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Fix get_int if nbytes is zero (#806)

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This commit is contained in:
Paolo Barbolini
2025-11-21 11:14:40 +01:00
committed by GitHub
parent a7952fb447
commit acd1e0ffb8
2 changed files with 25 additions and 9 deletions
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src/buf/buf_impl.rs
+7 -2
View File
@@ -86,8 +86,13 @@ macro_rules! buf_get_impl {
// https://en.wikipedia.org/wiki/Sign_extension
fn sign_extend(val: u64, nbytes: usize) -> i64 {
let shift = (8 - nbytes) * 8;
(val << shift) as i64 >> shift
if nbytes == 0 {
// avoid `val << 64` panic
0
} else {
let shift = (8 - nbytes) * 8;
(val << shift) as i64 >> shift
}
}
/// Read bytes from a buffer.
tests/test_buf.rs
+18 -7
View File
@@ -250,12 +250,12 @@ macro_rules! buf_tests {
buf_tests!(number $make_input, get_f64_le, get_f64_le_overflow, f64, get_f64_le, f64::from_bits(0x7144726a727146ff));
buf_tests!(number $make_input, get_f64_ne, get_f64_ne_overflow, f64, get_f64_ne, f64::from_bits(e!(0xff4671726a724471, 0x7144726a727146ff)));
buf_tests!(var_number $make_input, get_uint_be, get_uint_be_overflow, u64, get_uint, 3, 0xff4671);
buf_tests!(var_number $make_input, get_uint_le, get_uint_le_overflow, u64, get_uint_le, 3, 0x7146ff);
buf_tests!(var_number $make_input, get_uint_ne, get_uint_ne_overflow, u64, get_uint_ne, 3, e!(0xff4671, 0x7146ff));
buf_tests!(var_number $make_input, get_int_be, get_int_be_overflow, i64, get_int, 3, 0xffffffffffff4671u64 as i64);
buf_tests!(var_number $make_input, get_int_le, get_int_le_overflow, i64, get_int_le, 3, 0x7146ff);
buf_tests!(var_number $make_input, get_int_ne, get_int_ne_overflow, i64, get_int_ne, 3, e!(0xffffffffffff4671u64 as i64, 0x7146ff));
buf_tests!(var_number $make_input, get_uint_be, get_uint_be_zero, get_uint_be_overflow, u64, get_uint, 3, 0xff4671);
buf_tests!(var_number $make_input, get_uint_le, get_uint_le_zero, get_uint_le_overflow, u64, get_uint_le, 3, 0x7146ff);
buf_tests!(var_number $make_input, get_uint_ne, get_uint_ne_zero, get_uint_ne_overflow, u64, get_uint_ne, 3, e!(0xff4671, 0x7146ff));
buf_tests!(var_number $make_input, get_int_be, get_int_be_zero, get_int_be_overflow, i64, get_int, 3, 0xffffffffffff4671u64 as i64);
buf_tests!(var_number $make_input, get_int_le, get_int_le_zero, get_int_le_overflow, i64, get_int_le, 3, 0x7146ff);
buf_tests!(var_number $make_input, get_int_ne, get_int_ne_zero, get_int_ne_overflow, i64, get_int_ne, 3, e!(0xffffffffffff4671u64 as i64, 0x7146ff));
};
(number $make_input:ident, $ok_name:ident, $panic_name:ident, $number:ty, $method:ident, $value:expr) => {
#[test]
@@ -276,7 +276,7 @@ macro_rules! buf_tests {
let _ = buf.$method();
}
};
(var_number $make_input:ident, $ok_name:ident, $panic_name:ident, $number:ty, $method:ident, $len:expr, $value:expr) => {
(var_number $make_input:ident, $ok_name:ident, $ok_zero_name:ident, $panic_name:ident, $number:ty, $method:ident, $len:expr, $value:expr) => {
#[test]
fn $ok_name() {
let mut buf = $make_input(INPUT);
@@ -287,6 +287,17 @@ macro_rules! buf_tests {
assert_eq!(value, $value);
}
// Regression test for https://github.com/tokio-rs/bytes/issues/798
#[test]
fn $ok_zero_name() {
let mut buf = $make_input(INPUT);
let value = buf.$method(0);
assert_eq!(buf.remaining(), 64);
assert!(buf.has_remaining());
assert_eq!(value, 0);
}
#[test]
#[should_panic]
fn $panic_name() {