From 1cb52da49230c64c3719b4ab944ba1cf5a9abb92 Mon Sep 17 00:00:00 2001 From: Tom Rondeau Date: Sun, 24 Jul 2011 13:25:27 -0400 Subject: digital: moved CRC32 from gnuradio-core to gr-digital. Also added QA code for it. --- gr-digital/lib/digital_crc32.cc | 130 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 130 insertions(+) create mode 100644 gr-digital/lib/digital_crc32.cc (limited to 'gr-digital/lib/digital_crc32.cc') diff --git a/gr-digital/lib/digital_crc32.cc b/gr-digital/lib/digital_crc32.cc new file mode 100644 index 000000000..8806d6e9c --- /dev/null +++ b/gr-digital/lib/digital_crc32.cc @@ -0,0 +1,130 @@ +/* -*- c++ -*- */ +/* + * Copyright 2005,2011 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio 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 3, or (at your option) + * any later version. + * + * GNU Radio 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 GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +/* + * See also ISO 3309 [ISO-3309] or ITU-T V.42 [ITU-V42] for a formal specification. + */ + +#ifdef HAVE_CONFIG_H +#include +#endif +#include + + +// Automatically generated CRC function +// polynomial: 0x104C11DB7 +unsigned int +digital_update_crc32(unsigned int crc, const unsigned char *data, size_t len) +{ + static const unsigned int table[256] = { + 0x00000000U,0x04C11DB7U,0x09823B6EU,0x0D4326D9U, + 0x130476DCU,0x17C56B6BU,0x1A864DB2U,0x1E475005U, + 0x2608EDB8U,0x22C9F00FU,0x2F8AD6D6U,0x2B4BCB61U, + 0x350C9B64U,0x31CD86D3U,0x3C8EA00AU,0x384FBDBDU, + 0x4C11DB70U,0x48D0C6C7U,0x4593E01EU,0x4152FDA9U, + 0x5F15ADACU,0x5BD4B01BU,0x569796C2U,0x52568B75U, + 0x6A1936C8U,0x6ED82B7FU,0x639B0DA6U,0x675A1011U, + 0x791D4014U,0x7DDC5DA3U,0x709F7B7AU,0x745E66CDU, + 0x9823B6E0U,0x9CE2AB57U,0x91A18D8EU,0x95609039U, + 0x8B27C03CU,0x8FE6DD8BU,0x82A5FB52U,0x8664E6E5U, + 0xBE2B5B58U,0xBAEA46EFU,0xB7A96036U,0xB3687D81U, + 0xAD2F2D84U,0xA9EE3033U,0xA4AD16EAU,0xA06C0B5DU, + 0xD4326D90U,0xD0F37027U,0xDDB056FEU,0xD9714B49U, + 0xC7361B4CU,0xC3F706FBU,0xCEB42022U,0xCA753D95U, + 0xF23A8028U,0xF6FB9D9FU,0xFBB8BB46U,0xFF79A6F1U, + 0xE13EF6F4U,0xE5FFEB43U,0xE8BCCD9AU,0xEC7DD02DU, + 0x34867077U,0x30476DC0U,0x3D044B19U,0x39C556AEU, + 0x278206ABU,0x23431B1CU,0x2E003DC5U,0x2AC12072U, + 0x128E9DCFU,0x164F8078U,0x1B0CA6A1U,0x1FCDBB16U, + 0x018AEB13U,0x054BF6A4U,0x0808D07DU,0x0CC9CDCAU, + 0x7897AB07U,0x7C56B6B0U,0x71159069U,0x75D48DDEU, + 0x6B93DDDBU,0x6F52C06CU,0x6211E6B5U,0x66D0FB02U, + 0x5E9F46BFU,0x5A5E5B08U,0x571D7DD1U,0x53DC6066U, + 0x4D9B3063U,0x495A2DD4U,0x44190B0DU,0x40D816BAU, + 0xACA5C697U,0xA864DB20U,0xA527FDF9U,0xA1E6E04EU, + 