1WMEMCMP(3P) POSIX Programmer's Manual WMEMCMP(3P)
2
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.
10
13 wmemcmp — compare wide characters in memory
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16 #include <wchar.h>
17 int wmemcmp(const wchar_t *ws1, const wchar_t *ws2, size_t n);
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21 The functionality described on this reference page is aligned with the
22 ISO C standard. Any conflict between the requirements described here
23 and the ISO C standard is unintentional. This volume of POSIX.1‐2008
24 defers to the ISO C standard.
25 The wmemcmp() function shall compare the first n wide characters of the
27 object pointed to by ws1 to the first n wide characters of the object
28 pointed to by ws2. This function shall not be affected by locale and
29 all wchar_t values shall be treated identically. The null wide charac‐
30 ter and wchar_t values not corresponding to valid characters shall not
31 be treated specially.
32 If n is zero, the application shall ensure that ws1 and ws2 are valid
34 pointers, and the function shall behave as if the two objects compare
35 equal.
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38 The wmemcmp() function shall return an integer greater than, equal to,
39 or less than zero, respectively, as the object pointed to by ws1 is
40 greater than, equal to, or less than the object pointed to by ws2.
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43 No errors are defined.
44 The following sections are informative.
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48 None.
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51 None.
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54 None.
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57 None.
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60 wmemchr(), wmemcpy(), wmemmove(), wmemset()
61 The Base Definitions volume of POSIX.1‐2008, <wchar.h>
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65 Portions of this text are reprinted and reproduced in electronic form
66 from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
67 -- Portable Operating System Interface (POSIX), The Open Group Base
68 Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
69 cal and Electronics Engineers, Inc and The Open Group. (This is
70 POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
71 event of any discrepancy between this version and the original IEEE and
72 The Open Group Standard, the original IEEE and The Open Group Standard
73 is the referee document. The original Standard can be obtained online
74 at http://www.unix.org/online.html .
75 Any typographical or formatting errors that appear in this page are
77 most likely to have been introduced during the conversion of the source
78 files to man page format. To report such errors, see https://www.ker‐
79 nel.org/doc/man-pages/reporting_bugs.html .
80IEEE/The Open Group 2013 WMEMCMP(3P)