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fixed strlen() to work on arguments other than just a variable

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This commit is contained in:
Irmen de Jong 2020-12-11 23:32:29 +01:00
parent add5bfa2ec
commit 43c0afdea0
2 changed files with 15 additions and 8 deletions
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21
compiler/src/prog8/compiler/target/c64/codegen/BuiltinFunctionsAsmGen.kt
View File

@ -540,14 +540,21 @@ internal class BuiltinFunctionsAsmGen(private val program: Program, private val
}
private fun funcStrlen(fcall: IFunctionCall, resultToStack: Boolean) {
val name = asmgen.asmVariableName(fcall.args[0] as IdentifierReference)
val type = fcall.args[0].inferType(program)
when {
type.istype(DataType.STR) -> asmgen.out(" lda #<$name | ldy #>$name")
type.istype(DataType.UWORD) -> asmgen.out(" lda $name | ldy $name+1")
else -> throw AssemblyError("strlen requires str or uword arg")
if (fcall.args[0] is IdentifierReference) {
// use the address of the variable
val name = asmgen.asmVariableName(fcall.args[0] as IdentifierReference)
val type = fcall.args[0].inferType(program)
when {
type.istype(DataType.STR) -> asmgen.out(" lda #<$name | ldy #>$name")
type.istype(DataType.UWORD) -> asmgen.out(" lda $name | ldy $name+1")
else -> throw AssemblyError("strlen requires str or uword arg")
}
}
if(resultToStack)
else {
// use the expression value as address of the string
asmgen.assignExpressionToRegister(fcall.args[0], RegisterOrPair.AY)
}
if (resultToStack)
asmgen.out(" jsr prog8_lib.func_strlen_stack")
else
asmgen.out(" jsr prog8_lib.func_strlen_into_A")

2
compiler/src/prog8/functions/BuiltinFunctions.kt
View File

@ -354,7 +354,7 @@ private fun builtinStrlen(args: List<Expression>, position: Position, program: P
val argument=args[0]
if(argument is StringLiteralValue)
return NumericLiteralValue.optimalInteger(argument.value.length, argument.position)
val vardecl = (argument as IdentifierReference).targetVarDecl(program.namespace)
val vardecl = (argument as? IdentifierReference)?.targetVarDecl(program.namespace)
if(vardecl!=null) {
if(vardecl.datatype!=DataType.STR && vardecl.datatype!=DataType.UWORD)
throw SyntaxError("strlen must have string argument", position)