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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div id="projectbrief">C Image Processing Library</div>
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<h1>arrayaccess.c</h1> </div>
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<div class="contents">
<a href="arrayaccess_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*====================================================================*</span>
<a name="l00002"></a>00002 <span class="comment"> - Copyright (C) 2001 Leptonica. All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment"> - This software is distributed in the hope that it will be</span>
<a name="l00004"></a>00004 <span class="comment"> - useful, but with NO WARRANTY OF ANY KIND.</span>
<a name="l00005"></a>00005 <span class="comment"> - No author or distributor accepts responsibility to anyone for the</span>
<a name="l00006"></a>00006 <span class="comment"> - consequences of using this software, or for whether it serves any</span>
<a name="l00007"></a>00007 <span class="comment"> - particular purpose or works at all, unless he or she says so in</span>
<a name="l00008"></a>00008 <span class="comment"> - writing. Everyone is granted permission to copy, modify and</span>
<a name="l00009"></a>00009 <span class="comment"> - redistribute this source code, for commercial or non-commercial</span>
<a name="l00010"></a>00010 <span class="comment"> - purposes, with the following restrictions: (1) the origin of this</span>
<a name="l00011"></a>00011 <span class="comment"> - source code must not be misrepresented; (2) modified versions must</span>
<a name="l00012"></a>00012 <span class="comment"> - be plainly marked as such; and (3) this notice may not be removed</span>
<a name="l00013"></a>00013 <span class="comment"> - or altered from any source or modified source distribution.</span>
<a name="l00014"></a>00014 <span class="comment"> *====================================================================*/</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="comment">/*</span>
<a name="l00017"></a>00017 <span class="comment"> * arrayaccess.c</span>
<a name="l00018"></a>00018 <span class="comment"> *</span>
<a name="l00019"></a>00019 <span class="comment"> * Access within an array of 32-bit words</span>
<a name="l00020"></a>00020 <span class="comment"> *</span>
<a name="l00021"></a>00021 <span class="comment"> * l_int32 l_getDataBit()</span>
<a name="l00022"></a>00022 <span class="comment"> * void l_setDataBit()</span>
<a name="l00023"></a>00023 <span class="comment"> * void l_clearDataBit()</span>
<a name="l00024"></a>00024 <span class="comment"> * void l_setDataBitVal()</span>
<a name="l00025"></a>00025 <span class="comment"> * l_int32 l_getDataDibit()</span>
<a name="l00026"></a>00026 <span class="comment"> * void l_setDataDibit()</span>
<a name="l00027"></a>00027 <span class="comment"> * void l_clearDataDibit()</span>
<a name="l00028"></a>00028 <span class="comment"> * l_int32 l_getDataQbit()</span>
<a name="l00029"></a>00029 <span class="comment"> * void l_setDataQbit()</span>
<a name="l00030"></a>00030 <span class="comment"> * void l_clearDataQbit()</span>
<a name="l00031"></a>00031 <span class="comment"> * l_int32 l_getDataByte()</span>
<a name="l00032"></a>00032 <span class="comment"> * void l_setDataByte()</span>
<a name="l00033"></a>00033 <span class="comment"> * l_int32 l_getDataTwoBytes()</span>
<a name="l00034"></a>00034 <span class="comment"> * void l_setDataTwoBytes()</span>
<a name="l00035"></a>00035 <span class="comment"> * l_int32 l_getDataFourBytes()</span>
<a name="l00036"></a>00036 <span class="comment"> * void l_setDataFourBytes()</span>
<a name="l00037"></a>00037 <span class="comment"> *</span>
<a name="l00038"></a>00038 <span class="comment"> * Note that these all require 32-bit alignment, and hence an input</span>
<a name="l00039"></a>00039 <span class="comment"> * ptr to l_uint32. However, this is not enforced by the compiler.</span>
<a name="l00040"></a>00040 <span class="comment"> * Instead, we allow the use of a void* ptr, because the line ptrs</span>
<a name="l00041"></a>00041 <span class="comment"> * are an efficient way to get random access (see pixGetLinePtrs()).</span>
