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flatbuffers
Commit 8fdced4e authored by TGIshib's avatar TGIshib
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parent 9031597f
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Showing with 183 additions and 98 deletions
java/com/google/flatbuffers/FlatBufferBuilder.java
View file @ 8fdced4e
......@@ -375,7 +375,7 @@ public class FlatBufferBuilder {
*/
public int createVectorOfTables(int[] offsets) {
notNested();
startVector(4, offsets.length, 4);
startVector(Constants.SIZEOF_INT, offsets.length, Constants.SIZEOF_INT);
for(int i = offsets.length - 1; i >= 0; i--) addOffset(offsets[i]);
return endVector();
}
......@@ -383,21 +383,13 @@ public class FlatBufferBuilder {
/**
* Create a vector of sorted by the key tables.
*
* @param type Type of the tables.
* @param obj Instance of the table class.
* @param offsets Offsets of the tables.
* @return Returns offset of the sorted vector.
*/
public <T> int createSortedTableVector(Class<T> type, int[] offsets) {
try{
return (int)type.getMethod("createMySortedTableVector", FlatBufferBuilder.class, ByteBuffer.class, int[].class).invoke(null, this, bb, offsets);
} catch (NoSuchMethodException e) {
e.printStackTrace();
} catch (SecurityException e) {
e.printStackTrace();
} catch (Exception e){
e.printStackTrace();
}
return 0;
public <T extends Table> int createSortedTableVector(T obj, int[] offsets) {
obj.sortTables(offsets, bb);
return createVectorOfTables(offsets);
}
/**
......
java/com/google/flatbuffers/Table.java
View file @ 8fdced4e
......@@ -56,11 +56,14 @@ public class Table {
* @param vtable_offset An `int` offset to the vtable in the Table's ByteBuffer.
* @return Returns an offset into the object, or `0` if the field is not present.
*/
protected int __offset(int vtable_offset) { return __offset(vtable_offset, bb_pos - bb.getInt(bb_pos), bb, false); }
protected int __offset(int vtable_offset) {
int vtable = bb_pos - bb.getInt(bb_pos);
return vtable_offset < bb.getShort(vtable) ? bb.getShort(vtable + vtable_offset) : 0;
}
protected static int __offset(int vtable_offset, int vtable, ByteBuffer _bb, boolean invoked_static) {
if (!invoked_static) return vtable_offset < _bb.getShort(vtable) ? _bb.getShort(vtable + vtable_offset) : 0;
else return _bb.getShort(vtable + vtable_offset - _bb.getInt(vtable)) + vtable;
protected static int __offset(int vtable_offset, int offset, ByteBuffer bb) {
int vtable = bb.array().length - offset;
return bb.getShort(vtable + vtable_offset - bb.getInt(vtable)) + vtable;
}
/**
......@@ -85,15 +88,11 @@ public class Table {
* @return Returns a `String` from the data stored inside the FlatBuffer at `offset`.
*/
protected String __string(int offset) {
return __string(offset, bb);
}
protected static String __string(int offset, ByteBuffer _bb) {
CharsetDecoder decoder = UTF8_DECODER.get();
decoder.reset();
offset += _bb.getInt(offset);
ByteBuffer src = _bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
offset += bb.getInt(offset);
ByteBuffer src = bb.duplicate().order(ByteOrder.LITTLE_ENDIAN);
int length = src.getInt(offset);
src.position(offset + SIZEOF_INT);
src.limit(offset + SIZEOF_INT + length);
......@@ -194,6 +193,52 @@ public class Table {
}
return true;
}
/**
* Sort tables by the key.
*
* @param offsets An 'int' indexes of the tables into the _bb.
* @param bb A {@code ByteBuffer} to get the tables.
*/
protected void sortTables(int[] offsets, ByteBuffer bb) {
Integer[] off = new Integer[offsets.length];
for (int i = 0; i < offsets.length; i++) off[i] = offsets[i];
Arrays.sort(off, (Integer o1, Integer o2) -> keysCompare(o1, o2, bb));
for (int i = 0; i < offsets.length; i++) offsets[i] = off[i];
}
/**
* Compare two tables by the key.
