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lpinternalmethods_algorithm.pas
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lpinternalmethods_algorithm.pas
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{
Author: Niels A.D
Project: Lape (https://github.com/nielsAD/lape)
License: GNU Lesser GPL (http://www.gnu.org/licenses/lgpl.html)
}
unit lpinternalmethods_algorithm;
{$I lape.inc}
interface
uses
Classes, SysUtils,
lptypes, lptree, lpvartypes;
type
TLapeTree_InternalMethod_SortWeighted = class(TLapeTree_InternalMethod)
public
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_Sort = class(TLapeTree_InternalMethod)
public
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_Sorted = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_Reverse = class(TLapeTree_InternalMethod)
public
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_Reversed = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_Unique = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayMedian = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayMode = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayMin = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayMax = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArraySum = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayMean = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayVariance = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
TLapeTree_InternalMethod_ArrayStdev = class(TLapeTree_InternalMethod)
public
function resType: TLapeType; override;
function Compile(var Offset: Integer): TResVar; override;
end;
const
_LapeSort: lpString =
'procedure _Sort(p: Pointer; ElSize, Len: SizeInt; Compare: _LapeCompareFunc); overload;' + LineEnding +
'const' + LineEnding +
' ShellSortGaps = [835387, 392925, 184011, 85764, 39744, 18298, 8359,' + LineEnding +
' 3785, 1695, 701, 301, 132, 57, 23, 10, 4, 1];' + LineEnding +
'var' + LineEnding +
' Gap, Hi, i, j: SizeInt;' + LineEnding +
' Item, Src: Pointer;' + LineEnding +
'begin' + LineEnding +
' Item := GetMem(ElSize);' + LineEnding +
' Hi := Len - 1;' + LineEnding +
'' + LineEnding +
' for Gap in ShellSortGaps do' + LineEnding +
' for i := Gap to Hi do' + LineEnding +
' begin' + LineEnding +
' Move(p[i * ElSize]^, Item^, ElSize);' + LineEnding +
'' + LineEnding +
' j := i;' + LineEnding +
' while (j >= Gap) do' + LineEnding +
' begin' + LineEnding +
' Src := p[(j - Gap) * ElSize];' + LineEnding +
' if (Compare(Src^, Item^) <= 0) then' + LineEnding +
' Break;' + LineEnding +
'' + LineEnding +
' Move(Src^, p[j * ElSize]^, ElSize);' + LineEnding +
' Move(Item^, Src^, ElSize);' + LineEnding +
' j := j - Gap;' + LineEnding +
' end;' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' FreeMem(Item);' + LineEnding +
'end;';
_LapeArrayUnique: lpString =
'procedure _Unique(var p: Pointer; ElSize: SizeInt; Equals: _LapeEqualsFunc;' + LineEnding +
' Dispose: private procedure(p: Pointer);' + LineEnding +
' Copy: private procedure(Src: ConstPointer; Dst: Pointer)); overload;' + LineEnding +
'type' + LineEnding +
' PSizeInt = ^SizeInt;' + LineEnding +
'var' + LineEnding +
' I, Len, NewLen: SizeInt;' + LineEnding +
' Cur: Pointer;' + LineEnding +
' Upper: PtrUInt;' + LineEnding +
'begin' + LineEnding +
' if (p = nil) then' + LineEnding +
' Exit;' + LineEnding +
