strings.c File Reference

#include <stdlib.h>
#include <strings.h>
#include <stdint.h>

Macros
#define	ffs_func(func_name, type)
#define	popcount_func(func_name, type)

Functions
	ffs_func (ffs, int)
	ffs_func (ffsl, long)
	ffs_func (ffsll, long long)
	popcount_func (popcount, unsigned int)
	popcount_func (popcountl, unsigned long)
	popcount_func (popcountll, unsigned long long)
	popcount_func (popcount32, uint32_t)
	popcount_func (popcount64, uint64_t)

Macro Definition Documentation

#define ffs_func	(		func_name,
			type
	)

Value:

\
int func_name(type value) \
{ \
    int i; \
    int nbits = sizeof(type) * 8;\
    \
    for(i = 0; i < nbits && !(value & ((type)1 << i) ); i++);\
    \
    return (i == nbits) ? 0 : (i + 1);\
}

#define popcount_func	(		func_name,
			type
	)

Value:

\
unsigned int func_name(type value) \
{ \
    int i, bitcnt; \
    int nbits = sizeof(type) * 8; \
    \
    for(i = 0, bitcnt = 0; i < nbits; i++) \
    {\
        if( value & ((type)1 << i) )\
            bitcnt++;\
    }\
    \
    return bitcnt;\
}

Function Documentation

ffs_func	(	ffs	,
		int
	)

ffs_func	(	ffsl	,
		long
	)

ffs_func	(	ffsll	,
		long	long
	)

popcount_func	(	popcount	,
		unsigned	int
	)

popcount_func	(	popcountl	,
		unsigned	long
	)

popcount_func	(	popcountll	,
		unsigned long	long
	)

popcount_func	(	popcount32	,
		uint32_t
	)

popcount_func	(	popcount64	,
		uint64_t
	)