diff options
Diffstat (limited to 'src/H5HFpkg.h')
| -rw-r--r-- | src/H5HFpkg.h | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/src/H5HFpkg.h b/src/H5HFpkg.h index 6f3025d..b3b0951 100644 --- a/src/H5HFpkg.h +++ b/src/H5HFpkg.h @@ -114,16 +114,37 @@ #define H5HF_SIZEOF_OFFSET_BITS(b) (((b) + 7) / 8) #define H5HF_SIZEOF_OFFSET_LEN(l) H5HF_SIZEOF_OFFSET_BITS(H5V_log2_of2((unsigned)(l))) -/* Encode a heap ID */ -#define H5HF_ID_ENCODE(i, h, o, l) \ +/* Heap ID bit flags */ +/* Heap ID version (2 bits: 6-7) */ +#define H5HF_ID_VERS_CURR 0x00 /* Current version of ID format */ +#define H5HF_ID_VERS_MASK 0xC0 /* Mask for getting the ID version from flags */ +/* Heap ID type (2 bits: 4-5) */ +#define H5HF_ID_TYPE_MAN 0x00 /* "Managed" object - stored in fractal heap blocks */ +#define H5HF_ID_TYPE_HUGE 0x10 /* "Huge" object - stored in file directly */ +#define H5HF_ID_TYPE_TINY 0x20 /* "Tiny" object - stored in heap ID directly */ +#define H5HF_ID_TYPE_RESERVED 0x30 /* "?" object - reserved for future use */ +#define H5HF_ID_TYPE_MASK 0x30 /* Mask for getting the ID type from flags */ +/* Heap ID bits 0-3 reserved for future use */ + +/* Encode a "managed" heap ID */ +#define H5HF_MAN_ID_ENCODE(i, h, o, l) \ + *(uint8_t *)i++ = H5HF_ID_VERS_CURR | H5HF_ID_TYPE_MAN; \ UINT64ENCODE_VAR((i), (o), (h)->heap_off_size); \ UINT64ENCODE_VAR((i), (l), (h)->heap_len_size) -/* Decode a heap ID */ -#define H5HF_ID_DECODE(i, h, o, l) \ +/* Decode a "managed" heap ID */ +#define H5HF_MAN_ID_DECODE(i, h, f, o, l) \ + f = *(uint8_t *)i++; \ UINT64DECODE_VAR((i), (o), (h)->heap_off_size); \ UINT64DECODE_VAR((i), (l), (h)->heap_len_size) +/* Size of ID for heap */ +#define H5HF_ID_SIZE(h) ( \ + 1 /* ID flag byte */ \ + + (h)->heap_off_size /* Space for managed object offset */ \ + + (h)->heap_len_size /* Space for managed object length */ \ + ) + /* Free space section types for fractal heap */ /* (values stored in free space data structures in file) */ #define H5HF_FSPACE_SECT_SINGLE 0 /* Section is a range of actual bytes in a direct block */ |