Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/tesseract/src/viewer/svutil.cpp @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
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2
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1 ///////////////////////////////////////////////////////////////////////
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2 // File: svutil.cpp
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3 // Description: ScrollView Utilities
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4 // Author: Joern Wanke
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5 //
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6 // (C) Copyright 2007, Google Inc.
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7 // Licensed under the Apache License, Version 2.0 (the "License");
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8 // you may not use this file except in compliance with the License.
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9 // You may obtain a copy of the License at
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10 // http://www.apache.org/licenses/LICENSE-2.0
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11 // Unless required by applicable law or agreed to in writing, software
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12 // distributed under the License is distributed on an "AS IS" BASIS,
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13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 // See the License for the specific language governing permissions and
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15 // limitations under the License.
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16 //
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17 ///////////////////////////////////////////////////////////////////////
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18 //
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19 // SVUtil contains the SVSync and SVNetwork classes, which are used for
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20 // thread/process creation & synchronization and network connection.
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21
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22 // Include automatically generated configuration file if running autoconf.
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23 #ifdef HAVE_CONFIG_H
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24 # include "config_auto.h"
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25 #endif
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27 #include "svutil.h"
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28
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29 #include <cstdio>
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30 #include <cstdlib>
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31 #include <cstring>
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32 #include <iostream>
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33 #include <memory>
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34 #include <string>
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35 #include <thread> // for std::this_thread
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36 #include <vector>
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37
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38 #ifdef _WIN32
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39 # pragma comment(lib, "Ws2_32.lib")
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40 # include <winsock2.h> // for fd_set, send, ..
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41 # include <ws2tcpip.h> // for addrinfo
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42 #else
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43 # include <arpa/inet.h>
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44 # include <netdb.h>
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45 # include <netinet/in.h>
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46 # include <semaphore.h>
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47 # include <sys/select.h>
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48 # include <sys/socket.h>
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49 # include <csignal>
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50 # ifdef __linux__
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51 # include <sys/prctl.h>
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52 # endif
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53 # include <unistd.h>
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54 #endif
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55
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56 #if defined(_WIN32) && !defined(__GNUC__)
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57 # define strtok_r(str, delim, saveptr) strtok_s(str, delim, saveptr)
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58 #endif /* _WIN32 && !__GNUC__ */
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59
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60 #ifndef GRAPHICS_DISABLED
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61
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62 namespace tesseract {
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63
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64 const int kMaxMsgSize = 4096;
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65
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66 // Starts a new process.
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67 void SVSync::StartProcess(const char *executable, const char *args) {
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68 std::string proc;
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69 proc.append(executable);
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70 proc.append(" ");
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71 proc.append(args);
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72 std::cout << "Starting " << proc << std::endl;
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73 # ifdef _WIN32
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74 STARTUPINFO start_info;
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75 PROCESS_INFORMATION proc_info;
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76 GetStartupInfo(&start_info);
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77 if (!CreateProcess(nullptr, const_cast<char *>(proc.c_str()), nullptr,
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78 nullptr, FALSE, CREATE_NO_WINDOW | DETACHED_PROCESS,
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79 nullptr, nullptr, &start_info, &proc_info))
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80 return;
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81 # else
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82 int pid = fork();
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83 if (pid != 0) { // The father process returns
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84 } else {
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85 # ifdef __linux__
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86 // Make sure the java process terminates on exit, since its
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87 // broken socket detection seems to be useless.
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88 prctl(PR_SET_PDEATHSIG, 2, 0, 0, 0);
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89 # endif
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90 std::string mutable_args(args);
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91 int argc = 1;
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92 for (auto ch : mutable_args) {
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93 if (ch == ' ') {
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94 ++argc;
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95 }
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96 }
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97 std::unique_ptr<char *[]> argv(new char *[argc + 2]);
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98 std::string argv0(executable);
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99 argv[0] = &argv0[0];
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100 argv[1] = &mutable_args[0];
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101 argc = 2;
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diff changeset
102 bool inquote = false;
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diff changeset
103 for (int i = 0; mutable_args[i]; ++i) {
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104 if (!inquote && mutable_args[i] == ' ') {
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diff changeset
105 mutable_args[i] = '\0';
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diff changeset
106 argv[argc++] = &mutable_args[i + 1];
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diff changeset
107 } else if (mutable_args[i] == '"') {
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diff changeset
108 inquote = !inquote;
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diff changeset
109 mutable_args[i] = ' ';
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110 }
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111 }
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diff changeset
112 argv[argc] = nullptr;
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diff changeset
113 execvp(executable, argv.get());
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114 }
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115 # endif
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116 }
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117
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diff changeset
118 SVSemaphore::SVSemaphore() {
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119 # ifdef _WIN32
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120 semaphore_ = CreateSemaphore(0, 0, 10, 0);
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121 # elif defined(__APPLE__)
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122 auto name = std::to_string(random());
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diff changeset
123 sem_unlink(name.c_str());
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124 semaphore_ = sem_open(name.c_str(), O_CREAT, S_IWUSR, 0);
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diff changeset
125 if (semaphore_ == SEM_FAILED) {
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126 perror("sem_open");
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127 }
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128 # else
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129 sem_init(&semaphore_, 0, 0);
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130 # endif
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131 }
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132
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133 SVSemaphore::~SVSemaphore() {
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134 # ifdef _WIN32
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135 CloseHandle(semaphore_);
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diff changeset
136 # elif defined(__APPLE__)
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137 sem_close(semaphore_);
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138 # else
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diff changeset
139 sem_close(&semaphore_);
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140 # endif
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141 }
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142
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143 void SVSemaphore::Signal() {
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144 # ifdef _WIN32
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145 ReleaseSemaphore(semaphore_, 1, nullptr);
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146 # elif defined(__APPLE__)
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147 sem_post(semaphore_);
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148 # else
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149 sem_post(&semaphore_);
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150 # endif
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151 }
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152
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153 void SVSemaphore::Wait() {
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154 # ifdef _WIN32
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diff changeset
155 WaitForSingleObject(semaphore_, INFINITE);
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diff changeset
156 # elif defined(__APPLE__)
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diff changeset
157 sem_wait(semaphore_);
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158 # else
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diff changeset
159 sem_wait(&semaphore_);
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diff changeset
160 # endif
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161 }
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diff changeset
162
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diff changeset
163 // Place a message in the message buffer (and flush it).
