1 | /**********************************************************************
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2 | *
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3 | * text_t.cpp -- a simple 16-bit character string class
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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 | * $Id: text_t.cpp 534 1999-09-07 04:57:43Z sjboddie $
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25 | *
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26 | *********************************************************************/
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27 |
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28 | /*
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29 | $Log$
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30 | Revision 1.13 1999/09/07 04:57:43 sjboddie
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31 | added gpl notice
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32 |
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33 | Revision 1.12 1999/08/31 08:04:41 rjmcnab
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34 | Fixed a small but hard to find bug in getcarr
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35 |
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36 | Revision 1.11 1999/07/01 04:05:09 rjmcnab
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37 | Optimised append functions slightly and added a reserve function.
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38 |
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39 | Revision 1.10 1999/04/26 03:58:03 sjboddie
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40 | added is_number function
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41 |
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42 | Revision 1.9 1999/04/06 22:17:24 rjmcnab
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43 | Added splits and joins using text_tset.
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44 |
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45 | Revision 1.8 1999/02/28 23:14:41 rjmcnab
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46 |
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47 | Added uc and lc to convert to uppercase and lowercase.
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48 |
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49 | Revision 1.7 1999/02/21 22:26:39 rjmcnab
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50 |
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51 | Made getint() a constant function.
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52 |
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53 | Revision 1.6 1999/02/03 01:13:26 sjboddie
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54 |
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55 | Got interface to handle subcollections and language subcollections -
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56 | committed changes made to some of the collections
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57 |
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58 | Revision 1.5 1999/01/19 01:38:14 rjmcnab
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59 |
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60 | Made the source more portable.
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61 |
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62 | Revision 1.4 1999/01/12 01:51:00 rjmcnab
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63 |
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64 | Standard header.
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65 |
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66 | Revision 1.3 1999/01/08 02:33:16 rjmcnab
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67 |
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68 | Added standard header to source files.
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69 |
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70 | */
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71 |
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72 |
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73 | #include "text_t.h"
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74 |
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75 | #if defined(GSDL_USE_OBJECTSPACE)
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76 | # include <ospace\std\algorithm>
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77 | #elif defined(GSDL_USE_STL_H)
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78 | # if defined(GSDL_USE_ALGO_H)
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79 | # include <algo.h>
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80 | # else
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81 | # include <algorithm.h>
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82 | # endif
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83 | #else
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84 | # include <algorithm>
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85 | #endif
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86 |
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87 |
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88 | #include "unitool.h"
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89 |
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90 | ////////////////////////////////////
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91 | // text_t methods
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92 | ////////////////////////////////////
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93 |
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94 | text_t::text_t ()
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95 | {
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96 | setencoding(0);
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97 | clear ();
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98 | }
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99 |
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100 | text_t::text_t (int i)
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101 | {
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102 | setencoding(0);
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103 | clear ();
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104 | appendint (i);
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105 | }
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106 |
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107 | text_t::text_t (char *s)
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108 | {
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109 | setencoding(0);
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110 | clear ();
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111 | appendcstr (s);
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112 | }
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113 |
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114 | void text_t::append (const text_t &t)
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115 | {
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116 | text.insert(text.end(), t.begin(), t.end());
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117 | // const_iterator here, end=t.end();
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118 | // for (here=t.begin(); here!=end;here++)
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119 | // {
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120 | // text.push_back(*here);
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121 | // }
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122 | }
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123 |
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124 | void text_t::appendrange (iterator first, iterator last)
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125 | {
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126 | text.insert(text.end(), first, last);
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127 | // while (first != last)
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128 | // {
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129 | // text.push_back (*first);
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130 | // first++;
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131 | // }
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132 | }
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133 |
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134 | void text_t::appendrange (const_iterator first, const_iterator last)
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135 | {
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136 | text.insert(text.end(), first, last);
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137 | // while (first != last)
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138 | // {
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139 | // text.push_back (*first);
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140 | // first++;
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141 | // }
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142 | }
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143 |
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144 | void text_t::appendint (int i)
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145 | {
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146 | // deal with zeros and negatives
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147 | if (i == 0)
