585 lines
17 KiB
C
585 lines
17 KiB
C
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
// Name: wx/vector.h
|
||
|
// Purpose: STL vector clone
|
||
|
// Author: Lindsay Mathieson
|
||
|
// Modified by: Vaclav Slavik - make it a template
|
||
|
// Created: 30.07.2001
|
||
|
// Copyright: (c) 2001 Lindsay Mathieson <lindsay@mathieson.org>,
|
||
|
// 2007 Vaclav Slavik <vslavik@fastmail.fm>
|
||
|
// Licence: wxWindows licence
|
||
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
||
|
#ifndef _WX_VECTOR_H_
|
||
|
#define _WX_VECTOR_H_
|
||
|
|
||
|
#include "wx/defs.h"
|
||
|
|
||
|
#if wxUSE_STD_CONTAINERS
|
||
|
|
||
|
#include <vector>
|
||
|
#include <algorithm>
|
||
|
|
||
|
#define wxVector std::vector
|
||
|
template<typename T>
|
||
|
inline void wxVectorSort(wxVector<T>& v)
|
||
|
{
|
||
|
std::sort(v.begin(), v.end());
|
||
|
}
|
||
|
|
||
|
#else // !wxUSE_STD_CONTAINERS
|
||
|
|
||
|
#include "wx/scopeguard.h"
|
||
|
#include "wx/meta/movable.h"
|
||
|
#include "wx/meta/if.h"
|
||
|
|
||
|
#include "wx/beforestd.h"
|
||
|
#include <new> // for placement new
|
||
|
#include "wx/afterstd.h"
|
||
|
|
||
|
// wxQsort is declared in wx/utils.h, but can't include that file here,
|
||
|
// it indirectly includes this file. Just lovely...
|
||
|
typedef int (*wxSortCallback)(const void* pItem1,
|
||
|
const void* pItem2,
|
||
|
const void* user_data);
|
||
|
WXDLLIMPEXP_BASE void wxQsort(void* pbase, size_t total_elems,
|
||
|
size_t size, wxSortCallback cmp,
|
||
|
const void* user_data);
|
||
|
|
||
|
namespace wxPrivate
|
||
|
{
|
||
|
|
||
|
// These templates encapsulate memory operations for use by wxVector; there are
|
||
|
// two implementations, both in generic way for any C++ types and as an
|
||
|
// optimized version for "movable" types that uses realloc() and memmove().
|
||
|
|
||
|
// version for movable types:
|
||
|
template<typename T>
|
||
|
struct wxVectorMemOpsMovable
|
||
|
{
|
||
|
static void Free(T* array)
|
||
|
{ free(array); }
|
||
|
|
||
|
static T* Realloc(T* old, size_t newCapacity, size_t WXUNUSED(occupiedSize))
|
||
|
{ return (T*)realloc(old, newCapacity * sizeof(T)); }
|
||
|
|
||
|
static void MemmoveBackward(T* dest, T* source, size_t count)
|
||
|
{ memmove(dest, source, count * sizeof(T)); }
|
||
|
|
||
|
static void MemmoveForward(T* dest, T* source, size_t count)
|
||
|
{ memmove(dest, source, count * sizeof(T)); }
|
||
|
};
|
||
|
|
||
|
// generic version for non-movable types:
|
||
|
template<typename T>
|
||
|
struct wxVectorMemOpsGeneric
|
||
|
{
|
||
|
static void Free(T* array)
|
||
|
{ ::operator delete(array); }
|
||
|
|
||
|
static T* Realloc(T* old, size_t newCapacity, size_t occupiedSize)
|
||
|
{
|
||
|
T *mem = (T*)::operator new(newCapacity * sizeof(T));
|
||
|
for ( size_t i = 0; i < occupiedSize; i++ )
|
||
|
{
|
||
|
::new(mem + i) T(old[i]);
|
||
|
old[i].~T();
|
||
|
}
|
||
|
::operator delete(old);
|
||
|
return mem;
|
||
|
}
|
||
|
|
||
|
static void MemmoveBackward(T* dest, T* source, size_t count)
|
||
|
{
|
||
|
wxASSERT( dest < source );
|
||
|
T* destptr = dest;
|
||
|
T* sourceptr = source;
|
||
|
for ( size_t i = count; i > 0; --i, ++destptr, ++sourceptr )
