diff options
Diffstat (limited to 'src/H5Odtype.c')
| -rw-r--r-- | src/H5Odtype.c | 51 |
1 files changed, 44 insertions, 7 deletions
diff --git a/src/H5Odtype.c b/src/H5Odtype.c index 60f77d9..fe8c627 100644 --- a/src/H5Odtype.c +++ b/src/H5Odtype.c @@ -115,20 +115,23 @@ const H5O_msg_class_t H5O_MSG_DTYPE[1] = {{ * * Purpose: Decodes a datatype * - * Return: Non-negative on success/Negative on failure + * Return: TRUE if we can upgrade the parent type's version even + * with strict format checks + * FALSE if we cannot + * Negative on failure * * Programmer: Robb Matzke * Monday, December 8, 1997 * *------------------------------------------------------------------------- */ -static herr_t +static htri_t H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **pp, H5T_t *dt) { unsigned flags, version; unsigned i; size_t z; - herr_t ret_value = SUCCEED; /* Return value */ + htri_t ret_value = FALSE; /* Return value */ FUNC_ENTER_NOAPI_NOINIT(H5O_dtype_decode_helper) @@ -254,6 +257,7 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p unsigned offset_nbytes; /* Size needed to encode member offsets */ size_t max_memb_pos = 0; /* Maximum member covered, so far */ unsigned max_version = 0; /* Maximum member version */ + hbool_t upgrade_to = 0; /* Version number we can "soft" upgrade to */ unsigned j; /* Compute the # of bytes required to store a member offset */ @@ -271,6 +275,7 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") for(i = 0; i < dt->shared->u.compnd.nmembs; i++) { unsigned ndims = 0; /* Number of dimensions of the array field */ + htri_t can_upgrade; /* Whether we can upgrade this type's version */ hsize_t dim[H5O_LAYOUT_NDIMS]; /* Dimensions of the array */ H5T_t *array_dt; /* Temporary pointer to the array datatype */ H5T_t *temp_type; /* Temporary pointer to the field's datatype */ @@ -318,16 +323,20 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p HGOTO_ERROR(H5E_RESOURCE, H5E_NOSPACE, FAIL, "memory allocation failed") /* Decode the field's datatype information */ - if(H5O_dtype_decode_helper(f, ioflags, pp, temp_type) < 0) { + if((can_upgrade = H5O_dtype_decode_helper(f, ioflags, pp, temp_type)) < 0) { for(j = 0; j <= i; j++) H5MM_xfree(dt->shared->u.compnd.memb[j].name); H5MM_xfree(dt->shared->u.compnd.memb); HGOTO_ERROR(H5E_DATATYPE, H5E_CANTDECODE, FAIL, "unable to decode member type") } /* end if */ - /* Keep track of the maximum member version found */ - if(temp_type->shared->version > max_version) - max_version = temp_type->shared->version; + /* Upgrade the version if we can and it is necessary */ + if(can_upgrade && temp_type->shared->version > version) { + upgrade_to = temp_type->shared->version; + + /* Pass "can_upgrade" flag down to parent type */ + ret_value = TRUE; + } /* end if */ /* Go create the array datatype now, for older versions of the datatype message */ if(version == H5O_DTYPE_VERSION_1) { @@ -346,9 +355,26 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p /* Make the array type the type that is set for the field */ temp_type = array_dt; + + /* Reset array version if NOCHANGE is specified (i.e. h5debug) */ + if(*ioflags & H5O_DECODEIO_NOCHANGE) + temp_type->shared->version = H5O_DTYPE_VERSION_1; + else { + /* Otherwise upgrade the compound version */ + if(upgrade_to < temp_type->shared->version) + upgrade_to = temp_type->shared->version; + + /* Set the return value to indicate that we should freely + * upgrade parent types */ + ret_value = TRUE; + } /* end else */ } /* end if */ } /* end if */ + /* Keep track of the maximum member version found */ + if(temp_type->shared->version > max_version) + max_version = temp_type->shared->version; + /* * Set the "force conversion" flag if VL datatype fields exist in this * type or any component types @@ -397,6 +423,17 @@ H5O_dtype_decode_helper(H5F_t *f, unsigned *ioflags/*in,out*/, const uint8_t **p dt->shared->u.compnd.packed = FALSE; } /* end if */ } /* end for */ + + /* Upgrade the compound if requested */ + if(version < upgrade_to) { + version = upgrade_to; + if(H5T_upgrade_version(dt, upgrade_to) < 0) + HGOTO_ERROR(H5E_DATATYPE, H5E_CANTSET, FAIL, "can't upgrade compound encoding version") + /* We won't mark the message dirty since there were no + * errors in the file, simply type versions that we will no + * longer encode. */ + } /* end if */ + /* Check that no member of this compound has a version greater * than the compound itself. */ H5O_DTYPE_CHECK_VERSION(dt, version, max_version, ioflags, "compound", FAIL) |