'' + LineEnding +
' NewLen := 0;' + LineEnding +
' Len := PSizeInt(p)[-1]^' {$IFDEF FPC}+'+1'{$ENDIF}+';' + LineEnding +
' Upper := PtrUInt(p + (Len * ElSize));' + LineEnding +
' Cur := p;' + LineEnding +
'' + LineEnding +
' while (PtrUInt(Cur) < Upper) do' + LineEnding +
' begin' + LineEnding +
' I := 0;' + LineEnding +
' while (I < NewLen) do' + LineEnding +
' begin' + LineEnding +
' if Equals(Cur^, p[I * ElSize]^) then' + LineEnding +
' Break;' + LineEnding +
' Inc(I);' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' if (I = NewLen) then' + LineEnding +
' begin' + LineEnding +
' if (Pointer(Copy) = nil) then' + LineEnding +
' Move(Cur^, p[NewLen * ElSize]^, ElSize)' + LineEnding +
' else' + LineEnding +
' Copy(Cur^, p[NewLen * ElSize]^);' + LineEnding +
'' + LineEnding +
' Inc(NewLen);' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' Inc(Cur, ElSize);' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' _ArraySetLength(p, NewLen, ElSize, Dispose, nil);' + LineEnding +
'end;';
_LapeArrayMode: lpString =
'function _ArrayMode(p: Pointer; ElSize, Len: SizeInt;' + LineEnding +
' Equals: _LapeEqualsFunc): SizeInt; overload;' + LineEnding +
'var' + LineEnding +
' i, Hits, Best, Index: SizeInt;' + LineEnding +
' Cur: Pointer;' + LineEnding +
'begin' + LineEnding +
' Result := 0;' + LineEnding +
' Index := 0;' + LineEnding +
' Hits := 1;' + LineEnding +
'' + LineEnding +
' Cur := p;' + LineEnding +
' Inc(p, ElSize);' + LineEnding +
'' + LineEnding +
' for i := 1 to Len - 1 do' + LineEnding +
' begin' + LineEnding +
' if not Equals(p^, Cur^) then' + LineEnding +
' begin' + LineEnding +
' if (Hits > Best) then' + LineEnding +
' begin' + LineEnding +
' Best := Hits;' + LineEnding +
' Result := Index;' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' Index := i;' + LineEnding +
' Hits := 0;' + LineEnding +
' Cur := p;' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' Inc(Hits);' + LineEnding +
' Inc(p, ElSize);' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' if (Hits > Best) then' + LineEnding +
' Result := Index;' + LineEnding +
'end;';
_LapeArrayMinMax: lpString =
'function _ArrayMinMax(p: Pointer; ElSize, Start, Len: SizeInt;' + LineEnding +
' Func: _LapeEqualsFunc): SizeInt;' + LineEnding +
'var' + LineEnding +
' i: SizeInt;' + LineEnding +
' Cur: Pointer;' + LineEnding +
'begin' + LineEnding +
' Result := 0;' + LineEnding +
'' + LineEnding +
' Cur := p;' + LineEnding +
' Inc(p, ElSize);' + LineEnding +
'' + LineEnding +
' for i := 1 to Len - 1 do' + LineEnding +
' begin' + LineEnding +
' if Func(p^, Cur^) then' + LineEnding +
' begin' + LineEnding +
' Cur := p;' + LineEnding +
' Result := i;' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' Inc(p, ElSize);' + LineEnding +
' end;' + LineEnding +
'' + LineEnding +
' Inc(Result, Start);' + LineEnding +
'end;';
implementation
uses
lpparser, lpvartypes_array, lpmessages, lpinternalmethods;
function TLapeTree_InternalMethod_SortWeighted.Compile(var Offset: Integer): TResVar;
var
ArrayVar, ArrayPointerVar, LengthVar, TempVar, WeightsVar: TResVar;
ArrayType: TLapeType;
begin
Result := NullResVar;
Dest := NullResVar;
TempVar := NullResVar;
if (not FParams[0].CompileToTempVar(Offset, ArrayVar)) then
LapeException(lpeInvalidEvaluation, DocPos);
if (not (ArrayVar.VarType is TLapeType_DynArray)) then
