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<h1>/home/v/Kate/WORK_TREES/kate-sorceress-backup/v/src/kate/src/kate_rle.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* Copyright (C) 2008 Vincent Penquerc'h.</span>
<a name="l00002"></a>00002 <span class="comment"> This file is part of the Kate codec library.</span>
<a name="l00003"></a>00003 <span class="comment"> Written by Vincent Penquerc'h.</span>
<a name="l00004"></a>00004 <span class="comment"></span>
<a name="l00005"></a>00005 <span class="comment"> Use, distribution and reproduction of this library is governed</span>
<a name="l00006"></a>00006 <span class="comment"> by a BSD style source license included with this source in the</span>
<a name="l00007"></a>00007 <span class="comment"> file 'COPYING'. Please read these terms before distributing. */</span>
<a name="l00008"></a>00008
<a name="l00009"></a>00009
<a name="l00010"></a>00010 <span class="preprocessor">#define KATE_INTERNAL</span>
<a name="l00011"></a>00011 <span class="preprocessor"></span><span class="preprocessor">#include "kate_internal.h"</span>
<a name="l00012"></a>00012
<a name="l00013"></a>00013 <span class="preprocessor">#ifdef HAVE_STRING_H</span>
<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#include <string.h></span>
<a name="l00015"></a>00015 <span class="preprocessor">#endif</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="preprocessor">#include "kate/kate.h"</span>
<a name="l00017"></a>00017 <span class="preprocessor">#include "kate_rle.h"</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="comment">/* 4 seems to be optimal for basic - 723 KB */</span>
<a name="l00020"></a>00020 <span class="comment">/* 3 seems to be optimal for basic_startend - 685 KB */</span>
<a name="l00021"></a>00021 <span class="comment">/* 4 seems to be optimal for basic_stop - 697 KB */</span>
<a name="l00022"></a>00022 <span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC 4</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_IN_DELTA 3</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND 3</span>
<a name="l00025"></a>00025 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP 6</span>
<a name="l00026"></a>00026 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_DELTA 6</span>
<a name="l00027"></a>00027 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_START 9</span>
<a name="l00028"></a>00028 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_END 8</span>
<a name="l00029"></a>00029 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP_START 8</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_IN_DELTA_STOP 3</span>
<a name="l00031"></a>00031 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_DELTA_STOP 5</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_ZERO 8</span>
<a name="l00033"></a>00033 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_RUN_LENGTH_BITS_BASIC_NON_ZERO 3</span>
<a name="l00034"></a>00034 <span class="preprocessor"></span>
<a name="l00035"></a>00035 <span class="preprocessor">#define KATE_RLE_TYPE_EMPTY 0</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_TYPE_BASIC 1</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_TYPE_DELTA 2</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_TYPE_BASIC_STOP 3</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_TYPE_BASIC_STARTEND 4</span>
<a name="l00040"></a>00040 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_TYPE_DELTA_STOP 5</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span><span class="preprocessor">#define KATE_RLE_TYPE_BASIC_ZERO 6</span>
<a name="l00042"></a>00042 <span class="preprocessor"></span>
<a name="l00043"></a>00043 <span class="preprocessor">#define KATE_RLE_TYPE_BITS 3</span>
<a name="l00044"></a>00044 <span class="preprocessor"></span>
<a name="l00045"></a>00045 <span class="preprocessor">#define kate_unused __attribute__((unused))</span>
<a name="l00046"></a>00046 <span class="preprocessor"></span>
<a name="l00047"></a>00047 <span class="keyword">static</span> <span class="keywordtype">size_t</span> get_run_length(<span class="keywordtype">size_t</span> max_run_length,<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values)
<a name="l00048"></a>00048 {
<a name="l00049"></a>00049 <span class="keyword">const</span> <span class="keywordtype">size_t</span> limit=max_run_length>count?count:max_run_length;
<a name="l00050"></a>00050 <span class="keywordtype">size_t</span> run_length=1;
<a name="l00051"></a>00051 <span class="keywordflow">while</span> (run_length<limit && values[run_length]==values[0])
<a name="l00052"></a>00052 ++run_length;
<a name="l00053"></a>00053 <span class="keywordflow">return</span> run_length;
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <span class="keyword">static</span> <span class="keywordtype">size_t</span> get_run_length_identical(<span class="keywordtype">size_t</span> max_run_length,<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero)
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <span class="keyword">const</span> <span class="keywordtype">size_t</span> limit=max_run_length>count?count:max_run_length;
<a name="l00059"></a>00059 <span class="keywordtype">size_t</span> run_length=0;
<a name="l00060"></a>00060 <span class="keywordflow">if</span> (previous) {
<a name="l00061"></a>00061 <span class="keywordflow">while</span> (run_length<limit && values[run_length]==previous[run_length])