*
* @param o1 An 'Integer' index of the first key into the _bb.
* @param o2 An 'Integer' index of the second key into the _bb.
* @param bb A {@code ByteBuffer} to get the keys.
*/
protected int keysCompare(Integer o1, Integer o2, ByteBuffer bb) { return 0; }
/**
* Compare two strings in the buffer.
*
* @param offset_1 An 'int' index of the first string into the bb.
* @param offset_2 An 'int' index of the second string into the bb.
* @param bb A {@code ByteBuffer} to get the strings.
*/
protected static int compareStrings(int offset_1, int offset_2, ByteBuffer bb) {
offset_1 += bb.getInt(offset_1);
offset_2 += bb.getInt(offset_2);
int len_1 = bb.getInt(offset_1);
int len_2 = bb.getInt(offset_2);
int startPos_1 = offset_1 + SIZEOF_INT;
int startPos_2 = offset_2 + SIZEOF_INT;
int len = Math.min(len_1, len_2);
for(int i = 0; i < len; i++) {
if (bb.array()[i + startPos_1] != bb.array()[i + startPos_2])
return bb.array()[i + startPos_1] - bb.array()[i + startPos_2];
}
if (len_1 < len_2) return -1;
if (len_1 > len_2) return 1;
return 0;
}
}
/// @endcond
net/FlatBuffers/Table.cs
View file @ 8fdced4e
......@@ -31,12 +31,16 @@ namespace FlatBuffers
// Look up a field in the vtable, return an offset into the object, or 0 if the field is not
// present.
protected int __offset(int vtableOffset) { return __offset(vtableOffset, bb_pos - bb.GetInt(bb_pos), bb, false); }
protected int __offset(int vtableOffset)
{
int vtable = bb_pos - bb.GetInt(bb_pos);
return vtableOffset < bb.GetShort(vtable) ? (int)bb.GetShort(vtable + vtableOffset) : 0;
}
protected static int __offset(int vtableOffset, int vtable, ByteBuffer _bb, bool invoked_static)
protected static int __offset(int vtableOffset, int offset, ByteBuffer bb)
{
if (!invoked_static) return vtableOffset < _bb.GetShort(vtable) ? (int)_bb.GetShort(vtable + vtableOffset) : 0;
else return (int)_bb.GetShort(vtable + vtableOffset - _bb.GetInt(vtable)) + vtable;
int vtable = bb.Length - offset;
return (int)bb.GetShort(vtable + vtableOffset - bb.GetInt(vtable)) + vtable;
}
// Retrieve the relative offset stored at "offset"
......@@ -46,14 +50,12 @@ namespace FlatBuffers
}
// Create a .NET String from UTF-8 data stored inside the flatbuffer.
protected string __string(int offset) { return __string(offset, bb); }
protected static string __string(int offset, ByteBuffer _bb)
protected string __string(int offset)
{
offset += _bb.GetInt(offset);
var len = _bb.GetInt(offset);
offset += bb.GetInt(offset);
var len = bb.GetInt(offset);
var startPos = offset + sizeof(int);
return Encoding.UTF8.GetString(_bb.Data, startPos, len);
return Encoding.UTF8.GetString(bb.Data, startPos , len);
}
// Get the length of a vector whose offset is stored at "offset" in this object.
