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fix bug with string offset

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Folkert 2022-07-26 20:29:38 +02:00
parent 1017bbc5ec
commit eb9ebc8c33
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1 changed files with 8 additions and 3 deletions
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11
crates/repl_expect/src/lib.rs
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@ -109,7 +109,9 @@ impl ReplAppMemory for ExpectMemory {
deref_number!(deref_f64, f64);
fn deref_str(&self, addr: usize) -> &str {
let last_byte_addr = addr + (3 * std::mem::size_of::<usize>()) - 1;
const WIDTH: usize = 3 * std::mem::size_of::<usize>();
let last_byte_addr = addr + WIDTH - 1;
let last_byte = self.deref_i8(last_byte_addr);
let is_small = last_byte < 0;
@ -118,13 +120,16 @@ impl ReplAppMemory for ExpectMemory {
let ptr = unsafe { self.start.add(addr) };
let roc_str: &RocStr = unsafe { &*ptr.cast() };
*self.bytes_read.borrow_mut() += WIDTH - 1;
roc_str.as_str()
} else {
let offset = self.deref_usize(addr);
let length = self.deref_usize(addr + std::mem::size_of::<usize>());
let _capacity = self.deref_usize(addr + 2 * std::mem::size_of::<usize>());
// we don't store extra capacity
// let capacity = self.deref_usize(addr + 2 * std::mem::size_of::<usize>());
// subtract the last byte, which we've now read twice
*self.bytes_read.borrow_mut() -= 1;
unsafe {
let ptr = self.start.add(offset);