<a name="l00062"></a>00062 ++run_length;
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064 <span class="keywordflow">else</span> {
<a name="l00065"></a>00065 <span class="keywordflow">while</span> (run_length<limit && values[run_length]==zero)
<a name="l00066"></a>00066 ++run_length;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068 <span class="keywordflow">return</span> run_length;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="keyword">static</span> <span class="keywordtype">size_t</span> get_run_length_zero(<span class="keywordtype">size_t</span> max_run_length,<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero)
<a name="l00072"></a>00072 {
<a name="l00073"></a>00073 <span class="keyword">const</span> <span class="keywordtype">size_t</span> limit=max_run_length>count?count:max_run_length;
<a name="l00074"></a>00074 <span class="keywordtype">size_t</span> run_length=1;
<a name="l00075"></a>00075 <span class="keywordflow">while</span> (run_length<limit && values[run_length]==zero)
<a name="l00076"></a>00076 ++run_length;
<a name="l00077"></a>00077 <span class="keywordflow">return</span> run_length;
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="keyword">static</span> <span class="keywordtype">size_t</span> get_run_length_zero_back(<span class="keywordtype">size_t</span> max_run_length,<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> nvalues,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <span class="keyword">const</span> <span class="keywordtype">size_t</span> limit=max_run_length>count?count:max_run_length;
<a name="l00083"></a>00083 <span class="keywordtype">size_t</span> run_length=0;
<a name="l00084"></a>00084 <span class="keywordflow">while</span> (run_length<limit && values[nvalues-1-run_length]==zero)
<a name="l00085"></a>00085 ++run_length;
<a name="l00086"></a>00086 <span class="keywordflow">return</span> run_length;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_basic(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero kate_unused,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous kate_unused,kate_pack_buffer *kpb)
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC;
<a name="l00092"></a>00092 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_cutoff=1<<run_length_bits;
<a name="l00093"></a>00093 <span class="keywordtype">size_t</span> run_length,max_run_length;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordflow">while</span> (count>0) {
<a name="l00096"></a>00096 max_run_length=run_length_cutoff;
<a name="l00097"></a>00097 run_length=get_run_length(max_run_length,count,values);
<a name="l00098"></a>00098 kate_pack_write(kpb,run_length-1,run_length_bits);
<a name="l00099"></a>00099 kate_pack_write(kpb,values[0],bits);
<a name="l00100"></a>00100 values+=run_length;
<a name="l00101"></a>00101 count-=run_length;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <span class="keywordflow">return</span> 0;
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_basic_zero(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero kate_unused,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous kate_unused,kate_pack_buffer *kpb)
<a name="l00108"></a>00108 {
<a name="l00109"></a>00109 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits_zero=KATE_RLE_RUN_LENGTH_BITS_BASIC_ZERO;
<a name="l00110"></a>00110 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits_non_zero=KATE_RLE_RUN_LENGTH_BITS_BASIC_NON_ZERO;
<a name="l00111"></a>00111 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_zero_cutoff=1<<run_length_bits_zero;
<a name="l00112"></a>00112 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_non_zero_cutoff=1<<run_length_bits_non_zero;
<a name="l00113"></a>00113 <span class="keywordtype">size_t</span> run_length,max_run_length,run_length_bits;
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="keywordflow">while</span> (count>0) {
<a name="l00116"></a>00116 <span class="keywordflow">if</span> (values[0]==zero) {
<a name="l00117"></a>00117 max_run_length=run_length_zero_cutoff;
<a name="l00118"></a>00118 run_length_bits=run_length_bits_zero;
<a name="l00119"></a>00119 }
<a name="l00120"></a>00120 <span class="keywordflow">else</span> {
<a name="l00121"></a>00121 max_run_length=run_length_non_zero_cutoff;
<a name="l00122"></a>00122 run_length_bits=run_length_bits_non_zero;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124 run_length=get_run_length(max_run_length,count,values);
<a name="l00125"></a>00125 kate_pack_write(kpb,values[0],bits);
<a name="l00126"></a>00126 kate_pack_write(kpb,run_length-1,run_length_bits);
<a name="l00127"></a>00127 values+=run_length;
<a name="l00128"></a>00128 count-=run_length;
<a name="l00129"></a>00129 }
<a name="l00130"></a>00130
<a name="l00131"></a>00131 <span class="keywordflow">return</span> 0;
<a name="l00132"></a>00132 }
<a name="l00133"></a>00133
<a name="l00134"></a>00134 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_basic_startend(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous kate_unused,kate_pack_buffer *kpb)
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND;
<a name="l00137"></a>00137 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_cutoff=1<<run_length_bits;
<a name="l00138"></a>00138 <span class="keywordtype">size_t</span> run_length,run_length_start,run_length_end,max_run_length;
