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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| #if INTERFACE | ||
| #include <Engine/Bytecode/Types.h> | ||
| #include <Engine/Bytecode/CompilerEnums.h> | ||
|
|
||
| class Bytecode { | ||
| public: | ||
| static const char* Magic; | ||
| static Uint32 LatestVersion; | ||
| static vector<const char*> FunctionNames; | ||
|
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| vector<ObjFunction*> Functions; | ||
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| Uint8 Version; | ||
| bool HasDebugInfo = false; | ||
| const char* SourceFilename = nullptr; | ||
| }; | ||
| #endif | ||
|
|
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| #include <Engine/Bytecode/Bytecode.h> | ||
| #include <Engine/IO/MemoryStream.h> | ||
| #include <Engine/Utilities/StringUtils.h> | ||
|
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| const char* Bytecode::Magic = "HTVM"; | ||
| Uint32 Bytecode::LatestVersion = 0; | ||
| vector<const char*> Bytecode::FunctionNames{ "<anonymous-fn>", "main" }; | ||
|
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| PUBLIC Bytecode::Bytecode() { | ||
| Version = LatestVersion; | ||
| } | ||
|
|
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| PUBLIC Bytecode::~Bytecode() { | ||
| Memory::Free((void*)SourceFilename); | ||
| } | ||
|
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| PUBLIC bool Bytecode::Read(BytecodeContainer bytecode, HashMap<char*>* tokens) { | ||
| MemoryStream* stream = MemoryStream::New(bytecode.Data, bytecode.Size); | ||
| if (!stream) | ||
| return false; | ||
|
|
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| Uint8 magic[4]; | ||
| stream->ReadBytes(magic, 4); | ||
| if (memcmp(Bytecode::Magic, magic, 4) != 0) { | ||
| Log::Print(Log::LOG_ERROR, "Incorrect magic!"); | ||
| stream->Close(); | ||
| return false; | ||
| } | ||
|
|
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| Version = stream->ReadByte(); | ||
| Uint8 opts = stream->ReadByte(); | ||
| stream->Skip(1); | ||
| stream->Skip(1); | ||
|
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| HasDebugInfo = opts & 1; | ||
|
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| int chunkCount = stream->ReadInt32(); | ||
| if (!chunkCount) | ||
| return false; | ||
|
|
||
| for (int i = 0; i < chunkCount; i++) { | ||
| int length = stream->ReadInt32(); | ||
| int arity = stream->ReadInt32(); | ||
| Uint32 hash = stream->ReadUInt32(); | ||
|
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| ObjFunction* function = NewFunction(); | ||
| function->Arity = arity; | ||
| function->NameHash = hash; | ||
| function->Chunk.Count = length; | ||
| function->Chunk.OwnsMemory = false; | ||
|
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| function->Chunk.Code = stream->pointer; | ||
| stream->Skip(length * sizeof(Uint8)); | ||
|
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| if (HasDebugInfo) { | ||
| function->Chunk.Lines = (int*)stream->pointer; | ||
| stream->Skip(length * sizeof(int)); | ||
| } | ||
|
|
||
| int constantCount = stream->ReadInt32(); | ||
| for (int c = 0; c < constantCount; c++) { | ||
| Uint8 type = stream->ReadByte(); | ||
| switch (type) { | ||
| case VAL_INTEGER: | ||
| function->Chunk.AddConstant(INTEGER_VAL(stream->ReadInt32())); | ||
| break; | ||
| case VAL_DECIMAL: | ||
| function->Chunk.AddConstant(DECIMAL_VAL(stream->ReadFloat())); | ||
| break; | ||
| case VAL_OBJECT: | ||
| function->Chunk.AddConstant(OBJECT_VAL(TakeString(stream->ReadString()))); | ||
| break; | ||
| } | ||
| } | ||
|
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| Functions.push_back(function); | ||
| } | ||
|
|
||
| if (HasDebugInfo) { | ||
| int tokenCount = stream->ReadInt32(); | ||
