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annotate packages/services/crc/current/include/crc.h @ 2729:74dbf4c3f2e1 after-copyright-change-20090129

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Update all copyright banners to reflect FSF ownership; fix and improve licence text.
author jlarmour
date Thu, 29 Jan 2009 17:47:46 +0000
parents 9f81d6e38c3d
children
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1 //==========================================================================
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2 //
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3 // crc.h
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4 //
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5 // Interface for the CRC algorithms.
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6 //
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7 //==========================================================================
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8 // ####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 2002 Free Software Foundation, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later
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16 // version.
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17 //
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18 // eCos is distributed in the hope that it will be useful, but WITHOUT
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19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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21 // for more details.
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22 //
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23 // You should have received a copy of the GNU General Public License
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24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
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25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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26 //
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27 // As a special exception, if other files instantiate templates or use
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28 // macros or inline functions from this file, or you compile this file
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29 // and link it with other works to produce a work based on this file,
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30 // this file does not by itself cause the resulting work to be covered by
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31 // the GNU General Public License. However the source code for this file
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32 // must still be made available in accordance with section (3) of the GNU
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33 // General Public License v2.
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34 //
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35 // This exception does not invalidate any other reasons why a work based
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36 // on this file might be covered by the GNU General Public License.
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37 // -------------------------------------------
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38 // ####ECOSGPLCOPYRIGHTEND####
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39 //==========================================================================
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40 //#####DESCRIPTIONBEGIN####
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41 //
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42 // Author(s): Andrew Lunn
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43 // Contributors: Andrew Lunn
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44 // Date: 2002-08-06
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45 // Purpose:
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46 // Description:
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47 //
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48 // This code is part of eCos (tm).
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49 //
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50 //####DESCRIPTIONEND####
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51 //
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52 //==========================================================================
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53
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54 #ifndef _SERVICES_CRC_CRC_H_
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55 #define _SERVICES_CRC_CRC_H_
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56
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57 #include <cyg/infra/cyg_type.h>
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58
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59 #ifndef __externC
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60 # ifdef __cplusplus
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61 # define __externC extern "C"
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62 # else
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63 # define __externC extern
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64 # endif
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65 #endif
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66
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67 // Compute a CRC, using the POSIX 1003 definition
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68
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69 __externC cyg_uint32
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70 cyg_posix_crc32(unsigned char *s, int len);
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71
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72 // Gary S. Brown's 32 bit CRC
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73
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74 __externC cyg_uint32
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75 cyg_crc32(unsigned char *s, int len);
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76
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77 // Gary S. Brown's 32 bit CRC, but accumulate the result from a
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78 // previous CRC calculation
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79
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80 __externC cyg_uint32
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81 cyg_crc32_accumulate(cyg_uint32 crc, unsigned char *s, int len);
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82
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83 // Ethernet FCS Algorithm
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84
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85 __externC cyg_uint32
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86 cyg_ether_crc32(unsigned char *s, int len);
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87
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88 // Ethernet FCS algorithm, but accumulate the result from a previous
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89 // CRC calculation.
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90
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91 __externC cyg_uint32
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92 cyg_ether_crc32_accumulate(cyg_uint32 crc, unsigned char *s, int len);
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93
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94 // 16 bit CRC with polynomial x^16+x^12+x^5+1
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95
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96 __externC cyg_uint16
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97 cyg_crc16(unsigned char *s, int len);
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98
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99 #endif // _SERVICES_CRC_CRC_H_
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100
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