|
||
|
{
|
||
|
::new(destptr) T(*sourceptr);
|
||
|
sourceptr->~T();
|
||
|
}
|
||
|
}
|
||
|
|
||
|
static void MemmoveForward(T* dest, T* source, size_t count)
|
||
|
{
|
||
|
wxASSERT( dest > source );
|
||
|
T* destptr = dest + count - 1;
|
||
|
T* sourceptr = source + count - 1;
|
||
|
for ( size_t i = count; i > 0; --i, --destptr, --sourceptr )
|
||
|
{
|
||
|
::new(destptr) T(*sourceptr);
|
||
|
sourceptr->~T();
|
||
|
}
|
||
|
}
|
||
|
};
|
||
|
|
||
|
|
||
|
} // namespace wxPrivate
|
||
|
|
||
|
template<typename T>
|
||
|
class wxVector
|
||
|
{
|
||
|
private:
|
||
|
// This cryptic expression means "typedef Ops to wxVectorMemOpsMovable if
|
||
|
// type T is movable type, otherwise to wxVectorMemOpsGeneric".
|
||
|
//
|
||
|
// Note that we use typedef instead of privately deriving from this (which
|
||
|
// would allowed us to omit "Ops::" prefixes below) to keep VC6 happy,
|
||
|
// it can't compile code that derives from wxIf<...>::value.
|
||
|
//
|
||
|
// Note that bcc needs the extra parentheses for non-type template
|
||
|
// arguments to compile this expression.
|
||
|
typedef typename wxIf< (wxIsMovable<T>::value),
|
||
|
wxPrivate::wxVectorMemOpsMovable<T>,
|
||
|
wxPrivate::wxVectorMemOpsGeneric<T> >::value
|
||
|
Ops;
|
||
|
|
||
|
public:
|
||
|
typedef size_t size_type;
|
||
|
typedef size_t difference_type;
|
||
|
typedef T value_type;
|
||
|
typedef value_type* pointer;
|
||
|
typedef const value_type* const_pointer;
|
||
|
typedef value_type* iterator;
|
||
|
typedef const value_type* const_iterator;
|
||
|
typedef value_type& reference;
|
||
|
typedef const value_type& const_reference;
|
||
|
|
||
|
class reverse_iterator
|
||
|
{
|
||
|
public:
|
||
|
reverse_iterator() : m_ptr(NULL) { }
|
||
|
wxEXPLICIT reverse_iterator(iterator it) : m_ptr(it) { }
|
||
|
reverse_iterator(const reverse_iterator& it) : m_ptr(it.m_ptr) { }
|
||
|
|
||
|
reference operator*() const { return *m_ptr; }
|
||
|
pointer operator->() const { return m_ptr; }
|
||
|
|
||
|
iterator base() const { return m_ptr; }
|
||
|
|
||
|
reverse_iterator& operator++()
|
||
|
{ --m_ptr; return *this; }
|
||
|
reverse_iterator operator++(int)
|
||
|
{ reverse_iterator tmp = *this; --m_ptr; return tmp; }
|
||
|
reverse_iterator& operator--()
|
||
|
{ ++m_ptr; return *this; }
|
||
|
reverse_iterator operator--(int)
|
||
|
{ reverse_iterator tmp = *this; ++m_ptr; return tmp; }
|
||
|
|
||
|
reverse_iterator operator+(difference_type n) const
|
||
|
{ return reverse_iterator(m_ptr - n); }
|
||
|
reverse_iterator& operator+=(difference_type n)
|
||
|
{ m_ptr -= n; return *this; }
|
||
|
reverse_iterator operator-(difference_type n) const
|
||
|
{ return reverse_iterator(m_ptr + n); }
|
||
|
reverse_iterator& operator-=(difference_type n)
|
||
|
{ m_ptr += n; return *this; }
|
||
|
|
||
|
reference operator[](difference_type n) const
|
||
|
{ return *(*this + n); }
|
||
|
|
||
|
bool operator ==(const reverse_iterator& it) const
|
||
|
{ return m_ptr == it.m_ptr; }
|
||
|
bool operator !=(const reverse_iterator& it) const
|
||
|
{ return m_ptr != it.m_ptr; }
|
||
|
|
||
|
private:
|
||
|
value_type *m_ptr;
|
||
|
|
||
|
