NetBSD/gnu/dist/libstdc++/std/bastring.cc

525 lines
13 KiB
C++

// Member templates for the -*- C++ -*- string classes.
// Copyright (C) 1994 Free Software Foundation
// This file is part of the GNU ANSI 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
// As a special exception, if you link this library with files
// compiled with a GNU compiler to produce an executable, this does not 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.
// Written by Jason Merrill based upon the specification by Takanori Adachi
// in ANSI X3J16/94-0013R2.
extern "C++" {
template <class charT, class traits, class Allocator>
inline void * basic_string <charT, traits, Allocator>::Rep::
operator new (size_t s, size_t extra)
{
return Allocator::allocate(s + extra * sizeof (charT));
}
template <class charT, class traits, class Allocator>
inline void basic_string <charT, traits, Allocator>::Rep::
operator delete (void * ptr)
{
Allocator::deallocate(ptr, sizeof(Rep) +
reinterpret_cast<Rep *>(ptr)->res *
sizeof (charT));
}
template <class charT, class traits, class Allocator>
inline size_t basic_string <charT, traits, Allocator>::Rep::
frob_size (size_t s)
{
size_t i = 16;
while (i < s) i *= 2;
return i;
}
template <class charT, class traits, class Allocator>
inline basic_string <charT, traits, Allocator>::Rep *
basic_string <charT, traits, Allocator>::Rep::
create (size_t extra)
{
extra = frob_size (extra + 1);
Rep *p = new (extra) Rep;
p->res = extra;
p->ref = 1;
p->selfish = false;
return p;
}
template <class charT, class traits, class Allocator>
charT * basic_string <charT, traits, Allocator>::Rep::
clone ()
{
Rep *p = Rep::create (len);
p->copy (0, data (), len);
p->len = len;
return p->data ();
}
template <class charT, class traits, class Allocator>
inline bool basic_string <charT, traits, Allocator>::Rep::
excess_slop (size_t s, size_t r)
{
return 2 * (s <= 16 ? 16 : s) < r;
}
template <class charT, class traits, class Allocator>
inline bool basic_string <charT, traits, Allocator>::
check_realloc (basic_string::size_type s) const
{
s += sizeof (charT);
rep ()->selfish = false;
return (rep ()->ref > 1
|| s > capacity ()
|| Rep::excess_slop (s, capacity ()));
}
template <class charT, class traits, class Allocator>
void basic_string <charT, traits, Allocator>::
alloc (basic_string::size_type size, bool save)
{
if (! check_realloc (size))
return;
Rep *p = Rep::create (size);
if (save)
{
p->copy (0, data (), length ());
p->len = length ();
}
else
p->len = 0;
repup (p);
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>&
basic_string <charT, traits, Allocator>::
replace (size_type pos1, size_type n1,
const basic_string& str, size_type pos2, size_type n2)
{
const size_t len2 = str.length ();
if (pos1 == 0 && n1 >= length () && pos2 == 0 && n2 >= len2)
return operator= (str);
OUTOFRANGE (pos2 > len2);
if (n2 > len2 - pos2)
n2 = len2 - pos2;
return replace (pos1, n1, str.data () + pos2, n2);
}
template <class charT, class traits, class Allocator>
inline void basic_string <charT, traits, Allocator>::Rep::
copy (size_t pos, const charT *s, size_t n)
{
if (n)
traits::copy (data () + pos, s, n);
}
template <class charT, class traits, class Allocator>
inline void basic_string <charT, traits, Allocator>::Rep::
move (size_t pos, const charT *s, size_t n)
{
if (n)
traits::move (data () + pos, s, n);
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>&
basic_string <charT, traits, Allocator>::
replace (size_type pos, size_type n1, const charT* s, size_type n2)
{
const size_type len = length ();
OUTOFRANGE (pos > len);
if (n1 > len - pos)
n1 = len - pos;
LENGTHERROR (len - n1 > max_size () - n2);
size_t newlen = len - n1 + n2;
if (check_realloc (newlen))
{
Rep *p = Rep::create (newlen);
p->copy (0, data (), pos);
p->copy (pos + n2, data () + pos + n1, len - (pos + n1));
p->copy (pos, s, n2);
repup (p);
}
else
{
rep ()->move (pos + n2, data () + pos + n1, len - (pos + n1));
rep ()->copy (pos, s, n2);
}
rep ()->len = newlen;
return *this;
}
template <class charT, class traits, class Allocator>
inline void basic_string <charT, traits, Allocator>::Rep::
set (size_t pos, const charT c, size_t n)
{
traits::set (data () + pos, c, n);
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>& basic_string <charT, traits, Allocator>::
replace (size_type pos, size_type n1, size_type n2, charT c)
{
const size_t len = length ();
OUTOFRANGE (pos > len);
if (n1 > len - pos)
n1 = len - pos;
LENGTHERROR (len - n1 > max_size () - n2);
size_t newlen = len - n1 + n2;
if (check_realloc (newlen))
{
Rep *p = Rep::create (newlen);
p->copy (0, data (), pos);
p->copy (pos + n2, data () + pos + n1, len - (pos + n1));
p->set (pos, c, n2);
repup (p);
}
else
{
rep ()->move (pos + n2, data () + pos + n1, len - (pos + n1));
rep ()->set (pos, c, n2);
}
rep ()->len = newlen;
return *this;
}
template <class charT, class traits, class Allocator>
void basic_string <charT, traits, Allocator>::
resize (size_type n, charT c)
{
LENGTHERROR (n > max_size ());
if (n > length ())
append (n - length (), c);
else
erase (n);
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
copy (charT* s, size_type n, size_type pos) const
{
OUTOFRANGE (pos > length ());