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diff changeset
164 void SVNetwork::Send(const char *msg) {
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diff changeset
165 std::lock_guard<std::mutex> guard(mutex_send_);
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diff changeset
166 msg_buffer_out_.append(msg);
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167 }
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diff changeset
168
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diff changeset
169 // Send the whole buffer.
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diff changeset
170 void SVNetwork::Flush() {
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diff changeset
171 std::lock_guard<std::mutex> guard(mutex_send_);
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diff changeset
172 while (!msg_buffer_out_.empty()) {
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diff changeset
173 int i = send(stream_, msg_buffer_out_.c_str(), msg_buffer_out_.length(), 0);
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diff changeset
174 msg_buffer_out_.erase(0, i);
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175 }
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diff changeset
176 }
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diff changeset
177
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diff changeset
178 // Receive a message from the server.
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diff changeset
179 // This will always return one line of char* (denoted by \n).
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diff changeset
180 char *SVNetwork::Receive() {
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diff changeset
181 char *result = nullptr;
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diff changeset
182 if (buffer_ptr_ != nullptr) {
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diff changeset
183 result = strtok_r(nullptr, "\n", &buffer_ptr_);
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184 }
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diff changeset
185
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diff changeset
186 // This means there is something left in the buffer and we return it.
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diff changeset
187 if (result != nullptr) {
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diff changeset
188 return result;
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diff changeset
189 // Otherwise, we read from the stream_.
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diff changeset
190 } else {
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diff changeset
191 buffer_ptr_ = nullptr;
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diff changeset
192
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diff changeset
193 // The timeout length is not really important since we are looping anyway
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diff changeset
194 // until a new message is delivered.
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diff changeset
195 struct timeval tv;
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diff changeset
196 tv.tv_sec = 10;
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diff changeset
197 tv.tv_usec = 0;
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diff changeset
198
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diff changeset
199 // Set the flags to return when the stream_ is ready to be read.
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parents:
diff changeset
200 fd_set readfds;
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diff changeset
201 FD_ZERO(&readfds);
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parents:
diff changeset
202 FD_SET(stream_, &readfds);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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203
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parents:
diff changeset
204 int i = select(stream_ + 1, &readfds, nullptr, nullptr, &tv);
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205
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diff changeset
206 // The stream_ died.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
207 if (i == 0) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
208 return nullptr;
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Franz Glasner <fzglas.hg@dom66.de>
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209 }
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210
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parents:
diff changeset
211 // Read the message buffer.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
212 i = recv(stream_, msg_buffer_in_, kMaxMsgSize, 0);
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213
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parents:
diff changeset
214 // Server quit (0) or error (-1).
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
215 if (i <= 0) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
216 return nullptr;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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217 }
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diff changeset
218 msg_buffer_in_[i] = '\0';
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
219 // Setup a new string tokenizer.
