1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
|
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<HTML>
<HEAD>
<TITLE>nevrax.org : docs</TITLE>
<LINK REL=stylesheet TYPE="text/css" HREF="/inc/css/nevrax.css">
<link href="doxygen.css" rel="stylesheet" type="text/css">
</HEAD>
<BODY MARGINHEIGHT="0" MARGINWIDTH="0">
<!-- uplinks -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0>
<TR>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD WIDTH=140 BGCOLOR=#dddddd><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD><IMG width=6 height=14 SRC="/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle> <A CLASS=uplinks HREF='/'><b>Home</B></FONT></A> </TD>
<TD><IMG width=6 height=14 SRC="/inc/img/reddots.gif" ALT="#" VSPACE=2 HSPACE=2 BORDER=0 ></TD><TD VALIGN=middle> <A CLASS=uplinks HREF='/'><b>nevrax.com</B></FONT></A> </TD>
</TR>
</TABLE>
<!-- banner Nevrax -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0 WIDTH=100%>
<TR><TD BGCOLOR="#000000" BACKGROUND="/inc/img/black_banner.jpg"><A HREF=""><IMG SRC="/inc/img/nevrax.gif" WIDTH="170" HEIGHT="45" BORDER=0 ALT="Nevrax" ></A></TD></TR>
</TABLE>
<!-- main table -->
<TABLE CELLSPACING=0 CELLPADDING=0 BORDER=0 height=100%>
<TR>
<TD WIDTH=16><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="10" BORDER=0 ALT=""></TD>
<TD WIDTH=140 BGCOLOR=#dddddd VALIGN=TOP ALIGN=middle><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">
<!------ Begin Box ------>
<TABLE BORDER=0 CELLSPACING=0 CELLPADDING=0 BGCOLOR=black><TR><TD><TABLE border=0 cellspacing=2 cellpadding=0 width=120><tr><TD ALIGN=middle bgcolor=black>
<FONT COLOR=white FACE="sans-serif"><B>Nevrax.org</B></FONT></TD></TR><tr><td colspan=2 bgcolor=#FFFFFF>
<TABLE cellspacing=0 cellpadding=1 border=0>
<tr><td ALIGN=middle><a class='linkbox' href="/news/" TITLE="Rubrique news"><img width=13 height=15 hspace=5 border=0 src=/inc/img/picto-news.gif ALT=#></A></td><td><a class='linkbox' href="/news/" TITLE="News">News</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/mail/" TITLE="Rubrique mail"><img width=15 height=11 hspace=5 border=0 src=/inc/img/picto-mail.gif ALT=#></A></td><td><a class='linkbox' href="/mail/" TITLE="Mailing list archive">Mailing-list</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/docs/" TITLE="Rubrique docs"><img width=14 height=16 hspace=5 border=0 src=/inc/img/picto-docs.gif ALT=#></A></td><td><a class='linkbox' href="/docs/" TITLE="Documentation">Documentation</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/cvs/" TITLE="Rubrique cvs"><img width=13 height=17 hspace=5 border=0 src=/inc/img/picto-cvs.gif ALT=#></A></td><td><a class='linkbox' href="/cvs/" TITLE="CVS Web">CVS</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/bugs/" TITLE="Rubrique bugs"><img width=20 height=16 hspace=5 border=0 src=/inc/img/picto-bugs.gif ALT=#></A></td><td><a class='linkbox' href="/bugs/" TITLE="Bugtracking">Bugs</a></td></tr>
<tr><td ALIGN=middle><a class='linkbox' href="/GPL.php3" TITLE="Rubrique license"><img width=18 height=12 hspace=5 border=0 src=/inc/img/picto-gpl.gif ALT=#></A></td><td><a class='linkbox' href="/GPL.php3" TITLE="License">License</a></td></tr>
</TABLE>
</TD></TR></TABLE></TD></TR></TABLE>
<!------ End Box ------>
</TD>
<TD WIDTH=15><IMG SRC="/inc/img/pixel.gif" WIDTH="16" HEIGHT="16" BORDER=0 ALT=""></TD>
<TD ALIGN=left valign=top><IMG SRC="/inc/img/pixel.gif" WIDTH="140" HEIGHT="10" BORDER=0 ALT="">
<!-- title -->
<TABLE background="/inc/img/redline.gif" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td>
<A HREF="/docs/"><img src="/inc/img/t_docs.gif" ALT="Docs" HEIGHT=20 BORDER=0></A>
</td><td><IMG SRC="/inc/img/pixel.gif" WIDTH="1" HEIGHT="1" BORDER=0 ALT="">
</td></tr></table>
<!-- block -->
