exponent.rs - source

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regex_syntax

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ryu

buffer

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exponent.rs mantissa.rs mod.rs

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twox_hash

lib.rs sixty_four.rs thirty_two.rs xxh3.rs

unicode_xid

lib.rs tables.rs

utf8parse

lib.rs types.rs

vte

definitions.rs lib.rs params.rs table.rs

vte_generate_state_changes

walkdir

dent.rs error.rs lib.rs util.rs

use crate::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
    }
}