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 <span id="projectnumber">3.03</span>
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<div class="title">/usr/local/google/home/jbreiden/tesseract-ocr-read-only/ccutil/strngs.cpp</div> </div>
102
<div class="contents">
103
<a href="a00854.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/**********************************************************************</span>
104
<a name="l00002"></a>00002 <span class="comment"> * File: strngs.c (Formerly strings.c)</span>
105
<a name="l00003"></a>00003 <span class="comment"> * Description: STRING class functions.</span>
106
<a name="l00004"></a>00004 <span class="comment"> * Author: Ray Smith</span>
107
<a name="l00005"></a>00005 <span class="comment"> * Created: Fri Feb 15 09:13:30 GMT 1991</span>
108
<a name="l00006"></a>00006 <span class="comment"> *</span>
109
<a name="l00007"></a>00007 <span class="comment"> * (C) Copyright 1991, Hewlett-Packard Ltd.</span>
110
<a name="l00008"></a>00008 <span class="comment"> ** Licensed under the Apache License, Version 2.0 (the "License");</span>
111
<a name="l00009"></a>00009 <span class="comment"> ** you may not use this file except in compliance with the License.</span>
112
<a name="l00010"></a>00010 <span class="comment"> ** You may obtain a copy of the License at</span>
113
<a name="l00011"></a>00011 <span class="comment"> ** http://www.apache.org/licenses/LICENSE-2.0</span>
114
<a name="l00012"></a>00012 <span class="comment"> ** Unless required by applicable law or agreed to in writing, software</span>
115
<a name="l00013"></a>00013 <span class="comment"> ** distributed under the License is distributed on an "AS IS" BASIS,</span>
116
<a name="l00014"></a>00014 <span class="comment"> ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
117
<a name="l00015"></a>00015 <span class="comment"> ** See the License for the specific language governing permissions and</span>
118
<a name="l00016"></a>00016 <span class="comment"> ** limitations under the License.</span>
119
<a name="l00017"></a>00017 <span class="comment"> *</span>
120
<a name="l00018"></a>00018 <span class="comment"> **********************************************************************/</span>
121
<a name="l00019"></a>00019
122
<a name="l00020"></a>00020 <span class="preprocessor">#include "<a class="code" href="a00830.html">helpers.h</a>"</span>
123
<a name="l00021"></a>00021 <span class="preprocessor">#include "<a class="code" href="a00860.html">tprintf.h</a>"</span>
124
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="a00855.html">strngs.h</a>"</span>
125
<a name="l00023"></a>00023 <span class="preprocessor">#include "<a class="code" href="a00826.html">genericvector.h</a>"</span>
126
<a name="l00024"></a>00024
127
<a name="l00025"></a>00025 <span class="preprocessor">#include <assert.h></span>
128
<a name="l00026"></a>00026 <span class="comment">// Size of buffer needed to host the decimal representation of the maximum</span>
129
<a name="l00027"></a>00027 <span class="comment">// possible length of an int (in 64 bits), being -<20 digits>.</span>
130
<a name="l00028"></a><a class="code" href="a00854.html#a98ff26a02a0502569b1676ed30fb1b40">00028</a> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="a00854.html#a98ff26a02a0502569b1676ed30fb1b40">kMaxIntSize</a> = 22;
131
<a name="l00029"></a>00029 <span class="comment">// Size of buffer needed to host the decimal representation of the maximum</span>
132
<a name="l00030"></a>00030 <span class="comment">// possible length of a %.8g being -0.12345678e+999<nul> = 15.</span>
133
<a name="l00031"></a><a class="code" href="a00854.html#af3b99544fb662fce123799a16b6050b5">00031</a> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="a00854.html#af3b99544fb662fce123799a16b6050b5">kMaxDoubleSize</a> = 15;
134
<a name="l00032"></a>00032
135
<a name="l00033"></a>00033 <span class="comment">/**********************************************************************</span>
136
<a name="l00034"></a>00034 <span class="comment"> * STRING_HEADER provides metadata about the allocated buffer,</span>
137
<a name="l00035"></a>00035 <span class="comment"> * including total capacity and how much used (strlen with '\0').</span>
138
<a name="l00036"></a>00036 <span class="comment"> *</span>
139
<a name="l00037"></a>00037 <span class="comment"> * The implementation hides this header at the start of the data</span>
140
<a name="l00038"></a>00038 <span class="comment"> * buffer and appends the string on the end to keep sizeof(STRING)</span>
141
<a name="l00039"></a>00039 <span class="comment"> * unchanged from earlier versions so serialization is not affected.</span>
142
<a name="l00040"></a>00040 <span class="comment"> *</span>
143
<a name="l00041"></a>00041 <span class="comment"> * The collection of MACROS provide different implementations depending</span>
144
<a name="l00042"></a>00042 <span class="comment"> * on whether the string keeps track of its strlen or not so that this</span>
145
<a name="l00043"></a>00043 <span class="comment"> * feature can be added in later when consumers dont modifify the string</span>
146
<a name="l00044"></a>00044 <span class="comment"> **********************************************************************/</span>
147
<a name="l00045"></a>00045
148
<a name="l00046"></a>00046 <span class="comment">// Smallest string to allocate by default</span>
149
<a name="l00047"></a><a class="code" href="a00854.html#a927f7d5b361de249344c06b29aa6ca27">00047</a> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="a00854.html#a927f7d5b361de249344c06b29aa6ca27">kMinCapacity</a> = 16;
150
<a name="l00048"></a>00048
151
