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-rw-r--r--vendor/ryu/src/pretty/mod.rs224
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diff --git a/vendor/ryu/src/pretty/mod.rs b/vendor/ryu/src/pretty/mod.rs
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-mod exponent;
-mod mantissa;
-
-use self::exponent::*;
-use self::mantissa::*;
-use crate::common;
-use crate::d2s::{self, *};
-use crate::f2s::*;
-use core::ptr;
-#[cfg(feature = "no-panic")]
-use no_panic::no_panic;
-
-/// Print f64 to the given buffer and return number of bytes written.
-///
-/// At most 24 bytes will be written.
-///
-/// ## Special cases
-///
-/// This function **does not** check for NaN or infinity. If the input
-/// number is not a finite float, the printed representation will be some
-/// correctly formatted but unspecified numerical value.
-///
-/// Please check [`is_finite`] yourself before calling this function, or
-/// check [`is_nan`] and [`is_infinite`] and handle those cases yourself.
-///
-/// [`is_finite`]: https://doc.rust-lang.org/std/primitive.f64.html#method.is_finite
-/// [`is_nan`]: https://doc.rust-lang.org/std/primitive.f64.html#method.is_nan
-/// [`is_infinite`]: https://doc.rust-lang.org/std/primitive.f64.html#method.is_infinite
-///
-/// ## Safety
-///
-/// The `result` pointer argument must point to sufficiently many writable bytes
-/// to hold Ryū's representation of `f`.
-///
-/// ## Example
-///
-/// ```
-/// use std::{mem::MaybeUninit, slice, str};
-///
-/// let f = 1.234f64;
-///
-/// unsafe {
-/// let mut buffer = [MaybeUninit::<u8>::uninit(); 24];
-/// let len = ryu::raw::format64(f, buffer.as_mut_ptr() as *mut u8);
-/// let slice = slice::from_raw_parts(buffer.as_ptr() as *const u8, len);
-/// let print = str::from_utf8_unchecked(slice);
-/// assert_eq!(print, "1.234");
-/// }
-/// ```
-#[must_use]
-#[cfg_attr(feature = "no-panic", no_panic)]
-pub unsafe fn format64(f: f64, result: *mut u8) -> usize {
- let bits = f.to_bits();
- let sign = ((bits >> (DOUBLE_MANTISSA_BITS + DOUBLE_EXPONENT_BITS)) & 1) != 0;
- let ieee_mantissa = bits & ((1u64 << DOUBLE_MANTISSA_BITS) - 1);
- let ieee_exponent =
- (bits >> DOUBLE_MANTISSA_BITS) as u32 & ((1u32 << DOUBLE_EXPONENT_BITS) - 1);
-
- let mut index = 0isize;
- if sign {
- *result = b'-';
- index += 1;
- }
-
- if ieee_exponent == 0 && ieee_mantissa == 0 {
- ptr::copy_nonoverlapping(b"0.0".as_ptr(), result.offset(index), 3);
- return sign as usize + 3;
- }
-
- let v = d2d(ieee_mantissa, ieee_exponent);
-
- let length = d2s::decimal_length17(v.mantissa) as isize;
- let k = v.exponent as isize;
- let kk = length + k; // 10^(kk-1) <= v < 10^kk
- debug_assert!(k >= -324);
-
- if 0 <= k && kk <= 16 {
- // 1234e7 -> 12340000000.0
- write_mantissa_long(v.mantissa, result.offset(index + length));
- for i in length..kk {
- *result.offset(index + i) = b'0';
- }
- *result.offset(index + kk) = b'.';
- *result.offset(index + kk + 1) = b'0';
- index as usize + kk as usize + 2
- } else if 0 < kk && kk <= 16 {
- // 1234e-2 -> 12.34
- write_mantissa_long(v.mantissa, result.offset(index + length + 1));
- ptr::copy(result.offset(index + 1), result.offset(index), kk as usize);
- *result.offset(index + kk) = b'.';
- index as usize + length as usize + 1
- } else if -5 < kk && kk <= 0 {
- // 1234e-6 -> 0.001234
- *result.offset(index) = b'0';
- *result.offset(index + 1) = b'.';
- let offset = 2 - kk;
- for i in 2..offset {
- *result.offset(index + i) = b'0';
- }
- write_mantissa_long(v.mantissa, result.offset(index + length + offset));
- index as usize + length as usize + offset as usize
- } else if length == 1 {
- // 1e30
- *result.offset(index) = b'0' + v.mantissa as u8;
- *result.offset(index + 1) = b'e';
- index as usize + 2 + write_exponent3(kk - 1, result.offset(index + 2))
- } else {
- // 1234e30 -> 1.234e33
- write_mantissa_long(v.mantissa, result.offset(index + length + 1));
- *result.offset(index) = *result.offset(index + 1);
- *result.offset(index + 1) = b'.';
- *result.offset(index + length + 1) = b'e';
- index as usize
- + length as usize
- + 2
- + write_exponent3(kk - 1, result.offset(index + length + 2))
- }
-}
-
-/// Print f32 to the given buffer and return number of bytes written.
