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