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65 lines
1.9 KiB
C++
65 lines
1.9 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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// A class for performing full text searches on dives.
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// Search is case-insensitive. Even though QString has many design
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// issues such as COW semantics and UTF-16 encoding, it provides
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// platform independence and reasonable performance. Therefore,
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// this is based in QString instead of std::string.
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//
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// To make this accessible from C, this does manual memory management:
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// Every dive is associated with a cache of words. Thus, when deleting
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// a dive, a function freeing that data has to be called.
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#ifndef FULLTEXT_H
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#define FULLTEXT_H
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// 1) The C-accessible interface
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct full_text_cache;
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struct dive;
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void fulltext_register(struct dive *d); // Note: can be called repeatedly
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void fulltext_unregister(struct dive *d); // Note: can be called repeatedly
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void fulltext_unregister_all(); // Unregisters all dives in the dive table
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void fulltext_reload(); // Registers all dives in the dive table
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#ifdef __cplusplus
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}
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#endif
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// 2) The C++-only interface
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#ifdef __cplusplus
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#include <QString>
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#include <vector>
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enum class StringFilterMode {
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SUBSTRING = 0,
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STARTSWITH = 1,
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EXACT = 2
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};
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// A fulltext query. Basically a list of normalized words we search for
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struct FullTextQuery {
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std::vector<QString> words;
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FullTextQuery &operator=(const QString &); // Initialize by assigning a user-provided search string
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bool doit() const; // true if we should to a fulltext search
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};
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// Describes the result of a fulltext search
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struct FullTextResult {
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std::vector<dive *> dives;
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bool dive_matches(const struct dive *d) const;
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};
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// Two search modes:
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// 1) Find all dives matching the query.
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// 2) Test if a given dive matches the query.
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FullTextResult fulltext_find_dives(const FullTextQuery &q, StringFilterMode);
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bool fulltext_dive_matches(const struct dive *d, const FullTextQuery &q, StringFilterMode);
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#endif
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#endif
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