1 | /* |
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2 | www.sourceforge.net/projects/tinyxml |
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3 | Original file by Yves Berquin. |
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4 | |
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5 | This software is provided 'as-is', without any express or implied |
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6 | warranty. In no event will the authors be held liable for any |
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7 | damages arising from the use of this software. |
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8 | |
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9 | Permission is granted to anyone to use this software for any |
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10 | purpose, including commercial applications, and to alter it and |
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11 | redistribute it freely, subject to the following restrictions: |
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12 | |
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13 | 1. The origin of this software must not be misrepresented; you must |
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14 | not claim that you wrote the original software. If you use this |
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15 | software in a product, an acknowledgment in the product documentation |
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16 | would be appreciated but is not required. |
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17 | |
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18 | 2. Altered source versions must be plainly marked as such, and |
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19 | must not be misrepresented as being the original software. |
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20 | |
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21 | 3. This notice may not be removed or altered from any source |
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22 | distribution. |
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23 | */ |
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24 | |
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25 | #include "tinyxml.h" |
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26 | |
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27 | #ifndef TIXML_USE_STL |
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28 | |
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29 | |
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30 | #include <stdlib.h> |
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31 | #include <string.h> |
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32 | #include <ctype.h> |
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33 | |
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34 | #include "tinystr.h" |
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35 | |
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36 | // TiXmlString constructor, based on a C string |
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37 | TiXmlString::TiXmlString (const char* instring) |
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38 | { |
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39 | unsigned newlen; |
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40 | char * newstring; |
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41 | |
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42 | if (!instring) |
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43 | { |
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44 | allocated = 0; |
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45 | cstring = NULL; |
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46 | return; |
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47 | } |
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48 | newlen = strlen (instring) + 1; |
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49 | newstring = new char [newlen]; |
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50 | strcpy (newstring, instring); |
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51 | allocated = newlen; |
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52 | cstring = newstring; |
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53 | } |
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54 | |
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55 | // TiXmlString copy constructor |
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56 | TiXmlString::TiXmlString (const TiXmlString& copy) |
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57 | { |
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58 | unsigned newlen; |
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59 | char * newstring; |
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60 | |
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61 | // Prevent copy to self! |
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62 | if ( © == this ) |
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63 | return; |
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64 | |
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65 | if (! copy . allocated) |
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66 | { |
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67 | allocated = 0; |
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68 | cstring = NULL; |
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69 | return; |
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70 | } |
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71 | newlen = strlen (copy . cstring) + 1; |
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72 | newstring = new char [newlen]; |
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73 | strcpy (newstring, copy . cstring); |
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74 | allocated = newlen; |
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75 | cstring = newstring; |
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76 | } |
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77 | |
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78 | // TiXmlString = operator. Safe when assign own content |
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79 | void TiXmlString ::operator = (const char * content) |
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80 | { |
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81 | unsigned newlen; |
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82 | char * newstring; |
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83 | |
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84 | if (! content) |
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85 | { |
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86 | empty_it (); |
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87 | return; |
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88 | } |
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89 | newlen = strlen (content) + 1; |
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90 | newstring = new char [newlen]; |
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91 | strcpy (newstring, content); |
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92 | empty_it (); |
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93 | allocated = newlen; |
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94 | cstring = newstring; |
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95 | } |
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96 | |
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97 | // = operator. Safe when assign own content |
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98 | void TiXmlString ::operator = (const TiXmlString & copy) |
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99 | { |
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100 | unsigned newlen; |
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101 | char * newstring; |
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102 | |
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103 | if (! copy . length ()) |
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104 | { |
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105 | empty_it (); |
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106 | return; |
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107 | } |
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108 | newlen = copy . length () + 1; |
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109 | newstring = new char [newlen]; |
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110 | strcpy (newstring, copy . c_str ()); |
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111 | empty_it (); |
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112 | allocated = newlen; |
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113 | cstring = newstring; |
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114 | } |
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115 | |
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116 | |
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117 | //// Checks if a TiXmlString contains only whitespace (same rules as isspace) |
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118 | //bool TiXmlString::isblank () const |
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119 | //{ |
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120 | // char * lookup; |
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121 | // for (lookup = cstring; * lookup; lookup++) |
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122 | // if (! isspace (* lookup)) |
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123 | // return false; |
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124 | // return true; |
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125 | //} |
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126 | |
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127 | // append a const char * to an existing TiXmlString |
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128 | void TiXmlString::append( const char* str, int len ) |
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129 | { |
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130 | char * new_string; |
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131 | unsigned new_alloc, new_size; |
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132 | |
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133 | new_size = length () + len + 1; |