<a name="l00042"></a>00042 <span class="comment"> * It is then necessary to cast internally within each function</span>
<a name="l00043"></a>00043 <span class="comment"> * because ptr arithmetic requires knowing the size of the units</span>
<a name="l00044"></a>00044 <span class="comment"> * being referenced.</span>
<a name="l00045"></a>00045 <span class="comment"> */</span>
<a name="l00046"></a>00046
<a name="l00047"></a>00047 <span class="preprocessor">#include <stdio.h></span>
<a name="l00048"></a>00048 <span class="preprocessor">#include "<a class="code" href="allheaders_8h.html" title="Includes all required Leptonica header files.">allheaders.h</a>"</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">/*----------------------------------------------------------------------*</span>
<a name="l00052"></a>00052 <span class="comment"> * Access within an array of 32-bit words *</span>
<a name="l00053"></a>00053 <span class="comment"> *----------------------------------------------------------------------*/</span><span class="comment"></span>
<a name="l00054"></a>00054 <span class="comment">/*!</span>
<a name="l00055"></a>00055 <span class="comment"> * l_getDataBit()</span>
<a name="l00056"></a>00056 <span class="comment"> *</span>
<a name="l00057"></a>00057 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00058"></a>00058 <span class="comment"> * n (pixel index)</span>
<a name="l00059"></a>00059 <span class="comment"> * Return: val of the nth (1-bit) pixel.</span>
<a name="l00060"></a>00060 <span class="comment"> */</span>
<a name="l00061"></a>00061 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00062"></a><a class="code" href="leptprotos_8h.html#a56ea3daa81a55f3be2133e4b2389bb7e">00062</a> <a class="code" href="arrayaccess_8c.html#a74835565d58b464361c05742b6edc8fd">l_getDataBit</a>(<span class="keywordtype">void</span> *line,
<a name="l00063"></a>00063 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00064"></a>00064 {
<a name="l00065"></a>00065 <span class="keywordflow">return</span> (*((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 5)) >> (31 - (n & 31))) & 1;
<a name="l00066"></a>00066 }
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="comment"></span>
<a name="l00069"></a>00069 <span class="comment">/*!</span>
<a name="l00070"></a>00070 <span class="comment"> * l_setDataBit()</span>
<a name="l00071"></a>00071 <span class="comment"> *</span>
<a name="l00072"></a>00072 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00073"></a>00073 <span class="comment"> * n (pixel index)</span>
<a name="l00074"></a>00074 <span class="comment"> * Return: void</span>
<a name="l00075"></a>00075 <span class="comment"> *</span>
<a name="l00076"></a>00076 <span class="comment"> * Action: sets the pixel to 1</span>
<a name="l00077"></a>00077 <span class="comment"> */</span>
<a name="l00078"></a>00078 <span class="keywordtype">void</span>
<a name="l00079"></a><a class="code" href="leptprotos_8h.html#a4cc9905b465901aad0f1bddc671c1c72">00079</a> <a class="code" href="arrayaccess_8c.html#a57145bffe40a9456689a73ded77c644a">l_setDataBit</a>(<span class="keywordtype">void</span> *line,
<a name="l00080"></a>00080 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 *((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 5)) |= (0x80000000 >> (n & 31));
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="comment"></span>
<a name="l00086"></a>00086 <span class="comment">/*!</span>
<a name="l00087"></a>00087 <span class="comment"> * l_clearDataBit()</span>
<a name="l00088"></a>00088 <span class="comment"> *</span>
<a name="l00089"></a>00089 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00090"></a>00090 <span class="comment"> * n (pixel index)</span>
<a name="l00091"></a>00091 <span class="comment"> * Return: void</span>
<a name="l00092"></a>00092 <span class="comment"> *</span>
<a name="l00093"></a>00093 <span class="comment"> * Action: sets the (1-bit) pixel to 0</span>
<a name="l00094"></a>00094 <span class="comment"> */</span>
<a name="l00095"></a>00095 <span class="keywordtype">void</span>
<a name="l00096"></a><a class="code" href="leptprotos_8h.html#adc85d8dd064b72f331fd0ae877a4bb2b">00096</a> <a class="code" href="arrayaccess_8c.html#a01a655313a7adbb9afbbe10fe1eecbd0">l_clearDataBit</a>(<span class="keywordtype">void</span> *line,
