1 | /**********************************************************************
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2 | *
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3 | * infodbclass.cpp --
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4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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5 | *
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6 | * A component of the Greenstone digital library software
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7 | * from the New Zealand Digital Library Project at the
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8 | * University of Waikato, New Zealand.
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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 | #include "infodbclass.h"
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27 | #include "unitool.h"
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28 | #include "gsdlunicode.h"
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29 | #include "fileutil.h"
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30 | #include "OIDtools.h"
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31 | #include <stdlib.h>
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32 |
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33 |
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34 |
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35 |
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36 | // constructors
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37 | infodbclass::infodbclass () {
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38 | }
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39 |
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40 | void infodbclass::setinfo (const text_t &key, const text_t &value) {
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41 | text_tarray &tarr = info[key];
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42 | tarr.erase(tarr.begin(), tarr.end());
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43 | tarr.push_back(value);
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44 | }
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45 |
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46 | void infodbclass::setintinfo (const text_t &key, int value) {
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47 | setinfo (key, value);
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48 | }
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49 |
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50 | void infodbclass::setcinfo (const text_t &key, unsigned short c) {
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51 | text_t t;
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52 | t.push_back (c);
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53 | setinfo (key, t);
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54 | }
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55 |
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56 | text_t *infodbclass::getinfo (const text_t &key) {
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57 | iterator here = info.find (key);
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58 | if (here == info.end()) return NULL;
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59 |
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60 | if ((*here).second.empty()) return NULL;
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61 |
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62 | return &((*here).second[0]);
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63 | }
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64 |
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65 | text_t *infodbclass::getinfo (const text_t &key, const text_t& slang) {
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66 | text_tarray *t = getmultinfo(key, slang);
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67 | if (t == NULL || t->empty()) return NULL;
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68 | return &((*t)[0]);
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69 | }
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70 |
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71 | int infodbclass::getintinfo (const text_t &key) {
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72 | text_t *t = getinfo (key);
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73 | if (t == NULL) return 0;
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74 | return t->getint();
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75 | }
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76 |
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77 | int infodbclass::getintinfo (const text_t &key, const text_t& slang) {
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78 | text_tarray *t = getmultinfo(key, slang);
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79 | if (t == NULL || t->empty()) return 0;
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80 | return (*t)[0].getint();
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81 | }
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82 |
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83 | text_t &infodbclass::operator[] (const text_t &key) {
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84 | text_tarray &tarr = info[key];
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85 | if (tarr.empty()) {
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86 | text_t e;
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87 | tarr.push_back(e);
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88 | }
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89 | return tarr[0];
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90 | }
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91 |
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92 |
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93 | void infodbclass::addinfo (const text_t &key, const text_t &value) {
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94 | text_tarray &tarr = info[key];
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95 | tarr.push_back (value);
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96 | }
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97 |
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98 | void infodbclass::addintinfo (const text_t &key, int value) {
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99 | addinfo (key, value);
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100 | }
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101 |
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102 | void infodbclass::addcinfo (const text_t &key, unsigned short c) {
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103 | text_t t;
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104 | t.push_back(c);
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105 | addinfo (key, t);
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106 | }
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107 |
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108 | text_tarray *infodbclass::getmultinfo (const text_t &key) {
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109 | iterator here = info.find (key);
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110 | if (here == info.end()) return NULL;
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111 |
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112 | return &((*here).second);
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113 | }
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114 |
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115 | text_tarray *infodbclass::getmultinfo (const text_t &key, const text_t& slang) {
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116 | iterator here = info.end();
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117 | if (slang.empty()) {
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118 | here = info.find (key);
