newlib-cygwin/newlib/libc/string/wcpncpy.c

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/*
FUNCTION
<<wcpncpy>>---copy part of a wide-character string returning a pointer to its end
ANSI_SYNOPSIS
#include <wchar.h>
2013-11-26 Julio Gutierrez <jgutleyva@gmail.com> *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.
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wchar_t *wcpncpy(wchar_t *__restrict <[s1]>,
const wchar_t *__restrict <[s2]>, size_t <[n]>);
TRAD_SYNOPSIS
wchar_t *wcpncpy(<[s1]>, <[s2]>, <[n]>
2013-11-26 Julio Gutierrez <jgutleyva@gmail.com> *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.
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wchar_t *__restrict <[s1]>;
const wchar_t *__restrict <[s2]>;
size_t <[n]>;
DESCRIPTION
The <<wcpncpy>> function copies not more than n wide-character codes
(wide-character codes that follow a null wide-character code are not
copied) from the array pointed to by <[s2]> to the array pointed to
by <[s1]>. If copying takes place between objects that overlap, the
behaviour is undefined.
If the array pointed to by <[s2]> is a wide-character string that is
shorter than <[n]> wide-character codes, null wide-character codes are
appended to the copy in the array pointed to by <[s1]>, until <[n]>
wide-character codes in all are written.
RETURNS
The <<wcpncpy>> function returns <[s1]>; no return value is reserved to
indicate an error.
PORTABILITY
<<wcpncpy>> is ISO/IEC 9899/AMD1:1995 (ISO C).
No supporting OS subroutines are required.
*/
#include <_ansi.h>
#include <wchar.h>
wchar_t *
_DEFUN (wcpncpy, (dst, src, count),
2013-11-26 Julio Gutierrez <jgutleyva@gmail.com> *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.
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wchar_t *__restrict dst _AND
_CONST wchar_t *__restrict src _AND
size_t count)
{
wchar_t *ret = NULL;
while (count > 0)
{
--count;
if ((*dst++ = *src++) == L'\0')
{
ret = dst - 1;
break;
}
}
while (count-- > 0)
*dst++ = L'\0';
return ret ? ret : dst;
}