friend class const_reverse_iterator;
|
||
|
};
|
||
|
|
||
|
class const_reverse_iterator
|
||
|
{
|
||
|
public:
|
||
|
const_reverse_iterator() : m_ptr(NULL) { }
|
||
|
wxEXPLICIT const_reverse_iterator(const_iterator it) : m_ptr(it) { }
|
||
|
const_reverse_iterator(const reverse_iterator& it) : m_ptr(it.m_ptr) { }
|
||
|
const_reverse_iterator(const const_reverse_iterator& it) : m_ptr(it.m_ptr) { }
|
||
|
|
||
|
const_reference operator*() const { return *m_ptr; }
|
||
|
const_pointer operator->() const { return m_ptr; }
|
||
|
|
||
|
const_iterator base() const { return m_ptr; }
|
||
|
|
||
|
const_reverse_iterator& operator++()
|
||
|
{ --m_ptr; return *this; }
|
||
|
const_reverse_iterator operator++(int)
|
||
|
{ const_reverse_iterator tmp = *this; --m_ptr; return tmp; }
|
||
|
const_reverse_iterator& operator--()
|
||
|
{ ++m_ptr; return *this; }
|
||
|
const_reverse_iterator operator--(int)
|
||
|
{ const_reverse_iterator tmp = *this; ++m_ptr; return tmp; }
|
||
|
|
||
|
const_reverse_iterator operator+(difference_type n) const
|
||
|
{ return const_reverse_iterator(m_ptr - n); }
|
||
|
const_reverse_iterator& operator+=(difference_type n)
|
||
|
{ m_ptr -= n; return *this; }
|
||
|
const_reverse_iterator operator-(difference_type n) const
|
||
|
{ return const_reverse_iterator(m_ptr + n); }
|
||
|
const_reverse_iterator& operator-=(difference_type n)
|
||
|
{ m_ptr += n; return *this; }
|
||
|
|
||
|
const_reference operator[](difference_type n) const
|
||
|
{ return *(*this + n); }
|
||
|
|
||
|
bool operator ==(const const_reverse_iterator& it) const
|
||
|
{ return m_ptr == it.m_ptr; }
|
||
|
bool operator !=(const const_reverse_iterator& it) const
|
||
|
{ return m_ptr != it.m_ptr; }
|
||
|
|
||
|
protected:
|
||
|
const value_type *m_ptr;
|
||
|
};
|
||
|
|
||
|
wxVector() : m_size(0), m_capacity(0), m_values(NULL) {}
|
||
|
|
||
|
wxVector(size_type p_size)
|
||
|
: m_size(0), m_capacity(0), m_values(NULL)
|
||
|
{
|
||
|
reserve(p_size);
|
||
|
for ( size_t n = 0; n < p_size; n++ )
|
||
|
push_back(value_type());
|
||
|
}
|
||
|
|
||
|
wxVector(size_type p_size, const value_type& v)
|
||
|
: m_size(0), m_capacity(0), m_values(NULL)
|
||
|
{
|
||
|
reserve(p_size);
|
||
|
for ( size_t n = 0; n < p_size; n++ )
|
||
|
push_back(v);
|
||
|
}
|
||
|
|
||
|
wxVector(const wxVector& c) : m_size(0), m_capacity(0), m_values(NULL)
|
||
|
{
|
||
|
Copy(c);
|
||
|
}
|
||
|
|
||
|
template <class InputIterator>
|
||
|
wxVector(InputIterator first, InputIterator last)
|
||
|
: m_size(0), m_capacity(0), m_values(NULL)
|
||
|
{
|
||
|
assign(first, last);
|
||
|
}
|
||
|
|
||
|
~wxVector()
|
||
|
{
|
||
|
clear();
|
||
|
}
|
||
|
|
||
|
void assign(size_type p_size, const value_type& v)
|
||
|
{
|
||
|
clear();
|
||
|
reserve(p_size);
|
||
|
for ( size_t n = 0; n < p_size; n++ )
|
||
|
push_back(v);
|
||
|
}
|
||
|
|
||
|
template <class InputIterator>
|
||
|
void assign(InputIterator first, InputIterator last)
|
||
|
{
|
||
|
clear();
|
||
|
|
||
|
// Notice that it would be nice to call reserve() here but we can't do
|
||
|
// it for arbitrary input iterators, we should have a dispatch on
|
||
|
// iterator type and call it if possible.
