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/*
* 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 <ostream>
#include <cassert>
#include <cstring>
namespace Catch {
auto getEmptyStringRef() -> StringRef {
static StringRef s_emptyStringRef("");
return s_emptyStringRef;
}
StringRef::StringRef() noexcept
: StringRef( getEmptyStringRef() )
{}
StringRef::StringRef( StringRef const& other ) noexcept
: m_start( other.m_start ),
m_size( other.m_size )
{}
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 ) noexcept
: m_start( rawChars ),
m_size( static_cast<size_type>( std::strlen( rawChars ) ) )
{
assert( rawChars != nullptr );
}
StringRef::StringRef( char const* rawChars, size_type size ) noexcept
: m_start( rawChars ),
m_size( size )
{
size_type rawSize = rawChars == nullptr ? 0 : static_cast<size_type>( std::strlen( rawChars ) );
if( rawSize < size )
m_size = rawSize;
}
StringRef::StringRef( std::string const& stdString ) noexcept
: m_start( stdString.c_str() ),
m_size( stdString.size() )
{}
StringRef::~StringRef() noexcept {
delete[] m_data;
}
auto StringRef::operator = ( StringRef other ) noexcept -> StringRef& {
swap( other );
return *this;
}
StringRef::operator std::string() const {
return std::string( m_start, m_size );
}
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() ) {
m_data = new char[m_size+1];
memcpy( m_data, m_start, m_size );
m_data[m_size] = '\0';
m_start = m_data;
}
}
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 StringRef::operator[](size_type index) const noexcept -> char {
return m_start[index];
}
auto StringRef::empty() const noexcept -> bool {
return m_size == 0;
}
auto StringRef::size() const noexcept -> size_type {
return m_size;
}
auto StringRef::numberOfCharacters() const noexcept -> size_type {
size_type noChars = m_size;
// Make adjustments for uft encodings
for( size_type i=0; i < m_size; ++i ) {
char c = m_start[i];
if( ( c & 0b11000000 ) == 0b11000000 ) {
if( ( c & 0b11100000 ) == 0b11000000 )
noChars--;
else if( ( c & 0b11110000 ) == 0b11100000 )
noChars-=2;
else if( ( c & 0b11111000 ) == 0b11110000 )
noChars-=3;
}
}
return noChars;
}
auto operator + ( StringRef const& lhs, StringRef const& rhs ) -> std::string {
std::string str;
str.reserve( lhs.size() + rhs.size() );
str += lhs;
str += rhs;
return str;
}
auto operator + ( StringRef const& lhs, const char* rhs ) -> std::string {
return std::string( lhs ) + std::string( rhs );
}
auto operator + ( char const* lhs, StringRef const& rhs ) -> std::string {
return std::string( lhs ) + std::string( rhs );
}
auto operator << ( std::ostream& os, StringRef const& str ) -> std::ostream& {
return os << str.c_str();
}
} // namespace Catch
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