diff options
Diffstat (limited to 'src/H5VMprivate.h')
| -rw-r--r-- | src/H5VMprivate.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/H5VMprivate.h b/src/H5VMprivate.h index 7d3361b..f402b36 100644 --- a/src/H5VMprivate.h +++ b/src/H5VMprivate.h @@ -49,6 +49,22 @@ typedef herr_t (*H5VM_opvv_func_t)(hsize_t dst_off, hsize_t src_off, #define H5VM_vector_zero(N,DST) HDmemset(DST,0,(N)*sizeof(*(DST))) +/* Given a coordinate offset array (COORDS) of type TYPE, move the unlimited + * dimension (UNLIM_DIM) value to offset 0, sliding any intermediate values down + * one position. */ +#define H5VM_swizzle_coords(TYPE,COORDS,UNLIM_DIM) { \ + /* COORDS must be an array of type TYPE */ \ + HDassert(sizeof(COORDS[0]) == sizeof(TYPE)); \ + \ + /* Nothing to do when unlimited dimension is at position 0 */ \ + if(0 != (UNLIM_DIM)) { \ + TYPE _tmp = (COORDS)[UNLIM_DIM]; \ + \ + HDmemmove(&(COORDS)[1], &(COORDS)[0], sizeof(TYPE) * (UNLIM_DIM)); \ + (COORDS)[0] = _tmp; \ + } /* end if */ \ +} + /* A null pointer is equivalent to a zero vector */ #define H5VM_ZERO NULL |