| 35 | /*************** SpgmrMalloc *****************************************/ |
| 36 | |
| 37 | SpgmrMem SpgmrMalloc(integer N, int l_max, void *machEnv) |
| 38 | { |
| 39 | SpgmrMem mem; |
| 40 | N_Vector *V, xcor, vtemp; |
| 41 | real **Hes, *givens, *yg; |
| 42 | int k, i; |
| 43 | |
| 44 | /* Check the input parameters */ |
| 45 | |
| 46 | if ((N <= 0) || (l_max <= 0)) return(NULL); |
| 47 | |
| 48 | /* Get memory for the Krylov basis vectors V[0], ..., V[l_max] */ |
| 49 | |
| 50 | V = (N_Vector *) malloc((l_max+1)*sizeof(N_Vector)); |
| 51 | if (V == NULL) return(NULL); |
| 52 | |
| 53 | for (k=0; k <= l_max; k++) { |
| 54 | V[k] = N_VNew(N, (machEnvType)machEnv); |
| 55 | if (V[k] == NULL) { |
| 56 | FreeVectorArray(V, k-1); |
| 57 | return(NULL); |
| 58 | } |
| 59 | } |
| 60 | |
| 61 | /* Get memory for the Hessenberg matrix Hes */ |
| 62 | |
| 63 | Hes = (real **) malloc((l_max+1)*sizeof(real *)); |
| 64 | if (Hes == NULL) { |
| 65 | FreeVectorArray(V, l_max); |
| 66 | return(NULL); |
| 67 | } |
| 68 | |
| 69 | for (k=0; k <= l_max; k++) { |
| 70 | Hes[k] = (real *) malloc(l_max*sizeof(real)); |
| 71 | if (Hes[k] == NULL) { |
| 72 | for (i=0; i < k; i++) free(Hes[i]); |
| 73 | FreeVectorArray(V, l_max); |
| 74 | return(NULL); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /* Get memory for Givens rotation components */ |
| 79 | |
| 80 | givens = (real *) malloc(2*l_max*sizeof(real)); |
| 81 | if (givens == NULL) { |
| 82 | for (i=0; i <= l_max; i++) free(Hes[i]); |
| 83 | FreeVectorArray(V, l_max); |
| 84 | return(NULL); |
| 85 | } |
| 86 | |
| 87 | /* Get memory to hold the correction to z_tilde */ |
| 88 | |
| 89 | xcor = N_VNew(N, (machEnvType)machEnv); |
| 90 | if (xcor == NULL) { |
| 91 | free(givens); |
| 92 | for (i=0; i <= l_max; i++) free(Hes[i]); |
| 93 | FreeVectorArray(V, l_max); |
| 94 | return(NULL); |
no test coverage detected