LapeException(lpeExpectedArray, DocPos);
ArrayType := TLapeType_DynArray(ArrayVar.VarType).PType;
if (ArrayVar.VarType.BaseType = ltDynArray) then
begin
ArrayPointerVar := ArrayVar;
ArrayPointerVar.VarType := FCompiler.getBaseType(ltPointer);
end else
ArrayPointerVar := ArrayVar.VarType.Eval(op_Addr, TempVar, ArrayVar, NullResVar, [], Offset, @_DocPos); // ltStaticArray
with TLapeTree_InternalMethod_Copy.Create(Self) do
try
addParam(Self.Params[1]);
WeightsVar := Compile(Offset);
finally
Free();
end;
with TLapeTree_InternalMethod_Length.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar, Self));
LengthVar := FoldConstants(False).Compile(Offset);
finally
Free();
end;
// if Length(ArrayVar) > 0 then
// _SortWeighted(A: Pointer; ElSize, Len: SizeInt; Weights: array of Int32; SortUp: EvalBool)
with TLapeTree_If.Create(Self) do
try
Condition := TLapeTree_ResVar.Create(LengthVar.IncLock(), Self);
Body := TLapeTree_Invoke.Create('_SortWeighted', Self);
with TLapeTree_Invoke(Body) do
begin
addParam(TLapeTree_ResVar.Create(ArrayPointerVar.IncLock(), Self));
addParam(TLapeTree_Integer.Create(ArrayType.Size, Self));
addParam(TLapeTree_ResVar.Create(LengthVar.IncLock(), Self));
addParam(TLapeTree_ResVar.Create(WeightsVar.IncLock(), Self));
addParam(Self.Params[1]);
end;
Compile(Offset).Spill(1);
finally
LengthVar.Spill(1);
WeightsVar.Spill(1);
Free();
end;
end;
function TLapeTree_InternalMethod_Sort.Compile(var Offset: Integer): TResVar;
var
ArrayVar, ArrayPointerVar, CompareVar, LengthVar, TempVar: TResVar;
ArrayType, ResultType: TLapeType;
begin
Result := NullResVar;
Dest := NullResVar;
TempVar := NullResVar;
// Check if user defined `_Sort` exists. Useful for providing a native method
if InvokeMagicMethod(Self, '_Sort', Result, Offset) then
Exit;
if (not (FParams.Count in [1..3])) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
if (FParams.Count = 3) then
with TLapeTree_InternalMethod_SortWeighted.Create(Self) do
try
while Self.Params.Count > 0 do
addParam(Self.Params[0]);
Result := Compile(Offset);
Exit;
finally
Free();
end;
if (not FParams[0].CompileToTempVar(Offset, ArrayVar)) then
LapeException(lpeInvalidEvaluation, DocPos);
if (ArrayVar.VarType.BaseType = ltDynArray) then
begin
ArrayPointerVar := ArrayVar;
ArrayPointerVar.VarType := FCompiler.getBaseType(ltPointer);
end else
ArrayPointerVar := ArrayVar.VarType.Eval(op_Addr, TempVar, ArrayVar, NullResVar, [], Offset, @_DocPos); // ltStaticArray
ResultType := FCompiler.getBaseType(ltInt32);
ArrayType := TLapeType_DynArray(ArrayVar.VarType).PType;
if (FParams.Count > 1) then
begin
if (not FParams[1].CompileToTempVar(Offset, CompareVar)) then
LapeException(lpeInvalidEvaluation, DocPos);
if (not (CompareVar.VarType is TLapeType_Method)) then
LapeException(lpeInvalidCompareMethod, DocPos);
with TLapeType_Method(CompareVar.VarType) do
begin
if not (
(Params.Count = 2) and
(ResultType.Equals(Res)) and
(ArrayType.Equals(Params[0].VarType)) and
(ArrayType.Equals(Params[1].VarType)) and
(Params[0].ParType = lptConstRef) and
(Params[1].ParType = lptConstRef)
) then
LapeException(lpeInvalidCompareMethod, DocPos);
end;
CompareVar.VarType := FCompiler.getGlobalType('_LapeCompareFunc');
end else
begin
RequireOperators(FCompiler, [op_cmp_LessThan, op_cmp_GreaterThan], ArrayType, DocPos);
