;' % (prefix_str, field.c_field_name)
length = '%d' % field.type.nmemb
- # 2. fields with variable size
+ # fields with variable size
elif not field.type.fixed_size():
- # always calculate padding before variable sized fields
+ # 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)
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 fixed size elements
else:
- length = '%s * sizeof(%s)' % (_c_accessor_get_expr(field.type.expr, lenfield_prefix),
+ # 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:
# 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)
- # 3. save serialization C code
+ # save serialization C code using xcb_parts[].iov_base and xcb_parts[].iov_len
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))
+ 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
return count
# serialize_fields()
-def _c_switch_aux_params(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)
- 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 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))
-
- return params
-# _c_switch_aux_params()
-
-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:
- switch_params = _c_switch_aux_params(self)
- param_fields += [s[0] for s in switch_params]
-
- # _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 switch_params:
- typespec = p[0].c_field_const_type
- pointerspec = p[0].c_pointer
- params.append((typespec, pointerspec, p[0].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_serialize(self):
_h_setlevel(1)
_c_setlevel(1)
_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()
+ unserialize_fields(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)
projects / platform / upstream / libxcb.git / commitdiff