-///
-/// At most 16 bytes will be written.
-///
-/// ## Special cases
-///
-/// This function **does not** check for NaN or infinity. If the input
-/// number is not a finite float, the printed representation will be some
-/// correctly formatted but unspecified numerical value.
-///
-/// Please check [`is_finite`] yourself before calling this function, or
-/// check [`is_nan`] and [`is_infinite`] and handle those cases yourself.
-///
-/// [`is_finite`]: https://doc.rust-lang.org/std/primitive.f32.html#method.is_finite
-/// [`is_nan`]: https://doc.rust-lang.org/std/primitive.f32.html#method.is_nan
-/// [`is_infinite`]: https://doc.rust-lang.org/std/primitive.f32.html#method.is_infinite
-///
-/// ## Safety
-///
-/// The `result` pointer argument must point to sufficiently many writable bytes
-/// to hold Ryū's representation of `f`.
-///
-/// ## Example
-///
-/// ```
-/// use std::{mem::MaybeUninit, slice, str};
-///
-/// let f = 1.234f32;
-///
-/// unsafe {
-/// let mut buffer = [MaybeUninit::<u8>::uninit(); 16];
-/// let len = ryu::raw::format32(f, buffer.as_mut_ptr() as *mut u8);
-/// let slice = slice::from_raw_parts(buffer.as_ptr() as *const u8, len);
-/// let print = str::from_utf8_unchecked(slice);
-/// assert_eq!(print, "1.234");
-/// }
-/// ```
-#[must_use]
-#[cfg_attr(feature = "no-panic", no_panic)]
-pub unsafe fn format32(f: f32, result: *mut u8) -> usize {
- let bits = f.to_bits();
- let sign = ((bits >> (FLOAT_MANTISSA_BITS + FLOAT_EXPONENT_BITS)) & 1) != 0;
- let ieee_mantissa = bits & ((1u32 << FLOAT_MANTISSA_BITS) - 1);
- let ieee_exponent = (bits >> FLOAT_MANTISSA_BITS) & ((1u32 << FLOAT_EXPONENT_BITS) - 1);
-
- let mut index = 0isize;
- if sign {
- *result = b'-';
- index += 1;
- }
-
- if ieee_exponent == 0 && ieee_mantissa == 0 {
- ptr::copy_nonoverlapping(b"0.0".as_ptr(), result.offset(index), 3);
- return sign as usize + 3;
- }
-
- let v = f2d(ieee_mantissa, ieee_exponent);
-
- let length = common::decimal_length9(v.mantissa) as isize;
- let k = v.exponent as isize;
- let kk = length + k; // 10^(kk-1) <= v < 10^kk
- debug_assert!(k >= -45);
-
- if 0 <= k && kk <= 13 {
- // 1234e7 -> 12340000000.0
- write_mantissa(v.mantissa, result.offset(index + length));
- for i in length..kk {
- *result.offset(index + i) = b'0';
- }
- *result.offset(index + kk) = b'.';
- *result.offset(index + kk + 1) = b'0';
- index as usize + kk as usize + 2
- } else if 0 < kk && kk <= 13 {
- // 1234e-2 -> 12.34
- write_mantissa(v.mantissa, result.offset(index + length + 1));
- ptr::copy(result.offset(index + 1), result.offset(index), kk as usize);
- *result.offset(index + kk) = b'.';
- index as usize + length as usize + 1
- } else if -6 < kk && kk <= 0 {
- // 1234e-6 -> 0.001234
- *result.offset(index) = b'0';
- *result.offset(index + 1) = b'.';
- let offset = 2 - kk;
- for i in 2..offset {
- *result.offset(index + i) = b'0';
- }
- write_mantissa(v.mantissa, result.offset(index + length + offset));
- index as usize + length as usize + offset as usize
- } else if length == 1 {
- // 1e30
- *result.offset(index) = b'0' + v.mantissa as u8;
- *result.offset(index + 1) = b'e';
- index as usize + 2 + write_exponent2(kk - 1, result.offset(index + 2))
- } else {
- // 1234e30 -> 1.234e33
- write_mantissa(v.mantissa, result.offset(index + length + 1));
- *result.offset(index) = *result.offset(index + 1);
- *result.offset(index + 1) = b'.';
- *result.offset(index + length + 1) = b'e';
- index as usize
- + length as usize
- + 2
- + write_exponent2(kk - 1, result.offset(index + length + 2))
- }
-}
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