vstring.tcc

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// Versatile string -*- C++ -*-

// Copyright (C) 2005 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.

// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.

// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.

/** @file ext/vstring.tcc
 *  This file is a GNU extension to the Standard C++ Library.
 *  This is an internal header file, included by other library headers.
 *  You should not attempt to use it directly.
 */

#ifndef _VSTRING_TCC
#define _VSTRING_TCC 1

#pragma GCC system_header

namespace __gnu_cxx
{
  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    const typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::npos;

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    void
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    resize(size_type __n, _CharT __c)
    {
      const size_type __size = this->size();
      if (__size < __n)
	this->append(__n - __size, __c);
      else if (__n < __size)
	this->_M_erase(__n, __size - __n);
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>&
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    _M_append(const _CharT* __s, size_type __n)
    {
      const size_type __len = __n + this->size();

      if (__len <= this->capacity() && !this->_M_is_shared())
	{
	  if (__n)
	    this->_S_copy(this->_M_data() + this->size(), __s, __n);
	}
      else
	this->_M_mutate(this->size(), size_type(0), __s, __n);

      this->_M_set_length(__len);
      return *this;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    template<typename _InputIterator>
      __versa_string<_CharT, _Traits, _Alloc, _Base>&
      __versa_string<_CharT, _Traits, _Alloc, _Base>::
      _M_replace_dispatch(iterator __i1, iterator __i2, _InputIterator __k1,
			  _InputIterator __k2, __false_type)
      {
	const __versa_string __s(__k1, __k2);
	const size_type __n1 = __i2 - __i1;
	return _M_replace(__i1 - _M_ibegin(), __n1, __s._M_data(),
			  __s.size());
      }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>&
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    _M_replace_aux(size_type __pos1, size_type __n1, size_type __n2,
		   _CharT __c)
    {
      _M_check_length(__n1, __n2, "__versa_string::_M_replace_aux");

      const size_type __old_size = this->size();
      const size_type __new_size = __old_size + __n2 - __n1;

      if (__new_size <= this->capacity() && !this->_M_is_shared())
	{
	  _CharT* __p = this->_M_data() + __pos1;

	  const size_type __how_much = __old_size - __pos1 - __n1;
	  if (__how_much && __n1 != __n2)
	    this->_S_move(__p + __n2, __p + __n1, __how_much);
	}
      else
	this->_M_mutate(__pos1, __n1, 0, __n2);

      if (__n2)
	this->_S_assign(this->_M_data() + __pos1, __n2, __c);

      this->_M_set_length(__new_size);
      return *this;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>&
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    _M_replace(size_type __pos, size_type __len1, const _CharT* __s,
	       const size_type __len2)
    {
      _M_check_length(__len1, __len2, "__versa_string::_M_replace");

      const size_type __old_size = this->size();
      const size_type __new_size = __old_size + __len2 - __len1;
      
      if (__new_size <= this->capacity() && !this->_M_is_shared())
	{
	  _CharT* __p = this->_M_data() + __pos;

	  const size_type __how_much = __old_size - __pos - __len1;
	  if (_M_disjunct(__s))
	    {
	      if (__how_much && __len1 != __len2)
		this->_S_move(__p + __len2, __p + __len1, __how_much);
	      if (__len2)
		this->_S_copy(__p, __s, __len2);
	    }
	  else
	    {
	      // Work in-place.
	      if (__len2 && __len2 <= __len1)
		this->_S_move(__p, __s, __len2);
	      if (__how_much && __len1 != __len2)
		this->_S_move(__p + __len2, __p + __len1, __how_much);
	      if (__len2 > __len1)
		{
		  if (__s + __len2 <= __p + __len1)
		    this->_S_move(__p, __s, __len2);
		  else if (__s >= __p + __len1)
		    this->_S_copy(__p, __s + __len2 - __len1, __len2);
		  else
		    {
		      const size_type __nleft = (__p + __len1) - __s;
		      this->_S_move(__p, __s, __nleft);
		      this->_S_copy(__p + __nleft, __p + __len2,
				    __len2 - __nleft);
		    }
		}
	    }
	}
      else
	this->_M_mutate(__pos, __len1, __s, __len2);

