fmemcmp (3) - Linux Manuals

fmemcmp: fuzzy comparison of two memory areas

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

fstrcmp version 0.7
Copyright (C) 2009 Peter Miller
Peter Miller <pmiller [at] opensource.org.au>

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.

Copyright (C) 1988-2009 Free Software Foundation