private static void CompileStringFromSlice(FunctionCompiler compiler, FunctionalNode stringFromSliceNode)
{
VariableReference input = stringFromSliceNode.InputTerminals[0].GetTrueVariable(),
output = stringFromSliceNode.OutputTerminals[1].GetTrueVariable();
Action <FunctionCompiler> loadStringOutputAllocationReference = c => c.LoadLocalAllocationReference(output);
// Get a pointer to a heap allocation big enough for the string
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, 0);
compiler.LoadStringSliceReferenceSizeReference(input);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitAlloc_TEMP();
compiler._builder.EmitStorePointer();
// Copy the data from the string slice to the heap allocation
compiler.LoadStringSliceReferencePointer(input);
compiler._builder.EmitDerefPointer();
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, 0);
compiler._builder.EmitDerefPointer();
compiler.LoadStringSliceReferenceSizeReference(input);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitCopyBytes_TEMP();
// Copy actual size into string handle
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, TargetConstants.PointerSize);
compiler.LoadStringSliceReferenceSizeReference(input);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitStoreInteger();
}
private static void CompileOutput(FunctionCompiler compiler, FunctionalNode outputNode)
{
VariableReference input = outputNode.InputTerminals.ElementAt(0).GetTrueVariable();
NIType referentType = input.Type.GetReferentType();
if (referentType.IsInt32())
{
compiler.LoadValueAsReference(input);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitOutput_TEMP();
}
else if (referentType.IsString())
{
compiler.LoadValueAsReference(input);
compiler._builder.EmitDerefPointer();
compiler.LoadValueAsReference(input);
compiler._builder.EmitLoadIntegerImmediate(TargetConstants.PointerSize);
compiler._builder.EmitAdd();
compiler._builder.EmitDerefInteger();
compiler._builder.EmitOutputString_TEMP();
}
else if (referentType == DataTypes.StringSliceType)
{
compiler.LoadStringSliceReferencePointer(input);
compiler._builder.EmitDerefPointer();
compiler.LoadStringSliceReferenceSizeReference(input);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitOutputString_TEMP();
}
else
{
throw new NotImplementedException($"Don't know how to display type {referentType} yet.");
}
}
private static void CompileStringAppend(FunctionCompiler compiler, FunctionalNode stringAppendNode)
{
VariableReference stringInput = stringAppendNode.InputTerminals[0].GetTrueVariable(),
sliceInput = stringAppendNode.InputTerminals[1].GetTrueVariable();
Action <FunctionCompiler> loadStringInputReference = c => c.LoadValueAsReference(stringInput);
// for now, always create a new allocation, rather than trying to use existing one
// TODO: free the old allocation
// compute and store the size first to use it later
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, TargetConstants.PointerSize);
compiler._builder.EmitDerefInteger();
compiler.LoadStringSliceReferenceSizeReference(sliceInput);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitAdd();
compiler._builder.EmitDuplicate();
compiler._builder.EmitAlloc_TEMP();
compiler._builder.EmitDuplicate();
// copy from old allocation to new allocation, then overwrite old allocation pointer
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, 0);
compiler._builder.EmitDerefPointer();
compiler._builder.EmitSwap();
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, TargetConstants.PointerSize);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitCopyBytes_TEMP();
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, 0);
compiler._builder.EmitSwap();
compiler._builder.EmitStorePointer();
// copy from slice to offset in new allocation
compiler.LoadStringSliceReferencePointer(sliceInput);
compiler._builder.EmitDerefPointer();
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, 0);
compiler._builder.EmitDerefPointer();
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, TargetConstants.PointerSize);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitAdd();
compiler.LoadStringSliceReferenceSizeReference(sliceInput);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitCopyBytes_TEMP();
// copy total size to string
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, TargetConstants.PointerSize);
compiler._builder.EmitSwap();
compiler._builder.EmitStoreInteger();
}
private static void CompileStringConcat(FunctionCompiler compiler, FunctionalNode stringConcatNode)
{
VariableReference input1 = stringConcatNode.InputTerminals[0].GetTrueVariable(),
input2 = stringConcatNode.InputTerminals[1].GetTrueVariable(),
output = stringConcatNode.OutputTerminals[2].GetTrueVariable();
Action <FunctionCompiler> loadStringOutputAllocationReference = c => c.LoadLocalAllocationReference(output);
// compute and store the size first to use it later
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, TargetConstants.PointerSize);
compiler.LoadStringSliceReferenceSizeReference(input1);
compiler._builder.EmitDerefInteger();
compiler.LoadStringSliceReferenceSizeReference(input2);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitAdd();
compiler._builder.EmitStoreInteger();
// allocate a new string with stored size
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, 0);
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, TargetConstants.PointerSize);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitAlloc_TEMP();
compiler._builder.EmitStorePointer();
// copy data from both slices
compiler.LoadStringSliceReferencePointer(input1);
compiler._builder.EmitDerefPointer();
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, 0);
compiler._builder.EmitDerefPointer();
compiler.LoadStringSliceReferenceSizeReference(input1);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitCopyBytes_TEMP();
compiler.LoadStringSliceReferencePointer(input2);
compiler._builder.EmitDerefPointer();
compiler.LoadConstantOffsetFromPointer(loadStringOutputAllocationReference, 0);
compiler._builder.EmitDerefPointer();
compiler.LoadStringSliceReferenceSizeReference(input1);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitAdd();
compiler.LoadStringSliceReferenceSizeReference(input2);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitCopyBytes_TEMP();
}
private static void CompileStringToSlice(FunctionCompiler compiler, FunctionalNode stringToSliceNode)
{
VariableReference input = stringToSliceNode.InputTerminals[0].GetTrueVariable(),
output = stringToSliceNode.OutputTerminals[0].GetTrueVariable();
Action <FunctionCompiler> loadStringInputReference = c => c.LoadValueAsReference(input);
compiler.LoadStringSliceReferencePointer(output);
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, 0);
compiler._builder.EmitDerefPointer();
compiler._builder.EmitStorePointer();
compiler.LoadStringSliceReferenceSizeReference(output);
compiler.LoadConstantOffsetFromPointer(loadStringInputReference, TargetConstants.PointerSize);
compiler._builder.EmitDerefInteger();
compiler._builder.EmitStoreInteger();
}