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148 | {
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149 | text.push_back('0');
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150 | return;
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151 | }
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152 | else if (i < 0)
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153 | {
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154 | text.push_back('-');
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155 | i *= -1;
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156 | }
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157 |
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158 | // get a buffer for the conversion
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159 | int maxbuflen = sizeof(int)*3;
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160 | char *buf = new char[maxbuflen];
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161 | int len = 0;
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162 |
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163 | // get the number in reverse
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164 | while (i > 0)
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165 | {
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166 | buf[len++] = '0'+ (i%10);
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167 | i = i/10;
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168 | }
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169 |
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170 | // reverse the number
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171 | while (len > 0)
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172 | {
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173 | text.push_back(buf[--len]);
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174 | }
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175 |
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176 | delete buf;
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177 | }
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178 |
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179 | int text_t::getint () const
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180 | {
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181 | int i = 0;
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182 | int mult = 1; // become -1 for negative numbers
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183 |
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184 | const_iterator here = text.begin();
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185 | const_iterator end = text.end();
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186 |
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187 | // do plus and minus signs
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188 | if (here != end)
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189 | {
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190 | if (*here == '-')
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191 | {
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192 | mult = -1;
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193 | here++;
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194 | }
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195 | else if (*here == '+')
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196 | {
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197 | mult = 1;
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198 | here++;
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199 | }
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200 | }
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201 |
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202 | // deal with the number
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203 | while ((here != end) && (*here >= '0') && (*here <= '9'))
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204 | {
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205 | i = 10*i + (*here - '0');
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206 | here++;
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207 | }
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208 |
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209 | i *= mult;
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210 | return i;
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211 | }
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212 |
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213 |
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214 |
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215 | void text_t::appendcarr (char *s, size_type len)
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216 | {
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217 | unsigned char *us = (unsigned char *)s;
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218 | while (len > 0)
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219 | {
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220 | text.push_back (*us); // append this character
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221 | us++;
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222 | len--;
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223 | }
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224 | }
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225 |
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226 | void text_t::appendcstr (char *s)
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227 | {
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228 | unsigned char *us = (unsigned char *)s;
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229 | while (*us != '\0')
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230 | {
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231 | text.push_back (*us); // append this character
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232 | us++;
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233 | }
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234 | }
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235 |
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236 |
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237 | // strings returned from getcarr and getcstr become the callers
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238 | // responsibility and should be deallocated with "delete"
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239 |
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240 | char *text_t::getcarr(size_type &len) const
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241 | {
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242 | unsigned char *cstr = new unsigned char[size()];
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243 | len = 0;
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244 |
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245 | const_iterator ithere = begin();
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246 | const_iterator itend = end();
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247 | while (ithere != itend)
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248 | {
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249 | if (*ithere < 256) cstr[len] = (unsigned char)(*ithere);
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250 | else {
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251 | // put a space or a question mark depending on what
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252 | // the character is. Question marks tell the user that
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253 | // they are missing some information.
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254 | if (is_unicode_space (*ithere)) cstr[len] = ' ';
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255 | else cstr[len] = '?';
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256 | }
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257 | len++;
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258 | ithere++;
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259 | }
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260 |
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261 | return (char *)cstr;
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262 | }
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263 |
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264 | char *text_t::getcstr() const
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265 | {
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266 | unsigned char *cstr = new unsigned char[size() + 1];
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267 | const_iterator ithere = begin();
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268 | const_iterator itend = end();
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269 | int len = 0;
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270 |
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271 | while (ithere != itend)
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272 | {
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273 | if (*ithere < 256) cstr[len] = (unsigned char)(*ithere);
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274 | else {
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275 | // put a space or a question mark depending on what
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276 | // the character is. Question marks tell the user that
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277 | // they are missing some information.
