libcw/cwCommonImpl.h

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C
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#ifndef cwCommonImpl_H
#define cwCommonImpl_H
#include "config.h"
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#include <cstdlib>
#include <cstring>
#include <cassert>
#include <cctype>
#include <cerrno>
#include <climits>
#include <cinttypes>
#include <cfloat>
#include <cmath>
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#include <algorithm> // std::min,std::max
#include <utility> // std::forward
#include <limits> // std::numeric_limits<
#include <atomic>
#include <cstdint>
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#if defined(OS_LINUX) || defined(OS_OSX)
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#define cwPOSIX_FILE_SYS
#include <time.h> // timespec
#include <netinet/in.h> // struct sockaddr_in
#include <unistd.h> // close()
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#define cwPathSeparatorChar '/'
#endif
#define cwStringNullGuard(s) ((s)==nullptr ? "" : (s))
// Perform byte swapping on 16 bit values.
#define cwSwap16(x) \
(((((unsigned short)(x)) & 0x00ff) << 8) | ((((unsigned short)(x)) & 0xff00) >> 8))
#ifdef OS_LINUX
#include <byteswap.h> // gcc specific
#include <unistd.h>
// Perform byte swapping on 32 bit values on systems were <byteswap.h> is available.
#define cwSwap32(x) (bswap_32(x))
// Perform byte swapping on 64 bit values on systems were <byteswap.h> is available.
#define cwSwap64(x) (bswap_64(x))
#endif
#ifdef OS_OSX
#include <unistd.h>
// Perform byte swapping on 32 bit values on systems were <byteswap.h> is not available.
#define cwSwap32(x) \
((((unsigned)((x) & 0x000000FF)) << 24) | \
(((unsigned)((x) & 0x0000FF00)) << 8) | \
(((unsigned)((x) & 0x00FF0000)) >> 8) | \
(((unsigned)((x) & 0xFF000000)) >> 24))
// Perform byte swapping on 64 bit values on systems were <byteswap.h> is not available.
#define cwSwap64(x) \
(((((unsigned long long)(x))<<56) & 0xFF00000000000000ULL) | \
((((unsigned long long)(x))<<40) & 0x00FF000000000000ULL) | \
((((unsigned long long)(x))<<24) & 0x0000FF0000000000ULL) | \
((((unsigned long long)(x))<< 8) & 0x000000FF00000000ULL) | \
((((unsigned long long)(x))>> 8) & 0x00000000FF000000ULL) | \
((((unsigned long long)(x))>>24) & 0x0000000000FF0000ULL) | \
((((unsigned long long)(x))>>40) & 0x000000000000FF00ULL) | \
((((unsigned long long)(x))>>56) & 0x00000000000000FFULL))
#endif
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#define cwAllFlags(f,m) (((f) & (m)) == (m)) // Test if all of a group 'm' of binary flags in 'f' are set.
#define cwIsFlag(f,m) (((f) & (m)) ? true : false) // Test if any one of a the bits in 'm' is also set in 'f'.
#define cwIsNotFlag(f,m) (cwIsFlag(f,m)==false) // Test if none of the bits in 'm' are set in 'f'.
#define cwSetFlag(f,m) ((f) | (m)) // Return 'f' with the bits in 'm' set.
#define cwClrFlag(f,m) ((f) & (~(m))) // Return 'f' with the bits in 'm' cleared.
#define cwTogFlag(f,m) ((f)^(m)) // Return 'f' with the bits in 'm' toggled.
#define cwEnaFlag(f,m,b) ((b) ? cwSetFlag(f,m) : cwClrFlag(f,m)) // Set or clear bits in 'f' based on bits in 'm' and the state of 'b'.
// In-place assignment version of the above bit operations
#define cwSetBits(f,m) ((f) |= (m)) // Set 'f' with the bits in 'm' set.
#define cwClrBits(f,m) ((f) &= (~(m))) // Set 'f' with the bits in 'm' cleared.
#define cwTogBits(f,m) ((f)^=(m)) // Return 'f' with the bits in 'm' toggled.
#define cwEnaBits(f,m,b) ((b) ? cwSetBits(f,m) : cwClrBits(f,m)) // Set or clear bits in 'f' based on bits in 'm' and the state of 'b'.
