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https://github.com/irmen/prog8.git
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added sizeof() function
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Irmen de Jong
parent
774897260e
commit
edfd9d55ba
@ -58,7 +58,7 @@ enum class DataType {
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in ByteDatatypes -> 1
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in WordDatatypes -> 2
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FLOAT -> CompilationTarget.machine.FLOAT_MEM_SIZE
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in PassByReferenceDatatypes -> 2
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in PassByReferenceDatatypes -> CompilationTarget.machine.POINTER_MEM_SIZE
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else -> -9999999
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}
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}
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@ -716,11 +716,10 @@ data class IdentifierReference(val nameInSource: List<String>, override val posi
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override fun referencesIdentifiers(vararg name: String): Boolean = nameInSource.last() in name
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override fun inferType(program: Program): InferredTypes.InferredType {
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val targetStmt = targetStatement(program.namespace)
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return if(targetStmt is VarDecl) {
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InferredTypes.knownFor(targetStmt.datatype)
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} else {
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InferredTypes.InferredType.unknown()
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return when (val targetStmt = targetStatement(program.namespace)) {
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is VarDecl -> InferredTypes.knownFor(targetStmt.datatype)
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is StructDecl -> InferredTypes.knownFor(DataType.STRUCT)
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else -> InferredTypes.InferredType.unknown()
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}
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}
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@ -8,6 +8,7 @@ interface IMachineDefinition {
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val FLOAT_MAX_NEGATIVE: Double
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val FLOAT_MAX_POSITIVE: Double
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val FLOAT_MEM_SIZE: Int
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val POINTER_MEM_SIZE: Int
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val opcodeNames: Set<String>
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@ -14,6 +14,7 @@ object C64MachineDefinition: IMachineDefinition {
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override val FLOAT_MAX_POSITIVE = 1.7014118345e+38 // bytes: 255,127,255,255,255
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override val FLOAT_MAX_NEGATIVE = -1.7014118345e+38 // bytes: 255,255,255,255,255
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override val FLOAT_MEM_SIZE = 5
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override val POINTER_MEM_SIZE = 2
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const val BASIC_LOAD_ADDRESS = 0x0801
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const val RAW_LOAD_ADDRESS = 0xc000
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@ -3,6 +3,8 @@ package prog8.functions
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import prog8.ast.Program
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import prog8.ast.base.*
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import prog8.ast.expressions.*
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import prog8.ast.statements.StructDecl
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import prog8.ast.statements.VarDecl
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import prog8.compiler.CompilerException
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import kotlin.math.*
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@ -35,6 +37,7 @@ val BuiltinFunctions = mapOf(
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"sum" to FSignature(true, listOf(FParam("values", ArrayDatatypes)), null) { a, p, prg -> collectionArg(a, p, prg, ::builtinSum) }, // type depends on args
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"abs" to FSignature(true, listOf(FParam("value", NumericDatatypes)), null, ::builtinAbs), // type depends on argument
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"len" to FSignature(true, listOf(FParam("values", IterableDatatypes)), null, ::builtinLen), // type is UBYTE or UWORD depending on actual length
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"sizeof" to FSignature(true, listOf(FParam("object", DataType.values().toSet())), DataType.UBYTE, ::builtinSizeof),
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// normal functions follow:
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"sgn" to FSignature(true, listOf(FParam("value", NumericDatatypes)), DataType.BYTE, ::builtinSgn ),
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"sin" to FSignature(true, listOf(FParam("rads", setOf(DataType.FLOAT))), DataType.FLOAT) { a, p, prg -> oneDoubleArg(a, p, prg, Math::sin) },
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@ -240,6 +243,42 @@ private fun builtinAbs(args: List<Expression>, position: Position, program: Prog
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}
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}
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private fun builtinSizeof(args: List<Expression>, position: Position, program: Program): NumericLiteralValue {
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// 1 arg, type = anything, result type = ubyte
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if(args.size!=1)
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throw SyntaxError("sizeof requires one argument", position)
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if(args[0] !is IdentifierReference)
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throw SyntaxError("sizeof argument should be an identifier", position)
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val dt = args[0].inferType(program)
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if(dt.isKnown) {
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val target = (args[0] as IdentifierReference).targetStatement(program.namespace)
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?: throw CannotEvaluateException("sizeof", "no target")
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fun structSize(target: StructDecl) =
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NumericLiteralValue(DataType.UBYTE, target.statements.map { (it as VarDecl).datatype.memorySize() }.sum(), position)
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return when {
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dt.typeOrElse(DataType.STRUCT) in ArrayDatatypes -> {
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val length = (target as VarDecl).arraysize!!.size() ?: throw CannotEvaluateException("sizeof", "unknown array size")
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val elementDt = ArrayElementTypes.getValue(dt.typeOrElse(DataType.STRUCT))
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numericLiteral(elementDt.memorySize() * length, position)
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}
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dt.istype(DataType.STRUCT) -> {
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when (target) {
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is VarDecl -> structSize(target.struct!!)