<a name="l00139"></a>00139
<a name="l00140"></a>00140 max_run_length=(1<<KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_START)-1;
<a name="l00141"></a>00141 run_length_start=get_run_length_zero(max_run_length,count,values,zero);
<a name="l00142"></a>00142 kate_pack_write(kpb,run_length_start,KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_START);
<a name="l00143"></a>00143 values+=run_length_start;
<a name="l00144"></a>00144 count-=run_length_start;
<a name="l00145"></a>00145
<a name="l00146"></a>00146 max_run_length=(1<<KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_END)-1;
<a name="l00147"></a>00147 run_length_end=get_run_length_zero_back(max_run_length,count,values,count,zero);
<a name="l00148"></a>00148 kate_pack_write(kpb,run_length_end,KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_END);
<a name="l00149"></a>00149 count-=run_length_end;
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keywordflow">while</span> (count>0) {
<a name="l00152"></a>00152 max_run_length=run_length_cutoff;
<a name="l00153"></a>00153 run_length=get_run_length(max_run_length,count,values);
<a name="l00154"></a>00154 kate_pack_write(kpb,run_length-1,run_length_bits);
<a name="l00155"></a>00155 kate_pack_write(kpb,values[0],bits);
<a name="l00156"></a>00156 values+=run_length;
<a name="l00157"></a>00157 count-=run_length;
<a name="l00158"></a>00158 }
<a name="l00159"></a>00159
<a name="l00160"></a>00160 <span class="keywordflow">return</span> 0;
<a name="l00161"></a>00161 }
<a name="l00162"></a>00162
<a name="l00163"></a>00163 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_basic_stop(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous kate_unused,kate_pack_buffer *kpb)
<a name="l00164"></a>00164 {
<a name="l00165"></a>00165 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP;
<a name="l00166"></a>00166 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_cutoff=(1<<run_length_bits)-1;
<a name="l00167"></a>00167 <span class="keywordtype">size_t</span> run_length,run_length_start,max_run_length;
<a name="l00168"></a>00168
<a name="l00169"></a>00169 max_run_length=(1<<KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP_START)-1;
<a name="l00170"></a>00170 run_length_start=get_run_length_zero(max_run_length,count,values,zero);
<a name="l00171"></a>00171 kate_pack_write(kpb,run_length_start,KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP_START);
<a name="l00172"></a>00172 values+=run_length_start;
<a name="l00173"></a>00173 count-=run_length_start;
<a name="l00174"></a>00174
<a name="l00175"></a>00175 <span class="keywordflow">while</span> (count>0) {
<a name="l00176"></a>00176 <span class="keywordflow">if</span> (values[0]==zero) {
<a name="l00177"></a>00177 run_length=get_run_length(count,count,values);
<a name="l00178"></a>00178 <span class="keywordflow">if</span> (run_length==count) {
<a name="l00179"></a>00179 kate_pack_write(kpb,0,run_length_bits);
<a name="l00180"></a>00180 <span class="keywordflow">break</span>;
<a name="l00181"></a>00181 }
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 max_run_length=run_length_cutoff;
<a name="l00184"></a>00184 run_length=get_run_length(max_run_length,count,values);
<a name="l00185"></a>00185 kate_pack_write(kpb,run_length,run_length_bits);
<a name="l00186"></a>00186 kate_pack_write(kpb,values[0],bits);
<a name="l00187"></a>00187 values+=run_length;
<a name="l00188"></a>00188 count-=run_length;
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordflow">return</span> 0;
<a name="l00192"></a>00192 }
<a name="l00193"></a>00193
<a name="l00194"></a>00194 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_empty(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits kate_unused,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous kate_unused,kate_pack_buffer *kpb kate_unused)
<a name="l00195"></a>00195 {
<a name="l00196"></a>00196 <span class="keywordtype">size_t</span> run_length=get_run_length_zero(count,count,values,zero);
<a name="l00197"></a>00197 <span class="keywordflow">if</span> (run_length<count) <span class="keywordflow">return</span> -1;
<a name="l00198"></a>00198 <span class="keywordflow">return</span> 0;
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_delta(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero kate_unused,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous,kate_pack_buffer *kpb)
<a name="l00202"></a>00202 {
<a name="l00203"></a>00203 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_delta_bits=KATE_RLE_RUN_LENGTH_BITS_DELTA;
<a name="l00204"></a>00204 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_delta_cutoff=(1<<run_length_delta_bits);
<a name="l00205"></a>00205 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_basic_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_IN_DELTA;
<a name="l00206"></a>00206 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_basic_cutoff=(1<<run_length_basic_bits);
<a name="l00207"></a>00207 <span class="keywordtype">size_t</span> max_run_length_delta,max_run_length_basic;
<a name="l00208"></a>00208 <span class="keywordtype">size_t</span> run_length_delta,run_length_basic;
<a name="l00209"></a>00209
<a name="l00210"></a>00210 <span class="keywordflow">while</span> (count>0) {
<a name="l00211"></a>00211 max_run_length_delta=run_length_delta_cutoff;