<a name="l00097"></a>00097 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00098"></a>00098 {
<a name="l00099"></a>00099 *((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 5)) &= ~(0x80000000 >> (n & 31));
<a name="l00100"></a>00100 }
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="comment"></span>
<a name="l00103"></a>00103 <span class="comment">/*!</span>
<a name="l00104"></a>00104 <span class="comment"> * l_setDataBitVal()</span>
<a name="l00105"></a>00105 <span class="comment"> *</span>
<a name="l00106"></a>00106 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00107"></a>00107 <span class="comment"> * n (pixel index)</span>
<a name="l00108"></a>00108 <span class="comment"> * val (val to be inserted: 0 or 1)</span>
<a name="l00109"></a>00109 <span class="comment"> * Return: void</span>
<a name="l00110"></a>00110 <span class="comment"> *</span>
<a name="l00111"></a>00111 <span class="comment"> * Notes:</span>
<a name="l00112"></a>00112 <span class="comment"> * (1) This is an accessor for a 1 bpp pix.</span>
<a name="l00113"></a>00113 <span class="comment"> * (2) It is actually a little slower than using:</span>
<a name="l00114"></a>00114 <span class="comment"> * if (val == 0)</span>
<a name="l00115"></a>00115 <span class="comment"> * l_ClearDataBit(line, n);</span>
<a name="l00116"></a>00116 <span class="comment"> * else</span>
<a name="l00117"></a>00117 <span class="comment"> * l_SetDataBit(line, n);</span>
<a name="l00118"></a>00118 <span class="comment"> */</span>
<a name="l00119"></a>00119 <span class="keywordtype">void</span>
<a name="l00120"></a><a class="code" href="leptprotos_8h.html#ab151358a6d1d9881662bfd6ee324d9d1">00120</a> <a class="code" href="arrayaccess_8c.html#a19cc639c2835c062d3cbb26808b877cf">l_setDataBitVal</a>(<span class="keywordtype">void</span> *line,
<a name="l00121"></a>00121 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n,
<a name="l00122"></a>00122 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> val)
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *pword;
<a name="l00125"></a>00125
<a name="l00126"></a>00126 pword = (<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 5);
<a name="l00127"></a>00127 *pword &= ~(0x80000000 >> (n & 31)); <span class="comment">/* clear */</span>
<a name="l00128"></a>00128 *pword |= val << (31 - (n & 31)); <span class="comment">/* set */</span>
<a name="l00129"></a>00129 <span class="keywordflow">return</span>;
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131
<a name="l00132"></a>00132 <span class="comment"></span>
<a name="l00133"></a>00133 <span class="comment">/*!</span>
<a name="l00134"></a>00134 <span class="comment"> * l_getDataDibit()</span>
<a name="l00135"></a>00135 <span class="comment"> *</span>
<a name="l00136"></a>00136 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00137"></a>00137 <span class="comment"> * n (pixel index)</span>
<a name="l00138"></a>00138 <span class="comment"> * Return: val of the nth (2-bit) pixel.</span>
<a name="l00139"></a>00139 <span class="comment"> */</span>
<a name="l00140"></a>00140 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00141"></a><a class="code" href="leptprotos_8h.html#a4145754d6c3c7992522af77a8d87e602">00141</a> <a class="code" href="arrayaccess_8c.html#adb48f70e078f0db74f6b3bccdefceb8e">l_getDataDibit</a>(<span class="keywordtype">void</span> *line,
<a name="l00142"></a>00142 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00143"></a>00143 {
<a name="l00144"></a>00144 <span class="keywordflow">return</span> (*((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 4)) >> (2 * (15 - (n & 15)))) & 3;
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="comment"></span>
<a name="l00148"></a>00148 <span class="comment">/*!</span>
<a name="l00149"></a>00149 <span class="comment"> * l_setDataDibit()</span>
<a name="l00150"></a>00150 <span class="comment"> *</span>
<a name="l00151"></a>00151 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00152"></a>00152 <span class="comment"> * n (pixel index)</span>
<a name="l00153"></a>00153 <span class="comment"> * val (val to be inserted: 0 - 3)</span>
