return "Wrap" + interface.expr
+
+class ExpanderMixin:
+ '''Mixin class that provides a bunch of methods to expand C expressions
+ from the specifications.'''
+
+ __structs = None
+ __indices = None
+
+ def expand(self, expr):
+ # Expand a C expression, replacing certain variables
+ if not isinstance(expr, basestring):
+ return expr
+ variables = {}
+
+ if self.__structs is not None:
+ variables['self'] = '(%s)' % self.__structs[0]
+ if self.__indices is not None:
+ variables['i'] = self.__indices[0]
+
+ expandedExpr = expr.format(**variables)
+ if expandedExpr != expr and 0:
+ sys.stderr.write(" %r -> %r\n" % (expr, expandedExpr))
+ return expandedExpr
+
+ def visitMember(self, structInstance, member_type, *args, **kwargs):
+ self.__structs = (structInstance, self.__structs)
+ try:
+ return self.visit(member_type, *args, **kwargs)
+ finally:
+ _, self.__structs = self.__structs
+
+ def visitElement(self, element_index, element_type, *args, **kwargs):
+ self.__indices = (element_index, self.__indices)
+ try:
+ return self.visit(element_type, *args, **kwargs)
+ finally:
+ _, self.__indices = self.__indices
+
+
class ComplexValueSerializer(stdapi.OnceVisitor):
'''Type visitors which generates serialization functions for
complex types.
self.visit(const.type)
def visitStruct(self, struct):
- for type, name in struct.members:
- self.visit(type)
- print 'static void _write__%s(const %s &value) {' % (struct.tag, struct.expr)
- print ' static const char * members[%u] = {' % (len(struct.members),)
+ print 'static const char * _struct%s_members[%u] = {' % (struct.tag, len(struct.members))
for type, name, in struct.members:
- print ' "%s",' % (name,)
- print ' };'
- print ' static const trace::StructSig sig = {'
- print ' %u, "%s", %u, members' % (struct.id, struct.name, len(struct.members))
- print ' };'
- print ' trace::localWriter.beginStruct(&sig);'
- for type, name in struct.members:
- self.serializer.visit(type, 'value.%s' % (name,))
- print ' trace::localWriter.endStruct();'
- print '}'
+ print ' "%s",' % (name,)
+ print '};'
+ print 'static const trace::StructSig _struct%s_sig = {' % (struct.tag,)
+ print ' %u, "%s", %u, _struct%s_members' % (struct.id, struct.name, len(struct.members), struct.tag)
+ print '};'
print
def visitArray(self, array):
print
-class ValueSerializer(stdapi.Visitor):
+class ValueSerializer(stdapi.Visitor, ExpanderMixin):
'''Visitor which generates code to serialize any type.
Simple types are serialized inline here, whereas the serialization of
ComplexValueSerializer visitor above.
'''
+ def __init__(self):
+ #stdapi.Visitor.__init__(self)
+ self.indices = []
+ self.instances = []
+
def visitLiteral(self, literal, instance):
print ' trace::localWriter.write%s(%s);' % (literal.kind, instance)
self.visit(const.type, instance)
def visitStruct(self, struct, instance):
- print ' _write__%s(%s);' % (struct.tag, instance)
+ print ' trace::localWriter.beginStruct(&_struct%s_sig);' % (struct.tag,)
+ for type, name in struct.members:
+ self.visitMember(instance, type, '(%s).%s' % (instance, name,))
+ print ' trace::localWriter.endStruct();'
def visitArray(self, array, instance):
length = '_c' + array.type.tag
index = '_i' + array.type.tag
+ array_length = self.expand(array.length)
print ' if (%s) {' % instance
- print ' size_t %s = %s > 0 ? %s : 0;' % (length, array.length, array.length)
+ print ' size_t %s = %s > 0 ? %s : 0;' % (length, array_length, array_length)
print ' trace::localWriter.beginArray(%s);' % length
print ' for (size_t %s = 0; %s < %s; ++%s) {' % (index, index, length, index)
print ' trace::localWriter.beginElement();'
- self.visit(array.type, '(%s)[%s]' % (instance, index))
+ self.visitElement(index, array.type, '(%s)[%s]' % (instance, index))
print ' trace::localWriter.endElement();'
print ' }'
print ' trace::localWriter.endArray();'
print ' }'
def visitBlob(self, blob, instance):
- print ' trace::localWriter.writeBlob(%s, %s);' % (instance, blob.size)
+ print ' trace::localWriter.writeBlob(%s, %s);' % (instance, self.expand(blob.size))
def visitEnum(self, enum, instance):
print ' trace::localWriter.writeEnum(&_enum%s_sig, %s);' % (enum.tag, instance)
self.needsWrapping = True
-class ValueWrapper(stdapi.Traverser):
+class ValueWrapper(stdapi.Traverser, ExpanderMixin):
'''Type visitor which will generate the code to wrap an instance.
Wrapping is necessary mostly for interfaces, however interface pointers can
def visitStruct(self, struct, instance):
for type, name in struct.members:
- self.visit(type, "(%s).%s" % (instance, name))
+ self.visitMember(instance, type, "(%s).%s" % (instance, name))
def visitArray(self, array, instance):
+ array_length = self.expand(array.length)
print " if (%s) {" % instance
- print " for (size_t _i = 0, _s = %s; _i < _s; ++_i) {" % array.length
- self.visit(array.type, instance + "[_i]")
+ print " for (size_t _i = 0, _s = %s; _i < _s; ++_i) {" % array_length
+ self.visitElement('_i', array.type, instance + "[_i]")
print " }"
print " }"
def visitArray(self, array, instance):
if self.allocated or isinstance(instance, stdapi.Interface):
return ValueWrapper.visitArray(self, array, instance)
+ array_length = self.expand(array.length)
elem_type = array.type.mutable()
- print " if (%s && %s) {" % (instance, array.length)
- print " %s * _t = static_cast<%s *>(alloca(%s * sizeof *_t));" % (elem_type, elem_type, array.length)
- print " for (size_t _i = 0, _s = %s; _i < _s; ++_i) {" % array.length
+ print " if (%s && %s) {" % (instance, array_length)
+ print " %s * _t = static_cast<%s *>(alloca(%s * sizeof *_t));" % (elem_type, elem_type, array_length)
+ print " for (size_t _i = 0, _s = %s; _i < _s; ++_i) {" % array_length
print " _t[_i] = %s[_i];" % instance
self.allocated = True
self.visit(array.type, "_t[_i]")
projects / apitrace / blobdiff