diff options
Diffstat (limited to 'examples/h5dsm_attr_read.c')
-rw-r--r-- | examples/h5dsm_attr_read.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/examples/h5dsm_attr_read.c b/examples/h5dsm_attr_read.c new file mode 100644 index 0000000..8909535 --- /dev/null +++ b/examples/h5dsm_attr_read.c @@ -0,0 +1,106 @@ +#include "h5dsm_example.h" +#include <time.h> + +int main(int argc, char *argv[]) { + uuid_t pool_uuid; + char *pool_grp = NULL; + hid_t file = -1, obj = -1, attr = -1, fapl = -1; + int buf[4][6]; + int i, j; + H5VL_daosm_snap_id_t snap_id; + + (void)MPI_Init(&argc, &argv); + (void)daos_init(); + + /* Seed random number generator */ + srand(time(NULL)); + + if(argc < 6 || argc > 7) + PRINTF_ERROR("argc must be 6 or 7\n"); + + /* Parse UUID */ + if(0 != uuid_parse(argv[1], pool_uuid)) + ERROR; + + /* Set up FAPL */ + if((fapl = H5Pcreate(H5P_FILE_ACCESS)) < 0) + ERROR; + if(H5Pset_fapl_daosm(fapl, MPI_COMM_WORLD, MPI_INFO_NULL, pool_uuid, pool_grp) < 0) + ERROR; + + /* Open snapshot if specified */ + if(argc == 7) { + snap_id = (H5VL_daosm_snap_id_t)atoi(argv[6]); + printf("Opening snapshot %llu\n", (long long unsigned)snap_id); + if(H5Pset_daosm_snap_open(fapl, snap_id) < 0) + ERROR; + } /* end if */ + + /* Open file */ + if((file = H5Fopen(argv[2], H5F_ACC_RDONLY, fapl)) < 0) + ERROR; + + /* Open object */ + if(!strcmp(argv[3], "-d") || !strcmp(argv[3], "-D")) { + if((obj = H5Dopen2(file, argv[4], H5P_DEFAULT)) < 0) + ERROR; + } + else { + if(strcmp(argv[3], "-g") && strcmp(argv[3], "-G")) + PRINTF_ERROR("argv[3] must be -d, -D, -g, or -G\n"); + if((obj = H5Gopen2(file, argv[4], H5P_DEFAULT)) < 0) + ERROR; + } + + /* Open attribute */ + if((attr = H5Aopen(obj, argv[5], H5P_DEFAULT)) < 0) + ERROR; + + printf("Reading attribute\n"); + + /* Initialize buffer */ + for(i = 0; i < 4; i++) + for(j = 0; j < 6; j++) + buf[i][j] = -1; + + /* Read data */ + if(H5Aread(attr, H5T_NATIVE_INT, buf) < 0) + ERROR; + + /* Print buffer */ + printf("Successfully read data. Buffer is:\n"); + for(i = 0; i < 4; i++) { + for(j = 0; j < 6; j++) + printf("%d ", buf[i][j]); + printf("\n"); + } + + /* Close */ + if(H5Aclose(attr) < 0) + ERROR; + if(H5Oclose(obj) < 0) + ERROR; + if(H5Fclose(file) < 0) + ERROR; + if(H5Pclose(fapl) < 0) + ERROR; + + printf("Success\n"); + + (void)daos_fini(); + (void)MPI_Finalize(); + return 0; + +error: + H5E_BEGIN_TRY { + H5Aclose(attr); + H5Oclose(obj); + H5Fclose(file); + H5Pclose(fapl); + } H5E_END_TRY; + + (void)daos_fini(); + (void)MPI_Finalize(); + return 1; +} + |