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Port fix for array index out of bounds in decimal conversion

Browse Source 
https://github.com/miloyip/dtoa-benchmark/issues/7

commit fe550f38669fe0f488926c1ef0feb6c101f586d6
Author: Eli Fidler <efidler@topologyinc.com>
Date:   Tue May 31 11:51:37 2016 -0400

    avoid array index out-of-bounds

    UBSAN gave "runtime error: index 13 out of bounds for type 'const uint32_t [10]'"
This commit is contained in:
Eric Fischer
2017-11-02 16:42:29 -07:00
parent dc42c7ccc2
commit 41c026796d
3 changed files with 7 additions and 2 deletions
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milo/dtoa_milo.h
+2 -1
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@@ -284,7 +284,8 @@ inline void DigitGen(const DiyFp& W, const DiyFp& Mp, uint64_t delta, std::strin
kappa--;
if (p2 < delta) {
*K += kappa;
GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * kPow10[-kappa]);
int index = -static_cast<int>(kappa);
GrisuRound(buffer, *len, delta, p2, one.f, wp_w.f * (index < 9 ? kPow10[-static_cast<int>(kappa)] : 0));
return;
}
}