// Locate the next occurrence of the given character in the receiver between the specified indices.
BOOL __fastcall Interpreter::primitiveStringNextIndexOfFromTo()
{
Oop integerPointer = stackTop();
if (!ObjectMemoryIsIntegerObject(integerPointer))
return primitiveFailure(0); // to not an integer
const SMALLINTEGER to = ObjectMemoryIntegerValueOf(integerPointer);
integerPointer = stackValue(1);
if (!ObjectMemoryIsIntegerObject(integerPointer))
return primitiveFailure(1); // from not an integer
SMALLINTEGER from = ObjectMemoryIntegerValueOf(integerPointer);
Oop valuePointer = stackValue(2);
StringOTE* receiverPointer = reinterpret_cast<StringOTE*>(stackValue(3));
Oop answer = ZeroPointer;
if ((ObjectMemory::fetchClassOf(valuePointer) == Pointers.ClassCharacter) && to >= from)
{
ASSERT(!receiverPointer->isPointers());
// Search a byte object
const SMALLINTEGER length = receiverPointer->bytesSize();
// We can only be in here if to>=from, so if to>=1, then => from >= 1
// furthermore if to <= length then => from <= length
if (from < 1 || to > length)
return primitiveFailure(2);
// Search is in bounds, lets do it
CharOTE* oteChar = reinterpret_cast<CharOTE*>(valuePointer);
Character* charObj = oteChar->m_location;
const char charValue = static_cast<char>(ObjectMemoryIntegerValueOf(charObj->m_asciiValue));
String* chars = receiverPointer->m_location;
from--;
while (from < to)
{
if (chars->m_characters[from++] == charValue)
{
answer = ObjectMemoryIntegerObjectOf(from);
break;
}
}
}
stackValue(3) = answer;
pop(3);
return primitiveSuccess();
}
// This primitive handles PositionableStream>>next, but only for Arrays, Strings and ByteArrays
// Unary message, so does not modify stack pointer, and is therefore called directly from the ASM
// primitive table without indirection through an ASM thunk.
BOOL __fastcall Interpreter::primitiveNext()
{
PosStreamOTE* streamPointer = reinterpret_cast<PosStreamOTE*>(stackTop()); // Access receiver
// Only works for subclasses of PositionableStream (or look alikes)
//ASSERT(!ObjectMemoryIsIntegerObject(streamPointer) && ObjectMemory::isKindOf(streamPointer, Pointers.ClassPositionableStream));
PositionableStream* readStream = streamPointer->m_location;
// Ensure valid stream - unusually this validity check is included in the Blue Book spec
// and appears to be implemented in most Smalltalks, so we implement here too.
if (!ObjectMemoryIsIntegerObject(readStream->m_index) ||
!ObjectMemoryIsIntegerObject(readStream->m_readLimit))
return primitiveFailure(0); // Receiver fails invariant check
SMALLINTEGER index = ObjectMemoryIntegerValueOf(readStream->m_index);
SMALLINTEGER limit = ObjectMemoryIntegerValueOf(readStream->m_readLimit);
// Is the current index within the limits of the collection?
// Remember that the index is 1 based (it's a Smalltalk index), and we're 0 based,
// so we don't need to increment it until after we've got the next object
if (index < 0 || index >= limit)
return primitiveFailure(2); // No, fail it
OTE* oteBuf = readStream->m_array;
BehaviorOTE* bufClass = oteBuf->m_oteClass;
if (bufClass == Pointers.ClassString)
{
StringOTE* oteString = reinterpret_cast<StringOTE*>(oteBuf);
// A sanity check - ensure within bounds of object too (again in Blue Book spec)
if (MWORD(index) >= oteString->bytesSize())
return primitiveFailure(3);
String* buf = oteString->m_location;
stackTop() = reinterpret_cast<Oop>(Character::New(buf->m_characters[index]));
}
// We also support ByteArrays in our primitiveNext (unlike BB).
