Added string classes

include/internal/catch_stringref.cpp

@@ -0,0 +1,140 @@
+/*
+ *  Copyright 2016 Two Blue Cubes Ltd. All rights reserved.
+ *
+ *  Distributed under the Boost Software License, Version 1.0. (See accompanying
+ *  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+ */
+
+#include "catch_stringref.h"
+#include "catch_stringbuilder.h"
+#include "catch_string.h"
+#include "catch_stringdata.h"
+
+#include <cstring>
+#include <ostream>
+
+namespace Catch {
+    
+    StringRef StringRef::s_emptyStringRef = "";
+    
+    StringRef::StringRef()
+    :   StringRef( s_emptyStringRef )
+    {}
+    
+    StringRef::StringRef( StringRef const& other )
+    :   m_start( other.m_start ),
+        m_size( other.m_size ),
+        m_data( other.m_data )
+    {
+        if( m_data )
+            m_data->addRef();
+    }
+    
+    StringRef::StringRef( StringRef&& other ) noexcept
+    :   m_start( other.m_start ),
+        m_size( other.m_size ),
+        m_data( other.m_data )
+    {
+        other.m_data = nullptr;
+    }
+    
+    StringRef::StringRef( char const* rawChars )
+    :   m_start( rawChars ),
+        m_size( std::strlen( rawChars ) )
+    {}
+    
+    StringRef::StringRef( char const* rawChars, size_type size )
+    :   m_start( rawChars ),
+        m_size( size )
+    {
+        size_type rawSize = rawChars == nullptr ? 0 : std::strlen( rawChars );
+        if( rawSize < size )
+            size = rawSize;
+    }
+    
+    StringRef::StringRef( String const& other )
+    :   m_start( other.c_str() ),
+        m_size( other.size() ),
+        m_data( nullptr )
+    {}
+    
+    StringRef::StringRef( String&& str ) noexcept
+    :   m_start( str.c_str() ),
+        m_size( str.size() ),
+        m_data( str.m_data )
+    {
+        str.m_data = StringData::getEmpty();
+    }
+    
+    StringRef::~StringRef() noexcept {
+        if( isOwned() )
+            m_data->release();
+    }
+    
+    auto StringRef::operator = ( StringRef other ) -> StringRef& {
+        swap( other );
+        return *this;
+    }
+
+    void StringRef::swap( StringRef& other ) noexcept {
+        std::swap( m_start, other.m_start );
+        std::swap( m_size, other.m_size );
+        std::swap( m_data, other.m_data );
+    }
+    
+    auto StringRef::c_str() const -> char const* {
+        if( isSubstring() )
+           const_cast<StringRef*>( this )->takeOwnership();
+        return m_start;
+    }
+    auto StringRef::data() const noexcept -> char const* {
+        return m_start;
+    }
+
+    auto StringRef::isOwned() const noexcept -> bool {
+        return m_data != nullptr;
+    }
+    auto StringRef::isSubstring() const noexcept -> bool {
+        return m_start[m_size] != '\0';
+    }
+    
+    void StringRef::takeOwnership() {
+        if( !isOwned() ) {
+            StringRef temp = String( *this );
+            swap( temp );
+        }        
+    }
+    auto StringRef::substr( size_type start, size_type size ) const noexcept -> StringRef {
+        if( start < m_size )
+            return StringRef( m_start+start, size );
+        else
+            return StringRef();
+    }
+    auto StringRef::operator == ( StringRef const& other ) const noexcept -> bool {
+        return
+            size() == other.size() &&
+            (std::strncmp( m_start, other.m_start, size() ) == 0);
+    }
+    auto StringRef::operator != ( StringRef const& other ) const noexcept -> bool {
+        return !operator==( other );
+    }
+        
+    auto operator + ( StringRef const& lhs, StringRef const& rhs ) -> String {
+        StringBuilder buf;
+        buf.reserve( lhs.size() + rhs.size() );
+        buf.append( lhs );
+        buf.append( rhs );
+        return String( std::move( buf ) );
+    }
+    auto operator + ( StringRef const& lhs, const char* rhs ) -> String {
+        return lhs + StringRef( rhs );
+    }
+    auto operator + ( char const* lhs, StringRef const& rhs ) -> String {
+        return StringRef( lhs ) + rhs;
+    }
+
+    std::ostream& operator << ( std::ostream& os, StringRef const& str ) {
+        return os << str.c_str();
+    }
+        
+} // namespace Catch