|
||
|
|
||
|
for ( InputIterator it = first; it != last; ++it )
|
||
|
push_back(*it);
|
||
|
}
|
||
|
|
||
|
void swap(wxVector& v)
|
||
|
{
|
||
|
wxSwap(m_size, v.m_size);
|
||
|
wxSwap(m_capacity, v.m_capacity);
|
||
|
wxSwap(m_values, v.m_values);
|
||
|
}
|
||
|
|
||
|
void clear()
|
||
|
{
|
||
|
// call destructors of stored objects:
|
||
|
for ( size_type i = 0; i < m_size; i++ )
|
||
|
{
|
||
|
m_values[i].~T();
|
||
|
}
|
||
|
|
||
|
Ops::Free(m_values);
|
||
|
m_values = NULL;
|
||
|
m_size =
|
||
|
m_capacity = 0;
|
||
|
}
|
||
|
|
||
|
void reserve(size_type n)
|
||
|
{
|
||
|
if ( n <= m_capacity )
|
||
|
return;
|
||
|
|
||
|
// increase the size twice, unless we're already too big or unless
|
||
|
// more is requested
|
||
|
//
|
||
|
// NB: casts to size_type are needed to suppress warnings about
|
||
|
// mixing enumeral and non-enumeral type in conditional expression
|
||
|
const size_type increment = m_size > 0
|
||
|
? m_size < ALLOC_MAX_SIZE
|
||
|
? m_size
|
||
|
: (size_type)ALLOC_MAX_SIZE
|
||
|
: (size_type)ALLOC_INITIAL_SIZE;
|
||
|
if ( m_capacity + increment > n )
|
||
|
n = m_capacity + increment;
|
||
|
|
||
|
m_values = Ops::Realloc(m_values, n, m_size);
|
||
|
m_capacity = n;
|
||
|
}
|
||
|
|
||
|
void resize(size_type n)
|
||
|
{
|
||
|
if ( n < m_size )
|
||
|
Shrink(n);
|
||
|
else if ( n > m_size )
|
||
|
Extend(n, value_type());
|
||
|
}
|
||
|
|
||
|
void resize(size_type n, const value_type& v)
|
||
|
{
|
||
|
if ( n < m_size )
|
||
|
Shrink(n);
|
||
|
else if ( n > m_size )
|
||
|
Extend(n, v);
|
||
|
}
|
||
|
|
||
|
size_type size() const
|
||
|
{
|
||
|
return m_size;
|
||
|
}
|
||
|
|
||
|
size_type capacity() const
|
||
|
{
|
||
|
return m_capacity;
|
||
|
}
|
||
|
|
||
|
bool empty() const
|
||
|
{
|
||
|
return size() == 0;
|
||
|
}
|
||
|
|
||
|
wxVector& operator=(const wxVector& vb)
|
||
|
{
|
||
|
if (this != &vb)
|
||
|
{
|
||
|
clear();
|
||
|
Copy(vb);
|
||
|
}
|
||
|
return *this;
|
||
|
}
|
||
|
|
||
|
void push_back(const value_type& v)
|
||
|
{
|
||
|
reserve(size() + 1);
|
||
|
|
||
|
// use placement new to initialize new object in preallocated place in
|
||
|
// m_values and store 'v' in it:
|
||
|
void* const place = m_values + m_size;
|
||
|
::new(place) value_type(v);
|
||
|
|
||
|
// only increase m_size if the ctor didn't throw an exception; notice
|
||
|
// that if it _did_ throw, everything is OK, because we only increased
|
||
|
// vector's capacity so far and possibly written some data to
|
||
|
// uninitialized memory at the end of m_values
|
||
|
m_size++;
|
||
|
}
|
||
|
|
||
|
void pop_back()
|
||
|
{
|
||
|
erase(end() - 1);
|
||
|
}
|
||
|
|
||
|
const value_type& at(size_type idx) const
|
||
|
{
|
||
|
wxASSERT(idx < m_size);
|
||
|
return m_values[idx];
|
||
|
}
|
||
