From 0b44a0315b47dd8eced9f3b7f31580cf14bbfc01 Mon Sep 17 00:00:00 2001 From: Rich Felker Date: Sat, 12 Feb 2011 00:22:29 -0500 Subject: initial check-in, version 0.5.0 --- src/multibyte/wcsnrtombs.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 src/multibyte/wcsnrtombs.c (limited to 'src/multibyte/wcsnrtombs.c') diff --git a/src/multibyte/wcsnrtombs.c b/src/multibyte/wcsnrtombs.c new file mode 100644 index 00000000..666f6f3f --- /dev/null +++ b/src/multibyte/wcsnrtombs.c @@ -0,0 +1,51 @@ +/* + * This code was written by Rich Felker in 2010; no copyright is claimed. + * This code is in the public domain. Attribution is appreciated but + * unnecessary. + */ + +#include +#include +#include +#include + +#include "internal.h" + +size_t wcsnrtombs(char *dst, const wchar_t **wcs, size_t wn, size_t n, mbstate_t *st) +{ + size_t l, cnt=0, n2; + char *s, buf[256]; + const wchar_t *ws = *wcs; + + if (!dst) s = buf, n = sizeof buf; + else s = dst; + + while ( n && ( (n2=wn)>=n || n2>32 ) ) { + if (n2>=n) n2=n; + wn -= n2; + l = wcsrtombs(s, &ws, n2, 0); + if (!(l+1)) { + cnt = l; + n = 0; + break; + } + if (s != buf) { + s += l; + n -= l; + } + cnt += l; + } + while (n && wn) { + l = wcrtomb(s, *ws, 0); + if (!(l+1)) { + cnt = l; + break; + } + ws++; wn--; + /* safe - this loop runs fewer than sizeof(buf) times */ + s+=l; n-=l; + cnt++; + } + if (dst) *wcs = ws; + return cnt; +} -- cgit 1.4.1