1*ec8511deSBarry Smith /* $Id: aij.h,v 1.11 1995/08/17 01:31:13 curfman Exp bsmith $ */ 2b8a66259SBarry Smith 3b8a66259SBarry Smith #include "matimpl.h" 40068c123SLois Curfman McInnes #include <math.h> 5b8a66259SBarry Smith 62d40f771SBarry Smith #if !defined(__AIJ_H) 72d40f771SBarry Smith #define __AIJ_H 82d40f771SBarry Smith 92d40f771SBarry Smith /* 10*ec8511deSBarry Smith MATSEQAIJ format - Compressed row storage (also called Yale sparse matrix 11d35516d3SLois Curfman McInnes format), compatible with Fortran. The i[] and j[] arrays start at 1, 12d35516d3SLois Curfman McInnes not zero, to support Fortran 77. For example, in Fortran 13d35516d3SLois Curfman McInnes j[i[k]+p-1] is the pth column in row k. 142d40f771SBarry Smith */ 15d35516d3SLois Curfman McInnes 16b8a66259SBarry Smith typedef struct { 17d35516d3SLois Curfman McInnes int sorted; /* if true, rows are sorted by increasing columns */ 18d35516d3SLois Curfman McInnes int roworiented; /* if true, row-oriented storage */ 19d35516d3SLois Curfman McInnes int nonew; /* if true, don't allow new elements to be added */ 20d35516d3SLois Curfman McInnes int singlemalloc; /* if true a, i, and j have been obtained with 21d35516d3SLois Curfman McInnes one big malloc */ 22d35516d3SLois Curfman McInnes int assembled; /* if true, matrix is fully assembled */ 231a1c3055SLois Curfman McInnes int m, n; /* rows, columns */ 2480b4ade8SLois Curfman McInnes int nz, maxnz; /* nonzeros, allocated nonzeros */ 25d35516d3SLois Curfman McInnes int *diag; /* pointers to diagonal elements */ 26d35516d3SLois Curfman McInnes int *i; /* pointer to beginning of each row */ 27d35516d3SLois Curfman McInnes int *imax; /* maximum space allocated for each row */ 28d35516d3SLois Curfman McInnes int *ilen; /* actual length of each row */ 29d35516d3SLois Curfman McInnes int *j; /* column values: j + i[k] - 1 is start of row k */ 30d35516d3SLois Curfman McInnes Scalar *a; /* nonzero elements */ 31d35516d3SLois Curfman McInnes IS row, col; /* index sets, used for reorderings */ 324e10411dSBarry Smith Scalar *solve_work; /* work space used in MatSolve_AIJ */ 33*ec8511deSBarry Smith } Mat_SeqAIJ; 34b8a66259SBarry Smith 352d40f771SBarry Smith #endif 36