<a name="l00212"></a>00212 run_length_delta=get_run_length_identical(max_run_length_delta,count,values,previous,zero);
<a name="l00213"></a>00213
<a name="l00214"></a>00214 max_run_length_basic=run_length_basic_cutoff;
<a name="l00215"></a>00215 run_length_basic=get_run_length(max_run_length_basic,count,values);
<a name="l00216"></a>00216
<a name="l00217"></a>00217 <span class="keywordflow">if</span> (run_length_delta>run_length_basic) {
<a name="l00218"></a>00218 kate_pack_write(kpb,1,1);
<a name="l00219"></a>00219 kate_pack_write(kpb,run_length_delta-1,run_length_delta_bits);
<a name="l00220"></a>00220 values+=run_length_delta;
<a name="l00221"></a>00221 <span class="keywordflow">if</span> (previous) previous+=run_length_delta;
<a name="l00222"></a>00222 count-=run_length_delta;
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 <span class="keywordflow">else</span> {
<a name="l00225"></a>00225 kate_pack_write(kpb,0,1);
<a name="l00226"></a>00226 kate_pack_write(kpb,run_length_basic-1,run_length_basic_bits);
<a name="l00227"></a>00227 kate_pack_write(kpb,values[0],bits);
<a name="l00228"></a>00228 values+=run_length_basic;
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (previous) previous+=run_length_basic;
<a name="l00230"></a>00230 count-=run_length_basic;
<a name="l00231"></a>00231 }
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="keywordflow">return</span> 0;
<a name="l00235"></a>00235 }
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_line_delta_stop(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous,kate_pack_buffer *kpb)
<a name="l00238"></a>00238 {
<a name="l00239"></a>00239 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_delta_bits=KATE_RLE_RUN_LENGTH_BITS_DELTA_STOP;
<a name="l00240"></a>00240 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_delta_cutoff=(1<<run_length_delta_bits);
<a name="l00241"></a>00241 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_basic_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_IN_DELTA_STOP;
<a name="l00242"></a>00242 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_basic_cutoff=(1<<run_length_basic_bits)-1;
<a name="l00243"></a>00243 <span class="keywordtype">size_t</span> max_run_length_delta,max_run_length_basic;
<a name="l00244"></a>00244 <span class="keywordtype">size_t</span> run_length_delta,run_length_basic,run_length;
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="keywordflow">while</span> (count>0) {
<a name="l00247"></a>00247 <span class="keywordflow">if</span> (values[0]==zero) {
<a name="l00248"></a>00248 run_length=get_run_length(count,count,values);
<a name="l00249"></a>00249 <span class="keywordflow">if</span> (run_length==count) {
<a name="l00250"></a>00250 kate_pack_write(kpb,0,1);
<a name="l00251"></a>00251 kate_pack_write(kpb,0,run_length_basic_bits);
<a name="l00252"></a>00252 <span class="keywordflow">break</span>;
<a name="l00253"></a>00253 }
<a name="l00254"></a>00254 }
<a name="l00255"></a>00255
<a name="l00256"></a>00256 max_run_length_delta=run_length_delta_cutoff;
<a name="l00257"></a>00257 run_length_delta=get_run_length_identical(max_run_length_delta,count,values,previous,zero);
<a name="l00258"></a>00258
<a name="l00259"></a>00259 max_run_length_basic=run_length_basic_cutoff;
<a name="l00260"></a>00260 run_length_basic=get_run_length(max_run_length_basic,count,values);
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="keywordflow">if</span> (run_length_delta>run_length_basic) {
<a name="l00263"></a>00263 kate_pack_write(kpb,1,1);
<a name="l00264"></a>00264 run_length=run_length_delta;
<a name="l00265"></a>00265 kate_pack_write(kpb,run_length-1,run_length_delta_bits);
<a name="l00266"></a>00266 }
<a name="l00267"></a>00267 <span class="keywordflow">else</span> {
<a name="l00268"></a>00268 kate_pack_write(kpb,0,1);
<a name="l00269"></a>00269 run_length=run_length_basic;
<a name="l00270"></a>00270 kate_pack_write(kpb,run_length,run_length_basic_bits);
<a name="l00271"></a>00271 kate_pack_write(kpb,values[0],bits);
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273 values+=run_length;
<a name="l00274"></a>00274 <span class="keywordflow">if</span> (previous) previous+=run_length;
<a name="l00275"></a>00275 count-=run_length;
<a name="l00276"></a>00276 }
<a name="l00277"></a>00277
<a name="l00278"></a>00278 <span class="keywordflow">return</span> 0;
<a name="l00279"></a>00279 }
<a name="l00280"></a>00280
<a name="l00281"></a>00281 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00282"></a>00282 <span class="preprocessor"></span><span class="keywordtype">int</span> kate_rle_stats[8]={0};
<a name="l00283"></a>00283 <span class="keywordtype">int</span> kate_rle_stats_overall[8]={0};
<a name="l00284"></a>00284 <span class="preprocessor">#endif</span>
<a name="l00285"></a>00285 <span class="preprocessor"></span>
<a name="l00286"></a>00286 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_try_encoding(kate_pack_buffer *kpb,<span class="keywordtype">int</span> (*encoder)(<span class="keywordtype">size_t</span>,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*,<span class="keywordtype">size_t</span>,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>*,kate_pack_buffer*),<span class="keywordtype">size_t</span> width,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous,<span class="keywordtype">int</span> kpb_type,<span class="keywordtype">int</span> type)