if (n > length () - pos)
n = length () - pos;
traits::copy (s, data () + pos, n);
return n;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find (const charT* s, size_type pos, size_type n) const
{
size_t xpos = pos;
for (; xpos + n <= length (); ++xpos)
if (traits::eq (data () [xpos], *s)
&& traits::compare (data () + xpos, s, n) == 0)
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
inline basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
_find (const charT* ptr, charT c, size_type xpos, size_type len)
{
for (; xpos < len; ++xpos)
if (traits::eq (ptr [xpos], c))
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find (charT c, size_type pos) const
{
return _find (data (), c, pos, length ());
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
rfind (const charT* s, size_type pos, size_type n) const
{
if (n > length ())
return npos;
size_t xpos = length () - n;
if (xpos > pos)
xpos = pos;
for (++xpos; xpos-- > 0; )
if (traits::eq (data () [xpos], *s)
&& traits::compare (data () + xpos, s, n) == 0)
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
rfind (charT c, size_type pos) const
{
if (1 > length ())
return npos;
size_t xpos = length () - 1;
if (xpos > pos)
xpos = pos;
for (++xpos; xpos-- > 0; )
if (traits::eq (data () [xpos], c))
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find_first_of (const charT* s, size_type pos, size_type n) const
{
size_t xpos = pos;
for (; xpos < length (); ++xpos)
if (_find (s, data () [xpos], 0, n) != npos)
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find_last_of (const charT* s, size_type pos, size_type n) const
{
if (length() == 0)
return npos;
size_t xpos = length () - 1;
if (xpos > pos)
xpos = pos;
for (++xpos; xpos-- > 0;)
if (_find (s, data () [xpos], 0, n) != npos)
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find_first_not_of (const charT* s, size_type pos, size_type n) const
{
size_t xpos = pos;
for (; xpos < length (); ++xpos)
if (_find (s, data () [xpos], 0, n) == npos)
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find_first_not_of (charT c, size_type pos) const
{
size_t xpos = pos;
for (; xpos < length (); ++xpos)
if (traits::ne (data () [xpos], c))
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find_last_not_of (const charT* s, size_type pos, size_type n) const
{
if (length() == 0)
return npos;
size_t xpos = length () - 1;
if (xpos > pos)
xpos = pos;
for (++xpos; xpos-- > 0;)
if (_find (s, data () [xpos], 0, n) == npos)
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::
find_last_not_of (charT c, size_type pos) const
{
if (length() == 0)
return npos;
size_t xpos = length () - 1;
if (xpos > pos)
xpos = pos;
for (++xpos; xpos-- > 0;)
if (traits::ne (data () [xpos], c))
return xpos;
return npos;
}
template <class charT, class traits, class Allocator>
int basic_string <charT, traits, Allocator>::
compare (const basic_string& str, size_type pos, size_type n) const
{
OUTOFRANGE (pos > length ());
size_t rlen = length () - pos;
if (rlen > n)
rlen = n;
if (rlen > str.length ())
rlen = str.length ();
int r = traits::compare (data () + pos, str.data (), rlen);
if (r != 0)
return r;
if (rlen == n)
return 0;
return (length () - pos) - str.length ();
}
template <class charT, class traits, class Allocator>
int basic_string <charT, traits, Allocator>::
compare (const charT* s, size_type pos, size_type n) const
{
OUTOFRANGE (pos > length ());
size_t rlen = length () - pos;
if (rlen > n)
rlen = n;
int r = traits::compare (data () + pos, s, rlen);
if (r != 0)
return r;
return (length () - pos) - n;
}
#include <iostream.h>
template <class charT, class traits, class Allocator>
istream &
operator>> (istream &is, basic_string <charT, traits, Allocator> &s)
{
int w = is.width (0);
if (is.ipfx0 ())
{
register streambuf *sb = is.rdbuf ();
s.resize (0);
while (1)
{
int ch = sb->sbumpc ();
if (ch == EOF)
{
is.setstate (ios::eofbit);
break;
}
else if (traits::is_del (ch))
{
sb->sungetc ();
break;
}
s += ch;
if (--w == 1)
break;
}
}
is.isfx ();
if (s.length () == 0)
is.setstate (ios::failbit);
return is;
}
template <class charT, class traits, class Allocator>
ostream &
operator<< (ostream &o, const basic_string <charT, traits, Allocator>& s)
{
return o.write (s.data (), s.length ());
}
template <class charT, class traits, class Allocator>
istream&
getline (istream &is, basic_string <charT, traits, Allocator>& s, charT delim)
{
if (is.ipfx1 ())
{
_IO_size_t count = 0;
streambuf *sb = is.rdbuf ();
s.resize (0);
while (1)
{
int ch = sb->sbumpc ();
if (ch == EOF)
{
is.setstate (count == 0
? (ios::failbit|ios::eofbit)
: ios::eofbit);
break;
}
++count;
if (ch == delim)
break;
s += ch;
if (s.length () == s.npos - 1)
{
is.setstate (ios::failbit);
break;
}
}
}
// We need to be friends with istream to do this.
// is._gcount = count;
is.isfx ();
return is;
}
template <class charT, class traits, class Allocator>
basic_string <charT, traits, Allocator>::Rep
basic_string<charT, traits, Allocator>::nilRep = { 0, 0, 1, false };
template <class charT, class traits, class Allocator>
const basic_string <charT, traits, Allocator>::size_type
basic_string <charT, traits, Allocator>::npos;
} // extern "C++"