1 files changed, 0 insertions, 218 deletions
diff --git a/vendor/serde_json/src/lexical/bhcomp.rs b/vendor/serde_json/src/lexical/bhcomp.rs
deleted file mode 100644
index 1f2a7bb..0000000
--- a/vendor/serde_json/src/lexical/bhcomp.rs
+++ /dev/null
@@ -1,218 +0,0 @@
-// Adapted from https://github.com/Alexhuszagh/rust-lexical.
-
-//! Compare the mantissa to the halfway representation of the float.
-//!
-//! Compares the actual significant digits of the mantissa to the
-//! theoretical digits from `b+h`, scaled into the proper range.
-
-use super::bignum::*;
-use super::digit::*;
-use super::exponent::*;
-use super::float::*;
-use super::math::*;
-use super::num::*;
-use super::rounding::*;
-use core::{cmp, mem};
-
-// MANTISSA
-
-/// Parse the full mantissa into a big integer.
-///
-/// Max digits is the maximum number of digits plus one.
-fn parse_mantissa<F>(integer: &[u8], fraction: &[u8]) -> Bigint
-where
-    F: Float,
-{
-    // Main loop
-    let small_powers = POW10_LIMB;
-    let step = small_powers.len() - 2;
-    let max_digits = F::MAX_DIGITS - 1;
-    let mut counter = 0;
-    let mut value: Limb = 0;
-    let mut i: usize = 0;
-    let mut result = Bigint::default();
-
-    // Iteratively process all the data in the mantissa.
-    for &digit in integer.iter().chain(fraction) {
-        // We've parsed the max digits using small values, add to bignum
-        if counter == step {
-            result.imul_small(small_powers[counter]);
-            result.iadd_small(value);
-            counter = 0;
-            value = 0;
-        }
-
-        value *= 10;
-        value += as_limb(to_digit(digit).unwrap());
-
-        i += 1;
-        counter += 1;
-        if i == max_digits {
-            break;
-        }
-    }
-
-    // We will always have a remainder, as long as we entered the loop
-    // once, or counter % step is 0.
-    if counter != 0 {
-        result.imul_small(small_powers[counter]);
-        result.iadd_small(value);
-    }
-
-    // If we have any remaining digits after the last value, we need
-    // to add a 1 after the rest of the array, it doesn't matter where,
-    // just move it up. This is good for the worst-possible float
-    // representation. We also need to return an index.
-    // Since we already trimmed trailing zeros, we know there has
-    // to be a non-zero digit if there are any left.
-    if i < integer.len() + fraction.len() {
-        result.imul_small(10);
-        result.iadd_small(1);
-    }
-
-    result
-}
-
-// FLOAT OPS
-
-/// Calculate `b` from a a representation of `b` as a float.
-#[inline]
-pub(super) fn b_extended<F: Float>(f: F) -> ExtendedFloat {
-    ExtendedFloat::from_float(f)
-}
-
-/// Calculate `b+h` from a a representation of `b` as a float.
-#[inline]
-pub(super) fn bh_extended<F: Float>(f: F) -> ExtendedFloat {
-    // None of these can overflow.
-    let b = b_extended(f);
-    ExtendedFloat {
-        mant: (b.mant << 1) + 1,
-        exp: b.exp - 1,
-    }
-}
-
-// ROUNDING
-
-/// Custom round-nearest, tie-event algorithm for bhcomp.
-#[inline]
-fn round_nearest_tie_even(fp: &mut ExtendedFloat, shift: i32, is_truncated: bool) {
-    let (mut is_above, mut is_halfway) = round_nearest(fp, shift);
-    if is_halfway && is_truncated {
-        is_above = true;
-        is_halfway = false;
-    }
-    tie_even(fp, is_above, is_halfway);
-}
-
-// BHCOMP
-
-/// Calculate the mantissa for a big integer with a positive exponent.
-fn large_atof<F>(mantissa: Bigint, exponent: i32) -> F
-where
-    F: Float,
-{
-    let bits = mem::size_of::<u64>() * 8;
-
-    // Simple, we just need to multiply by the power of the radix.
-    // Now, we can calculate the mantissa and the exponent from this.