<a name="l00287"></a>00287 {
<a name="l00288"></a>00288 kate_pack_buffer tmp;
<a name="l00289"></a>00289 kate_pack_writeinit(&tmp);
<a name="l00290"></a>00290 <span class="keywordflow">if</span> ((*encoder)(width,values,bits,zero,previous,&tmp)==0) {
<a name="l00291"></a>00291 <span class="keywordtype">long</span> kpb_size=kate_pack_bits(kpb);
<a name="l00292"></a>00292 <span class="keywordtype">long</span> tmp_size=kate_pack_bits(&tmp);
<a name="l00293"></a>00293 <span class="keywordflow">if</span> (kpb_type<0 || tmp_size<kpb_size) {
<a name="l00294"></a>00294 kate_pack_writeclear(kpb);
<a name="l00295"></a>00295 memcpy(kpb,&tmp,<span class="keyword">sizeof</span>(tmp));
<a name="l00296"></a>00296 <span class="keywordflow">return</span> type;
<a name="l00297"></a>00297 }
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299 kate_pack_writeclear(&tmp);
<a name="l00300"></a>00300 <span class="keywordflow">return</span> kpb_type;
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302
<a name="l00303"></a>00303 <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> get_zero(<span class="keywordtype">size_t</span> count,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values)
<a name="l00304"></a>00304 {
<a name="l00305"></a>00305 <span class="keywordtype">int</span> counts[256],n,best=0;
<a name="l00306"></a>00306 memset(counts,0,<span class="keyword">sizeof</span>(counts));
<a name="l00307"></a>00307 <span class="keywordflow">while</span> (count-->0) ++counts[*values++];
<a name="l00308"></a>00308 <span class="keywordflow">for</span> (n=0;n<256;++n) if (counts[n]>counts[best]) best=n;
<a name="l00309"></a>00309 <span class="keywordflow">return</span> best;
<a name="l00310"></a>00310 }
<a name="l00311"></a>00311
<a name="l00312"></a>00312 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_encode_best(<span class="keywordtype">size_t</span> width,<span class="keywordtype">size_t</span> height,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,kate_pack_buffer *kpb)
<a name="l00313"></a>00313 {
<a name="l00314"></a>00314 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous=NULL;
<a name="l00315"></a>00315 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero=get_zero(width*height,values);
<a name="l00316"></a>00316
<a name="l00317"></a>00317 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00318"></a>00318 <span class="preprocessor"></span> memset(kate_rle_stats,0,<span class="keyword">sizeof</span>(kate_rle_stats));
<a name="l00319"></a>00319 <span class="preprocessor">#endif</span>
<a name="l00320"></a>00320 <span class="preprocessor"></span>
<a name="l00321"></a>00321 kate_pack_write(kpb,zero,bits);
<a name="l00322"></a>00322 <span class="keywordflow">while</span> (height>0) {
<a name="l00323"></a>00323 <span class="keywordtype">int</span> best_type=-1;
<a name="l00324"></a>00324 kate_pack_buffer best_buffer;
<a name="l00325"></a>00325 kate_pack_writeinit(&best_buffer);
<a name="l00326"></a>00326
<a name="l00327"></a>00327 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_empty,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_EMPTY);
<a name="l00328"></a>00328 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_delta,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_DELTA);
<a name="l00329"></a>00329 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_basic,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_BASIC);
<a name="l00330"></a>00330 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_basic_startend,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_BASIC_STARTEND);
<a name="l00331"></a>00331 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_basic_stop,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_BASIC_STOP);
<a name="l00332"></a>00332 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_delta_stop,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_DELTA_STOP);
<a name="l00333"></a>00333 best_type=kate_rle_try_encoding(&best_buffer,&kate_rle_encode_line_basic_zero,width,values,bits,zero,previous,best_type,KATE_RLE_TYPE_BASIC_ZERO);
<a name="l00334"></a>00334
<a name="l00335"></a>00335 <span class="preprocessor">#ifdef DEBUG</span>
<a name="l00336"></a>00336 <span class="preprocessor"></span> ++kate_rle_stats[best_type];
<a name="l00337"></a>00337 ++kate_rle_stats_overall[best_type];
<a name="l00338"></a>00338 <span class="preprocessor">#endif</span>
<a name="l00339"></a>00339 <span class="preprocessor"></span>
<a name="l00340"></a>00340 kate_pack_write(kpb,best_type,KATE_RLE_TYPE_BITS);
<a name="l00341"></a>00341 kate_pack_writecopy(kpb,kate_pack_get_buffer(&best_buffer),kate_pack_bits(&best_buffer));
<a name="l00342"></a>00342
<a name="l00343"></a>00343 kate_pack_writeclear(&best_buffer);
<a name="l00344"></a>00344
<a name="l00345"></a>00345 previous=values;
<a name="l00346"></a>00346
<a name="l00347"></a>00347 values+=width;
<a name="l00348"></a>00348 --height;
<a name="l00349"></a>00349 }
<a name="l00350"></a>00350
<a name="l00351"></a>00351 <span class="keywordflow">return</span> 0;
<a name="l00352"></a>00352 }
<a name="l00353"></a>00353
<a name="l00354"></a>00354 <span class="keywordtype">int</span> kate_rle_encode(<span class="keywordtype">size_t</span> width,<span class="keywordtype">size_t</span> height,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,kate_pack_buffer *kpb)
