15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2010 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/win/scoped_bstr.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace base { 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace win { 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedBstr::ScopedBstr(const char16* non_bstr) 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : bstr_(SysAllocString(non_bstr)) { 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)ScopedBstr::~ScopedBstr() { 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) COMPILE_ASSERT(sizeof(ScopedBstr) == sizeof(BSTR), ScopedBstrSize); 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SysFreeString(bstr_); 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ScopedBstr::Reset(BSTR bstr) { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) if (bstr != bstr_) { 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // if |bstr_| is NULL, SysFreeString does nothing. 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) SysFreeString(bstr_); 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bstr_ = bstr; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BSTR ScopedBstr::Release() { 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BSTR bstr = bstr_; 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bstr_ = NULL; 325821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return bstr; 335821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ScopedBstr::Swap(ScopedBstr& bstr2) { 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) BSTR tmp = bstr_; 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bstr_ = bstr2.bstr_; 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) bstr2.bstr_ = tmp; 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BSTR* ScopedBstr::Receive() { 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(!bstr_) << "BSTR leak."; 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return &bstr_; 445821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 455821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 465821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BSTR ScopedBstr::Allocate(const char16* str) { 475821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Reset(SysAllocString(str)); 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return bstr_; 495821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 515821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)BSTR ScopedBstr::AllocateBytes(size_t bytes) { 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) Reset(SysAllocStringByteLen(NULL, static_cast<UINT>(bytes))); 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return bstr_; 545821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 555821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 565821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void ScopedBstr::SetByteLen(size_t bytes) { 575821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(bstr_ != NULL) << "attempting to modify a NULL bstr"; 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) uint32* data = reinterpret_cast<uint32*>(bstr_); 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) data[-1] = static_cast<uint32>(bytes); 605821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 615821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 625821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t ScopedBstr::Length() const { 635821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SysStringLen(bstr_); 645821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)size_t ScopedBstr::ByteLength() const { 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return SysStringByteLen(bstr_); 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace win 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace base 72