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upx/src/bele.h
Markus F.X.J. Oberhumer c4da5e81fa Welcome 2017.
2017-01-03 12:02:07 +01:00

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/* bele.h -- access memory in BigEndian and LittleEndian byte order
This file is part of the UPX executable compressor.
Copyright (C) 1996-2017 Markus Franz Xaver Johannes Oberhumer
Copyright (C) 1996-2017 Laszlo Molnar
All Rights Reserved.
UPX and the UCL library are free software; you can redistribute them
and/or modify them under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
Markus F.X.J. Oberhumer Laszlo Molnar
<markus@oberhumer.com> <ezerotven+github@gmail.com>
*/
#ifndef __UPX_BELE_H
#define __UPX_BELE_H 1
/*************************************************************************
// core
**************************************************************************/
inline unsigned get_be16(const void *p)
{
#if defined(ACC_UA_GET_BE16)
return ACC_UA_GET_BE16(p);
#else
return acc_ua_get_be16(p);
#endif
}
inline void set_be16(void *p, unsigned v)
{
#if defined(ACC_UA_SET_BE16)
ACC_UA_SET_BE16(p, v);
#else
acc_ua_set_be16(p, v);
#endif
}
inline unsigned get_be24(const void *p)
{
#if defined(ACC_UA_GET_BE24)
return ACC_UA_GET_BE24(p);
#else
return acc_ua_get_be24(p);
#endif
}
inline void set_be24(void *p, unsigned v)
{
#if defined(ACC_UA_SET_BE24)
ACC_UA_SET_BE24(p, v);
#else
acc_ua_set_be24(p, v);
#endif
}
inline unsigned get_be32(const void *p)
{
#if defined(ACC_UA_GET_BE32)
return ACC_UA_GET_BE32(p);
#else
return acc_ua_get_be32(p);
#endif
}
inline void set_be32(void *p, unsigned v)
{
#if defined(ACC_UA_SET_BE32)
ACC_UA_SET_BE32(p, v);
#else
acc_ua_set_be32(p, v);
#endif
}
inline upx_uint64_t get_be64(const void *p)
{
#if defined(ACC_UA_GET_BE64)
return ACC_UA_GET_BE64(p);
#else
return acc_ua_get_be64(p);
#endif
}
inline void set_be64(void *p, upx_uint64_t v)
{
#if defined(ACC_UA_SET_BE64)
ACC_UA_SET_BE64(p, v);
#else
acc_ua_set_be64(p, v);
#endif
}
inline unsigned get_le16(const void *p)
{
#if defined(ACC_UA_GET_LE16)
return ACC_UA_GET_LE16(p);
#else
return acc_ua_get_le16(p);
#endif
}
inline void set_le16(void *p, unsigned v)
{
#if defined(ACC_UA_SET_LE16)
ACC_UA_SET_LE16(p, v);
#else
acc_ua_set_le16(p, v);
#endif
}
inline unsigned get_le24(const void *p)
{
#if defined(ACC_UA_GET_LE24)
return ACC_UA_GET_LE24(p);
#else
return acc_ua_get_le24(p);
#endif
}
inline void set_le24(void *p, unsigned v)
{
#if defined(ACC_UA_SET_LE24)
ACC_UA_SET_LE24(p, v);
#else
acc_ua_set_le24(p, v);
#endif
}
inline unsigned get_le32(const void *p)
{
#if defined(ACC_UA_GET_LE32)
return ACC_UA_GET_LE32(p);
#else
return acc_ua_get_le32(p);
#endif
}
inline void set_le32(void *p, unsigned v)
{
#if defined(ACC_UA_SET_LE32)
ACC_UA_SET_LE32(p, v);
#else
acc_ua_set_le32(p, v);
#endif
}
inline upx_uint64_t get_le64(const void *p)
{
#if defined(ACC_UA_GET_LE64)
return ACC_UA_GET_LE64(p);
#else
return acc_ua_get_le64(p);
#endif
}
inline void set_le64(void *p, upx_uint64_t v)
{
#if defined(ACC_UA_SET_LE64)
ACC_UA_SET_LE64(p, v);
#else
acc_ua_set_le64(p, v);
#endif
}
/*************************************************************************
// get signed values, i.e. sign-extend
**************************************************************************/
inline int sign_extend(unsigned v, unsigned bits)
{
const unsigned sign_bit = 1u << (bits - 1);
v &= sign_bit | (sign_bit - 1);
v |= 0 - (v & sign_bit);
return ACC_ICAST(int, v);
}
inline upx_int64_t sign_extend(upx_uint64_t v, unsigned bits)
{
const upx_uint64_t sign_bit = UPX_UINT64_C(1) << (bits - 1);
