--- /dev/null
+/*************************************************************************
+ *
+ * Copyright 2016 Realm Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ **************************************************************************/
+
+#ifndef REALM_ARRAY_STRING_LONG_HPP
+#define REALM_ARRAY_STRING_LONG_HPP
+
+#include <realm/array_blob.hpp>
+#include <realm/array_integer.hpp>
+
+namespace realm {
+
+
+class ArrayStringLong : public Array {
+public:
+ typedef StringData value_type;
+
+ explicit ArrayStringLong(Allocator&, bool nullable) noexcept;
+ ~ArrayStringLong() noexcept override
+ {
+ }
+
+ // Disable copying, this is not allowed.
+ ArrayStringLong& operator=(const ArrayStringLong&) = delete;
+ ArrayStringLong(const ArrayStringLong&) = delete;
+
+ /// Create a new empty long string array and attach this accessor to
+ /// it. This does not modify the parent reference information of
+ /// this accessor.
+ ///
+ /// Note that the caller assumes ownership of the allocated
+ /// underlying node. It is not owned by the accessor.
+ void create();
+
+ //@{
+ /// Overriding functions of Array
+ void init_from_ref(ref_type) noexcept;
+ void init_from_mem(MemRef) noexcept;
+ void init_from_parent() noexcept;
+ //@}
+
+ bool is_empty() const noexcept;
+ size_t size() const noexcept;
+
+ StringData get(size_t ndx) const noexcept;
+
+
+ void add(StringData value);
+ void set(size_t ndx, StringData value);
+ void insert(size_t ndx, StringData value);
+ void erase(size_t ndx);
+ void truncate(size_t size);
+ void clear();
+ void destroy();
+
+ bool is_null(size_t ndx) const;
+ void set_null(size_t ndx);
+
+ size_t count(StringData value, size_t begin = 0, size_t end = npos) const noexcept;
+ size_t find_first(StringData value, size_t begin = 0, size_t end = npos) const noexcept;
+ void find_all(IntegerColumn& result, StringData value, size_t add_offset = 0, size_t begin = 0,
+ size_t end = npos) const;
+
+ /// Get the specified element without the cost of constructing an
+ /// array instance. If an array instance is already available, or
+ /// you need to get multiple values, then this method will be
+ /// slower.
+ static StringData get(const char* header, size_t ndx, Allocator&, bool nullable) noexcept;
+
+ ref_type bptree_leaf_insert(size_t ndx, StringData, TreeInsertBase&);
+
+ static size_t get_size_from_header(const char*, Allocator&) noexcept;
+
+ /// Construct a long string array of the specified size and return
+ /// just the reference to the underlying memory. All elements will
+ /// be initialized to zero size blobs.
+ static MemRef create_array(size_t size, Allocator&, bool nullable);
+
+ /// Construct a copy of the specified slice of this long string
+ /// array using the specified target allocator.
+ MemRef slice(size_t offset, size_t slice_size, Allocator& target_alloc) const;
+
+#ifdef REALM_DEBUG
+ void to_dot(std::ostream&, StringData title = StringData()) const;
+#endif
+
+ bool update_from_parent(size_t old_baseline) noexcept;
+
+private:
+ ArrayInteger m_offsets;
+ ArrayBlob m_blob;
+ Array m_nulls;
+ bool m_nullable;
+};
+
+
+// Implementation:
+inline ArrayStringLong::ArrayStringLong(Allocator& allocator, bool nullable) noexcept
+ : Array(allocator)
+ , m_offsets(allocator)
+ , m_blob(allocator)
+ , m_nulls(nullable ? allocator : Allocator::get_default())
+ , m_nullable(nullable)
+{
+ m_offsets.set_parent(this, 0);
+ m_blob.set_parent(this, 1);
+ if (nullable)
+ m_nulls.set_parent(this, 2);
+}
+
+inline void ArrayStringLong::create()
+{
+ size_t init_size = 0;
+ MemRef mem = create_array(init_size, get_alloc(), m_nullable); // Throws
+ init_from_mem(mem);
+}
+
+inline void ArrayStringLong::init_from_ref(ref_type ref) noexcept
+{
+ REALM_ASSERT(ref);
+ char* header = get_alloc().translate(ref);
+ init_from_mem(MemRef(header, ref, m_alloc));
+ m_nullable = (Array::size() == 3);
+}
+
+inline void ArrayStringLong::init_from_parent() noexcept
+{
+ ref_type ref = get_ref_from_parent();
+ init_from_ref(ref);
+}
+
+inline bool ArrayStringLong::is_empty() const noexcept
+{
+ return m_offsets.is_empty();
+}
+
+inline size_t ArrayStringLong::size() const noexcept
+{
+ return m_offsets.size();
+}
+
+inline StringData ArrayStringLong::get(size_t ndx) const noexcept
+{
+ REALM_ASSERT_3(ndx, <, m_offsets.size());
+
+ if (m_nullable && m_nulls.get(ndx) == 0)
+ return realm::null();
+
+ size_t begin, end;
+ if (0 < ndx) {
+ begin = to_size_t(m_offsets.get(ndx - 1));
+ end = to_size_t(m_offsets.get(ndx));
+ }
+ else {
+ begin = 0;
+ end = to_size_t(m_offsets.get(0));
+ }
+ --end; // Discount the terminating zero
+
+ return StringData(m_blob.get(begin), end - begin);
+}
+
+inline void ArrayStringLong::truncate(size_t new_size)
+{
+ REALM_ASSERT_3(new_size, <, m_offsets.size());
+
+ size_t blob_size = new_size ? to_size_t(m_offsets.get(new_size - 1)) : 0;
+
+ m_offsets.truncate(new_size);
+ m_blob.truncate(blob_size);
+ if (m_nullable)
+ m_nulls.truncate(new_size);
+}
+
+inline void ArrayStringLong::clear()
+{
+ m_blob.clear();
+ m_offsets.clear();
+ if (m_nullable)
+ m_nulls.clear();
+}
+
+inline void ArrayStringLong::destroy()
+{
+ m_blob.destroy();
+ m_offsets.destroy();
+ if (m_nullable)
+ m_nulls.destroy();
+ Array::destroy();
+}
+
+inline bool ArrayStringLong::update_from_parent(size_t old_baseline) noexcept
+{
+ bool res = Array::update_from_parent(old_baseline);
+ if (res) {
+ m_blob.update_from_parent(old_baseline);
+ m_offsets.update_from_parent(old_baseline);
+ if (m_nullable)
+ m_nulls.update_from_parent(old_baseline);
+ }
+ return res;
+}
+
+inline size_t ArrayStringLong::get_size_from_header(const char* header, Allocator& alloc) noexcept
+{
+ ref_type offsets_ref = to_ref(Array::get(header, 0));
+ const char* offsets_header = alloc.translate(offsets_ref);
+ return Array::get_size_from_header(offsets_header);
+}
+
+
+} // namespace realm
+
+#endif // REALM_ARRAY_STRING_LONG_HPP
fnp / wl-app.git / blobdiff