lyx_mirror/src/support/trivstring.cpp

/**
 * \file trivstring.cpp
 * This file is part of LyX, the document processor.
 * Licence details can be found in the file COPYING.
 *
 * \author Georg Baum
 *
 * Full author contact details are available in file CREDITS.
 */

#include <config.h>

#include "support/trivstring.h"
#include "support/docstring.h"

#ifdef STD_STRING_USES_COW
#include <algorithm>
#include <ostream>
#include <stdexcept>

using namespace std;

namespace lyx {

template trivial_string<char>::trivial_string(trivial_string const &);
template trivial_string<char_type>::trivial_string(trivial_string const &);
template<typename Char>
trivial_string<Char>::trivial_string(trivial_string const & that) : size_(that.size_)
{
	if (use_sso())
		copy(that.data_sso(), that.data_sso() + size_ + 1, data_sso());
	else if (size_ > 0) {
		data_ = new Char[size_ + 1];
		copy(that.data_, that.data_ + size_ + 1, data_);
	} else {
		// Happens only for really big Char types
		data_ = 0;
	}
}


template<typename Char>
trivial_string<Char>::trivial_string(Char const * that, size_t n) : size_(n)
{
	if (use_sso()) {
		copy(that, that + size_, data_sso());
		data_sso()[size_] = '\0';
	} else if (size_ > 0) {
		data_ = new Char[size_ + 1];
		copy(that, that + size_, data_);
		data_[size_] = '\0';
	} else {
		// Happens only for really big Char types
		data_ = 0;
	}
}


template trivial_string<char>::trivial_string(string const &);
template trivial_string<char_type>::trivial_string(docstring const &);
template<typename Char>
trivial_string<Char>::trivial_string(
		basic_string<Char, char_traits<Char>, allocator<Char> > const & that)
	: size_(that.length())
{
	if (use_sso()) {
		copy(that.begin(), that.end(), data_sso());
		data_sso()[size_] = '\0';
	} else if (size_ > 0) {
		data_ = new Char[size_ + 1];
		copy(that.begin(), that.end(), data_);
		data_[size_] = '\0';
	} else {
		// Happens only for really big Char types
		data_ = 0;
	}
}


template trivial_string<char> &
trivial_string<char>::operator=(trivial_string const &);
template trivial_string<char_type> &
trivial_string<char_type>::operator=(trivial_string const &);
template<typename Char>
trivial_string<Char> & trivial_string<Char>::operator=(trivial_string const & that)
{
	if (&that == this)
		return *this;
	if (!use_sso())
		delete[] data_;
	size_ = that.size_;
	if (use_sso())
		copy(that.data_sso(), that.data_sso() + size_ + 1, data_sso());
	else if (size_ > 0) {
		data_ = new Char[size_ + 1];
		copy(that.data_, that.data_ + size_ + 1, data_);
	} else {
		// Happens only for really big Char types
		data_ = 0;
	}
	return *this;
}


template trivial_string<char> &
trivial_string<char>::operator=(string const &);
template trivial_string<char_type> &
trivial_string<char_type>::operator=(docstring const &);
template<typename Char>
trivial_string<Char> &
trivial_string<Char>::operator=(basic_string<Char, char_traits<Char>, allocator<Char> > const & that)
{
	if (!use_sso())
		delete[] data_;
	size_ = that.size();
	if (use_sso()) {
		copy(that.begin(), that.end(), data_sso());
		data_sso()[size_] = '\0';
	} else if (size_ > 0) {
		data_ = new Char[size_ + 1];
		copy(that.begin(), that.end(), data_);
	} else {
		// Happens only for really big Char types
		data_ = 0;
	}
	return *this;
}


template void
trivial_string<char>::swap(trivial_string<char> &);
template void
trivial_string<char_type>::swap(trivial_string<char_type> &);
template<typename Char>
void trivial_string<Char>::swap(trivial_string & that)
{
	size_t const sizetmp = that.size_;
	that.size_ = size_;
	size_ = sizetmp;
	Char * const datatmp = that.data_;
	that.data_ = data_;
	data_ = datatmp;
}


