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Merging from trunk:

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r7896 | bsomervi | 2017-07-16 15:32:28 +0100 (Sun, 16 Jul 2017) | 5 lines

Improve support for older C++ compilers

Some current  Linux distributions  are still using  GCC 4.6  which has
no/poor  C++11 support.  probably more  of this  needed if  we are  to
support such compilers.
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r7897 | bsomervi | 2017-07-16 15:32:48 +0100 (Sun, 16 Jul 2017) | 3 lines

Improved rig control start up behavour

Avoid trying to set bogus uninitialized frequency values.
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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx-1.8@7898 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
This commit is contained in:
Bill Somerville
2017-07-16 14:38:24 +00:00
parent 7da7fd8e8c
commit fd2d94cc7e
5 changed files with 76 additions and 60 deletions
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lib/crc12.cpp
+10 -3
View File
@@ -1,4 +1,5 @@
#include <boost/crc.hpp>
#include <boost/config.hpp>
extern "C"
{
@@ -6,19 +7,25 @@ extern "C"
bool crc12_check (unsigned char const * data, int length);
}
#define POLY 0xc06
#ifdef BOOST_NO_CXX11_CONSTEXPR
#define TRUNCATED_POLYNOMIAL POLY
#else
namespace
{
unsigned long constexpr truncated_polynomial = 0xc06;
unsigned long constexpr TRUNCATED_POLYNOMIAL = POLY;
}
#endif
// assumes CRC is last 16 bits of the data and is set to zero
// caller should assign the returned CRC into the message in big endian byte order
short crc12 (unsigned char const * data, int length)
{
return boost::augmented_crc<12, truncated_polynomial> (data, length);
return boost::augmented_crc<12, TRUNCATED_POLYNOMIAL> (data, length);
}
bool crc12_check (unsigned char const * data, int length)
{
return !boost::augmented_crc<12, truncated_polynomial> (data, length);
return !boost::augmented_crc<12, TRUNCATED_POLYNOMIAL> (data, length);
}