Clang: Smallstring should not depend on std::ostream

We move the io operators in an extra header file because if we would
include ostream in smallstring.h we would blow the compile time.

Change-Id: Iea61ceedbbbcdd2adc6dc149794dab6e743084f8
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: Tim Jenssen <tim.jenssen@qt.io>

1 files changed, 238 insertions, 0 deletions

diff --git a/src/libs/utils/smallstringio.h b/src/libs/utils/smallstringio.h
new file mode 100644
index 0000000000..80553b82b7
--- /dev/null
+++ b/src/libs/utils/smallstringio.h
@@ -0,0 +1,238 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of Qt Creator.
+**
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+****************************************************************************/
+
+#pragma once
+
+#include "smallstringvector.h"
+
+#include <QDataStream>
+#include <QDebug>
+
+#include <ostream>
+
+namespace Utils {
+
+inline
+QDataStream &operator<<(QDataStream &out, const SmallString &string)
+{
+   if (string.isEmpty())
+       out << quint32(0);
+   else
+       out.writeBytes(string.data(), qint32(string.size()));
+
+   return out;
+}
+
+inline
+QDataStream &operator>>(QDataStream &in, SmallString &string)
+{
+    quint32 size;
+
+    in >> size;
+
+    if (size > 0 ) {
+        string.resize(size);
+
+        char *data = string.data();
+
+        in.readRawData(data, size);
+    }
+
+    return in;
+}
+
+inline
+QDebug &operator<<(QDebug &debug, const SmallString &string)
+{
+    using QT_USE_NAMESPACE::operator<<;
+
+    debug.nospace() << "\"" << string.data() << "\"";
+
+    return debug;
+}
+
+inline
+std::ostream &operator<<(std::ostream &stream, const SmallString &string)
+{
+    using std::operator<<;
+
+    return stream << std::string(string.data());
+}
+
+inline
+void PrintTo(const SmallString &string, ::std::ostream *os)
+{
+    *os << "'" << string.data() << "'";
+}
+
+inline QDataStream &operator<<(QDataStream &out, const SmallStringVector &stringVector)
+{
+    out << quint64(stringVector.size());
+
+    for (auto &&string : stringVector)
+        out << string;
+
+    return out;
+}
+
+inline
+QDataStream &operator>>(QDataStream &in, SmallStringVector &stringVector)
+{
+    stringVector.clear();
+
+    quint64 size;
+
+    in >> size;
+
+    stringVector.reserve(size);
+
+    for (quint64 i = 0; i < size; ++i) {
+        SmallString string;
+
+        in >> string;
+
+        stringVector.push_back(std::move(string));
+    }
+
+    return in;
+}
+
+inline
+QDebug operator<<(QDebug debug, const SmallStringVector &stringVector)
+{
+    debug << "StringVector(" << stringVector.join(Utils::SmallString(", ")).constData() << ")";
+
+    return debug;
+}
+
+inline
+void PrintTo(const SmallStringVector &textVector, ::std::ostream* os)
+{
+    *os << "StringVector(" << textVector.join(Utils::SmallString(", ")).constData() << ")";
+}
+
+} // namespace Utils
+
+namespace std {
+
+template<> struct hash<Utils::SmallString>
+{
+    using argument_type = Utils::SmallString;
+    using result_type = uint;
+    result_type operator()(const argument_type& string) const
+    {
+        return qHashBits(string.data(), string.size());
+    }
+};
+
+template<typename Key,
+         typename Value,
+         typename Hash = hash<Key>,
+         typename KeyEqual = equal_to<Key>,
+         typename Allocator = allocator<pair<const Key, Value>>>
+QDataStream &operator<<(QDataStream &out, const unordered_map<Key, Value, Hash, KeyEqual, Allocator> &map)
+{
+    out << quint64(map.size());
+
+    for (auto &&entry : map)
+        out << entry.first << entry.second;
+
+    return out;
+}
+
+template<typename Key,
+         typename Value,
+         typename Hash = hash<Key>,
+         typename KeyEqual = equal_to<Key>,
+         typename Allocator = allocator<pair<const Key, Value>>>
+QDataStream &operator>>(QDataStream &in, unordered_map<Key, Value, Hash, KeyEqual, Allocator> &map)
+{
+    quint64 size;
+
+    in >> size;
+
+    map.reserve(size);
+
+    for (quint64 i = 0; i < size; ++i) {
+        Key key;
+        Value value;
+
+        in >> key >> value;
+
+        map.insert(make_pair(move(key), move(value)));
+    }
+
+    return in;
+}
+
+template<typename Type>
+QDataStream &operator<<(QDataStream &out, const vector<Type> &vector)
+{
+    out << quint64(vector.size());
+
+    for (auto &&entry : vector)
+        out << entry;
+
+    return out;
+}
+
+template<typename Type>
+QDataStream &operator>>(QDataStream &in, vector<Type> &vector)
+{
+    vector.clear();
+
+    quint64 size;
+
+    in >> size;
+
+    vector.reserve(size);
+
+    for (quint64 i = 0; i < size; ++i) {
+        Type entry;
+
+        in >> entry;
+
+        vector.push_back(move(entry));
+    }
+
+    return in;
+}
+
+QT_BEGIN_NAMESPACE
+
+template<typename Type>
+QDebug &operator<<(QDebug &debug, const std::vector<Type> &vector)
+{
+    debug.noquote() << "[";
+    for (auto &&entry : vector)
+        debug.noquote() << entry << ", ";
+    debug.noquote() << "]";
+
+    return debug;
+}
+
+QT_END_NAMESPACE
+
+} // namespace std