char *
asniprintf (char *buf,
size_t *lenp,
const char *fmt, ...)
{
int ret;
va_list ap;
FILE f;
size_t len = *lenp;
struct _reent *ptr = _REENT;
if (buf && len)
{
/* mark an existing buffer, but allow allocation of larger string */
f._flags = __SWR | __SSTR | __SOPT;
}
else
{
/* mark a zero-length reallocatable buffer */
f._flags = __SWR | __SSTR | __SMBF;
len = 0;
buf = NULL;
}
f._bf._base = f._p = (unsigned char *) buf;
/* For now, inherit the 32-bit signed limit of FILE._bf._size.
FIXME - it would be nice to rewrite sys/reent.h to support size_t
for _size. */
if (len > INT_MAX)
{
__errno_r(ptr) = EOVERFLOW;
return NULL;
}
f._bf._size = f._w = len;
f._file = -1; /* No file. */
va_start (ap, fmt);
ret = _svfiprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret < 0)
return NULL;
*lenp = ret;
*f._p = '\0';
return (char *) f._bf._base;
}
int _svfprintf_r( struct _reent *r, FILE *stream, const char *format, va_list ap )
{
return _svfiprintf_r( r, stream, format, ap );
}
_DEFUN(_asiprintf_r, (ptr, strp, fmt),
struct _reent *ptr _AND
char **strp _AND
const char *fmt _DOTS)
{
int ret;
va_list ap;
FILE f;
/* mark a zero-length reallocatable buffer */
f._flags = __SWR | __SSTR | __SMBF;
f._bf._base = f._p = NULL;
f._bf._size = f._w = 0;
f._file = -1; /* No file. */
va_start (ap, fmt);
ret = _svfiprintf_r (ptr, &f, fmt, ap);
va_end (ap);
if (ret >= 0)
{
*f._p = 0;
*strp = f._bf._base;
}
return (ret);
}
#ifndef _REENT_ONLY
int
_DEFUN(asiprintf, (strp, fmt),
char **strp _AND
const char *fmt _DOTS)
