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preprocessor: avoid branches in tight code

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Change-Id: I8dc0910f1cf11e506eb415a6f313b47ad2d41eae
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@nokia.com>
This commit is contained in:
hjk
2012-04-16 11:33:36 +02:00
committed by hjk
parent 0b8d8568af
commit 59debcd0e9
2 changed files with 14 additions and 16 deletions
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9
src/libs/cplusplus/PPToken.cpp
View File

@@ -4,11 +4,7 @@
using namespace CPlusPlus::Internal;
ByteArrayRef::ByteArrayRef()
: m_ref(0)
, m_offset(0)
, m_length(0)
{}
const QByteArray ByteArrayRef::m_emptyByteArray;
bool ByteArrayRef::startsWith(const char *s) const
{
@@ -20,9 +16,6 @@ bool ByteArrayRef::startsWith(const char *s) const
int ByteArrayRef::count(char ch) const
{
if (!m_ref)
return 0;
int num = 0;
const char *b = start();
const char *i = b + m_length;

21
src/libs/cplusplus/PPToken.h
View File

@@ -12,7 +12,11 @@ namespace Internal {
class CPLUSPLUS_EXPORT ByteArrayRef
{
public:
ByteArrayRef();
ByteArrayRef()
: m_ref(&m_emptyByteArray)
, m_offset(0)
, m_length(0)
{}
ByteArrayRef(const QByteArray *ref)
: m_ref(ref)
@@ -32,7 +36,7 @@ public:
}
inline const char *start() const
{ return m_ref ? m_ref->constData() + m_offset : 0; }
{ return m_ref->constData() + m_offset; }
inline int length() const
{ return m_length; }
@@ -41,16 +45,16 @@ public:
{ return length(); }
inline char at(int pos) const
{ return m_ref && pos >= 0 && pos < m_length ? m_ref->at(m_offset + pos) : '\0'; }
{ return pos >= 0 && pos < m_length ? m_ref->at(m_offset + pos) : '\0'; }
inline char operator[](int pos) const
{ return at(pos); }
QByteArray toByteArray() const
{ return m_ref ? QByteArray(m_ref->constData() + m_offset, m_length) : QByteArray(); }
{ return QByteArray(m_ref->constData() + m_offset, m_length); }
bool operator==(const QByteArray &other) const
{ return m_ref ? (m_length == other.length() && !qstrncmp(m_ref->constData() + m_offset, other.constData(), m_length)) : false; }
{ return m_length == other.length() && !qstrncmp(m_ref->constData() + m_offset, other.constData(), m_length); }
bool operator!=(const QByteArray &other) const
{ return !this->operator==(other); }
@@ -59,9 +63,10 @@ public:
int count(char c) const;
private:
const QByteArray *m_ref;
int m_offset;
int m_length;
const static QByteArray m_emptyByteArray;
const QByteArray * const m_ref;
const int m_offset;
const int m_length;
};
inline bool operator==(const QByteArray &other, const ByteArrayRef &ref)