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278 | if (is_unicode_space (*ithere)) cstr[len] = ' ';
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279 | else cstr[len] = '?';
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280 | }
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281 | len++;
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282 | ithere++;
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283 | }
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284 |
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285 | cstr[len] = '\0';
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286 |
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287 | return (char *)cstr;
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288 | }
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289 |
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290 |
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291 | // general functions which work on text_ts
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292 |
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293 | // find a character within a range
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294 | text_t::const_iterator findchar (text_t::const_iterator first, text_t::const_iterator last,
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295 | unsigned short c)
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296 | {
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297 | while (first != last)
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298 | {
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299 | if (*first == c) break;
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300 | first++;
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301 | }
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302 | return first;
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303 | }
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304 |
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305 | text_t::iterator findchar (text_t::iterator first, text_t::iterator last,
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306 | unsigned short c)
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307 | {
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308 | while (first != last)
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309 | {
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310 | if (*first == c) break;
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311 | first++;
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312 | }
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313 | return first;
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314 | }
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315 |
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316 | // get a string up to the next delimiter (which is skipped)
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317 | text_t::const_iterator getdelimitstr (text_t::const_iterator first,
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318 | text_t::const_iterator last,
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319 | unsigned short c, text_t &outstr)
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320 | {
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321 | text_t::const_iterator here = first;
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322 | here = findchar (first, last, c);
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323 | outstr.clear();
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324 | outstr.appendrange (first, here);
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325 | if (here != last) here++; // skip c
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326 | return here;
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327 | }
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328 |
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329 | text_t::iterator getdelimitstr (text_t::iterator first, text_t::iterator last,
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330 | unsigned short c, text_t &outstr)
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331 | {
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332 | text_t::iterator here = first;
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333 | here = findchar (first, last, c);
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334 | outstr.clear();
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335 | outstr.appendrange (first, here);
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336 | if (here != last) here++; // skip c
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337 | return here;
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338 | }
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339 |
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340 | // split a string with a character
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341 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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342 | unsigned short c, text_tset &outlist)
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343 | {
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344 | outlist.erase(outlist.begin(), outlist.end());
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345 |
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346 | text_t t;
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347 |
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348 | while (first != last)
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349 | {
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350 | first = getdelimitstr (first, last, c, t);
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351 | outlist.insert (t);
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352 | }
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353 | }
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354 |
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355 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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356 | unsigned short c, text_tlist &outlist)
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357 | {
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358 | outlist.erase(outlist.begin(), outlist.end());
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359 |
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360 | text_t t;
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361 |
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362 | while (first != last)
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363 | {
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364 | first = getdelimitstr (first, last, c, t);
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365 | outlist.push_back (t);
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366 | }
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367 | }
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368 |
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369 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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370 | unsigned short c, text_tarray &outlist)
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371 | {
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372 | outlist.erase(outlist.begin(), outlist.end());
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373 |
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374 | text_t t;
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375 |
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376 | while (first != last)
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377 | {
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378 | first = getdelimitstr (first, last, c, t);
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379 | outlist.push_back (t);
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380 | }
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381 | }
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382 |
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383 | // join a string using a character
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384 | void joinchar (const text_tset &inlist, unsigned short c, text_t &outtext)
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385 | {
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386 | outtext.clear ();
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387 |
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388 | text_tset::const_iterator here = inlist.begin ();
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389 | text_tset::const_iterator end = inlist.end ();
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390 | bool first = true;
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391 | while (here != end)
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392 | {
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393 | if (!first) outtext.push_back (c);
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394 | first = false;
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395 | outtext += *here;
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396 | here++;
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397 | }
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398 | }
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399 |
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400 | void joinchar (const text_tlist &inlist, unsigned short c, text_t &outtext)
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401 | {
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402 | outtext.clear ();
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403 |
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404 | text_tlist::const_iterator here = inlist.begin ();
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405 | text_tlist::const_iterator end = inlist.end ();
