From 698f8c2f01ea549d77d7dc3338a12e04c11057b9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:02:58 +0200
Subject: Adding upstream version 1.64.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/generic-array-0.12.4/src/hex.rs | 102 +++++++++++++++++++++++++++++++++
 1 file changed, 102 insertions(+)
 create mode 100644 vendor/generic-array-0.12.4/src/hex.rs

(limited to 'vendor/generic-array-0.12.4/src/hex.rs')

diff --git a/vendor/generic-array-0.12.4/src/hex.rs b/vendor/generic-array-0.12.4/src/hex.rs
new file mode 100644
index 000000000..3ef92b1b9
--- /dev/null
+++ b/vendor/generic-array-0.12.4/src/hex.rs
@@ -0,0 +1,102 @@
+//! Generic array are commonly used as a return value for hash digests, so
+//! it's a good idea to allow to hexlify them easily. This module implements
+//! `std::fmt::LowerHex` and `std::fmt::UpperHex` traits.
+//!
+//! Example:
+//!
+//! ```rust
+//! # #[macro_use]
+//! # extern crate generic_array;
+//! # extern crate typenum;
+//! # fn main() {
+//! let array = arr![u8; 10, 20, 30];
+//! assert_eq!(format!("{:x}", array), "0a141e");
+//! # }
+//! ```
+//!
+
+use {ArrayLength, GenericArray};
+use core::cmp::min;
+use core::fmt;
+use core::ops::Add;
+use core::str;
+use typenum::*;
+
+static LOWER_CHARS: &'static [u8] = b"0123456789abcdef";
+static UPPER_CHARS: &'static [u8] = b"0123456789ABCDEF";
+
+impl<T: ArrayLength<u8>> fmt::LowerHex for GenericArray<u8, T>
+where
+    T: Add<T>,
+    <T as Add<T>>::Output: ArrayLength<u8>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let max_digits = f.precision().unwrap_or_else(|| self.len() * 2);
+        let max_hex = (max_digits >> 1) + (max_digits & 1);
+
+        if T::to_usize() < 1024 {
+            // For small arrays use a stack allocated
+            // buffer of 2x number of bytes
+            let mut res = GenericArray::<u8, Sum<T, T>>::default();
+
+            for (i, c) in self.iter().take(max_hex).enumerate() {
+                res[i * 2] = LOWER_CHARS[(c >> 4) as usize];
+                res[i * 2 + 1] = LOWER_CHARS[(c & 0xF) as usize];
+            }
+            f.write_str(unsafe { str::from_utf8_unchecked(&res[..max_digits]) })?;
+        } else {
+            // For large array use chunks of up to 1024 bytes (2048 hex chars)
+            let mut buf = [0u8; 2048];
+            let mut digits_left = max_digits;
+
+            for chunk in self[..max_hex].chunks(1024) {
+                for (i, c) in chunk.iter().enumerate() {
+                    buf[i * 2] = LOWER_CHARS[(c >> 4) as usize];
+                    buf[i * 2 + 1] = LOWER_CHARS[(c & 0xF) as usize];
+                }
+                let n = min(chunk.len() * 2, digits_left);
+                f.write_str(unsafe { str::from_utf8_unchecked(&buf[..n]) })?;
+                digits_left -= n;
+            }
+        }
+        Ok(())
+    }
+}
+
+impl<T: ArrayLength<u8>> fmt::UpperHex for GenericArray<u8, T>
+where
+    T: Add<T>,
+    <T as Add<T>>::Output: ArrayLength<u8>,
+{
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        let max_digits = f.precision().unwrap_or_else(|| self.len() * 2);
+        let max_hex = (max_digits >> 1) + (max_digits & 1);
+
+        if T::to_usize() < 1024 {
+            // For small arrays use a stack allocated
+            // buffer of 2x number of bytes
+            let mut res = GenericArray::<u8, Sum<T, T>>::default();
+
+            for (i, c) in self.iter().take(max_hex).enumerate() {
+                res[i * 2] = UPPER_CHARS[(c >> 4) as usize];
+                res[i * 2 + 1] = UPPER_CHARS[(c & 0xF) as usize];
+            }
+            f.write_str(unsafe { str::from_utf8_unchecked(&res[..max_digits]) })?;
+        } else {
+            // For large array use chunks of up to 1024 bytes (2048 hex chars)
+            let mut buf = [0u8; 2048];
+            let mut digits_left = max_digits;
+
+            for chunk in self[..max_hex].chunks(1024) {
+                for (i, c) in chunk.iter().enumerate() {
+                    buf[i * 2] = UPPER_CHARS[(c >> 4) as usize];
+                    buf[i * 2 + 1] = UPPER_CHARS[(c & 0xF) as usize];
+                }
+                let n = min(chunk.len() * 2, digits_left);
+                f.write_str(unsafe { str::from_utf8_unchecked(&buf[..n]) })?;
+                digits_left -= n;
+            }
+        }
+        Ok(())
+    }
+}
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