v &= sign_bit | (sign_bit - 1);
v |= 0 - (v & sign_bit);
return ACC_ICAST(upx_int64_t, v);
}
inline int get_be16_signed(const void *p)
{
unsigned v = get_be16(p);
return sign_extend(v, 16);
}
inline int get_be24_signed(const void *p)
{
unsigned v = get_be24(p);
return sign_extend(v, 24);
}
inline int get_be32_signed(const void *p)
{
unsigned v = get_be32(p);
return sign_extend(v, 32);
}
inline upx_int64_t get_be64_signed(const void *p)
{
upx_uint64_t v = get_be64(p);
return sign_extend(v, 64);
}
inline int get_le16_signed(const void *p)
{
unsigned v = get_le16(p);
return sign_extend(v, 16);
}
inline int get_le24_signed(const void *p)
{
unsigned v = get_le24(p);
return sign_extend(v, 24);
}
inline int get_le32_signed(const void *p)
{
unsigned v = get_le32(p);
return sign_extend(v, 32);
}
inline upx_int64_t get_le64_signed(const void *p)
{
upx_uint64_t v = get_le64(p);
return sign_extend(v, 64);
}
/*************************************************************************
// swab (bswap)
**************************************************************************/
inline unsigned acc_swab16(unsigned v)
{
return ((v & 0x00ff) << 8) |
((v & 0xff00) >> 8);
}
inline unsigned acc_swab32(unsigned v)
{
return ((v & 0x000000ff) << 24) |
((v & 0x0000ff00) << 8) |
((v & 0x00ff0000) >> 8) |
((v & 0xff000000) >> 24);
}
inline unsigned acc_swab16p(const upx_uint16_t *p)
{
return acc_swab16(*p);
}
inline unsigned acc_swap32p(const upx_uint32_t *p)
{
return acc_swab32(*p);
}
inline void acc_swab16s(upx_uint16_t *p)
{
*p = ACC_ICONV(upx_uint16_t, acc_swab16(*p));
}
inline void acc_swab32s(upx_uint32_t *p)
{
*p = ACC_ICONV(upx_uint32_t, acc_swab32(*p));
}
inline void acc_ua_swab16s(void *p)
{
set_be16(p, get_le16(p));
}
inline void acc_ua_swab32s(void *p)
{
set_be32(p, get_le32(p));
}
/*************************************************************************
// classes for portable unaligned access
//
// Important: these classes must be PODs (Plain Old Data), i.e. no
// constructor, no destructor, no virtual functions and no default
// assignment operator, and all fields must be public(!).
//
// [Actually we _can_ use a safe non-POD subset, but for this we need
// to have gcc bug 17519 fixed - see http://gcc.gnu.org/PR17519 ]
**************************************************************************/
__packed_struct(BE16)
unsigned char d[2];
BE16& operator = (unsigned v) { set_be16(d, v); return *this; }
BE16& operator += (unsigned v) { set_be16(d, get_be16(d) + v); return *this; }
BE16& operator -= (unsigned v) { set_be16(d, get_be16(d) - v); return *this; }
BE16& operator *= (unsigned v) { set_be16(d, get_be16(d) * v); return *this; }
BE16& operator /= (unsigned v) { set_be16(d, get_be16(d) / v); return *this; }
BE16& operator &= (unsigned v) { set_be16(d, get_be16(d) & v); return *this; }
BE16& operator |= (unsigned v) { set_be16(d, get_be16(d) | v); return *this; }
BE16& operator ^= (unsigned v) { set_be16(d, get_be16(d) ^ v); return *this; }
BE16& operator <<= (unsigned v) { set_be16(d, get_be16(d) << v); return *this; }
BE16& operator >>= (unsigned v) { set_be16(d, get_be16(d) >> v); return *this; }
operator unsigned () const { return get_be16(d); }
__packed_struct_end()
__packed_struct(BE32)
unsigned char d[4];
BE32& operator = (unsigned v) { set_be32(d, v); return *this; }
BE32& operator += (unsigned v) { set_be32(d, get_be32(d) + v); return *this; }
BE32& operator -= (unsigned v) { set_be32(d, get_be32(d) - v); return *this; }
BE32& operator *= (unsigned v) { set_be32(d, get_be32(d) * v); return *this; }