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406 | bool first = true;
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407 | while (here != end)
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408 | {
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409 | if (!first) outtext.push_back (c);
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410 | first = false;
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411 | outtext += *here;
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412 | here++;
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413 | }
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414 | }
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415 |
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416 | void joinchar (const text_tarray &inlist, unsigned short c, text_t &outtext)
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417 | {
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418 | outtext.clear ();
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419 |
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420 | text_tarray::const_iterator here = inlist.begin ();
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421 | text_tarray::const_iterator end = inlist.end ();
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422 | bool first = true;
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423 | while (here != end)
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424 | {
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425 | if (!first) outtext.push_back (c);
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426 | first = false;
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427 | outtext += *here;
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428 | here++;
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429 | }
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430 | }
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431 |
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432 | // count the occurances of a character within a range
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433 | int countchar (text_t::const_iterator first, text_t::const_iterator last,
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434 | unsigned short c)
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435 | {
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436 | int count = 0;
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437 | while (first != last) {
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438 | if (*first == c) count ++;
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439 | first ++;
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440 | }
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441 | return count;
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442 | }
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443 |
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444 | // return a substring of string from first up to but not including last
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445 | text_t substr (text_t::const_iterator first, text_t::const_iterator last) {
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446 |
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447 | text_t substr;
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448 | while (first != last) {
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449 | substr.push_back(*first);
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450 | first ++;
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451 | }
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452 | return substr;
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453 | }
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454 |
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455 |
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456 | // convert to lowercase
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457 | void lc (text_t::iterator first, text_t::iterator last) {
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458 | while (first != last) {
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459 | *first = unicode_tolower(*first);
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460 | first++;
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461 | }
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462 | }
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463 |
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464 | // convert to uppercase
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465 | void uc (text_t::iterator first, text_t::iterator last) {
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466 | while (first != last) {
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467 | *first = unicode_toupper(*first);
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468 | first++;
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469 | }
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470 | }
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471 |
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472 |
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473 | // checks to see if it is a number (i.e. contains only 0-9)
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474 | bool is_number (const text_t &text) {
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475 |
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476 | text_t::const_iterator here = text.begin();
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477 | text_t::const_iterator end = text.end();
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478 |
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479 | while (here != end) {
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480 | if ((*here!='0') && (*here!='1') && (*here!='2') &&
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481 | (*here!='3') && (*here!='4') && (*here!='5') &&
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482 | (*here!='6') && (*here!='7') && (*here!='8') &&
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483 | (*here!='9')) return false;
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484 | here ++;
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485 | }
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486 | return true;
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487 | }
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488 |
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489 |
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490 |
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491 | ////////////////////////////////////
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492 | // convertclass methods
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493 | ////////////////////////////////////
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494 |
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495 | // conversion classes used for getting information in to and out of
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496 | // the text_t class.
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497 |
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498 | convertclass::convertclass ()
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499 | {
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500 | // nothing to do
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501 | }
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502 |
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503 | void convertclass::reset ()
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504 | {
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505 | // nothing to do
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506 | }
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507 |
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508 |
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509 | ////////////////////////////////////
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510 | // inconvertclass methods
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511 | ////////////////////////////////////
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512 |
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513 | // convert from a char stream to the text_t class
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514 | // the default version assumes the input is a ascii
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515 | // character array
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516 |
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517 | inconvertclass::inconvertclass ()
|
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518 | {
|
---|
519 | start = NULL;
|
---|
520 | len = 0;
|
---|
521 | }
|
---|
522 |
|
---|
523 |
|
---|
524 | void inconvertclass::reset ()
|
---|
525 | {
|
---|
526 | start = NULL;
|
---|
527 | len = 0;
|
---|
528 | }
|
---|
529 |
|
---|
530 | void inconvertclass::setinput (char *thestart, size_t thelen)
|
---|
531 | {
|
---|
532 | start = thestart;
|
---|
533 | len = thelen;
|
---|
534 | }
|
---|
535 |
|
---|
536 | void inconvertclass::convert (text_t &output, status_t &status)
|
---|
537 | {
|
---|
538 | output.clear();
|
---|
539 |
|
---|
540 | if (start == NULL || len == 0)
|
---|
541 | {
|
---|
542 | status = finished;
|
---|
543 | return;
|
---|
544 | }
|
---|
545 |
|
---|
546 | // don't want any funny sign conversions happening
|
---|
547 | unsigned char *here = (unsigned char *)start;
|
---|
548 | while (len > 0)
|
---|
549 | {
|
---|
550 | output.push_back (*here); // append this character
|
---|
551 | ++here;
|
---|
552 | --len;
|
---|
553 | }
|
---|
554 |
|
---|
555 | start = (char *)here; // save current position
|
---|
556 | status = finished;
|
---|
557 | }
|
---|
558 |
|
---|
559 | // will treat the text_t as a 8-bit string and convert
|
---|
560 | // it to a 16-bit string using the about convert method.
