another fix

[wxWidgets.git] / src / common / dynarray.cpp

///////////////////////////////////////////////////////////////////////////////
// Name:        dynarray.cpp
// Purpose:     implementation of wxBaseArray class
// Author:      Vadim Zeitlin
// Modified by:
// Created:     12.09.97
// RCS-ID:      $Id$
// Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence:     wxWindows licence
///////////////////////////////////////////////////////////////////////////////

// ============================================================================
// headers
// ============================================================================

#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "dynarray.h"
#endif

#include  "wx/wxprec.h"

#ifdef __BORLANDC__
  #pragma hdrstop
#endif

#include "wx/dynarray.h"
#include "wx/intl.h"

#include <stdlib.h>
#include <string.h> // for memmove

#ifndef max
  #define max(a, b)   (((a) > (b)) ? (a) : (b))
#endif

// we cast the value to long from which we cast it to void * in IndexForInsert:
// this can't work if the pointers are not big enough
wxCOMPILE_TIME_ASSERT( sizeof(wxUIntPtr) <= sizeof(void *),
                       wxArraySizeOfPtrLessSizeOfLong ); // < 32 symbols

// ============================================================================
// constants
// ============================================================================

// size increment = max(50% of current size, ARRAY_MAXSIZE_INCREMENT)
#define   ARRAY_MAXSIZE_INCREMENT    4096

// ============================================================================
// implementation
// ============================================================================

// ----------------------------------------------------------------------------
// wxBaseArray - dynamic array of 'T's
// ----------------------------------------------------------------------------

#define _WX_DEFINE_BASEARRAY_COMMON(T, name)                                \
/* searches the array for an item (forward or backwards) */                 \
int name::Index(T lItem, bool bFromEnd) const                               \
{                                                                           \
  if ( bFromEnd ) {                                                         \
    if ( size() > 0 ) {                                                     \
      size_t n = size();                                                    \
      do {                                                                  \
        if ( (*this)[--n] == lItem )                                        \
          return n;                                                         \
      }                                                                     \
      while ( n != 0 );                                                     \
    }                                                                       \
  }                                                                         \
  else {                                                                    \
    for( size_t n = 0; n < size(); n++ ) {                                  \
      if( (*this)[n] == lItem )                                             \
        return n;                                                           \
    }                                                                       \
  }                                                                         \
                                                                            \
  return wxNOT_FOUND;                                                       \
}                                                                           \
                                                                            \
/* add item assuming the array is sorted with fnCompare function */         \
size_t name::Add(T lItem, CMPFUNC fnCompare)                                \
{                                                                           \
  size_t idx = IndexForInsert(lItem, fnCompare);                            \
  Insert(lItem, idx);                                                       \
  return idx;                                                               \
}

#if wxUSE_STL

#define _WX_DEFINE_BASEARRAY_NOCOMMON(T, name)                              \
size_t name::IndexForInsert(T lItem, CMPFUNC fnCompare) const               \
{                                                                           \
    Predicate p((SCMPFUNC)fnCompare);                                       \
    const_iterator it = std::lower_bound(begin(), end(), lItem, p);         \
    return it - begin();                                                    \
}                                                                           \
                                                                            \
int name::Index(T lItem, CMPFUNC fnCompare) const                           \
{                                                                           \
    Predicate p((SCMPFUNC)fnCompare);                                       \
    const_iterator it = std::lower_bound(begin(), end(), lItem, p);         \
    return (it != end() &&                                                  \
            p(lItem, *it)) ? (int)(it - begin()) : wxNOT_FOUND;             \
}                                                                           \
                                                                            \
void name::Shrink()                                                         \
{                                                                           \
    name tmp(*this);                                                        \
    swap(tmp);                                                              \
}