<a name="l00355"></a>00355 {
<a name="l00356"></a>00356 <span class="keywordflow">return</span> kate_rle_encode_best(width,height,values,bits,kpb);
<a name="l00357"></a>00357 }
<a name="l00358"></a>00358
<a name="l00359"></a>00359 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_empty(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits kate_unused,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,kate_pack_buffer *kpb kate_unused)
<a name="l00360"></a>00360 {
<a name="l00361"></a>00361 memset(values,zero,count);
<a name="l00362"></a>00362 <span class="keywordflow">return</span> 0;
<a name="l00363"></a>00363 }
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_basic(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,kate_pack_buffer *kpb)
<a name="l00366"></a>00366 {
<a name="l00367"></a>00367 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC;
<a name="l00368"></a>00368 <span class="keywordtype">size_t</span> run_length;
<a name="l00369"></a>00369 <span class="keywordtype">int</span> value;
<a name="l00370"></a>00370
<a name="l00371"></a>00371 <span class="keywordflow">while</span> (count>0) {
<a name="l00372"></a>00372 run_length=1+kate_pack_read(kpb,run_length_bits);
<a name="l00373"></a>00373 <span class="keywordflow">if</span> (run_length==0 || run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00374"></a>00374 value=kate_pack_read(kpb,bits);
<a name="l00375"></a>00375 memset(values,value,run_length);
<a name="l00376"></a>00376 values+=run_length;
<a name="l00377"></a>00377 count-=run_length;
<a name="l00378"></a>00378 }
<a name="l00379"></a>00379
<a name="l00380"></a>00380 <span class="keywordflow">return</span> 0;
<a name="l00381"></a>00381 }
<a name="l00382"></a>00382
<a name="l00383"></a>00383 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_basic_zero(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,kate_pack_buffer *kpb)
<a name="l00384"></a>00384 {
<a name="l00385"></a>00385 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits_zero=KATE_RLE_RUN_LENGTH_BITS_BASIC_ZERO;
<a name="l00386"></a>00386 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits_non_zero=KATE_RLE_RUN_LENGTH_BITS_BASIC_NON_ZERO;
<a name="l00387"></a>00387 <span class="keywordtype">size_t</span> run_length;
<a name="l00388"></a>00388 <span class="keywordtype">int</span> value;
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="keywordflow">while</span> (count>0) {
<a name="l00391"></a>00391 value=kate_pack_read(kpb,bits);
<a name="l00392"></a>00392 <span class="keywordflow">if</span> (value==zero) {
<a name="l00393"></a>00393 run_length=1+kate_pack_read(kpb,run_length_bits_zero);
<a name="l00394"></a>00394 }
<a name="l00395"></a>00395 <span class="keywordflow">else</span> {
<a name="l00396"></a>00396 run_length=1+kate_pack_read(kpb,run_length_bits_non_zero);
<a name="l00397"></a>00397 }
<a name="l00398"></a>00398 <span class="keywordflow">if</span> (run_length==0 || run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00399"></a>00399 memset(values,value,run_length);
<a name="l00400"></a>00400 values+=run_length;
<a name="l00401"></a>00401 count-=run_length;
<a name="l00402"></a>00402 }
<a name="l00403"></a>00403
<a name="l00404"></a>00404 <span class="keywordflow">return</span> 0;
<a name="l00405"></a>00405 }
<a name="l00406"></a>00406
<a name="l00407"></a>00407 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_basic_stop(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,kate_pack_buffer *kpb)
<a name="l00408"></a>00408 {
<a name="l00409"></a>00409 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP;
<a name="l00410"></a>00410 <span class="keywordtype">size_t</span> run_length;
<a name="l00411"></a>00411 <span class="keywordtype">int</span> value;
<a name="l00412"></a>00412
<a name="l00413"></a>00413 run_length=kate_pack_read(kpb,KATE_RLE_RUN_LENGTH_BITS_BASIC_STOP_START);
<a name="l00414"></a>00414 <span class="keywordflow">if</span> (run_length>0) {
<a name="l00415"></a>00415 <span class="keywordflow">if</span> (run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00416"></a>00416 memset(values,zero,run_length);
<a name="l00417"></a>00417 values+=run_length;
<a name="l00418"></a>00418 count-=run_length;
<a name="l00419"></a>00419 }
<a name="l00420"></a>00420
<a name="l00421"></a>00421 <span class="keywordflow">while</span> (count>0) {
<a name="l00422"></a>00422 run_length=kate_pack_read(kpb,run_length_bits);
<a name="l00423"></a>00423 <span class="keywordflow">if</span> (run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00424"></a>00424 <span class="keywordflow">if</span> (run_length==0) {
<a name="l00425"></a>00425 memset(values,zero,count);
<a name="l00426"></a>00426 <span class="keywordflow">break</span>;
<a name="l00427"></a>00427 }
<a name="l00428"></a>00428 value=kate_pack_read(kpb,bits);
<a name="l00429"></a>00429 memset(values,value,run_length);
<a name="l00430"></a>00430 values+=run_length;
<a name="l00431"></a>00431 count-=run_length;
<a name="l00432"></a>00432 }
<a name="l00433"></a>00433
<a name="l00434"></a>00434 <span class="keywordflow">return</span> 0;
<a name="l00435"></a>00435 }
<a name="l00436"></a>00436
<a name="l00437"></a>00437 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_basic_startend(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,kate_pack_buffer *kpb)
<a name="l00438"></a>00438 {