|
---|
561 | text_t inconvertclass::convert (const text_t &t) {
|
---|
562 | text_t out;
|
---|
563 | text_t tmpout;
|
---|
564 | status_t status;
|
---|
565 | text_t::const_iterator here = t.begin();
|
---|
566 | text_t::const_iterator end = t.end();
|
---|
567 | unsigned char cbuf[256];
|
---|
568 | size_t cbuflen = 0;
|
---|
569 |
|
---|
570 | while (here != end) {
|
---|
571 | while (here != end && cbuflen < 256) {
|
---|
572 | cbuf[cbuflen++] = (unsigned char)(*here & 0xff);
|
---|
573 | here++;
|
---|
574 | }
|
---|
575 |
|
---|
576 | if (cbuflen > 0) {
|
---|
577 | setinput ((char *)cbuf, cbuflen);
|
---|
578 | status = unfinished;
|
---|
579 | while (status == unfinished) {
|
---|
580 | convert (tmpout, status);
|
---|
581 | out += tmpout;
|
---|
582 | }
|
---|
583 | cbuflen = 0;
|
---|
584 | }
|
---|
585 | }
|
---|
586 |
|
---|
587 | out.setencoding (0); // unicode
|
---|
588 |
|
---|
589 | return out;
|
---|
590 | }
|
---|
591 |
|
---|
592 | // an instance of the default inconvertclass to do simple
|
---|
593 | // conversions. Note that any functions that use this are
|
---|
594 | // not reentrant. If a function needs to be reentrant it
|
---|
595 | // should declare its own instance.
|
---|
596 | inconvertclass ascii2text_t;
|
---|
597 |
|
---|
598 |
|
---|
599 | ////////////////////////////////////
|
---|
600 | // outconvertclass methods
|
---|
601 | ////////////////////////////////////
|
---|
602 |
|
---|
603 | // Convert from a text_t class to a char stream
|
---|
604 | // This default version assumes the output is a ascii
|
---|
605 | // character array. If you set the output stream you
|
---|
606 | // can use this class to output to a stream using the
|
---|
607 | // << operator. The << operator can also be conveniently
|
---|
608 | // used to set the output stream by doing something like
|
---|
609 | //
|
---|
610 | // cout << text_t2ascii << text_tstr << anothertext_tstr;
|
---|
611 | //
|
---|
612 | outconvertclass::outconvertclass ()
|
---|
613 | {
|
---|
614 | input = NULL;
|
---|
615 | outs = NULL;
|
---|
616 | }
|
---|
617 |
|
---|
618 | void outconvertclass::reset ()
|
---|
619 | {
|
---|
620 | input = NULL;
|
---|
621 | outs = NULL;
|
---|
622 | }
|
---|
623 |
|
---|
624 | void outconvertclass::setinput (text_t *theinput)
|
---|
625 | {
|
---|
626 | input = theinput;
|
---|
627 | if (input != NULL) texthere = input->begin();
|
---|
628 | }
|
---|
629 |
|
---|
630 | void outconvertclass::convert (char *output, size_t maxlen,
|
---|
631 | size_t &len, status_t &status)
|
---|
632 | {
|
---|
633 | if (input == NULL || output == NULL)
|
---|
634 | {
|
---|
635 | status = finished;
|
---|
636 | return;
|
---|
637 | }
|
---|
638 |
|
---|
639 | // don't want any funny sign conversions happening
|
---|
640 | unsigned char *uoutput = (unsigned char *)output;
|
---|
641 | text_t::iterator textend = input->end();
|
---|
642 | len = 0;
|
---|
643 | while ((len < maxlen) && (texthere != textend))
|
---|
644 | {
|
---|
645 | if (*texthere < 256) *uoutput = (unsigned char)(*texthere);
|
---|
646 | else {
|
---|
647 | // put a space or a question mark depending on what
|
---|
648 | // the character is. Question marks tell the user that
|
---|
649 | // they are missing some information.