#else // if !wxUSE_STL

#define _WX_DEFINE_BASEARRAY_NOCOMMON(T, name)                              \
/* ctor */                                                                  \
name::name()                                                                \
{                                                                           \
  m_nSize  =                                                                \
  m_nCount = 0;                                                             \
  m_pItems = (T *)NULL;                                                     \
}                                                                           \
                                                                            \
/* copy ctor */                                                             \
name::name(const name& src)                                                 \
{                                                                           \
  m_nSize  = /* not src.m_nSize to save memory */                           \
  m_nCount = src.m_nCount;                                                  \
                                                                            \
  if ( m_nSize != 0 ) {                                                     \
      m_pItems = new T[m_nSize];                                            \
      /* only copy if allocation succeeded */                               \
      if ( m_pItems ) {                                                     \
          memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(T));               \
      }                                                                     \
      else {                                                                \
          m_nSize = 0;                                                      \
      }                                                                     \
  }                                                                         \
  else                                                                      \
    m_pItems = (T *) NULL;                                                  \
}                                                                           \
                                                                            \
/* assignment operator */                                                   \
name& name::operator=(const name& src)                                      \
{                                                                           \
  wxDELETEA(m_pItems);                                                      \
                                                                            \
  m_nSize  = /* not src.m_nSize to save memory */                           \
  m_nCount = src.m_nCount;                                                  \
                                                                            \
  if ( m_nSize != 0 ){                                                      \
      m_pItems = new T[m_nSize];                                            \
      /* only copy if allocation succeeded */                               \
      if ( m_pItems ) {                                                     \
          memcpy(m_pItems, src.m_pItems, m_nCount*sizeof(T));               \
      }                                                                     \
      else {                                                                \
          m_nSize = 0;                                                      \
      }                                                                     \
  }                                                                         \
  else                                                                      \
    m_pItems = (T *) NULL;                                                  \
                                                                            \
  return *this;                                                             \
}                                                                           \
                                                                            \
/* allocate new buffer of the given size and move our data to it */         \
bool name::Realloc(size_t nSize)                                            \
{                                                                           \
  T *pNew = new T[nSize];                                                   \
  /* only grow if allocation succeeded */                                   \
  if ( !pNew )                                                              \
      return false;                                                         \
                                                                            \
  m_nSize = nSize;                                                          \
  /* copy data to new location */                                           \
  memcpy(pNew, m_pItems, m_nCount*sizeof(T));                               \
  delete [] m_pItems;                                                       \
  m_pItems = pNew;                                                          \
                                                                            \
  return true;                                                              \
}                                                                           \
                                                                            \
/* grow the array */                                                        \
void name::Grow(size_t nIncrement)                                          \
{                                                                           \
  /* only do it if no more place */                                         \
  if( (m_nCount == m_nSize) || ((m_nSize - m_nCount) < nIncrement) ) {      \
    if( m_nSize == 0 ) {                                                    \
      /* was empty, determine initial size */                               \
      size_t size = WX_ARRAY_DEFAULT_INITIAL_SIZE;                          \
      if (size < nIncrement) size = nIncrement;                             \
      /* allocate some memory */                                            \
      m_pItems = new T[size];                                               \
      /* only grow if allocation succeeded */                               \
      if ( m_pItems ) {                                                     \
          m_nSize = size;                                                   \
      }                                                                     \
    }                                                                       \
    else                                                                    \
    {                                                                       \
      /* add at least 50% but not too much */                               \
      size_t ndefIncrement = m_nSize < WX_ARRAY_DEFAULT_INITIAL_SIZE        \
                            ? WX_ARRAY_DEFAULT_INITIAL_SIZE : m_nSize >> 1; \
      if ( ndefIncrement > ARRAY_MAXSIZE_INCREMENT )                        \
        ndefIncrement = ARRAY_MAXSIZE_INCREMENT;                            \
      if ( nIncrement < ndefIncrement )                                     \
        nIncrement = ndefIncrement;                                         \
      Realloc(m_nSize + nIncrement);                                        \
    }                                                                       \
  }                                                                         \
}                                                                           \
