| 1 | /* $Id: RTCRestOutputToString.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
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| 2 | /** @file
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| 3 | * IPRT - C++ REST, RTCRestOutputToString implementation.
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| 4 | */
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| 5 |
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| 6 | /*
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| 7 | * Copyright (C) 2018-2020 Oracle Corporation
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| 8 | *
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| 9 | * This file is part of VirtualBox Open Source Edition (OSE), as
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| 10 | * available from http://www.virtualbox.org. This file is free software;
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| 11 | * you can redistribute it and/or modify it under the terms of the GNU
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| 12 | * General Public License (GPL) as published by the Free Software
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| 13 | * Foundation, in version 2 as it comes in the "COPYING" file of the
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| 14 | * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
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| 15 | * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
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| 16 | *
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| 17 | * The contents of this file may alternatively be used under the terms
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| 18 | * of the Common Development and Distribution License Version 1.0
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| 19 | * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
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| 20 | * VirtualBox OSE distribution, in which case the provisions of the
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| 21 | * CDDL are applicable instead of those of the GPL.
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| 22 | *
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| 23 | * You may elect to license modified versions of this file under the
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| 24 | * terms and conditions of either the GPL or the CDDL or both.
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| 25 | */
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| 26 |
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| 27 |
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| 28 | /*********************************************************************************************************************************
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| 29 | * Header Files *
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| 30 | *********************************************************************************************************************************/
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| 31 | #define LOG_GROUP RTLOGGROUP_REST
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| 32 | #include <iprt/cpp/restoutput.h>
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| 33 |
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| 34 | #include <iprt/errcore.h>
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| 35 | #include <iprt/string.h>
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| 36 |
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| 37 |
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| 38 | RTCRestOutputToString::RTCRestOutputToString(RTCString *a_pDst, bool a_fAppend /*= false*/) RT_NOEXCEPT
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| 39 | : RTCRestOutputBase()
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| 40 | , m_pDst(a_pDst)
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| 41 | , m_fOutOfMemory(false)
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| 42 | {
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| 43 | if (!a_fAppend)
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| 44 | m_pDst->setNull();
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| 45 | }
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| 46 |
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| 47 |
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| 48 | RTCRestOutputToString::~RTCRestOutputToString()
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| 49 | {
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| 50 | /* We don't own the string, so we don't delete it! */
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| 51 | m_pDst = NULL;
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| 52 | }
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| 53 |
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| 54 |
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| 55 | size_t RTCRestOutputToString::output(const char *a_pchString, size_t a_cchToWrite) RT_NOEXCEPT
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| 56 | {
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| 57 | if (a_cchToWrite)
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| 58 | {
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| 59 | RTCString *pDst = m_pDst;
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| 60 | if (pDst && !m_fOutOfMemory)
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| 61 | {
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| 62 | /*
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| 63 | * Make sure we've got sufficient space available before we append.
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| 64 | */
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| 65 | size_t cchCurrent = pDst->length();
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| 66 | size_t cbCapacity = pDst->capacity();
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| 67 | size_t cbNeeded = cchCurrent + a_cchToWrite + 1;
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| 68 | if (cbNeeded <= cbCapacity)
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| 69 | { /* likely */ }
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| 70 | else
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| 71 | {
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| 72 | /* Grow it. */
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| 73 | if (cbNeeded < _16M)
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| 74 | {
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| 75 | if (cbCapacity <= _1K)
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| 76 | cbCapacity = _1K;
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| 77 | else
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| 78 | cbCapacity = RT_ALIGN_Z(cbCapacity, _1K);
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| 79 | while (cbCapacity < cbNeeded)
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| 80 | cbCapacity <<= 1;
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| 81 | }
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| 82 | else
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| 83 | {
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| 84 | cbCapacity = RT_ALIGN_Z(cbCapacity, _2M);
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| 85 | while (cbCapacity < cbNeeded)
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| 86 | cbCapacity += _2M;
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| 87 | }
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| 88 | int rc = pDst->reserveNoThrow(cbCapacity);
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| 89 | if (RT_SUCCESS(rc))
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| 90 | {
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| 91 | rc = pDst->reserveNoThrow(cbNeeded);
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| 92 | if (RT_FAILURE(rc))
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| 93 | {
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| 94 | m_fOutOfMemory = true;
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| 95 | return a_cchToWrite;
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| 96 | }
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| 97 | }
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| 98 | }
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| 99 |
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| 100 | /*
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| 101 | * Do the appending.
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| 102 | */
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| 103 | pDst->append(a_pchString, a_cchToWrite);
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| 104 | }
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| 105 | }
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| 106 | return a_cchToWrite;
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| 107 | }
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| 108 |
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| 109 |
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| 110 | RTCString *RTCRestOutputToString::finalize() RT_NOEXCEPT
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| 111 | {
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| 112 | RTCString *pRet;
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| 113 | if (!m_fOutOfMemory)
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| 114 | pRet = m_pDst;
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| 115 | else
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| 116 | pRet = NULL;
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| 117 | m_pDst = NULL;
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| 118 | return pRet;
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| 119 | }
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| 120 |
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