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<hr><h1>utf8utf16.cpp</h1><div class="fragment"><pre>00001 <font class="comment">/******************************************************************************</font>
00002 <font class="comment"> *</font>
00003 <font class="comment"> * UTF8UTF16 - SWFilter decendant to convert UTF-8 to UTF-16</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 <utf8utf16.h></font>
00011
00012 UTF8UTF16::UTF8UTF16() {
00013 }
00014
00015
00016 <font class="keywordtype">char</font> UTF8UTF16::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 <font class="keywordtype">unsigned</font> <font class="keywordtype">short</font> schar;
00025
00026 len = strlen(text) + 1; <font class="comment">// shift string to right of buffer</font>
00027 <font class="keywordflow">if</font> (len < maxlen) {
00028 memmove(&text[maxlen - len], text, len);
00029 from = (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)&text[maxlen - len];
00030 }
00031 <font class="keywordflow">else</font>
00032 from = (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>*)text;
00033
00034
00035 <font class="comment">// -------------------------------</font>
00036
00037 <font class="keywordflow">for</font> (to = (<font class="keywordtype">unsigned</font> <font class="keywordtype">short</font>*)text; *from; from++) {
00038 uchar = 0;
00039 <font class="keywordflow">if</font> ((*from & 128) != 128) {
00040 <font class="comment">// if (*from != ' ')</font>
00041 uchar = *from;
00042 }
00043 <font class="keywordflow">else</font> <font class="keywordflow">if</font> ((*from & 128) && ((*from & 64) != 64)) {
00044 <font class="comment">// error, do nothing</font>
00045 <font class="keywordflow">continue</font>;
00046 }
00047 <font class="keywordflow">else</font> {
00048 *from <<= 1;
00049 <font class="keywordflow">for</font> (subsequent = 1; (*from & 128); subsequent++) {
00050 *from <<= 1;
00051 from[subsequent] &= 63;
00052 uchar <<= 6;
00053 uchar |= from[subsequent];
00054 }
00055 subsequent--;
00056 *from <<=1;
00057 significantFirstBits = 8 - (2+subsequent);
00058
00059 uchar |= (((short)*from) << (((6*subsequent)+significantFirstBits)-8));
00060 from += subsequent;
00061 }
00062
00063 <font class="keywordflow">if</font> (uchar < 0x1ffff) {
00064 *to++ = (<font class="keywordtype">unsigned</font> <font class="keywordtype">short</font>)uchar;
00065 }
00066 <font class="keywordflow">else</font> {
00067 uchar -= 0x10000;
00068 schar = 0xD800 | (uchar & 0x03ff);
00069 uchar >>= 10;
00070 uchar |= 0xDC00;
00071 *to++ = (<font class="keywordtype">unsigned</font> <font class="keywordtype">short</font>)schar;
00072 *to++ = (<font class="keywordtype">unsigned</font> <font class="keywordtype">short</font>)uchar;
00073 }
00074 }
00075 *to = (<font class="keywordtype">unsigned</font> <font class="keywordtype">short</font>)0;
00076
00077 <font class="keywordflow">return</font> 0;
00078 }
00079
</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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