                                                                            \
/* make sure that the array has at least count elements */                  \
void name::SetCount(size_t count, T defval)                                 \
{                                                                           \
    if ( m_nSize < count )                                                  \
    {                                                                       \
        /* need to realloc memory: don't overallocate it here as if */      \
        /* SetCount() is called, it probably means that the caller  */      \
        /* knows in advance how many elements there will be in the  */      \
        /* array and so it won't be necessary to realloc it later   */      \
        if ( !Realloc(count) )                                              \
        {                                                                   \
            /* out of memory -- what can we do? */                          \
            return;                                                         \
        }                                                                   \
    }                                                                       \
                                                                            \
    /* add new elements if we extend the array */                           \
    while ( m_nCount < count )                                              \
    {                                                                       \
        m_pItems[m_nCount++] = defval;                                      \
    }                                                                       \
}                                                                           \
                                                                            \
/* dtor */                                                                  \
name::~name()                                                               \
{                                                                           \
  wxDELETEA(m_pItems);                                                      \
}                                                                           \
                                                                            \
/* clears the list */                                                       \
void name::Clear()                                                          \
{                                                                           \
  m_nSize  =                                                                \
  m_nCount = 0;                                                             \
                                                                            \
  wxDELETEA(m_pItems);                                                      \
}                                                                           \
                                                                            \
/* pre-allocates memory (frees the previous data!) */                       \
void name::Alloc(size_t nSize)                                              \
{                                                                           \
  /* only if old buffer was not big enough */                               \
  if ( nSize > m_nSize ) {                                                  \
    wxDELETEA(m_pItems);                                                    \
    m_nSize  = 0;                                                           \
    m_pItems = new T[nSize];                                                \
    /* only alloc if allocation succeeded */                                \
    if ( m_pItems ) {                                                       \
        m_nSize  = nSize;                                                   \
    }                                                                       \
  }                                                                         \
                                                                            \
  m_nCount = 0;                                                             \
}                                                                           \
                                                                            \
/* minimizes the memory usage by freeing unused memory */                   \
void name::Shrink()                                                         \
{                                                                           \
  /* only do it if we have some memory to free */                           \
  if( m_nCount < m_nSize ) {                                                \
    /* allocates exactly as much memory as we need */                       \
    T *pNew = new T[m_nCount];                                              \
    /* only shrink if allocation succeeded */                               \
    if ( pNew ) {                                                           \
        /* copy data to new location */                                     \
        memcpy(pNew, m_pItems, m_nCount*sizeof(T));                         \
        delete [] m_pItems;                                                 \
        m_pItems = pNew;                                                    \
                                                                            \
        /* update the size of the new block */                              \
        m_nSize = m_nCount;                                                 \
    }                                                                       \
    /* else: don't do anything, better keep old memory block! */            \
  }                                                                         \
}                                                                           \
                                                                            \
/* add item at the end */                                                   \
void name::Add(T lItem, size_t nInsert)                                     \
{                                                                           \
  if (nInsert == 0)                                                         \
      return;                                                               \
  Grow(nInsert);                                                            \
  for (size_t i = 0; i < nInsert; i++)                                      \
      m_pItems[m_nCount++] = lItem;                                         \
}                                                                           \
                                                                            \
/* add item at the given position */                                        \
void name::Insert(T lItem, size_t nIndex, size_t nInsert)                   \
{                                                                           \
  wxCHECK_RET( nIndex <= m_nCount, wxT("bad index in wxArray::Insert") );   \
  wxCHECK_RET( m_nCount <= m_nCount + nInsert,                              \
               wxT("array size overflow in wxArray::Insert") );             \
                                                                            \
  if (nInsert == 0)                                                         \
      return;                                                               \
  Grow(nInsert);                                                            \
                                                                            \
  memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex],                   \
          (m_nCount - nIndex)*sizeof(T));                                   \