BE32& operator /= (unsigned v) { set_be32(d, get_be32(d) / v); return *this; }
BE32& operator &= (unsigned v) { set_be32(d, get_be32(d) & v); return *this; }
BE32& operator |= (unsigned v) { set_be32(d, get_be32(d) | v); return *this; }
BE32& operator ^= (unsigned v) { set_be32(d, get_be32(d) ^ v); return *this; }
BE32& operator <<= (unsigned v) { set_be32(d, get_be32(d) << v); return *this; }
BE32& operator >>= (unsigned v) { set_be32(d, get_be32(d) >> v); return *this; }
operator unsigned () const { return get_be32(d); }
__packed_struct_end()
__packed_struct(BE64)
unsigned char d[8];
BE64& operator = (upx_uint64_t v) { set_be64(d, v); return *this; }
BE64& operator += (upx_uint64_t v) { set_be64(d, get_be64(d) + v); return *this; }
BE64& operator -= (upx_uint64_t v) { set_be64(d, get_be64(d) - v); return *this; }
BE64& operator *= (upx_uint64_t v) { set_be64(d, get_be64(d) * v); return *this; }
BE64& operator /= (upx_uint64_t v) { set_be64(d, get_be64(d) / v); return *this; }
BE64& operator &= (upx_uint64_t v) { set_be64(d, get_be64(d) & v); return *this; }
BE64& operator |= (upx_uint64_t v) { set_be64(d, get_be64(d) | v); return *this; }
BE64& operator ^= (upx_uint64_t v) { set_be64(d, get_be64(d) ^ v); return *this; }
BE64& operator <<= (unsigned v) { set_be64(d, get_be64(d) << v); return *this; }
BE64& operator >>= (unsigned v) { set_be64(d, get_be64(d) >> v); return *this; }
operator upx_uint64_t () const { return get_be64(d); }
__packed_struct_end()
__packed_struct(LE16)
unsigned char d[2];
LE16& operator = (unsigned v) { set_le16(d, v); return *this; }
LE16& operator += (unsigned v) { set_le16(d, get_le16(d) + v); return *this; }
LE16& operator -= (unsigned v) { set_le16(d, get_le16(d) - v); return *this; }
LE16& operator *= (unsigned v) { set_le16(d, get_le16(d) * v); return *this; }
LE16& operator /= (unsigned v) { set_le16(d, get_le16(d) / v); return *this; }
LE16& operator &= (unsigned v) { set_le16(d, get_le16(d) & v); return *this; }
LE16& operator |= (unsigned v) { set_le16(d, get_le16(d) | v); return *this; }
LE16& operator ^= (unsigned v) { set_le16(d, get_le16(d) ^ v); return *this; }
LE16& operator <<= (unsigned v) { set_le16(d, get_le16(d) << v); return *this; }
LE16& operator >>= (unsigned v) { set_le16(d, get_le16(d) >> v); return *this; }
operator unsigned () const { return get_le16(d); }
__packed_struct_end()
__packed_struct(LE32)
unsigned char d[4];
LE32& operator = (unsigned v) { set_le32(d, v); return *this; }
LE32& operator += (unsigned v) { set_le32(d, get_le32(d) + v); return *this; }
LE32& operator -= (unsigned v) { set_le32(d, get_le32(d) - v); return *this; }
LE32& operator *= (unsigned v) { set_le32(d, get_le32(d) * v); return *this; }
LE32& operator /= (unsigned v) { set_le32(d, get_le32(d) / v); return *this; }
LE32& operator &= (unsigned v) { set_le32(d, get_le32(d) & v); return *this; }
LE32& operator |= (unsigned v) { set_le32(d, get_le32(d) | v); return *this; }
LE32& operator ^= (unsigned v) { set_le32(d, get_le32(d) ^ v); return *this; }
LE32& operator <<= (unsigned v) { set_le32(d, get_le32(d) << v); return *this; }
LE32& operator >>= (unsigned v) { set_le32(d, get_le32(d) >> v); return *this; }
operator unsigned () const { return get_le32(d); }
__packed_struct_end()
__packed_struct(LE64)
unsigned char d[8];
LE64& operator = (upx_uint64_t v) { set_le64(d, v); return *this; }
LE64& operator += (upx_uint64_t v) { set_le64(d, get_le64(d) + v); return *this; }
LE64& operator -= (upx_uint64_t v) { set_le64(d, get_le64(d) - v); return *this; }
