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Diffstat (limited to 'contrib/libstdc++/stl/ropeimpl.h')
| -rw-r--r-- | contrib/libstdc++/stl/ropeimpl.h | 1550 |
1 files changed, 0 insertions, 1550 deletions
diff --git a/contrib/libstdc++/stl/ropeimpl.h b/contrib/libstdc++/stl/ropeimpl.h deleted file mode 100644 index 18bb2c9..0000000 --- a/contrib/libstdc++/stl/ropeimpl.h +++ /dev/null @@ -1,1550 +0,0 @@ -/* - * Copyright (c) 1997 - * Silicon Graphics Computer Systems, Inc. - * - * Permission to use, copy, modify, distribute and sell this software - * and its documentation for any purpose is hereby granted without fee, - * provided that the above copyright notice appear in all copies and - * that both that copyright notice and this permission notice appear - * in supporting documentation. Silicon Graphics makes no - * representations about the suitability of this software for any - * purpose. It is provided "as is" without express or implied warranty. - */ - -/* NOTE: This is an internal header file, included by other STL headers. - * You should not attempt to use it directly. - */ - -# include <stdio.h> /* XXX should use <cstdio> */ -# include <iostream.h> /* XXX should use <iostream> */ - -__STL_BEGIN_NAMESPACE - -#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32) -#pragma set woff 1174 -#endif - -// Set buf_start, buf_end, and buf_ptr appropriately, filling tmp_buf -// if necessary. Assumes _M_path_end[leaf_index] and leaf_pos are correct. -// Results in a valid buf_ptr if the iterator can be legitimately -// dereferenced. -template <class _CharT, class _Alloc> -void _Rope_iterator_base<_CharT,_Alloc>::_S_setbuf( - _Rope_iterator_base<_CharT,_Alloc>& __x) -{ - const _RopeRep* __leaf = __x._M_path_end[__x._M_leaf_index]; - size_t __leaf_pos = __x._M_leaf_pos; - size_t __pos = __x._M_current_pos; - - switch(__leaf->_M_tag) { - case _RopeRep::_S_leaf: - __x._M_buf_start = - ((_Rope_RopeLeaf<_CharT,_Alloc>*)__leaf)->_M_data; - __x._M_buf_ptr = __x._M_buf_start + (__pos - __leaf_pos); - __x._M_buf_end = __x._M_buf_start + __leaf->_M_size; - break; - case _RopeRep::_S_function: - case _RopeRep::_S_substringfn: - { - size_t __len = _S_iterator_buf_len; - size_t __buf_start_pos = __leaf_pos; - size_t __leaf_end = __leaf_pos + __leaf->_M_size; - char_producer<_CharT>* __fn = - ((_Rope_RopeFunction<_CharT,_Alloc>*)__leaf)->_M_fn; - - if (__buf_start_pos + __len <= __pos) { - __buf_start_pos = __pos - __len/4; - if (__buf_start_pos + __len > __leaf_end) { - __buf_start_pos = __leaf_end - __len; - } - } - if (__buf_start_pos + __len > __leaf_end) { - __len = __leaf_end - __buf_start_pos; - } - (*__fn)(__buf_start_pos - __leaf_pos, __len, __x._M_tmp_buf); - __x._M_buf_ptr = __x._M_tmp_buf + (__pos - __buf_start_pos); - __x._M_buf_start = __x._M_tmp_buf; - __x._M_buf_end = __x._M_tmp_buf + __len; - } - break; - default: - __stl_assert(0); - } -} - -// Set path and buffer inside a rope iterator. We assume that -// pos and root are already set. -template <class _CharT, class _Alloc> -void _Rope_iterator_base<_CharT,_Alloc>::_S_setcache -(_Rope_iterator_base<_CharT,_Alloc>& __x) -{ - const _RopeRep* __path[_RopeRep::_S_max_rope_depth+1]; - const _RopeRep* __curr_rope; - int __curr_depth = -1; /* index into path */ - size_t __curr_start_pos = 0; - size_t __pos = __x._M_current_pos; - unsigned char __dirns = 0; // Bit vector marking right turns in the path - - __stl_assert(__pos <= __x._M_root->_M_size); - if (__pos >= __x._M_root->_M_size) { - __x._M_buf_ptr = 0; - return; - } - __curr_rope = __x._M_root; - if (0 != __curr_rope->_M_c_string) { - /* Treat the root as a leaf. */ - __x._M_buf_start = __curr_rope->_M_c_string; - __x._M_buf_end = __curr_rope->_M_c_string + __curr_rope->_M_size; - __x._M_buf_ptr = __curr_rope->_M_c_string + __pos; - __x._M_path_end[0] = __curr_rope; - __x._M_leaf_index = 0; - __x._M_leaf_pos = 0; - return; - } - for(;;) { - ++__curr_depth; - __stl_assert(__curr_depth <= _RopeRep::_S_max_rope_depth); - __path[__curr_depth] = __curr_rope; - switch(__curr_rope->_M_tag) { - case _RopeRep::_S_leaf: - case _RopeRep::_S_function: - case _RopeRep::_S_substringfn: - __x._M_leaf_pos = __curr_start_pos; - goto done; - case _RopeRep::_S_concat: - { - _Rope_RopeConcatenation<_CharT,_Alloc>* __c = - (_Rope_RopeConcatenation<_CharT,_Alloc>*)__curr_rope; - _RopeRep* __left = __c->_M_left; - size_t __left_len = __left->_M_size; - - __dirns <<= 1; - if (__pos >= __curr_start_pos + __left_len) { - __dirns |= 1; - __curr_rope = __c->_M_right; - __curr_start_pos += __left_len; - } else { - __curr_rope = __left; - } - } - break; - } - } - done: - // Copy last section of path into _M_path_end. - { - int __i = -1; - int __j = __curr_depth + 1 - _S_path_cache_len; - - if (__j < 0) __j = 0; - while (__j <= __curr_depth) { - __x._M_path_end[++__i] = __path[__j++]; - } - __x._M_leaf_index = __i; - } - __x._M_path_directions = __dirns; - _S_setbuf(__x); -} - -// Specialized version of the above. Assumes that -// the path cache is valid for the previous position. -template <class _CharT, class _Alloc> -void _Rope_iterator_base<_CharT,_Alloc>::_S_setcache_for_incr -(_Rope_iterator_base<_CharT,_Alloc>& __x) -{ - int __current_index = __x._M_leaf_index; - const _RopeRep* __current_node = __x._M_path_end[__current_index]; - size_t __len = __current_node->_M_size; - size_t __node_start_pos = __x._M_leaf_pos; - unsigned char __dirns = __x._M_path_directions; - _Rope_RopeConcatenation<_CharT,_Alloc>* __c; - - __stl_assert(__x._M_current_pos <= __x._M_root->_M_size); - if (__x._M_current_pos - __node_start_pos < __len) { - /* More stuff in this leaf, we just didn't cache it. */ - _S_setbuf(__x); - return; - } - __stl_assert(__node_start_pos + __len == __x._M_current_pos); - // node_start_pos is starting position of last_node. - while (--__current_index >= 0) { - if (!