/[escript]/trunk/paso/src/SystemMatrix_loadMM.c
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Annotation of /trunk/paso/src/SystemMatrix_loadMM.c

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Revision 631 - (hide annotations)
Thu Mar 23 04:27:32 2006 UTC (13 years, 5 months ago) by dhawcroft
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File size: 8084 byte(s)
Prepended all paso source files with new Copyright notice
1 jgs 150 /* $Id$ */
2    
3 dhawcroft 631
4     /*
5     ********************************************************************************
6     * Copyright © 2006 by ACcESS MNRF *
7     * *
8     * http://www.access.edu.au *
9     * Primary Business: Queensland, Australia *
10     * Licensed under the Open Software License version 3.0 *
11     * http://www.opensource.org/licenses/osl-3.0.php *
12     ********************************************************************************
13     */
14    
15 jgs 150 /**************************************************************/
16    
17     /* Paso: Matrix Market format is loaded to a SystemMatrix */
18    
19     /**************************************************************/
20    
21     /* Copyrights by ACcESS Australia 2003,2004,2005 */
22     /* Author: imran@access.edu.au */
23    
24     /**************************************************************/
25    
26     #include "Paso.h"
27     #include "mmio.h"
28     #include "SystemMatrix.h"
29    
30     static void swap( index_t*, index_t*, double*, int, int );
31     static void q_sort( index_t*, index_t*, double*, int, int );
32     static void print_entries( index_t*, index_t*, double* );
33    
34     static int M, N, nz;
35    
36    
37     /* debug: print the entries */
38     void print_entries( index_t *r, index_t *c, double *v )
39     {
40     int i;
41    
42     for( i=0; i<nz; i++ )
43     {
44     printf( "(%ld, %ld) == %e\n", (long)r[i], (long)c[i], v[i] );
45     }
46     }
47    
48     /* swap function */
49     void swap( index_t *r, index_t *c, double *v, int left, int right )
50     {
51     double v_temp;
52     index_t temp;
53    
54     temp = r[left];
55     r[left] = r[right];
56     r[right] = temp;
57    
58     temp = c[left];
59     c[left] = c[right];
60     c[right] = temp;
61    
62     v_temp = v[left];
63     v[left] = v[right];
64     v[right] = v_temp;
65     }
66    
67     void q_sort( index_t *row, index_t *col, double *val, int begin, int end )
68     {
69     int l, r;
70     index_t pivot, lval;
71    
72     if( end > begin )
73     {
74     pivot = N * row[begin] + col[begin];
75     l = begin + 1;
76     r = end;
77    
78     while( l < r )
79     {
80     lval = N * row[l] + col[l];
81     if( lval < pivot )
82     l++;
83     else
84     {
85     r--;
86     swap( row, col, val, l, r );
87     }
88     }
89     l--;
90     swap( row, col, val, begin, l );
91     q_sort( row, col, val, begin, l );
92     q_sort( row, col, val, r, end );
93     }
94     }
95    
96     Paso_SystemMatrix* Paso_SystemMatrix_loadMM_toCSR( char *fileName_p )
97     {
98     int i, curr_row;
99     MM_typecode matrixCode;
100     Paso_resetError();
101    
102     index_t *col_ind = NULL;
103     index_t *row_ind = NULL;
104     index_t *row_ptr = NULL;
105     double *val = NULL;
106    
107     Paso_SystemMatrixPattern *loc_pattern = NULL;
108     Paso_SystemMatrix *out = NULL;
109    
110     /* open the file */
111     FILE *fileHandle_p = fopen( fileName_p, "r" );
112     if( fileHandle_p == NULL )