<a name="l00049"></a>00049 <span class="keywordtype">char</span>* STRING::AllocData(<span class="keywordtype">int</span> used, <span class="keywordtype">int</span> capacity) {
152
<a name="l00050"></a>00050 data_ = (STRING_HEADER *)<a class="code" href="a00837.html#a29cbb5255dbc65a22c2a47c21480f264">alloc_string</a>(capacity + <span class="keyword">sizeof</span>(STRING_HEADER));
153
<a name="l00051"></a>00051
154
<a name="l00052"></a>00052 <span class="comment">// header is the metadata for this memory block</span>
155
<a name="l00053"></a>00053 STRING_HEADER* header = GetHeader();
156
<a name="l00054"></a>00054 header->capacity_ = capacity;
157
<a name="l00055"></a>00055 header->used_ = used;
158
<a name="l00056"></a>00056 <span class="keywordflow">return</span> GetCStr();
159
<a name="l00057"></a>00057 }
160
<a name="l00058"></a>00058
161
<a name="l00059"></a>00059 <span class="keywordtype">void</span> STRING::DiscardData() {
162
<a name="l00060"></a>00060 <a class="code" href="a00837.html#aadab03126da19fefc98afefc9549d5c3">free_string</a>((<span class="keywordtype">char</span> *)data_);
163
<a name="l00061"></a>00061 }
164
<a name="l00062"></a>00062
165
<a name="l00063"></a>00063 <span class="comment">// This is a private method; ensure FixHeader is called (or used_ is well defined)</span>
166
<a name="l00064"></a>00064 <span class="comment">// beforehand</span>
167
<a name="l00065"></a>00065 <span class="keywordtype">char</span>* STRING::ensure_cstr(<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> min_capacity) {
168
<a name="l00066"></a>00066 STRING_HEADER* orig_header = GetHeader();
169
<a name="l00067"></a>00067 <span class="keywordflow">if</span> (min_capacity <= orig_header->capacity_)
170
<a name="l00068"></a>00068 <span class="keywordflow">return</span> ((<span class="keywordtype">char</span> *)this->data_) + <span class="keyword">sizeof</span>(STRING_HEADER);
171
<a name="l00069"></a>00069
172
<a name="l00070"></a>00070 <span class="comment">// if we are going to grow bigger, than double our existing</span>
173
<a name="l00071"></a>00071 <span class="comment">// size, but if that still is not big enough then keep the</span>
174
<a name="l00072"></a>00072 <span class="comment">// requested capacity</span>
175
<a name="l00073"></a>00073 <span class="keywordflow">if</span> (min_capacity < 2 * orig_header->capacity_)
176
<a name="l00074"></a>00074 min_capacity = 2 * orig_header->capacity_;
177
<a name="l00075"></a>00075
178
<a name="l00076"></a>00076 <span class="keywordtype">int</span> alloc = <span class="keyword">sizeof</span>(STRING_HEADER) + min_capacity;
179
<a name="l00077"></a>00077 STRING_HEADER* new_header = (STRING_HEADER*)(<a class="code" href="a00837.html#a29cbb5255dbc65a22c2a47c21480f264">alloc_string</a>(alloc));
180
<a name="l00078"></a>00078
181
<a name="l00079"></a>00079 memcpy(&new_header[1], GetCStr(), orig_header->used_);
182
<a name="l00080"></a>00080 new_header->capacity_ = min_capacity;
183
<a name="l00081"></a>00081 new_header->used_ = orig_header->used_;
184
<a name="l00082"></a>00082
185
<a name="l00083"></a>00083 <span class="comment">// free old memory, then rebind to new memory</span>
186
<a name="l00084"></a>00084 DiscardData();
187
<a name="l00085"></a>00085 data_ = new_header;
188
<a name="l00086"></a>00086
189
<a name="l00087"></a>00087 assert(InvariantOk());
190
<a name="l00088"></a>00088 <span class="keywordflow">return</span> ((<span class="keywordtype">char</span> *)data_) + <span class="keyword">sizeof</span>(STRING_HEADER);
191
<a name="l00089"></a>00089 }
192
<a name="l00090"></a>00090
193
<a name="l00091"></a>00091 <span class="comment">// This is const, but is modifying a mutable field</span>
194
<a name="l00092"></a>00092 <span class="comment">// this way it can be used on const or non-const instances.</span>
195
<a name="l00093"></a>00093 <span class="keywordtype">void</span> STRING::FixHeader()<span class="keyword"> const </span>{
196
<a name="l00094"></a>00094 <span class="keyword">const</span> STRING_HEADER* header = GetHeader();
197
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (header->used_ < 0)
198
<a name="l00096"></a>00096 header->used_ = strlen(GetCStr()) + 1;
199
<a name="l00097"></a>00097 }
200
<a name="l00098"></a>00098
201
<a name="l00099"></a>00099
202
<a name="l00100"></a><a class="code" href="a00557.html#a1c63ec33ab6f6afeb82827be3d4e6ab0">00100</a> <a class="code" href="a00557.html#a1c63ec33ab6f6afeb82827be3d4e6ab0">STRING::STRING</a>() {
203
<a name="l00101"></a>00101 <span class="comment">// Empty STRINGs contain just the "\0".</span>
204
<a name="l00102"></a>00102 memcpy(AllocData(1, <a class="code" href="a00854.html#a927f7d5b361de249344c06b29aa6ca27">kMinCapacity</a>), <span class="stringliteral">""</span>, 1);
205
<a name="l00103"></a>00103 }
206
<a name="l00104"></a>00104
207
<a name="l00105"></a><a class="code" href="a00557.html#a6a78dbb21ad4450d44e833a21ec6576c">00105</a> <a class="code" href="a00557.html#a1c63ec33ab6f6afeb82827be3d4e6ab0">STRING::STRING</a>(<span class="keyword">const</span> <a class="code" href="a00557.html">STRING</a>& str) {
208
<a name="l00106"></a>00106 str.FixHeader();
209
<a name="l00107"></a>00107 <span class="keyword">const</span> STRING_HEADER* str_header = str.GetHeader();
210
<a name="l00108"></a>00108 <span class="keywordtype">int</span> str_used = str_header->used_;
211
<a name="l00109"></a>00109 <span class="keywordtype">char</span> *this_cstr = AllocData(str_used, str_used);
212
<a name="l00110"></a>00110 memcpy(this_cstr, str.GetCStr(), str_used);
213
<a name="l00111"></a>00111 assert(InvariantOk());
214
<a name="l00112"></a>00112 }
215
<a name="l00113"></a>00113
216
