diff options
Diffstat (limited to 'src/H5Gstab.c')
| -rw-r--r-- | src/H5Gstab.c | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/src/H5Gstab.c b/src/H5Gstab.c index f79d78b..c2df8e7 100644 --- a/src/H5Gstab.c +++ b/src/H5Gstab.c @@ -982,6 +982,81 @@ done: FUNC_LEAVE_NOAPI(ret_value) } /* end H5G_stab_lookup_by_idx() */ +#ifndef H5_STRICT_FORMAT_CHECKS + +/*------------------------------------------------------------------------- + * Function: H5G_stab_valid + * + * Purpose: Verify that a group's symbol table message is valid. If + * provided, the addresses in alt_stab will be tried if the + * addresses in the group's stab message are invalid, and + * the stab message will be updated if necessary. + * + * Return: Non-negative on success/Negative on failure + * + * Programmer: Neil Fortner + * nfortne2@hdfgroup.org + * Mar 17, 2009 + * + *------------------------------------------------------------------------- + */ +herr_t +H5G_stab_valid(H5O_loc_t *grp_oloc, hid_t dxpl_id, H5O_stab_t *alt_stab) +{ + H5O_stab_t stab; /* Current symbol table */ + H5HL_t *heap = NULL; /* Pointer to local heap */ + hbool_t changed = FALSE; /* Whether stab has been modified */ + herr_t ret_value = SUCCEED; /* Return value */ + + FUNC_ENTER_NOAPI(H5G_stab_valid, FAIL) + + /* Read the symbol table message */ + H5O_msg_read(grp_oloc, H5O_STAB_ID, &stab, dxpl_id); + + /* Check if the symbol table message's b-tree address is valid */ + if(H5B_valid(grp_oloc->file, dxpl_id, H5B_SNODE, stab.btree_addr) < 0) { + /* Address is invalid, try the b-tree address in the alternate symbol + * table message */ + if(!alt_stab || H5B_valid(grp_oloc->file, dxpl_id, H5B_SNODE, alt_stab->btree_addr) < 0) + HGOTO_ERROR(H5E_BTREE, H5E_NOTFOUND, FAIL, "unable to locate b-tree") + else { + /* The alternate symbol table's b-tree address is valid. Adjust the + * symbol table message in the group. */ + stab.btree_addr = alt_stab->btree_addr; + changed = TRUE; + } /* end else */ + } /* end if */ + + /* Check if the symbol table message's heap address is valid */ + if(NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, stab.heap_addr, H5AC_READ))) { + /* Address is invalid, try the heap address in the alternate symbol + * table message */ + if(!alt_stab || NULL == (heap = H5HL_protect(grp_oloc->file, dxpl_id, alt_stab->heap_addr, H5AC_READ))) + HGOTO_ERROR(H5E_HEAP, H5E_NOTFOUND, FAIL, "unable to locate heap") + else { + /* The alternate symbol table's heap address is valid. Adjust the + * symbol table message in the group. */ + stab.heap_addr = alt_stab->heap_addr; + changed = TRUE; + } /* end else */ + } /* end if */ + + /* Update the symbol table message and clear errors if necessary */ + if(changed) { + H5E_clear_stack(NULL); + if(H5O_msg_write(grp_oloc, H5O_STAB_ID, 0, H5O_UPDATE_TIME | H5O_UPDATE_FORCE, &stab, dxpl_id) < 0) + HGOTO_ERROR(H5E_SYM, H5E_CANTINIT, FAIL, "unable to correct symbol table message") + } /* end if */ + +done: + /* Release resources */ + if(heap && H5HL_unprotect(grp_oloc->file, dxpl_id, heap, stab.heap_addr) < 0) + HDONE_ERROR(H5E_SYM, H5E_PROTECT, FAIL, "unable to unprotect symbol table heap") + + FUNC_LEAVE_NOAPI(ret_value) +} /* end H5G_stab_valid */ +#endif /* H5_STRICT_FORMAT_CHECKS */ + #ifndef H5_NO_DEPRECATED_SYMBOLS /*------------------------------------------------------------------------- |