| for (int t = 0; t < tokenCount; t++) { | ||
| char* string = stream->ReadString(); | ||
| if (!tokens) | ||
| stream->SkipString(); | ||
| else { | ||
| Uint32 hash = Murmur::EncryptString(string); | ||
| if (!tokens->Exists(hash)) | ||
| tokens->Put(hash, string); | ||
| else | ||
| Memory::Free(string); | ||
| } | ||
| } | ||
|
|
||
| if (tokens) { | ||
| for (ObjFunction* function : Functions) { | ||
| if (tokens->Exists(function->NameHash)) | ||
| function->Name = CopyString(tokens->Get(function->NameHash)); | ||
| } | ||
| } | ||
| } | ||
|
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| bool hasSourceFilename = opts & 2; | ||
| if (hasSourceFilename) { | ||
| SourceFilename = stream->ReadString(); | ||
|
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| ObjString* srcFilename = CopyString(SourceFilename); | ||
| for (ObjFunction* function : Functions) | ||
| function->SourceFilename = srcFilename; | ||
| } | ||
|
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| return true; | ||
| } | ||
|
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| PUBLIC void Bytecode::Write(Stream* stream, const char* sourceFilename, HashMap<Token>* tokenMap) { | ||
| bool hasSourceFilename = sourceFilename != nullptr; | ||
|
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| stream->WriteBytes((char*)Bytecode::Magic, 4); | ||
| stream->WriteByte(Version); | ||
| stream->WriteByte((hasSourceFilename << 1) | HasDebugInfo); | ||
| stream->WriteByte(0x00); | ||
| stream->WriteByte(0x00); | ||
|
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| int chunkCount = (int)Functions.size(); | ||
|
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| stream->WriteUInt32(chunkCount); | ||
| for (int c = 0; c < chunkCount; c++) { | ||
| int arity = Functions[c]->Arity; | ||
| Chunk* chunk = &Functions[c]->Chunk; | ||
|
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| stream->WriteUInt32(chunk->Count); | ||
| stream->WriteUInt32(arity); | ||
| stream->WriteUInt32(Murmur::EncryptString(Functions[c]->Name->Chars)); | ||
|
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| stream->WriteBytes(chunk->Code, chunk->Count); | ||
| if (HasDebugInfo) { | ||
| stream->WriteBytes(chunk->Lines, chunk->Count * sizeof(int)); | ||
| } | ||
|
|
||
| int constSize = (int)chunk->Constants->size(); | ||
| stream->WriteUInt32(constSize); | ||
| for (int i = 0; i < constSize; i++) { | ||
| VMValue constt = (*chunk->Constants)[i]; | ||
| Uint8 type = (Uint8)constt.Type; | ||
| stream->WriteByte(type); | ||
|
|
||
| switch (type) { | ||
| case VAL_INTEGER: | ||
| stream->WriteBytes(&AS_INTEGER(constt), sizeof(int)); | ||
| break; | ||
| case VAL_DECIMAL: | ||
| stream->WriteBytes(&AS_DECIMAL(constt), sizeof(float)); | ||
| break; | ||
| case VAL_OBJECT: | ||
| if (OBJECT_TYPE(constt) == OBJ_STRING) { | ||
| ObjString* str = AS_STRING(constt); | ||
| stream->WriteBytes(str->Chars, str->Length + 1); | ||
| } | ||
| else { | ||
| printf("Unsupported object type...Chief. (%s)\n", GetObjectTypeString(OBJECT_TYPE(constt))); | ||
| stream->WriteByte(0); | ||
| } | ||
| break; | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Add tokens | ||
| if (HasDebugInfo && tokenMap) { | ||
| stream->WriteUInt32(tokenMap->Count + FunctionNames.size()); | ||
| std::for_each(FunctionNames.begin(), FunctionNames.end(), [stream](const char* name) { | ||
| stream->WriteBytes((void*)name, strlen(name) + 1); | ||
| }); | ||
| tokenMap->WithAll([stream](Uint32, Token t) -> void { | ||
| stream->WriteBytes(t.Start, t.Length); | ||
| stream->WriteByte(0); // NULL terminate | ||
| }); | ||
| } | ||
|
|
||
| if (hasSourceFilename) | ||
| stream->WriteBytes((void*)sourceFilename, strlen(sourceFilename) + 1); | ||
| } |
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