0xBFA1B04BU,0xBB60ADFCU,0xB6238B25U,0xB2E29692U, + 0x8AAD2B2FU,0x8E6C3698U,0x832F1041U,0x87EE0DF6U, + 0x99A95DF3U,0x9D684044U,0x902B669DU,0x94EA7B2AU, + 0xE0B41DE7U,0xE4750050U,0xE9362689U,0xEDF73B3EU, + 0xF3B06B3BU,0xF771768CU,0xFA325055U,0xFEF34DE2U, + 0xC6BCF05FU,0xC27DEDE8U,0xCF3ECB31U,0xCBFFD686U, + 0xD5B88683U,0xD1799B34U,0xDC3ABDEDU,0xD8FBA05AU, + 0x690CE0EEU,0x6DCDFD59U,0x608EDB80U,0x644FC637U, + 0x7A089632U,0x7EC98B85U,0x738AAD5CU,0x774BB0EBU, + 0x4F040D56U,0x4BC510E1U,0x46863638U,0x42472B8FU, + 0x5C007B8AU,0x58C1663DU,0x558240E4U,0x51435D53U, + 0x251D3B9EU,0x21DC2629U,0x2C9F00F0U,0x285E1D47U, + 0x36194D42U,0x32D850F5U,0x3F9B762CU,0x3B5A6B9BU, + 0x0315D626U,0x07D4CB91U,0x0A97ED48U,0x0E56F0FFU, + 0x1011A0FAU,0x14D0BD4DU,0x19939B94U,0x1D528623U, + 0xF12F560EU,0xF5EE4BB9U,0xF8AD6D60U,0xFC6C70D7U, + 0xE22B20D2U,0xE6EA3D65U,0xEBA91BBCU,0xEF68060BU, + 0xD727BBB6U,0xD3E6A601U,0xDEA580D8U,0xDA649D6FU, + 0xC423CD6AU,0xC0E2D0DDU,0xCDA1F604U,0xC960EBB3U, + 0xBD3E8D7EU,0xB9FF90C9U,0xB4BCB610U,0xB07DABA7U, + 0xAE3AFBA2U,0xAAFBE615U,0xA7B8C0CCU,0xA379DD7BU, + 0x9B3660C6U,0x9FF77D71U,0x92B45BA8U,0x9675461FU, + 0x8832161AU,0x8CF30BADU,0x81B02D74U,0x857130C3U, + 0x5D8A9099U,0x594B8D2EU,0x5408ABF7U,0x50C9B640U, + 0x4E8EE645U,0x4A4FFBF2U,0x470CDD2BU,0x43CDC09CU, + 0x7B827D21U,0x7F436096U,0x7200464FU,0x76C15BF8U, + 0x68860BFDU,0x6C47164AU,0x61043093U,0x65C52D24U, + 0x119B4BE9U,0x155A565EU,0x18197087U,0x1CD86D30U, + 0x029F3D35U,0x065E2082U,0x0B1D065BU,0x0FDC1BECU, + 0x3793A651U,0x3352BBE6U,0x3E119D3FU,0x3AD08088U, + 0x2497D08DU,0x2056CD3AU,0x2D15EBE3U,0x29D4F654U, + 0xC5A92679U,0xC1683BCEU,0xCC2B1D17U,0xC8EA00A0U, + 0xD6AD50A5U,0xD26C4D12U,0xDF2F6BCBU,0xDBEE767CU, + 0xE3A1CBC1U,0xE760D676U,0xEA23F0AFU,0xEEE2ED18U, + 0xF0A5BD1DU,0xF464A0AAU,0xF9278673U,0xFDE69BC4U, + 0x89B8FD09U,0x8D79E0BEU,0x803AC667U,0x84FBDBD0U, + 0x9ABC8BD5U,0x9E7D9662U,0x933EB0BBU,0x97FFAD0CU, + 0xAFB010B1U,0xAB710D06U,0xA6322BDFU,0xA2F33668U, + 0xBCB4666DU,0xB8757BDAU,0xB5365D03U,0xB1F740B4U, + }; + + while (len > 0) + { + crc = table[*data ^ ((crc >> 24) & 0xff)] ^ (crc << 8); + data++; + len--; + } + return crc; +} + +unsigned int +digital_update_crc32(unsigned int crc, const std::string s) +{ + return digital_update_crc32(crc, (const unsigned char *) s.data(), s.size()); +} + +unsigned int +digital_crc32(const unsigned char *buf, size_t len) +{ + return digital_update_crc32(0xffffffff, buf, len) ^ 0xffffffff; +} + +unsigned int +digital_crc32(const std::string s) +{ + return digital_crc32((const unsigned char *) s.data(), s.size()); +} -- cgit