From 2749c0bfbfed432e5cc8cba96b7732753c9ad1a2 Mon Sep 17 00:00:00 2001 From: Sylvain Munaut Date: Fri, 16 Sep 2011 22:59:18 +0200 Subject: core: Add generic CRC functions (templates expended to 8 16 32 64 bits) Signed-off-by: Sylvain Munaut --- include/osmocom/core/Makefile.am | 7 ++++- include/osmocom/core/crcXXgen.h.tpl | 59 +++++++++++++++++++++++++++++++++++++ include/osmocom/core/crcgen.h | 41 ++++++++++++++++++++++++++ 3 files changed, 106 insertions(+), 1 deletion(-) create mode 100644 include/osmocom/core/crcXXgen.h.tpl create mode 100644 include/osmocom/core/crcgen.h (limited to 'include') diff --git a/include/osmocom/core/Makefile.am b/include/osmocom/core/Makefile.am index f131269d..aabb775f 100644 --- a/include/osmocom/core/Makefile.am +++ b/include/osmocom/core/Makefile.am @@ -3,7 +3,8 @@ osmocore_HEADERS = signal.h linuxlist.h timer.h select.h msgb.h bits.h \ gsmtap.h write_queue.h prim.h \ logging.h rate_ctr.h gsmtap_util.h \ crc16.h panic.h process.h \ - backtrace.h conv.h application.h + backtrace.h conv.h application.h \ + crcgen.h crc8gen.h crc16gen.h crc32gen.h crc64gen.h if ENABLE_PLUGIN osmocore_HEADERS += plugin.h @@ -22,3 +23,7 @@ osmocore_HEADERS += serial.h endif osmocoredir = $(includedir)/osmocom/core + +crc%gen.h: crcXXgen.h.tpl + @echo " SED $< -> $@" + @sed -e's/XX/$*/g' $< > $@ diff --git a/include/osmocom/core/crcXXgen.h.tpl b/include/osmocom/core/crcXXgen.h.tpl new file mode 100644 index 00000000..b411276e --- /dev/null +++ b/include/osmocom/core/crcXXgen.h.tpl @@ -0,0 +1,59 @@ +/* + * crcXXgen.h + * + * Copyright (C) 2011 Sylvain Munaut + * + * All Rights Reserved + * + * This program 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 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef __OSMO_CRCXXGEN_H__ +#define __OSMO_CRCXXGEN_H__ + +/*! \addtogroup crcgen + * @{ + */ + +/*! \file crcXXgen.h + * \file Osmocom generic CRC routines (for max XX bits poly) header + */ + + +#include +#include + + +/*! \brief structure describing a given CRC code of max XX bits */ +struct osmo_crcXXgen_code { + int bits; /*!< \brief Actual number of bits of the CRC */ + uintXX_t poly; /*!< \brief Polynom (normal representation, MSB omitted */ + uintXX_t init; /*!< \brief Initialization value of the CRC state */ + uintXX_t remainder; /*!< \brief Remainder of the CRC (final XOR) */ +}; + +uintXX_t osmo_crcXXgen_compute_bits(const struct osmo_crcXXgen_code *code, + const ubit_t *in, int len); +int osmo_crcXXgen_check_bits(const struct osmo_crcXXgen_code *code, + const ubit_t *in, int len, const ubit_t *crc_bits); +void osmo_crcXXgen_set_bits(const struct osmo_crcXXgen_code *code, + const ubit_t *in, int len, ubit_t *crc_bits); + + +/*! }@ */ + +#endif /* __OSMO_CRCXXGEN_H__ */ + +/* vim: set syntax=c: */ diff --git a/include/osmocom/core/crcgen.h b/include/osmocom/core/crcgen.h new file mode 100644 index 00000000..cd916c76 --- /dev/null +++ b/include/osmocom/core/crcgen.h @@ -0,0 +1,41 @@ +/* + * crcgen.h + * + * Copyright (C) 2011 Sylvain Munaut + * + * All Rights Reserved + * + * This program 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 2 of the License, or + * (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifndef __OSMO_CRCGEN_H__ +#define __OSMO_CRCGEN_H__ + +/*! \defgroup crcgen Osmocom generic CRC routines + * @{ + */ + +/*! \file crcgen.h + * \file Osmocom generic CRC routines global header + */ + +#include +#include +#include +#include + +/*! }@ */ + +#endif /* __OSMO_CRCGEN_H__ */ -- cgit v1.2.3