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Merge pull request #3076 from lano1106/uint256_util

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Make util phexdigit array reusable
This commit is contained in:
Wladimir J. van der Laan
2013-11-04 05:55:37 -08:00
parent 97f844dd95 f171ec0c7d
commit bac72640ee
5 changed files with 34 additions and 14 deletions
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6
src/bignum.h
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@@ -347,13 +347,13 @@ public:
psz++;
// hex string to bignum
static const signed char phexdigit[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0 };
*this = 0;
while (isxdigit(*psz))
int n;
while ((n = HexDigit(*psz)) != -1)
{
*this <<= 4;
int n = phexdigit[(unsigned char)*psz++];
*this += n;
++psz;
}
if (fNegative)
*this = 0 - *this;