1 | /*
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2 | This file is part of the LZO real-time data compression library.
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3 |
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4 | Copyright (C) 1996..2008 Markus Franz Xaver Johannes Oberhumer
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5 | All Rights Reserved.
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6 |
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7 | Markus F.X.J. Oberhumer <markus@oberhumer.com>
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8 | http://www.oberhumer.com/opensource/lzo/
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9 |
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10 | The LZO library is free software; you can redistribute it and/or
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11 | modify it under the terms of the GNU General Public License as
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12 | published by the Free Software Foundation; either version 2 of
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13 | the License, or (at your option) any later version.
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14 |
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15 | The LZO library is distributed in the hope that it will be useful,
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16 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 | GNU General Public License for more details.
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19 |
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20 | You should have received a copy of the GNU General Public License
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21 | along with the LZO library; see the file COPYING.
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22 | If not, write to the Free Software Foundation, Inc.,
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23 | 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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24 | */
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25 |
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26 | #include "liblzo_interface.h"
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27 |
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28 | /* lzo-2.03/src/config1x.h */
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29 | #define M2_MIN_LEN 3
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30 | #define M2_MAX_LEN 8
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31 | #define M3_MAX_LEN 33
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32 | #define M4_MAX_LEN 9
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33 | #define M1_MAX_OFFSET 0x0400
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34 | #define M2_MAX_OFFSET 0x0800
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35 | #define M3_MAX_OFFSET 0x4000
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36 | #define M4_MAX_OFFSET 0xbfff
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37 | #define M1_MARKER 0
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38 | #define M3_MARKER 32
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39 | #define M4_MARKER 16
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40 |
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41 | #define MX_MAX_OFFSET (M1_MAX_OFFSET + M2_MAX_OFFSET)
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42 | #define MIN_LOOKAHEAD (M2_MAX_LEN + 1)
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43 |
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44 | #define LZO_EOF_CODE
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45 |
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46 | /* lzo-2.03/src/lzo_dict.h */
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47 | #define GINDEX(m_pos,m_off,dict,dindex,in) m_pos = dict[dindex]
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48 | #define DX2(p,s1,s2) \
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49 | (((((unsigned)((p)[2]) << (s2)) ^ (p)[1]) << (s1)) ^ (p)[0])
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50 | //#define DA3(p,s1,s2,s3) ((DA2((p)+1,s2,s3) << (s1)) + (p)[0])
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51 | //#define DS3(p,s1,s2,s3) ((DS2((p)+1,s2,s3) << (s1)) - (p)[0])
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52 | #define DX3(p,s1,s2,s3) ((DX2((p)+1,s2,s3) << (s1)) ^ (p)[0])
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53 |
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54 | #define D_SIZE (1U << D_BITS)
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55 | #define D_MASK ((1U << D_BITS) - 1)
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56 | #define D_HIGH ((D_MASK >> 1) + 1)
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57 |
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58 | #define LZO_CHECK_MPOS_NON_DET(m_pos,m_off,in,ip,max_offset) \
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59 | ( \
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60 | m_pos = ip - (unsigned)(ip - m_pos), \
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61 | ((uintptr_t)m_pos < (uintptr_t)in \
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62 | || (m_off = (unsigned)(ip - m_pos)) <= 0 \
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63 | || m_off > max_offset) \
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64 | )
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65 |
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66 | #define DENTRY(p,in) (p)
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67 | #define UPDATE_I(dict,drun,index,p,in) dict[index] = DENTRY(p,in)
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68 |
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69 | #define DMS(v,s) ((unsigned) (((v) & (D_MASK >> (s))) << (s)))
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70 | #define DM(v) ((unsigned) ((v) & D_MASK))
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71 | #define DMUL(a,b) ((unsigned) ((a) * (b)))
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72 |
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73 | /* lzo-2.03/src/lzo_ptr.h */
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74 | #define pd(a,b) ((unsigned)((a)-(b)))
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75 |
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76 | # define TEST_IP (ip < ip_end)
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77 | # define NEED_IP(x) \
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78 | if ((unsigned)(ip_end - ip) < (unsigned)(x)) goto input_overrun
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79 |
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80 | # undef TEST_OP /* don't need both of the tests here */
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81 | # define TEST_OP 1
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82 | # define NEED_OP(x) \
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83 | if ((unsigned)(op_end - op) < (unsigned)(x)) goto output_overrun
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84 |
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85 | #define HAVE_ANY_OP 1
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86 |
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87 | //#if defined(LZO_TEST_OVERRUN_LOOKBEHIND)
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88 | # define TEST_LB(m_pos) if (m_pos < out || m_pos >= op) goto lookbehind_overrun
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89 | //# define TEST_LBO(m_pos,o) if (m_pos < out || m_pos >= op - (o)) goto lookbehind_overrun
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90 | //#else
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91 | //# define TEST_LB(m_pos) ((void) 0)
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92 | //# define TEST_LBO(m_pos,o) ((void) 0)
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93 | //#endif
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