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134 | // check if we need to expand |
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135 | if (new_size > allocated) |
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136 | { |
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137 | // compute new size |
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138 | new_alloc = assign_new_size (new_size); |
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139 | |
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140 | // allocate new buffer |
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141 | new_string = new char [new_alloc]; |
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142 | new_string [0] = 0; |
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143 | |
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144 | // copy the previous allocated buffer into this one |
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145 | if (allocated && cstring) |
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146 | strcpy (new_string, cstring); |
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147 | |
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148 | // append the suffix. It does exist, otherwize we wouldn't be expanding |
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149 | strncat (new_string, str, len); |
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150 | |
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151 | // return previsously allocated buffer if any |
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152 | if (allocated && cstring) |
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153 | delete [] cstring; |
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154 | |
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155 | // update member variables |
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156 | cstring = new_string; |
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157 | allocated = new_alloc; |
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158 | } |
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159 | else |
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160 | // we know we can safely append the new string |
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161 | strncat (cstring, str, len); |
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162 | } |
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163 | |
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164 | |
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165 | // append a const char * to an existing TiXmlString |
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166 | void TiXmlString::append( const char * suffix ) |
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167 | { |
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168 | char * new_string; |
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169 | unsigned new_alloc, new_size; |
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170 | |
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171 | new_size = length () + strlen (suffix) + 1; |
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172 | // check if we need to expand |
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173 | if (new_size > allocated) |
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174 | { |
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175 | // compute new size |
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176 | new_alloc = assign_new_size (new_size); |
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177 | |
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178 | // allocate new buffer |
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179 | new_string = new char [new_alloc]; |
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180 | new_string [0] = 0; |
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181 | |
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182 | // copy the previous allocated buffer into this one |
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183 | if (allocated && cstring) |
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184 | strcpy (new_string, cstring); |
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185 | |
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186 | // append the suffix. It does exist, otherwize we wouldn't be expanding |
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187 | strcat (new_string, suffix); |
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188 | |
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189 | // return previsously allocated buffer if any |
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190 | if (allocated && cstring) |
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191 | delete [] cstring; |
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192 | |
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193 | // update member variables |
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194 | cstring = new_string; |
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195 | allocated = new_alloc; |
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196 | } |
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197 | else |
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198 | // we know we can safely append the new string |
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199 | strcat (cstring, suffix); |
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200 | } |
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201 | |
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202 | // Check for TiXmlString equuivalence |
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203 | //bool TiXmlString::operator == (const TiXmlString & compare) const |
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204 | //{ |
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205 | // return (! strcmp (c_str (), compare . c_str ())); |
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206 | //} |
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207 | |
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208 | unsigned TiXmlString::length () const |
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209 | { |
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210 | if (allocated) |
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211 | return strlen (cstring); |
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212 | return 0; |
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213 | } |
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214 | |
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215 | |
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216 | unsigned TiXmlString::find (char tofind, unsigned offset) const |
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217 | { |
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218 | char * lookup; |
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219 | |
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220 | if (offset >= length ()) |
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221 | return (unsigned) notfound; |
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222 | for (lookup = cstring + offset; * lookup; lookup++) |
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223 | if (* lookup == tofind) |
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224 | return lookup - cstring; |
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225 | return (unsigned) notfound; |
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226 | } |
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227 | |
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228 | |
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229 | bool TiXmlString::operator == (const TiXmlString & compare) const |
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230 | { |
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231 | if ( allocated && compare.allocated ) |
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232 | { |
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233 | assert( cstring ); |
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234 | assert( compare.cstring ); |
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235 | return ( strcmp( cstring, compare.cstring ) == 0 ); |
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236 | } |
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237 | return false; |
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238 | } |
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239 | |
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240 | |
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241 | bool TiXmlString::operator < (const TiXmlString & compare) const |
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242 | { |
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243 | if ( allocated && compare.allocated ) |
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244 | { |
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245 | assert( cstring ); |
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246 | assert( compare.cstring ); |
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247 | return ( strcmp( cstring, compare.cstring ) > 0 ); |
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248 | } |
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249 | return false; |
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250 | } |
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251 | |
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252 | |
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253 | bool TiXmlString::operator > (const TiXmlString & compare) const |
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254 | { |
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255 | if ( allocated && compare.allocated ) |
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256 | { |
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257 | assert( cstring ); |
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258 | assert( compare.cstring ); |
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259 | return ( strcmp( cstring, compare.cstring ) < 0 ); |
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260 | } |
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261 | return false; |
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262 | } |
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263 | |
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264 | |
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265 | #endif // TIXML_USE_STL |
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