else if (bufClass == Pointers.ClassByteArray)
{
ByteArrayOTE* oteBytes = reinterpret_cast<ByteArrayOTE*>(oteBuf);
if (MWORD(index) >= oteBytes->bytesSize())
return primitiveFailure(3);
ByteArray* buf = oteBytes->m_location;
stackTop() = ObjectMemoryIntegerObjectOf(buf->m_elements[index]);
}
else if (bufClass == Pointers.ClassArray)
{
ArrayOTE* oteArray = reinterpret_cast<ArrayOTE*>(oteBuf);
if (MWORD(index) >= oteArray->pointersSize())
return primitiveFailure(3);
Array* buf = oteArray->m_location;
stackTop() = buf->m_elements[index];
}
else
return primitiveFailure(1); // Collection cannot be handled by primitive, rely on Smalltalk code
// When incrementing the index we must allow for it overflowing a SmallInteger, even though
// this is extremely unlikely in practice
readStream->m_index = Integer::NewSigned32WithRef(index+1);
return primitiveSuccess(); // Succeed
}
// Non-standard, but has very beneficial effect on performance
BOOL __fastcall Interpreter::primitiveNextPutAll()
{
Oop* sp = m_registers.m_stackPointer;
WriteStreamOTE* streamPointer = reinterpret_cast<WriteStreamOTE*>(*(sp-1)); // Access receiver under argument
WriteStream* writeStream = streamPointer->m_location;
// Ensure valid stream - checks from Blue Book
if (!ObjectMemoryIsIntegerObject(writeStream->m_index) ||
!ObjectMemoryIsIntegerObject(writeStream->m_writeLimit))
return primitiveFailure(0); // Fails invariant check
SMALLINTEGER index = ObjectMemoryIntegerValueOf(writeStream->m_index);
SMALLINTEGER limit = ObjectMemoryIntegerValueOf(writeStream->m_writeLimit);
if (index < 0)
return primitiveFailure(2);
Oop value = *(sp);
OTE* oteBuf = writeStream->m_array;
BehaviorOTE* bufClass = oteBuf->m_oteClass;
MWORD newIndex;
if (bufClass == Pointers.ClassString)
{
BehaviorOTE* oteClass = ObjectMemory::fetchClassOf(value);
if (oteClass != Pointers.ClassString && oteClass != Pointers.ClassSymbol)
return primitiveFailure(4); // Attempt to put non-string
StringOTE* oteString = reinterpret_cast<StringOTE*>(value);
String* str = oteString->m_location;
MWORD valueSize = oteString->bytesSize();
newIndex = MWORD(index)+valueSize;
if (newIndex >= static_cast<MWORD>(limit)) // Beyond write limit
return primitiveFailure(2);
if (static_cast<int>(newIndex) >= oteBuf->bytesSizeForUpdate())
return primitiveFailure(3); // Attempt to write off end of buffer
String* buf = static_cast<String*>(oteBuf->m_location);
memcpy(buf->m_characters+index, str->m_characters, valueSize);
}
else if (bufClass == Pointers.ClassByteArray)
{
if (ObjectMemory::fetchClassOf(value) != bufClass)
return primitiveFailure(4); // Attempt to put non-ByteArray
ByteArrayOTE* oteBytes = reinterpret_cast<ByteArrayOTE*>(value);
ByteArray* bytes = oteBytes->m_location;
MWORD valueSize = oteBytes->bytesSize();
newIndex = MWORD(index)+valueSize;
if (newIndex >= (MWORD)limit) // Beyond write limit
return primitiveFailure(2);
if (static_cast<int>(newIndex) >= oteBuf->bytesSizeForUpdate())
return primitiveFailure(3); // Attempt to write off end of buffer
ByteArray* buf = static_cast<ByteArray*>(oteBuf->m_location);
memcpy(buf->m_elements+index, bytes->m_elements, valueSize);
}
else if (bufClass == Pointers.ClassArray)
{
if (ObjectMemory::fetchClassOf(value) != Pointers.ClassArray)
return primitiveFailure(4); // Attempt to put non-Array
ArrayOTE* oteArray = reinterpret_cast<ArrayOTE*>(value);
Array* array = oteArray->m_location;
MWORD valueSize = oteArray->pointersSize();
newIndex = MWORD(index) + valueSize;
if (newIndex >= (MWORD)limit) // Beyond write limit
return primitiveFailure(2);
if (static_cast<int>(newIndex) >= oteBuf->pointersSizeForUpdate())
return primitiveFailure(3); // Attempt to write off end of buffer
Array* buf = static_cast<Array*>(oteBuf->m_location);
for (MWORD i = 0; i < valueSize; i++)
{
ObjectMemory::storePointerWithValue(buf->m_elements[index + i], array->m_elements[i]);
}
}
else
return primitiveFailure(1);
writeStream->m_index = Integer::NewUnsigned32WithRef(newIndex); // Increment the stream index
// As we no longer pop stack here, the receiver is still under the argument
*(sp-1) = value;
return sizeof(Oop); // Pop 4 bytes
}
// This primitive handles WriteStream>>NextPut:, but only for Arrays, Strings & ByteArrays
// Uses but does not modify stack pointer, instead returns the number of bytes to
// pop from the Smalltalk stack.