113     {
114 gross 415 Paso_setError(IO_ERROR, "Paso_SystemMatrix_loadMM_toCSR: Cannot read file for reading.");
115 jgs 150 return NULL;
116     }
117    
118     /* process banner */
119     if( mm_read_banner(fileHandle_p, &matrixCode) != 0 )
120     {
121 gross 415 Paso_setError(IO_ERROR, "Paso_SystemMatrix_loadMM_toCSR: Error processing MM banner.");
122 jgs 150 fclose( fileHandle_p );
123     return NULL;
124     }
125     if( !(mm_is_real(matrixCode) && mm_is_sparse(matrixCode) && mm_is_general(matrixCode)) )
126     {
127 gross 415
128     Paso_setError(TYPE_ERROR,"Paso_SystemMatrix_loadMM_toCSR: found Matrix Market type is not supported.");
129 jgs 150 fclose( fileHandle_p );
130     return NULL;
131     }
132    
133     /* get matrix size */
134     if( mm_read_mtx_crd_size(fileHandle_p, &M, &N, &nz) != 0 )
135     {
136 gross 415 Paso_setError(IO_ERROR, "Paso_SystemMatrix_loadMM_toCSR: Could not parse matrix size");
137 jgs 150 fclose( fileHandle_p );
138     return NULL;
139     }
140    
141     /* prepare storage */
142     col_ind = MEMALLOC( nz, index_t );
143     row_ind = MEMALLOC( nz, index_t );
144     val = MEMALLOC( nz, double );
145    
146     row_ptr = MEMALLOC( (M+1), index_t );
147    
148     if( col_ind == NULL || row_ind == NULL || val == NULL || row_ptr == NULL )
149     {
150 gross 415 Paso_setError(MEMORY_ERROR, "Paso_SystemMatrix_loadMM_toCSR: Could not allocate memory" );
151 jgs 150
152     fclose( fileHandle_p );
153     return NULL;
154     }
155    
156     /* perform actual read of elements */
157     for( i=0; i<nz; i++ )
158     {
159     fscanf( fileHandle_p, "%d %d %le\n", &row_ind[i], &col_ind[i], &val[i] );
160     row_ind[i]--;
161     col_ind[i]--;
162     }
163     fclose( fileHandle_p );
164    
165     /* sort the entries */
166     q_sort( row_ind, col_ind, val, 0, nz );
167    
168     /* setup row_ptr */
169     curr_row = 0;
170     for( i=0; (i<nz && curr_row<M); curr_row++ )
171     {
172     while( row_ind[i] != curr_row )
173     i++;
174     row_ptr[curr_row] = i;
175     }
176     row_ptr[M] = nz;
177    
178     /* create F_SMP and F_SM */
179 gross 415 loc_pattern = Paso_SystemMatrixPattern_alloc(PATTERN_FORMAT_DEFAULT, M, row_ptr, col_ind );
180 jgs 150 if(! Paso_noError() )
181     return NULL;
182    
183 gross 415 out = Paso_SystemMatrix_alloc(MATRIX_FORMAT_DEFAULT, loc_pattern, 1, 1 );
184 jgs 150 if(! Paso_noError() )
185     return NULL;
186    
187     /* copy values and cleanup temps */
188     for( i=0; i<nz; i++ )
189     out->val[i] = val[i];
190    
191     MEMFREE( val );
192     MEMFREE( row_ind );
193    
194     return out;
195     }
196    
197     Paso_SystemMatrix* Paso_SystemMatrix_loadMM_toCSC( char *fileName_p )
198     {
199     int i;
200     // int curr_row;
201     int curr_col;
202     MM_typecode matrixCode;
203    
204     index_t *col_ind = NULL;
205     index_t *row_ind = NULL;
206     // index_t *row_ptr = NULL;
207     index_t *col_ptr = NULL;
208     double *val = NULL;
209    
210     Paso_SystemMatrixPattern *loc_pattern = NULL;
211     Paso_SystemMatrix *out = NULL;
212    
213     Paso_resetError();
214    
215     /* open the file */
216     FILE *fileHandle_p = fopen( fileName_p, "r" );
217     if( fileHandle_p == NULL )
218     {
219 gross 415 Paso_setError(IO_ERROR,"Paso_SystemMatrix_loadMM_toCSC: File could not be opened for reading");
220 jgs 150 return NULL;
221     }
222    
223     /* process banner */
224     if( mm_read_banner(fileHandle_p, &matrixCode) != 0 )
