ecos: packages/services/crc/current/src/posix

annotate packages/services/crc/current/src/posix_crc.c @ 3292:7f8e529b4d82 default tip

Fix FREESCALE_EDMA_NBYTES_MLOFFYES_MLOFF() so it works with negative offsets.

author	vae
date	Wed, 29 Apr 2015 23:31:48 +0000
parents	74dbf4c3f2e1
children

rev	line source
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	1 //==========================================================================
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	2 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	3 // posix_crc.c
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	4 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	5 // POSIX CRC calculation
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	6 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	7 //==========================================================================
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	8 // ####ECOSGPLCOPYRIGHTBEGIN####
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	9 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	10 // This file is part of eCos, the Embedded Configurable Operating System.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	12 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	13 // eCos is free software; you can redistribute it and/or modify it under
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	14 // the terms of the GNU General Public License as published by the Free
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	15 // Software Foundation; either version 2 or (at your option) any later
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	16 // version.
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	17 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	18 // eCos is distributed in the hope that it will be useful, but WITHOUT
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	19 // ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	20 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	21 // for more details.
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	22 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	23 // You should have received a copy of the GNU General Public License
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	24 // along with eCos; if not, write to the Free Software Foundation, Inc.,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	25 // 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	26 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	27 // As a special exception, if other files instantiate templates or use
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	28 // macros or inline functions from this file, or you compile this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	29 // and link it with other works to produce a work based on this file,
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	30 // this file does not by itself cause the resulting work to be covered by
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	31 // the GNU General Public License. However the source code for this file
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	32 // must still be made available in accordance with section (3) of the GNU
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	33 // General Public License v2.
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	34 //
2729 74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	35 // This exception does not invalidate any other reasons why a work based
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	36 // on this file might be covered by the GNU General Public License.
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	37 // -------------------------------------------
74dbf4c3f2e1 Update all copyright banners to reflect FSF ownership; fix and improve licence text. jlarmour parents: 395 diff changeset	38 // ####ECOSGPLCOPYRIGHTEND####
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	39 //==========================================================================
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	40 //#####DESCRIPTIONBEGIN####
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	41 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	42 // Author(s): gthomas
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	43 // Contributors: gthomas,asl
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	44 // Date: 2001-01-31
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	45 // Purpose:
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	46 // Description:
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	47 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	48 // This code is part of eCos (tm).
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	49 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	50 //####DESCRIPTIONEND####
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	51 //
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	52 //==========================================================================
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	53
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	54 #include <cyg/crc/crc.h>
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	55
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	56 // Compute a CRC, using the POSIX 1003 definition
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	57
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	58 // Same basic algorithm as CRC-16, but the bits are defined in the
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	59 // opposite order. This computation matches the output of the
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	60 // Linux 'cksum' program.
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	61
395 9f81d6e38c3d Fixed 32-bit reliance. asl parents: 277 diff changeset	62 static const cyg_uint32 posix_crc32_tab[] = {
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	63 0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B, 0x1A864DB2, 0x1E475005,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	64 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, 0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	65 0x4C11DB70, 0x48D0C6C7, 0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	66 0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, 0x709F7B7A, 0x745E66CD,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	67 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039, 0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	68 0xBE2B5B58, 0xBAEA46EF, 0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	69 0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB, 0xCEB42022, 0xCA753D95,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	70 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, 0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	71 0x34867077, 0x30476DC0, 0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	72 0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4, 0x0808D07D, 0x0CC9CDCA,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	73 0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE, 0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	74 0x5E9F46BF, 0x5A5E5B08, 0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	75 0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC, 0xB6238B25, 0xB2E29692,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	76 0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6, 0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	77 0xE0B41DE7, 0xE4750050, 0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	78 0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34, 0xDC3ABDED, 0xD8FBA05A,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	79 0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637, 0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	80 0x4F040D56, 0x4BC510E1, 0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	81 0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, 0x3F9B762C, 0x3B5A6B9B,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	82 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF, 0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	83 0xF12F560E, 0xF5EE4BB9, 0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	84 0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, 0xCDA1F604, 0xC960EBB3,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	85 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, 0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	86 0x9B3660C6, 0x9FF77D71, 0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	87 0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2, 0x470CDD2B, 0x43CDC09C,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	88 0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8, 0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	89 0x119B4BE9, 0x155A565E, 0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	90 0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A, 0x2D15EBE3, 0x29D4F654,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	91 0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0, 0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	92 0xE3A1CBC1, 0xE760D676, 0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	93 0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662, 0x933EB0BB, 0x97FFAD0C,
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	94 0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668, 0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	95 };
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	96
395 9f81d6e38c3d Fixed 32-bit reliance. asl parents: 277 diff changeset	97 cyg_uint32
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	98 cyg_posix_crc32(unsigned char *s, int len)
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	99 {
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	100 int i;
395 9f81d6e38c3d Fixed 32-bit reliance. asl parents: 277 diff changeset	101 cyg_uint32 crc32val;
277 544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	102 unsigned long length;
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	103
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	104 crc32val = 0;
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	105 for (i = 0; i < len; i++) {
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	106 crc32val = (crc32val << 8) ^ posix_crc32_tab[((crc32val >> 24) ^ *s++) & 0xFF];
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	107 }
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	108 length = len;
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	109 while (length > 0) {
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	110 crc32val = (crc32val << 8) ^ posix_crc32_tab[((crc32val >> 24) ^ length) & 0xFF];
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	111 length >>= 8;
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	112 }
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	113 crc32val = ~crc32val;
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	114 return crc32val;
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	115 }
544b77bfb6d5 * Created a new package from the CRC routines asl parents: diff changeset	116

Mercurial > ecos

annotate packages/services/crc/current/src/posix_crc.c @ 3292:7f8e529b4d82 default tip