LE64& operator *= (upx_uint64_t v) { set_le64(d, get_le64(d) * v); return *this; }
LE64& operator /= (upx_uint64_t v) { set_le64(d, get_le64(d) / v); return *this; }
LE64& operator &= (upx_uint64_t v) { set_le64(d, get_le64(d) & v); return *this; }
LE64& operator |= (upx_uint64_t v) { set_le64(d, get_le64(d) | v); return *this; }
LE64& operator ^= (upx_uint64_t v) { set_le64(d, get_le64(d) ^ v); return *this; }
LE64& operator <<= (unsigned v) { set_le64(d, get_le64(d) << v); return *this; }
LE64& operator >>= (unsigned v) { set_le64(d, get_le64(d) >> v); return *this; }
operator upx_uint64_t () const { return get_le64(d); }
__packed_struct_end()
/*************************************************************************
// global operators
**************************************************************************/
template <class T>
inline T* operator + (T* ptr, const BE16& v) { return ptr + (unsigned) v; }
template <class T>
inline T* operator + (const BE16& v, T* ptr) { return ptr + (unsigned) v; }
template <class T>
inline T* operator - (T* ptr, const BE16& v) { return ptr - (unsigned) v; }
template <class T>
inline T* operator + (T* ptr, const BE32& v) { return ptr + (unsigned) v; }
template <class T>
inline T* operator + (const BE32& v, T* ptr) { return ptr + (unsigned) v; }
template <class T>
inline T* operator - (T* ptr, const BE32& v) { return ptr - (unsigned) v; }
// these are not implemented on purpose and will cause link-time errors
template <class T> T* operator + (T* ptr, const BE64& v);
template <class T> T* operator + (const BE64& v, T* ptr);
template <class T> T* operator - (T* ptr, const BE64& v);
template <class T>
inline T* operator + (T* ptr, const LE16& v) { return ptr + (unsigned) v; }
template <class T>
inline T* operator + (const LE16& v, T* ptr) { return ptr + (unsigned) v; }
template <class T>
inline T* operator - (T* ptr, const LE16& v) { return ptr - (unsigned) v; }
template <class T>
inline T* operator + (T* ptr, const LE32& v) { return ptr + (unsigned) v; }
template <class T>
inline T* operator + (const LE32& v, T* ptr) { return ptr + (unsigned) v; }
template <class T>
inline T* operator - (T* ptr, const LE32& v) { return ptr - (unsigned) v; }
// these are not implemented on purpose and will cause link-time errors
template <class T> T* operator + (T* ptr, const LE64& v);
template <class T> T* operator + (const LE64& v, T* ptr);
template <class T> T* operator - (T* ptr, const LE64& v);
/*************************************************************************
// global overloads
**************************************************************************/
inline unsigned ALIGN_DOWN(unsigned a, const BE32& b) { return ALIGN_DOWN(a, (unsigned) b); }
inline unsigned ALIGN_DOWN(const BE32& a, unsigned b) { return ALIGN_DOWN((unsigned) a, b); }
inline unsigned ALIGN_UP (unsigned a, const BE32& b) { return ALIGN_UP (a, (unsigned) b); }
inline unsigned ALIGN_UP (const BE32& a, unsigned b) { return ALIGN_UP ((unsigned) a, b); }
inline unsigned ALIGN_DOWN(unsigned a, const LE32& b) { return ALIGN_DOWN(a, (unsigned) b); }
inline unsigned ALIGN_DOWN(const LE32& a, unsigned b) { return ALIGN_DOWN((unsigned) a, b); }
inline unsigned ALIGN_UP (unsigned a, const LE32& b) { return ALIGN_UP (a, (unsigned) b); }
inline unsigned ALIGN_UP (const LE32& a, unsigned b) { return ALIGN_UP ((unsigned) a, b); }
inline unsigned UPX_MAX(unsigned a, const BE16& b) { return UPX_MAX(a, (unsigned) b); }
inline unsigned UPX_MAX(const BE16& a, unsigned b) { return UPX_MAX((unsigned) a, b); }
inline unsigned UPX_MIN(unsigned a, const BE16& b) { return UPX_MIN(a, (unsigned) b); }
