From 4a3d5537dde71c57378da7e65e732d50f88e592a Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@digia.com>
Date: Tue, 25 Jun 2013 21:53:06 +0200
Subject: [PATCH] Remove an overoptimisation that was only used (wrongly) in
 one place

Let's simplify this code. The goal is to replace most of the
code in qhashedstring with an identifier based hash table.

Change-Id: I2f9a38ad0bb2f43a2b2b87914823c23ed231f48c
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
---
 src/qml/qml/ftw/qhashedstring.cpp | 35 -----------------------------------
 src/qml/qml/ftw/qhashedstring_p.h | 28 +++++++---------------------
 src/qml/qml/qqmlimport.cpp        |  2 +-
 3 files changed, 8 insertions(+), 57 deletions(-)

diff --git a/src/qml/qml/ftw/qhashedstring.cpp b/src/qml/qml/ftw/qhashedstring.cpp
index 99f342f..0af68e8 100644
--- a/src/qml/qml/ftw/qhashedstring.cpp
+++ b/src/qml/qml/ftw/qhashedstring.cpp
@@ -341,14 +341,6 @@ static void utf8FromUtf16(char *output, const QChar *uc, int len)
     }
 }
 
-void QHashedStringRef::computeUtf8Length() const
-{
-    if (m_length) 
-        m_utf8length = utf8LengthFromUtf16(m_data, m_length);
-    else
-        m_utf8length = 0;
-}
-
 QHashedStringRef QHashedStringRef::mid(int offset, int length) const
 {
     Q_ASSERT(offset < m_length);
@@ -396,33 +388,6 @@ QString QHashedStringRef::toString() const
     return QString(m_data, m_length);
 }
 
-QByteArray QHashedStringRef::toUtf8() const
-{
-    if (m_length == 0)
-        return QByteArray();
-
-    QByteArray result;
-    result.resize(utf8length());
-    writeUtf8(result.data());
-    return result;
-}
-
-void QHashedStringRef::writeUtf8(char *output) const
-{
-    if (m_length) {
-        int ulen = utf8length();
-        if (ulen == m_length) {
-            // Must be a latin1 string
-            uchar *o = (uchar *)output;
-            const QChar *c = m_data;
-            while (ulen--) 
-                *o++ = (uchar)((*c++).unicode());
-        } else {
-            utf8FromUtf16(output, m_data, m_length);
-        }
-    }
-}
-
 QString QHashedCStringRef::toUtf16() const
 {
     if (m_length == 0)
diff --git a/src/qml/qml/ftw/qhashedstring_p.h b/src/qml/qml/ftw/qhashedstring_p.h
index ca95839..1261db2 100644
--- a/src/qml/qml/ftw/qhashedstring_p.h
+++ b/src/qml/qml/ftw/qhashedstring_p.h
@@ -160,18 +160,13 @@ public:
 
     inline bool isLatin1() const;
 
-    inline int utf8length() const;
-    QByteArray toUtf8() const;
-    void writeUtf8(char *) const;
 private:
     friend class QHashedString;
 
     void computeHash() const;
-    void computeUtf8Length() const;
 
     const QChar *m_data;
     int m_length;
-    mutable int m_utf8length;
     mutable quint32 m_hash;
 };
 
@@ -1180,38 +1175,37 @@ QString QHashedV4String::toString() const
 }
 
 QHashedStringRef::QHashedStringRef() 
-: m_data(0), m_length(0), m_utf8length(-1), m_hash(0) 
+: m_data(0), m_length(0), m_hash(0)
 {
 }
 
 QHashedStringRef::QHashedStringRef(const QString &str)
-: m_data(str.constData()), m_length(str.length()), m_utf8length(0), m_hash(0)
+: m_data(str.constData()), m_length(str.length()), m_hash(0)
 {
 }
 
 QHashedStringRef::QHashedStringRef(const QStringRef &str)
-: m_data(str.constData()), m_length(str.length()), m_utf8length(0), m_hash(0)
+: m_data(str.constData()), m_length(str.length()), m_hash(0)
 {
 }
 
 QHashedStringRef::QHashedStringRef(const QChar *data, int length)
-: m_data(data), m_length(length), m_utf8length(0), m_hash(0)
+: m_data(data), m_length(length), m_hash(0)
 {
 }
 
 QHashedStringRef::QHashedStringRef(const QChar *data, int length, quint32 hash)
-: m_data(data), m_length(length), m_utf8length(0), m_hash(hash)
+: m_data(data), m_length(length), m_hash(hash)
 {
 }
 
 QHashedStringRef::QHashedStringRef(const QHashedString &string)
-: m_data(string.constData()), m_length(string.length()), m_utf8length(0), m_hash(string.m_hash)
+: m_data(string.constData()), m_length(string.length()), m_hash(string.m_hash)
 {
 }
 
 QHashedStringRef::QHashedStringRef(const QHashedStringRef &string)
-: m_data(string.m_data), m_length(string.m_length), m_utf8length(string.m_utf8length), 
-  m_hash(string.m_hash)
+: m_data(string.m_data), m_length(string.m_length), m_hash(string.m_hash)
 {
 }
 
@@ -1219,7 +1213,6 @@ QHashedStringRef &QHashedStringRef::operator=(const QHashedStringRef &o)
 {
     m_data = o.m_data;
     m_length = o.m_length;
-    m_utf8length = o.m_utf8length;
     m_hash = o.m_hash;
     return *this;
 }
@@ -1304,13 +1297,6 @@ int QHashedStringRef::length() const
     return m_length;
 }
 
-int QHashedStringRef::utf8length() const
-{
-    if (m_utf8length < m_length)
-        computeUtf8Length();
-    return m_utf8length;
-}
-
 bool QHashedStringRef::isLatin1() const
 {
     for (int ii = 0; ii < m_length; ++ii)
diff --git a/src/qml/qml/qqmlimport.cpp b/src/qml/qml/qqmlimport.cpp
index 50b2c8a..816f9ce 100644
--- a/src/qml/qml/qqmlimport.cpp
+++ b/src/qml/qml/qqmlimport.cpp
@@ -136,7 +136,7 @@ QQmlType *getTypeForUrl(const QString &urlString, const QHashedStringRef& typeNa
         QHashedStringRef unqualifiedtype = dot < 0 ? typeName : QHashedStringRef(typeName.constData() + dot + 1, typeName.length() - dot - 1);
 
         //XXX: The constData of the string ref is pointing somewhere unsafe in qmlregister, so we need to create a temporary copy
-        QByteArray buf(unqualifiedtype.toUtf8().constData());
+        QByteArray buf(unqualifiedtype.toString().toUtf8());
 
         QQmlPrivate::RegisterCompositeType reg = {
             url,
-- 
2.7.4