......@@ -108,6 +110,24 @@ namespace FlatBuffers
return true;
}
// Compare strings in the ByteBuffer.
protected static int CompareStrings(int offset_1, int offset_2, ByteBuffer bb)
{
offset_1 += bb.GetInt(offset_1);
offset_2 += bb.GetInt(offset_2);
var len_1 = bb.GetInt(offset_1);
var len_2 = bb.GetInt(offset_2);
var startPos_1 = offset_1 + sizeof(int);
var startPos_2 = offset_2 + sizeof(int);
var len = Math.Min(len_1, len_2);
for(int i = 0; i < len; i++) {
if (bb.Data[i + startPos_1] != bb.Data[i + startPos_2])
return bb.Data[i + startPos_1] - bb.Data[i + startPos_2];
}
if (len_1 < len_2) return -1;
if (len_1 > len_2) return 1;
return 0;
}
}
}
src/idl_gen_general.cpp
View file @ 8fdced4e
......@@ -669,6 +669,60 @@ void GenStructBody(const StructDef &struct_def, std::string *code_ptr, const cha
}
}
void IncChar(std::string &str) {
static int index = -1, num = 1;
if (index < 0) {
for (size_t i = 0; i < str.length(); i++) {
if (str[i] == '!') {
index = i;
break;
}
}
}
str[index] = (char)(num + '0');
num++;
}
std::string GenKeyGetter(flatbuffers::FieldDef *key_field) {
auto data_buffer = (lang_.language == IDLOptions::kCSharp) ?
"builder.DataBuffer" : "_bb";
auto get_offset = "__offset(" +
NumToString(key_field->value.offset) + ", o!" +
(lang_.language == IDLOptions::kCSharp ? ".Value" : "") +
", " + data_buffer + ")";
std::string key_getter = "";
if (key_field->value.type.base_type == BASE_TYPE_STRING) {
if (lang_.language == IDLOptions::kJava)
key_getter += " return ";
key_getter += FunctionStart('C') + "ompareStrings(";
IncChar(get_offset);
key_getter += get_offset + ", ";
IncChar(get_offset);
key_getter += get_offset + ", " + data_buffer + ")";
if (lang_.language == IDLOptions::kJava)
key_getter += ";";
}
else {
auto field_getter = data_buffer + GenGetter(key_field->value.type).substr(2) +
"(" + get_offset + ")";
IncChar(field_getter);
if (lang_.language == IDLOptions::kCSharp) {
key_getter += field_getter;
IncChar(field_getter);
key_getter += ".CompareTo(" + field_getter + ")";
}
else {
key_getter += "\n " + GenTypeGet(key_field->value.type) + " off1 = ";
key_getter += field_getter + ";\n " + GenTypeGet(key_field->value.type);
key_getter += " off2 = ";
IncChar(field_getter);
key_getter += field_getter + ";\n";
}
}
return key_getter;
}
void GenStruct(StructDef &struct_def, std::string *code_ptr) {
if (struct_def.generated) return;
std::string &code = *code_ptr;
......@@ -1133,59 +1187,48 @@ void GenStruct(StructDef &struct_def, std::string *code_ptr) {
}
}
if (struct_def.has_key) {
bool is_string = key_field->value.type.base_type == BASE_TYPE_STRING;
std::string key_name = lang_.language == IDLOptions::kCSharp ? MakeCamel(key_field->name) : key_field->name + "()";
std::string key_type = GenTypeGet(key_field->value.type);
std::string key_offset = NumToString(key_field->value.offset);
std::string key_getter = is_string ? GenGetter(key_field->value.type) : GenGetter(key_field->value.type).substr(2);
std::string data_buffer = lang_.language == IDLOptions::kCSharp ? "builder.DataBuffer" : "bb";
code += "\n public static int " + FunctionStart('K') + "eysCompare(" + key_type + " o1, " + key_type + " o2) ";
if (lang_.language == IDLOptions::kJava && !is_string) {
code += "{\n if (o1 < o2) return -1;\n";
code += " else if (o1 == o2) return 0;\n";
code += " else return 1;\n }\n";
}
else {
code += "{ return o1." + FunctionStart('C') + "ompareTo(o2); }\n";
}
auto is_string = key_field->value.type.base_type == BASE_TYPE_STRING;
auto key_name = "table." +
(lang_.language == IDLOptions::kCSharp ?