<TABLE bgcolor="#dddddd" CELLSPACING=0 CELLPADDING=0 BORDER=0 width=100%><tr><td width=1% valign=middle><img width=6 height=14 hspace=2 vspace=2 src="/inc/img/reddots.gif"></TD>
<TD><B>Documentation</B></TD>
<TD ALIGN=RIGHT> </td>
</tr></table>
<!-- Generated by Doxygen 1.2.14 -->
<center>
<a class="qindex" href="index.html">Main Page</a> <a class="qindex" href="namespaces.html">Namespace List</a> <a class="qindex" href="hierarchy.html">Class Hierarchy</a> <a class="qindex" href="classes.html">Alphabetical List</a> <a class="qindex" href="annotated.html">Compound List</a> <a class="qindex" href="files.html">File List</a> <a class="qindex" href="namespacemembers.html">Namespace Members</a> <a class="qindex" href="functions.html">Compound Members</a> <a class="qindex" href="globals.html">File Members</a> <a class="qindex" href="pages.html">Related Pages</a> <a class="qindexRef" doxygen="_cgi:/cgi-bin/nel-search.cgi" href="/cgi-bin/nel-search.cgi">Search</a> </center>
<hr><h1>radix_sort.h</h1><a href="radix__sort_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001
00007 <font class="comment">/* Copyright, 2001 Nevrax Ltd.</font>
00008 <font class="comment"> *</font>
00009 <font class="comment"> * This file is part of NEVRAX NEL.</font>
00010 <font class="comment"> * NEVRAX NEL is free software; you can redistribute it and/or modify</font>
00011 <font class="comment"> * it under the terms of the GNU General Public License as published by</font>
00012 <font class="comment"> * the Free Software Foundation; either version 2, or (at your option)</font>
00013 <font class="comment"> * any later version.</font>
00014 <font class="comment"></font>
00015 <font class="comment"> * NEVRAX NEL is distributed in the hope that it will be useful, but</font>
00016 <font class="comment"> * WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00017 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00018 <font class="comment"> * General Public License for more details.</font>
00019 <font class="comment"></font>
00020 <font class="comment"> * You should have received a copy of the GNU General Public License</font>
00021 <font class="comment"> * along with NEVRAX NEL; see the file COPYING. If not, write to the</font>
00022 <font class="comment"> * Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,</font>
00023 <font class="comment"> * MA 02111-1307, USA.</font>
00024 <font class="comment"> */</font>
00025
00026 <font class="preprocessor">#ifndef NL_RADIX_SORT_H</font>
00027 <font class="preprocessor"></font><font class="preprocessor">#define NL_RADIX_SORT_H</font>
00028 <font class="preprocessor"></font>
00029 <font class="preprocessor">#include "<a class="code" href="types__nl_8h.html">nel/misc/types_nl.h</a>"</font>
00030 <font class="preprocessor">#include "<a class="code" href="common_8h.html">nel/misc/common.h</a>"</font>
00031
00032
00033 <font class="keyword">namespace </font>NL3D {
00034
00035
00036 <font class="comment">// ***************************************************************************</font>
<a name="l00049"></a><a class="code" href="classNL3D_1_1CRadixSort.html">00049</a> <font class="comment"></font><font class="keyword">template</font><<font class="keyword">class</font> T> <font class="keyword">class </font>CRadixSort
00050 {
00051 <font class="keyword">public</font>:
00052
<a name="l00062"></a><a class="code" href="classNL3D_1_1CRadixSort.html#a0">00062</a> <a class="code" href="classNL3D_1_1CRadixSort.html#a0">CRadixSort</a>(uint keyDepth= 32, uint digitDepth= 8)
00063 {
00064 <font class="comment">// setup</font>
00065 <a class="code" href="classNL3D_1_1CRadixSort.html#o0">_KeyDepth</a>= keyDepth;
00066 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(<a class="code" href="classNL3D_1_1CRadixSort.html#o0">_KeyDepth</a>, 1U, 32U);
