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<hr><h1>utf8latin1.cpp</h1><div class="fragment"><pre>00001 <font class="comment">/******************************************************************************</font>
00002 <font class="comment"> *</font>
00003 <font class="comment"> * UTF8Latin1 - SWFilter decendant to convert UTF-8 to Latin-1</font>
00004 <font class="comment"> *</font>
00005 <font class="comment"> */</font>
00006
00007 <font class="preprocessor">#include <stdlib.h></font>
00008 <font class="preprocessor">#include <stdio.h></font>
00009
00010 <font class="preprocessor">#include <utf8latin1.h></font>
00011
00012 UTF8Latin1::UTF8Latin1(<font class="keywordtype">char</font> rchar) : replacementChar(rchar) {
00013 }
00014
00015
00016 <font class="keywordtype">char</font> UTF8Latin1::ProcessText(<font class="keywordtype">char</font> *text, <font class="keywordtype">int</font> maxlen, <font class="keyword">const</font> <a class="code" href="class_s_w_key.html">SWKey</a> *key, <font class="keyword">const</font> <a class="code" href="class_s_w_module.html">SWModule</a> *module)
00017 {
00018 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> *from;
00019 <font class="keywordtype">unsigned</font> <font class="keywordtype">short</font> *to;
00020
00021 <font class="keywordtype">int</font> len;
00022 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> uchar;
00023 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> significantFirstBits, subsequent;
00024
00025 len = strlen(text) + 1; <font class="comment">// shift string to right of buffer</font>
00026 <font class="keywordflow">if</font> (len < maxlen) {
00027 memmove(&text[maxlen - len], text, len);
00028 from = (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)&text[maxlen - len];
00029 }
00030 <font class="keywordflow">else</font>
00031 from = (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)text;
00032
00033
00034 <font class="comment">// -------------------------------</font>
00035
00036 <font class="keywordflow">for</font> (to = (<font class="keywordtype">unsigned</font> <font class="keywordtype">short</font>*)text; *from; from++) {
00037 uchar = 0;
00038 <font class="keywordflow">if</font> ((*from & 128) != 128) {
00039 <font class="comment">// if (*from != ' ')</font>
00040 uchar = *from;
00041 }
00042 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((*from & 128) && ((*from & 64) != 64)) {
00043 <font class="comment">// error, do nothing</font>
00044 <font class="keywordflow">continue</font>;
00045 }
00046 <font class="keywordflow">else</font> {
00047 *from <<= 1;
00048 <font class="keywordflow">for</font> (subsequent = 1; (*from & 128); subsequent++) {
00049 *from <<= 1;
00050 from[subsequent] &= 63;
00051 uchar <<= 6;
00052 uchar |= from[subsequent];
00053 }
00054 subsequent--;
00055 *from <<=1;
00056 significantFirstBits = 8 - (2+subsequent);
00057
00058 uchar |= (((short)*from) << (((6*subsequent)+significantFirstBits)-8));
00059 from += subsequent;
00060 }
00061
00062 <font class="keywordflow">if</font> (uchar < 0xff) {
00063 *to++ = (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>)uchar;
00064 }
00065 <font class="keywordflow">else</font> {
00066 *to++ = replacementChar;
00067 }
00068 }
00069 *to++ = 0;
00070 *to = 0;
00071
00072 <font class="keywordflow">return</font> 0;
00073 }
00074
</pre></div><hr><address align="right"><small>Generated on Thu Jun 20 22:13:01 2002 for The Sword Project by
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