  for (size_t i = 0; i < nInsert; i++)                                      \
      m_pItems[nIndex + i] = lItem;                                         \
  m_nCount += nInsert;                                                      \
}                                                                           \
                                                                            \
/* search for a place to insert item into sorted array (binary search) */   \
size_t name::IndexForInsert(T lItem, CMPFUNC fnCompare) const               \
{                                                                           \
  size_t i,                                                                 \
       lo = 0,                                                              \
       hi = m_nCount;                                                       \
  int res;                                                                  \
                                                                            \
  while ( lo < hi ) {                                                       \
    i = (lo + hi)/2;                                                        \
                                                                            \
    res = (*fnCompare)((const void *)(wxUIntPtr)lItem,                      \
                       (const void *)(wxUIntPtr)(m_pItems[i]));             \
    if ( res < 0 )                                                          \
      hi = i;                                                               \
    else if ( res > 0 )                                                     \
      lo = i + 1;                                                           \
    else {                                                                  \
      lo = i;                                                               \
      break;                                                                \
    }                                                                       \
  }                                                                         \
                                                                            \
  return lo;                                                                \
}                                                                           \
                                                                            \
/* search for an item in a sorted array (binary search) */                  \
int name::Index(T lItem, CMPFUNC fnCompare) const                           \
{                                                                           \
    size_t n = IndexForInsert(lItem, fnCompare);                            \
                                                                            \
    return (n >= m_nCount ||                                                \
           (*fnCompare)((const void *)(wxUIntPtr)lItem,                     \
                        ((const void *)(wxUIntPtr)m_pItems[n])))            \
                        ? wxNOT_FOUND                                       \
                        : (int)n;                                           \
}                                                                           \
                                                                            \
/* removes item from array (by index) */                                    \
void name::RemoveAt(size_t nIndex, size_t nRemove)                          \
{                                                                           \
  wxCHECK_RET( nIndex < m_nCount, wxT("bad index in wxArray::RemoveAt") );  \
  wxCHECK_RET( nIndex + nRemove <= m_nCount,                                \
               wxT("removing too many elements in wxArray::RemoveAt") );    \
                                                                            \
  memmove(&m_pItems[nIndex], &m_pItems[nIndex + nRemove],                   \
          (m_nCount - nIndex - nRemove)*sizeof(T));                         \
  m_nCount -= nRemove;                                                      \
}                                                                           \
                                                                            \
/* removes item from array (by value) */                                    \
void name::Remove(T lItem)                                                  \
{                                                                           \
  int iIndex = Index(lItem);                                                \
                                                                            \
  wxCHECK_RET( iIndex != wxNOT_FOUND,                                       \
               wxT("removing inexistent item in wxArray::Remove") );        \
                                                                            \
  RemoveAt((size_t)iIndex);                                                 \
}                                                                           \
                                                                            \
/* sort array elements using passed comparaison function */                 \
void name::Sort(CMPFUNC fCmp)                                               \
{                                                                           \
  qsort(m_pItems, m_nCount, sizeof(T), fCmp);                               \
}                                                                           \
                                                                            \
void name::assign(const_iterator first, const_iterator last)                \
{                                                                           \
  clear();                                                                  \
  reserve(last - first);                                                    \
  for(; first != last; ++first)                                             \
    push_back(*first);                                                      \
}                                                                           \
                                                                            \
void name::assign(size_type n, const_reference v)                           \
{                                                                           \
  clear();                                                                  \
  reserve(n);                                                               \
  for( size_type i = 0; i < n; ++i )                                        \
    push_back(v);                                                           \
}                                                                           \
                                                                            \
void name::insert(iterator it, const_iterator first, const_iterator last)   \
{                                                                           \
  size_t nInsert = last - first, nIndex = it - begin();                     \
  if (nInsert == 0)                                                         \
      return;                                                               \
  Grow(nInsert);                                                            \
                                                                            \
  memmove(&m_pItems[nIndex + nInsert], &m_pItems[nIndex],                   \
          (m_nCount - nIndex)*sizeof(T));                                   \
  for (size_t i = 0; i < nInsert; ++i, ++it, ++first)                       \
      *it = *first;                                                         \
  m_nCount += nInsert;                                                      \
}

