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Adding a guard.

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This commit is contained in:
Daniel Lemire 2020-11-20 16:09:53 -05:00
parent 1283ea199b
commit 8fde4bad4e
1 changed files with 5 additions and 2 deletions
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7
include/fast_float/decimal_to_binary.h
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@ -101,8 +101,11 @@ adjusted_mantissa compute_float(int64_t q, uint64_t w) noexcept {
// In some very rare cases, this could happen, in which case we might need a more accurate
// computation that what we can provide cheaply. This is very, very unlikely.
//
answer.power2 = -1; // This (a negative value) indicates an error condition.
return answer;
const bool inside_safe_exponent = (q >= 0) && (q <= 55); // always good because 5**q <2**128.
if(!inside_safe_exponent) {
answer.power2 = -1; // This (a negative value) indicates an error condition.
return answer;
}
}
// The "compute_product_approximation" function can be slightly slower than a branchless approach:
// value128 product = compute_product(q, w);