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FIX: Minor code style change in the char module

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Just use the simple inherent pointer methods here.
This commit is contained in:
bluss
2021-03-25 18:36:00 +01:00
parent 0aab340c43
commit 57e140065f
1 changed files with 10 additions and 17 deletions
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src/char.rs
+10 -17
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@@ -10,8 +10,6 @@
//
// 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;
@@ -24,11 +22,6 @@ 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>
@@ -40,22 +33,22 @@ pub unsafe fn encode_utf8(ch: char, ptr: *mut u8, len: usize) -> Result<usize, E
{
let code = ch as u32;
if code < MAX_ONE_B && len >= 1 {
write(ptr, 0, code as u8);
ptr.add(0).write(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);
ptr.add(0).write((code >> 6 & 0x1F) as u8 | TAG_TWO_B);
ptr.add(1).write((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);
ptr.add(0).write((code >> 12 & 0x0F) as u8 | TAG_THREE_B);
ptr.add(1).write((code >> 6 & 0x3F) as u8 | TAG_CONT);
ptr.add(2).write((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);
ptr.add(0).write((code >> 18 & 0x07) as u8 | TAG_FOUR_B);
ptr.add(1).write((code >> 12 & 0x3F) as u8 | TAG_CONT);
ptr.add(2).write((code >> 6 & 0x3F) as u8 | TAG_CONT);
ptr.add(3).write((code & 0x3F) as u8 | TAG_CONT);
return Ok(4);
};
Err(EncodeUtf8Error)