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/* lzo1_d.ch -- common decompression stuff
This file is part of the LZO real-time data compression library.
Copyright (C) 1996-2015 Markus Franz Xaver Johannes Oberhumer
All Rights Reserved.
The LZO library is free software; you can redistribute it and/or
modify it 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.
The LZO library 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 the LZO library; see the file COPYING.
If not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Markus F.X.J. Oberhumer
<markus@oberhumer.com>
http://www.oberhumer.com/opensource/lzo/
*/
#if defined(LZO_TEST_OVERRUN)
# if !defined(LZO_TEST_OVERRUN_INPUT)
# define LZO_TEST_OVERRUN_INPUT 2
# endif
# if !defined(LZO_TEST_OVERRUN_OUTPUT)
# define LZO_TEST_OVERRUN_OUTPUT 2
# endif
# if !defined(LZO_TEST_OVERRUN_LOOKBEHIND)
# define LZO_TEST_OVERRUN_LOOKBEHIND 1
# endif
#endif
/***********************************************************************
// Overrun detection is internally handled by these macros:
//
// TEST_IP test input overrun at loop begin
// NEED_IP test input overrun at every input byte
//
// TEST_OP test output overrun at loop begin
// NEED_OP test output overrun at every output byte
//
// TEST_LB test match position
//
// The fastest decompressor results when testing for no overruns
// and using LZO_EOF_CODE.
************************************************************************/
#undef TEST_IP
#undef TEST_OP
#undef TEST_IP_AND_TEST_OP
#undef TEST_LB
#undef TEST_LBO
#undef NEED_IP
#undef NEED_OP
#undef TEST_IV
#undef TEST_OV
#undef HAVE_TEST_IP
#undef HAVE_TEST_OP
#undef HAVE_NEED_IP
#undef HAVE_NEED_OP
#undef HAVE_ANY_IP
#undef HAVE_ANY_OP
#if defined(LZO_TEST_OVERRUN_INPUT)
# if (LZO_TEST_OVERRUN_INPUT >= 1)
# define TEST_IP (ip < ip_end)
# endif
# if (LZO_TEST_OVERRUN_INPUT >= 2)
# define NEED_IP(x) \
if ((lzo_uint)(ip_end - ip) < (lzo_uint)(x)) goto input_overrun
# define TEST_IV(x) if ((x) > (lzo_uint)0 - (511)) goto input_overrun
# endif
#endif
#if defined(LZO_TEST_OVERRUN_OUTPUT)
# if (LZO_TEST_OVERRUN_OUTPUT >= 1)
# define TEST_OP (op <= op_end)
# endif
# if (LZO_TEST_OVERRUN_OUTPUT >= 2)
# undef TEST_OP /* don't need both of the tests here */
# define NEED_OP(x) \
if ((lzo_uint)(op_end - op) < (lzo_uint)(x)) goto output_overrun
# define TEST_OV(x) if ((x) > (lzo_uint)0 - (511)) goto output_overrun
# endif
#endif
#if defined(LZO_TEST_OVERRUN_LOOKBEHIND)
# define TEST_LB(m_pos) if (PTR_LT(m_pos,out) || PTR_GE(m_pos,op)) goto lookbehind_overrun
# define TEST_LBO(m_pos,o) if (PTR_LT(m_pos,out) || PTR_GE(m_pos,op-(o))) goto lookbehind_overrun
#else
# define TEST_LB(m_pos) ((void) 0)
# define TEST_LBO(m_pos,o) ((void) 0)
#endif
#if !defined(LZO_EOF_CODE) && !defined(TEST_IP)
/* if we have no EOF code, we have to test for the end of the input */
# define TEST_IP (ip < ip_end)
#endif
#if defined(TEST_IP)
# define HAVE_TEST_IP 1
#else
# define TEST_IP 1
#endif
#if defined(TEST_OP)
# define HAVE_TEST_OP 1
#else
# define TEST_OP 1
#endif
#if defined(HAVE_TEST_IP) && defined(HAVE_TEST_OP)
# define TEST_IP_AND_TEST_OP (TEST_IP && TEST_OP)
#elif defined(HAVE_TEST_IP)
# define TEST_IP_AND_TEST_OP TEST_IP
#elif defined(HAVE_TEST_OP)
# define TEST_IP_AND_TEST_OP TEST_OP
#else
# define TEST_IP_AND_TEST_OP 1
#endif
#if defined(NEED_IP)
# define HAVE_NEED_IP 1
#else
# define NEED_IP(x) ((void) 0)
# define TEST_IV(x) ((void) 0)
#endif
#if defined(NEED_OP)
# define HAVE_NEED_OP 1
#else
# define NEED_OP(x) ((void) 0)
# define TEST_OV(x) ((void) 0)
#endif
#if defined(HAVE_TEST_IP) || defined(HAVE_NEED_IP)
# define HAVE_ANY_IP 1
#endif
#if defined(HAVE_TEST_OP) || defined(HAVE_NEED_OP)
# define HAVE_ANY_OP 1
#endif
/* vim:set ts=4 sw=4 et: */
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