<a name="l00114"></a><a class="code" href="a00557.html#aa23a4d1cacabbf5361a5ea641fb141e0">00114</a> <a class="code" href="a00557.html#a1c63ec33ab6f6afeb82827be3d4e6ab0">STRING::STRING</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* cstr) {
217
<a name="l00115"></a>00115 <span class="keywordflow">if</span> (cstr == NULL) {
218
<a name="l00116"></a>00116 <span class="comment">// Empty STRINGs contain just the "\0".</span>
219
<a name="l00117"></a>00117 memcpy(AllocData(1, <a class="code" href="a00854.html#a927f7d5b361de249344c06b29aa6ca27">kMinCapacity</a>), <span class="stringliteral">""</span>, 1);
220
<a name="l00118"></a>00118 } <span class="keywordflow">else</span> {
221
<a name="l00119"></a>00119 <span class="keywordtype">int</span> len = strlen(cstr) + 1;
222
<a name="l00120"></a>00120 <span class="keywordtype">char</span>* this_cstr = AllocData(len, len);
223
<a name="l00121"></a>00121 memcpy(this_cstr, cstr, len);
224
<a name="l00122"></a>00122 }
225
<a name="l00123"></a>00123 assert(InvariantOk());
226
<a name="l00124"></a>00124 }
227
<a name="l00125"></a>00125
228
<a name="l00126"></a><a class="code" href="a00557.html#a21efec4fdaf6c7bc96be3c634b4f6b7f">00126</a> <a class="code" href="a00557.html#a21efec4fdaf6c7bc96be3c634b4f6b7f">STRING::~STRING</a>() {
229
<a name="l00127"></a>00127 DiscardData();
230
<a name="l00128"></a>00128 }
231
<a name="l00129"></a>00129
232
<a name="l00130"></a>00130 <span class="comment">// Writes to the given file. Returns false in case of error.</span>
233
<a name="l00131"></a><a class="code" href="a00557.html#ad2e7e107c5f78f7f716e7688b1cc2d4a">00131</a> <span class="keywordtype">bool</span> <a class="code" href="a00557.html#ad2e7e107c5f78f7f716e7688b1cc2d4a">STRING::Serialize</a>(FILE* fp)<span class="keyword"> const </span>{
234
<a name="l00132"></a>00132 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> len = <a class="code" href="a00557.html#a168505a533eda60219c93e25adf4cdc5">length</a>();
235
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (fwrite(&len, <span class="keyword">sizeof</span>(len), 1, fp) != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;
236
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (static_cast<int>(fwrite(GetCStr(), 1, len, fp)) != len) <span class="keywordflow">return</span> <span class="keyword">false</span>;
237
<a name="l00135"></a>00135 <span class="keywordflow">return</span> <span class="keyword">true</span>;
238
<a name="l00136"></a>00136 }
239
<a name="l00137"></a>00137 <span class="comment">// Reads from the given file. Returns false in case of error.</span>
240
<a name="l00138"></a>00138 <span class="comment">// If swap is true, assumes a big/little-endian swap is needed.</span>
241
<a name="l00139"></a><a class="code" href="a00557.html#addf44387285a0498e500b934eb7825f8">00139</a> <span class="keywordtype">bool</span> <a class="code" href="a00557.html#addf44387285a0498e500b934eb7825f8">STRING::DeSerialize</a>(<span class="keywordtype">bool</span> swap, FILE* fp) {
242
<a name="l00140"></a>00140 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> len;
243
<a name="l00141"></a>00141 <span class="keywordflow">if</span> (fread(&len, <span class="keyword">sizeof</span>(len), 1, fp) != 1) <span class="keywordflow">return</span> <span class="keyword">false</span>;
244
<a name="l00142"></a>00142 <span class="keywordflow">if</span> (swap)
245
<a name="l00143"></a>00143 <a class="code" href="a00830.html#ae7eeeca49954d4b13d269729f2fecd5a">ReverseN</a>(&len, <span class="keyword">sizeof</span>(len));
246
<a name="l00144"></a>00144 <a class="code" href="a00557.html#a0d5a6c456f8e3ef4b4a5077031573df8">truncate_at</a>(len);
247
<a name="l00145"></a>00145 <span class="keywordflow">if</span> (static_cast<int>(fread(GetCStr(), 1, len, fp)) != len) <span class="keywordflow">return</span> <span class="keyword">false</span>;
248
<a name="l00146"></a>00146 <span class="keywordflow">return</span> <span class="keyword">true</span>;
249
<a name="l00147"></a>00147 }
250
<a name="l00148"></a>00148
251
<a name="l00149"></a><a class="code" href="a00557.html#ad4c1a804168d9442f125944e7eb5159d">00149</a> <a class="code" href="a00831.html#a7712a7e28433d0ade59219a129549b6f">BOOL8</a> <a class="code" href="a00557.html#ad4c1a804168d9442f125944e7eb5159d">STRING::contains</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> c)<span class="keyword"> const </span>{
252
<a name="l00150"></a>00150 <span class="keywordflow">return</span> (c != <span class="charliteral">'\0'</span>) && (strchr (GetCStr(), c) != NULL);
253
<a name="l00151"></a>00151 }
254
<a name="l00152"></a>00152
255
<a name="l00153"></a><a class="code" href="a00557.html#a168505a533eda60219c93e25adf4cdc5">00153</a> <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> <a class="code" href="a00557.html#a168505a533eda60219c93e25adf4cdc5">STRING::length</a>()<span class="keyword"> const </span>{
256
<a name="l00154"></a>00154 FixHeader();
257
<a name="l00155"></a>00155 <span class="keywordflow">return</span> GetHeader()->used_ - 1;
258
<a name="l00156"></a>00156 }
259
<a name="l00157"></a>00157
260
<a name="l00158"></a><a class="code" href="a00557.html#a32beee43ecab1bed8bebc3466896ad6e">00158</a> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="a00557.html#a32beee43ecab1bed8bebc3466896ad6e">STRING::string</a>()<span class="keyword"> const </span>{
261
<a name="l00159"></a>00159 <span class="keyword">const</span> STRING_HEADER* header = GetHeader();
262
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (header->used_ == 0)
263
<a name="l00161"></a>00161 <span class="keywordflow">return</span> NULL;
264
<a name="l00162"></a>00162
265
