NAME

       strxfrm - string transformation

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <string.h>

       size_t strxfrm(size_t size;
                      char dest[restrict size], const char src[restrict size],
                      size_t size);

DESCRIPTION

       The  strxfrm()  function  transforms  the src string into a form such that the result of strcmp(3) on two
       strings that have been transformed with strxfrm() is the same as the result  of  strcoll(3)  on  the  two
       strings  before their transformation.  The first size bytes of the transformed string are placed in dest.
       The transformation is based on the program's current locale for category LC_COLLATE.  (See setlocale(3)).

RETURN VALUE

       The strxfrm() function returns the number of bytes required to  store  the  transformed  string  in  dest
       excluding  the terminating null byte ('\0').  If the value returned is size or more, the contents of dest
       are indeterminate.

ATTRIBUTES

       For an explanation of the terms used in this section, see attributes(7).
       ┌──────────────────────────────────────────────────────────────────────┬───────────────┬────────────────┐
       │ Interface                                                            │ Attribute     │ Value          │
       ├──────────────────────────────────────────────────────────────────────┼───────────────┼────────────────┤
       │ strxfrm()                                                            │ Thread safety │ MT-Safe locale │
       └──────────────────────────────────────────────────────────────────────┴───────────────┴────────────────┘

STANDARDS

       C11, POSIX.1-2008.

HISTORY

       POSIX.1-2001, C89, SVr4, 4.3BSD.

SEE ALSO

       memcmp(3), setlocale(3), strcasecmp(3), strcmp(3), strcoll(3), string(3)

Linux man-pages 6.16                               2025-09-07                                         strxfrm(3)