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Diffstat (limited to '')
-rw-r--r-- | vendor/ryu/src/pretty/exponent.rs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/vendor/ryu/src/pretty/exponent.rs b/vendor/ryu/src/pretty/exponent.rs new file mode 100644 index 000000000..b72add5e8 --- /dev/null +++ b/vendor/ryu/src/pretty/exponent.rs @@ -0,0 +1,48 @@ +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 + } +} |