summaryrefslogtreecommitdiffstats
path: root/vendor/bytes/src/fmt
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-17 12:02:58 +0000
commit698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch)
tree173a775858bd501c378080a10dca74132f05bc50 /vendor/bytes/src/fmt
parentInitial commit. (diff)
downloadrustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz
rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'vendor/bytes/src/fmt')
-rw-r--r--vendor/bytes/src/fmt/debug.rs49
-rw-r--r--vendor/bytes/src/fmt/hex.rs37
-rw-r--r--vendor/bytes/src/fmt/mod.rs5
3 files changed, 91 insertions, 0 deletions
diff --git a/vendor/bytes/src/fmt/debug.rs b/vendor/bytes/src/fmt/debug.rs
new file mode 100644
index 000000000..a8545514e
--- /dev/null
+++ b/vendor/bytes/src/fmt/debug.rs
@@ -0,0 +1,49 @@
+use core::fmt::{Debug, Formatter, Result};
+
+use super::BytesRef;
+use crate::{Bytes, BytesMut};
+
+/// Alternative implementation of `std::fmt::Debug` for byte slice.
+///
+/// Standard `Debug` implementation for `[u8]` is comma separated
+/// list of numbers. Since large amount of byte strings are in fact
+/// ASCII strings or contain a lot of ASCII strings (e. g. HTTP),
+/// it is convenient to print strings as ASCII when possible.
+impl Debug for BytesRef<'_> {
+ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+ write!(f, "b\"")?;
+ for &b in self.0 {
+ // https://doc.rust-lang.org/reference/tokens.html#byte-escapes
+ if b == b'\n' {
+ write!(f, "\\n")?;
+ } else if b == b'\r' {
+ write!(f, "\\r")?;
+ } else if b == b'\t' {
+ write!(f, "\\t")?;
+ } else if b == b'\\' || b == b'"' {
+ write!(f, "\\{}", b as char)?;
+ } else if b == b'\0' {
+ write!(f, "\\0")?;
+ // ASCII printable
+ } else if b >= 0x20 && b < 0x7f {
+ write!(f, "{}", b as char)?;
+ } else {
+ write!(f, "\\x{:02x}", b)?;
+ }
+ }
+ write!(f, "\"")?;
+ Ok(())
+ }
+}
+
+impl Debug for Bytes {
+ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+ Debug::fmt(&BytesRef(&self.as_ref()), f)
+ }
+}
+
+impl Debug for BytesMut {
+ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+ Debug::fmt(&BytesRef(&self.as_ref()), f)
+ }
+}
diff --git a/vendor/bytes/src/fmt/hex.rs b/vendor/bytes/src/fmt/hex.rs
new file mode 100644
index 000000000..97a749a33
--- /dev/null
+++ b/vendor/bytes/src/fmt/hex.rs
@@ -0,0 +1,37 @@
+use core::fmt::{Formatter, LowerHex, Result, UpperHex};
+
+use super::BytesRef;
+use crate::{Bytes, BytesMut};
+
+impl LowerHex for BytesRef<'_> {
+ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+ for &b in self.0 {
+ write!(f, "{:02x}", b)?;
+ }
+ Ok(())
+ }
+}
+
+impl UpperHex for BytesRef<'_> {
+ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+ for &b in self.0 {
+ write!(f, "{:02X}", b)?;
+ }
+ Ok(())
+ }
+}
+
+macro_rules! hex_impl {
+ ($tr:ident, $ty:ty) => {
+ impl $tr for $ty {
+ fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+ $tr::fmt(&BytesRef(self.as_ref()), f)
+ }
+ }
+ };
+}
+
+hex_impl!(LowerHex, Bytes);
+hex_impl!(LowerHex, BytesMut);
+hex_impl!(UpperHex, Bytes);
+hex_impl!(UpperHex, BytesMut);
diff --git a/vendor/bytes/src/fmt/mod.rs b/vendor/bytes/src/fmt/mod.rs
new file mode 100644
index 000000000..676d15fc2
--- /dev/null
+++ b/vendor/bytes/src/fmt/mod.rs
@@ -0,0 +1,5 @@
+mod debug;
+mod hex;
+
+/// `BytesRef` is not a part of public API of bytes crate.
+struct BytesRef<'a>(&'a [u8]);