655 lines
22 KiB
C++
655 lines
22 KiB
C++
// Main templates for the -*- C++ -*- string classes.
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// Copyright (C) 1994, 1995, 1999 Free Software Foundation
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// This file is part of the GNU ANSI C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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// As a special exception, if you link this library with files
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// compiled with a GNU compiler to produce an executable, this does not cause
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// the resulting executable to be covered by the GNU General Public License.
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// This exception does not however invalidate any other reasons why
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// the executable file might be covered by the GNU General Public License.
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// Written by Jason Merrill based upon the specification by Takanori Adachi
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// in ANSI X3J16/94-0013R2.
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#ifndef __BASTRING__
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#define __BASTRING__
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#ifdef __GNUG__
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#pragma interface
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#endif
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#include <cstddef>
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#include <std/straits.h>
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// NOTE : This does NOT conform to the draft standard and is likely to change
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#include <alloc.h>
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extern "C++" {
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class istream; class ostream;
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#include <iterator>
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#ifdef __STL_USE_EXCEPTIONS
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extern void __out_of_range (const char *);
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extern void __length_error (const char *);
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#define OUTOFRANGE(cond) \
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do { if (cond) __out_of_range (#cond); } while (0)
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#define LENGTHERROR(cond) \
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do { if (cond) __length_error (#cond); } while (0)
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#else
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#include <cassert>
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#define OUTOFRANGE(cond) assert (!(cond))
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#define LENGTHERROR(cond) assert (!(cond))
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#endif
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template <class charT, class traits = string_char_traits<charT>,
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class Allocator = alloc >
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class basic_string
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{
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private:
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struct Rep {
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size_t len, res, ref;
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bool selfish;
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charT* data () { return reinterpret_cast<charT *>(this + 1); }
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charT& operator[] (size_t s) { return data () [s]; }
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charT* grab () { if (selfish) return clone (); ++ref; return data (); }
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#if defined __i486__ || defined __i586__ || defined __i686__
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void release ()
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{
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size_t __val;
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// This opcode exists as a .byte instead of as a mnemonic for the
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// benefit of SCO OpenServer 5. The system assembler (which is
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// essentially required on this target) can't assemble xaddl in
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//COFF mode.
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asm (".byte 0xf0, 0x0f, 0xc1, 0x02" // lock; xaddl %eax, (%edx)
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: "=a" (__val)
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: "0" (-1), "m" (ref), "d" (&ref)
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: "memory");
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if (__val == 1)
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delete this;
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}
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#elif defined __sparcv9__
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void release ()
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{
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size_t __newval, __oldval = ref;
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do
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{
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__newval = __oldval - 1;
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__asm__ ("cas [%4], %2, %0"
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: "=r" (__oldval), "=m" (ref)
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: "r" (__oldval), "m" (ref), "r"(&(ref)), "0" (__newval));
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}
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while (__newval != __oldval);
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if (__oldval == 0)
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delete this;
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}
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#else
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void release () { if (--ref == 0) delete this; }
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#endif
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inline static void * operator new (size_t, size_t);
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inline static void operator delete (void *);
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inline static Rep* create (size_t);
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charT* clone ();
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inline void copy (size_t, const charT *, size_t);
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inline void move (size_t, const charT *, size_t);
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inline void set (size_t, const charT, size_t);
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inline static bool excess_slop (size_t, size_t);
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inline static size_t frob_size (size_t);
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private:
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Rep &operator= (const Rep &);
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};
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public:
