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This commit is contained in:
John Doty 2024-03-08 11:03:01 -08:00
parent 5deceec006
commit 977e3c17e5
19434 changed files with 10682014 additions and 0 deletions
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48
third-party/vendor/ryu/src/pretty/exponent.rs vendored Normal file
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use crate::digit_table::DIGIT_TABLE;
use core::ptr;
#[cfg_attr(feature = "no-panic", inline)]
pub unsafe fn write_exponent3(mut k: isize, mut result: *mut u8) -> usize {
let sign = k < 0;
if sign {
*result = b'-';
result = result.offset(1);
k = -k;
}
debug_assert!(k < 1000);
if k >= 100 {
*result = b'0' + (k / 100) as u8;
k %= 100;
let d = DIGIT_TABLE.as_ptr().offset(k * 2);
ptr::copy_nonoverlapping(d, result.offset(1), 2);
sign as usize + 3
} else if k >= 10 {
let d = DIGIT_TABLE.as_ptr().offset(k * 2);
ptr::copy_nonoverlapping(d, result, 2);
sign as usize + 2
} else {
*result = b'0' + k as u8;
sign as usize + 1
}
}
#[cfg_attr(feature = "no-panic", inline)]
pub unsafe fn write_exponent2(mut k: isize, mut result: *mut u8) -> usize {
let sign = k < 0;
if sign {
*result = b'-';
result = result.offset(1);
k = -k;
}
debug_assert!(k < 100);
if k >= 10 {
let d = DIGIT_TABLE.as_ptr().offset(k * 2);
ptr::copy_nonoverlapping(d, result, 2);
sign as usize + 2
} else {
*result = b'0' + k as u8;
sign as usize + 1
}
}