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String indexing bound check now includes the terminating 0 character. Also fix negative indexes on strings.

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fixes #190
This commit is contained in:
Irmen de Jong
2025-11-07 23:20:44 +01:00
parent 6611e4e092
commit 833e463525
6 changed files with 99 additions and 29 deletions
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compiler/test/codegeneration/TestArrayThings.kt
+15 -21
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@@ -251,32 +251,26 @@ main {
val src="""
main {
sub start() {
ubyte[10] array
array[-11] = 0
}
}"""
val errors = ErrorReporterForTests()
compileText(VMTarget(), false, src, outputDir, writeAssembly = false, errors = errors) shouldBe null
errors.errors.size shouldBe 1
errors.errors[0] shouldContain "out of bounds"
}
ubyte[] array = ['h', 'e', 'l', 'l', 'o', 0]
str name = "hello"
test("bounds checking on strings invalid cases") {
val src="""
main {
sub start() {
str name = "1234567890"
name[10] = 0
name[-1] = 0
name[-11] = 0
name[-5] = 99 ; ok
name[-6] = 99 ; out of bounds
cx16.r1L = name[-5] ; ok
cx16.r1L = name[-6] ; out of bounds
array[-6] = 99 ; ok
array[-7] = 99 ; out of bounds
cx16.r1L = array[-6] ; ok
cx16.r1L = array[-7] ; out of bounds
}
}"""
val errors = ErrorReporterForTests()
compileText(VMTarget(), false, src, outputDir, writeAssembly = false, errors = errors) shouldBe null
errors.errors.size shouldBe 3
errors.errors[0] shouldContain "out of bounds"
errors.errors[1] shouldContain "out of bounds"
errors.errors[2] shouldContain "out of bounds"
errors.errors.size shouldBe 4
errors.errors[0] shouldContain ":8:9: index out of bounds"
errors.errors[1] shouldContain ":10:20: index out of bounds"
errors.errors[2] shouldContain ":12:9: index out of bounds"
errors.errors[3] shouldContain ":14:20: index out of bounds"
}
test("array and string initializer with multiplication") {