newlib-cygwin/newlib/libc/stdlib/mbstowcs_r.c

38 lines
644 B
C

#include <stdlib.h>
#include <wchar.h>
#include "local.h"
size_t
_mbstowcs_r (struct _reent *r,
wchar_t *__restrict pwcs,
const char *__restrict s,
size_t n,
mbstate_t *state)
{
size_t ret = 0;
char *t = (char *)s;
int bytes;
if (!pwcs)
n = (size_t) 1; /* Value doesn't matter as long as it's not 0. */
while (n > 0)
{
bytes = __MBTOWC (r, pwcs, t, MB_CUR_MAX, state);
if (bytes < 0)
{
state->__count = 0;
return -1;
}
else if (bytes == 0)
break;
t += bytes;
++ret;
if (pwcs)
{
++pwcs;
--n;
}
}
return ret;
}