<a name="l00163"></a>00163 <span class="comment">// mark header length unreliable because tesseract might</span>
266
<a name="l00164"></a>00164 <span class="comment">// cast away the const and mutate the string directly.</span>
267
<a name="l00165"></a>00165 header->used_ = -1;
268
<a name="l00166"></a>00166 <span class="keywordflow">return</span> GetCStr();
269
<a name="l00167"></a>00167 }
270
<a name="l00168"></a>00168
271
<a name="l00169"></a><a class="code" href="a00557.html#a9956356f463fc7c5c55833542c1f255d">00169</a> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="a00557.html#a9956356f463fc7c5c55833542c1f255d">STRING::c_str</a>()<span class="keyword"> const </span>{
272
<a name="l00170"></a>00170 <span class="keywordflow">return</span> <a class="code" href="a00557.html#a32beee43ecab1bed8bebc3466896ad6e">string</a>();
273
<a name="l00171"></a>00171 }
274
<a name="l00172"></a>00172
275
<a name="l00173"></a>00173 <span class="comment">/******</span>
276
<a name="l00174"></a>00174 <span class="comment"> * The STRING_IS_PROTECTED interface adds additional support to migrate</span>
277
<a name="l00175"></a>00175 <span class="comment"> * code that needs to modify the STRING in ways not otherwise supported</span>
278
<a name="l00176"></a>00176 <span class="comment"> * without violating encapsulation.</span>
279
<a name="l00177"></a>00177 <span class="comment"> *</span>
280
<a name="l00178"></a>00178 <span class="comment"> * Also makes the [] operator return a const so it is immutable</span>
281
<a name="l00179"></a>00179 <span class="comment"> */</span>
282
<a name="l00180"></a>00180 <span class="preprocessor">#if STRING_IS_PROTECTED</span>
283
<a name="l00181"></a>00181 <span class="preprocessor"></span><span class="keyword">const</span> <span class="keywordtype">char</span>& <a class="code" href="a00557.html#a936654344db4a72af300d466b88b7aa8">STRING::operator[]</a>(<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index)<span class="keyword"> const </span>{
284
<a name="l00182"></a>00182 <span class="keywordflow">return</span> GetCStr()[index];
285
<a name="l00183"></a>00183 }
286
<a name="l00184"></a>00184
287
<a name="l00185"></a>00185 <span class="keywordtype">void</span> STRING::insert_range(<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index, <span class="keyword">const</span> <span class="keywordtype">char</span>* str, <span class="keywordtype">int</span> len) {
288
<a name="l00186"></a>00186 <span class="comment">// if index is outside current range, then also grow size of string</span>
289
<a name="l00187"></a>00187 <span class="comment">// to accmodate the requested range.</span>
290
<a name="l00188"></a>00188 STRING_HEADER* this_header = GetHeader();
291
<a name="l00189"></a>00189 <span class="keywordtype">int</span> used = this_header->used_;
292
<a name="l00190"></a>00190 <span class="keywordflow">if</span> (index > used)
293
<a name="l00191"></a>00191 used = index;
294
<a name="l00192"></a>00192
295
<a name="l00193"></a>00193 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(used + len + 1);
296
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (index < used) {
297
<a name="l00195"></a>00195 <span class="comment">// move existing string from index to '\0' inclusive.</span>
298
<a name="l00196"></a>00196 memmove(this_cstr + index + len,
299
<a name="l00197"></a>00197 this_cstr + index,
300
<a name="l00198"></a>00198 this_header->used_ - index);
301
<a name="l00199"></a>00199 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (len > 0) {
302
<a name="l00200"></a>00200 <span class="comment">// We are going to overwrite previous null terminator, so write the new one.</span>
303
<a name="l00201"></a>00201 this_cstr[this_header->used_ + len - 1] = <span class="charliteral">'\0'</span>;
304
<a name="l00202"></a>00202
305
<a name="l00203"></a>00203 <span class="comment">// If the old header did not have the terminator,</span>
306
<a name="l00204"></a>00204 <span class="comment">// then we need to account for it now that we've added it.</span>
307
<a name="l00205"></a>00205 <span class="comment">// Otherwise it was already accounted for; we just moved it.</span>
308
<a name="l00206"></a>00206 <span class="keywordflow">if</span> (this_header->used_ == 0)
309
<a name="l00207"></a>00207 ++this_header->used_;
310
<a name="l00208"></a>00208 }
311
<a name="l00209"></a>00209
312
<a name="l00210"></a>00210 <span class="comment">// Write new string to index.</span>
313
<a name="l00211"></a>00211 <span class="comment">// The string is already terminated from the conditions above.</span>
314
<a name="l00212"></a>00212 memcpy(this_cstr + index, str, len);
315
<a name="l00213"></a>00213 this_header->used_ += len;
316
<a name="l00214"></a>00214
317
<a name="l00215"></a>00215 assert(InvariantOk());
318
<a name="l00216"></a>00216 }
319
<a name="l00217"></a>00217
320
<a name="l00218"></a>00218 <span class="keywordtype">void</span> STRING::erase_range(<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index, <span class="keywordtype">int</span> len) {
321
<a name="l00219"></a>00219 <span class="keywordtype">char</span>* this_cstr = GetCStr();
322
<a name="l00220"></a>00220 STRING_HEADER* this_header = GetHeader();
323
<a name="l00221"></a>00221
324
<a name="l00222"></a>00222 memcpy(this_cstr+index, this_cstr+index+len,
325
<a name="l00223"></a>00223 this_header->used_ - index - len);
326
<a name="l00224"></a>00224 this_header->used_ -= len;
327
<a name="l00225"></a>00225 assert(InvariantOk());
328
<a name="l00226"></a>00226 }
329
<a name="l00227"></a>00227
330
<a name="l00228"></a>00228 <span class="preprocessor">#else</span>
331
