mirror of
https://github.com/upx/upx
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116 lines
3.3 KiB
C++
116 lines
3.3 KiB
C++
/* bptr.h --
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2012 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2012 Laszlo Molnar
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All Rights Reserved.
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UPX and the UCL library are free software; you can redistribute them
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and/or modify them under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Markus F.X.J. Oberhumer Laszlo Molnar
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<markus@oberhumer.com> <ml1050@users.sourceforge.net>
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*/
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#ifndef __UPX_BPTR_H
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#define __UPX_BPTR_H 1
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/*************************************************************************
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// BoundedPtr
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**************************************************************************/
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template <class T>
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class BoundedPtr
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{
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// typedef BoundedPtr<T> Self;
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public:
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typedef T* StoredType;
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typedef T* PointerType;
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typedef T& ReferenceType;
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~BoundedPtr() { }
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explicit BoundedPtr(void* base, unsigned size, T* ptr=0)
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: ptr_(ptr), base_(base), size_(size) { check(); }
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BoundedPtr& operator= (const BoundedPtr& other) {
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assert(base_ == other.base_); assert(size_ == other.size_);
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ptr_ = other.ptr_; check(); return *this;
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}
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BoundedPtr& operator= (T* other) {
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ptr_ = other; check(); return *this;
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}
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operator T* () { check(); return ptr_; }
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operator const T* () const { check(); return ptr_; }
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BoundedPtr& operator += (size_t n) {
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checkStrict(); ptr_ += n; checkStrict(); return *this;
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}
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BoundedPtr& operator -= (size_t n) {
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checkStrict(); ptr_ -= n; checkStrict(); return *this;
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}
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BoundedPtr& operator ++ (void) {
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checkStrict(); ptr_ += 1; checkStrict(); return *this;
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}
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// T* operator ++ (int) {
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// T* p = ptr_; checkStrict(); ptr_ += 1; checkStrict(); return p;
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// }
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// BoundedPtr& operator -- (void) {
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// checkStrict(); ptr_ -= 1; checkStrict(); return *this;
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// }
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private:
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void checkNULL() const {
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if (!ptr_)
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throwCantUnpack("unexpected NULL pointer; take care!");
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}
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void checkRange(size_t extra=0) const {
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size_t off = (const char *) ptr_ - (const char *) base_;
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if (off > size_ || off + extra > size_)
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throwCantUnpack("pointer out of range; take care!");
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}
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void checkStrict(size_t extra=0) const {
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checkNULL();
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checkRange(extra);
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}
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void check(size_t extra=0) const {
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if (ptr_) checkRange(extra);
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}
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T* ptr_;
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void* base_;
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size_t size_;
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// disable copy
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BoundedPtr(const BoundedPtr&); // {}
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// BoundedPtr& operator= (const BoundedPtr&); // { return *this; }
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// disable dynamic allocation
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DISABLE_NEW_DELETE
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};
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#endif /* already included */
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/*
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vi:ts=4:et
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*/
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