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// types:
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typedef traits traits_type;
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typedef typename traits::char_type value_type;
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typedef Allocator allocator_type;
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef charT& reference;
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typedef const charT& const_reference;
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typedef charT* pointer;
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typedef const charT* const_pointer;
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typedef pointer iterator;
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typedef const_pointer const_iterator;
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typedef ::reverse_iterator<iterator> reverse_iterator;
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typedef ::reverse_iterator<const_iterator> const_reverse_iterator;
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static const size_type npos = static_cast<size_type>(-1);
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private:
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Rep *rep () const { return reinterpret_cast<Rep *>(dat) - 1; }
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void repup (Rep *p) { rep ()->release (); dat = p->data (); }
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public:
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const charT* data () const
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{ return rep ()->data(); }
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size_type length () const
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{ return rep ()->len; }
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size_type size () const
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{ return rep ()->len; }
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size_type capacity () const
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{ return rep ()->res; }
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size_type max_size () const
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{ return (npos - 1)/sizeof (charT); } // XXX
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bool empty () const
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{ return size () == 0; }
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// _lib.string.cons_ construct/copy/destroy:
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basic_string& operator= (const basic_string& str)
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{
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if (&str != this) { rep ()->release (); dat = str.rep ()->grab (); }
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return *this;
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}
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explicit basic_string (): dat (nilRep.grab ()) { }
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basic_string (const basic_string& str): dat (str.rep ()->grab ()) { }
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basic_string (const basic_string& str, size_type pos, size_type n = npos)
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: dat (nilRep.grab ()) { assign (str, pos, n); }
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basic_string (const charT* s, size_type n)
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: dat (nilRep.grab ()) { assign (s, n); }
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basic_string (const charT* s)
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: dat (nilRep.grab ()) { assign (s); }
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basic_string (size_type n, charT c)
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: dat (nilRep.grab ()) { assign (n, c); }
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#ifdef __STL_MEMBER_TEMPLATES
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template<class InputIterator>
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basic_string(InputIterator __begin, InputIterator __end)
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#else
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basic_string(const_iterator __begin, const_iterator __end)
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#endif
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: dat (nilRep.grab ()) { assign (__begin, __end); }
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~basic_string ()
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{ rep ()->release (); }
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void swap (basic_string &s) { charT *d = dat; dat = s.dat; s.dat = d; }
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basic_string& append (const basic_string& str, size_type pos = 0,
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size_type n = npos)
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{ return replace (length (), 0, str, pos, n); }
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basic_string& append (const charT* s, size_type n)
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{ return replace (length (), 0, s, n); }
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basic_string& append (const charT* s)
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{ return append (s, traits::length (s)); }
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basic_string& append (size_type n, charT c)
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{ return replace (length (), 0, n, c); }
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#ifdef __STL_MEMBER_TEMPLATES
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template<class InputIterator>
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basic_string& append(InputIterator first, InputIterator last)
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#else
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basic_string& append(const_iterator first, const_iterator last)
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#endif
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{ return replace (iend (), iend (), first, last); }
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basic_string& assign (const basic_string& str, size_type pos = 0,
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size_type n = npos)
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{ return replace (0, npos, str, pos, n); }
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basic_string& assign (const charT* s, size_type n)
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{ return replace (0, npos, s, n); }
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basic_string& assign (const charT* s)
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{ return assign (s, traits::length (s)); }
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basic_string& assign (size_type n, charT c)
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{ return replace (0, npos, n, c); }
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#ifdef __STL_MEMBER_TEMPLATES
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template<class InputIterator>
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basic_string& assign(InputIterator first, InputIterator last)
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#else
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basic_string& assign(const_iterator first, const_iterator last)
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#endif
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{ return replace (ibegin (), iend (), first, last); }
