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380c9f6165
*libc/include/wchar.h: Add restrict keyword. *libc/stdio/fgetws.c (fgetws): ditto. *libc/stdio/fputws.c (fputws): ditto. *libc/stdio/fwprintf.c (fwprintf): ditto. *libc/stdio/fwscanf.c (fwscanf): ditto. *libc/stdio/swprintf.c (swprintf): ditto. *libc/stdio/swscanf.c (swscanf): ditto. *libc/stdio/vfwprintf.c (vfwprintf): ditto. *libc/stdio/vfwscanf.c (vfwscanf): ditto. *libc/stdio/vswprintf.c (vswprintf): ditto. *libc/stdio/vswscanf.c (vswscanf): ditto. *libc/stdio/vwprintf.c (vwprintf): ditto. *libc/stdio/vwscanf.c (vwscanf): ditto. *libc/stdio/wprintf.c (wprintf): ditto. *libc/stdio/wscanf.c (wscanf): ditto. *libc/stdlib/mbrlen.c (mbrlen): ditto. *libc/stdlib/mbrtowc.c (mbrtowc): ditto. *libc/stdlib/mbsnrtowcs.c (mbsnrtowcs): ditto. *libc/stdlib/mbsrtowcs.c (mbsrtowcs): ditto. *libc/stdlib/wcrtomb.c (wcrtomb): ditto. *libc/stdlib/wcsnrtombs.c (wcsnrtombs): ditto. *libc/stdlib/wcsrtombs.c (wcsrtombs): ditto. *libc/stdlib/wcstod.c (wcstod): ditto. *libc/stdlib/wcstol.c (wcstol): ditto. *libc/stdlib/wcstold.c (wcstold): ditto. *libc/stdlib/wcstoll.c (wcstoll): ditto. *libc/stdlib/wcstoul.c (wcstoul): ditto. *libc/stdlib/wcstoull.c (cstoull): ditto. *libc/string/wcpcpy.c (wcpcpy): ditto. *libc/string/wcpncpy.c (wcpncpy): ditto. *libc/string/wcscat.c (wcscat): ditto. *libc/string/wcscpy.c (wcscpy): ditto. *libc/string/wcsncat.c (wcsncat): ditto. *libc/string/wcsncpy.c (wcsncpy): ditto. *libc/string/wcsstr.c (wcsstr): ditto. *libc/string/wcstok.c (wcstok): ditto. *libc/string/wcsxfrm.c (wcsxfrm): ditto. *libc/string/wmemcpy.c (wmemcpy): ditto.
60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
/*
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FUNCTION
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<<wcsncpy>>---copy part of a wide-character string
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ANSI_SYNOPSIS
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#include <wchar.h>
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wchar_t *wcsncpy(wchar_t *__restrict <[s1]>,
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const wchar_t *__restrict <[s2]>, size_t <[n]>);
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TRAD_SYNOPSIS
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wchar_t *wcsncpy(<[s1]>, <[s2]>, <[n]>
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wchar_t *__restrict <[s1]>;
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const wchar_t *__restrict <[s2]>;
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size_t <[n]>;
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DESCRIPTION
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The <<wcsncpy>> function copies not more than <[n]> wide-character codes
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(wide-character codes that follow a null wide-character code are not
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copied) from the array pointed to by <[s2]> to the array pointed to
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by <[s1]>. If copying takes place between objects that overlap, the
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behaviour is undefined. Note that if <[s1]> contains more than <[n]>
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wide characters before its terminating null, the result is not
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null-terminated.
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If the array pointed to by <[s2]> is a wide-character string that is
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shorter than <[n]> wide-character codes, null wide-character codes are
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appended to the copy in the array pointed to by <[s1]>, until <[n]>
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wide-character codes in all are written.
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RETURNS
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The <<wcsncpy>> function returns <[s1]>; no return value is reserved to
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indicate an error.
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PORTABILITY
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ISO/IEC 9899; POSIX.1.
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No supporting OS subroutines are required.
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*/
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#include <_ansi.h>
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#include <wchar.h>
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wchar_t *
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_DEFUN (wcsncpy, (s1, s2, n),
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wchar_t *__restrict s1 _AND
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_CONST wchar_t *__restrict s2 _AND
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size_t n)
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{
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wchar_t *dscan=s1;
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while(n > 0)
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{
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--n;
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if((*dscan++ = *s2++) == L'\0') break;
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}
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while(n-- > 0) *dscan++ = L'\0';
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return s1;
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}
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