/* * Matrix Market I/O library for ANSI C * * See http://math.nist.gov/MatrixMarket for details. * * */ /* avoid Windows warnings (for example: strcpy, fscanf, etc.) */ #if defined(_WIN32) #define _CRT_SECURE_NO_WARNINGS #endif #include #include #include #include #include "mmio.h" int mm_read_unsymmetric_sparse(const char *fname, int *M_, int *N_, int *nz_, double **val_, int **I_, int **J_) { FILE *f; MM_typecode matcode; int M, N, nz; int i; double *val; int *I, *J; if ((f = fopen(fname, "r")) == NULL) return -1; if (mm_read_banner(f, &matcode) != 0) { printf("mm_read_unsymetric: Could not process Matrix Market banner "); printf(" in file [%s]\n", fname); return -1; } if ( !(mm_is_real(matcode) && mm_is_matrix(matcode) && mm_is_sparse(matcode))) { fprintf(stderr, "Sorry, this application does not support "); fprintf(stderr, "Market Market type: [%s]\n", mm_typecode_to_str(matcode)); return -1; } /* find out size of sparse matrix: M, N, nz .... */ if (mm_read_mtx_crd_size(f, &M, &N, &nz) !=0) { fprintf(stderr, "read_unsymmetric_sparse(): could not parse matrix size.\n"); return -1; } *M_ = M; *N_ = N; *nz_ = nz; /* reseve memory for matrices */ I = (int *) malloc(nz * sizeof(int)); J = (int *) malloc(nz * sizeof(int)); val = (double *) malloc(nz * sizeof(double)); *val_ = val; *I_ = I; *J_ = J; /* NOTE: when reading in doubles, ANSI C requires the use of the "l" */ /* specifier as in "%lg", "%lf", "%le", otherwise errors will occur */ /* (ANSI C X3.159-1989, Sec. 4.9.6.2, p. 136 lines 13-15) */ for (i=0; i