inline unsigned UPX_MIN(const BE16& a, unsigned b) { return UPX_MIN((unsigned) a, b); }
inline unsigned UPX_MAX(unsigned a, const BE32& b) { return UPX_MAX(a, (unsigned) b); }
inline unsigned UPX_MAX(const BE32& a, unsigned b) { return UPX_MAX((unsigned) a, b); }
inline unsigned UPX_MIN(unsigned a, const BE32& b) { return UPX_MIN(a, (unsigned) b); }
inline unsigned UPX_MIN(const BE32& a, unsigned b) { return UPX_MIN((unsigned) a, b); }
inline unsigned UPX_MAX(unsigned a, const LE16& b) { return UPX_MAX(a, (unsigned) b); }
inline unsigned UPX_MAX(const LE16& a, unsigned b) { return UPX_MAX((unsigned) a, b); }
inline unsigned UPX_MIN(unsigned a, const LE16& b) { return UPX_MIN(a, (unsigned) b); }
inline unsigned UPX_MIN(const LE16& a, unsigned b) { return UPX_MIN((unsigned) a, b); }
inline unsigned UPX_MAX(unsigned a, const LE32& b) { return UPX_MAX(a, (unsigned) b); }
inline unsigned UPX_MAX(const LE32& a, unsigned b) { return UPX_MAX((unsigned) a, b); }
inline unsigned UPX_MIN(unsigned a, const LE32& b) { return UPX_MIN(a, (unsigned) b); }
inline unsigned UPX_MIN(const LE32& a, unsigned b) { return UPX_MIN((unsigned) a, b); }
/*************************************************************************
// misc
**************************************************************************/
// for use with qsort()
extern "C" {
int __acc_cdecl_qsort be16_compare(const void *, const void *);
int __acc_cdecl_qsort be24_compare(const void *, const void *);
int __acc_cdecl_qsort be32_compare(const void *, const void *);
int __acc_cdecl_qsort be64_compare(const void *, const void *);
int __acc_cdecl_qsort le16_compare(const void *, const void *);
int __acc_cdecl_qsort le24_compare(const void *, const void *);
int __acc_cdecl_qsort le32_compare(const void *, const void *);
int __acc_cdecl_qsort le64_compare(const void *, const void *);
int __acc_cdecl_qsort be16_compare_signed(const void *, const void *);
int __acc_cdecl_qsort be24_compare_signed(const void *, const void *);
int __acc_cdecl_qsort be32_compare_signed(const void *, const void *);
int __acc_cdecl_qsort be64_compare_signed(const void *, const void *);
int __acc_cdecl_qsort le16_compare_signed(const void *, const void *);
int __acc_cdecl_qsort le24_compare_signed(const void *, const void *);
int __acc_cdecl_qsort le32_compare_signed(const void *, const void *);
int __acc_cdecl_qsort le64_compare_signed(const void *, const void *);
} // extern "C"
/*************************************************************************
// Provide namespaces and classes to abstract endianness policies.
//
// CTP - Compile-Time Polymorphism (templates)
// RTP - Run-Time Polymorphism (virtual functions)
**************************************************************************/
// forward declarations
namespace N_BELE_CTP {
struct BEPolicy;
struct LEPolicy;
extern const BEPolicy be_policy;
extern const LEPolicy le_policy;
}
namespace N_BELE_RTP {
struct AbstractPolicy;
struct BEPolicy;
struct LEPolicy;
extern const BEPolicy be_policy;
extern const LEPolicy le_policy;
}
namespace N_BELE_CTP {
#define BELE_CTP 1
#include "bele_policy.h"
#undef BELE_CTP
}
namespace N_BELE_RTP {
#define BELE_RTP 1
#include "bele_policy.h"
#undef BELE_RTP
}
namespace N_BELE_CTP {
inline const N_BELE_RTP::AbstractPolicy* getRTP(const BEPolicy*)
{ return &N_BELE_RTP::be_policy; }
inline const N_BELE_RTP::AbstractPolicy* getRTP(const LEPolicy*)
{ return &N_BELE_RTP::le_policy; }
}
#endif /* already included */
/* vim:set ts=4 sw=4 et: */
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