00067 <a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a>= digitDepth;
00068 <a class="code" href="namespaceNLMISC.html#a215">NLMISC::clamp</a>(<a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a>, 1U, 16U);
00069 <a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a>= <a class="code" href="bit__set_8cpp.html#a0">std::min</a>(<a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a>, <a class="code" href="classNL3D_1_1CRadixSort.html#o0">_KeyDepth</a>);
00070
00071 <font class="comment">// resize the array of digits.</font>
00072 <a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a>= 1<<<a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a>;
00073 <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>.resize(<a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a>);
00074 }
00075
<a name="l00084"></a><a class="code" href="classNL3D_1_1CRadixSort.html#a1">00084</a> T *<a class="code" href="classNL3D_1_1CRadixSort.html#a1">sort</a>(T *array0, T *array1, uint size) {<font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CRadixSort.html#c0">doSort</a>(array0, array1, size, <font class="keyword">true</font>);}
00085
00086
<a name="l00090"></a><a class="code" href="classNL3D_1_1CRadixSort.html#a2">00090</a> T *<a class="code" href="classNL3D_1_1CRadixSort.html#a2">reverse_sort</a>(T *array0, T *array1, uint size) {<font class="keywordflow">return</font> <a class="code" href="classNL3D_1_1CRadixSort.html#c0">doSort</a>(array0, array1, size, <font class="keyword">false</font>);}
00091
00092
00093 <font class="comment">// ***********************</font>
00094 <font class="keyword">private</font>:
00095
<a name="l00096"></a><a class="code" href="structNL3D_1_1CRadixSort_1_1CSortDigit.html">00096</a> <font class="keyword">struct </font>CSortDigit
00097 {
00098 <font class="comment">// For a digit, how many elements it has in the array.</font>
<a name="l00099"></a><a class="code" href="structNL3D_1_1CRadixSort_1_1CSortDigit.html#m0">00099</a> uint <a class="code" href="structNL3D_1_1CRadixSort_1_1CSortDigit.html#m0">Count</a>;
00100 <font class="comment">// current ptr where to write in destArray</font>
<a name="l00101"></a><a class="code" href="structNL3D_1_1CRadixSort_1_1CSortDigit.html#m1">00101</a> T *<a class="code" href="structNL3D_1_1CRadixSort_1_1CSortDigit.html#m1">Ptr</a>;
00102 };
00103
00104 <font class="comment">// setup</font>
<a name="l00105"></a><a class="code" href="classNL3D_1_1CRadixSort.html#o0">00105</a> uint <a class="code" href="classNL3D_1_1CRadixSort.html#o0">_KeyDepth</a>;
<a name="l00106"></a><a class="code" href="classNL3D_1_1CRadixSort.html#o1">00106</a> uint <a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a>;
<a name="l00107"></a><a class="code" href="classNL3D_1_1CRadixSort.html#o2">00107</a> uint <a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a>;
00108 <font class="comment">// We sort digits per digit (default is byte per byte)</font>
<a name="l00109"></a><a class="code" href="classNL3D_1_1CRadixSort.html#o3">00109</a> std::vector<CSortDigit> <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>;
00110
00111
<a name="l00113"></a><a class="code" href="classNL3D_1_1CRadixSort.html#c0">00113</a> T *<a class="code" href="classNL3D_1_1CRadixSort.html#c0">doSort</a>(T *arraySrc, T *arrayDst, uint size, <font class="keywordtype">bool</font> increasingOrder)
00114 {
00115 <font class="keywordflow">if</font>(size==0)
00116 <font class="keywordflow">return</font> arraySrc;
00117
00118 <font class="comment">// for all digits.</font>
00119 <font class="keywordflow">for</font>(uint digit=0; digit< <a class="code" href="classNL3D_1_1CRadixSort.html#o0">_KeyDepth</a>; digit+=<a class="code" href="classNL3D_1_1CRadixSort.html#o1">_DigitDepth</a> )
00120 {
00121 sint i;
00122 <font class="comment">// how many bits do we shift?</font>