CompareVar := GetMagicMethodOrNil(FCompiler, '_Compare', [ArrayType, ArrayType], ResultType);
end;
with TLapeTree_InternalMethod_Length.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar, Self));
LengthVar := FoldConstants(False).Compile(Offset);
finally
Free();
end;
// if Length(ArrayVar) > 0 then
// _Sort(p: Pointer; ElSize, Len: SizeInt; Compare: function(constref A, B): Int32);
with TLapeTree_If.Create(Self) do
try
Condition := TLapeTree_ResVar.Create(LengthVar.IncLock(), Self);
Body := TLapeTree_Invoke.Create('_Sort', Self);
with TLapeTree_Invoke(Body) do
begin
addParam(TLapeTree_ResVar.Create(ArrayPointerVar.IncLock(), Self));
addParam(TLapeTree_Integer.Create(ArrayType.Size, Self));
addParam(TLapeTree_ResVar.Create(LengthVar.IncLock(), Self));
addParam(TLapeTree_ResVar.Create(CompareVar.IncLock(), Self));
end;
Compile(Offset);
finally
LengthVar.Spill(1);
CompareVar.Spill(1);
Free();
end;
end;
function TLapeTree_InternalMethod_Sorted.resType: TLapeType;
var
ParamType: TLapeType;
begin
if (FResType = nil) and (FParams.Count > 0) and (not isEmpty(FParams[0])) then
begin
ParamType := FParams[0].resType();
if (ParamType <> nil) then
begin
if (ParamType.BaseType in LapeArrayTypes) then
FResType := ParamType;
if (ParamType is TLapeType_StaticArray) then
if (ParamType.BaseType in LapeStringTypes) then
FResType := FCompiler.getBaseType(ltAnsiString)
else with TLapeType_StaticArray(ParamType) do
FResType := FCompiler.addManagedType(TLapeType_DynArray.Create(PType, FCompiler));
end;
end;
Result := inherited;
end;
function TLapeTree_InternalMethod_Sorted.Compile(var Offset: Integer): TResVar;
begin
Result := NullResVar;
Dest := NullResVar;
if (resType() = nil) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
with TLapeTree_InternalMethod_Copy.Create(Self) do
try
addParam(Self.FParams[0]);
Result := Compile(Offset);
Result.isConstant := False;
finally
Free();
end;
with TLapeTree_InternalMethod_Sort.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(Result, Self));
while (Self.FParams.Count > 0) do
addParam(Self.FParams[0]);
Compile(Offset).Spill(1);
finally
Free();
end;
Result.isConstant := True;
Assert((Result.VarPos.MemPos <> mpVar) or (Result.Lock > 0));
end;
function TLapeTree_InternalMethod_Reverse.Compile(var Offset: Integer): TResVar;
var
ArrayVar, ArrayPointer: TResVar;
ArrayHigh: TLapeTree_InternalMethod_High;
ArrayType: TLapeType;
ArrayWasConstant: Boolean;
begin
Result := NullResVar;
Dest := NullResVar;
if (Params.Count <> 1) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
if (not FParams[0].CompileToTempVar(Offset, ArrayVar)) then
LapeException(lpeInvalidEvaluation, DocPos);
ArrayWasConstant := ArrayVar.isConstant;
if ArrayWasConstant then
ArrayVar.isConstant := False;
try
// Check if user defined `_Reverse` exists. Useful for providing a native method
if InvokeMagicMethod(Self, '_Reverse', Result, Offset) then
Exit;
case ArrayVar.VarType.BaseType of
ltStaticArray:
begin
with TLapeTree_Operator.Create(op_Addr, Self) do
try
Left := TLapeTree_Operator.Create(op_Index, Self);
TLapeTree_Operator(Left).Left := TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self);
TLapeTree_Operator(Left).Right := TLapeTree_GlobalVar.Create(ArrayVar.VarType.VarLo(), Self);
ArrayPointer := Compile(Offset);
finally
ArrayVar.DecLock(1);
Free();
end;
end;
ltDynArray:
begin
ArrayPointer := ArrayVar;
