95 lines
2.8 KiB
C++
95 lines
2.8 KiB
C++
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// unsafe.cc -- Go frontend builtin unsafe package.
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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#include "go-system.h"
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#include "go-c.h"
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#include "types.h"
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#include "gogo.h"
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// Set up the builtin unsafe package. This should probably be driven
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// by a table.
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void
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Gogo::import_unsafe(const std::string& local_name, bool is_local_name_exported,
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Location location)
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{
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Location bloc = Linemap::predeclared_location();
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bool add_to_globals;
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Package* package = this->add_imported_package("unsafe", local_name,
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is_local_name_exported,
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"unsafe", "unsafe", location,
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&add_to_globals);
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if (package == NULL)
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{
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go_assert(saw_errors());
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return;
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}
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package->set_location(location);
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this->imports_.insert(std::make_pair("unsafe", package));
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Bindings* bindings = package->bindings();
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// The type may have already been created by an import.
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Named_object* no = package->bindings()->lookup("Pointer");
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if (no == NULL)
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{
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Type* type = Type::make_pointer_type(Type::make_void_type());
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no = bindings->add_type("Pointer", package, type,
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Linemap::unknown_location());
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}
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else
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{
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go_assert(no->package() == package);
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go_assert(no->is_type());
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go_assert(no->type_value()->is_unsafe_pointer_type());
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no->type_value()->set_is_visible();
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}
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Named_type* pointer_type = no->type_value();
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if (add_to_globals)
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this->add_named_type(pointer_type);
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Type* uintptr_type = Type::lookup_integer_type("uintptr");
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// Sizeof.
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Typed_identifier_list* results = new Typed_identifier_list;
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results->push_back(Typed_identifier("", uintptr_type, bloc));
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Function_type* fntype = Type::make_function_type(NULL, NULL, results, bloc);
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fntype->set_is_builtin();
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no = bindings->add_function_declaration("Sizeof", package, fntype, bloc);
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if (add_to_globals)
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this->add_dot_import_object(no);
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// Offsetof.
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results = new Typed_identifier_list;
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results->push_back(Typed_identifier("", uintptr_type, bloc));
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fntype = Type::make_function_type(NULL, NULL, results, bloc);
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fntype->set_is_varargs();
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fntype->set_is_builtin();
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no = bindings->add_function_declaration("Offsetof", package, fntype, bloc);
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if (add_to_globals)
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this->add_dot_import_object(no);
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// Alignof.
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results = new Typed_identifier_list;
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results->push_back(Typed_identifier("", uintptr_type, bloc));
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fntype = Type::make_function_type(NULL, NULL, results, bloc);
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fntype->set_is_varargs();
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fntype->set_is_builtin();
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no = bindings->add_function_declaration("Alignof", package, fntype, bloc);
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if (add_to_globals)
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this->add_dot_import_object(no);
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if (!this->imported_unsafe_)
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{
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go_imported_unsafe();
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this->imported_unsafe_ = true;
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}
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}
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