<a name="l00229"></a><a class="code" href="a00557.html#a0d5a6c456f8e3ef4b4a5077031573df8">00229</a> <span class="preprocessor"></span><span class="keywordtype">void</span> <a class="code" href="a00557.html#a0d5a6c456f8e3ef4b4a5077031573df8">STRING::truncate_at</a>(<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index) {
332
<a name="l00230"></a>00230 <a class="code" href="a00823.html#a93a603f4063a6b9403d81caa245a583b">ASSERT_HOST</a>(index >= 0);
333
<a name="l00231"></a>00231 FixHeader();
334
<a name="l00232"></a>00232 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(index + 1);
335
<a name="l00233"></a>00233 this_cstr[index] = <span class="charliteral">'\0'</span>;
336
<a name="l00234"></a>00234 GetHeader()->used_ = index + 1;
337
<a name="l00235"></a>00235 assert(InvariantOk());
338
<a name="l00236"></a>00236 }
339
<a name="l00237"></a>00237
340
<a name="l00238"></a><a class="code" href="a00557.html#a936654344db4a72af300d466b88b7aa8">00238</a> <span class="keywordtype">char</span>& <a class="code" href="a00557.html#a936654344db4a72af300d466b88b7aa8">STRING::operator[]</a>(<a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> index)<span class="keyword"> const </span>{
341
<a name="l00239"></a>00239 <span class="comment">// Code is casting away this const and mutating the string,</span>
342
<a name="l00240"></a>00240 <span class="comment">// so mark used_ as -1 to flag it unreliable.</span>
343
<a name="l00241"></a>00241 GetHeader()->used_ = -1;
344
<a name="l00242"></a>00242 <span class="keywordflow">return</span> ((<span class="keywordtype">char</span> *)GetCStr())[index];
345
<a name="l00243"></a>00243 }
346
<a name="l00244"></a>00244 <span class="preprocessor">#endif</span>
347
<a name="l00245"></a>00245 <span class="preprocessor"></span>
348
<a name="l00246"></a><a class="code" href="a00557.html#a70cb880f818d4af4a4f4036032c3e9dc">00246</a> <span class="keywordtype">void</span> <a class="code" href="a00557.html#a70cb880f818d4af4a4f4036032c3e9dc">STRING::split</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> c, <a class="code" href="a00403.html">GenericVector<STRING></a> *splited) {
349
<a name="l00247"></a>00247 <span class="keywordtype">int</span> start_index = 0;
350
<a name="l00248"></a>00248 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < <a class="code" href="a00557.html#a168505a533eda60219c93e25adf4cdc5">length</a>(); i++) {
351
<a name="l00249"></a>00249 <span class="keywordflow">if</span> ((*<span class="keyword">this</span>)[i] == c) {
352
<a name="l00250"></a>00250 <span class="keywordflow">if</span> (i != start_index) {
353
<a name="l00251"></a>00251 (*this)[i] = <span class="charliteral">'\0'</span>;
354
<a name="l00252"></a>00252 <a class="code" href="a00557.html">STRING</a> tmp = GetCStr() + start_index;
355
<a name="l00253"></a>00253 splited-><a class="code" href="a00403.html#a0dc89fe2a365b04a61017f9d78c1a303">push_back</a>(tmp);
356
<a name="l00254"></a>00254 (*this)[i] = c;
357
<a name="l00255"></a>00255 }
358
<a name="l00256"></a>00256 start_index = i + 1;
359
<a name="l00257"></a>00257 }
360
<a name="l00258"></a>00258 }
361
<a name="l00259"></a>00259
362
<a name="l00260"></a>00260 <span class="keywordflow">if</span> (<a class="code" href="a00557.html#a168505a533eda60219c93e25adf4cdc5">length</a>() != start_index) {
363
<a name="l00261"></a>00261 <a class="code" href="a00557.html">STRING</a> tmp = GetCStr() + start_index;
364
<a name="l00262"></a>00262 splited-><a class="code" href="a00403.html#a0dc89fe2a365b04a61017f9d78c1a303">push_back</a>(tmp);
365
<a name="l00263"></a>00263 }
366
<a name="l00264"></a>00264 }
367
<a name="l00265"></a>00265
368
<a name="l00266"></a><a class="code" href="a00557.html#a69fa65451960a21d0555da5ae2cad9b2">00266</a> <a class="code" href="a00831.html#a7712a7e28433d0ade59219a129549b6f">BOOL8</a> <a class="code" href="a00557.html#a69fa65451960a21d0555da5ae2cad9b2">STRING::operator==</a>(<span class="keyword">const</span> <a class="code" href="a00557.html">STRING</a>& str)<span class="keyword"> const </span>{
369
<a name="l00267"></a>00267 FixHeader();
370
<a name="l00268"></a>00268 str.FixHeader();
371
<a name="l00269"></a>00269 <span class="keyword">const</span> STRING_HEADER* str_header = str.GetHeader();
372
<a name="l00270"></a>00270 <span class="keyword">const</span> STRING_HEADER* this_header = GetHeader();
373
<a name="l00271"></a>00271 <span class="keywordtype">int</span> this_used = this_header->used_;
374
<a name="l00272"></a>00272 <span class="keywordtype">int</span> str_used = str_header->used_;
375
<a name="l00273"></a>00273
376
<a name="l00274"></a>00274 <span class="keywordflow">return</span> (this_used == str_used)
377
<a name="l00275"></a>00275 && (memcmp(GetCStr(), str.GetCStr(), this_used) == 0);
378
<a name="l00276"></a>00276 }
379
<a name="l00277"></a>00277
380
<a name="l00278"></a><a class="code" href="a00557.html#a7de200e4b367759b370e9b610de05490">00278</a> <a class="code" href="a00831.html#a7712a7e28433d0ade59219a129549b6f">BOOL8</a> <a class="code" href="a00557.html#a7de200e4b367759b370e9b610de05490">STRING::operator!=</a>(<span class="keyword">const</span> <a class="code" href="a00557.html">STRING</a>& str)<span class="keyword"> const </span>{
381
<a name="l00279"></a>00279 FixHeader();
382
<a name="l00280"></a>00280 str.FixHeader();
383
<a name="l00281"></a>00281 <span class="keyword">const</span> STRING_HEADER* str_header = str.GetHeader();
384
<a name="l00282"></a>00282 <span class="keyword">const</span> STRING_HEADER* this_header = GetHeader();
385
<a name="l00283"></a>00283 <span class="keywordtype">int</span> this_used = this_header->used_;
386
<a name="l00284"></a>00284 <span class="keywordtype">int</span> str_used = str_header->used_;
387
<a name="l00285"></a>00285
388