MakeCamel(key_field->name) : key_field->name + "()");
code += "\n public int " + FunctionStart('K') + "eyCompareWithValue(" + key_type + " val) ";
if (lang_.language == IDLOptions::kJava && !is_string) {
code += "{\n if (" + key_name + " < val) return -1;\n";
code += " else if (" + key_name + " == val) return 0;\n";
code += " else return 1;\n }\n";
if (lang_.language == IDLOptions::kJava) {
code += "\n @Override\n protected int keysCompare(";
code += "Integer o1, Integer o2, ByteBuffer _bb) {";
code += GenKeyGetter(key_field);
if (!is_string) {
code += " if (off1 < off2) return -1;\n";
code += " else if (off1 == off2) return 0;\n";
code += " else return 1;\n ";
}
code += " }\n";
}
else {
code += "{ return " + key_name + "." + FunctionStart('C') + "ompareTo(val); }\n";
code += "\n public static VectorOffset ";
code += "CreateMySortedTableVector(FlatBufferBuilder builder, ";
code += "Offset<" + struct_def.name + ">";
code += "[] offsets) {\n";
code += " Array.Sort(offsets, (Offset<" + struct_def.name +
"> o1, Offset<" + struct_def.name + "> o2) => " + GenKeyGetter(key_field);
code += ");\n";
code += " return builder.CreateVectorOfTables(offsets);\n }\n";
}
code += "\n public static ";
code += (lang_.language == IDLOptions::kCSharp ? "VectorOffset " : "int ") + FunctionStart('C') + "reateMySortedTableVector(FlatBufferBuilder builder, ";
code += (lang_.language == IDLOptions::kCSharp ? " Offset<" + struct_def.name + ">" : "ByteBuffer bb, int") + "[] off" + (lang_.language == IDLOptions::kCSharp ? "sets" : "") + ") {\n";
if (lang_.language == IDLOptions::kJava) {
code += " Integer[] offsets = new Integer[off.length];\n";
code += " for (int i = 0; i < off.length; i++) offsets[i] = off[i];\n";
}
code += " Array";
code += (lang_.language == IDLOptions::kCSharp ? ".S" : "s.s");
code += "ort(offsets, (";
code += (lang_.language == IDLOptions::kCSharp ? "Offset<" + struct_def.name + "> o1, Offset<" + struct_def.name + "> o2) => " : "Integer o1, Integer o2) -> ");
code += FunctionStart('K') + "eysCompare(";
code += (is_string ? key_getter : data_buffer + key_getter) + "(__offset(" + key_offset + ", " + data_buffer + (lang_.language == IDLOptions::kCSharp ? ".Length - o1.Value" : ".array().length - o1");
code += ", " + data_buffer + ", true)" + (is_string ? ", " + data_buffer : "") + "),\n ";
code += (is_string ? key_getter : data_buffer + key_getter) + "(__offset(" + key_offset + ", " + data_buffer + (lang_.language == IDLOptions::kCSharp ? ".Length - o2.Value" : ".array().length - o2");
code += ", " + data_buffer + ", true)" + (is_string ? ", " + data_buffer : "") + ")));\n";
if (lang_.language == IDLOptions::kJava) code += " for (int i = 0; i < off.length; i++) off[i] = offsets[i];\n";
code += " return builder." + FunctionStart('C') + "reateVectorOfTables(off" + (lang_.language == IDLOptions::kCSharp ? "sets" : "") + ");\n }\n";
code += "\n public static " + struct_def.name + " " + FunctionStart('L') + "ookupByKey(" + struct_def.name;
code += "[] tables, " + key_type + " key) {\n";
code += "\n public static " + struct_def.name + " " + FunctionStart('L');
code += "ookupByKey(" + struct_def.name;
code += "[] tables, " + GenTypeGet(key_field->value.type) + " key) {\n";
code += " int span = tables." + FunctionStart('L') + "ength, start = 0;\n";
code += " while (span != 0) {\n";
code += " int middle = span / 2;\n";
code += " " + struct_def.name + " table = tables[start + middle];\n";
code += " int comp = table." + FunctionStart('K') + "eyCompareWithValue(key);\n";
if (lang_.language == IDLOptions::kCSharp || is_string) {
code += " int comp = " + key_name + "." + FunctionStart('C');
code += "ompareTo(key);\n";
}
else {
code += " int comp = " + key_name + " > key ? 1 : " + key_name;
code += " < key ? -1 : 0;\n";
}
code += " if (comp > 0) span = middle;\n";
code += " else if (comp < 0) {\n";
code += " middle++;\n";
......