ArrayPointer.VarType := FCompiler.getBaseType(ltPointer);
end;
else
LapeException(lpeExpectedArray, DocPos);
end;
ArrayType := TLapeType_DynArray(ArrayVar.VarType).PType;
with TLapeTree_Invoke.Create('_Reverse', Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayPointer.IncLock(), Self));
addParam(TLapeTree_Integer.Create(ArrayType.Size, Self));
case ArrayVar.VarType.BaseType of
ltDynArray:
begin
ArrayHigh := TLapeTree_InternalMethod_High.Create(Self);
ArrayHigh.addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
addParam(ArrayHigh);
end;
ltStaticArray:
addParam(TLapeTree_Integer.Create(TLapeType_StaticArray(ArrayVar.VarType).Range.Hi - TLapeType_StaticArray(ArrayVar.VarType).Range.Lo, Self));
end;
Compile(Offset).Spill(1);
finally
ArrayPointer.DecLock(1);
Free();
end;
finally
ArrayVar.isConstant := ArrayWasConstant;
end;
end;
function TLapeTree_InternalMethod_Reversed.resType: TLapeType;
var
ParamType: TLapeType;
begin
if (FResType = nil) and (FParams.Count = 1) and (not isEmpty(FParams[0])) then
begin
ParamType := FParams[0].resType();
if (ParamType <> nil) then
begin
if (ParamType.BaseType in LapeArrayTypes) then
FResType := ParamType;
if (ParamType is TLapeType_StaticArray) then
if (ParamType.BaseType in LapeStringTypes) then
FResType := FCompiler.getBaseType(ltAnsiString)
else with TLapeType_StaticArray(ParamType) do
FResType := FCompiler.addManagedType(TLapeType_DynArray.Create(PType, FCompiler));
end;
end;
Result := inherited;
end;
function TLapeTree_InternalMethod_Reversed.Compile(var Offset: Integer): TResVar;
begin
Result := NullResVar;
Dest := NullResVar;
if (resType() = nil) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
with TLapeTree_InternalMethod_Copy.Create(Self) do
try
addParam(Self.FParams[0]);
Result := Compile(Offset);
finally
Free();
end;
with TLapeTree_InternalMethod_Reverse.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(Result.IncLock(), Self));
Compile(Offset).Spill(1);
finally
Free();
end;
Assert((Result.VarPos.MemPos <> mpVar) or (Result.Lock > 0));
end;
function TLapeTree_InternalMethod_Unique.resType: TLapeType;
var
ParamType: TLapeType;
begin
if (FResType = nil) and (FParams.Count = 1) and (not isEmpty(FParams[0])) then
begin
ParamType := FParams[0].resType();
if (ParamType <> nil) then
begin
if (ParamType.BaseType in LapeArrayTypes) then
FResType := ParamType;
if (ParamType is TLapeType_StaticArray) then
if (ParamType.BaseType in LapeStringTypes) then
FResType := FCompiler.getBaseType(ltAnsiString)
else with TLapeType_StaticArray(ParamType) do
FResType := FCompiler.addManagedType(TLapeType_DynArray.Create(PType, FCompiler));
end;
end;
Result := inherited;
end;
function TLapeTree_InternalMethod_Unique.Compile(var Offset: Integer): TResVar;
var
ArrayVar: TResVar;
ArrayType: TLapeType;
begin
Result := NullResVar;
Dest := NullResVar;
if (resType() = nil) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
if (not FParams[0].CompileToTempVar(Offset, ArrayVar)) then
LapeException(lpeInvalidEvaluation, DocPos);
// Check if user defined `_Unique` exists. Useful for providing a native method
if InvokeMagicMethod(Self, '_Unique', Result, Offset) then
Exit;
ArrayType := TLapeType_DynArray(ArrayVar.VarType).PType;
with TLapeTree_InternalMethod_Copy.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
