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ENH: tune efficiency of stringOps::trim

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- move left/right positions prior to substr
This commit is contained in:
Mark Olesen
2019-11-10 10:50:49 +01:00
committed by Andrew Heather
parent 60155bd90d
commit 71de630722
3 changed files with 37 additions and 24 deletions
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2
applications/test/string/Test-string.C
View File

@ -70,7 +70,7 @@ int main(int argc, char *argv[])
" $(DONOTSUBST) some other <${USER}> with '${__UNKNOWN:-some default}'"
" value "
" or with '${HOME:+Home was set}' via :+ alternative"
" or with '${__UNKNOWN:+unknown}' empty"
" or with '${__UNKNOWN:+unknown}' empty "
);
setEnv("FOAM_CASE", cwd(), true);

45
src/OpenFOAM/primitives/strings/stringOps/stringOps.C
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@ -742,12 +742,12 @@ std::string::size_type Foam::stringOps::count(const char* str, const char c)
Foam::string Foam::stringOps::expand
(
const std::string& original,
const std::string& str,
const HashTable<string, word, string::hash>& mapping,
const char sigil
)
{
string s(original);
string s(str);
inplaceExpand(s, mapping);
return s;
}
@ -877,12 +877,12 @@ void Foam::stringOps::inplaceExpand
Foam::string Foam::stringOps::expand
(
const std::string& original,
const std::string& str,
const dictionary& dict,
const char sigil
)
{
string s(original);
string s(str);
inplaceExpand(s, dict, sigil);
return s;
}
@ -917,11 +917,11 @@ void Foam::stringOps::inplaceExpand
Foam::string Foam::stringOps::expand
(
const std::string& original,
const std::string& str,
const bool allowEmpty
)
{
string s(original);
string s(str);
inplaceExpand(s, allowEmpty);
return s;
}
@ -1036,11 +1036,24 @@ void Foam::stringOps::inplaceTrimRight(std::string& s)
}
Foam::string Foam::stringOps::trim(const std::string& original)
Foam::string Foam::stringOps::trim(const std::string& str)
{
string s(original);
inplaceTrim(s);
return s;
std::string::size_type beg = 0;
std::string::size_type end = str.size();
// Right
while (beg < end && std::isspace(str[end-1]))
{
--end;
}
// Left
while (beg < end && std::isspace(str[beg]))
{
++beg;
}
return str.substr(beg, end-beg);
}
@ -1051,9 +1064,9 @@ void Foam::stringOps::inplaceTrim(std::string& s)
}
Foam::string Foam::stringOps::removeComments(const std::string& original)
Foam::string Foam::stringOps::removeComments(const std::string& str)
{
string s(original);
string s(str);
inplaceRemoveComments(s);
return s;
}
@ -1135,9 +1148,9 @@ void Foam::stringOps::inplaceRemoveComments(std::string& s)
}
Foam::string Foam::stringOps::lower(const std::string& original)
Foam::string Foam::stringOps::lower(const std::string& str)
{
string s(original);
string s(str);
inplaceLower(s);
return s;
}
@ -1155,9 +1168,9 @@ void Foam::stringOps::inplaceLower(std::string& s)
}
Foam::string Foam::stringOps::upper(const std::string& original)
Foam::string Foam::stringOps::upper(const std::string& str)
{
string s(original);
string s(str);
inplaceUpper(s);
return s;
}

14
src/OpenFOAM/primitives/strings/stringOps/stringOps.H
View File

@ -83,7 +83,7 @@ namespace stringOps
// \sa stringOps::inplaceExpand() for details
string expand
(
const std::string& original,
const std::string& str,
const HashTable<string, word, string::hash>& mapping,
const char sigil = '$'
);
@ -206,7 +206,7 @@ namespace stringOps
// \sa stringOps::inplaceExpand(std::string&, const dictionary&, char)
string expand
(
const std::string& original,
const std::string& str,
const dictionary& dict,
const char sigil = '$'
);
@ -232,7 +232,7 @@ namespace stringOps
// stringOps::inplaceExpand(std::string&, bool);
string expand
(
const std::string& original,
const std::string& str,
const bool allowEmpty = false
);
@ -271,27 +271,27 @@ namespace stringOps
void inplaceTrimRight(std::string& s);
//- Return string trimmed of leading and trailing whitespace
string trim(const std::string& original);
string trim(const std::string& str);
//- Trim leading and trailing whitespace inplace
void inplaceTrim(std::string& s);
//- Return string with C/C++ comments removed
string removeComments(const std::string& original);
string removeComments(const std::string& str);
//- Remove C/C++ comments inplace
void inplaceRemoveComments(std::string& s);
//- Return string transformed with std::tolower on each character
string lower(const std::string& original);
string lower(const std::string& str);
//- Inplace transform string with std::tolower on each character
void inplaceLower(std::string& s);
//- Return string transformed with std::toupper on each character
string upper(const std::string& original);
string upper(const std::string& str);
//- Inplace transform string with std::toupper on each character
void inplaceUpper(std::string& s);