#endif

#define _WX_DEFINE_BASEARRAY(T, name)                                       \
        _WX_DEFINE_BASEARRAY_COMMON(T, name)                                \
        _WX_DEFINE_BASEARRAY_NOCOMMON(T, name)

_WX_DEFINE_BASEARRAY(const void *, wxBaseArrayPtrVoid)
_WX_DEFINE_BASEARRAY(short,        wxBaseArrayShort)
_WX_DEFINE_BASEARRAY(int,          wxBaseArrayInt)
_WX_DEFINE_BASEARRAY(long,         wxBaseArrayLong)
_WX_DEFINE_BASEARRAY(size_t,       wxBaseArraySizeT)
_WX_DEFINE_BASEARRAY(double,       wxBaseArrayDouble)

#if wxUSE_STL
#include "wx/arrstr.h"

#include "wx/beforestd.h"
#include <functional>
#include "wx/afterstd.h"

_WX_DEFINE_BASEARRAY(wxString, wxBaseArrayStringBase);

// some compilers (Sun CC being the only known example) distinguish between
// extern "C" functions and the functions with C++ linkage and ptr_fun and
// wxStringCompareLess can't take wxStrcmp/wxStricmp directly as arguments in
// this case, we need the wrappers below to make this work
inline int wxStrcmpCppWrapper(const wxChar *p, const wxChar *q)
{
    return wxStrcmp(p, q);
}

inline int wxStricmpCppWrapper(const wxChar *p, const wxChar *q)
{
    return wxStricmp(p, q);
}

int wxArrayString::Index(const wxChar* sz, bool bCase, bool WXUNUSED(bFromEnd)) const
{
    wxArrayString::const_iterator it;

    if (bCase)
    {
        it = std::find_if(begin(), end(),
                          std::not1(
                              std::bind2nd(
                                  std::ptr_fun(wxStrcmpCppWrapper), sz)));
    }
    else // !bCase
    {
        it = std::find_if(begin(), end(),
                          std::not1(
                              std::bind2nd(
                                  std::ptr_fun(wxStricmpCppWrapper), sz)));
    }

    return it == end() ? wxNOT_FOUND : it - begin();
}

template<class F>
class wxStringCompareLess
{
public:
    wxStringCompareLess(F f) : m_f(f) { }
    bool operator()(const wxChar* s1, const wxChar* s2)
        { return m_f(s1, s2) < 0; }
    bool operator()(const wxString& s1, const wxString& s2)
        { return m_f(s1, s2) < 0; }
private:
    F m_f;
};

template<class F>
wxStringCompareLess<F> wxStringCompare(F f)
{
    return wxStringCompareLess<F>(f);
}

void wxArrayString::Sort(CompareFunction function)
{
    std::sort(begin(), end(), wxStringCompare(function));
}

void wxArrayString::Sort(bool reverseOrder)
{
    if (reverseOrder)
    {
        std::sort(begin(), end(), std::greater<wxString>());
    }
    else
    {
        std::sort(begin(), end());
    }
}

int wxSortedArrayString::Index(const wxChar* sz, bool bCase, bool WXUNUSED(bFromEnd)) const
{
    wxSortedArrayString::const_iterator it;
    wxString s(sz);

    if (bCase)
        it = std::lower_bound(begin(), end(), s,
                              wxStringCompare(wxStrcmpCppWrapper));
    else
        it = std::lower_bound(begin(), end(), s,
                              wxStringCompare(wxStricmpCppWrapper));

    if (it == end())
        return wxNOT_FOUND;

    if (bCase)
    {
        if (wxStrcmp(it->c_str(), sz) != 0)
            return wxNOT_FOUND;
    }
    else
    {
        if (wxStricmp(it->c_str(), sz) != 0)
            return wxNOT_FOUND;
    }

    return it - begin();
}

#endif