Result := Compile(Offset);
Result.isConstant := False;
finally
Free();
end;
ArrayVar := Result;
ArrayVar.VarType := FCompiler.getBaseType(ltPointer);
with TLapeTree_Invoke.Create('_Unique', Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
addParam(TLapeTree_Integer.Create(ArrayType.Size, Self));
addParam(TLapeTree_ResVar.Create(GetMagicMethodOrNil(FCompiler, '_Equals', [ArrayType, ArrayType], FCompiler.getBaseType(ltEvalBool)), Self));
addParam(TLapeTree_ResVar.Create(GetMagicMethodOrNil(FCompiler, '_Dispose', [ArrayType]), Self));
addParam(TLapeTree_ResVar.Create(GetMagicMethodOrNil(FCompiler, '_Assign', [ArrayType]), Self));
Compile(Offset).Spill(1);
finally
Free();
end;
Assert((Result.VarPos.MemPos <> mpVar) or (Result.Lock > 0));
Result.isConstant := True;
end;
function TLapeTree_InternalMethod_ArrayMedian.resType: TLapeType;
var
Typ: TLapeType;
begin
if (FResType = nil) then
if (FParams.Count = 1) and (not isEmpty(FParams[0])) then
begin
Typ := FParams[0].resType();
if (Typ is TLapeType_DynArray) then
begin
if (TLapeType_DynArray(Typ).PType.BaseType in LapeIntegerTypes + LapeRealTypes) then
FResType := FCompiler.getBaseType(ltDouble)
else
FResType := TLapeType_DynArray(Typ).PType;
end;
end;
Result := inherited;
end;
function TLapeTree_InternalMethod_ArrayMedian.Compile(var Offset: Integer): TResVar;
var
LengthVar, ArrayVar, ArraySortedVar, MiddleIndexVar: TResVar;
ArrayType: TLapeType;
begin
Result := NullResVar;
Dest := NullResVar;
if (FParams.Count <> 1) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
ArrayType := resType();
if (ArrayType = nil) or (not FParams[0].CompileToTempVar(Offset, ArrayVar, 1)) then
LapeException(lpeExpectedArray, DocPos);
RequireOperators(FCompiler, [op_cmp_Equal, op_cmp_LessThan, op_cmp_GreaterThan, op_Plus, op_Minus], ArrayType, DocPos);
RequireOperators(FCompiler, [op_Divide], ArrayType, FCompiler.getBaseType(ltDouble), DocPos);
Result := _ResVar.New(FCompiler.getTempVar(resType));
ArraySortedVar := _ResVar.New(FCompiler.getTempVar(ArrayVar.VarType));
MiddleIndexVar := _ResVar.New(FCompiler.getTempVar(ltDouble));
FCompiler.VarToDefault(Result, Offset);
with TLapeTree_InternalMethod_Length.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
LengthVar := FoldConstants(False).Compile(Offset);
finally
Free();
end;
// if Length(ArrayVar) > 0 then
with TLapeTree_If.Create(Self) do
try
Condition := TLapeTree_ResVar.Create(LengthVar.IncLock(), Self);
Body := TLapeTree_StatementList.Create(Self);
with TLapeTree_StatementList(Body) do
begin
// SortedArrayVar := Sorted(ArrayVar)
addStatement(TLapeTree_Operator.Create(op_Assign, Self));
with TLapeTree_Operator(Statements[0]) do
begin
Left := TLapeTree_ResVar.Create(ArraySortedVar.IncLock(), Self);
Right := TLapeTree_InternalMethod_Sorted.Create(Self);
with TLapeTree_InternalMethod_Sorted(Right) do
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
end;
// MiddleIndexVar := (LengthVar - 1) / 2
addStatement(TLapeTree_Operator.Create(op_Assign, Self));
with TLapeTree_Operator(Statements[1]) do
begin
Left := TLapeTree_ResVar.Create(MiddleIndexVar.IncLock(), Self);
Right := TLapeTree_Operator.Create(op_Divide, Self);
with TLapeTree_Operator(Right) do
begin
Left := TLapeTree_Operator.Create(op_Minus, Self);
with TLapeTree_Operator(Left) do
begin
Left := TLapeTree_ResVar.Create(LengthVar.IncLock(), Self);
