#include "stdio_impl.h"
+#include <limits.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <wchar.h>
struct cookie {
wchar_t *ws;
size_t l0 = l;
int i = 0;
struct cookie *c = f->cookie;
- while (c->l && l && (i=mbtowc(c->ws, s, l))>=0) {
+ if (s!=f->wbase && sw_write(f, f->wbase, f->wpos-f->wbase)==-1)
+ return -1;
+ while (c->l && l && (i=mbtowc(c->ws, (void *)s, l))>=0) {
+ if (!i) i=1;
s+=i;
l-=i;
c->l--;
c->ws++;
}
*c->ws = 0;
- return i<0 ? i : l0;
+ if (i < 0) {
+ f->wpos = f->wbase = f->wend = 0;
+ f->flags |= F_ERR;
+ return i;
+ }
+ f->wend = f->buf + f->buf_size;
+ f->wpos = f->wbase = f->buf;
+ return l0;
}
-int vswprintf(wchar_t *s, size_t n, const wchar_t *fmt, va_list ap)
+int vswprintf(wchar_t *restrict s, size_t n, const wchar_t *restrict fmt, va_list ap)
{
int r;
- FILE f;
unsigned char buf[256];
struct cookie c = { s, n-1 };
+ FILE f = {
+ .lbf = EOF,
+ .write = sw_write,
+ .lock = -1,
+ .buf = buf,
+ .buf_size = sizeof buf,
+ .cookie = &c,
+ };
- memset(&f, 0, sizeof(FILE));
- f.lbf = EOF;
- f.write = sw_write;
- f.buf_size = sizeof buf;
- f.buf = buf;
- f.owner = -1;
- f.cookie = &c;
if (!n) {
return -1;
} else if (n > INT_MAX) {
return -1;
}
r = vfwprintf(&f, fmt, ap);
- __oflow(&f);
+ sw_write(&f, 0, 0);
return r>=n ? -1 : r;
}