mirror of https://github.com/libAthena/athena.git
94 lines
2.7 KiB
C
94 lines
2.7 KiB
C
/* lzo1x_d3.c -- LZO1X decompression with preset dictionary
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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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#include "config1x.h"
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#define LZO_TEST_OVERRUN 1
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#define SLOW_MEMCPY(a,b,l) { do *a++ = *b++; while (--l > 0); }
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#define FAST_MEMCPY(a,b,l) { lzo_memcpy(a,b,l); a += l; }
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#if 1 && defined(FAST_MEMCPY)
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# define DICT_MEMMOVE(op,m_pos,m_len,m_off) \
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if (m_off >= (m_len)) \
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FAST_MEMCPY(op,m_pos,m_len) \
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else \
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SLOW_MEMCPY(op,m_pos,m_len)
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#else
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# define DICT_MEMMOVE(op,m_pos,m_len,m_off) \
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SLOW_MEMCPY(op,m_pos,m_len)
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#endif
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#if !defined(FAST_MEMCPY)
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# define FAST_MEMCPY SLOW_MEMCPY
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#endif
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#define COPY_DICT_DICT(m_len,m_off) \
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{ \
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const lzo_bytep m_pos; \
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m_off -= pd(op, out); assert(m_off > 0); \
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if (m_off > dict_len) goto lookbehind_overrun; \
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m_pos = dict_end - m_off; \
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if (m_len > m_off) \
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{ \
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m_len -= m_off; \
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FAST_MEMCPY(op,m_pos,m_off) \
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m_pos = out; \
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SLOW_MEMCPY(op,m_pos,m_len) \
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} \
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else \
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FAST_MEMCPY(op,m_pos,m_len) \
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}
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#define COPY_DICT(m_len,m_off) \
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assert(m_len >= 2); assert(m_off > 0); assert(op > out); \
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if (m_off <= pd(op, out)) \
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{ \
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const lzo_bytep m_pos = op - m_off; \
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DICT_MEMMOVE(op,m_pos,m_len,m_off) \
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} \
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else \
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COPY_DICT_DICT(m_len,m_off)
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LZO_PUBLIC(int)
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lzo1x_decompress_dict_safe(const lzo_bytep in, lzo_uint in_len,
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lzo_bytep out, lzo_uintp out_len,
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lzo_voidp wrkmem /* NOT USED */,
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const lzo_bytep dict, lzo_uint dict_len)
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#include "lzo1x_d.ch"
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/* vim:set ts=4 sw=4 et: */
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