      this->_M_set_length(__new_size);
      return *this;
    }
  
  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    {
      __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
      __str.reserve(__lhs.size() + __rhs.size());
      __str.append(__lhs);
      __str.append(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const _CharT* __lhs,
	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    {
      __glibcxx_requires_string(__lhs);
      typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
      typedef typename __string_type::size_type	  __size_type;
      const __size_type __len = _Traits::length(__lhs);
      __string_type __str;
      __str.reserve(__len + __rhs.size());
      __str.append(__lhs, __len);
      __str.append(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(_CharT __lhs,
	      const __versa_string<_CharT, _Traits, _Alloc, _Base>& __rhs)
    {
      __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
      __str.reserve(__rhs.size() + 1);
      __str.push_back(__lhs);
      __str.append(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
	      const _CharT* __rhs)
    {
      __glibcxx_requires_string(__rhs);
      typedef __versa_string<_CharT, _Traits, _Alloc, _Base> __string_type;
      typedef typename __string_type::size_type	  __size_type;
      const __size_type __len = _Traits::length(__rhs);
      __string_type __str;
      __str.reserve(__lhs.size() + __len);
      __str.append(__lhs);
      __str.append(__rhs, __len);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    __versa_string<_CharT, _Traits, _Alloc, _Base>
    operator+(const __versa_string<_CharT, _Traits, _Alloc, _Base>& __lhs,
	      _CharT __rhs)
    {
      __versa_string<_CharT, _Traits, _Alloc, _Base> __str;
      __str.reserve(__lhs.size() + 1);
      __str.append(__lhs);
      __str.push_back(__rhs);
      return __str;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    copy(_CharT* __s, size_type __n, size_type __pos) const
    {
      _M_check(__pos, "__versa_string::copy");
      __n = _M_limit(__pos, __n);
      __glibcxx_requires_string_len(__s, __n);
      if (__n)
	this->_S_copy(__s, this->_M_data() + __pos, __n);
      // 21.3.5.7 par 3: do not append null.  (good.)
      return __n;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      size_type __ret = npos;
      const size_type __size = this->size();
      if (__pos + __n <= __size)
	{
	  const _CharT* __data = this->_M_data();
	  const _CharT* __p = std::search(__data + __pos, __data + __size,
					  __s, __s + __n, traits_type::eq);
	  if (__p != __data + __size || __n == 0)
	    __ret = __p - __data;
	}
      return __ret;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find(_CharT __c, size_type __pos) const
    {
      size_type __ret = npos;
      const size_type __size = this->size();
      if (__pos < __size)
	{
	  const _CharT* __data = this->_M_data();
	  const size_type __n = __size - __pos;
	  const _CharT* __p = traits_type::find(__data + __pos, __n, __c);
	  if (__p)
	    __ret = __p - __data;
	}
      return __ret;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    rfind(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      const size_type __size = this->size();
      if (__n <= __size)
	{
	  __pos = std::min(size_type(__size - __n), __pos);
	  const _CharT* __data = this->_M_data();
	  do
	    {
	      if (traits_type::compare(__data + __pos, __s, __n) == 0)
		return __pos;
	    }
	  while (__pos-- > 0);
	}
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    rfind(_CharT __c, size_type __pos) const
    {
      size_type __size = this->size();
      if (__size)
	{
	  if (--__size > __pos)
	    __size = __pos;
	  for (++__size; __size-- > 0; )
	    if (traits_type::eq(this->_M_data()[__size], __c))
	      return __size;
	}
      return npos;
    }

  template<typename _CharT, typename _Traits, typename _Alloc,
	   template <typename, typename, typename> class _Base>
    typename __versa_string<_CharT, _Traits, _Alloc, _Base>::size_type
    __versa_string<_CharT, _Traits, _Alloc, _Base>::
    find_first_of(const _CharT* __s, size_type __pos, size_type __n) const
    {
      __glibcxx_requires_string_len(__s, __n);
      for (; __n && __pos < this->size(); ++__pos)
	{
	  const _CharT* __p = traits_type::find(__s, __n,
						this->_M_data()[__pos]);
	  if (__p)
	    return __pos;
	}
      return npos;