225     {
226 gross 415 Paso_setError(IO_ERROR,"Paso_SystemMatrix_loadMM_toCSC: Error processing MM banner");
227 jgs 150 fclose( fileHandle_p );
228     return NULL;
229     }
230     if( !(mm_is_real(matrixCode) && mm_is_sparse(matrixCode) && mm_is_general(matrixCode)) )
231     {
232 gross 415 Paso_setError(TYPE_ERROR,"Paso_SystemMatrix_loadMM_toCSC: found Matrix Market type is not supported.");
233 jgs 150 fclose( fileHandle_p );
234     return NULL;
235     }
236    
237     /* get matrix size */
238     if( mm_read_mtx_crd_size(fileHandle_p, &M, &N, &nz) != 0 )
239     {
240 gross 415 Paso_setError(TYPE_ERROR,"Paso_SystemMatrix_loadMM_toCSC: found Matrix Market type is not supported.");
241 jgs 150 fclose( fileHandle_p );
242     return NULL;
243     }
244    
245     /* prepare storage */
246     col_ind = MEMALLOC( nz, index_t );
247     row_ind = MEMALLOC( nz, index_t );
248     val = MEMALLOC( nz, double );
249    
250     // row_ptr = MEMALLOC( (M+1), index_t );
251     col_ptr = MEMALLOC( (N+1), index_t );
252    
253    
254     // if( col_ind == NULL || row_ind == NULL || val == NULL || row_ptr == NULL )
255     if( col_ind == NULL || row_ind == NULL || val == NULL || col_ptr == NULL )
256     {
257     Paso_setError(MEMORY_ERROR,"Could not allocate memory" );
258     fclose( fileHandle_p );
259     return NULL;
260     }
261    
262     /* perform actual read of elements */
263     for( i=0; i<nz; i++ )
264     {
265     fscanf( fileHandle_p, "%d %d %le\n", &row_ind[i], &col_ind[i], &val[i] );
266     row_ind[i]--;
267     col_ind[i]--;
268     }
269     fclose( fileHandle_p );
270    
271     /* sort the entries */
272     // q_sort( row_ind, col_ind, val, 0, nz );
273     q_sort( col_ind, row_ind, val, 0, nz );
274    
275     /* setup row_ptr */
276     // curr_row = 0;
277     curr_col = 0;
278     // for( i=0; (i<nz && curr_row<M); curr_row++ )
279     for( i=0; (i<nz && curr_col<N); curr_col++ )
280     {
281     // while( row_ind[i] != curr_row )
282     while( col_ind[i] != curr_col )
283     i++;
284     // row_ptr[curr_row] = i;
285     col_ptr[curr_col] = i;
286     }
287     // row_ptr[M] = nz;
288     col_ptr[N] = nz;
289    
290     /* create F_SMP and F_SM */
291 gross 415 // loc_pattern = Paso_SystemMatrixPattern_alloc(PATTERN_FORMAT_DEFAULT, M, row_ptr, col_ind );
292     loc_pattern = Paso_SystemMatrixPattern_alloc(PATTERN_FORMAT_DEFAULT, N, col_ptr, row_ind );
293 jgs 150 if(! Paso_noError() )
294     return NULL;
295    
296 gross 415 // out = Paso_SystemMatrix_alloc( MATRIX_FORMAT_DEFAULT, loc_pattern, 1, 1 );
297     out = Paso_SystemMatrix_alloc( MATRIX_FORMAT_CSC, loc_pattern, 1, 1 );
298 jgs 150 if(! Paso_noError() )
299     return NULL;
300    
301     /* copy values and cleanup temps */
302     for( i=0; i<nz; i++ )
303     out->val[i] = val[i];
304    
305     MEMFREE( val );
306     // MEMFREE( row_ind );
307     MEMFREE( col_ind );
308    
309     return out;
310     }
311    
312    
313     /*
314     * $Log$
315     * Revision 1.2 2005/09/15 03:44:39 jgs
316     * Merge of development branch dev-02 back to main trunk on 2005-09-15
317     *
318     * Revision 1.1.2.1 2005/09/05 06:29:48 gross
319     * These files have been extracted from finley to define a stand alone libray for iterative
320     * linear solvers on the ALTIX. main entry through Paso_solve. this version compiles but
321     * has not been tested yet.
322     *
323     *
324     */

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