|
|
||
|
value_type& at(size_type idx)
|
||
|
{
|
||
|
wxASSERT(idx < m_size);
|
||
|
return m_values[idx];
|
||
|
}
|
||
|
|
||
|
const value_type& operator[](size_type idx) const { return at(idx); }
|
||
|
value_type& operator[](size_type idx) { return at(idx); }
|
||
|
const value_type& front() const { return at(0); }
|
||
|
value_type& front() { return at(0); }
|
||
|
const value_type& back() const { return at(size() - 1); }
|
||
|
value_type& back() { return at(size() - 1); }
|
||
|
|
||
|
const_iterator begin() const { return m_values; }
|
||
|
iterator begin() { return m_values; }
|
||
|
const_iterator end() const { return m_values + size(); }
|
||
|
iterator end() { return m_values + size(); }
|
||
|
|
||
|
reverse_iterator rbegin() { return reverse_iterator(end() - 1); }
|
||
|
reverse_iterator rend() { return reverse_iterator(begin() - 1); }
|
||
|
|
||
|
const_reverse_iterator rbegin() const { return const_reverse_iterator(end() - 1); }
|
||
|
const_reverse_iterator rend() const { return const_reverse_iterator(begin() - 1); }
|
||
|
|
||
|
iterator insert(iterator it, const value_type& v = value_type())
|
||
|
{
|
||
|
// NB: this must be done before reserve(), because reserve()
|
||
|
// invalidates iterators!
|
||
|
const size_t idx = it - begin();
|
||
|
const size_t after = end() - it;
|
||
|
|
||
|
reserve(size() + 1);
|
||
|
|
||
|
// the place where the new element is going to be inserted
|
||
|
value_type * const place = m_values + idx;
|
||
|
|
||
|
// unless we're inserting at the end, move following elements out of
|
||
|
// the way:
|
||
|
if ( after > 0 )
|
||
|
Ops::MemmoveForward(place + 1, place, after);
|
||
|
|
||
|
// if the ctor called below throws an exception, we need to move all
|
||
|
// the elements back to their original positions in m_values
|
||
|
wxScopeGuard moveBack = wxMakeGuard(
|
||
|
Ops::MemmoveBackward, place, place + 1, after);
|
||
|
if ( !after )
|
||
|
moveBack.Dismiss();
|
||
|
|
||
|
// use placement new to initialize new object in preallocated place in
|
||
|
// m_values and store 'v' in it:
|
||
|
::new(place) value_type(v);
|
||
|
|
||
|
// now that we did successfully add the new element, increment the size
|
||
|
// and disable moving the items back
|
||
|
moveBack.Dismiss();
|
||
|
m_size++;
|
||
|
|
||
|
return begin() + idx;
|
||
|
}
|
||
|
|
||
|
iterator erase(iterator it)
|
||
|
{
|
||
|
return erase(it, it + 1);
|
||
|
}
|
||
|
|
||
|
iterator erase(iterator first, iterator last)
|
||
|
{
|
||
|
if ( first == last )
|
||
|
return first;
|
||
|
wxASSERT( first < end() && last <= end() );
|
||
|
|
||
|
const size_type idx = first - begin();
|
||
|
const size_type count = last - first;
|
||
|
const size_type after = end() - last;
|
||
|
|
||
|
// erase elements by calling their destructors:
