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Make util phexdigit array reusable

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class template base_uint had its own private lookup table.
This is saving 256 bytes per instantiation.

The result is not spectacular as bitcoin-qt has only shrinked of
about 1Kb but it is still valid improvement.

Also, I have replaced a for loop with a memset() call.

Made CBigNum::SetHex() use the new HexDigit() function.

Signed-off-by: Olivier Langlois <olivier@olivierlanglois.net>
This commit is contained in:
Olivier Langlois
2013-10-10 12:35:51 -04:00
parent 15b48ab036
commit f171ec0c7d
5 changed files with 34 additions and 14 deletions
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10
src/util.cpp
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@@ -455,7 +455,7 @@ bool ParseMoney(const char* pszIn, int64& nRet)
}
static const signed char phexdigit[256] =
const signed char p_util_hexdigit[256] =
{ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
@@ -475,9 +475,9 @@ static const signed char phexdigit[256] =
bool IsHex(const string& str)
{
BOOST_FOREACH(unsigned char c, str)
BOOST_FOREACH(char c, str)
{
if (phexdigit[c] < 0)
if (HexDigit(c) < 0)
return false;
}
return (str.size() > 0) && (str.size()%2 == 0);
@@ -491,11 +491,11 @@ vector<unsigned char> ParseHex(const char* psz)
{
while (isspace(*psz))
psz++;
signed char c = phexdigit[(unsigned char)*psz++];
signed char c = HexDigit(*psz++);
if (c == (signed char)-1)
break;
unsigned char n = (c << 4);
c = phexdigit[(unsigned char)*psz++];
c = HexDigit(*psz++);
if (c == (signed char)-1)
break;
n |= c;