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<hr><h1>scs2mpf.c</h1><div class="fragment"><pre>00001 <font class="comment">/*</font>
00002 <font class="comment"> * Author : Defour David</font>
00003 <font class="comment"> * Contact : David.Defour@ens-lyon.fr</font>
00004 <font class="comment"> *</font>
00005 <font class="comment"> * This program is free software; you can redistribute it and/or modify</font>
00006 <font class="comment"> * it under the terms of the GNU Lesser General Public License as published by</font>
00007 <font class="comment"> * the Free Software Foundation; either version 2 of the License, or </font>
00008 <font class="comment"> * (at your option) any later version.</font>
00009 <font class="comment"> * </font>
00010 <font class="comment"> * This program is distributed in the hope that it will be useful,</font>
00011 <font class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00012 <font class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</font>
00013 <font class="comment"> * GNU General Public License for more details.</font>
00014 <font class="comment"> *</font>
00015 <font class="comment"> * You should have received a copy of the GNU Lesser General Public License</font>
00016 <font class="comment"> * along with this program; if not, write to the Free Software</font>
00017 <font class="comment"> * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. </font>
00018 <font class="comment"> */</font>
00019
00020
00021 <font class="preprocessor">#include "<a class="code" href="scs_8h.html">scs.h</a>"</font>
00022 <font class="preprocessor">#include "<a class="code" href="scs__private_8h.html">scs_private.h</a>"</font>
00023
00024 <font class="comment">/* Compile only if gmp is present */</font>
00025
00026 <font class="preprocessor">#ifdef HAVE_GMP_H</font>
00027 <font class="preprocessor"></font>
00028 <font class="comment">/*</font>
00029 <font class="comment"> * Convert a scs number into a MPF number (GMP)</font>
00030 <font class="comment"> */</font>
00031 <font class="keywordtype">void</font> scs_get_mpf(<a class="code" href="structscs.html">scs_ptr</a> x, mpf_t rop){
00032 mpf_t mp1;
00033 <font class="keywordtype">long</font> <font class="keywordtype">int</font> expo;
00034 <font class="keywordtype">int</font> i;
00035
00036 mpf_set_ui(rop, 0);
00037
00038 <font class="comment">/* mantissa */</font>
00039 <font class="keywordflow">for</font> (i=0; i<SCS_NB_WORDS; i++){
00040 mpf_mul_2exp(rop, rop, SCS_NB_BITS);
00041 mpf_add_ui(rop, rop, X_HW[i]);
00042 }
00043
00044 <font class="comment">/* sign */</font>
00045 <font class="keywordflow">if</font> (X_SGN == -1) mpf_neg(rop, rop);
00046
00047 <font class="comment">/* exception */</font>
00048 mpf_init_set_d(mp1, X_EXP); mpf_mul(rop, rop, mp1);
00049
00050 <font class="comment">/* exponent */</font>
00051 expo = (X_IND - SCS_NB_WORDS + 1) * SCS_NB_BITS;
00052
00053 <font class="keywordflow">if</font> (expo < 0) mpf_div_2exp(rop, rop, (<font class="keywordtype">unsigned</font> <font class="keywordtype">int</font>) -expo);
00054 <font class="keywordflow">else</font> mpf_mul_2exp(rop, rop, (<font class="keywordtype">unsigned</font> <font class="keywordtype">int</font>) expo);
00055
00056 mpf_clear(mp1);
00057 }
00058 <font class="preprocessor">#endif </font><font class="comment">/*HAVE_GMP_H*/</font>
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