|
||
|
for ( iterator i = first; i < last; ++i )
|
||
|
i->~T();
|
||
|
|
||
|
// once that's done, move following elements over to the freed space:
|
||
|
if ( after > 0 )
|
||
|
{
|
||
|
Ops::MemmoveBackward(m_values + idx, m_values + idx + count, after);
|
||
|
}
|
||
|
|
||
|
m_size -= count;
|
||
|
|
||
|
return begin() + idx;
|
||
|
}
|
||
|
|
||
|
#if WXWIN_COMPATIBILITY_2_8
|
||
|
wxDEPRECATED( size_type erase(size_type n) );
|
||
|
#endif // WXWIN_COMPATIBILITY_2_8
|
||
|
|
||
|
private:
|
||
|
// VC6 can't compile static const int members
|
||
|
enum { ALLOC_INITIAL_SIZE = 16 };
|
||
|
enum { ALLOC_MAX_SIZE = 4096 };
|
||
|
|
||
|
void Copy(const wxVector& vb)
|
||
|
{
|
||
|
reserve(vb.size());
|
||
|
|
||
|
for ( const_iterator i = vb.begin(); i != vb.end(); ++i )
|
||
|
push_back(*i);
|
||
|
}
|
||
|
|
||
|
private:
|
||
|
void Shrink(size_type n)
|
||
|
{
|
||
|
for ( size_type i = n; i < m_size; i++ )
|
||
|
m_values[i].~T();
|
||
|
m_size = n;
|
||
|
}
|
||
|
|
||
|
void Extend(size_type n, const value_type& v)
|
||
|
{
|
||
|
reserve(n);
|
||
|
for ( size_type i = m_size; i < n; i++ )
|
||
|
push_back(v);
|
||
|
}
|
||
|
|
||
|
size_type m_size,
|
||
|
m_capacity;
|
||
|
value_type *m_values;
|
||
|
};
|
||
|
|
||
|
#if WXWIN_COMPATIBILITY_2_8
|
||
|
template<typename T>
|
||
|
inline typename wxVector<T>::size_type wxVector<T>::erase(size_type n)
|
||
|
{
|
||
|
erase(begin() + n);
|
||
|
return n;
|
||
|
}
|
||
|
#endif // WXWIN_COMPATIBILITY_2_8
|
||
|
|
||
|
|
||
|
|
||
|
namespace wxPrivate
|
||
|
{
|
||
|
|
||
|
// This is a helper for the wxVectorSort function, and should not be used
|
||
|
// directly in user's code.
|
||
|
template<typename T>
|
||
|
struct wxVectorComparator
|
||
|
{
|
||
|
static int
|
||
|
Compare(const void* pitem1, const void* pitem2, const void* )
|
||
|
{
|
||
|
const T& item1 = *reinterpret_cast<const T*>(pitem1);
|
||
|
const T& item2 = *reinterpret_cast<const T*>(pitem2);
|
||
|
|
||
|
if (item1 < item2)
|
||
|
return -1;
|
||
|
else if (item2 < item1)
|
||
|
return 1;
|
||
|
else
|
||
|
return 0;
|
||
|
}
|
||
|
};
|
||
|
|
||
|
} // namespace wxPrivate
|
||
|
|
||
|
|
||
|
|
||
|
template<typename T>
|
||
|
void wxVectorSort(wxVector<T>& v)
|
||
|
{
|
||
|
wxQsort(v.begin(), v.size(), sizeof(T),
|
||
|
wxPrivate::wxVectorComparator<T>::Compare, NULL);
|
||
|
}
|
||
|
|
||
|
|
||
|
|
||
|
#endif // wxUSE_STD_CONTAINERS/!wxUSE_STD_CONTAINERS
|
||
|
|
||
|
#if WXWIN_COMPATIBILITY_2_8
|
||
|
#define WX_DECLARE_VECTORBASE(obj, cls) typedef wxVector<obj> cls
|
||
|
#define _WX_DECLARE_VECTOR(obj, cls, exp) WX_DECLARE_VECTORBASE(obj, cls)
|
||
|
#define WX_DECLARE_VECTOR(obj, cls) WX_DECLARE_VECTORBASE(obj, cls)
|
||
|
#endif // WXWIN_COMPATIBILITY_2_8
|
||
|
|
||
|
#endif // _WX_VECTOR_H_
|