1 | /**********************************************************************
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2 | *
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3 | * txt2db.cpp --
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4 | * A component of the Greenstone digital library software
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5 | * from the New Zealand Digital Library Project at the
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6 | * University of Waikato, New Zealand.
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7 | *
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8 | * Copyright (C) 1999 The New Zealand Digital Library Project
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9 | *
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10 | * This program is free software; you can redistribute it and/or modify
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11 | * it under the terms of the GNU General Public License as published by
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12 | * the Free Software Foundation; either version 2 of the License, or
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13 | * (at your option) any later version.
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14 | *
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15 | * This program is distributed in the hope that it will be useful,
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16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | * GNU General Public License for more details.
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19 | *
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20 | * You should have received a copy of the GNU General Public License
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21 | * along with this program; if not, write to the Free Software
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22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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23 | *
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24 | **********************************************************************/
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25 |
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26 |
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27 | #ifdef __WIN32__
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28 | #include "autoconf.h"
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29 | #include "systems.h"
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30 | #include "gdbmconst.h"
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31 | #include "gdbm.h"
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32 |
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33 | #else
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34 | #include <gdbm.h>
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35 | #endif
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36 |
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37 | //#include "gsdlconf.h"
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38 | #include "text_t.h"
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39 | #include <stdlib.h>
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40 | #include <cstring>
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41 | #include <fcntl.h>
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42 | #include <string.h>
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43 | #include <sys/stat.h>
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44 |
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45 | #if defined(GSDL_USE_OBJECTSPACE)
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46 | # include <ospace\std\iostream>
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47 | #elif defined(GSDL_USE_IOS_H)
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48 | # include <iostream.h>
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49 | #else
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50 | # include <iostream>
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51 | #endif
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52 |
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53 | using namespace std;
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54 |
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55 | void print_usage (char *program_name) {
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56 | cerr << "usage: " << program_name << " database-name" << endl;
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57 | cerr << "usage: " << program_name << " -update database-name" << endl;
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58 | cerr << "usage: " << program_name << " -append database-name" << endl << endl;
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59 | cerr << "options:" << endl;
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60 | cerr << " -update update existing database" << endl;
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61 | cerr << " -append legacy alias for -update" << endl << endl;
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62 | }
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63 |
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64 | // lock a file on linux
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65 | // [hs, 2 july 2010]
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66 | // - modified to create a locl file local to the collection [jmt12]
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67 | int lock ()
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68 | {
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69 | string file_path ("");
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70 | char *collect_dir = getenv ("GSDLCOLLECTDIR");
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71 | if (collect_dir != NULL)
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72 | {
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73 | file_path += collect_dir;
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74 | }
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75 | file_path += "/tmp";
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76 | if ( access( file_path.c_str(), 00 ) != 0 )
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77 | {
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78 | mkdir(file_path.c_str(), 00777);
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79 | }
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80 | file_path += "/gdb.lock";
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81 | ///out << "txt2dbl::lock(" << file_path << ") => ";
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82 | int fd2 = open (file_path.c_str(), O_CREAT|O_RDWR, 00644);
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83 | close (fd2);
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84 | int fd = open (file_path.c_str(), O_RDWR);
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85 | flock lock = {F_WRLCK, SEEK_SET, 0, 0, 0};
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86 | fcntl (fd, F_SETLKW, &lock);
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87 | ///out << "locked!" << endl;
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88 | return fd;
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89 | }
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90 |
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91 | // unlock a file on linux
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92 | // [hs, 2 july 2010]
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93 | int unlock ( int fd )
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94 | {
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95 | ///out << "txt2dbl::unlock() => ";
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96 | flock lock1 = {F_UNLCK, SEEK_SET, 0, 0, 0};
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97 | fcntl (fd, F_SETLKW, &lock1);
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98 | ///out << "unlocked!" << endl;
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99 | return 0;
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100 | }
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101 |
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102 | int main (int argc, char *argv[]) {
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103 |
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104 | ///out << "===== TXT2DB+Locking=====" << endl;
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105 |
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106 | int block_size = 0;
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107 | GDBM_FILE dbf;
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108 | char c;
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109 | text_t key;
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110 | text_t value;
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111 | text_t tmp;
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112 | int num_dashes = 0;
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113 |
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114 | // sanity check
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115 | if (argc != 2 && argc != 3) {
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116 | print_usage (argv[0]);
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117 | exit (0);
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118 | }
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119 |
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120 | char *dbname;
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121 | int update = 0;
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122 | int delkey = 0;
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123 | int switched_flags = 0;
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124 |
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125 | if (argc == 3) {
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126 | // legacy support
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127 | if (strcmp (argv[1], "-append") == 0) {
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128 | update = 1;
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129 | dbname = argv[2];
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130 | } else if (strcmp (argv[1], "-update") == 0) {
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131 | update = 1;
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132 | dbname = argv[2];
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133 | } else {
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134 | cerr << argv[1] << " is not a valid option." << endl << endl;
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135 | print_usage (argv[0]);
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136 | exit (0);
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137 | }
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138 | } else dbname = argv[1];
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139 |
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140 |
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141 | // open the database
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142 | // note that GDBM_FAST is obsolete on newer versions of gdbm
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143 | int read_write = GDBM_NEWDB | GDBM_FAST;
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144 | if (update) read_write = GDBM_WRCREAT | GDBM_FAST;
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145 |
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146 | /*
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147 | #ifdef __WIN32__