<a name="l00154"></a>00154 <span class="comment"> * Return: void</span>
<a name="l00155"></a>00155 <span class="comment"> */</span>
<a name="l00156"></a>00156 <span class="keywordtype">void</span>
<a name="l00157"></a><a class="code" href="leptprotos_8h.html#a1dcad013dc0b07c820986c1b162acc79">00157</a> <a class="code" href="arrayaccess_8c.html#a1d05e2b7f75f5249a5576cd69c9e524a">l_setDataDibit</a>(<span class="keywordtype">void</span> *line,
<a name="l00158"></a>00158 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n,
<a name="l00159"></a>00159 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> val)
<a name="l00160"></a>00160 {
<a name="l00161"></a>00161 <a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *pword;
<a name="l00162"></a>00162
<a name="l00163"></a>00163 pword = (<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 4);
<a name="l00164"></a>00164 *pword &= ~(0xc0000000 >> (2 * (n & 15))); <span class="comment">/* clear */</span>
<a name="l00165"></a>00165 *pword |= (val & 3) << (30 - 2 * (n & 15)); <span class="comment">/* set */</span>
<a name="l00166"></a>00166 <span class="keywordflow">return</span>;
<a name="l00167"></a>00167 }
<a name="l00168"></a>00168
<a name="l00169"></a>00169 <span class="comment"></span>
<a name="l00170"></a>00170 <span class="comment">/*!</span>
<a name="l00171"></a>00171 <span class="comment"> * l_clearDataDibit()</span>
<a name="l00172"></a>00172 <span class="comment"> *</span>
<a name="l00173"></a>00173 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00174"></a>00174 <span class="comment"> * n (pixel index)</span>
<a name="l00175"></a>00175 <span class="comment"> * Return: void</span>
<a name="l00176"></a>00176 <span class="comment"> *</span>
<a name="l00177"></a>00177 <span class="comment"> * Action: sets the (2-bit) pixel to 0</span>
<a name="l00178"></a>00178 <span class="comment"> */</span>
<a name="l00179"></a>00179 <span class="keywordtype">void</span>
<a name="l00180"></a><a class="code" href="leptprotos_8h.html#a61b27abcb88921187de20c8710d4f69f">00180</a> <a class="code" href="arrayaccess_8c.html#a2c0b86d0d7ab65b905eae80444628e57">l_clearDataDibit</a>(<span class="keywordtype">void</span> *line,
<a name="l00181"></a>00181 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00182"></a>00182 {
<a name="l00183"></a>00183 *((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 4)) &= ~(0xc0000000 >> (2 * (n & 15)));
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185
<a name="l00186"></a>00186 <span class="comment"></span>
<a name="l00187"></a>00187 <span class="comment">/*!</span>
<a name="l00188"></a>00188 <span class="comment"> * l_getDataQbit()</span>
<a name="l00189"></a>00189 <span class="comment"> *</span>
<a name="l00190"></a>00190 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00191"></a>00191 <span class="comment"> * n (pixel index)</span>
<a name="l00192"></a>00192 <span class="comment"> * Return: val of the nth (4-bit) pixel.</span>
<a name="l00193"></a>00193 <span class="comment"> */</span>
<a name="l00194"></a>00194 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00195"></a><a class="code" href="leptprotos_8h.html#ae0c7175fac2c9a1aab0c77ac449be9c2">00195</a> <a class="code" href="arrayaccess_8c.html#ade87e9314b416d69f6f9db46a94a168d">l_getDataQbit</a>(<span class="keywordtype">void</span> *line,
<a name="l00196"></a>00196 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00197"></a>00197 {
<a name="l00198"></a>00198 <span class="keywordflow">return</span> (*((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 3)) >> (4 * (7 - (n & 7)))) & 0xf;
<a name="l00199"></a>00199 }
<a name="l00200"></a>00200
<a name="l00201"></a>00201 <span class="comment"></span>
<a name="l00202"></a>00202 <span class="comment">/*!</span>
<a name="l00203"></a>00203 <span class="comment"> * l_setDataQbit()</span>
<a name="l00204"></a>00204 <span class="comment"> *</span>
<a name="l00205"></a>00205 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00206"></a>00206 <span class="comment"> * n (pixel index)</span>
<a name="l00207"></a>00207 <span class="comment"> * val (val to be inserted: 0 - 0xf)</span>
<a name="l00208"></a>00208 <span class="comment"> * Return: void</span>
