zydis/assets/InstructionEditor/untHelperClasses.pas

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unit untHelperClasses;
interface
uses
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System.Classes, System.Generics.Collections, System.Generics.Defaults, SynCrossPlatformJSON;
type
TSizeFormatter = record
public
class function Format(Size: UInt64): String; static;
end;
TStringHelper = record
public
{**
* Fast alternative to the @c System.StrUtils.IndexStr function
*
* @param S The string to search for.
* @param Values The array of strings to search in.
*
* @return The index of @c S in the @c Values array or -1, if not found.
*}
class function IndexStr(const S: String; const Values: array of String): Integer; static;
{**
* Fast alternative to the @c System.SysUtils.AnsiLowerCase function
*
* @param S A reference to the target string.
*}
class procedure AnsiLowerCase(var S: String); static;
end;
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TListHelper<T> = record
public
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class procedure BubbleSort(var List: TList<T>; const Comparer: IComparer<T>); static;
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end;
TJSONHelper = record
public
class function JSONToString(JSON: PJSONVariantData; const Ident: String = ''): String; static;
end;
TStringBuffer = class(TObject)
strict private
FBuffer: array of Char;
FPosition: Integer;
FCapacity: Integer;
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FChunkSize: Cardinal;
strict private
function GetValue: String; inline;
public
procedure Append(const S: String);
procedure AppendLn(const S: String);
public
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constructor Create(ChunkSize: Cardinal = 1024 * 16);
public
property Value: String read GetValue;
end;
implementation
uses
System.SysUtils, System.Variants;
{ TSizeFormatter }
class function TSizeFormatter.Format(Size: UInt64): String;
const
SZ_KB = 1024;
SZ_MB = 1024 * 1024;
SZ_GB = 1024 * 1024;
var
Format: TFormatSettings;
begin
Format := System.SysUtils.FormatSettings;
Format.DecimalSeparator := '.';
if (Size >= SZ_GB) then
begin
Result := FormatFloat('0.00 GiB', Size / SZ_GB, Format);
end else if (Size >= SZ_MB) then
begin
Result := FormatFloat('0.00 MiB', Size / SZ_MB, Format);
end else if (Size >= SZ_KB) then
begin
Result := FormatFloat('0.00 KiB', Size / SZ_KB, Format);
end else
begin
Result := FormatFloat('0.00 Byte', Size, Format);
end;
end;
{ TStringHelper }
class function TStringHelper.IndexStr(const S: String; const Values: array of String): Integer;
var
L, I, J: Integer;
B: Boolean;
begin
Result := -1;
L := Length(S);
for I := Low(Values) to High(Values) do
begin
if (L <> Length(Values[I])) then Continue;
B := true;
for J := 1 to Length(S) do
begin
if (S[J] <> Values[I][J]) then
begin
B := false;
Continue;
end;
end;
if (B) then
begin
Result := I;
Break;
end;
end;
end;
class procedure TStringHelper.AnsiLowerCase(var S: String);
const
Lower: array of Char =
['a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's',
't', 'u', 'v', 'w', 'x', 'y', 'z'];
var
I: Integer;
begin
for I := 1 to Length(S) do
begin
if (CharInSet(S[I], ['A'..'Z'])) then
begin
S[I] := Lower[Ord(S[I]) - Ord('A')];
end;
end;
end;
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{ TListHelper<T> }
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class procedure TListHelper<T>.BubbleSort(var List: TList<T>; const Comparer: IComparer<T>);
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var
I: Integer;
Done: Boolean;
begin
repeat
Done := true;
for I := 0 to List.Count - 2 do
begin
if (Comparer.Compare(List[I], List[I + 1]) > 0) then
begin
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List.Exchange(I, I + 1);
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Done := false;
end;
end;
until Done;
end;
{ TJSONHelper }
class function TJSONHelper.JSONToString(JSON: PJSONVariantData; const Ident: String = ''): String;
// TODO: This helper function needs refactoring
procedure JSONToString(Buffer: TStringBuffer; JSON: PJSONVariantData; const Ident: String = '');
procedure ValueToJSON(Buffer: TStringBuffer; const Value: Variant);
var
I64: Int64;
B: Boolean;
S: String;
begin
if (TVarData(Value).VType = JSONVariantType.VarType) then
begin
JSONToString(Buffer, @TJSONVariantData(Value), Ident + ' ');
end else if (TVarData(Value).VType = varByRef or varVariant) then
begin
ValueToJSON(Buffer, PVariant(TVarData(Value).VPointer)^)
end else if (TVarData(Value).VType <= varNull) then
begin
Buffer.Append('null');
end else if (TVarData(Value).VType = varBoolean) then
begin
B := Value;
Buffer.Append(LowerCase(BoolToStr(B, true)));
end else if (VarIsOrdinal(Value)) then
begin
I64 := Value;
Buffer.Append(IntToStr(I64));
end else if (TVarData(Value).VType = varDate) then
begin
Buffer.Append(DateTimeToJSON(TVarData(Value).VDouble));
end else if (VarIsFloat(Value)) then
begin
DoubleToJSON(Value, S);
Buffer.Append(S);
end else if (VarIsStr(Value)) then
begin
Buffer.Append(StringToJSON(Value));
end else
begin
Buffer.Append(Value);
end;
end;
var
I: Integer;
begin
case JSON.Kind of
jvObject:
begin
Buffer.AppendLn('{');
for I := 0 to JSON.Count - 1 do
begin
Buffer.Append(Ident);
Buffer.Append(' ');
Buffer.Append(StringToJSON(JSON.Names[I]) + ': ');
ValueToJSON(Buffer, JSON.Values[I]);
if (I = JSON.Count - 1) then
begin
Buffer.AppendLn('');
end else
begin
Buffer.AppendLn(',');
end;
end;
Buffer.Append(Ident);
Buffer.Append('}');
end;
jvArray:
begin
Buffer.AppendLn('[');
for I := 0 to JSON.Count - 1 do
begin
Buffer.Append(Ident);
Buffer.Append(' ');
ValueToJSON(Buffer, JSON.Values[I]);
if (I = JSON.Count - 1) then
begin
Buffer.AppendLn('');
end else
begin
Buffer.AppendLn(',');
end;
end;
Buffer.Append(Ident);
Buffer.Append(']');
end else
begin
Buffer.Append('null');
end;
end;
end;
var
Buffer: TStringBuffer;
begin
Buffer := TStringBuffer.Create;
try
JSONToString(Buffer, JSON, Ident);
Result := Buffer.Value;
finally
Buffer.Free;
end;
end;
{ TStringBuffer }
procedure TStringBuffer.Append(const S: String);
var
L: Integer;
begin
L := Length(S);
while (FPosition + L > FCapacity) do
begin
Inc(FCapacity, FChunkSize);
SetLength(FBuffer, FCapacity);
end;
Move(S[1], FBuffer[FPosition], L * SizeOf(FBuffer[0]));
Inc(FPosition, L);
end;
procedure TStringBuffer.AppendLn(const S: String);
begin
Append(S);
Append(sLineBreak);
end;
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constructor TStringBuffer.Create(ChunkSize: Cardinal);
begin
inherited Create;
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FChunkSize := ChunkSize;
FCapacity := FChunkSize;
SetLength(FBuffer, FChunkSize);
end;
function TStringBuffer.GetValue: String;
begin
SetLength(Result, FPosition);
Move(FBuffer[0], Result[1], FPosition * SizeOf(FBuffer[0]));
end;
end.