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148 | dbf = gdbm_open (dbname, block_size, read_write, 00664, NULL, 1);
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149 | #else
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150 | dbf = gdbm_open (dbname, block_size, read_write, 00664, NULL);
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151 | #endif
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152 | if (dbf == NULL) {
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153 | cerr << "couldn't create " << dbname << endl;
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154 | exit (0);
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155 | }
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156 | */
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157 |
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158 | cin.get(c);
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159 | while (!cin.eof()) {
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160 | num_dashes = 0;
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161 | key = "";
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162 | value = "";
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163 |
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164 | // Parse out 'key' from [key]\n
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165 |
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166 | // scan for first occurrence of [
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167 | while (!cin.eof() && c != '[') cin.get(c);
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168 |
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169 | if (!cin.eof()) cin.get(c); // skip [
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170 |
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171 | // now look for closing ], building up 'key' as we go
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172 | while (!cin.eof() && c != ']') {
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173 | key.push_back ((unsigned char)c);
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174 | cin.get(c);
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175 | }
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176 |
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177 | if (!cin.eof()) {
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178 | // most likely an eol char, but if '-', then signifies record
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179 | // is to be deleted, not added
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180 | cin.get(c);
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181 | if (c == '-') {
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182 | delkey = 1;
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183 | }
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184 | else {
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185 | delkey = 0;
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186 | }
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187 | }
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188 | while (!cin.eof() && (c == '\n' || c == '\r')) cin.get(c);
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189 |
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190 | // look for 70 dashes
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191 | tmp = "";
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192 | while (!cin.eof() && (num_dashes < 70)) {
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193 | if (c == '\n') {
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194 | tmp.push_back ((unsigned char)c);
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195 | num_dashes = 0;
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196 |
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197 | } else if (c == '\r') {
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198 | // Here we are able to process both Windows-specific text files
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199 | // (containing carriage-return, newline) and Linux text files
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200 | // (containing only newline characters) by ignoring the Windows'
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201 | // carriage-return altogether so that we produce a uniform database
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202 | // file from either system's type of text file.
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203 | // If we don't ignore the carriage return here, txt.gz files
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204 | // produced on Windows cause a GS library running on Linux to break.
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205 | num_dashes = 0;
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206 |
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207 | } else if (c == '-') {
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208 | tmp.push_back ((unsigned char)c);
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209 | ++num_dashes;
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210 |
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211 | } else {
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212 | value += tmp;
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213 | value.push_back ((unsigned char)c);
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214 | tmp = "";
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215 | num_dashes = 0;
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216 | }
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217 | cin.get(c);
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218 | }
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219 |
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220 | // if the key is not an empty string store this key-value pair
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221 | if (!key.empty()) {
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222 | // convert key to a datum datatype
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223 | datum key_data;
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224 | key_data.dptr = key.getcstr();
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225 | if (key_data.dptr == NULL) {
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226 | cerr << "NULL key_data.dptr" << endl;
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227 | exit (0);
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228 | }
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229 | key_data.dsize = strlen(key_data.dptr);
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230 | // moved for better localisation at the expense of some speed
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231 | // and lock before the operation
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232 | // [hs, 2 july 2010]
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233 | int thelock = lock ();
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234 | #ifdef __WIN32__
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235 | dbf = gdbm_open (dbname, block_size, read_write, 00664, NULL, 1);
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236 | #else
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237 | dbf = gdbm_open (dbname, block_size, read_write, 00664, NULL);
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238 | #endif
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239 | if (dbf == NULL) {
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240 | cerr << "couldn't create " << dbname << endl;
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241 | exit (0);
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242 | }
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243 | // If opening was successful the first time, and regardless of what flags
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244 | // we may have been given, we must make future opens '-update' (rather
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245 | // than erase the file over and over!)
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246 | if (!update && !switched_flags)
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247 | {
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248 | read_write = GDBM_WRCREAT | GDBM_FAST;
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249 | switched_flags = 1;
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250 | }
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251 |
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252 | if (delkey) {
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253 | // delete the given key
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254 | if (gdbm_delete(dbf, key_data) < 0) {
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255 | cerr << "gdbm_delete returned an error" << endl;
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256 | }
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257 | }
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258 | else {
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259 |
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260 | // add/update
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261 |
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262 | // convert value to a datum datatype
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263 | datum value_data;
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264 | value_data.dptr = value.getcstr();
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265 | if (value_data.dptr == NULL) {
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266 | cerr << "NULL value_data.dptr" << endl;
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267 | exit (0);
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268 | }
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269 | value_data.dsize = strlen(value_data.dptr);
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270 |
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271 | // store the value
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272 | if (gdbm_store (dbf, key_data, value_data, GDBM_REPLACE) < 0) {
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273 | cerr << "gdbm_store returned an error" << endl;
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274 | exit (0);
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275 | }
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276 |
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277 | free(value_data.dptr);
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278 | }
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279 |
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280 | // moved for better localisation at the expense of some speed
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281 | // and unlock after the operation
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282 | // [hs, 2 july 2010]
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283 | gdbm_close (dbf);
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284 | unlock (thelock);
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285 |
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286 | free(key_data.dptr);
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287 | }
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288 | }
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289 | /* gdbm_close (dbf); */
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290 |
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291 | return 0;
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292 | }
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