#define cwCountOf(a) (sizeof(a)/sizeof(a[0]))
// Taken from here:
// https://groups.google.com/forum/#!topic/comp.std.c/d-6Mj5Lko_s
// and here:
// https://stackoverflow.com/questions/4421681/how-to-count-the-number-of-arguments-passed-to-a-function-that-accepts-a-variabl
#define cwPP_NARG(...) \
cwPP_NARG_(__VA_ARGS__,cwPP_RSEQ_N())
#define cwPP_NARG_(...) \
cwPP_128TH_ARG(__VA_ARGS__)
#define cwPP_128TH_ARG( \
_1, _2, _3, _4, _5, _6, _7, _8, _9,_10, \
_11,_12,_13,_14,_15,_16,_17,_18,_19,_20, \
_21,_22,_23,_24,_25,_26,_27,_28,_29,_30, \
_31,_32,_33,_34,_35,_36,_37,_38,_39,_40, \
_41,_42,_43,_44,_45,_46,_47,_48,_49,_50, \
_51,_52,_53,_54,_55,_56,_57,_58,_59,_60, \
_61,_62,_63,_64,_65,_66,_67,_68,_69,_70, \
_71,_72,_73,_74,_75,_76,_77,_78,_79,_80, \
_81,_82,_83,_84,_85,_86,_87,_88,_89,_90, \
_91,_92,_93,_94,_95,_96,_97,_98,_99,_100, \
_101,_102,_103,_104,_105,_106,_107,_108,_109,_110, \
_111,_112,_113,_114,_115,_116,_117,_118,_119,_120, \
_121,_122,_123,_124,_125,_126,_127,N,...) N
#define cwPP_RSEQ_N() \
127,126,125,124,123,122,121,120, \
119,118,117,116,115,114,113,112,111,110, \
109,108,107,106,105,104,103,102,101,100, \
99,98,97,96,95,94,93,92,91,90, \
89,88,87,86,85,84,83,82,81,80, \
79,78,77,76,75,74,73,72,71,70, \
69,68,67,66,65,64,63,62,61,60, \
59,58,57,56,55,54,53,52,51,50, \
49,48,47,46,45,44,43,42,41,40, \
39,38,37,36,35,34,33,32,31,30, \
29,28,27,26,25,24,23,22,21,20, \
19,18,17,16,15,14,13,12,11,10, \
9,8,7,6,5,4,3,2,1,0
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namespace cw
{
#define cwAssert(cond) while(1){ if(!(cond)){ cwLogFatal(kAssertFailRC,"Assert failed on condition:%s",#cond ); } break; }
template< typename T>
bool is_int(const T& x)
{ return false; }
template<> inline bool is_int<signed char>( const signed char& x ) { return true; }
template<> inline bool is_int<unsigned char>( const unsigned char& x ) { return true; }
template<> inline bool is_int<signed short>( const signed short& x ) { return true; }
template<> inline bool is_int<unsigned short>( const unsigned short& x ) { return true; }
template<> inline bool is_int<signed long>( const signed long& x ) { return true; }
template<> inline bool is_int<unsigned long>( const unsigned long& x ) { return true; }
template<> inline bool is_int<signed long long>( const signed long long& x ) { return true; }
template<> inline bool is_int<unsigned long long>( const unsigned long long& x ) { return true; }
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template< typename H, typename T >
T* handleToPtr( H h )
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{
cwAssert( h.p != nullptr );
return h.p;
}
typedef struct idLabelPair_str
{
unsigned id;
const char* label;
} idLabelPair_t;
const char* idToLabel( const idLabelPair_t* array, unsigned id, unsigned eolId );
unsigned labelToId( const idLabelPair_t* array, const char* label, unsigned eolId );
inline rc_t rcSelect() { return kOkRC; }
template<typename T, typename... ARGS>
rc_t rcSelect(T rc, ARGS... args)
{
if( rc != kOkRC )
return rc;
return rcSelect(args...);
}
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void sleepSec( unsigned secs ); // sleep seconds
void sleepMs( unsigned ms ); // sleep milliseconds
void sleepUs( unsigned us ); // sleep seconds
void sleepNs( unsigned ns ); // sleep nanoseconds
}
#endif