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| <h4 class="subsection">2.18.2 Looking up or entering a string</h4> |
| <a name="index-bfd_005fhash_005flookup"></a> |
| <p>The function <code>bfd_hash_lookup</code> is used both to look up a |
| string in the hash table and to create a new entry. |
| </p> |
| <p>If the <var>create</var> argument is <code>FALSE</code>, <code>bfd_hash_lookup</code> |
| will look up a string. If the string is found, it will |
| returns a pointer to a <code>struct bfd_hash_entry</code>. If the |
| string is not found in the table <code>bfd_hash_lookup</code> will |
| return <code>NULL</code>. You should not modify any of the fields in |
| the returns <code>struct bfd_hash_entry</code>. |
| </p> |
| <p>If the <var>create</var> argument is <code>TRUE</code>, the string will be |
| entered into the hash table if it is not already there. |
| Either way a pointer to a <code>struct bfd_hash_entry</code> will be |
| returned, either to the existing structure or to a newly |
| created one. In this case, a <code>NULL</code> return means that an |
| error occurred. |
| </p> |
| <p>If the <var>create</var> argument is <code>TRUE</code>, and a new entry is |
| created, the <var>copy</var> argument is used to decide whether to |
| copy the string onto the hash table objalloc or not. If |
| <var>copy</var> is passed as <code>FALSE</code>, you must be careful not to |
| deallocate or modify the string as long as the hash table |
| exists. |
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