<a name="l00439"></a>00439 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND;
<a name="l00440"></a>00440 <span class="keywordtype">size_t</span> run_length;
<a name="l00441"></a>00441 <span class="keywordtype">int</span> value;
<a name="l00442"></a>00442
<a name="l00443"></a>00443 run_length=kate_pack_read(kpb,KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_START);
<a name="l00444"></a>00444 <span class="keywordflow">if</span> (run_length>0) {
<a name="l00445"></a>00445 <span class="keywordflow">if</span> (run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00446"></a>00446 memset(values,zero,run_length);
<a name="l00447"></a>00447 values+=run_length;
<a name="l00448"></a>00448 count-=run_length;
<a name="l00449"></a>00449 }
<a name="l00450"></a>00450
<a name="l00451"></a>00451 run_length=kate_pack_read(kpb,KATE_RLE_RUN_LENGTH_BITS_BASIC_STARTEND_END);
<a name="l00452"></a>00452 <span class="keywordflow">if</span> (run_length>0) {
<a name="l00453"></a>00453 <span class="keywordflow">if</span> (run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00454"></a>00454 memset(values+count-run_length,zero,run_length);
<a name="l00455"></a>00455 count-=run_length;
<a name="l00456"></a>00456 }
<a name="l00457"></a>00457
<a name="l00458"></a>00458 <span class="keywordflow">while</span> (count>0) {
<a name="l00459"></a>00459 run_length=1+kate_pack_read(kpb,run_length_bits);
<a name="l00460"></a>00460 <span class="keywordflow">if</span> (run_length_bits==0 || run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00461"></a>00461 value=kate_pack_read(kpb,bits);
<a name="l00462"></a>00462 memset(values,value,run_length);
<a name="l00463"></a>00463 values+=run_length;
<a name="l00464"></a>00464 count-=run_length;
<a name="l00465"></a>00465 }
<a name="l00466"></a>00466
<a name="l00467"></a>00467 <span class="keywordflow">return</span> 0;
<a name="l00468"></a>00468 }
<a name="l00469"></a>00469
<a name="l00470"></a>00470 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_delta(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,kate_pack_buffer *kpb)
<a name="l00471"></a>00471 {
<a name="l00472"></a>00472 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_delta_bits=KATE_RLE_RUN_LENGTH_BITS_DELTA;
<a name="l00473"></a>00473 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_basic_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_IN_DELTA;
<a name="l00474"></a>00474 <span class="keywordtype">int</span> value;
<a name="l00475"></a>00475
<a name="l00476"></a>00476 <span class="keywordflow">while</span> (count>0) {
<a name="l00477"></a>00477 <span class="keywordtype">int</span> type=kate_pack_read1(kpb);
<a name="l00478"></a>00478 <span class="keywordflow">if</span> (type) {
<a name="l00479"></a>00479 <span class="keywordtype">size_t</span> run_length=1+kate_pack_read(kpb,run_length_delta_bits);
<a name="l00480"></a>00480 <span class="keywordflow">if</span> (run_length==0 || run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00481"></a>00481 <span class="keywordflow">if</span> (previous) {
<a name="l00482"></a>00482 memcpy(values,previous,run_length);
<a name="l00483"></a>00483 previous+=run_length;
<a name="l00484"></a>00484 }
<a name="l00485"></a>00485 <span class="keywordflow">else</span> {
<a name="l00486"></a>00486 memset(values,zero,run_length);
<a name="l00487"></a>00487 }
<a name="l00488"></a>00488 values+=run_length;
<a name="l00489"></a>00489 count-=run_length;
<a name="l00490"></a>00490 }
<a name="l00491"></a>00491 <span class="keywordflow">else</span> {
<a name="l00492"></a>00492 <span class="keywordtype">size_t</span> run_length=1+kate_pack_read(kpb,run_length_basic_bits);
<a name="l00493"></a>00493 <span class="keywordflow">if</span> (run_length==0 || run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00494"></a>00494 value=kate_pack_read(kpb,bits);
<a name="l00495"></a>00495 memset(values,value,run_length);
<a name="l00496"></a>00496 values+=run_length;
<a name="l00497"></a>00497 <span class="keywordflow">if</span> (previous) previous+=run_length;
<a name="l00498"></a>00498 count-=run_length;
<a name="l00499"></a>00499 }
<a name="l00500"></a>00500 }
<a name="l00501"></a>00501 <span class="keywordflow">return</span> 0;
<a name="l00502"></a>00502 }
<a name="l00503"></a>00503
<a name="l00504"></a>00504 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_line_delta_stop(<span class="keywordtype">size_t</span> count,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous,<span class="keywordtype">size_t</span> bits,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero,kate_pack_buffer *kpb)
<a name="l00505"></a>00505 {
<a name="l00506"></a>00506 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_delta_bits=KATE_RLE_RUN_LENGTH_BITS_DELTA_STOP;
<a name="l00507"></a>00507 <span class="keyword">const</span> <span class="keywordtype">size_t</span> run_length_basic_bits=KATE_RLE_RUN_LENGTH_BITS_BASIC_IN_DELTA_STOP;
<a name="l00508"></a>00508 <span class="keywordtype">size_t</span> run_length;
<a name="l00509"></a>00509 <span class="keywordtype">int</span> value,type;
<a name="l00510"></a>00510
<a name="l00511"></a>00511 <span class="keywordflow">while</span> (count>0) {
<a name="l00512"></a>00512 type=kate_pack_read1(kpb);
<a name="l00513"></a>00513 <span class="keywordflow">if</span> (type) {
<a name="l00514"></a>00514 run_length=1+kate_pack_read(kpb,run_length_delta_bits);
