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Add crc14.cpp
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8584 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
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lib/crc.f90
17
lib/crc.f90
@ -1,6 +1,23 @@
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module crc
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use, intrinsic :: iso_c_binding, only: c_int, c_loc, c_int8_t, c_bool, c_short
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interface
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function crc14 (data, length) bind (C, name="crc14")
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use, intrinsic :: iso_c_binding, only: c_short, c_ptr, c_int
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implicit none
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integer (c_short) :: crc14
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type (c_ptr), value :: data
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integer (c_int), value :: length
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end function crc14
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function crc14_check (data, length) bind (C, name="crc16_check")
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use, intrinsic :: iso_c_binding, only: c_bool, c_ptr, c_int
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implicit none
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logical (c_bool) :: crc14_check
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type (c_ptr), value :: data
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integer (c_int), value :: length
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end function crc14_check
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function crc12 (data, length) bind (C, name="crc12")
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use, intrinsic :: iso_c_binding, only: c_short, c_ptr, c_int
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implicit none
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31
lib/crc14.cpp
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31
lib/crc14.cpp
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#include <boost/crc.hpp>
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#include <boost/config.hpp>
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extern "C"
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{
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short crc14 (unsigned char const * data, int length);
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bool crc14_check (unsigned char const * data, int length);
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}
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#define POLY 0x2757
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#ifdef BOOST_NO_CXX11_CONSTEXPR
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#define TRUNCATED_POLYNOMIAL POLY
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#else
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namespace
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{
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unsigned long constexpr TRUNCATED_POLYNOMIAL = POLY;
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}
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#endif
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// assumes CRC is last 14 bits of the data and is set to zero
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// caller should assign the returned CRC into the message in big endian byte order
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short crc14 (unsigned char const * data, int length)
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{
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return boost::augmented_crc<14, TRUNCATED_POLYNOMIAL> (data, length);
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}
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bool crc14_check (unsigned char const * data, int length)
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{
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return !boost::augmented_crc<14, TRUNCATED_POLYNOMIAL> (data, length);
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}
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