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optimize QXmlUtils::isEncName()

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2020-09-11 18:38:57 +03:00
parent 76a9a0b943
commit 8bf1529894
1 changed files with 17 additions and 8 deletions
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25
src/xml/kernel/qxmlutils.cpp
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@ -31,7 +31,6 @@
**
****************************************************************************/
#include "qregexp.h"
#include "qstring.h"
#include "qxmlutils_p.h"
@ -194,14 +193,24 @@ static inline bool isCombiningChar(const QChar c)
*/
bool QXmlUtils::isEncName(const QString &encName)
{
/* Right, we here have a dependency on QRegExp. Writing a manual parser to
* replace that regexp is probably a 70 lines so I prioritize this to when
* the dependency is considered alarming, or when the rest of the bugs
* are fixed. */
const QRegExp encNameRegExp(QLatin1String("[A-Za-z][A-Za-z0-9._\\-]*"));
Q_ASSERT(encNameRegExp.isValid());
if (encName.size() < 2)
return false;
return encNameRegExp.exactMatch(encName);
const ushort first = encName.at(0).unicode();
if ((first >= 'a' && first <= 'z')
|| (first >= 'A' && first <= 'Z'))
{
const ushort second = encName.at(1).unicode();
if ((second >= 'a' && second <= 'z')
|| (second >= 'A' && second <= 'Z')
|| (second >= '0' && second <= '9')
|| second == '.' || second == '_' || second == '-')
{
return true;
}
}
return false;
}
/*!