-    // The binary exponent is the binary exponent for the mantissa
-    // shifted to the hidden bit.
-    let mut bigmant = mantissa;
-    bigmant.imul_pow10(exponent as u32);
-
-    // Get the exact representation of the float from the big integer.
-    let (mant, is_truncated) = bigmant.hi64();
-    let exp = bigmant.bit_length() as i32 - bits as i32;
-    let mut fp = ExtendedFloat { mant, exp };
-    fp.round_to_native::<F, _>(|fp, shift| round_nearest_tie_even(fp, shift, is_truncated));
-    into_float(fp)
-}
-
-/// Calculate the mantissa for a big integer with a negative exponent.
-///
-/// This invokes the comparison with `b+h`.
-fn small_atof<F>(mantissa: Bigint, exponent: i32, f: F) -> F
-where
-    F: Float,
-{
-    // Get the significant digits and radix exponent for the real digits.
-    let mut real_digits = mantissa;
-    let real_exp = exponent;
-    debug_assert!(real_exp < 0);
-
-    // Get the significant digits and the binary exponent for `b+h`.
-    let theor = bh_extended(f);
-    let mut theor_digits = Bigint::from_u64(theor.mant);
-    let theor_exp = theor.exp;
-
-    // We need to scale the real digits and `b+h` digits to be the same
-    // order. We currently have `real_exp`, in `radix`, that needs to be
-    // shifted to `theor_digits` (since it is negative), and `theor_exp`
-    // to either `theor_digits` or `real_digits` as a power of 2 (since it
-    // may be positive or negative). Try to remove as many powers of 2
-    // as possible. All values are relative to `theor_digits`, that is,
-    // reflect the power you need to multiply `theor_digits` by.
-
-    // Can remove a power-of-two, since the radix is 10.
-    // Both are on opposite-sides of equation, can factor out a
-    // power of two.
-    //
-    // Example: 10^-10, 2^-10   -> ( 0, 10, 0)
-    // Example: 10^-10, 2^-15   -> (-5, 10, 0)
-    // Example: 10^-10, 2^-5    -> ( 5, 10, 0)
-    // Example: 10^-10, 2^5 -> (15, 10, 0)
-    let binary_exp = theor_exp - real_exp;
-    let halfradix_exp = -real_exp;
-    let radix_exp = 0;
-
-    // Carry out our multiplication.
-    if halfradix_exp != 0 {
-        theor_digits.imul_pow5(halfradix_exp as u32);
-    }
-    if radix_exp != 0 {
-        theor_digits.imul_pow10(radix_exp as u32);
-    }
-    if binary_exp > 0 {
-        theor_digits.imul_pow2(binary_exp as u32);
-    } else if binary_exp < 0 {
-        real_digits.imul_pow2(-binary_exp as u32);
-    }
-
-    // Compare real digits to theoretical digits and round the float.
-    match real_digits.compare(&theor_digits) {
-        cmp::Ordering::Greater => f.next_positive(),
-        cmp::Ordering::Less => f,
-        cmp::Ordering::Equal => f.round_positive_even(),
-    }
-}
-
-/// Calculate the exact value of the float.
-///
-/// Note: fraction must not have trailing zeros.
-pub(crate) fn bhcomp<F>(b: F, integer: &[u8], mut fraction: &[u8], exponent: i32) -> F
-where
-    F: Float,
-{
-    // Calculate the number of integer digits and use that to determine
-    // where the significant digits start in the fraction.
-    let integer_digits = integer.len();
-    let fraction_digits = fraction.len();
-    let digits_start = if integer_digits == 0 {
-        let start = fraction.iter().take_while(|&x| *x == b'0').count();
-        fraction = &fraction[start..];
-        start
-    } else {
-        0
-    };
-    let sci_exp = scientific_exponent(exponent, integer_digits, digits_start);
-    let count = F::MAX_DIGITS.min(integer_digits + fraction_digits - digits_start);
-    let scaled_exponent = sci_exp + 1 - count as i32;
-
-    let mantissa = parse_mantissa::<F>(integer, fraction);
-    if scaled_exponent >= 0 {
-        large_atof(mantissa, scaled_exponent)
-    } else {
-        small_atof(mantissa, scaled_exponent, b)
-    }
-}