Right := TLapeTree_Integer.Create(1, Self);
end;
Right := TLapeTree_Integer.Create(2, Self);
end;
end;
// Result := (SortedArrayVar[Trunc(MiddleIndexVar)] + SortedArrayVar[Ceil(High(MiddleIndexVar)]) / 2
addStatement(TLapeTree_Operator.Create(op_Assign, Self));
with TLapeTree_Operator(Statements[2]) do
begin
Left := TLapeTree_ResVar.Create(Result.IncLock(), Self);
Right := TLapeTree_Operator.Create(op_Divide, Self);
TLapeTree_Operator(Right).Left := TLapeTree_Operator.Create(op_Plus, Self);
with TLapeTree_Operator(TLapeTree_Operator(Right).Left) do
begin
Left := TLapeTree_Operator.Create(op_Index, Self);
with TLapeTree_Operator(Left) do
begin
Left := TLapeTree_ResVar.Create(ArraySortedVar.IncLock(), Self);
Right := TLapeTree_Invoke.Create('Trunc', Self);
with TLapeTree_Invoke(Right) do
TLapeTree_Invoke(Right).addParam(TLapeTree_ResVar.Create(MiddleIndexVar.IncLock(), Self));
end;
Right := TLapeTree_Operator.Create(op_Index, Self);
with TLapeTree_Operator(Right) do
begin
Left := TLapeTree_ResVar.Create(ArraySortedVar.IncLock(), Self);
Right := TLapeTree_Invoke.Create('Ceil', Self);
with TLapeTree_Invoke(Right) do
TLapeTree_Invoke(Right).addParam(TLapeTree_ResVar.Create(MiddleIndexVar.IncLock(), Self));
end;
end;
TLapeTree_Operator(Right).Right := TLapeTree_Integer.Create(2, Self);
end;
end;
Compile(Offset);
finally
ArraySortedVar.Spill(2);
LengthVar.Spill(1);
Free();
end;
Assert((Result.VarPos.MemPos <> mpVar) or (Result.Lock > 0));
Result.isConstant := True;
end;
function TLapeTree_InternalMethod_ArrayMode.resType: TLapeType;
var
Typ: TLapeType;
begin
if (FResType = nil) then
if (FParams.Count = 1) and (not isEmpty(FParams[0])) then
begin
Typ := FParams[0].resType();
if (Typ is TLapeType_DynArray) then
FResType := TLapeType_DynArray(Typ).PType;
end;
Result := inherited;
end;
function TLapeTree_InternalMethod_ArrayMode.Compile(var Offset: Integer): TResVar;
var
ArrayVar, SortedArrayVar, LengthVar: TResVar;
ArrayType: TLapeType;
begin
Result := NullResVar;
Dest := NullResVar;
if (FParams.Count <> 1) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
ArrayType := resType();
if (ArrayType = nil) or (not FParams[0].CompileToTempVar(Offset, ArrayVar, 1)) then
LapeException(lpeExpectedArray, DocPos);
RequireOperators(FCompiler, [op_cmp_Equal, op_cmp_LessThan, op_cmp_GreaterThan], ArrayType, DocPos);
Result := _ResVar.New(FCompiler.getTempVar(ArrayType));
SortedArrayVar := _ResVar.New(FCompiler.getTempVar(ArrayVar.VarType));
FCompiler.VarToDefault(Result, Offset);
with TLapeTree_InternalMethod_Length.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
LengthVar := FoldConstants(False).Compile(Offset);
finally
Free();
end;
// // if Length(ArrayVar) > 0 then
with TLapeTree_If.Create(Self) do
try
Condition := TLapeTree_ResVar.Create(LengthVar.IncLock(), Self);
Body := TLapeTree_StatementList.Create(Self);
with TLapeTree_StatementList(Body) do
begin
// SortedArrayVar := Sorted(ArrayVar)
addStatement(TLapeTree_Operator.Create(op_Assign, Self));
with TLapeTree_Operator(Statements[0]) do
begin
Left := TLapeTree_ResVar.Create(SortedArrayVar.IncLock(), Self);
Right := TLapeTree_InternalMethod_Sorted.Create(Self);
with TLapeTree_InternalMethod_Sorted(Right) do
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
end;
// Result := SortedArrayVar[_ArrayMode(...)]