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119 | }
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120 | else {
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121 | here = info.find (key+":"+slang);
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122 | if (here == info.end()) {
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123 | here = info.find (key);
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124 | }
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125 | }
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126 | if (here == info.end()) return NULL;
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127 |
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128 | return &((*here).second);
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129 | }
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130 |
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131 |
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132 | gdbmclass::~gdbmclass() {
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133 | closedatabase();
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134 | }
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135 |
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136 | // returns true if opened
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137 | bool gdbmclass::opendatabase (const text_t &filename, int mode, int num_retrys,
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138 | #ifdef __WIN32__
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139 | bool need_filelock
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140 | #else
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141 | bool
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142 | #endif
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143 | ) {
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144 | text_t data_location;
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145 | int block_size = 512;
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146 |
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147 | if (gdbmfile != NULL) {
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148 | if (openfile == filename) return true;
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149 | else closedatabase ();
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150 | }
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151 |
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152 | openfile = filename;
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153 |
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154 | char *namebuffer = filename.getcstr();
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155 | do {
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156 | #ifdef __WIN32__
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157 | gdbmfile = gdbm_open (namebuffer, block_size, mode, 00664, NULL, (need_filelock) ? 1 : 0);
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158 | #else
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159 | gdbmfile = gdbm_open (namebuffer, block_size, mode, 00664, NULL);
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160 | #endif
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161 | --num_retrys;
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162 | } while (num_retrys>0 && gdbmfile==NULL &&
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163 | (gdbm_errno==GDBM_CANT_BE_READER || gdbm_errno==GDBM_CANT_BE_WRITER));
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164 | delete []namebuffer;
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165 |
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166 | if (gdbmfile == NULL && logout != NULL) {
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167 | outconvertclass text_t2ascii;
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168 | (*logout) << text_t2ascii << "database open failed on: " << filename << "\n";
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169 | }
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170 |
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171 | return (gdbmfile != NULL);
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172 | }
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173 |
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174 | void gdbmclass::closedatabase () {
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175 | if (gdbmfile == NULL) return;
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176 |
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177 | gdbm_close (gdbmfile);
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178 | gdbmfile = NULL;
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179 | openfile.clear();
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180 | }
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181 |
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182 |
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183 | // returns true on success
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184 | bool gdbmclass::setinfo (const text_t &key, const infodbclass &info) {
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185 | if (gdbmfile == NULL) return false;
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186 |
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187 | text_t subkey;
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188 | text_t data;
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189 |
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190 | // get all the keys and values
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191 | infodbclass::const_iterator info_here = info.begin();
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192 | infodbclass::const_iterator info_end = info.end();
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193 | while (info_here != info_end) {
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194 | // add the key
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195 | subkey.clear();
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196 | subkey.push_back('<');
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197 | text_t::const_iterator subkey_here = (*info_here).first.begin();
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198 | text_t::const_iterator subkey_end = (*info_here).first.end();
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199 | while (subkey_here != subkey_end) {
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200 | if (*subkey_here == '>') {
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201 | subkey.push_back('\\'); subkey.push_back('>');
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202 | } else if (*subkey_here == '\n') {
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203 | subkey.push_back('\\'); subkey.push_back('n');
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204 | } else if (*subkey_here == '\r') {
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205 | subkey.push_back('\\'); subkey.push_back('r');
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206 | } else if (*subkey_here == '\\') {
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207 | subkey.push_back('\\'); subkey.push_back('\\');
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208 | } else {
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209 | subkey.push_back (*subkey_here);
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210 | }
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211 | ++subkey_here;
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212 | }
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213 | subkey.push_back('>');
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214 |
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215 | // add the values
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216 | text_tarray::const_iterator subvalue_here = (*info_here).second.begin();
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217 | text_tarray::const_iterator subvalue_end = (*info_here).second.end();