<a name="l00515"></a>00515 <span class="keywordflow">if</span> (run_length==0 || run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00516"></a>00516 <span class="keywordflow">if</span> (previous) {
<a name="l00517"></a>00517 memcpy(values,previous,run_length);
<a name="l00518"></a>00518 }
<a name="l00519"></a>00519 <span class="keywordflow">else</span> {
<a name="l00520"></a>00520 memset(values,zero,run_length);
<a name="l00521"></a>00521 }
<a name="l00522"></a>00522 }
<a name="l00523"></a>00523 <span class="keywordflow">else</span> {
<a name="l00524"></a>00524 run_length=kate_pack_read(kpb,run_length_basic_bits);
<a name="l00525"></a>00525 <span class="keywordflow">if</span> (run_length==0) {
<a name="l00526"></a>00526 memset(values,zero,count);
<a name="l00527"></a>00527 <span class="keywordflow">break</span>;
<a name="l00528"></a>00528 }
<a name="l00529"></a>00529 <span class="keywordflow">if</span> (run_length>count) <span class="keywordflow">return</span> KATE_E_BAD_PACKET;
<a name="l00530"></a>00530 value=kate_pack_read(kpb,bits);
<a name="l00531"></a>00531 memset(values,value,run_length);
<a name="l00532"></a>00532 }
<a name="l00533"></a>00533 values+=run_length;
<a name="l00534"></a>00534 <span class="keywordflow">if</span> (previous) previous+=run_length;
<a name="l00535"></a>00535 count-=run_length;
<a name="l00536"></a>00536 }
<a name="l00537"></a>00537 <span class="keywordflow">return</span> 0;
<a name="l00538"></a>00538 }
<a name="l00539"></a>00539
<a name="l00540"></a>00540 <span class="keyword">static</span> <span class="keywordtype">int</span> kate_rle_decode_best(<span class="keywordtype">size_t</span> width,<span class="keywordtype">size_t</span> height,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,kate_pack_buffer *kpb)
<a name="l00541"></a>00541 {
<a name="l00542"></a>00542 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *previous=NULL;
<a name="l00543"></a>00543 <span class="keywordtype">int</span> ret;
<a name="l00544"></a>00544
<a name="l00545"></a>00545 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> zero=kate_pack_read(kpb,bits);
<a name="l00546"></a>00546 <span class="keywordflow">while</span> (height>0) {
<a name="l00547"></a>00547 <span class="keywordtype">int</span> type=kate_pack_read(kpb,KATE_RLE_TYPE_BITS);
<a name="l00548"></a>00548 <span class="keywordflow">switch</span> (type) {
<a name="l00549"></a>00549 <span class="keywordflow">case</span> KATE_RLE_TYPE_EMPTY:
<a name="l00550"></a>00550 ret=kate_rle_decode_line_empty(width,values,bits,zero,kpb);
<a name="l00551"></a>00551 <span class="keywordflow">break</span>;
<a name="l00552"></a>00552 <span class="keywordflow">case</span> KATE_RLE_TYPE_DELTA:
<a name="l00553"></a>00553 ret=kate_rle_decode_line_delta(width,values,previous,bits,zero,kpb);
<a name="l00554"></a>00554 <span class="keywordflow">break</span>;
<a name="l00555"></a>00555 <span class="keywordflow">case</span> KATE_RLE_TYPE_BASIC:
<a name="l00556"></a>00556 ret=kate_rle_decode_line_basic(width,values,bits,kpb);
<a name="l00557"></a>00557 <span class="keywordflow">break</span>;
<a name="l00558"></a>00558 <span class="keywordflow">case</span> KATE_RLE_TYPE_BASIC_STARTEND:
<a name="l00559"></a>00559 ret=kate_rle_decode_line_basic_startend(width,values,bits,zero,kpb);
<a name="l00560"></a>00560 <span class="keywordflow">break</span>;
<a name="l00561"></a>00561 <span class="keywordflow">case</span> KATE_RLE_TYPE_BASIC_STOP:
<a name="l00562"></a>00562 ret=kate_rle_decode_line_basic_stop(width,values,bits,zero,kpb);
<a name="l00563"></a>00563 <span class="keywordflow">break</span>;
<a name="l00564"></a>00564 <span class="keywordflow">case</span> KATE_RLE_TYPE_DELTA_STOP:
<a name="l00565"></a>00565 ret=kate_rle_decode_line_delta_stop(width,values,previous,bits,zero,kpb);
<a name="l00566"></a>00566 <span class="keywordflow">break</span>;
<a name="l00567"></a>00567 <span class="keywordflow">case</span> KATE_RLE_TYPE_BASIC_ZERO:
<a name="l00568"></a>00568 ret=kate_rle_decode_line_basic_zero(width,values,bits,zero,kpb);
<a name="l00569"></a>00569 <span class="keywordflow">break</span>;
<a name="l00570"></a>00570 <span class="keywordflow">default</span>:
<a name="l00571"></a>00571 ret=KATE_E_BAD_PACKET;
<a name="l00572"></a>00572 <span class="keywordflow">break</span>;
<a name="l00573"></a>00573 }
<a name="l00574"></a>00574 <span class="keywordflow">if</span> (ret<0) <span class="keywordflow">return</span> ret;
<a name="l00575"></a>00575
<a name="l00576"></a>00576 previous=values;
<a name="l00577"></a>00577 values+=width;
<a name="l00578"></a>00578 --height;
<a name="l00579"></a>00579 }
<a name="l00580"></a>00580
<a name="l00581"></a>00581 <span class="keywordflow">return</span> 0;
<a name="l00582"></a>00582 }
<a name="l00583"></a>00583
<a name="l00584"></a>00584 <span class="keywordtype">int</span> kate_rle_decode(<span class="keywordtype">size_t</span> width,<span class="keywordtype">size_t</span> height,<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *values,<span class="keywordtype">size_t</span> bits,kate_pack_buffer *kpb)
<a name="l00585"></a>00585 {
<a name="l00586"></a>00586 <span class="keywordflow">return</span> kate_rle_decode_best(width,height,values,bits,kpb);
<a name="l00587"></a>00587 }
<a name="l00588"></a>00588
</pre></div></div>
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