<a name="l00286"></a>00286 <span class="keywordflow">return</span> (this_used != str_used)
389
<a name="l00287"></a>00287 || (memcmp(GetCStr(), str.GetCStr(), this_used) != 0);
390
<a name="l00288"></a>00288 }
391
<a name="l00289"></a>00289
392
<a name="l00290"></a><a class="code" href="a00557.html#ac6ed1c0f65f7fa05e2fea9e9d21b87d4">00290</a> <a class="code" href="a00831.html#a7712a7e28433d0ade59219a129549b6f">BOOL8</a> <a class="code" href="a00557.html#a7de200e4b367759b370e9b610de05490">STRING::operator!=</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* cstr)<span class="keyword"> const </span>{
393
<a name="l00291"></a>00291 FixHeader();
394
<a name="l00292"></a>00292 <span class="keyword">const</span> STRING_HEADER* this_header = GetHeader();
395
<a name="l00293"></a>00293
396
<a name="l00294"></a>00294 <span class="keywordflow">if</span> (cstr == NULL)
397
<a name="l00295"></a>00295 <span class="keywordflow">return</span> this_header->used_ > 1; <span class="comment">// either '\0' or NULL</span>
398
<a name="l00296"></a>00296 <span class="keywordflow">else</span> {
399
<a name="l00297"></a>00297 <a class="code" href="a00831.html#aba1f582fd0168f3ff9225d8c90fa9eb8">inT32</a> <a class="code" href="a00557.html#a168505a533eda60219c93e25adf4cdc5">length</a> = strlen(cstr) + 1;
400
<a name="l00298"></a>00298 <span class="keywordflow">return</span> (this_header->used_ != length)
401
<a name="l00299"></a>00299 || (memcmp(GetCStr(), cstr, length) != 0);
402
<a name="l00300"></a>00300 }
403
<a name="l00301"></a>00301 }
404
<a name="l00302"></a>00302
405
<a name="l00303"></a><a class="code" href="a00557.html#afcf3d146103695be14189118b7ddc2c8">00303</a> <a class="code" href="a00557.html">STRING</a>& <a class="code" href="a00557.html#a6db60c4e6e34865155a64e1b1fdca5cb">STRING::operator=</a>(<span class="keyword">const</span> <a class="code" href="a00557.html">STRING</a>& str) {
406
<a name="l00304"></a>00304 str.FixHeader();
407
<a name="l00305"></a>00305 <span class="keyword">const</span> STRING_HEADER* str_header = str.GetHeader();
408
<a name="l00306"></a>00306 <span class="keywordtype">int</span> str_used = str_header->used_;
409
<a name="l00307"></a>00307
410
<a name="l00308"></a>00308 GetHeader()->used_ = 0; <span class="comment">// clear since ensure doesnt need to copy data</span>
411
<a name="l00309"></a>00309 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(str_used);
412
<a name="l00310"></a>00310 STRING_HEADER* this_header = GetHeader();
413
<a name="l00311"></a>00311
414
<a name="l00312"></a>00312 memcpy(this_cstr, str.GetCStr(), str_used);
415
<a name="l00313"></a>00313 this_header->used_ = str_used;
416
<a name="l00314"></a>00314
417
<a name="l00315"></a>00315 assert(InvariantOk());
418
<a name="l00316"></a>00316 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
419
<a name="l00317"></a>00317 }
420
<a name="l00318"></a>00318
421
<a name="l00319"></a><a class="code" href="a00557.html#ab10c5d733cd8dd0c6245873032579214">00319</a> <a class="code" href="a00557.html">STRING</a> & <a class="code" href="a00557.html#af223fab2ff1f3ff775308cd615705b3f">STRING::operator+=</a>(<span class="keyword">const</span> <a class="code" href="a00557.html">STRING</a>& str) {
422
<a name="l00320"></a>00320 FixHeader();
423
<a name="l00321"></a>00321 str.FixHeader();
424
<a name="l00322"></a>00322 <span class="keyword">const</span> STRING_HEADER* str_header = str.GetHeader();
425
<a name="l00323"></a>00323 <span class="keyword">const</span> <span class="keywordtype">char</span>* str_cstr = str.GetCStr();
426
<a name="l00324"></a>00324 <span class="keywordtype">int</span> str_used = str_header->used_;
427
<a name="l00325"></a>00325 <span class="keywordtype">int</span> this_used = GetHeader()->used_;
428
<a name="l00326"></a>00326 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(this_used + str_used);
429
<a name="l00327"></a>00327
430
<a name="l00328"></a>00328 STRING_HEADER* this_header = GetHeader(); <span class="comment">// after ensure for realloc</span>
431
<a name="l00329"></a>00329
432
<a name="l00330"></a>00330 <span class="keywordflow">if</span> (this_used > 1) {
433
<a name="l00331"></a>00331 memcpy(this_cstr + this_used - 1, str_cstr, str_used);
434
<a name="l00332"></a>00332 this_header->used_ += str_used - 1; <span class="comment">// overwrite '\0'</span>
435
<a name="l00333"></a>00333 } <span class="keywordflow">else</span> {
436
<a name="l00334"></a>00334 memcpy(this_cstr, str_cstr, str_used);
437
<a name="l00335"></a>00335 this_header->used_ = str_used;
438
<a name="l00336"></a>00336 }
439
<a name="l00337"></a>00337
440
<a name="l00338"></a>00338 assert(InvariantOk());
441
<a name="l00339"></a>00339 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
442
<a name="l00340"></a>00340 }
443
<a name="l00341"></a>00341
444
<a name="l00342"></a><a class="code" href="a00557.html#a779cd637dd42d58d5500a3a657077e84">00342</a> <span class="keywordtype">void</span> <a class="code" href="a00557.html#a779cd637dd42d58d5500a3a657077e84">STRING::add_str_int</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* str, <span class="keywordtype">int</span> number) {
445
<a name="l00343"></a>00343 <span class="keywordflow">if</span> (str != NULL)
446
<a name="l00344"></a>00344 *<span class="keyword">this</span> += str;
447
<a name="l00345"></a>00345 <span class="comment">// Allow space for the maximum possible length of inT64.</span>
448
<a name="l00346"></a>00346 <span class="keywordtype">char</span> num_buffer[<a class="code" href="a00854.html#a98ff26a02a0502569b1676ed30fb1b40">kMaxIntSize</a>];
449
<a name="l00347"></a>00347 snprintf(num_buffer, <a class="code" href="a00854.html#a98ff26a02a0502569b1676ed30fb1b40">kMaxIntSize</a> - 1, <span class="stringliteral">"%d"</span>, number);
