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+/* lzo1_d.ch -- common decompression stuff
+
+ This file is part of the LZO real-time data compression library.
+
+ Copyright (C) 2008 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2007 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2006 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2005 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2004 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2003 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2002 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2001 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 2000 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1999 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1998 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1997 Markus Franz Xaver Johannes Oberhumer
+ Copyright (C) 1996 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
+# 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 postion
+//
+// The fastest decompressor results when testing for no overruns
+// and using LZO_EOF_CODE.
+************************************************************************/
+
+#undef TEST_IP
+#undef TEST_OP
+#undef TEST_LB
+#undef TEST_LBO
+#undef NEED_IP
+#undef NEED_OP
+#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
+# 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
+# endif
+#endif
+
+#if defined(LZO_TEST_OVERRUN_LOOKBEHIND)
+# define TEST_LB(m_pos) if (m_pos < out || m_pos >= op) goto lookbehind_overrun
+# define TEST_LBO(m_pos,o) if (m_pos < out || 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
+#else
+# define TEST_IP 1
+#endif
+#if defined(TEST_OP)
+# define HAVE_TEST_OP
+#else
+# define TEST_OP 1
+#endif
+
+#if defined(NEED_IP)
+# define HAVE_NEED_IP
+#else
+# define NEED_IP(x) ((void) 0)
+#endif
+#if defined(NEED_OP)
+# define HAVE_NEED_OP
+#else
+# define NEED_OP(x) ((void) 0)
+#endif
+
+
+#if defined(HAVE_TEST_IP) || defined(HAVE_NEED_IP)
+# define HAVE_ANY_IP
+#endif
+#if defined(HAVE_TEST_OP) || defined(HAVE_NEED_OP)
+# define HAVE_ANY_OP
+#endif
+
+
+
+/*
+vi:ts=4:et
+*/
+