tests/JavaTest.java
View file @ 8fdced4e
......@@ -62,7 +62,7 @@ class JavaTest {
Monster.startMonster(fbb);
Monster.addName(fbb, names[2]);
off[2] = Monster.endMonster(fbb);
int sortMons = fbb.createSortedTableVector(Monster.class, off);
int sortMons = fbb.createSortedTableVector(new Monster(), off);
// We set up the same values as monsterdata.json:
......
tests/MyGame/Example/Monster.cs
View file @ 8fdced4e
......@@ -130,13 +130,8 @@ public sealed class Monster : Table {
}
public static void FinishMonsterBuffer(FlatBufferBuilder builder, Offset<Monster> offset) { builder.Finish(offset.Value, "MONS"); }
public static int KeysCompare(string o1, string o2) { return o1.CompareTo(o2); }
public int KeyCompareWithValue(string val) { return Name.CompareTo(val); }
public static VectorOffset CreateMySortedTableVector(FlatBufferBuilder builder, Offset<Monster>[] offsets) {
Array.Sort(offsets, (Offset<Monster> o1, Offset<Monster> o2) => KeysCompare(__string(__offset(10, builder.DataBuffer.Length - o1.Value, builder.DataBuffer, true), builder.DataBuffer),
__string(__offset(10, builder.DataBuffer.Length - o2.Value, builder.DataBuffer, true), builder.DataBuffer)));
Array.Sort(offsets, (Offset<Monster> o1, Offset<Monster> o2) => CompareStrings(__offset(10, o1.Value, builder.DataBuffer), __offset(10, o2.Value, builder.DataBuffer), builder.DataBuffer));
return builder.CreateVectorOfTables(offsets);
}
......@@ -145,7 +140,7 @@ public sealed class Monster : Table {
while (span != 0) {
int middle = span / 2;
Monster table = tables[start + middle];
int comp = table.KeyCompareWithValue(key);
int comp = table.Name.CompareTo(key);
if (comp > 0) span = middle;
else if (comp < 0) {
middle++;
......
tests/MyGame/Example/Monster.java
View file @ 8fdced4e
......@@ -136,25 +136,15 @@ public final class Monster extends Table {
}
public static void finishMonsterBuffer(FlatBufferBuilder builder, int offset) { builder.finish(offset, "MONS"); }
public static int keysCompare(String o1, String o2) { return o1.compareTo(o2); }
public int keyCompareWithValue(String val) { return name().compareTo(val); }
public static int createMySortedTableVector(FlatBufferBuilder builder, ByteBuffer bb, int[] off) {
Integer[] offsets = new Integer[off.length];
for (int i = 0; i < off.length; i++) offsets[i] = off[i];
Arrays.sort(offsets, (Integer o1, Integer o2) -> keysCompare(__string(__offset(10, bb.array().length - o1, bb, true), bb),
__string(__offset(10, bb.array().length - o2, bb, true), bb)));
for (int i = 0; i < off.length; i++) off[i] = offsets[i];
return builder.createVectorOfTables(off);
}
@Override
protected int keysCompare(Integer o1, Integer o2, ByteBuffer _bb) { return compareStrings(__offset(10, o1, _bb), __offset(10, o2, _bb), _bb); }
public static Monster lookupByKey(Monster[] tables, String key) {
int span = tables.length, start = 0;
while (span != 0) {
int middle = span / 2;
Monster table = tables[start + middle];
int comp = table.keyCompareWithValue(key);
int comp = table.name().compareTo(key);
if (comp > 0) span = middle;
else if (comp < 0) {
middle++;
......
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