450
<a name="l00348"></a>00348 num_buffer[<a class="code" href="a00854.html#a98ff26a02a0502569b1676ed30fb1b40">kMaxIntSize</a> - 1] = <span class="charliteral">'\0'</span>;
451
<a name="l00349"></a>00349 *<span class="keyword">this</span> += num_buffer;
452
<a name="l00350"></a>00350 }
453
<a name="l00351"></a>00351 <span class="comment">// Appends the given string and double (as a %.8g) to this.</span>
454
<a name="l00352"></a><a class="code" href="a00557.html#a8b89aab090bf94ed9e0b05625ec6a397">00352</a> <span class="keywordtype">void</span> <a class="code" href="a00557.html#a8b89aab090bf94ed9e0b05625ec6a397">STRING::add_str_double</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* str, <span class="keywordtype">double</span> number) {
455
<a name="l00353"></a>00353 <span class="keywordflow">if</span> (str != NULL)
456
<a name="l00354"></a>00354 *<span class="keyword">this</span> += str;
457
<a name="l00355"></a>00355 <span class="comment">// Allow space for the maximum possible length of %8g.</span>
458
<a name="l00356"></a>00356 <span class="keywordtype">char</span> num_buffer[<a class="code" href="a00854.html#af3b99544fb662fce123799a16b6050b5">kMaxDoubleSize</a>];
459
<a name="l00357"></a>00357 snprintf(num_buffer, <a class="code" href="a00854.html#af3b99544fb662fce123799a16b6050b5">kMaxDoubleSize</a> - 1, <span class="stringliteral">"%.8g"</span>, number);
460
<a name="l00358"></a>00358 num_buffer[<a class="code" href="a00854.html#af3b99544fb662fce123799a16b6050b5">kMaxDoubleSize</a> - 1] = <span class="charliteral">'\0'</span>;
461
<a name="l00359"></a>00359 *<span class="keyword">this</span> += num_buffer;
462
<a name="l00360"></a>00360 }
463
<a name="l00361"></a>00361
464
<a name="l00362"></a><a class="code" href="a00557.html#a6db60c4e6e34865155a64e1b1fdca5cb">00362</a> <a class="code" href="a00557.html">STRING</a> & <a class="code" href="a00557.html#a6db60c4e6e34865155a64e1b1fdca5cb">STRING::operator=</a>(<span class="keyword">const</span> <span class="keywordtype">char</span>* cstr) {
465
<a name="l00363"></a>00363 STRING_HEADER* this_header = GetHeader();
466
<a name="l00364"></a>00364 <span class="keywordflow">if</span> (cstr) {
467
<a name="l00365"></a>00365 <span class="keywordtype">int</span> len = strlen(cstr) + 1;
468
<a name="l00366"></a>00366
469
<a name="l00367"></a>00367 this_header->used_ = 0; <span class="comment">// dont bother copying data if need to realloc</span>
470
<a name="l00368"></a>00368 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(len);
471
<a name="l00369"></a>00369 this_header = GetHeader(); <span class="comment">// for realloc</span>
472
<a name="l00370"></a>00370 memcpy(this_cstr, cstr, len);
473
<a name="l00371"></a>00371 this_header->used_ = len;
474
<a name="l00372"></a>00372 } <span class="keywordflow">else</span> {
475
<a name="l00373"></a>00373 <span class="comment">// Reallocate to same state as default constructor.</span>
476
<a name="l00374"></a>00374 DiscardData();
477
<a name="l00375"></a>00375 <span class="comment">// Empty STRINGs contain just the "\0".</span>
478
<a name="l00376"></a>00376 memcpy(AllocData(1, <a class="code" href="a00854.html#a927f7d5b361de249344c06b29aa6ca27">kMinCapacity</a>), <span class="stringliteral">""</span>, 1);
479
<a name="l00377"></a>00377 }
480
<a name="l00378"></a>00378
481
<a name="l00379"></a>00379 assert(InvariantOk());
482
<a name="l00380"></a>00380 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
483
<a name="l00381"></a>00381 }
484
<a name="l00382"></a>00382
485
<a name="l00383"></a><a class="code" href="a00557.html#a8cfe836a7f55f4761936ea2231b6b9d2">00383</a> <span class="keywordtype">void</span> <a class="code" href="a00557.html#a8cfe836a7f55f4761936ea2231b6b9d2">STRING::assign</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *cstr, <span class="keywordtype">int</span> len) {
486
<a name="l00384"></a>00384 STRING_HEADER* this_header = GetHeader();
487
<a name="l00385"></a>00385 this_header->used_ = 0; <span class="comment">// dont bother copying data if need to realloc</span>
488
<a name="l00386"></a>00386 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(len + 1); <span class="comment">// +1 for '\0'</span>
489
<a name="l00387"></a>00387
490
<a name="l00388"></a>00388 this_header = GetHeader(); <span class="comment">// for realloc</span>
491
<a name="l00389"></a>00389 memcpy(this_cstr, cstr, len);
492
<a name="l00390"></a>00390 this_cstr[len] = <span class="charliteral">'\0'</span>;
493
<a name="l00391"></a>00391 this_header->used_ = len + 1;
494
<a name="l00392"></a>00392
495
<a name="l00393"></a>00393 assert(InvariantOk());
496
<a name="l00394"></a>00394 }
497
<a name="l00395"></a>00395
498
<a name="l00396"></a><a class="code" href="a00557.html#a7072304f2deae96e520b93b44a37424b">00396</a> <a class="code" href="a00557.html">STRING</a> <a class="code" href="a00557.html#a7072304f2deae96e520b93b44a37424b">STRING::operator+</a>(<span class="keyword">const</span> <a class="code" href="a00557.html">STRING</a>& str)<span class="keyword"> const </span>{
499
<a name="l00397"></a>00397 <a class="code" href="a00557.html">STRING</a> result(*<span class="keyword">this</span>);
500
<a name="l00398"></a>00398 result += str;
501
<a name="l00399"></a>00399
502
<a name="l00400"></a>00400 assert(InvariantOk());
503
<a name="l00401"></a>00401 <span class="keywordflow">return</span> result;
504
<a name="l00402"></a>00402 }
505
<a name="l00403"></a>00403
506
<a name="l00404"></a>00404
507
