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| <h4 class="subsubsection">2.18.4.3 Write other derived routines</h4> |
| <p>You will want to write other routines for your new hash table, |
| as well. |
| </p> |
| <p>You will want an initialization routine which calls the |
| initialization routine of the hash table you are deriving from |
| and initializes any other local fields. For the linker hash |
| table, this is <code>_bfd_link_hash_table_init</code> in <code>linker.c</code>. |
| </p> |
| <p>You will want a lookup routine which calls the lookup routine |
| of the hash table you are deriving from and casts the result. |
| The linker hash table uses <code>bfd_link_hash_lookup</code> in |
| <code>linker.c</code> (this actually takes an additional argument which |
| it uses to decide how to return the looked up value). |
| </p> |
| <p>You may want a traversal routine. This should just call the |
| traversal routine of the hash table you are deriving from with |
| appropriate casts. The linker hash table uses |
| <code>bfd_link_hash_traverse</code> in <code>linker.c</code>. |
| </p> |
| <p>These routines may simply be defined as macros. For example, |
| the a.out backend linker hash table, which is derived from the |
| linker hash table, uses macros for the lookup and traversal |
| routines. These are <code>aout_link_hash_lookup</code> and |
| <code>aout_link_hash_traverse</code> in aoutx.h. |
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