|
---|
650 | if (is_unicode_space (*texthere)) *uoutput = ' ';
|
---|
651 | else *uoutput = '?';
|
---|
652 | }
|
---|
653 | ++uoutput;
|
---|
654 | ++len;
|
---|
655 | ++texthere;
|
---|
656 | }
|
---|
657 |
|
---|
658 | if (texthere == textend) status = finished;
|
---|
659 | else status = unfinished;
|
---|
660 | }
|
---|
661 |
|
---|
662 | // will convert the 16-bit string to a 8-bit stream
|
---|
663 | // and place the result in a text_t. This method uses
|
---|
664 | // the above convert function.
|
---|
665 | text_t outconvertclass::convert (const text_t &t) {
|
---|
666 | text_t out;
|
---|
667 | unsigned char cbuf[256];
|
---|
668 | size_t cbuflen = 0;
|
---|
669 | status_t status = unfinished;
|
---|
670 |
|
---|
671 | setinput ((text_t *)&t); // discard constant
|
---|
672 | while (status == unfinished) {
|
---|
673 | convert ((char *)cbuf, 256, cbuflen, status);
|
---|
674 | out.appendcarr ((char *)cbuf, cbuflen);
|
---|
675 | }
|
---|
676 |
|
---|
677 | out.setencoding (1); // other encoding
|
---|
678 |
|
---|
679 | return out;
|
---|
680 | }
|
---|
681 |
|
---|
682 |
|
---|
683 | void outconvertclass::setostream (ostream *theouts)
|
---|
684 | {
|
---|
685 | outs = theouts;
|
---|
686 | }
|
---|
687 |
|
---|
688 | ostream *outconvertclass::getostream ()
|
---|
689 | {
|
---|
690 | return outs;
|
---|
691 | }
|
---|
692 |
|
---|
693 |
|
---|
694 |
|
---|
695 |
|
---|
696 | // an instance of the default outconvertclass to do simple
|
---|
697 | // conversions
|
---|
698 | outconvertclass text_t2ascii;
|
---|
699 |
|
---|
700 |
|
---|
701 |
|
---|
702 | // stream operators for the output class
|
---|
703 |
|
---|
704 | outconvertclass &operator<< (ostream &theouts, outconvertclass &outconverter)
|
---|
705 | {
|
---|
706 | outconverter.setostream(&theouts);
|
---|
707 | return outconverter;
|
---|
708 | }
|
---|
709 |
|
---|
710 |
|
---|
711 | #define STREAMBUFSIZE 256
|
---|
712 | outconvertclass &operator<< (outconvertclass &outconverter, const text_t &t)
|
---|
713 | {
|
---|
714 | ostream *outstream = outconverter.getostream();
|
---|
715 |
|
---|
716 | if (outstream == NULL) return outconverter;
|
---|
717 |
|
---|
718 | char outbuf[STREAMBUFSIZE];
|
---|
719 | size_t len;
|
---|
720 | outconvertclass::status_t status = outconvertclass::unfinished;
|
---|
721 |
|
---|
722 | // assume that there is no data needing converting
|
---|
723 | // left in the converter
|
---|
724 | outconverter.setinput ((text_t *)(&t)); // note the const -> nonconst conversion
|
---|
725 |
|
---|
726 | while (status == outconvertclass::unfinished)
|
---|
727 | {
|
---|
728 | outconverter.convert (outbuf, STREAMBUFSIZE, len, status);
|
---|
729 | if (len > 0) outstream->write(outbuf, len);
|
---|
730 | }
|
---|
731 |
|
---|
732 | return outconverter;
|
---|
733 | }
|
---|