<a name="l00209"></a>00209 <span class="comment"> */</span>
<a name="l00210"></a>00210 <span class="keywordtype">void</span>
<a name="l00211"></a><a class="code" href="leptprotos_8h.html#a34da3db378ddead756d440b39dda5935">00211</a> <a class="code" href="arrayaccess_8c.html#ae2605bb061039dc52eebb940946e1977">l_setDataQbit</a>(<span class="keywordtype">void</span> *line,
<a name="l00212"></a>00212 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n,
<a name="l00213"></a>00213 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> val)
<a name="l00214"></a>00214 {
<a name="l00215"></a>00215 <a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *pword;
<a name="l00216"></a>00216
<a name="l00217"></a>00217 pword = (<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 3);
<a name="l00218"></a>00218 *pword &= ~(0xf0000000 >> (4 * (n & 7))); <span class="comment">/* clear */</span>
<a name="l00219"></a>00219 *pword |= (val & 15) << (28 - 4 * (n & 7)); <span class="comment">/* set */</span>
<a name="l00220"></a>00220 <span class="keywordflow">return</span>;
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00223"></a>00223 <span class="comment"></span>
<a name="l00224"></a>00224 <span class="comment">/*!</span>
<a name="l00225"></a>00225 <span class="comment"> * l_clearDataQbit()</span>
<a name="l00226"></a>00226 <span class="comment"> *</span>
<a name="l00227"></a>00227 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00228"></a>00228 <span class="comment"> * n (pixel index)</span>
<a name="l00229"></a>00229 <span class="comment"> * Return: void</span>
<a name="l00230"></a>00230 <span class="comment"> *</span>
<a name="l00231"></a>00231 <span class="comment"> * Action: sets the (4-bit) pixel to 0</span>
<a name="l00232"></a>00232 <span class="comment"> */</span>
<a name="l00233"></a>00233 <span class="keywordtype">void</span>
<a name="l00234"></a><a class="code" href="leptprotos_8h.html#a96413003bf5e691374caf8f678e89124">00234</a> <a class="code" href="arrayaccess_8c.html#a30f8193aa1a96b13e44dee74e085768f">l_clearDataQbit</a>(<span class="keywordtype">void</span> *line,
<a name="l00235"></a>00235 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 *((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + (n >> 3)) &= ~(0xf0000000 >> (4 * (n & 7)));
<a name="l00238"></a>00238 }
<a name="l00239"></a>00239
<a name="l00240"></a>00240 <span class="comment"></span>
<a name="l00241"></a>00241 <span class="comment">/*!</span>
<a name="l00242"></a>00242 <span class="comment"> * l_getDataByte()</span>
<a name="l00243"></a>00243 <span class="comment"> *</span>
<a name="l00244"></a>00244 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00245"></a>00245 <span class="comment"> * n (pixel index)</span>
<a name="l00246"></a>00246 <span class="comment"> * Return: value of the n-th (byte) pixel</span>
<a name="l00247"></a>00247 <span class="comment"> */</span>
<a name="l00248"></a>00248 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00249"></a><a class="code" href="leptprotos_8h.html#aca0c37ae826caa890dbe327273ac7755">00249</a> <a class="code" href="arrayaccess_8c.html#ab50a389606faaedd0958ed3cb21220f7">l_getDataByte</a>(<span class="keywordtype">void</span> *line,
<a name="l00250"></a>00250 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00251"></a>00251 {
<a name="l00252"></a>00252 <span class="preprocessor">#ifdef L_BIG_ENDIAN</span>
<a name="l00253"></a>00253 <span class="preprocessor"></span> <span class="keywordflow">return</span> *((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)line + n);
<a name="l00254"></a>00254 <span class="preprocessor">#else </span><span class="comment">/* L_LITTLE_ENDIAN */</span>
<a name="l00255"></a>00255 <span class="keywordflow">return</span> *(<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)((<a class="code" href="environ_8h.html#a714c1eece011324f973d9f38a4b1b34d">l_uintptr_t</a>)((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)line + n) ^ 3);
<a name="l00256"></a>00256 <span class="preprocessor">#endif </span><span class="comment">/* L_BIG_ENDIAN */</span>
<a name="l00257"></a>00257 }
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="comment"></span>
