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<hr><h1>swunicod.cpp</h1><div class="fragment"><pre>00001 <font class="comment">/*</font>
00002 <font class="comment"> *</font>
00003 <font class="comment"> * Copyright 1998 CrossWire Bible Society (http://www.crosswire.org)</font>
00004 <font class="comment"> * CrossWire Bible Society</font>
00005 <font class="comment"> * P. O. Box 2528</font>
00006 <font class="comment"> * Tempe, AZ 85280-2528</font>
00007 <font class="comment"> *</font>
00008 <font class="comment"> * This program is free software; you can redistribute it and/or modify it</font>
00009 <font class="comment"> * under the terms of the GNU General Public License as published by the</font>
00010 <font class="comment"> * Free Software Foundation version 2.</font>
00011 <font class="comment"> *</font>
00012 <font class="comment"> * This program is distributed in the hope that it will be useful, but</font>
00013 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00014 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00015 <font class="comment"> * General Public License for more details.</font>
00016 <font class="comment"> *</font>
00017 <font class="comment"> */</font>
00018
00019 <font class="preprocessor">#include "swunicod.h"</font>
00020 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font>* UTF32to8 (<font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> utf32, <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> * utf8) {
00021 <font class="keywordtype">unsigned</font> <font class="keywordtype">int</font> i;
00022 <font class="keywordflow">for</font> (i = 0; i < 6; i++) utf8[i] = 0;
00023
00024 <font class="keywordflow">if</font> (utf32 < 0x80) {
00025 utf8[0] = (char)utf32;
00026 }
00027 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (utf32 < 0x800) {
00028 i = utf32 & 0x3f;
00029 utf8[1] = 0x80 | i;
00030 utf32 >>= 6;
00031
00032 i = utf32 & 0x1f;
00033 utf8[0] = 0xc0 | i;
00034 }
00035 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (utf32 < 0x10000) {
00036 i = utf32 & 0x3f;
00037 utf8[2] = 0x80 | i;
00038 utf32 >>= 6;
00039
00040 i = utf32 & 0x3f;
00041 utf8[1] = 0x80 | i;
00042 utf32 >>= 6;
00043
00044 i = utf32 & 0x0f;
00045 utf8[0] = 0xe0 | i;
00046 }
00047 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (utf32 < 0x200000) {
00048 i = utf32 & 0x3f;
00049 utf8[3] = 0x80 | i;
00050 utf32 >>= 6;
00051
00052 i = utf32 & 0x3f;
00053 utf8[2] = 0x80 | i;
00054 utf32 >>= 6;
00055
00056 i = utf32 & 0x3f;
00057 utf8[1] = 0x80 | i;
00058 utf32 >>= 6;
00059
00060 i = utf32 & 0x07;
00061 utf8[0] = 0xf0 | i;
00062 }
00063 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (utf32 < 0x4000000) {
00064 i = utf32 & 0x3f;
00065 utf8[4] = 0x80 | i;
00066 utf32 >>= 6;
00067
00068 i = utf32 & 0x3f;
00069 utf8[3] = 0x80 | i;
00070 utf32 >>= 6;
00071
00072 i = utf32 & 0x3f;
00073 utf8[2] = 0x80 | i;
00074 utf32 >>= 6;
00075
00076 i = utf32 & 0x3f;
00077 utf8[1] = 0x80 | i;
00078 utf32 >>= 6;
00079
00080 i = utf32 & 0x03;
00081 utf8[0] = 0xf8 | i;
00082 }
00083 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (utf32 < 0x80000000) {
00084 i = utf32 & 0x3f;
00085 utf8[5] = 0x80 | i;
00086 utf32 >>= 6;
00087
00088 i = utf32 & 0x3f;
00089 utf8[4] = 0x80 | i;
00090 utf32 >>= 6;
00091
00092 i = utf32 & 0x3f;
00093 utf8[3] = 0x80 | i;
00094 utf32 >>= 6;
00095
00096 i = utf32 & 0x3f;
00097 utf8[2] = 0x80 | i;
00098 utf32 >>= 6;
00099
00100 i = utf32 & 0x3f;
00101 utf8[1] = 0x80 | i;
00102 utf32 >>= 6;
00103
00104 i = utf32 & 0x01;
00105 utf8[0] = 0xfc | i;
00106 }
00107 <font class="keywordflow">return</font> utf8;
00108 }
00109
00114 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> UTF8to32 (<font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> * utf8) {
00115
00116 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> i = utf8[0];
00117 <font class="keywordtype">unsigned</font> <font class="keywordtype">char</font> count;
00118 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> utf32 = 0;
00119
00120 <font class="keywordflow">for</font> (count = 0; i & 0x80; count++) i <<= 1;
00121 <font class="keywordflow">if</font> (!count) {
00122 <font class="keywordflow">return</font> utf8[0];
00123 }
00124 <font class="keywordflow">else</font> <font class="keywordflow">if</font> (count == 1) {
00125 <font class="keywordflow">return</font> 0xffff;
00126 }
00127 <font class="keywordflow">else</font> {
00128 count--;
00129 utf32 = i >> count;
00130 <font class="keywordflow">for</font> (i = 1; i <= count; i++) {
00131 <font class="keywordflow">if</font> (0xc0 & utf8[i] != 0x80) {
00132 <font class="keywordflow">return</font> 0xffff;
00133 }
00134 utf32 <<= 6;
00135 utf32 |= (utf8[i] & 0x3f);
00136 }
00137 }
00138 <font class="keywordflow">return</font> utf32;
00139 }
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