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Tina5/tina-libs/tina/math/mathMatr_unit.c

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  1 /**********
  2  *
  3  * Copyright (c) 2003, Division of Imaging Science and Biomedical Engineering,
  4  * University of Manchester, UK.  All rights reserved.
  5  * 
  6  * Redistribution and use in source and binary forms, with or without modification, 
  7  * are permitted provided that the following conditions are met:
  8  * 
  9  *   . Redistributions of source code must retain the above copyright notice, 
 10  *     this list of conditions and the following disclaimer.
 11  *    
 12  *   . Redistributions in binary form must reproduce the above copyright notice,
 13  *     this list of conditions and the following disclaimer in the documentation 
 14  *     and/or other materials provided with the distribution.
 15  * 
 16  *   . Neither the name of the University of Manchester nor the names of its
 17  *     contributors may be used to endorse or promote products derived from this 
 18  *     software without specific prior written permission.
 19  * 
 20  * 
 21  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 22  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE 
 25  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 31  * POSSIBILITY OF SUCH DAMAGE.
 32  *
 33  **********
 34  *
 35  * Program :    TINA
 36  * File    :  $Source: /home/tina/cvs/tina-libs/tina/math/mathMatr_unit.c,v $
 37  * Date    :  $Date: 2003/09/23 11:32:20 $
 38  * Version :  $Revision: 1.4 $
 39  * CVS Id  :  $Id: mathMatr_unit.c,v 1.4 2003/09/23 11:32:20 matts Exp $
 40  *
 41  * Author  :  Legacy TINA
 42  *
 43  * Notes : Unit matrix
 44  *
 45  *********
 46 */
 47 /** 
 48  *  @file
 49  *  @brief  Create a matrix with 1's in the leading diagonal, 0's elsewhere.    
 50  *
 51  *
 52  * 
 53 */
 54 
 55 #include "mathMatr_unit.h"
 56 
 57 #if HAVE_CONFIG_H
 58 #include <config.h>
 59 #endif
 60 
 61 #include <tina/sys/sysDef.h>
 62 #include <tina/sys/sysPro.h>
 63 #include <tina/math/math_MatrDef.h>
 64 #include <tina/math/mathMatr_alloc.h>
 65 #include <tina/math/mathMatr_put.h>
 66 
 67 Matrix         *matrix_unit(int m, int n, Matrix_shape shape, Vartype vtype)
 68 {
 69         Matrix         *unit;
 70         int             i;
 71 
 72         if (m < 0 || n < 0)
 73         {
 74                 error("matrix_unit: bad array bound", non_fatal);
 75                 return (NULL);
 76         }
 77         if (m == 0 || n == 0)
 78         {
 79                 error("matrix_unit: zero array bound", warning);
 80                 return (NULL);
 81         }
 82         unit = matrix_alloc(m, n, shape, vtype);
 83         for (i = 0; i < MIN(m, n); ++i)
 84                 matrix_put(1, unit, i, i);
 85 
 86         return (unit);
 87 }
 88 

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