BOOL __fastcall Interpreter::primitiveNextPut()
{
Oop* sp = m_registers.m_stackPointer;
WriteStreamOTE* streamPointer = reinterpret_cast<WriteStreamOTE*>(*(sp-1)); // Access receiver under argument
//ASSERT(!ObjectMemoryIsIntegerObject(streamPointer) && ObjectMemory::isKindOf(streamPointer, Pointers.ClassPositionableStream));
WriteStream* writeStream = streamPointer->m_location;
// Ensure valid stream - checks from Blue Book
if (!ObjectMemoryIsIntegerObject(writeStream->m_index) ||
!ObjectMemoryIsIntegerObject(writeStream->m_writeLimit))
return primitiveFailure(0); // Fails invariant check
SMALLINTEGER index = ObjectMemoryIntegerValueOf(writeStream->m_index);
SMALLINTEGER limit = ObjectMemoryIntegerValueOf(writeStream->m_writeLimit);
// Within the bounds of the limit
if (index < 0 || index >= limit)
return primitiveFailure(2);
Oop value = *(sp);
OTE* oteBuf = writeStream->m_array;
BehaviorOTE* bufClass = oteBuf->m_oteClass;
if (bufClass == Pointers.ClassString)
{
if (ObjectMemory::fetchClassOf(value) != Pointers.ClassCharacter)
return primitiveFailure(4); // Attempt to put non-character
StringOTE* oteString = reinterpret_cast<StringOTE*>(oteBuf);
if (index >= oteString->bytesSizeForUpdate())
return primitiveFailure(3); // Attempt to put non-character or off end of String
String* buf = oteString->m_location;
CharOTE* oteChar = reinterpret_cast<CharOTE*>(value);
buf->m_characters[index] = static_cast<char>(oteChar->getIndex() - ObjectMemory::FirstCharacterIdx);
}
else if (bufClass == Pointers.ClassArray)
{
ArrayOTE* oteArray = reinterpret_cast<ArrayOTE*>(oteBuf);
// In bounds of Array?
if (index >= oteArray->pointersSizeForUpdate())
return primitiveFailure(3);
Array* buf = oteArray->m_location;
// We must ref. count value here as we're storing into a heap object slot
ObjectMemory::storePointerWithValue(buf->m_elements[index], value);
}
else if (bufClass == Pointers.ClassByteArray)
{
if (!ObjectMemoryIsIntegerObject(value))
return primitiveFailure(4); // Attempt to put non-SmallInteger
SMALLINTEGER intValue = ObjectMemoryIntegerValueOf(value);
if (intValue < 0 || intValue > 255)
return primitiveFailure(4); // Can only store 0..255
ByteArrayOTE* oteByteArray = reinterpret_cast<ByteArrayOTE*>(oteBuf);
if (index >= oteByteArray->bytesSizeForUpdate())
return primitiveFailure(3); // Attempt to put non-character or off end of String
oteByteArray->m_location->m_elements[index] = static_cast<BYTE>(intValue);
}
else
return primitiveFailure(1);
writeStream->m_index = Integer::NewSigned32WithRef(index + 1); // Increment the stream index
// As we no longer pop stack here, the receiver is still under the argument
*(sp-1) = value;
return sizeof(Oop); // Pop 4 bytes
}
