Category : C++ Source Code
Archive   : BLFMATH.ZIP
Filename : VECPTR.H

 
Output of file : VECPTR.H contained in archive : BLFMATH.ZIP
/////////////////////////////////////////////////////////////
// vecptr.h: Vector pointer class.
// Copyright(c) 1993 Azarona Software. All rights reserved.
/////////////////////////////////////////////////////////////
#ifndef H_VECPTR
#define H_VECPTR

// NOTE: You can define ELEMENT_STRIDE to get the non-optimized
// version of the vector pointers, which don't use byte strides.

#ifndef ELEMENT_STRIDE

// This is the optimized version

template
class VecPtr {
private:
TYPE *p;
const unsigned stride;
public:
VecPtr(TYPE *t, unsigned s=1) : p(t), stride(s*sizeof(TYPE)) { }
VecPtr(const VecPtr &s) : p(s.p), stride(s.stride) { }
void operator=(const VecPtr &s) { p = s.p; }
void operator=(TYPE *t) { p = t; }
void operator++() { (char *)p += stride; }
void operator++(int) { (char *)p += stride; }
void operator+=(unsigned n) { (char *)p += stride * n; }
TYPE &operator[](unsigned i) const { return *(TYPE *)((char *)p + stride*i); }
operator TYPE *() const { return p; }
TYPE &operator *() const { return *p; }
#ifdef TYPE_IS_STRUCTURE
TYPE *operator->() const { return p; }
#endif
};

#else

// This is the unoptimized version

template
class VecPtr {
private:
TYPE *p;
const unsigned stride;
public:
VecPtr(TYPE *t, unsigned s=1) : p(t), stride(s) { }
VecPtr(const VecPtr &s) : p(s.p), stride(s.stride) { }
void operator=(const VecPtr &s) { p = s.p; }
void operator=(TYPE *t) { p = t; }
void operator++() { p += stride; }
void operator++(int) { p += stride; }
void operator+=(unsigned n) { p += stride * n; }
TYPE &operator[](unsigned i) const { return p[stride*i]; }
operator TYPE *() const { return p; }
TYPE &operator *() const { return *p; }
#ifdef TYPE_IS_STRUCTURE
TYPE *operator->() const { return p; }
#endif
};

#endif

#endif


  3 Responses to “Category : C++ Source Code
Archive   : BLFMATH.ZIP
Filename : VECPTR.H
”

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    January 27, 2013 at 3:59 pm

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