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basic_string& operator= (const charT* s)
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{ return assign (s); }
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basic_string& operator= (charT c)
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{ return assign (1, c); }
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basic_string& operator+= (const basic_string& rhs)
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{ return append (rhs); }
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basic_string& operator+= (const charT* s)
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{ return append (s); }
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basic_string& operator+= (charT c)
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{ return append (1, c); }
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basic_string& insert (size_type pos1, const basic_string& str,
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size_type pos2 = 0, size_type n = npos)
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{ return replace (pos1, 0, str, pos2, n); }
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basic_string& insert (size_type pos, const charT* s, size_type n)
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{ return replace (pos, 0, s, n); }
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basic_string& insert (size_type pos, const charT* s)
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{ return insert (pos, s, traits::length (s)); }
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basic_string& insert (size_type pos, size_type n, charT c)
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{ return replace (pos, 0, n, c); }
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iterator insert(iterator p, charT c)
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{ size_type __o = p - ibegin ();
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insert (p - ibegin (), 1, c); selfish ();
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return ibegin () + __o; }
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iterator insert(iterator p, size_type n, charT c)
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{ size_type __o = p - ibegin ();
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insert (p - ibegin (), n, c); selfish ();
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return ibegin () + __o; }
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#ifdef __STL_MEMBER_TEMPLATES
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template<class InputIterator>
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void insert(iterator p, InputIterator first, InputIterator last)
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#else
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void insert(iterator p, const_iterator first, const_iterator last)
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#endif
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{ replace (p, p, first, last); }
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basic_string& erase (size_type pos = 0, size_type n = npos)
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{ return replace (pos, n, (size_type)0, (charT)0); }
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iterator erase(iterator p)
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{ size_type __o = p - begin();
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replace (__o, 1, (size_type)0, (charT)0); selfish ();
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return ibegin() + __o; }
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iterator erase(iterator f, iterator l)
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{ size_type __o = f - ibegin();
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replace (__o, l-f, (size_type)0, (charT)0);selfish ();
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return ibegin() + __o; }
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basic_string& replace (size_type pos1, size_type n1, const basic_string& str,
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size_type pos2 = 0, size_type n2 = npos);
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basic_string& replace (size_type pos, size_type n1, const charT* s,
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size_type n2);
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basic_string& replace (size_type pos, size_type n1, const charT* s)
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{ return replace (pos, n1, s, traits::length (s)); }
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basic_string& replace (size_type pos, size_type n1, size_type n2, charT c);
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basic_string& replace (size_type pos, size_type n, charT c)
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{ return replace (pos, n, 1, c); }
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basic_string& replace (iterator i1, iterator i2, const basic_string& str)
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{ return replace (i1 - ibegin (), i2 - i1, str); }
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basic_string& replace (iterator i1, iterator i2, const charT* s, size_type n)
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{ return replace (i1 - ibegin (), i2 - i1, s, n); }
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basic_string& replace (iterator i1, iterator i2, const charT* s)
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{ return replace (i1 - ibegin (), i2 - i1, s); }
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basic_string& replace (iterator i1, iterator i2, size_type n, charT c)
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{ return replace (i1 - ibegin (), i2 - i1, n, c); }
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#ifdef __STL_MEMBER_TEMPLATES
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template<class InputIterator>
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basic_string& replace(iterator i1, iterator i2,
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InputIterator j1, InputIterator j2);
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#else
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basic_string& replace(iterator i1, iterator i2,
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const_iterator j1, const_iterator j2);
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#endif
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private:
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static charT eos () { return traits::eos (); }
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void unique () { if (rep ()->ref > 1) alloc (length (), true); }
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void selfish () { unique (); rep ()->selfish = true; }
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public:
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charT operator[] (size_type pos) const
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{
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if (pos == length ())
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return eos ();
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return data ()[pos];
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}
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reference operator[] (size_type pos)
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{ selfish (); return (*rep ())[pos]; }
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reference at (size_type pos)
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{