<a name="l00405"></a><a class="code" href="a00557.html#a8313e59dfb842b027a228d4444ee2a55">00405</a> <a class="code" href="a00557.html">STRING</a> <a class="code" href="a00557.html#a7072304f2deae96e520b93b44a37424b">STRING::operator+</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> ch)<span class="keyword"> const </span>{
508
<a name="l00406"></a>00406 <a class="code" href="a00557.html">STRING</a> result;
509
<a name="l00407"></a>00407 FixHeader();
510
<a name="l00408"></a>00408 <span class="keyword">const</span> STRING_HEADER* this_header = GetHeader();
511
<a name="l00409"></a>00409 <span class="keywordtype">int</span> this_used = this_header->used_;
512
<a name="l00410"></a>00410 <span class="keywordtype">char</span>* result_cstr = result.ensure_cstr(this_used + 1);
513
<a name="l00411"></a>00411 STRING_HEADER* result_header = result.GetHeader();
514
<a name="l00412"></a>00412 <span class="keywordtype">int</span> result_used = result_header->used_;
515
<a name="l00413"></a>00413
516
<a name="l00414"></a>00414 <span class="comment">// copies '\0' but we'll overwrite that</span>
517
<a name="l00415"></a>00415 memcpy(result_cstr, GetCStr(), this_used);
518
<a name="l00416"></a>00416 result_cstr[result_used] = ch; <span class="comment">// overwrite old '\0'</span>
519
<a name="l00417"></a>00417 result_cstr[result_used + 1] = <span class="charliteral">'\0'</span>; <span class="comment">// append on '\0'</span>
520
<a name="l00418"></a>00418 ++result_header->used_;
521
<a name="l00419"></a>00419
522
<a name="l00420"></a>00420 assert(InvariantOk());
523
<a name="l00421"></a>00421 <span class="keywordflow">return</span> result;
524
<a name="l00422"></a>00422 }
525
<a name="l00423"></a>00423
526
<a name="l00424"></a>00424
527
<a name="l00425"></a><a class="code" href="a00557.html#af223fab2ff1f3ff775308cd615705b3f">00425</a> <a class="code" href="a00557.html">STRING</a>& <a class="code" href="a00557.html#af223fab2ff1f3ff775308cd615705b3f">STRING::operator+=</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *str) {
528
<a name="l00426"></a>00426 <span class="keywordflow">if</span> (!str || !*str) <span class="comment">// empty string has no effect</span>
529
<a name="l00427"></a>00427 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
530
<a name="l00428"></a>00428
531
<a name="l00429"></a>00429 FixHeader();
532
<a name="l00430"></a>00430 <span class="keywordtype">int</span> len = strlen(str) + 1;
533
<a name="l00431"></a>00431 <span class="keywordtype">int</span> this_used = GetHeader()->used_;
534
<a name="l00432"></a>00432 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(this_used + len);
535
<a name="l00433"></a>00433 STRING_HEADER* this_header = GetHeader(); <span class="comment">// after ensure for realloc</span>
536
<a name="l00434"></a>00434
537
<a name="l00435"></a>00435 <span class="comment">// if we had non-empty string then append overwriting old '\0'</span>
538
<a name="l00436"></a>00436 <span class="comment">// otherwise replace</span>
539
<a name="l00437"></a>00437 <span class="keywordflow">if</span> (this_used > 0) {
540
<a name="l00438"></a>00438 memcpy(this_cstr + this_used - 1, str, len);
541
<a name="l00439"></a>00439 this_header->used_ += len - 1;
542
<a name="l00440"></a>00440 } <span class="keywordflow">else</span> {
543
<a name="l00441"></a>00441 memcpy(this_cstr, str, len);
544
<a name="l00442"></a>00442 this_header->used_ = len;
545
<a name="l00443"></a>00443 }
546
<a name="l00444"></a>00444
547
<a name="l00445"></a>00445 assert(InvariantOk());
548
<a name="l00446"></a>00446 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
549
<a name="l00447"></a>00447 }
550
<a name="l00448"></a>00448
551
<a name="l00449"></a>00449
552
<a name="l00450"></a><a class="code" href="a00557.html#a5f9408cef7ba8108ba67bd7086f07dde">00450</a> <a class="code" href="a00557.html">STRING</a>& <a class="code" href="a00557.html#af223fab2ff1f3ff775308cd615705b3f">STRING::operator+=</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> ch) {
553
<a name="l00451"></a>00451 <span class="keywordflow">if</span> (ch == <span class="charliteral">'\0'</span>)
554
<a name="l00452"></a>00452 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
555
<a name="l00453"></a>00453
556
<a name="l00454"></a>00454 FixHeader();
557
<a name="l00455"></a>00455 <span class="keywordtype">int</span> this_used = GetHeader()->used_;
558
<a name="l00456"></a>00456 <span class="keywordtype">char</span>* this_cstr = ensure_cstr(this_used + 1);
559
<a name="l00457"></a>00457 STRING_HEADER* this_header = GetHeader();
560
<a name="l00458"></a>00458
561
<a name="l00459"></a>00459 <span class="keywordflow">if</span> (this_used > 0)
562
<a name="l00460"></a>00460 --this_used; <span class="comment">// undo old empty null if there was one</span>
563
<a name="l00461"></a>00461
564
<a name="l00462"></a>00462 this_cstr[this_used++] = ch; <span class="comment">// append ch to end</span>
565
<a name="l00463"></a>00463 this_cstr[this_used++] = <span class="charliteral">'\0'</span>; <span class="comment">// append '\0' after ch</span>
566
<a name="l00464"></a>00464 this_header->used_ = this_used;
567
<a name="l00465"></a>00465
568
<a name="l00466"></a>00466 assert(InvariantOk());
569
<a name="l00467"></a>00467 <span class="keywordflow">return</span> *<span class="keyword">this</span>;
570
<a name="l00468"></a>00468 }
571
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<li class="navelem"><a class="el" href="a00854.html">strngs.cpp</a> </li>
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<li class="footer">Generated on Mon Feb 3 2014 10:59:08 for tesseract by
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593
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.6.1 </li>
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