Man page - fmemcmp(3)

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Manual

fmemcmp

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
SEE ALSO
COPYRIGHT

NAME

fmemcmp - fuzzy comparison of two memory areas

SYNOPSIS

#include <fstrcmp.h>
#define FSTRCMP_IDENTICAL
#define FSTRCMP_THRESHOLD
#define FSTRCMP_ERROR
double fmemcmp(const void *data1, size_t size1, const void *data2, size_t size2);

DESCRIPTION

The fmemcmp () function compares the two memory areas, the size1 bytes pointed to by data1 and the size2 bytes pointed to by data2 .

RETURN VALUE

The fmemcmp function returns a floating point value between 0.0 and FSTRCMP_IDENTICAL. A value of 0.0 means the memory areas are utterly un-alike. A value of FSTRCMP_IDENTICAL means the memory areas are identical. A value of more than FSTRCMP_THRESHOLD (it lies between 0.0 and FSTRCMP_IDENTICAL) would be considered "similar" by most people.

A value of FSTRCMP_ERROR (always negative) indicates a malloc (3) failure.

COPYRIGHT

The comparison code is derived from the fuzzy comparison functions in GNU Gettext 0.17. The GNU Gettext comparison functions were, in turn, derived from GNU Diff 2.7.