(__dirns & 1) /* Path turned left */) - break; - __current_node = __x._M_path_end[__current_index]; - __c = (_Rope_RopeConcatenation<_CharT,_Alloc>*)__current_node; - // Otherwise we were in the right child. Thus we should pop - // the concatenation node. - __node_start_pos -= __c->_M_left->_M_size; - __dirns >>= 1; - } - if (__current_index < 0) { - // We underflowed the cache. Punt. - _S_setcache(__x); - return; - } - __current_node = __x._M_path_end[__current_index]; - __c = (_Rope_RopeConcatenation<_CharT,_Alloc>*)__current_node; - // current_node is a concatenation node. We are positioned on the first - // character in its right child. - // node_start_pos is starting position of current_node. - __node_start_pos += __c->_M_left->_M_size; - __current_node = __c->_M_right; - __x._M_path_end[++__current_index] = __current_node; - __dirns |= 1; - while (_RopeRep::_S_concat == __current_node->_M_tag) { - ++__current_index; - if (_S_path_cache_len == __current_index) { - int __i; - for (__i = 0; __i < _S_path_cache_len-1; __i++) { - __x._M_path_end[__i] = __x._M_path_end[__i+1]; - } - --__current_index; - } - __current_node = - ((_Rope_RopeConcatenation<_CharT,_Alloc>*)__current_node)->_M_left; - __x._M_path_end[__current_index] = __current_node; - __dirns <<= 1; - // node_start_pos is unchanged. - } - __x._M_leaf_index = __current_index; - __x._M_leaf_pos = __node_start_pos; - __x._M_path_directions = __dirns; - _S_setbuf(__x); -} - -template <class _CharT, class _Alloc> -void _Rope_iterator_base<_CharT,_Alloc>::_M_incr(size_t __n) { - _M_current_pos += __n; - if (0 != _M_buf_ptr) { - size_t __chars_left = _M_buf_end - _M_buf_ptr; - if (__chars_left > __n) { - _M_buf_ptr += __n; - } else if (__chars_left == __n) { - _M_buf_ptr += __n; - _S_setcache_for_incr(*this); - } else { - _M_buf_ptr = 0; - } - } -} - -template <class _CharT, class _Alloc> -void _Rope_iterator_base<_CharT,_Alloc>::_M_decr(size_t __n) { - if (0 != _M_buf_ptr) { - size_t __chars_left = _M_buf_ptr - _M_buf_start; - if (__chars_left >= __n) { - _M_buf_ptr -= __n; - } else { - _M_buf_ptr = 0; - } - } - _M_current_pos -= __n; -} - -template <class _CharT, class _Alloc> -void _Rope_iterator<_CharT,_Alloc>::_M_check() { - if (_M_root_rope->_M_tree_ptr != _M_root) { - // _Rope was modified. Get things fixed up. - _RopeRep::_S_unref(_M_root); - _M_root = _M_root_rope->_M_tree_ptr; - _RopeRep::_S_ref(_M_root); - _M_buf_ptr = 0; - } -} - -template <class _CharT, class _Alloc> -inline -_Rope_const_iterator<_CharT, _Alloc>::_Rope_const_iterator( - const _Rope_iterator<_CharT,_Alloc>& __x) -: _Rope_iterator_base<_CharT,_Alloc>(__x) -{ } - -template <class _CharT, class _Alloc> -inline _Rope_iterator<_CharT,_Alloc>::_Rope_iterator( - rope<_CharT,_Alloc>& __r, size_t __pos) -: _Rope_iterator_base<_CharT,_Alloc>(__r._M_tree_ptr, __pos), - _M_root_rope(&__r) -{ - _RopeRep::_S_ref(_M_root); -} - -template <class _CharT, class _Alloc> -inline size_t -rope<_CharT,_Alloc>::_S_char_ptr_len(const _CharT* __s) -{ - const _CharT* __p = __s; - - while (!_S_is0(*__p)) { ++__p; } - return (__p - __s); -} - - -#ifndef __GC - -template <class _CharT, class _Alloc> -inline void _Rope_RopeRep<_CharT,_Alloc>::_M_free_c_string() -{ - _CharT* __cstr = _M_c_string; - if (0 != __cstr) { - size_t __size = _M_size + 1; - destroy(__cstr, __cstr + __size); - _Data_deallocate(__cstr, __size); - } -} - - -template <class _CharT, class _Alloc> -#ifdef __STL_USE_STD_ALLOCATORS - inline void _Rope_RopeRep<_CharT,_Alloc>::_S_free_string(_CharT* __s, - size_t __n, - allocator_type __a) -#else - inline void _Rope_RopeRep<_CharT,_Alloc>::_S_free_string(_CharT* __s, - size_t __n) -#endif -{ - if (!_S_is_basic_char_type((_CharT*)0)) { - destroy(__s, __s + __n); - } -// This has to be a static member, so this gets a bit messy -# ifdef __STL_USE_STD_ALLOCATORS - __a.deallocate( - __s, _Rope_RopeLeaf<_CharT,_Alloc>::_S_rounded_up_size(__n)); -# else - _Data_deallocate( - __s, _Rope_RopeLeaf<_CharT,_Alloc>::_S_rounded_up_size(__n)); -# endif -} - - -// There are several reasons for not doing this with virtual destructors -// and a class specific delete operator: -// - A class specific delete operator can't easily get access to -// allocator instances if we need them. -// - Any virtual function would need a 4 or byte vtable pointer; -// this only requires a one byte tag per object. -template <class _CharT, class _Alloc> -void _Rope_RopeRep<_CharT,_Alloc>::_M_free_tree() -{ - switch(_M_tag) { - case _S_leaf: - { - _Rope_RopeLeaf<_CharT,_Alloc>* __l - = (_Rope_RopeLeaf<_CharT,_Alloc>*)this; - __l->_Rope_RopeLeaf<_CharT,_Alloc>::~_Rope_RopeLeaf(); - _L_deallocate(__l, 1); - break; - } - case _S_concat: - { - _Rope_RopeConcatenation<_CharT,_Alloc>* __c - = (_Rope_RopeConcatenation<_CharT,_Alloc>*)this; - __c->_Rope_RopeConcatenation<_CharT,_Alloc>:: - ~_Rope_RopeConcatenation(); - _C_deallocate(__c, 1); - break; - } - case _S_function: - { - _Rope_RopeFunction<_CharT,_Alloc>* __f - = (_Rope_RopeFunction<_CharT,_Alloc>*)this; - __f->_Rope_RopeFunction<_CharT,_Alloc>::~_Rope_RopeFunction(); - _F_deallocate(__f, 1); - break; - } - case _S_substringfn: - { - _Rope_RopeSubstring<_CharT,_Alloc>* __ss = - (_Rope_RopeSubstring<_CharT,_Alloc>*)this; - __ss->_Rope_RopeSubstring<_CharT,_Alloc>:: - ~_Rope_RopeSubstring(); - _S_deallocate(__ss, 1); - break; - } - } -} -#else - -template <class _CharT, class _Alloc> -#ifdef __STL_USE_STD_ALLOCATORS - inline void _Rope_RopeRep<_CharT,_Alloc>::_S_free_string - (const _CharT*, size_t, allocator_type) -#else - inline void _Rope_RopeRep<_CharT,_Alloc>::_S_free_string - (const _CharT*, size_t) -#endif -{} - -#endif - - -// Concatenate a C string onto a leaf rope by copying the rope data. -// Used for short ropes. -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeLeaf* -rope<_CharT,_Alloc>::_S_leaf_concat_char_iter - (_RopeLeaf* __r, const _CharT* __iter, size_t __len) -{ - size_t __old_len = __r->_M_size; - _CharT* __new_data = (_CharT*) - _Data_allocate(_S_rounded_up_size(__old_len + __len)); - _RopeLeaf* __result; - - uninitialized_copy_n(__r->_M_data, __old_len, __new_data); - uninitialized_copy_n(__iter, __len, __new_data + __old_len); - _S_cond_store_eos(__new_data[__old_len + __len]); - __STL_TRY { - __result = _S_new_RopeLeaf(__new_data, __old_len + __len, - __r->get_allocator()); - } - __STL_UNWIND(_RopeRep::__STL_FREE_STRING(__new_data, __old_len + __len, - __r->get_allocator())); - return __result; -} - -#ifndef __GC -// As above, but it's OK to clobber original if refcount is 1 -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeLeaf* -rope<_CharT,_Alloc>::_S_destr_leaf_concat_char_iter - (_RopeLeaf* __r, const _CharT* __iter, size_t __len) -{ - __stl_assert(__r->_M_refcount >= 1); - if (__r->_M_refcount > 1) - return _S_leaf_concat_char_iter(__r, __iter, __len); - size_t __old_len = __r->_M_size; - if (_S_allocated_capacity(__old_len) >= __old_len + __len) { - // The space has been partially initialized for the standard - // character types. But that doesn't matter for those types. - uninitialized_copy_n(__iter, __len, __r->_M_data + __old_len); - if (_S_is_basic_char_type((_CharT*)0)) { - _S_cond_store_eos(__r->_M_data[__old_len + __len]); - __stl_assert(__r->_M_c_string == __r->_M_data); - } else if (__r->_M_c_string != __r->_M_data && 0 != __r->_M_c_string) { - __r->_M_free_c_string(); - __r->_M_c_string = 0; - } - __r->_M_size = __old_len + __len; - __stl_assert(__r->_M_refcount == 1); - __r->_M_refcount = 2; - return __r; - } else { - _RopeLeaf* __result = _S_leaf_concat_char_iter(__r, __iter, __len); - __stl_assert(__result->_M_refcount == 1); - return __result; - } -} -#endif - -// Assumes left and right are not 0. -// Does not increment (nor decrement on exception) child reference counts. -// Result has ref count 1. -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeRep* -rope<_CharT,_Alloc>::_S_tree_concat (_RopeRep* __left, _RopeRep* __right) -{ - _RopeConcatenation* __result = - _S_new_RopeConcatenation(__left, __right, __left->get_allocator()); - size_t __depth = __result->_M_depth; - -# ifdef __STL_USE_STD_ALLOCATORS - __stl_assert(__left->get_allocator() == __right->get_allocator()); -# endif - if (__depth > 20 && (__result->_M_size < 1000 || - __depth > _RopeRep::_S_max_rope_depth)) { - _RopeRep* __balanced; - - __STL_TRY { - __balanced = _S_balance(__result); -# ifndef __GC - if (__result != __balanced) { - __stl_assert(1 == __result->_M_refcount - && 1 == __balanced->_M_refcount); - } -# endif - __result->_M_unref_nonnil(); - } - __STL_UNWIND((_C_deallocate(__result,1))); - // In case of exception, we need to deallocate - // otherwise dangling result node. But caller - // still owns its children. Thus unref is - // inappropriate. - return __balanced; - } else { - return __result; - } -} - -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeRep* rope<_CharT,_Alloc>::_S_concat_char_iter - (_RopeRep* __r, const _CharT*__s, size_t __slen) -{ - _RopeRep* __result; - if (0 == __slen) { - _S_ref(__r); - return __r; - } - if (0 == __r) - return __STL_ROPE_FROM_UNOWNED_CHAR_PTR(__s, __slen, - __r->get_allocator()); - if (_RopeRep::_S_leaf == __r->_M_tag && - __r->_M_size + __slen <= _S_copy_max) { - __result = _S_leaf_concat_char_iter((_RopeLeaf*)__r, __s, __slen); -# ifndef __GC - __stl_assert(1 == __result->_M_refcount); -# endif - return __result; - } - if (_RopeRep::_S_concat == __r->_M_tag - && _RopeRep::_S_leaf == ((_RopeConcatenation*)__r)->_M_right->_M_tag) { - _RopeLeaf* __right = - (_RopeLeaf* )(((_RopeConcatenation* )__r)->_M_right); - if (__right->_M_size + __slen <= _S_copy_max) { - _RopeRep* __left = ((_RopeConcatenation*)__r)->_M_left; - _RopeRep* __nright = - _S_leaf_concat_char_iter((_RopeLeaf*)__right, __s, __slen); - __left->_M_ref_nonnil(); - __STL_TRY { - __result = _S_tree_concat(__left, __nright); - } - __STL_UNWIND(_S_unref(__left); _S_unref(__nright)); -# ifndef __GC - __stl_assert(1 == __result->_M_refcount); -# endif - return __result; - } - } - _RopeRep* __nright = - __STL_ROPE_FROM_UNOWNED_CHAR_PTR(__s, __slen, __r->get_allocator()); - __STL_TRY { - __r->_M_ref_nonnil(); - __result = _S_tree_concat(__r, __nright); - } - __STL_UNWIND(_S_unref(__r); _S_unref(__nright)); -# ifndef __GC - __stl_assert(1 == __result->_M_refcount); -# endif - return __result; -} - -#ifndef __GC -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeRep* -rope<_CharT,_Alloc>::_S_destr_concat_char_iter( - _RopeRep* __r, const _CharT* __s, size_t __slen) -{ - _RopeRep* __result; - if (0 == __r) - return __STL_ROPE_FROM_UNOWNED_CHAR_PTR(__s, __slen, - __r->get_allocator()); - size_t __count = __r->_M_refcount; - size_t __orig_size = __r->_M_size; - __stl_assert(__count >= 1); - if (__count > 1) return _S_concat_char_iter(__r, __s, __slen); - if (0 == __slen) { - __r->_M_refcount = 2; // One more than before - return __r; - } - if (__orig_size + __slen <= _S_copy_max && - _RopeRep::_S_leaf == __r->_M_tag) { - __result = _S_destr_leaf_concat_char_iter((_RopeLeaf*)__r, __s, __slen); - return __result; - } - if (_RopeRep::_S_concat == __r->_M_tag) { - _RopeLeaf* __right = (_RopeLeaf*)(((_RopeConcatenation*)__r)->_M_right); - if (_RopeRep::_S_leaf == __right->_M_tag - && __right->_M_size + __slen <= _S_copy_max) { - _RopeRep* __new_right = - _S_destr_leaf_concat_char_iter(__right, __s, __slen); - if (__right == __new_right) { - __stl_assert(__new_right->_M_refcount == 2); - __new_right->_M_refcount = 1; - } else { - __stl_assert(__new_right->_M_refcount >= 1); - __right->_M_unref_nonnil(); - } - __stl_assert(__r->_M_refcount == 1); - __r->_M_refcount = 2; // One more than before. - ((_RopeConcatenation*)__r)->_M_right = __new_right; - __r->_M_size = __orig_size + __slen; - if (0 != __r->_M_c_string) { - __r->_M_free_c_string(); - __r->_M_c_string = 0; - } - return __r; - } - } - _RopeRep* __right = - __STL_ROPE_FROM_UNOWNED_CHAR_PTR(__s, __slen, __r->get_allocator()); - __r->_M_ref_nonnil(); - __STL_TRY { - __result = _S_tree_concat(__r, __right); - } - __STL_UNWIND(_S_unref(__r); _S_unref(__right)) - __stl_assert(1 == __result->_M_refcount); - return __result; -} -#endif /* !__GC */ - -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeRep* -rope<_CharT,_Alloc>::_S_concat(_RopeRep* __left, _RopeRep* __right) -{ - if (0 == __left) { - _S_ref(__right); - return __right; - } - if (0 == __right) { - __left->_M_ref_nonnil(); - return __left; - } - if (_RopeRep::_S_leaf == __right->_M_tag) { - if (_RopeRep::_S_leaf == __left->_M_tag) { - if (__right->_M_size + __left->_M_size <= _S_copy_max) { - return _S_leaf_concat_char_iter((_RopeLeaf*)__left, - ((_RopeLeaf*)__right)->_M_data, - __right->_M_size); - } - } else if (_RopeRep::_S_concat == __left->_M_tag - && _RopeRep::_S_leaf == - ((_RopeConcatenation*)__left)->_M_right->_M_tag) { - _RopeLeaf* __leftright = - (_RopeLeaf*)(((_RopeConcatenation*)__left)->_M_right); - if (__leftright->_M_size + __right->_M_size <= _S_copy_max) { - _RopeRep* __leftleft = ((_RopeConcatenation*)__left)->_M_left; - _RopeRep* __rest = _S_leaf_concat_char_iter(__leftright, - ((_RopeLeaf*)__right)->_M_data, - __right->_M_size); - __leftleft->_M_ref_nonnil(); - __STL_TRY { - return(_S_tree_concat(__leftleft, __rest)); - } - __STL_UNWIND(_S_unref(__leftleft); _S_unref(__rest)) - } - } - } - __left->_M_ref_nonnil(); - __right->_M_ref_nonnil(); - __STL_TRY { - return(_S_tree_concat(__left, __right)); - } - __STL_UNWIND(_S_unref(__left); _S_unref(__right)); -} - -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeRep* -rope<_CharT,_Alloc>::_S_substring(_RopeRep* __base, - size_t __start, size_t __endp1) -{ - if (0 == __base) return 0; - size_t __len = __base->_M_size; - size_t __adj_endp1; - const size_t __lazy_threshold = 128; - - if (__endp1 >= __len) { - if (0 == __start) { - __base->_M_ref_nonnil(); - return __base; - } else { - __adj_endp1 = __len; - } - } else { - __adj_endp1 = __endp1; - } - switch(__base->_M_tag) { - case _RopeRep::_S_concat: - { - _RopeConcatenation* __c = (_RopeConcatenation*)__base; - _RopeRep* __left = __c->_M_left; - _RopeRep* __right = __c->_M_right; - size_t __left_len = __left->_M_size; - _RopeRep* __result; - - if (__adj_endp1 <= __left_len) { - return _S_substring(__left, __start, __endp1); - } else if (__start >= __left_len) { - return _S_substring(__right, __start - __left_len, - __adj_endp1 - __left_len); - } - _Self_destruct_ptr __left_result( - _S_substring(__left, __start, __left_len)); - _Self_destruct_ptr __right_result( - _S_substring(__right, 0, __endp1 - __left_len)); - __result = _S_concat(__left_result, __right_result); -# ifndef __GC - __stl_assert(1 == __result->_M_refcount); -# endif - return __result; - } - case _RopeRep::_S_leaf: - { - _RopeLeaf* __l = (_RopeLeaf*)__base; - _RopeLeaf* __result; - size_t __result_len; - if (__start >= __adj_endp1) return 0; - __result_len = __adj_endp1 - __start; - if (__result_len > __lazy_threshold) goto lazy; -# ifdef __GC - const _CharT* __section = __l->_M_data + __start; - __result = _S_new_RopeLeaf(__section, __result_len, - __base->get_allocator()); - __result->_M_c_string = 0; // Not eos terminated. -# else - // We should sometimes create substring node instead. - __result = __STL_ROPE_FROM_UNOWNED_CHAR_PTR( - __l->_M_data + __start, __result_len, - __base->get_allocator()); -# endif - return __result; - } - case _RopeRep::_S_substringfn: - // Avoid introducing multiple layers of substring nodes. - { - _RopeSubstring* __old = (_RopeSubstring*)__base; - size_t __result_len; - if (__start >= __adj_endp1) return 0; - __result_len = __adj_endp1 - __start; - if (__result_len > __lazy_threshold) { - _RopeSubstring* __result = - _S_new_RopeSubstring(__old->_M_base, - __start + __old->_M_start, - __adj_endp1 - __start, - __base->get_allocator()); - return __result; - - } // *** else fall through: *** - } - case _RopeRep::_S_function: - { - _RopeFunction* __f = (_RopeFunction*)__base; - _CharT* __section; - size_t __result_len; - if (__start >= __adj_endp1) return 0; - __result_len = __adj_endp1 - __start; - - if (__result_len > __lazy_threshold) goto lazy; - __section = (_CharT*) - _Data_allocate(_S_rounded_up_size(__result_len)); - __STL_TRY { - (*(__f->_M_fn))(__start, __result_len, __section); - } - __STL_UNWIND(_RopeRep::__STL_FREE_STRING( - __section, __result_len, __base->get_allocator())); - _S_cond_store_eos(__section[__result_len]); - return _S_new_RopeLeaf(__section, __result_len, - __base->get_allocator()); - } - } - /*NOTREACHED*/ - __stl_assert(false); - lazy: - { - // Create substring node. - return _S_new_RopeSubstring(__base, __start, __adj_endp1 - __start, - __base->get_allocator()); - } -} - -template<class _CharT> -class _Rope_flatten_char_consumer : public _Rope_char_consumer<_CharT> { - private: - _CharT* _M_buf_ptr; - public: - // _CharT* _M_buffer; // XXX not used - - _Rope_flatten_char_consumer(_CharT* __buffer) { - _M_buf_ptr = __buffer; - }; - ~_Rope_flatten_char_consumer() {} - bool operator() (const _CharT* __leaf, size_t __n) { - uninitialized_copy_n(__leaf, __n, _M_buf_ptr); - _M_buf_ptr += __n; - return true; - } -}; - -template<class _CharT> -class _Rope_find_char_char_consumer : public _Rope_char_consumer<_CharT> { - private: - _CharT _M_pattern; - public: - size_t _M_count; // Number of nonmatching characters - _Rope_find_char_char_consumer(_CharT __p) - : _M_pattern(__p), _M_count(0) {} - ~_Rope_find_char_char_consumer() {} - bool operator() (const _CharT* __leaf, size_t __n) { - size_t __i; - for (__i = 0; __i < __n; __i++) { - if (__leaf[__i] == _M_pattern) { - _M_count += __i; return false; - } - } - _M_count += __n; return true; - } -}; - -template<class _CharT> -class _Rope_insert_char_consumer : public _Rope_char_consumer<_CharT> { - private: - typedef ostream _Insert_ostream; - _Insert_ostream& _M_o; - public: - // _CharT* buffer; // XXX not used - _Rope_insert_char_consumer(_Insert_ostream& __writer) - : _M_o(__writer) {}; - ~_Rope_insert_char_consumer() { }; - // Caller is presumed to own the ostream - bool operator() (const _CharT* __leaf, size_t __n); - // Returns true to continue traversal. -}; - -template<class _CharT> -bool _Rope_insert_char_consumer<_CharT>::operator() - (const _CharT* __leaf, size_t __n) -{ - size_t __i; - // We assume that formatting is set up correctly for each element. - for (__i = 0; __i < __n; __i++) _M_o << __leaf[__i]; - return true; -} - -inline bool _Rope_insert_char_consumer<char>::operator() - (const char* __leaf, size_t __n) -{ - size_t __i; - for (__i = 0; __i < __n; __i++) _M_o.put(__leaf[__i]); - return true; -} - -#if 0 -// I couldn't get this to work work with the VC++ version of basic_ostream. -// It also doesn't really do the right thing unless o is a wide stream. -// Given that wchar_t is often 4 bytes, its not clear to me how useful -// this stuff is anyway. -inline bool _Rope_insert_char_consumer<wchar_t>::operator() - (const wchar_t* __leaf, size_t __n) -{ - size_t __i; - for (__i = 0; __i < __n; __i++) _M_o.put(__leaf[__i]); - return true; -} -#endif /* !_MSC_VER && !BORLAND */ - -template <class _CharT, class _Alloc> -bool rope<_CharT, _Alloc>::_S_apply_to_pieces( - _Rope_char_consumer<_CharT>& __c, - const _RopeRep* __r, - size_t __begin, size_t __end) -{ - if (0 == __r) return true; - switch(__r->_M_tag) { - case _RopeRep::_S_concat: - { - _RopeConcatenation* __conc = (_RopeConcatenation*)__r; - _RopeRep* __left = __conc->_M_left; - size_t __left_len = __left->_M_size; - if (__begin < __left_len) { - size_t __left_end = min(__left_len, __end); - if (!_S_apply_to_pieces(__c, __left, __begin, __left_end)) - return false; - } - if (__end > __left_len) { - _RopeRep* __right = __conc->_M_right; - size_t __right_start = max(__left_len, __begin); - if (!_S_apply_to_pieces(__c, __right, - __right_start - __left_len, - __end - __left_len)) { - return false; - } - } - } - return true; - case _RopeRep::_S_leaf: - { - _RopeLeaf* __l = (_RopeLeaf*)__r; - return __c(__l->_M_data + __begin, __end - __begin); - } - case _RopeRep::_S_function: - case _RopeRep::_S_substringfn: - { - _RopeFunction* __f = (_RopeFunction*)__r; - size_t __len = __end - __begin; - bool __result; - _CharT* __buffer = - (_CharT*)alloc::allocate(__len * sizeof(_CharT)); - __STL_TRY { - (*(__f->_M_fn))(__begin, __end, __buffer); - __result = __c(__buffer, __len); - alloc::deallocate(__buffer, __len * sizeof(_CharT)); - } - __STL_UNWIND((alloc::deallocate(__buffer, - __len * sizeof(_CharT)))) - return __result; - } - default: - __stl_assert(false); - /*NOTREACHED*/ - return false; - } -} - -inline void _Rope_fill(ostream& __o, size_t __n) -{ - char __f = __o.fill(); - size_t __i; - - for (__i = 0; __i < __n; __i++) __o.put(__f); -} - - -template <class _CharT> inline bool _Rope_is_simple(_CharT*) { return false; } -inline bool _Rope_is_simple(char*) { return true; } -inline bool _Rope_is_simple(wchar_t*) { return true; } - - -template<class _CharT, class _Alloc> -ostream& operator<< (ostream& __o, const rope<_CharT, _Alloc>& __r) -{ - size_t __w = __o.width(); - bool __left = bool(__o.flags() & ios::left); - size_t __pad_len; - size_t __rope_len = __r.size(); - _Rope_insert_char_consumer<_CharT> __c(__o); - bool __is_simple = _Rope_is_simple((_CharT*)0); - - if (__rope_len < __w) { - __pad_len = __w - __rope_len; - } else { - __pad_len = 0; - } - if (!__is_simple) __o.width(__w/__rope_len); - __STL_TRY { - if (__is_simple && !__left && __pad_len > 0) { - _Rope_fill(__o, __pad_len); - } - __r.apply_to_pieces(0, __r.size(), __c); - if (__is_simple && __left && __pad_len > 0) { - _Rope_fill(__o, __pad_len); - } - if (!__is_simple) - __o.width(__w); - } - __STL_UNWIND(if (!__is_simple) __o.width(__w)) - return __o; -} - -template <class _CharT, class _Alloc> -_CharT* -rope<_CharT,_Alloc>::_S_flatten(_RopeRep* __r, - size_t __start, size_t __len, - _CharT* __buffer) -{ - _Rope_flatten_char_consumer<_CharT> __c(__buffer); - _S_apply_to_pieces(__c, __r, __start, __start + __len); - return(__buffer + __len); -} - -template <class _CharT, class _Alloc> -size_t -rope<_CharT,_Alloc>::find(_CharT __pattern, size_t __start) const -{ - _Rope_find_char_char_consumer<_CharT> __c(__pattern); - _S_apply_to_pieces(__c, _M_tree_ptr, __start, size()); - size_type __result_pos = __start + __c._M_count; -# ifndef __STL_OLD_ROPE_SEMANTICS - if (__result_pos == size()) __result_pos = npos; -# endif - return __result_pos; -} - -template <class _CharT, class _Alloc> -_CharT* -rope<_CharT,_Alloc>::_S_flatten(_RopeRep* __r, _CharT* __buffer) -{ - if (0 == __r) return __buffer; - switch(__r->_M_tag) { - case _RopeRep::_S_concat: - { - _RopeConcatenation* __c = (_RopeConcatenation*)__r; - _RopeRep* __left = __c->_M_left; - _RopeRep* __right = __c->_M_right; - _CharT* __rest = _S_flatten(__left, __buffer); - return _S_flatten(__right, __rest); - } - case _RopeRep::_S_leaf: - { - _RopeLeaf* __l = (_RopeLeaf*)__r; - return copy_n(__l->_M_data, __l->_M_size, __buffer).second; - } - case _RopeRep::_S_function: - case _RopeRep::_S_substringfn: - // We dont yet do anything with substring nodes. - // This needs to be fixed before ropefiles will work well. - { - _RopeFunction* __f = (_RopeFunction*)__r; - (*(__f->_M_fn))(0, __f->_M_size, __buffer); - return __buffer + __f->_M_size; - } - default: - __stl_assert(false); - /*NOTREACHED*/ - return 0; - } -} - - -// This needs work for _CharT != char -template <class _CharT, class _Alloc> -void -rope<_CharT,_Alloc>::_S_dump(_RopeRep* __r, int __indent) -{ - for (int __i = 0; __i < __indent; __i++) putchar(' '); - if (0 == __r) { - printf("NULL\n"); return; - } - if (_RopeRep::_S_concat == __r->_M_tag) { - _RopeConcatenation* __c = (_RopeConcatenation*)__r; - _RopeRep* __left = __c->_M_left; - _RopeRep* __right = __c->_M_right; - -# ifdef __GC - printf("Concatenation %p (depth = %d, len = %ld, %s balanced)\n", - __r, __r->_M_depth, __r->_M_size, __r->_M_is_balanced? "" : "not"); -# else - printf("Concatenation %p (rc = %ld, depth = %d, " - "len = %ld, %s balanced)\n", - __r, __r->_M_refcount, __r->_M_depth, __r->_M_size, - __r->_M_is_balanced? "" : "not"); -# endif - _S_dump(__left, __indent + 2); - _S_dump(__right, __indent + 2); - return; - } else { - char* __kind; - - switch (__r->_M_tag) { - case _RopeRep::_S_leaf: - __kind = "Leaf"; - break; - case _RopeRep::_S_function: - __kind = "Function"; - break; - case _RopeRep::_S_substringfn: - __kind = "Function representing substring"; - break; - default: - __kind = "(corrupted kind field!)"; - } -# ifdef __GC - printf("%s %p (depth = %d, len = %ld) ", - __kind, __r, __r->_M_depth, __r->_M_size); -# else - printf("%s %p (rc = %ld, depth = %d, len = %ld) ", - __kind, __r, __r->_M_refcount, __r->_M_depth, __r->_M_size); -# endif - if (_S_is_one_byte_char_type((_CharT*)0)) { - const int __max_len = 40; - _Self_destruct_ptr __prefix(_S_substring(__r, 0, __max_len)); - _CharT __buffer[__max_len + 1]; - bool __too_big = __r->_M_size > __prefix->_M_size; - - _S_flatten(__prefix, __buffer); - __buffer[__prefix->_M_size] = _S_eos((_CharT*)0); - printf("%s%s\n", - (char*)__buffer, __too_big? "...\n" : "\n"); - } else { - printf("\n"); - } - } -} - -template <class _CharT, class _Alloc> -const unsigned long -rope<_CharT,_Alloc>::_S_min_len[ - _Rope_RopeRep<_CharT,_Alloc>::_S_max_rope_depth + 1] = { -/* 0 */1, /* 1 */2, /* 2 */3, /* 3 */5, /* 4 */8, /* 5 */13, /* 6 */21, -/* 7 */34, /* 8 */55, /* 9 */89, /* 10 */144, /* 11 */233, /* 12 */377, -/* 13 */610, /* 14 */987, /* 15 */1597, /* 16 */2584, /* 17 */4181, -/* 18 */6765, /* 19 */10946, /* 20 */17711, /* 21 */28657, /* 22 */46368, -/* 23 */75025, /* 24 */121393, /* 25 */196418, /* 26 */317811, -/* 27 */514229, /* 28 */832040, /* 29 */1346269, /* 30 */2178309, -/* 31 */3524578, /* 32 */5702887, /* 33 */9227465, /* 34 */14930352, -/* 35 */24157817, /* 36 */39088169, /* 37 */63245986, /* 38 */102334155, -/* 39 */165580141, /* 40 */267914296, /* 41 */433494437, -/* 42 */701408733, /* 43 */1134903170, /* 44 */1836311903, -/* 45 */2971215073u }; -// These are Fibonacci numbers < 2**32. - -template <class _CharT, class _Alloc> -rope<_CharT,_Alloc>::_RopeRep* -rope<_CharT,_Alloc>::_S_balance(_RopeRep* __r) -{ - _RopeRep* __forest[_RopeRep::_S_max_rope_depth + 1]; - _RopeRep* __result = 0; - int __i; - // Invariant: - // The concatenation of forest in descending order is equal to __r. - // __forest[__i]._M_size >= _S_min_len[__i] - // __forest[__i]._M_depth = __i - // References from forest are included in refcount. - - for (__i = 0; __i <= _RopeRep::_S_max_rope_depth; ++__i) - __forest[__i] = 0; - __STL_TRY { - _S_add_to_forest(__r, __forest); - for (__i = 0; __i <= _RopeRep::_S_max_rope_depth; ++__i) - if (0 != __forest[__i]) { -# ifndef __GC - _Self_destruct_ptr __old(__result); -# endif - __result = _S_concat(__forest[__i], __result); - __forest[__i]->_M_unref_nonnil(); -# if !defined(__GC) && defined(__STL_USE_EXCEPTIONS) - __forest[__i] = 0; -# endif - } - } - __STL_UNWIND(for(__i = 0; __i <= _RopeRep::_S_max_rope_depth; __i++) - _S_unref(__forest[__i])) - if (__result->_M_depth > _RopeRep::_S_max_rope_depth) abort(); - return(__result); -} - - -template <class _CharT, class _Alloc> -void -rope<_CharT,_Alloc>::_S_add_to_forest(_RopeRep* __r, _RopeRep** __forest) -{ - if (__r->_M_is_balanced) { - _S_add_leaf_to_forest(__r, __forest); - return; - } - __stl_assert(__r->_M_tag == _RopeRep::_S_concat); - { - _RopeConcatenation* __c = (_RopeConcatenation*)__r; - - _S_add_to_forest(__c->_M_left, __forest); - _S_add_to_forest(__c->_M_right, __forest); - } -} - - -template <class _CharT, class _Alloc> -void -rope<_CharT,_Alloc>::_S_add_leaf_to_forest(_RopeRep* __r, _RopeRep** __forest) -{ - _RopeRep* __insertee; // included in refcount - _RopeRep* __too_tiny = 0; // included in refcount - int __i; // forest[0..