<a name="l00260"></a>00260 <span class="comment">/*!</span>
<a name="l00261"></a>00261 <span class="comment"> * l_setDataByte()</span>
<a name="l00262"></a>00262 <span class="comment"> *</span>
<a name="l00263"></a>00263 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00264"></a>00264 <span class="comment"> * n (pixel index)</span>
<a name="l00265"></a>00265 <span class="comment"> * val (val to be inserted: 0 - 0xff)</span>
<a name="l00266"></a>00266 <span class="comment"> * Return: void</span>
<a name="l00267"></a>00267 <span class="comment"> */</span>
<a name="l00268"></a>00268 <span class="keywordtype">void</span>
<a name="l00269"></a><a class="code" href="leptprotos_8h.html#a4e5b0dfd9d217b39179739630753af26">00269</a> <a class="code" href="arrayaccess_8c.html#a52a05edfee364e3c1a5a46af0c3a445f">l_setDataByte</a>(<span class="keywordtype">void</span> *line,
<a name="l00270"></a>00270 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n,
<a name="l00271"></a>00271 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> val)
<a name="l00272"></a>00272 {
<a name="l00273"></a>00273 <span class="preprocessor">#ifdef L_BIG_ENDIAN</span>
<a name="l00274"></a>00274 <span class="preprocessor"></span> *((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)line + n) = val;
<a name="l00275"></a>00275 <span class="preprocessor">#else </span><span class="comment">/* L_LITTLE_ENDIAN */</span>
<a name="l00276"></a>00276 *(<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)((<a class="code" href="environ_8h.html#a714c1eece011324f973d9f38a4b1b34d">l_uintptr_t</a>)((<a class="code" href="environ_8h.html#a7ed60554e7d6dd89aca643189b1e70ad">l_uint8</a> *)line + n) ^ 3) = val;
<a name="l00277"></a>00277 <span class="preprocessor">#endif </span><span class="comment">/* L_BIG_ENDIAN */</span>
<a name="l00278"></a>00278 }
<a name="l00279"></a>00279
<a name="l00280"></a>00280 <span class="comment"></span>
<a name="l00281"></a>00281 <span class="comment">/*!</span>
<a name="l00282"></a>00282 <span class="comment"> * l_getDataTwoBytes()</span>
<a name="l00283"></a>00283 <span class="comment"> *</span>
<a name="l00284"></a>00284 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00285"></a>00285 <span class="comment"> * n (pixel index)</span>
<a name="l00286"></a>00286 <span class="comment"> * Return: value of the n-th (2-byte) pixel</span>
<a name="l00287"></a>00287 <span class="comment"> */</span>
<a name="l00288"></a>00288 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00289"></a><a class="code" href="leptprotos_8h.html#a822656a0dec8c1ec6fc85112fdf4a503">00289</a> <a class="code" href="arrayaccess_8c.html#a4bc49509cb772087869c77b74da310e9">l_getDataTwoBytes</a>(<span class="keywordtype">void</span> *line,
<a name="l00290"></a>00290 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00291"></a>00291 {
<a name="l00292"></a>00292 <span class="preprocessor">#ifdef L_BIG_ENDIAN</span>
<a name="l00293"></a>00293 <span class="preprocessor"></span> <span class="keywordflow">return</span> *((<a class="code" href="environ_8h.html#a44325897ae2a352c62931134b7c7b6a2">l_uint16</a> *)line + n);
<a name="l00294"></a>00294 <span class="preprocessor">#else </span><span class="comment">/* L_LITTLE_ENDIAN */</span>
<a name="l00295"></a>00295 <span class="keywordflow">return</span> *(<a class="code" href="environ_8h.html#a44325897ae2a352c62931134b7c7b6a2">l_uint16</a> *)((<a class="code" href="environ_8h.html#a714c1eece011324f973d9f38a4b1b34d">l_uintptr_t</a>)((<a class="code" href="environ_8h.html#a44325897ae2a352c62931134b7c7b6a2">l_uint16</a> *)line + n) ^ 2);
<a name="l00296"></a>00296 <span class="preprocessor">#endif </span><span class="comment">/* L_BIG_ENDIAN */</span>
<a name="l00297"></a>00297 }
<a name="l00298"></a>00298
<a name="l00299"></a>00299 <span class="comment"></span>
<a name="l00300"></a>00300 <span class="comment">/*!</span>
<a name="l00301"></a>00301 <span class="comment"> * l_setDataTwoBytes()</span>
<a name="l00302"></a>00302 <span class="comment"> *</span>
<a name="l00303"></a>00303 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00304"></a>00304 <span class="comment"> * n (pixel index)</span>
<a name="l00305"></a>00305 <span class="comment"> * val (val to be inserted: 0 - 0xffff)</span>
