diff options
Diffstat (limited to 'src/H5Fsuper.c')
| -rw-r--r-- | src/H5Fsuper.c | 62 |
1 files changed, 32 insertions, 30 deletions
diff --git a/src/H5Fsuper.c b/src/H5Fsuper.c index 8205392..a1c67ec 100644 --- a/src/H5Fsuper.c +++ b/src/H5Fsuper.c @@ -100,34 +100,33 @@ H5F_init_super_interface(void) /*------------------------------------------------------------------------- - * Function: H5F_locate_signature + * Function: H5F_locate_signature * - * Purpose: Finds the HDF5 superblock signature in a file. The signature - * can appear at address 0, or any power of two beginning with - * 512. + * Purpose: Finds the HDF5 superblock signature in a file. The + * signature can appear at address 0, or any power of two + * beginning with 512. * - * Return: Success: The absolute format address of the signature. - * - * Failure: HADDR_UNDEF + * Return: Success: SUCCEED + * Failure: FAIL * - * Programmer: Robb Matzke - * Friday, November 7, 1997 + * Programmer: Robb Matzke + * Friday, November 7, 1997 * *------------------------------------------------------------------------- */ -haddr_t -H5F_locate_signature(H5FD_t *file, hid_t dxpl_id) +herr_t +H5F_locate_signature(H5FD_t *file, hid_t dxpl_id, haddr_t *sig_addr) { - haddr_t addr, eoa; - uint8_t buf[H5F_SIGNATURE_LEN]; - unsigned n, maxpow; - haddr_t ret_value; /* Return value */ + haddr_t addr, eoa; + uint8_t buf[H5F_SIGNATURE_LEN]; + unsigned n, maxpow; + herr_t ret_value = SUCCEED; /* Return value */ FUNC_ENTER_NOAPI_NOINIT /* Find the least N such that 2^N is larger than the file size */ if(HADDR_UNDEF == (addr = H5FD_get_eof(file)) || HADDR_UNDEF == (eoa = H5FD_get_eoa(file, H5FD_MEM_SUPER))) - HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to obtain EOF/EOA value") + HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to obtain EOF/EOA value") for(maxpow = 0; addr; maxpow++) addr >>= 1; maxpow = MAX(maxpow, 9); @@ -137,26 +136,27 @@ H5F_locate_signature(H5FD_t *file, hid_t dxpl_id) * powers of two larger than 9. */ for(n = 8; n < maxpow; n++) { - addr = (8 == n) ? 0 : (haddr_t)1 << n; - if(H5FD_set_eoa(file, H5FD_MEM_SUPER, addr + H5F_SIGNATURE_LEN) < 0) - HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to set EOA value for file signature") - if(H5FD_read(file, dxpl_id, H5FD_MEM_SUPER, addr, (size_t)H5F_SIGNATURE_LEN, buf) < 0) - HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to read file signature") - if(!HDmemcmp(buf, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN)) + addr = (8 == n) ? 0 : (haddr_t)1 << n; + if(H5FD_set_eoa(file, H5FD_MEM_SUPER, addr + H5F_SIGNATURE_LEN) < 0) + HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to set EOA value for file signature") + if(H5FD_read(file, dxpl_id, H5FD_MEM_SUPER, addr, (size_t)H5F_SIGNATURE_LEN, buf) < 0) + HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to read file signature") + if(!HDmemcmp(buf, H5F_SIGNATURE, (size_t)H5F_SIGNATURE_LEN)) break; } /* end for */ /* * If the signature was not found then reset the EOA value and return - * failure. + * HADDR_UNDEF. */ if(n >= maxpow) { - (void)H5FD_set_eoa(file, H5FD_MEM_SUPER, eoa); /* Ignore return value */ - HGOTO_ERROR(H5E_IO, H5E_CANTINIT, HADDR_UNDEF, "unable to find a valid file signature") + if(H5FD_set_eoa(file, H5FD_MEM_SUPER, eoa) < 0) + HGOTO_ERROR(H5E_IO, H5E_CANTINIT, FAIL, "unable to reset EOA value") + *sig_addr = HADDR_UNDEF; } /* end if */ - - /* Set return value */ - ret_value = addr; + else + /* Set return value */ + *sig_addr = addr; done: FUNC_LEAVE_NOAPI(ret_value) @@ -330,8 +330,10 @@ H5F_super_read(H5F_t *f, hid_t dxpl_id) FUNC_ENTER_NOAPI_TAG(dxpl_id, H5AC__SUPERBLOCK_TAG, FAIL) /* Find the superblock */ - if(HADDR_UNDEF == (super_addr = H5F_locate_signature(f->shared->lf, dxpl_id))) - HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to find file signature") + if(H5F_locate_signature(f->shared->lf, dxpl_id, &super_addr) < 0) + HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "unable to locate file signature") + if(HADDR_UNDEF == super_addr) + HGOTO_ERROR(H5E_FILE, H5E_NOTHDF5, FAIL, "file signature not found") /* Check for userblock present */ if(H5F_addr_gt(super_addr, 0)) { |