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Rearrange characters in whitespace string 

The arrangement saves about 1.3 seconds when running the test vectors. It looks like the tab character is dominant, so we profit by listing it first.
pull/186/merge
Jeffrey Walton 2017-05-14 04:09:26 -04:00
parent 2c570e27a0
commit 017f7f61b4
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1 changed files with 7 additions and 8 deletions
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datatest.cpp
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@ -712,20 +712,19 @@ bool GetField(std::istream &is, std::string &name, std::string &value)
}
}
// Leading, trailing and temp position. The leading position moves right, and
// trailing position moves left. The sub-string in the middle is the value for
// the name. We leave one space when line continuation is in effect, (and if
// present). The value can be an empty string. One Plaintext value is often
// empty for algorithm testing.
// Leading and trailing position. The leading position moves right, and
// trailing position moves left. The sub-string in the middle is the value
// for the name. We leave one space when line continuation is in effect.
// The value can be an empty string. One Plaintext value is often empty
// for algorithm testing.
std::string::size_type l=0, t=std::string::npos;
const std::string whitespace = " \r\n\t\v\f";
const std::string whitespace = "\t \r\n";
l = line.find_first_not_of(whitespace, l);
if (l == std::string::npos) { l = 0; }
t = line.find('#', l);
if (t != std::string::npos) { t--; }
t = line.find_last_not_of(whitespace+"\\", t);
t = line.find_last_not_of(whitespace, t);
if (t != std::string::npos) { t++; }
CRYPTOPP_ASSERT(t >= l);