1WMEMCMP(3P)                POSIX Programmer's Manual               WMEMCMP(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

12       wmemcmp — compare wide characters in memory
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SYNOPSIS

15       #include <wchar.h>
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17       int wmemcmp(const wchar_t *ws1, const wchar_t *ws2, size_t n);
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DESCRIPTION

20       The functionality described on this reference page is aligned with  the
21       ISO C  standard.  Any  conflict between the requirements described here
22       and the ISO C standard is unintentional. This  volume  of  POSIX.1‐2017
23       defers to the ISO C standard.
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25       The wmemcmp() function shall compare the first n wide characters of the
26       object pointed to by ws1 to the first n wide characters of  the  object
27       pointed  to  by ws2.  This function shall not be affected by locale and
28       all wchar_t values shall be treated identically. The null wide  charac‐
29       ter  and wchar_t values not corresponding to valid characters shall not
30       be treated specially.
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32       If n is zero, the application shall ensure that ws1 and ws2  are  valid
33       pointers,  and  the function shall behave as if the two objects compare
34       equal.
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RETURN VALUE

37       The wmemcmp() function shall return an integer greater than, equal  to,
38       or  less  than  zero,  respectively, as the object pointed to by ws1 is
39       greater than, equal to, or less than the object pointed to by ws2.
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ERRORS

42       No errors are defined.
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44       The following sections are informative.
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EXAMPLES

47       None.
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APPLICATION USAGE

50       None.
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RATIONALE

53       None.
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FUTURE DIRECTIONS

56       None.
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SEE ALSO

59       wmemchr(), wmemcpy(), wmemmove(), wmemset()
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61       The Base Definitions volume of POSIX.1‐2017, <wchar.h>
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64       Portions of this text are reprinted and reproduced in  electronic  form
65       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
66       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
67       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
68       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
69       event of any discrepancy between this version and the original IEEE and
70       The Open Group Standard, the original IEEE and The Open Group  Standard
71       is  the  referee document. The original Standard can be obtained online
72       at http://www.opengroup.org/unix/online.html .
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74       Any typographical or formatting errors that appear  in  this  page  are
75       most likely to have been introduced during the conversion of the source
76       files to man page format. To report such errors,  see  https://www.ker‐
77       nel.org/doc/man-pages/reporting_bugs.html .
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81IEEE/The Open Group                  2017                          WMEMCMP(3P)
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