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Add bitwise operations, rename power operator to "**"

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This commit is contained in:
Dominic Höglinger 2026-04-25 12:14:28 +02:00
parent af4239e198
commit 3ae964e033
2 changed files with 9 additions and 6 deletions
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7
Parser/XnParser.cs
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@ -30,7 +30,10 @@ namespace XNeedle.Parser
static readonly Parser<ExpressionType> Multiply = Operator("*", ExpressionType.MultiplyChecked); static readonly Parser<ExpressionType> Multiply = Operator("*", ExpressionType.MultiplyChecked);
static readonly Parser<ExpressionType> Divide = Operator("/", ExpressionType.Divide); static readonly Parser<ExpressionType> Divide = Operator("/", ExpressionType.Divide);
static readonly Parser<ExpressionType> Modulo = Operator("%", ExpressionType.Modulo); static readonly Parser<ExpressionType> Modulo = Operator("%", ExpressionType.Modulo);
static readonly Parser<ExpressionType> Power = Operator("^", ExpressionType.Power); static readonly Parser<ExpressionType> Power = Operator("**", ExpressionType.Power);
static readonly Parser<ExpressionType> BitwiseXor = Operator("^", ExpressionType.ExclusiveOr);
static readonly Parser<ExpressionType> BitwiseAnd = Operator("&", ExpressionType.And);
static readonly Parser<ExpressionType> BitwiseOr = Operator("|", ExpressionType.Or);
static Parser<Expression> Function(Context ctx) static Parser<Expression> Function(Context ctx)
{ {
@ -116,7 +119,7 @@ namespace XNeedle.Parser
static Parser<Expression> Term(Context ctx) static Parser<Expression> Term(Context ctx)
{ {
return Parse.ChainOperator(Multiply.Or(Divide).Or(Modulo), InnerTerm(ctx), Expression.MakeBinary); return Parse.ChainOperator(Multiply.Or(Divide).Or(Modulo).Or(BitwiseXor).Or(BitwiseAnd).Or(BitwiseOr), InnerTerm(ctx), Expression.MakeBinary);
} }
static Parser<Expression> ConcatExpr(Context ctx) static Parser<Expression> ConcatExpr(Context ctx)

6
Transformation/ContextFunctions.cs
View File

@ -12,7 +12,7 @@ namespace XNeedle.Transformation
{ {
public class ContextFunctions public class ContextFunctions
{ {
public static string hexlit(Context ctx, double value) public static string hexlit(Context ctx, int value)
{ {
uint v = (uint)value; uint v = (uint)value;
return $"#x{v:x8}"; return $"#x{v:x8}";
@ -70,7 +70,7 @@ namespace XNeedle.Transformation
return reflected; return reflected;
} }
public static double crc32(Context ctx, int poly = 0x04C11DB7, int init = 0, int xorOut = 0, bool reflected = false) public static int crc32(Context ctx, int poly = 0x04C11DB7, int init = 0, int xorOut = 0, bool reflected = false)
{ {
if (ctx.Node is null) if (ctx.Node is null)
return 0; return 0;
@ -88,7 +88,7 @@ namespace XNeedle.Transformation
byte[] fragBytes = Encoding.UTF8.GetBytes(data); byte[] fragBytes = Encoding.UTF8.GetBytes(data);
// Step 3: Digest into CRC32 using parameterized CRC32 - by default MPEG-2 // Step 3: Digest into CRC32 using parameterized CRC32 - by default MPEG-2
return (double)ComputeCrc32(fragBytes, (uint)poly, (uint)init, (uint)xorOut, reflected); return (int)ComputeCrc32(fragBytes, (uint)poly, (uint)init, (uint)xorOut, reflected);
} }
public static string text(Context ctx) public static string text(Context ctx)