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diff changeset
220 return strtok_r(msg_buffer_in_, "\n", &buffer_ptr_);
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221 }
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222 }
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223
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parents:
diff changeset
224 // Close the connection to the server.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
225 void SVNetwork::Close() {
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parents:
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226 # ifdef _WIN32
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diff changeset
227 closesocket(stream_);
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228 # else
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
229 close(stream_);
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
230 # endif
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parents:
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231 // Mark stream_ as invalid.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
232 stream_ = -1;
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233 }
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parents:
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234
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parents:
diff changeset
235 // The program to invoke to start ScrollView
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
236 static const char *ScrollViewProg() {
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parents:
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237 # ifdef _WIN32
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parents:
diff changeset
238 const char *prog = "java -Xms512m -Xmx1024m";
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
239 # else
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
240 const char *prog = "sh";
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
241 # endif
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
242 return prog;
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parents:
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243 }
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parents:
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244
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parents:
diff changeset
245 // The arguments to the program to invoke to start ScrollView
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
246 static std::string ScrollViewCommand(const std::string &scrollview_path) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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247 // Quote our paths on Windows to deal with spaces
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
248 # ifdef _WIN32
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
249 const char cmd_template[] =
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
250 "-Djava.library.path=\"%s\" -jar \"%s/ScrollView.jar\"";
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
251 # else
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parents:
diff changeset
252 const char cmd_template[] =
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parents:
diff changeset
253 "-c \"trap 'kill %%1' 0 1 2 ; java "
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
254 "-Xms1024m -Xmx2048m -jar %s/ScrollView.jar"
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 " & wait\"";
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parents:
diff changeset
256 # endif
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Franz Glasner <fzglas.hg@dom66.de>
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diff changeset
257 size_t cmdlen = sizeof(cmd_template) + 2 * scrollview_path.size() + 1;
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parents:
diff changeset
258 std::vector<char> cmd(cmdlen);
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parents:
diff changeset
259 const char *sv_path = scrollview_path.c_str();
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parents:
diff changeset
260 # ifdef _WIN32
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parents:
diff changeset
261 snprintf(&cmd[0], cmdlen, cmd_template, sv_path, sv_path);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
262 # else
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parents:
diff changeset
263 snprintf(&cmd[0], cmdlen, cmd_template, sv_path);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264 # endif
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parents:
diff changeset
265 std::string command(&cmd[0]);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
266 return command;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
267 }
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parents:
diff changeset
268
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parents:
diff changeset
269 // Set up a connection to a ScrollView on hostname:port.
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parents:
diff changeset
270 SVNetwork::SVNetwork(const char *hostname, int port) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
271 msg_buffer_in_ = new char[kMaxMsgSize + 1];
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
272 msg_buffer_in_[0] = '\0';
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parents:
diff changeset
273
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parents:
diff changeset
274 buffer_ptr_ = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
275
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
276 auto port_string = std::to_string(port);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
277 # ifdef _WIN32
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
278 // Initialize Winsock
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
279 WSADATA wsaData;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
280 int iResult = WSAStartup(MAKEWORD(2, 2), &wsaData);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
281 if (iResult != 0) {
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
282 std::cerr << "WSAStartup failed: " << iResult << std::endl;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
283 }
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
284 # endif // _WIN32
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parents:
diff changeset
285
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parents:
diff changeset
286 struct addrinfo *addr_info = nullptr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
287 struct addrinfo hints = {};
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
288 hints.ai_family = AF_INET;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
289 hints.ai_socktype = SOCK_STREAM;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
290 if (getaddrinfo(hostname, port_string.c_str(), &hints, &addr_info) != 0) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
291 std::cerr << "Error resolving name for ScrollView host "
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
292 << std::string(hostname) << ":" << port << std::endl;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
293 # ifdef _WIN32
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
294 WSACleanup();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
295 # endif // _WIN32
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
296 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
297
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
298 if (addr_info == nullptr) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
299 // Mark stream_ as invalid.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
300 stream_ = -1;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
301 } else {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
302 stream_ = socket(addr_info->ai_family, addr_info->ai_socktype,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
303 addr_info->ai_protocol);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
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304 }
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305
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306 if (stream_ < 0) {
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307 std::cerr << "Failed to open socket" << std::endl;
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308 } else if (connect(stream_, addr_info->ai_addr, addr_info->ai_addrlen) < 0) {
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309 // If server is not there, we will start a new server as local child
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310 // process.
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311 const char *scrollview_path = getenv("SCROLLVIEW_PATH");
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312 if (scrollview_path == nullptr) {
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313 # ifdef SCROLLVIEW_PATH
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314 # define _STR(a) # a
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315 # define _XSTR(a) _STR(a)
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316 scrollview_path = _XSTR(SCROLLVIEW_PATH);
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317 # undef _XSTR
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318 # undef _STR
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319 # else
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320 scrollview_path = ".";
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321 # endif
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322 }
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323 const char *prog = ScrollViewProg();
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324 std::string command = ScrollViewCommand(scrollview_path);
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325 SVSync::StartProcess(prog, command.c_str());
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326
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327 // Wait for server to show up.
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328 // Note: There is no exception handling in case the server never turns up.
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329
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330 Close();
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331 for (;;) {
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332 stream_ = socket(addr_info->ai_family, addr_info->ai_socktype,
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333 addr_info->ai_protocol);
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334 if (stream_ >= 0) {
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335 if (connect(stream_, addr_info->ai_addr, addr_info->ai_addrlen) == 0) {
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336 break;
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337 }
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338
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339 Close();
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340
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341 std::cout << "ScrollView: Waiting for server...\n";
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342 std::this_thread::sleep_for(std::chrono::seconds(1));
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343 }
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344 }
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345 }
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346 # ifdef _WIN32
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347 // WSACleanup(); // This cause ScrollView windows is not displayed
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348 # endif // _WIN32
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349 freeaddrinfo(addr_info);
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350 }
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351
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352 SVNetwork::~SVNetwork() {
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353 Close();
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354 delete[] msg_buffer_in_;
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355 }
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356
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357 } // namespace tesseract
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358
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359 #endif // !GRAPHICS_DISABLED