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/* Copyright (C) 2004 Manuel Novoa III <mjn3@codepoet.org>
*
* GNU Library General Public License (LGPL) version 2 or later.
*
* Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details.
*/
#include "_stdio.h"
#include <wchar.h>
#ifndef __UCLIBC_HAS_WCHAR__
#error wide function when no wide support!
#endif
#ifdef __UCLIBC_MJN3_ONLY__
#warning TODO: Fix prototype.
#endif
extern size_t __wcsnrtombs(char *__restrict dst,
const wchar_t **__restrict src,
size_t NWC, size_t len, mbstate_t *__restrict ps);
size_t _wstdio_fwrite(const wchar_t *__restrict ws, size_t n,
register FILE *__restrict stream)
{
size_t r, count;
char buf[64];
const wchar_t *pw;
__STDIO_STREAM_VALIDATE(stream);
#ifdef __STDIO_BUFFERS
if (__STDIO_STREAM_IS_FAKE_VSWPRINTF(stream)) {
/* We know buffer is wchar aligned for fake streams. */
count = (((wchar_t *)(stream->__bufend))
- ((wchar_t *)(stream->__bufpos)));
if (count > n) {
count = n;
}
if (count) {
wmemcpy((wchar_t *)(stream->__bufpos), ws, count);
stream->__bufpos = (char *)(((wchar_t *)(stream->__bufpos)) + count);
}
__STDIO_STREAM_VALIDATE(stream);
return n;
}
#endif
count = 0;
if (__STDIO_STREAM_IS_WIDE_WRITING(stream)
|| !__STDIO_STREAM_TRANS_TO_WRITE(stream, __FLAG_WIDE)
) {
pw = ws;
while (n > count) {
r = __wcsnrtombs(buf, &pw, n-count, sizeof(buf), &stream->__state);
if (r != ((size_t) -1)) { /* No encoding errors */
if (!r) {
++r; /* 0 is returned when nul is reached. */
pw = ws + count + r; /* pw was set to NULL, so correct. */
}
if (__stdio_fwrite(buf, r, stream) == r) {
count = pw - ws;
continue;
}
}
break;
}
/* Note: The count is incorrect if 0 < __stdio_fwrite return < r!!! */
}
__STDIO_STREAM_VALIDATE(stream);
return count;
}
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