template<typename Char>
int trivial_string<Char>::compare(trivial_string const & other) const
{
	size_t const lsize = this->length();
	size_t const rsize = other.length();
	size_t const len = min(lsize, rsize);
	int r = char_traits<Char>::compare(c_str(), other.c_str(), len);
	if (r == 0) {
		if (lsize > rsize)
			r = 1;
		else if (lsize < rsize)
			r = -1;
	}
	return r;
}


template trivial_string<char> trivial_string<char>::substr(size_t, size_t) const;
template trivial_string<char_type> trivial_string<char_type>::substr(size_t, size_t) const;
template<typename Char>
trivial_string<Char> trivial_string<Char>::substr(size_t pos, size_t n) const
{
	if (pos > length())
		throw out_of_range("trivial_string::substr");
	if (n == basic_string<Char, char_traits<Char>, allocator<Char> >::npos)
		n = length() - pos; 
	size_t const l = min(pos + n, length());
	return trivial_string(c_str() + pos, l - pos);
}


template trivial_string<char>::operator string() const;
template trivial_string<char_type>::operator docstring() const;
template<typename Char>
trivial_string<Char>::operator basic_string<Char, char_traits<Char>, allocator<Char> >() const
{
	if (use_sso())
		return basic_string<Char, char_traits<Char>, allocator<Char> >(
				data_sso(), size_);
	if (size_ > 0)
		return basic_string<Char, char_traits<Char>, allocator<Char> >(
				data_, size_);
	// Happens only for really big Char types
	return basic_string<Char, char_traits<Char>, allocator<Char> >();
}


template<typename Char> Char const * trivial_string<Char>::c_str() const
{
	if (use_sso())
		return data_sso();
	if (size_ > 0)
		return data_;
	// Happens only for really big Char types
	static const Char empty_char = '\0';
	return &empty_char;
}


template char trivial_string<char>::operator[](size_t) const;
template char_type trivial_string<char_type>::operator[](size_t) const;
template <typename Char> Char trivial_string<Char>::operator[](size_t i) const
{
	return c_str()[i];
}


template bool operator<(trivial_string<char> const &,
                        trivial_string<char> const &);
template bool operator<(trivial_string<char_type> const &,
                        trivial_string<char_type> const &);
template <typename Char>
bool operator<(trivial_string<Char> const & lhs, trivial_string<Char> const & rhs)
{
	return lhs.compare(rhs) < 0;
}


template bool operator==(trivial_string<char> const &,
                         trivial_string<char> const &);
template bool operator==(trivial_string<char_type> const &,
                         trivial_string<char_type> const &);
template <typename Char>
bool operator==(trivial_string<Char> const & lhs, trivial_string<Char> const & rhs)
{
	return lhs.compare(rhs) == 0; 
}


template bool operator==(trivial_string<char> const &, char const *);
template bool operator==(trivial_string<char_type> const &, char_type const *);
template <typename Char>
bool operator==(trivial_string<Char> const & lhs, Char const * rhs)
{
	return lhs.compare(trivial_string<Char>(rhs)) == 0; 
}


template bool operator==(char const *, trivial_string<char> const &);
template bool operator==(char_type const *, trivial_string<char_type> const &);
template <typename Char>
bool operator==(Char const * lhs, trivial_string<Char> const & rhs)
{
	return rhs.compare(trivial_string<Char>(lhs)) == 0; 
}


template ostream & operator<<(ostream &, trivial_string<char> const &);
template odocstream & operator<<(odocstream &, trivial_string<char_type> const &);
template <typename Char>
basic_ostream<Char, char_traits<Char> > &
operator<<(basic_ostream<Char, char_traits<Char> > & os, trivial_string<Char> const & s)
{
	return os << basic_string<Char, char_traits<Char>, allocator<Char> >(s);
}

} // namespace lyx
#endif