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OUTOFRANGE (pos >= length ());
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return (*this)[pos];
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}
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const_reference at (size_type pos) const
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{
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OUTOFRANGE (pos >= length ());
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return data ()[pos];
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}
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private:
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void terminate () const
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{ traits::assign ((*rep ())[length ()], eos ()); }
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public:
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const charT* c_str () const
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{ if (length () == 0) return ""; terminate (); return data (); }
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void resize (size_type n, charT c);
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void resize (size_type n)
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{ resize (n, eos ()); }
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void reserve (size_type) { }
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size_type copy (charT* s, size_type n, size_type pos = 0) const;
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size_type find (const basic_string& str, size_type pos = 0) const
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{ return find (str.data(), pos, str.length()); }
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size_type find (const charT* s, size_type pos, size_type n) const;
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size_type find (const charT* s, size_type pos = 0) const
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{ return find (s, pos, traits::length (s)); }
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size_type find (charT c, size_type pos = 0) const;
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size_type rfind (const basic_string& str, size_type pos = npos) const
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{ return rfind (str.data(), pos, str.length()); }
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size_type rfind (const charT* s, size_type pos, size_type n) const;
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size_type rfind (const charT* s, size_type pos = npos) const
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{ return rfind (s, pos, traits::length (s)); }
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size_type rfind (charT c, size_type pos = npos) const;
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size_type find_first_of (const basic_string& str, size_type pos = 0) const
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{ return find_first_of (str.data(), pos, str.length()); }
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size_type find_first_of (const charT* s, size_type pos, size_type n) const;
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size_type find_first_of (const charT* s, size_type pos = 0) const
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{ return find_first_of (s, pos, traits::length (s)); }
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size_type find_first_of (charT c, size_type pos = 0) const
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{ return find (c, pos); }
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size_type find_last_of (const basic_string& str, size_type pos = npos) const
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{ return find_last_of (str.data(), pos, str.length()); }
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size_type find_last_of (const charT* s, size_type pos, size_type n) const;
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size_type find_last_of (const charT* s, size_type pos = npos) const
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{ return find_last_of (s, pos, traits::length (s)); }
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size_type find_last_of (charT c, size_type pos = npos) const
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{ return rfind (c, pos); }
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size_type find_first_not_of (const basic_string& str, size_type pos = 0) const
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{ return find_first_not_of (str.data(), pos, str.length()); }
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size_type find_first_not_of (const charT* s, size_type pos, size_type n) const;
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size_type find_first_not_of (const charT* s, size_type pos = 0) const
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{ return find_first_not_of (s, pos, traits::length (s)); }
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size_type find_first_not_of (charT c, size_type pos = 0) const;
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size_type find_last_not_of (const basic_string& str, size_type pos = npos) const
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{ return find_last_not_of (str.data(), pos, str.length()); }
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size_type find_last_not_of (const charT* s, size_type pos, size_type n) const;
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size_type find_last_not_of (const charT* s, size_type pos = npos) const
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{ return find_last_not_of (s, pos, traits::length (s)); }
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size_type find_last_not_of (charT c, size_type pos = npos) const;
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basic_string substr (size_type pos = 0, size_type n = npos) const
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{ return basic_string (*this, pos, n); }
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int compare (const basic_string& str, size_type pos = 0, size_type n = npos) const;
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// There is no 'strncmp' equivalent for charT pointers.
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int compare (const charT* s, size_type pos, size_type n) const;
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int compare (const charT* s, size_type pos = 0) const
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{ return compare (s, pos, traits::length (s)); }
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iterator begin () { selfish (); return &(*this)[0]; }
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iterator end () { selfish (); return &(*this)[length ()]; }
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private:
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iterator ibegin () const { return &(*rep ())[0]; }
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iterator iend () const { return &(*rep ())[length ()]; }
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public:
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const_iterator begin () const { return ibegin (); }
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const_iterator end () const { return iend (); }
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reverse_iterator rbegin() { return reverse_iterator (end ()); }
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const_reverse_iterator rbegin() const
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{ return const_reverse_iterator (end ()); }