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218 | while (subvalue_here != subvalue_end) {
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219 | data += subkey;
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220 |
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221 | text_t::const_iterator thissubvalue_here = (*subvalue_here).begin();
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222 | text_t::const_iterator thissubvalue_end = (*subvalue_here).end();
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223 | while (thissubvalue_here != thissubvalue_end) {
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224 | if (*thissubvalue_here == '>') {
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225 | data.push_back('\\'); data.push_back('>');
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226 | } else if (*thissubvalue_here == '\n') {
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227 | data.push_back('\\'); data.push_back('n');
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228 | } else if (*thissubvalue_here == '\r') {
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229 | data.push_back('\\'); data.push_back('r');
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230 | } else if (*thissubvalue_here == '\\') {
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231 | data.push_back('\\'); data.push_back('\\');
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232 | } else {
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233 | data.push_back (*thissubvalue_here);
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234 | }
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235 |
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236 | ++thissubvalue_here;
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237 | }
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238 |
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239 | data.push_back('\n');
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240 | ++subvalue_here;
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241 | }
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242 |
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243 | ++info_here;
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244 | }
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245 |
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246 | // store the value
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247 | datum key_data;
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248 | datum data_data;
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249 |
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250 | // get a utf-8 encoded c string of the unicode key
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251 | key_data.dptr = (to_utf8(key)).getcstr();
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252 | if (key_data.dptr == NULL) {
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253 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
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254 | return false;
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255 | }
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256 | key_data.dsize = strlen (key_data.dptr);
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257 |
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258 | data_data.dptr = (to_utf8(data)).getcstr();
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259 | if (data_data.dptr == NULL) {
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260 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
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261 | delete []key_data.dptr;
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262 | return false;
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263 | }
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264 | data_data.dsize = strlen (data_data.dptr);
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265 |
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266 | int ret = gdbm_store (gdbmfile, key_data, data_data, GDBM_REPLACE);
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267 | delete []key_data.dptr;
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268 | delete []data_data.dptr;
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269 |
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270 | return (ret == 0);
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271 |
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272 | }
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273 |
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274 | //returns true on success
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275 | bool gdbmclass::setinfo (const text_t &key, const text_t &data) {
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276 | if (gdbmfile == NULL) return false;
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277 |
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278 | // store the value
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279 | datum key_data;
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280 | datum data_data;
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281 |
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282 | // get a utf-8 encoded c string of the unicode key
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283 | key_data.dptr = (to_utf8(key)).getcstr();
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284 | if (key_data.dptr == NULL) {
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285 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
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286 | return false;
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287 | }
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288 | key_data.dsize = strlen (key_data.dptr);
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289 |
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290 | data_data.dptr = (to_utf8(data)).getcstr();
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291 | if (data_data.dptr == NULL) {
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292 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
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293 | delete []key_data.dptr;
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294 | return false;
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295 | }
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296 | data_data.dsize = strlen (data_data.dptr);
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297 |
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298 | int ret = gdbm_store (gdbmfile, key_data, data_data, GDBM_REPLACE);
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299 | delete []key_data.dptr;
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300 | delete []data_data.dptr;
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301 |
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302 | return (ret == 0);
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303 |
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304 | }
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305 |
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306 |
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307 | void gdbmclass::deletekey (const text_t &key) {
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308 | if (gdbmfile == NULL) return;
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309 |
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310 | // get a utf-8 encoded c string of the unicode key
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311 | datum key_data;
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312 | key_data.dptr = (to_utf8(key)).getcstr();
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313 | if (key_data.dptr == NULL) return;
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314 | key_data.dsize = strlen (key_data.dptr);
