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mdbx++: add cursor::erase() overloads for key and for key-value.

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Resolves https://github.com/erthink/libmdbx/pull/226
This commit is contained in:
Andrea Lanfranchi 2021-07-26 19:28:10 +02:00 committed by Leonid Yuriev
parent 5e7a685ba8
commit 2395564c17
1 changed files with 22 additions and 0 deletions
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22
mdbx.h++
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@ -3626,6 +3626,7 @@ public:
inline value_result try_update_reserve(map_handle map, const slice &key,
size_t value_length);
/// \brief Removes all values for given key.
inline bool erase(map_handle map, const slice &key);
/// \brief Removes the particular multi-value entry of the key.
@ -3864,7 +3865,18 @@ public:
inline slice update_reserve(const slice &key, size_t value_length);
inline value_result try_update_reserve(const slice &key, size_t value_length);
/// \brief Removes single key-value pair or all multi-values at the current
/// cursor position.
inline bool erase(bool whole_multivalue = false);
/// \brief Seeks and removes first value or whole multi-value of the given
/// key.
/// \return `True` if the key is found and a value(s) is removed.
inline bool erase(const slice &key, bool whole_multivalue = true);
/// \brief Seeks and removes the particular multi-value entry of the key.
/// \return `True` if the given key-value pair is found and removed.
inline bool erase(const slice &key, const slice &value);
};
/// \brief Managed cursor.
@ -5740,6 +5752,16 @@ inline bool cursor::erase(bool whole_multivalue) {
}
}
inline bool cursor::erase(const slice &key, bool whole_multivalue) {
bool found = seek(key);
return found ? erase(whole_multivalue) : found;
}
inline bool cursor::erase(const slice &key, const slice &value) {
move_result data = find_multivalue(key, value, false);
return data.done ? erase() : data.done;
}
} // namespace mdbx
//------------------------------------------------------------------------------