__i-1] is empty - size_t __s = __r->_M_size; - - for (__i = 0; __s >= _S_min_len[__i+1]/* not this bucket */; ++__i) { - if (0 != __forest[__i]) { -# ifndef __GC - _Self_destruct_ptr __old(__too_tiny); -# endif - __too_tiny = _S_concat_and_set_balanced(__forest[__i], __too_tiny); - __forest[__i]->_M_unref_nonnil(); - __forest[__i] = 0; - } - } - { -# ifndef __GC - _Self_destruct_ptr __old(__too_tiny); -# endif - __insertee = _S_concat_and_set_balanced(__too_tiny, __r); - } - // Too_tiny dead, and no longer included in refcount. - // Insertee is live and included. - __stl_assert(_S_is_almost_balanced(__insertee)); - __stl_assert(__insertee->_M_depth <= __r->_M_depth + 1); - for (;; ++__i) { - if (0 != __forest[__i]) { -# ifndef __GC - _Self_destruct_ptr __old(__insertee); -# endif - __insertee = _S_concat_and_set_balanced(__forest[__i], __insertee); - __forest[__i]->_M_unref_nonnil(); - __forest[__i] = 0; - __stl_assert(_S_is_almost_balanced(__insertee)); - } - __stl_assert(_S_min_len[__i] <= __insertee->_M_size); - __stl_assert(__forest[__i] == 0); - if (__i == _RopeRep::_S_max_rope_depth || - __insertee->_M_size < _S_min_len[__i+1]) { - __forest[__i] = __insertee; - // refcount is OK since __insertee is now dead. - return; - } - } -} - -template <class _CharT, class _Alloc> -_CharT -rope<_CharT,_Alloc>::_S_fetch(_RopeRep* __r, size_type __i) -{ - __GC_CONST _CharT* __cstr = __r->_M_c_string; - - __stl_assert(__i < __r->_M_size); - if (0 != __cstr) return __cstr[__i]; - for(;;) { - switch(__r->_M_tag) { - case _RopeRep::_S_concat: - { - _RopeConcatenation* __c = (_RopeConcatenation*)__r; - _RopeRep* __left = __c->_M_left; - size_t __left_len = __left->_M_size; - - if (__i >= __left_len) { - __i -= __left_len; - __r = __c->_M_right; - } else { - __r = __left; - } - } - break; - case _RopeRep::_S_leaf: - { - _RopeLeaf* __l = (_RopeLeaf*)__r; - return __l->_M_data[__i]; - } - case _RopeRep::_S_function: - case _RopeRep::_S_substringfn: - { - _RopeFunction* __f = (_RopeFunction*)__r; - _CharT __result; - - (*(__f->_M_fn))(__i, 1, &__result); - return __result; - } - } - } -} - -# ifndef __GC -// Return a uniquely referenced character slot for the given -// position, or 0 if that's not possible. -template <class _CharT, class _Alloc> -_CharT* -rope<_CharT,_Alloc>::_S_fetch_ptr(_RopeRep* __r, size_type __i) -{ - _RopeRep* __clrstack[_RopeRep::_S_max_rope_depth]; - size_t __csptr = 0; - - for(;;) { - if (__r->_M_refcount > 1) return 0; - switch(__r->_M_tag) { - case _RopeRep::_S_concat: - { - _RopeConcatenation* __c = (_RopeConcatenation*)__r; - _RopeRep* __left = __c->_M_left; - size_t __left_len = __left->_M_size; - - if (__c->_M_c_string != 0) __clrstack[__csptr++] = __c; - if (__i >= __left_len) { - __i -= __left_len; - __r = __c->_M_right; - } else { - __r = __left; - } - } - break; - case _RopeRep::_S_leaf: - { - _RopeLeaf* __l = (_RopeLeaf*)__r; - if (__l->_M_c_string != __l->_M_data && __l->_M_c_string != 0) - __clrstack[__csptr++] = __l; - while (__csptr > 0) { - -- __csptr; - _RopeRep* __d = __clrstack[__csptr]; - __d->_M_free_c_string(); - __d->_M_c_string = 0; - } - return __l->_M_data + __i; - } - case _RopeRep::_S_function: - case _RopeRep::_S_substringfn: - return 0; - } - } -} -# endif /* __GC */ - -// The following could be implemented trivially using -// lexicographical_compare_3way. -// We do a little more work to avoid dealing with rope iterators for -// flat strings. -template <class _CharT, class _Alloc> -int -rope<_CharT,_Alloc>::_S_compare (const _RopeRep* __left, - const _RopeRep* __right) -{ - size_t __left_len; - size_t __right_len; - - if (0 == __right) return 0 != __left; - if (0 == __left) return -1; - __left_len = __left->_M_size; - __right_len = __right->_M_size; - if (_RopeRep::_S_leaf == __left->_M_tag) { - _RopeLeaf* __l = (_RopeLeaf*) __left; - if (_RopeRep::_S_leaf == __right->_M_tag) { - _RopeLeaf* __r = (_RopeLeaf*) __right; - return lexicographical_compare_3way( - __l->_M_data, __l->_M_data + __left_len, - __r->_M_data, __r->_M_data + __right_len); - } else { - const_iterator __rstart(__right, 0); - const_iterator __rend(__right, __right_len); - return lexicographical_compare_3way( - __l->_M_data, __l->_M_data + __left_len, - __rstart, __rend); - } - } else { - const_iterator __lstart(__left, 0); - const_iterator __lend(__left, __left_len); - if (_RopeRep::_S_leaf == __right->_M_tag) { - _RopeLeaf* __r = (_RopeLeaf*) __right; - return lexicographical_compare_3way( - __lstart, __lend, - __r->_M_data, __r->_M_data + __right_len); - } else { - const_iterator __rstart(__right, 0); - const_iterator __rend(__right, __right_len); - return lexicographical_compare_3way( - __lstart, __lend, - __rstart, __rend); - } - } -} - -// Assignment to reference proxies. -template <class _CharT, class _Alloc> -_Rope_char_ref_proxy<_CharT, _Alloc>& -_Rope_char_ref_proxy<_CharT, _Alloc>::operator= (_CharT __c) { - _RopeRep* __old = _M_root->_M_tree_ptr; -# ifndef __GC - // First check for the case in which everything is uniquely - // referenced. In that case we can do this destructively. - _CharT* __ptr = _My_rope::_S_fetch_ptr(__old, _M_pos); - if (0 != __ptr) { - *__ptr = __c; - return *this; - } -# endif - _Self_destruct_ptr __left( - _My_rope::_S_substring(__old, 0, _M_pos)); - _Self_destruct_ptr __right( - _My_rope::_S_substring(__old, _M_pos+1, __old->_M_size)); - _Self_destruct_ptr __result_left( - _My_rope::_S_destr_concat_char_iter(__left, &__c, 1)); - -# ifndef __GC - __stl_assert(__left == __result_left || 1 == __result_left->_M_refcount); -# endif - _RopeRep* __result = - _My_rope::_S_concat(__result_left, __right); -# ifndef __GC - __stl_assert(1 <= __result->_M_refcount); - _RopeRep::_S_unref(__old); -# endif - _M_root->_M_tree_ptr = __result; - return *this; -} - -template <class _CharT, class _Alloc> -inline _Rope_char_ref_proxy<_CharT, _Alloc>::operator _CharT () const -{ - if (_M_current_valid) { - return _M_current; - } else { - return _My_rope::_S_fetch(_M_root->_M_tree_ptr, _M_pos); - } -} -template <class _CharT, class _Alloc> -_Rope_char_ptr_proxy<_CharT, _Alloc> -_Rope_char_ref_proxy<_CharT, _Alloc>::operator& () const { - return _Rope_char_ptr_proxy<_CharT, _Alloc>(*this); -} - -template <class _CharT, class _Alloc> -rope<_CharT, _Alloc>::rope(size_t __n, _CharT __c, - const allocator_type& __a) -: _Base(__a) -{ - rope<_CharT,_Alloc> __result; - const size_t __exponentiate_threshold = 32; - size_t __exponent; - size_t __rest; - _CharT* __rest_buffer; - _RopeRep* __remainder; - rope<_CharT,_Alloc> __remainder_rope; - - if (0 == __n) - return; - - __exponent = __n / __exponentiate_threshold; - __rest = __n % __exponentiate_threshold; - if (0 == __rest) { - __remainder = 0; - } else { - __rest_buffer = _Data_allocate(_S_rounded_up_size(__rest)); - uninitialized_fill_n(__rest_buffer, __rest, __c); - _S_cond_store_eos(__rest_buffer[__rest]); - __STL_TRY { - __remainder = _S_new_RopeLeaf(__rest_buffer, __rest, __a); - } - __STL_UNWIND(_RopeRep::__STL_FREE_STRING(__rest_buffer, __rest, __a)) - } - __remainder_rope._M_tree_ptr = __remainder; - if (__exponent != 0) { - _CharT* __base_buffer = - _Data_allocate(_S_rounded_up_size(__exponentiate_threshold)); - _RopeLeaf* __base_leaf; - rope __base_rope; - uninitialized_fill_n(__base_buffer, __exponentiate_threshold, __c); - _S_cond_store_eos(__base_buffer[__exponentiate_threshold]); - __STL_TRY { - __base_leaf = _S_new_RopeLeaf(__base_buffer, - __exponentiate_threshold, __a); - } - __STL_UNWIND(_RopeRep::__STL_FREE_STRING(__base_buffer, - __exponentiate_threshold, __a)) - __base_rope._M_tree_ptr = __base_leaf; - if (1 == __exponent) { - __result = __base_rope; -# ifndef __GC - __stl_assert(2 == __result._M_tree_ptr->_M_refcount); - // One each for base_rope and __result -# endif - } else { - // XXX what is power()? - __result = power(__base_rope, __exponent, _Concat_fn()); - } - if (0 != __remainder) { - __result += __remainder_rope; - } - } else { - __result = __remainder_rope; - } - _M_tree_ptr = __result._M_tree_ptr; - _M_tree_ptr->_M_ref_nonnil(); -} - -template<class _CharT, class _Alloc> - _CharT rope<_CharT,_Alloc>::_S_empty_c_str[1]; - -# ifdef __STL_PTHREADS - template<class _CharT, class _Alloc> - pthread_mutex_t - rope<_CharT,_Alloc>::_S_swap_lock = PTHREAD_MUTEX_INITIALIZER; -# endif - -template<class _CharT, class _Alloc> -const _CharT* rope<_CharT,_Alloc>::c_str() const { - if (0 == _M_tree_ptr) { - _S_empty_c_str[0] = _S_eos((_CharT*)0); // Possibly redundant, - // but probably fast. - return _S_empty_c_str; - } - __GC_CONST _CharT* __old_c_string = _M_tree_ptr->_M_c_string; - if (0 != __old_c_string) return(__old_c_string); - size_t __s = size(); - _CharT* __result = _Data_allocate(__s + 1); - _S_flatten(_M_tree_ptr, __result); - __result[__s] = _S_eos((_CharT*)0); -# ifdef __GC - _M_tree_ptr->_M_c_string = __result; -# else - if ((__old_c_string = - _S_atomic_swap(&(_M_tree_ptr->_M_c_string), __result)) != 0) { - // It must have been added in the interim. Hence it had to have been - // separately allocated. Deallocate the old copy, since we just - // replaced it. - destroy(__old_c_string, __old_c_string + __s + 1); - _Data_deallocate(__old_c_string, __s + 1); - } -# endif - return(__result); -} - -template<class _CharT, class _Alloc> -const _CharT* rope<_CharT,_Alloc>::replace_with_c_str() { - if (0 == _M_tree_ptr) { - _S_empty_c_str[0] = _S_eos((_CharT*)0); - return _S_empty_c_str; - } - __GC_CONST _CharT* __old_c_string = _M_tree_ptr->_M_c_string; - if (_RopeRep::_S_leaf == _M_tree_ptr->_M_tag && 0 != __old_c_string) { - return(__old_c_string); - } - size_t __s = size(); - _CharT* __result = _Data_allocate(_S_rounded_up_size(__s)); - _S_flatten(_M_tree_ptr, __result); - __result[__s] = _S_eos((_CharT*)0); - _M_tree_ptr->_M_unref_nonnil(); - _M_tree_ptr = _S_new_RopeLeaf(__result, __s, get_allocator()); - return(__result); -} - -// Algorithm specializations. More should be added. - -#ifndef _MSC_VER -// I couldn't get this to work with VC++ -template<class _CharT,class _Alloc> -void -_Rope_rotate(_Rope_iterator<_CharT,_Alloc> __first, - _Rope_iterator<_CharT,_Alloc> __middle, - _Rope_iterator<_CharT,_Alloc> __last) -{ - __stl_assert(__first.container() == __middle.container() - && __middle.container() == __last.container()); - rope<_CharT,_Alloc>& __r(__first.container()); - rope<_CharT,_Alloc> __prefix = __r.substr(0, __first.index()); - rope<_CharT,_Alloc> __suffix = - __r.substr(__last.index(), __r.size() - __last.index()); - rope<_CharT,_Alloc> __part1 = - __r.substr(__middle.index(), __last.index() - __middle.index()); - rope<_CharT,_Alloc> __part2 = - __r.substr(__first.index(), __middle.index() - __first.index()); - __r = __prefix; - __r += __part1; - __r += __part2; - __r += __suffix; -} - -#if !defined(__GNUC__) -// Appears to confuse g++ -inline void rotate(_Rope_iterator<char,__STL_DEFAULT_ALLOCATOR(char)> __first, - _Rope_iterator<char,__STL_DEFAULT_ALLOCATOR(char)> __middle, - _Rope_iterator<char,__STL_DEFAULT_ALLOCATOR(char)> __last) { - _Rope_rotate(__first, __middle, __last); -} -#endif - -# if 0 -// Probably not useful for several reasons: -// - for SGIs 7.1 compiler and probably some others, -// this forces lots of rope<wchar_t, ...> instantiations, creating a -// code bloat and compile time problem. (Fixed in 7.2.) -// - wchar_t is 4 bytes wide on most UNIX platforms, making it unattractive -// for unicode strings. Unsigned short may be a better character -// type. -inline void rotate( - _Rope_iterator<wchar_t,__STL_DEFAULT_ALLOCATOR(char)> __first, - _Rope_iterator<wchar_t,__STL_DEFAULT_ALLOCATOR(char)> __middle, - _Rope_iterator<wchar_t,__STL_DEFAULT_ALLOCATOR(char)> __last) { - _Rope_rotate(__first, __middle, __last); -} -# endif -#endif /* _MSC_VER */ - -#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32) -#pragma reset woff 1174 -#endif - -__STL_END_NAMESPACE - -// Local Variables: -// mode:C++ -// End: |