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315 |
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316 | // delete the key
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317 | gdbm_delete (gdbmfile, key_data);
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318 |
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319 | // free up the key memory
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320 | delete []key_data.dptr;
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321 | }
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322 |
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323 |
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324 | // getfirstkey and getnextkey are used for traversing the database
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325 | // no insertions or deletions should be carried out while traversing
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326 | // the database. when there are no keys left to visit in the database
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327 | // an empty string is returned.
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328 | text_t gdbmclass::getfirstkey () {
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329 | if (gdbmfile == NULL) return g_EmptyText;
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330 |
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331 | // get the first key
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332 | datum firstkey_data = gdbm_firstkey (gdbmfile);
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333 | if (firstkey_data.dptr == NULL) return g_EmptyText;
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334 |
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335 | // convert it to text_t
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336 | text_t firstkey;
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337 | firstkey.setcarr (firstkey_data.dptr, firstkey_data.dsize);
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338 | free (firstkey_data.dptr);
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339 | return to_uni(firstkey); // convert to unicode
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340 | }
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341 |
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342 | text_t gdbmclass::getnextkey (const text_t &key) {
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343 | if (gdbmfile == NULL || key.empty()) return g_EmptyText;
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344 |
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345 | // get a utf-8 encoded c string of the unicode key
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346 | datum key_data;
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347 | key_data.dptr = (to_utf8(key)).getcstr();
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348 | if (key_data.dptr == NULL) return g_EmptyText;
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349 | key_data.dsize = strlen (key_data.dptr);
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350 |
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351 | // get the next key
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352 | datum nextkey_data = gdbm_nextkey (gdbmfile, key_data);
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353 | if (nextkey_data.dptr == NULL) {
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354 | delete []key_data.dptr;
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355 | return g_EmptyText;
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356 | }
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357 |
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358 | // convert it to text_t
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359 | text_t nextkey;
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360 | nextkey.setcarr (nextkey_data.dptr, nextkey_data.dsize);
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361 | free (nextkey_data.dptr);
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362 | delete []key_data.dptr;
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363 | return to_uni(nextkey); // convert to unicode
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364 | }
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365 |
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366 |
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367 | // replaces the .fc, .lc, .pr, .rt, .ns and .ps syntax (first child,
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368 | // last child, parent, root, next sibling, previous sibling)
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369 | // it expects child, parent, etc. to exist if syntax has been used
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370 | // so you should test before using
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371 | text_t gdbmclass::translate_OID (const text_t &inOID, infodbclass &info) {
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372 |
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373 | if (inOID.size() < 4) return inOID;
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374 | if (findchar (inOID.begin(), inOID.end(), '.') == inOID.end()) return inOID;
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375 |
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376 | text_t OID = inOID;
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377 | text_tarray tailarray;
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378 | text_t tail = substr (OID.end()-3, OID.end());
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379 | if (tail == ".rt") {
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380 | get_top (inOID, OID);
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381 | return OID;
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382 | }
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383 | while (tail == ".fc" || tail == ".lc" || tail == ".pr" ||
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384 | tail == ".ns" || tail == ".ps") {
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385 | tailarray.push_back(tail);
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386 | OID.erase (OID.end()-3, OID.end());
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387 | tail = substr (OID.end()-3, OID.end());
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388 | if (tail == ".rt") {
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389 | get_top (inOID, OID);
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390 | return OID;
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391 | }
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392 | }
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393 |
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394 | if (tailarray.empty()) return inOID;
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395 | text_tarray::const_iterator begin = tailarray.begin();
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396 | text_tarray::const_iterator here = tailarray.end() - 1;
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397 |
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398 | while (here >= begin) {
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399 |
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400 | if (*here == ".fc")
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401 | get_first_child (OID, info);
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402 | else if (*here == ".lc")
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403 | get_last_child (OID, info);
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404 | else if (*here == ".pr")
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405 | OID = get_parent (OID);
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406 | else if (*here == ".ns")
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407 | get_next_sibling (OID, info);
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408 | else if (*here == ".ps")