00123 uint digitShift= digit;
00124 uint digitMask= <a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a> - 1;
00125
00126 <font class="comment">// Init digit count.</font>
00127 <font class="keywordflow">for</font>(i=0; i<(sint)<a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a>; i++)
00128 {
00129 <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[i].Count= 0;
00130 }
00131
00132 <font class="comment">// for all elements in array, count the usage of current digit.</font>
00133 T *srcPtr= arraySrc;
00134 <font class="keywordflow">for</font>(i=0; i<(sint)size; i++, srcPtr++)
00135 {
00136 <font class="comment">// get the key for this element</font>
00137 uint32 key= srcPtr->getRadixKey();
00138 <font class="comment">// get the actual digit of interest</font>
00139 key>>= digitShift;
00140 key&= digitMask;
00141 <font class="comment">// increment the use of this digit.</font>
00142 <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[key].Count++;
00143 }
00144
00145 <font class="comment">// for all digit, init start Ptr.</font>
00146 T *dstPtr= arrayDst;
00147 <font class="keywordflow">if</font>(increasingOrder)
00148 {
00149 <font class="keywordflow">for</font>(i=0; i<(sint)<a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a>; i++)
00150 {
00151 <font class="comment">// setup the dest ptr for this digit.</font>
00152 <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[i].Ptr= dstPtr;
00153 <font class="comment">// increment the ptr of digit usage</font>
00154 dstPtr+= <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[i].Count;
00155 }
00156 }
00157 <font class="keywordflow">else</font>
00158 {
00159 <font class="comment">// reverse order of copy for digits, so the biggest one will </font>
00160 <font class="comment">// copy in the beginning of the array</font>
00161 <font class="keywordflow">for</font>(i=<a class="code" href="classNL3D_1_1CRadixSort.html#o2">_DigitSize</a>-1; i>=0; i--)
00162 {
00163 <font class="comment">// setup the dest ptr for this digit.</font>
00164 <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[i].Ptr= dstPtr;
00165 <font class="comment">// increment the ptr of digit usage</font>
00166 dstPtr+= <a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[i].Count;
00167 }
00168 }
00169
00170 <font class="comment">// for all elements, sort for this digit, by copying from src to dest.</font>
00171 srcPtr= arraySrc;
00172 <font class="keywordflow">for</font>(i=0; i<(sint)size; i++, srcPtr++)
00173 {
00174 <font class="comment">// get the key for this element</font>
00175 uint32 key= srcPtr->getRadixKey();
00176 <font class="comment">// get the actual digit of interest</font>
00177 key>>= digitShift;
00178 key&= digitMask;
00179 <font class="comment">// copy to good digit dst, and increment dest ptr.</font>
00180 *(<a class="code" href="classNL3D_1_1CRadixSort.html#o3">_SortDigits</a>[key].Ptr++)= *srcPtr;
00181 }
00182
00183 <font class="comment">// arraDst has now values of arraySrc sorted for the current digit.</font>
00184 <font class="comment">// now, restart with next digit, so swap src / dst</font>
00185 std::swap(arraySrc, arrayDst);
00186 }
00187
00188 <font class="comment">// return the array correctly sorted. because of last swap, this is arraySrc</font>
00189 <font class="keywordflow">return</font> arraySrc;
00190 }
00191
00192 };
00193
00194
00195 } <font class="comment">// NL3D</font>
00196
00197
00198 <font class="preprocessor">#endif // NL_RADIX_SORT_H</font>
00199 <font class="preprocessor"></font>
00200 <font class="comment">/* End of radix_sort.h */</font>
</pre></div>
<!-- footer -->
<BR><FONT Size=+5> </FONT>
</TD>
<TD WIDTH=15><IMG SRC=/inc/img/pixel.gif WIDTH=15 HEIGHT=15 BORDER=0 ALT=""></TD>
</TR>
</TABLE>
</BODY>
</HTML>
|