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is StructDecl -> structSize(target)
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else -> throw CompilerException("weird struct type $target")
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}
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}
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dt.istype(DataType.STR) -> throw SyntaxError("sizeof str is undefined, did you mean len?", position)
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else -> NumericLiteralValue(DataType.UBYTE, dt.typeOrElse(DataType.STRUCT).memorySize(), position)
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}
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} else {
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throw SyntaxError("sizeof invalid argument type", position)
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}
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}
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private fun builtinStrlen(args: List<Expression>, position: Position, program: Program): NumericLiteralValue {
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if (args.size != 1)
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throw SyntaxError("strlen requires one argument", position)
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@ -262,18 +301,12 @@ private fun builtinLen(args: List<Expression>, position: Position, program: Prog
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if(args[0] is ArrayLiteralValue)
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return NumericLiteralValue.optimalInteger((args[0] as ArrayLiteralValue).value.size, position)
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if(args[0] !is IdentifierReference)
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throw SyntaxError("len argument should be an identifier, but is ${args[0]}", position)
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throw SyntaxError("len argument should be an identifier", position)
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val target = (args[0] as IdentifierReference).targetVarDecl(program.namespace)
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?: throw CannotEvaluateException("len", "no target vardecl")
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return when(target.datatype) {
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DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W -> {
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arraySize = target.arraysize?.size()
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if(arraySize==null)
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throw CannotEvaluateException("len", "arraysize unknown")
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NumericLiteralValue.optimalInteger(arraySize, args[0].position)
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}
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DataType.ARRAY_F -> {
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DataType.ARRAY_UB, DataType.ARRAY_B, DataType.ARRAY_UW, DataType.ARRAY_W, DataType.ARRAY_F -> {
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arraySize = target.arraysize?.size()
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if(arraySize==null)
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throw CannotEvaluateException("len", "arraysize unknown")
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@ -724,11 +724,17 @@ reverse(array)
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len(x)
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Number of values in the array value x, or the number of characters in a string (excluding the size or 0-byte).
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Note: this can be different from the number of *bytes* in memory if the datatype isn't a byte.
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Note: this can be different from the number of *bytes* in memory if the datatype isn't a byte. See sizeof().
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Note: lengths of strings and arrays are determined at compile-time! If your program modifies the actual
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length of the string during execution, the value of len(string) may no longer be correct!
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(use strlen function if you want to dynamically determine the length)
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sizeof(name)
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Number of bytes that the object 'name' occupies in memory. This is a constant determined by the data type of
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the object. For instance, for a variable of type uword, the sizeof is 2.
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For an 10 element array of floats, it is 50 (on the C-64, where a float is 5 bytes).
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Note: usually you will be interested in the number of elements in an array, use len() for that.
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strlen(str)
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Number of bytes in the string. This value is determined during runtime and counts upto
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the first terminating 0 byte in the string, regardless of the size of the string during compilation time.
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@ -15,44 +15,45 @@ main {
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Color c = [11,22222,3.1234]
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; c64scr.print_ub(c.red)
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; c64.CHROUT('\n')
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; c64scr.print_uw(c.green)
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; c64.CHROUT('\n')
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; c64flt.print_f(c.blue)
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; c64.CHROUT('\n')
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str string = "irmen"
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byte[] ab = [1,2,3]
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ubyte[] aub = [1,2,3]
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word[] aw = [11,22,33]
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uword[] auw = [11,22,33]
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float[] af = [1.1,2.2,3.3]
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uword xx = 4.5678
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ubyte bb = 33
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float ff = 1.234
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c64scr.print_ub(sizeof(ab))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(aub))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(aw))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(auw))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(af))
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c64.CHROUT('\n')
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c64.CHROUT('\n')
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c64.CHROUT('\n')
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foo(1.234, 4.456) ; TODO truncation warning
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foo2(2.3456) ; TODO truncation warning
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foo2(bb)
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foo2(4.55) ; TODO truncation warning
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c64scr.print_ub(c.red)
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c64.CHROUT('\n')
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c64scr.print_uw(c.green)
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c64.CHROUT('\n')
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c64flt.print_f(c.blue)
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c64.CHROUT('\n')
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;foo("zzz", 8.777)
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;len(13)
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; uword size = len(Color)
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; c64scr.print_uw(size)
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; c64.CHROUT('\n')
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; c64scr.print_ub(len(Color))
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; c64.CHROUT('\n')
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; c64scr.print_ub(len(c))
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; c64.CHROUT('\n')
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; c64scr.print_ub(len(c.green))
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; c64.CHROUT('\n')
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}
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sub foo(ubyte aa, word ww) {
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ww += aa
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}
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asmsub foo2(ubyte aa @Pc) {
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%asm {{
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rts
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}}
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ubyte size = sizeof(Color)
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c64scr.print_ub(size)
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(Color))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(c))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(c.red))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(c.green))
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c64.CHROUT('\n')
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c64scr.print_ub(sizeof(c.blue))
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c64.CHROUT('\n')
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}
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}
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