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reverse_iterator rend() { return reverse_iterator (begin ()); }
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const_reverse_iterator rend() const
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{ return const_reverse_iterator (begin ()); }
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private:
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void alloc (size_type size, bool save);
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static size_type _find (const charT* ptr, charT c, size_type xpos, size_type len);
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inline bool check_realloc (size_type s) const;
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static Rep nilRep;
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charT *dat;
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};
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#ifdef __STL_MEMBER_TEMPLATES
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template <class charT, class traits, class Allocator> template <class InputIterator>
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basic_string <charT, traits, Allocator>& basic_string <charT, traits, Allocator>::
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replace (iterator i1, iterator i2, InputIterator j1, InputIterator j2)
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#else
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template <class charT, class traits, class Allocator>
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basic_string <charT, traits, Allocator>& basic_string <charT, traits, Allocator>::
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replace (iterator i1, iterator i2, const_iterator j1, const_iterator j2)
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#endif
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{
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const size_type len = length ();
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size_type pos = i1 - ibegin ();
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size_type n1 = i2 - i1;
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size_type n2 = j2 - j1;
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OUTOFRANGE (pos > len);
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if (n1 > len - pos)
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n1 = len - pos;
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LENGTHERROR (len - n1 > max_size () - n2);
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size_t newlen = len - n1 + n2;
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if (check_realloc (newlen))
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{
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Rep *p = Rep::create (newlen);
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p->copy (0, data (), pos);
|
|
p->copy (pos + n2, data () + pos + n1, len - (pos + n1));
|
|
for (; j1 != j2; ++j1, ++pos)
|
|
traits::assign ((*p)[pos], *j1);
|
|
repup (p);
|
|
}
|
|
else
|
|
{
|
|
rep ()->move (pos + n2, data () + pos + n1, len - (pos + n1));
|
|
for (; j1 != j2; ++j1, ++pos)
|
|
traits::assign ((*rep ())[pos], *j1);
|
|
}
|
|
rep ()->len = newlen;
|
|
|
|
return *this;
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline basic_string <charT, traits, Allocator>
|
|
operator+ (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
basic_string <charT, traits, Allocator> str (lhs);
|
|
str.append (rhs);
|
|
return str;
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline basic_string <charT, traits, Allocator>
|
|
operator+ (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
basic_string <charT, traits, Allocator> str (lhs);
|
|
str.append (rhs);
|
|
return str;
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline basic_string <charT, traits, Allocator>
|
|
operator+ (charT lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
basic_string <charT, traits, Allocator> str (1, lhs);
|
|
str.append (rhs);
|
|
return str;
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline basic_string <charT, traits, Allocator>
|
|
operator+ (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
basic_string <charT, traits, Allocator> str (lhs);
|
|
str.append (rhs);
|
|
return str;
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline basic_string <charT, traits, Allocator>
|
|
operator+ (const basic_string <charT, traits, Allocator>& lhs, charT rhs)
|
|
{
|
|
basic_string <charT, traits, Allocator> str (lhs);
|
|
str.append (1, rhs);
|
|
return str;
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator== (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (lhs.compare (rhs) == 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator== (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (rhs.compare (lhs) == 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator== (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
return (lhs.compare (rhs) == 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator!= (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (rhs.compare (lhs) != 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator!= (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
return (lhs.compare (rhs) != 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator< (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (lhs.compare (rhs) < 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator< (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (rhs.compare (lhs) > 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator< (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
return (lhs.compare (rhs) < 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator> (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (rhs.compare (lhs) < 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator> (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
return (lhs.compare (rhs) > 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator<= (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (rhs.compare (lhs) >= 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator<= (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
return (lhs.compare (rhs) <= 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator>= (const charT* lhs, const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (rhs.compare (lhs) <= 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator>= (const basic_string <charT, traits, Allocator>& lhs, const charT* rhs)
|
|
{
|
|
return (lhs.compare (rhs) >= 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator!= (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (lhs.compare (rhs) != 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator> (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (lhs.compare (rhs) > 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator<= (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (lhs.compare (rhs) <= 0);
|
|
}
|
|
|
|
template <class charT, class traits, class Allocator>
|
|
inline bool
|
|
operator>= (const basic_string <charT, traits, Allocator>& lhs,
|
|
const basic_string <charT, traits, Allocator>& rhs)
|
|
{
|
|
return (lhs.compare (rhs) >= 0);
|
|
}
|
|
|
|
class istream; class ostream;
|
|
template <class charT, class traits, class Allocator> istream&
|
|
operator>> (istream&, basic_string <charT, traits, Allocator>&);
|
|
template <class charT, class traits, class Allocator> ostream&
|
|
operator<< (ostream&, const basic_string <charT, traits, Allocator>&);
|
|
template <class charT, class traits, class Allocator> istream&
|
|
getline (istream&, basic_string <charT, traits, Allocator>&, charT delim = '\n');
|
|
|
|
} // extern "C++"
|
|
|
|
#include <std/bastring.cc>
|
|
|
|
#endif
|