44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
/**
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* Copyright 2014 (c) Anna Schumaker.
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*/
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#ifndef OCARINA_CORE_INDEX_H
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#define OCARINA_CORE_INDEX_H
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extern "C" {
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#include <core/database.h>
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#include <core/set.h>
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}
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#include <string>
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/**
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* The index_entry struct is used to associate a specific key with a set of
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* integer identifiers. This lets us use a Database as an inverted index.
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*/
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struct index_entry {
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gchar *ie_key;
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struct set ie_set;
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struct db_entry ie_dbe;
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};
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#define INDEX_ENTRY(dbe) ((struct index_entry *)DBE_DATA(dbe))
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/* Initialize a database for use as an index. */
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void index_init(struct database *, const gchar *, bool);
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/* Add a value to an index item with the specified key. */
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index_entry *index_insert(struct database *, const gchar *, unsigned int);
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/* Remove a value from an index item with the specified key. */
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void index_remove(struct database *, const gchar *, unsigned int);
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/* Called to check if the index has the specified (key, value) pair. */
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bool index_has(struct database *, const gchar *, unsigned int);
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#ifdef CONFIG_TESTING
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const struct db_ops *test_index_ops();
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#endif /* CONFIG_TESTING */
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#endif /* OCARINA_CORE_DATABASE_H */
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