Fix a number of MSVC integer conversion warnings

Mostly related to qstrlen().

Change-Id: I69e2052c83766e4fc466ed398d0d0eac011a77ec
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>

src/corelib/io/qsettings_win.cpp

@@ -233,7 +233,7 @@ static QStringList childKeysOrGroups(HKEY parentHandle, QSettingsPrivate::ChildS
     QByteArray buff(m * sizeof(wchar_t), 0);
     for (int i = 0; i < n; ++i) {
         QString item;
-        DWORD l = buff.size() / sizeof(wchar_t);
+        DWORD l = DWORD(buff.size()) / DWORD(sizeof(wchar_t));
         if (spec == QSettingsPrivate::ChildKeys) {
             res = RegEnumValue(parentHandle, i, reinterpret_cast<wchar_t *>(buff.data()), &l, 0, 0, 0, 0);
         } else {

src/corelib/kernel/qmetaobject.cpp

@@ -263,7 +263,7 @@ QObject *QMetaObject::newInstance(QGenericArgument val0,
 
     int paramCount;
     for (paramCount = 0; paramCount < MaximumParamCount; ++paramCount) {
-        int len = qstrlen(typeNames[paramCount]);
+        int len = int(qstrlen(typeNames[paramCount]));
         if (len <= 0)
             break;
         sig.append(typeNames[paramCount], len);
@@ -1184,8 +1184,8 @@ bool QMetaObject::checkConnectArgs(const char *signal, const char *method)
     while (*s2++ != '(') { }
     if (*s2 == ')' || qstrcmp(s1,s2) == 0)        // method has no args or
         return true;                                //   exact match
-    int s1len = qstrlen(s1);
-    int s2len = qstrlen(s2);
+    const auto s1len = qstrlen(s1);
+    const auto s2len = qstrlen(s2);
     if (s2len < s1len && strncmp(s1,s2,s2len-1)==0 && s1[s2len-1]==',')
         return true;                                // method has less args
     return false;
@@ -1414,7 +1414,7 @@ bool QMetaObject::invokeMethod(QObject *obj,
         return false;
 
     QVarLengthArray<char, 512> sig;
-    int len = qstrlen(member);
+    int len = int(qstrlen(member));
     if (len <= 0)
         return false;
     sig.append(member, len);
@@ -1426,7 +1426,7 @@ bool QMetaObject::invokeMethod(QObject *obj,
 
     int paramCount;
     for (paramCount = 1; paramCount < MaximumParamCount; ++paramCount) {
-        len = qstrlen(typeNames[paramCount]);
+        len = int(qstrlen(typeNames[paramCount]));
         if (len <= 0)
             break;
         sig.append(typeNames[paramCount], len);

src/corelib/kernel/qmetatype.cpp

@@ -2342,7 +2342,7 @@ static inline int qMetaTypeTypeImpl(const char *typeName, int length)
 */
 Q_CORE_EXPORT int qMetaTypeTypeInternal(const char *typeName)
 {
-    return qMetaTypeTypeImpl</*tryNormalizedType=*/false>(typeName, qstrlen(typeName));
+    return qMetaTypeTypeImpl</*tryNormalizedType=*/false>(typeName, int(qstrlen(typeName)));
 }
 
 /*!

src/corelib/kernel/qobject.cpp

@@ -3574,7 +3574,7 @@ void QMetaObject::connectSlotsByName(QObject *o)
                 // chosen 'at random' (order of declaration in source file)
                 QList<QByteArray> compatibleSignals;
                 const QMetaObject *smo = co->metaObject();
-                int sigLen = qstrlen(signal) - 1; // ignore the trailing ')'
+                int sigLen = int(qstrlen(signal)) - 1; // ignore the trailing ')'
                 for (int k = QMetaObjectPrivate::absoluteSignalCount(smo)-1; k >= 0; --k) {
                     const QMetaMethod method = QMetaObjectPrivate::signal(smo, k);
                     if (!qstrncmp(method.methodSignature().constData(), signal, sigLen)) {

src/corelib/plugin/qlibrary.cpp

@@ -270,7 +270,7 @@ static bool findPatternUnloaded(const QString &library, QLibraryPrivate *lib)
     qsizetype pos = 0;
     char pattern[] = "qTMETADATA ";
     pattern[0] = 'Q'; // Ensure the pattern "QTMETADATA" is not found in this library should QPluginLoader ever encounter it.
-    const ulong plen = qstrlen(pattern);
+    const ulong plen = ulong(qstrlen(pattern));
 #if defined (Q_OF_ELF) && defined(Q_CC_GNU)
     int r = QElfParser().parse(filedata, fdlen, library, lib, &pos, &fdlen);
     if (r == QElfParser::Corrupt || r == QElfParser::NotElf) {

src/corelib/serialization/qdatastream.cpp

@@ -1361,7 +1361,7 @@ QDataStream &QDataStream::operator<<(const char *s)
         *this << (quint32)0;
         return *this;
     }
-    uint len = qstrlen(s) + 1;                        // also write null terminator
+    int len = int(qstrlen(s)) + 1;                        // also write null terminator
     *this << (quint32)len;                        // write length specifier
     writeRawData(s, len);
     return *this;

src/corelib/text/qbytearray.cpp

@@ -636,7 +636,7 @@ QByteArray qUncompress(const uchar* data, qsizetype nbytes)
     size_t expectedSize = size_t((data[0] << 24) | (data[1] << 16) |
                                  (data[2] <<  8) | (data[3]      ));
     size_t len = qMax(expectedSize, 1ul);
-    const ulong maxPossibleSize = MaxAllocSize - sizeof(QByteArray::Data);
+    const size_t maxPossibleSize = MaxAllocSize - sizeof(QByteArray::Data);
     if (Q_UNLIKELY(len >= maxPossibleSize)) {
         // QByteArray does not support that huge size anyway.
         return invalidCompressedData();

src/corelib/text/qlocale.cpp

@@ -3992,8 +3992,8 @@ QString QLocale::currencySymbol(QLocale::CurrencySymbolFormat format) const
         return d->m_data->currencyDisplayName().getListEntry(currency_display_name_data, 0);
     case CurrencyIsoCode: {
         const char *code = d->m_data->m_currency_iso_code;
-        if (int len = qstrnlen(code, 3))
-            return QString::fromLatin1(code, len);
+        if (auto len = qstrnlen(code, 3))
+            return QString::fromLatin1(code, int(len));
         break;
     }
     }

src/network/kernel/qtldurl.cpp

@@ -102,7 +102,7 @@ static bool containsTLDEntry(QStringView entry, TLDMatchType match)
         const auto utf8 = tldData[chunk] + chunkIndex;
         if ((symbol.isEmpty() || QLatin1Char(*utf8) == symbol) && entry == QString::fromUtf8(utf8 + symbol.size()))
             return true;
-        chunkIndex += qstrlen(utf8) + 1; // +1 for the ending \0
+        chunkIndex += uint(qstrlen(utf8)) + 1; // +1 for the ending \0
     }
     return false;
 }

src/plugins/platforms/windows/qwindowsmime.cpp

@@ -678,7 +678,7 @@ QVariant QWindowsMimeText::convertToMime(const QString &mime, LPDATAOBJECT pData
             data = getData(CF_TEXT, pDataObj);
             if (!data.isEmpty()) {
                 const char* d = data.data();
-                const unsigned s = qstrlen(d);
+                const unsigned s = unsigned(qstrlen(d));
                 QByteArray r(data.size()+1, '\0');
                 char* o = r.data();
                 int j=0;