<a name="l00306"></a>00306 <span class="comment"> * Return: void</span>
<a name="l00307"></a>00307 <span class="comment"> */</span>
<a name="l00308"></a>00308 <span class="keywordtype">void</span>
<a name="l00309"></a><a class="code" href="leptprotos_8h.html#a1583ecb289e28aeb7e34f8329861559d">00309</a> <a class="code" href="arrayaccess_8c.html#a2993f5282e6756b53d17e8faab8840f9">l_setDataTwoBytes</a>(<span class="keywordtype">void</span> *line,
<a name="l00310"></a>00310 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n,
<a name="l00311"></a>00311 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> val)
<a name="l00312"></a>00312 {
<a name="l00313"></a>00313 <span class="preprocessor">#ifdef L_BIG_ENDIAN</span>
<a name="l00314"></a>00314 <span class="preprocessor"></span> *((<a class="code" href="environ_8h.html#a44325897ae2a352c62931134b7c7b6a2">l_uint16</a> *)line + n) = val;
<a name="l00315"></a>00315 <span class="preprocessor">#else </span><span class="comment">/* L_LITTLE_ENDIAN */</span>
<a name="l00316"></a>00316 *(<a class="code" href="environ_8h.html#a44325897ae2a352c62931134b7c7b6a2">l_uint16</a> *)((<a class="code" href="environ_8h.html#a714c1eece011324f973d9f38a4b1b34d">l_uintptr_t</a>)((<a class="code" href="environ_8h.html#a44325897ae2a352c62931134b7c7b6a2">l_uint16</a> *)line + n) ^ 2) = val;
<a name="l00317"></a>00317 <span class="preprocessor">#endif </span><span class="comment">/* L_BIG_ENDIAN */</span>
<a name="l00318"></a>00318 }
<a name="l00319"></a>00319
<a name="l00320"></a>00320 <span class="comment"></span>
<a name="l00321"></a>00321 <span class="comment">/*!</span>
<a name="l00322"></a>00322 <span class="comment"> * l_getDataFourBytes()</span>
<a name="l00323"></a>00323 <span class="comment"> *</span>
<a name="l00324"></a>00324 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00325"></a>00325 <span class="comment"> * n (pixel index)</span>
<a name="l00326"></a>00326 <span class="comment"> * Return: value of the n-th (4-byte) pixel</span>
<a name="l00327"></a>00327 <span class="comment"> */</span>
<a name="l00328"></a>00328 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a>
<a name="l00329"></a><a class="code" href="leptprotos_8h.html#a2315a1765651f38fd5d26202bfdc7aec">00329</a> <a class="code" href="arrayaccess_8c.html#aaac4c6a17928cdcdd13b66ba7b797302">l_getDataFourBytes</a>(<span class="keywordtype">void</span> *line,
<a name="l00330"></a>00330 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n)
<a name="l00331"></a>00331 {
<a name="l00332"></a>00332 <span class="keywordflow">return</span> *((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + n);
<a name="l00333"></a>00333 }
<a name="l00334"></a>00334
<a name="l00335"></a>00335 <span class="comment"></span>
<a name="l00336"></a>00336 <span class="comment">/*!</span>
<a name="l00337"></a>00337 <span class="comment"> * l_setDataFourBytes()</span>
<a name="l00338"></a>00338 <span class="comment"> *</span>
<a name="l00339"></a>00339 <span class="comment"> * Input: line (ptr to beginning of data line)</span>
<a name="l00340"></a>00340 <span class="comment"> * n (pixel index)</span>
<a name="l00341"></a>00341 <span class="comment"> * val (val to be inserted: 0 - 0xffffffff)</span>
<a name="l00342"></a>00342 <span class="comment"> * Return: void</span>
<a name="l00343"></a>00343 <span class="comment"> */</span>
<a name="l00344"></a>00344 <span class="keywordtype">void</span>
<a name="l00345"></a><a class="code" href="leptprotos_8h.html#a1a8f6b900076d36463f82aeb845016a8">00345</a> <a class="code" href="arrayaccess_8c.html#a1d750fb8003a5ff7117333bcc0a7b3af">l_setDataFourBytes</a>(<span class="keywordtype">void</span> *line,
<a name="l00346"></a>00346 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> n,
<a name="l00347"></a>00347 <a class="code" href="environ_8h.html#a9085c7874153c280a4171244aa052e4e">l_int32</a> val)
<a name="l00348"></a>00348 {
<a name="l00349"></a>00349 *((<a class="code" href="environ_8h.html#a4d4d7254020fc95aef5dde8884405358">l_uint32</a> *)line + n) = val;
<a name="l00350"></a>00350 }
<a name="l00351"></a>00351
<a name="l00352"></a>00352
<a name="l00353"></a>00353
</pre></div></div>
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