annotate OrthancFramework/Sources/FileBuffer.cpp @ 4437:d9473bd5ed43

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Wed, 06 Jan 2021 17:27:28 +0100
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children 7053502fbf97
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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22
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23 #include "PrecompiledHeaders.h"
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24 #include "FileBuffer.h"
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25
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26 #include "TemporaryFile.h"
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27 #include "OrthancException.h"
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28
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29 #include <boost/filesystem/fstream.hpp>
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30
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31
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32 namespace Orthanc
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33 {
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34 class FileBuffer::PImpl
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35 {
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36 private:
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37 TemporaryFile file_;
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38 boost::filesystem::ofstream stream_;
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39 bool isWriting_;
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40
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41 public:
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42 PImpl() :
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43 isWriting_(true)
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44 {
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45 stream_.open(file_.GetPath(), std::ofstream::out | std::ofstream::binary);
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46 if (!stream_.good())
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47 {
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48 throw OrthancException(ErrorCode_CannotWriteFile);
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49 }
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50 }
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51
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52 ~PImpl()
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53 {
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54 if (isWriting_)
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55 {
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56 stream_.close();
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57 }
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58 }
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59
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60 void Append(const char* buffer,
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61 size_t size)
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62 {
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63 if (!isWriting_)
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64 {
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65 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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66 }
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67
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68 if (size > 0)
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69 {
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70 stream_.write(buffer, size);
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71 if (!stream_.good())
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72 {
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73 stream_.close();
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74 throw OrthancException(ErrorCode_FileStorageCannotWrite);
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75 }
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76 }
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77 }
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78
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79 void Read(std::string& target)
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80 {
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81 if (isWriting_)
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82 {
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83 stream_.close();
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84 isWriting_ = false;
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85 }
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86
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87 file_.Read(target);
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88 }
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89 };
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90
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91
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92 FileBuffer::FileBuffer() :
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93 pimpl_(new PImpl)
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94 {
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95 }
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96
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97
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98 void FileBuffer::Append(const char* buffer,
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99 size_t size)
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100 {
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101 assert(pimpl_.get() != NULL);
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102 pimpl_->Append(buffer, size);
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103 }
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104
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105
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106 void FileBuffer::Read(std::string& target)
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107 {
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108 assert(pimpl_.get() != NULL);
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109 pimpl_->Read(target);
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110 }
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111 }