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authormo khan <mo@mokhan.ca>2025-07-17 12:37:14 -0600
committermo khan <mo@mokhan.ca>2025-07-17 12:37:14 -0600
commit814a864184affab624f7d1e5314cd1f55d72b90c (patch)
tree0271aea841154d214471427bfcfa9d928636749e /vendor/arrayvec/src/char.rs
parent09e0702b7519fd06f6ba953eabae1b838896158b (diff)
refactor: remove cedar
Diffstat (limited to 'vendor/arrayvec/src/char.rs')
-rw-r--r--vendor/arrayvec/src/char.rs99
1 files changed, 0 insertions, 99 deletions
diff --git a/vendor/arrayvec/src/char.rs b/vendor/arrayvec/src/char.rs
deleted file mode 100644
index 03d64fcd..00000000
--- a/vendor/arrayvec/src/char.rs
+++ /dev/null
@@ -1,99 +0,0 @@
-// Copyright 2012-2016 The Rust Project Developers. See the COPYRIGHT
-// file at the top-level directory of this distribution and at
-// http://rust-lang.org/COPYRIGHT.
-//
-// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
-// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
-// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
-// option. This file may not be copied, modified, or distributed
-// except according to those terms.
-//
-// Original authors: alexchrichton, bluss
-
-use std::ptr;
-
-// UTF-8 ranges and tags for encoding characters
-const TAG_CONT: u8 = 0b1000_0000;
-const TAG_TWO_B: u8 = 0b1100_0000;
-const TAG_THREE_B: u8 = 0b1110_0000;
-const TAG_FOUR_B: u8 = 0b1111_0000;
-const MAX_ONE_B: u32 = 0x80;
-const MAX_TWO_B: u32 = 0x800;
-const MAX_THREE_B: u32 = 0x10000;
-
-/// Placeholder
-pub struct EncodeUtf8Error;
-
-#[inline]
-unsafe fn write(ptr: *mut u8, index: usize, byte: u8) {
- ptr::write(ptr.add(index), byte)
-}
-
-/// Encode a char into buf using UTF-8.
-///
-/// On success, return the byte length of the encoding (1, 2, 3 or 4).<br>
-/// On error, return `EncodeUtf8Error` if the buffer was too short for the char.
-///
-/// Safety: `ptr` must be writable for `len` bytes.
-#[inline]
-pub unsafe fn encode_utf8(ch: char, ptr: *mut u8, len: usize) -> Result<usize, EncodeUtf8Error>
-{
- let code = ch as u32;
- if code < MAX_ONE_B && len >= 1 {
- write(ptr, 0, code as u8);
- return Ok(1);
- } else if code < MAX_TWO_B && len >= 2 {
- write(ptr, 0, (code >> 6 & 0x1F) as u8 | TAG_TWO_B);
- write(ptr, 1, (code & 0x3F) as u8 | TAG_CONT);
- return Ok(2);
- } else if code < MAX_THREE_B && len >= 3 {
- write(ptr, 0, (code >> 12 & 0x0F) as u8 | TAG_THREE_B);
- write(ptr, 1, (code >> 6 & 0x3F) as u8 | TAG_CONT);
- write(ptr, 2, (code & 0x3F) as u8 | TAG_CONT);
- return Ok(3);
- } else if len >= 4 {
- write(ptr, 0, (code >> 18 & 0x07) as u8 | TAG_FOUR_B);
- write(ptr, 1, (code >> 12 & 0x3F) as u8 | TAG_CONT);
- write(ptr, 2, (code >> 6 & 0x3F) as u8 | TAG_CONT);
- write(ptr, 3, (code & 0x3F) as u8 | TAG_CONT);
- return Ok(4);
- };
- Err(EncodeUtf8Error)
-}
-
-
-#[test]
-#[cfg_attr(miri, ignore)] // Miri is too slow
-fn test_encode_utf8() {
- // Test that all codepoints are encoded correctly
- let mut data = [0u8; 16];
- for codepoint in 0..=(std::char::MAX as u32) {
- if let Some(ch) = std::char::from_u32(codepoint) {
- for elt in &mut data { *elt = 0; }
- let ptr = data.as_mut_ptr();
- let len = data.len();
- unsafe {
- let res = encode_utf8(ch, ptr, len).ok().unwrap();
- assert_eq!(res, ch.len_utf8());
- }
- let string = std::str::from_utf8(&data).unwrap();
- assert_eq!(string.chars().next(), Some(ch));
- }
- }
-}
-
-#[test]
-fn test_encode_utf8_oob() {
- // test that we report oob if the buffer is too short
- let mut data = [0u8; 16];
- let chars = ['a', 'α', '�', '𐍈'];
- for (len, &ch) in (1..=4).zip(&chars) {
- assert_eq!(len, ch.len_utf8(), "Len of ch={}", ch);
- let ptr = data.as_mut_ptr();
- unsafe {
- assert!(matches::matches!(encode_utf8(ch, ptr, len - 1), Err(_)));
- assert!(matches::matches!(encode_utf8(ch, ptr, len), Ok(_)));
- }
- }
-}
-