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[C#] Rework how sorted vectors are looked up (#7441)

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This commit is contained in:
Derek Bailey
2022-08-15 09:33:07 -07:00
committed by GitHub
parent 44a7dc9995
commit 214125e417
5 changed files with 104 additions and 68 deletions
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11
tests/MyGame/Example/Monster.cs
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@@ -478,18 +478,21 @@ public struct Monster : IFlatbufferObject
public static void FinishSizePrefixedMonsterBuffer(FlatBufferBuilder builder, Offset<MyGame.Example.Monster> offset) { builder.FinishSizePrefixed(offset.Value, "MONS"); }
public static VectorOffset CreateSortedVectorOfMonster(FlatBufferBuilder builder, Offset<Monster>[] offsets) {
Array.Sort(offsets, (Offset<Monster> o1, Offset<Monster> o2) => Table.CompareStrings(Table.__offset(10, o1.Value, builder.DataBuffer), Table.__offset(10, o2.Value, builder.DataBuffer), builder.DataBuffer));
Array.Sort(offsets,
(Offset<Monster> o1, Offset<Monster> o2) =>
new Monster().__assign(builder.DataBuffer.Length - o1.Value, builder.DataBuffer).Name.CompareTo(new Monster().__assign(builder.DataBuffer.Length - o2.Value, builder.DataBuffer).Name));
return builder.CreateVectorOfTables(offsets);
}
public static Monster? __lookup_by_key(int vectorLocation, string key, ByteBuffer bb) {
byte[] byteKey = System.Text.Encoding.UTF8.GetBytes(key);
Monster obj_ = new Monster();
int span = bb.GetInt(vectorLocation - 4);
int start = 0;
while (span != 0) {
int middle = span / 2;
int tableOffset = Table.__indirect(vectorLocation + 4 * (start + middle), bb);
int comp = Table.CompareStrings(Table.__offset(10, bb.Length - tableOffset, bb), byteKey, bb);
obj_.__assign(tableOffset, bb);
int comp = obj_.Name.CompareTo(key);
if (comp > 0) {
span = middle;
} else if (comp < 0) {
@@ -497,7 +500,7 @@ public struct Monster : IFlatbufferObject
start += middle;
span -= middle;
} else {
return new Monster().__assign(tableOffset, bb);
return obj_;
}
}
return null;