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409 | get_previous_sibling (OID, info);
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410 |
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411 | if (here == begin)
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412 | break;
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413 | --here;
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414 | }
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415 | return OID;
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416 | }
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417 |
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418 | void gdbmclass::get_first_child (text_t &OID, infodbclass &info) {
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419 |
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420 | text_t firstchild;
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421 | if (getinfo (OID, info)) {
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422 | text_t &contains = info["contains"];
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423 | if (!contains.empty()) {
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424 | text_t parent = OID;
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425 | getdelimitstr (contains.begin(), contains.end(), ';', firstchild);
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426 | if (firstchild.empty()) OID = contains;
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427 | else OID = firstchild;
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428 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
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429 | }
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430 | }
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431 | }
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432 |
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433 | void gdbmclass::get_last_child (text_t &OID, infodbclass &info) {
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434 |
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435 | text_tarray children;
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436 | if (getinfo (OID, info)) {
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437 | text_t &contains = info["contains"];
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438 | if (!contains.empty()) {
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439 | text_t parent = OID;
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440 | splitchar (contains.begin(), contains.end(), ';', children);
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441 | OID = children.back();
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442 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
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443 | }
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444 | }
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445 | }
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446 |
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447 | void gdbmclass::get_next_sibling (text_t &OID, infodbclass &info) {
|
---|
448 |
|
---|
449 | text_tarray siblings;
|
---|
450 | text_t parent = get_parent (OID);
|
---|
451 |
|
---|
452 | if (getinfo (parent, info)) {
|
---|
453 | text_t &contains = info["contains"];
|
---|
454 | if (!contains.empty()) {
|
---|
455 | splitchar (contains.begin(), contains.end(), ';', siblings);
|
---|
456 | text_tarray::const_iterator here = siblings.begin();
|
---|
457 | text_tarray::const_iterator end = siblings.end();
|
---|
458 | text_t shrunk_OID = OID;
|
---|
459 | shrink_parent (shrunk_OID);
|
---|
460 | while (here != end) {
|
---|
461 | if (*here == shrunk_OID && (here+1 != end)) {
|
---|
462 | OID = *(here+1);
|
---|
463 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
|
---|
464 | break;
|
---|
465 | }
|
---|
466 | ++here;
|
---|
467 | }
|
---|
468 | }
|
---|
469 | }
|
---|
470 | }
|
---|
471 |
|
---|
472 | void gdbmclass::get_previous_sibling (text_t &OID, infodbclass &info) {
|
---|
473 |
|
---|
474 | text_tarray siblings;
|
---|
475 | text_t parent = get_parent (OID);
|
---|
476 |
|
---|
477 | if (getinfo (parent, info)) {
|
---|
478 | text_t &contains = info["contains"];
|
---|
479 | if (!contains.empty()) {
|
---|
480 | splitchar (contains.begin(), contains.end(), ';', siblings);
|
---|
481 | text_tarray::const_iterator here = siblings.begin();
|
---|
482 | text_tarray::const_iterator end = siblings.end();
|
---|
483 | text_t shrunk_OID = OID;
|
---|
484 | shrink_parent (shrunk_OID);
|
---|
485 | while (here != end) {
|
---|
486 | if (*here == shrunk_OID && (here != siblings.begin())) {
|
---|
487 | OID = *(here-1);
|
---|
488 | if (*(OID.begin()) == '"') translate_parent (OID, parent);
|
---|
489 | break;
|
---|
490 | }
|
---|
491 | ++here;
|
---|
492 | }
|
---|
493 | }
|
---|
494 | }
|
---|
495 | }
|
---|
496 |
|
---|
497 | // returns true on success
|
---|
498 | bool gdbmclass::getinfo (const text_t& key, infodbclass &info) {
|
---|
499 | text_t data;
|
---|
500 |
|
---|
501 | if (!getkeydata (key, data)) return false;
|
---|
502 | text_t::iterator here = data.begin ();
|
---|
503 | text_t::iterator end = data.end ();
|
---|
504 |
|
---|
505 | text_t ikey, ivalue;
|
---|
506 | info.clear (); // reset info
|
---|
507 |
|
---|
508 | while (getinfoline (here, end, ikey, ivalue)) {
|
---|
509 | info.addinfo (ikey, ivalue);
|
---|
510 | }
|
---|
511 |
|
---|
512 | return true;
|
---|
513 | }
|
---|
514 |
|
---|
515 | // returns true if exists
|
---|
516 | bool gdbmclass::exists (const text_t& key) {
|
---|
517 | text_t data;
|
---|
518 | return getkeydata (key, data);
|
---|
519 | }
|
---|
520 |
|
---|
521 | // returns true on success
|
---|
522 | bool gdbmclass::getkeydata (const text_t& key, text_t &data) {
|
---|
523 | datum key_data;
|
---|
524 | datum return_data;
|
---|
525 |
|
---|
526 | if (gdbmfile == NULL) return false;
|
---|
527 |
|
---|
528 | // get a utf-8 encoded c string of the unicode key
|
---|
529 | key_data.dptr = (to_utf8(key)).getcstr();
|
---|
530 | if (key_data.dptr == NULL) {
|
---|
531 | if (logout != NULL) (*logout) << "gdbmclass: out of memory\n";
|
---|
532 | return false;
|
---|
533 | }
|
---|
534 | key_data.dsize = strlen (key_data.dptr);
|
---|
535 |
|
---|
536 | // fetch the result
|
---|
537 | return_data = gdbm_fetch (gdbmfile, key_data);
|
---|
538 | delete []key_data.dptr;
|
---|
539 |
|
---|
540 | if (return_data.dptr == NULL) return false;
|
---|
541 |
|
---|
542 | data.setcarr (return_data.dptr, return_data.dsize);
|
---|
543 | free (return_data.dptr);
|
---|
544 | data = to_uni(data); // convert to unicode
|
---|
545 |
|
---|
546 | return true;
|
---|
547 | }
|
---|
548 |
|
---|
549 | // returns true on success
|
---|
550 | bool gdbmclass::getinfoline (text_t::iterator &here, text_t::iterator end,
|
---|
551 | text_t &key, text_t &value) {
|
---|
552 | key.clear();
|
---|
553 | value.clear();
|
---|
554 |
|
---|
555 | // ignore white space
|
---|
556 | while (here != end && is_unicode_space (*here)) ++here;
|
---|
557 |
|
---|
558 | // get the '<'
|
---|
559 | if (here == end || *here != '<') return false;
|
---|
560 | ++here;
|
---|
561 |
|
---|
562 | // get the key
|
---|
563 | while (here != end && *here != '>') {
|
---|
564 | key.push_back(*here);
|
---|
565 | ++here;
|
---|
566 | }
|
---|
567 |
|
---|
568 | // get the '>'
|
---|
569 | if (here == end || *here != '>') return false;
|
---|
570 | ++here;
|
---|
571 |
|
---|
572 | // get the value
|
---|
573 | while (here != end && *here != '\n') {
|
---|
574 | if (*here == '\\') {
|
---|
575 | // found escape character
|
---|
576 | ++here;
|
---|
577 | if (here != end) {
|
---|
578 | if (*here == 'n') value.push_back ('\n');
|
---|
579 | else if (*here == 'r') value.push_back ('\r');
|
---|
580 | else value.push_back(*here);
|
---|
581 | }
|
---|
582 |
|
---|
583 | } else {
|
---|
584 | // a normal character
|
---|
585 | value.push_back(*here);
|
---|
586 | }
|
---|
587 |
|
---|
588 | ++here;
|
---|
589 | }
|
---|
590 |
|
---|
591 | return true;
|
---|
592 | }
|
---|