addStatement(TLapeTree_Operator.Create(op_Assign, Self));
with TLapeTree_Operator(Statements[1]) do
begin
Left := TLapeTree_ResVar.Create(Result.IncLock(), Self);
Right := TLapeTree_Operator.Create(op_Index, Self);
with TLapeTree_Operator(Right) do
begin
Left := TLapeTree_ResVar.Create(SortedArrayVar.IncLock(), Self);
Right := TLapeTree_Invoke.Create('_ArrayMode', Self);
with TLapeTree_Invoke(Right) do
begin
SortedArrayVar.VarType := FCompiler.getBaseType(ltPointer);
addParam(TLapeTree_ResVar.Create(SortedArrayVar.IncLock(), Self));
addParam(TLapeTree_Integer.Create(ArrayType.Size, Self));
addParam(TLapeTree_ResVar.Create(LengthVar.IncLock(), Self));
addParam(TLapeTree_ResVar.Create(GetMagicMethodOrNil(FCompiler, '_Equals', [ArrayType, ArrayType], FCompiler.getBaseType(ltEvalBool)), Self));
end;
end;
end;
end;
Compile(Offset);
finally
LengthVar.Spill(1);
SortedArrayVar.Spill(1);
Free();
end;
Assert((Result.VarPos.MemPos <> mpVar) or (Result.Lock > 0));
Result.isConstant := True;
end;
function TLapeTree_InternalMethod_ArrayMin.resType: TLapeType;
var
Typ: TLapeType;
begin
if (FResType = nil) then
if (FParams.Count = 1) and (not isEmpty(FParams[0])) then
begin
Typ := FParams[0].resType();
if (Typ is TLapeType_DynArray) then
FResType := TLapeType_DynArray(Typ).PType;
end;
Result := inherited;
end;
function TLapeTree_InternalMethod_ArrayMin.Compile(var Offset: Integer): TResVar;
var
ArrayVar, ArrayPointerVar, LengthVar, TempVar: TResVar;
ArrayType: TLapeType;
begin
Result := NullResVar;
Dest := NullResVar;
TempVar := NullResVar;
if (FParams.Count <> 1) then
LapeExceptionFmt(lpeWrongNumberParams, [1], DocPos);
ArrayType := resType();
if (ArrayType = nil) or (not FParams[0].CompileToTempVar(Offset, ArrayVar, 1)) then
LapeException(lpeExpectedArray, DocPos);
// Check if user defined `_ArrayMin` exists. Useful for providing a native method
if InvokeMagicMethod(Self, '_ArrayMin', Result, Offset) then
Exit;
RequireOperators(FCompiler, [op_cmp_LessThan], ArrayType, DocPos);
if (ArrayVar.VarType.BaseType = ltDynArray) then
begin
ArrayPointerVar := ArrayVar;
ArrayPointerVar.VarType := FCompiler.getBaseType(ltPointer);
end else
ArrayPointerVar := ArrayVar.VarType.Eval(op_Addr, TempVar, ArrayVar, NullResVar, [], Offset, @_DocPos); // ltStaticArray
Result := _ResVar.New(FCompiler.getTempVar(ArrayType));
FCompiler.VarToDefault(Result, Offset);
with TLapeTree_InternalMethod_Length.Create(Self) do
try
addParam(TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self));
LengthVar := FoldConstants(False).Compile(Offset);
finally
Free();
end;
// if Length(ArrayVar) > 0 then
// Result := ArrayVar[_ArrayMinMax(...)]
with TLapeTree_If.Create(Self) do
try
Condition := TLapeTree_ResVar.Create(LengthVar.IncLock(), Self);
Body := TLapeTree_Operator.Create(op_Assign, Self);
with TLapeTree_Operator(Body) do
begin
Left := TLapeTree_ResVar.Create(Result.IncLock(), Self);
Right := TLapeTree_Operator.Create(op_Index, Self);
with TLapeTree_Operator(Right) do
begin
Left := TLapeTree_ResVar.Create(ArrayVar.IncLock(), Self);
Right := TLapeTree_Invoke.Create('_ArrayMinMax', Self);
with TLapeTree_Invoke(Right) do
begin
addParam(TLapeTree_ResVar.Create(ArrayPointerVar.IncLock(), Self));
addParam(TLapeTree_Integer.Create(ArrayType.Size, Self));
addParam(TLapeTree_GlobalVar.Create(ArrayVar.VarType.VarLo(), Self));
addParam(TLapeTree_ResVar.Create(LengthVar.IncLock(), Self));
addParam(TLapeTree_ResVar.Create(GetMagicMethodOrNil(FCompiler, '_LessThan', [ArrayType, ArrayType], FCompiler.getBaseType(ltEvalBool)), Self));
end;
end;
end;
Compile(Offset);
finally
if (ArrayVar.VarType.BaseType = ltStaticArray)then
ArrayPointerVar.Spill(1);
LengthVar.Spill(1);
Free();
end;
Assert((Result.VarPos.MemPos <> mpVar) or (Result.Lock > 0));
Result.isConstant := True;
end;