1 | /* $Id: RTCRestOutputToString.cpp 93115 2022-01-01 11:31:46Z 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) 2018-2022 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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