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ropeimpl.h
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/*
* 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>
#ifdef __STL_USE_NEW_IOSTREAMS
# include <iostream>
#else /* __STL_USE_NEW_IOSTREAMS */
# include <iostream.h>
#endif /* __STL_USE_NEW_IOSTREAMS */
#ifdef __STL_USE_EXCEPTIONS
# include <stdexcept>
#endif
__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_ref_count >= 1);
if (__r->_M_ref_count > 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_ref_count == 1);
__r->_M_ref_count = 2;
return __r;
} else {
_RopeLeaf* __result = _S_leaf_concat_char_iter(__r, __iter, __len);
__stl_assert(__result->_M_ref_count == 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_ref_count
&& 1 == __balanced->_M_ref_count);
}
# 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_ref_count);
# 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_ref_count);
# 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_ref_count);
# 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_ref_count;
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_ref_count = 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_ref_count == 2);
__new_right->_M_ref_count = 1;
} else {
__stl_assert(__new_right->_M_ref_count >= 1);
__right->_M_unref_nonnil();
}
__stl_assert(__r->_M_ref_count == 1);
__r->_M_ref_count = 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_ref_count);
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_ref_count);
# 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:
_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;
}
};
#ifdef __STL_USE_NEW_IOSTREAMS
template<class _CharT, class _Traits>
// Here _CharT is both the stream and rope character type.
#else
template<class _CharT>
// Here _CharT is the rope character type. Unlike in the
// above case, we somewhat handle the case in which it doesn't
// match the stream character type, i.e. char.
#endif
class _Rope_insert_char_consumer : public _Rope_char_consumer<_CharT> {
private:
# ifdef __STL_USE_NEW_IOSTREAMS
typedef basic_ostream<_CharT,_Traits> _Insert_ostream;
# else
typedef ostream _Insert_ostream;
# endif
_Insert_ostream& _M_o;
public:
_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.
};
#ifdef __STL_USE_NEW_IOSTREAMS
template<class _CharT, class _Traits>
bool _Rope_insert_char_consumer<_CharT, _Traits>::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.put(__leaf[__i]);
return true;
}
#else
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;
}
__STL_TEMPLATE_NULL
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;
}
#endif
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, __len, __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;
}
}
#ifdef __STL_USE_NEW_IOSTREAMS
template<class _CharT, class _Traits>
inline void _Rope_fill(basic_ostream<_CharT, _Traits>& __o, size_t __n)
#else
inline void _Rope_fill(ostream& __o, size_t __n)
#endif
{
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; }
#ifdef __STL_USE_NEW_IOSTREAMS
template<class _CharT, class _Traits, class _Alloc>
basic_ostream<_CharT, _Traits>& operator<<
(basic_ostream<_CharT, _Traits>& __o,
const rope<_CharT, _Alloc>& __r)
#else
template<class _CharT, class _Alloc>
ostream& operator<< (ostream& __o, const rope<_CharT, _Alloc>& __r)
#endif
{
size_t __w = __o.width();
bool __left = bool(__o.flags() & ios::left);
size_t __pad_len;
size_t __rope_len = __r.size();
# ifdef __STL_USE_NEW_IOSTREAMS
_Rope_insert_char_consumer<_CharT, _Traits> __c(__o);
# else
_Rope_insert_char_consumer<_CharT> __c(__o);
# endif
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) {