PyObject_HEAD
buf b;
PyObject *sub;
+ unsigned lk;
} buf_pyobj;
static PyTypeObject *rbuf_pytype, *wbuf_pytype;
#define WBUF_PYCHECK(o) PyObject_TypeCheck((o), wbuf_pytype)
#define BUF_B(o) (&((buf_pyobj *)(o))->b)
#define BUF_SUB(o) (((buf_pyobj *)(o))->sub)
+#define BUF_LK(o) (((buf_pyobj *)(o))->lk)
/*----- Exceptions --------------------------------------------------------*/
q = xmalloc(in.sz);
memcpy(q, in.p, in.sz);
me = (buf_pyobj *)ty->tp_alloc(ty, 0);
- me->sub = 0;
+ me->sub = 0; me->lk = 0;
buf_init(&me->b, q, in.sz);
end:
return ((PyObject *)me);
static void buf_pydealloc(PyObject *me)
{
- if (BUF_SUB(me))
- Py_DECREF(BUF_SUB(me));
- else
- xfree(BBASE(BUF_B(me)));
+ assert(!BUF_LK(me));
+ if (BUF_SUB(me)) Py_DECREF(BUF_SUB(me));
+ else xfree(BBASE(BUF_B(me)));
FREEOBJ(me);
}
b = PyObject_NEW(buf_pyobj, rbuf_pytype); \
b->b = bb; \
b->sub = me; \
+ b->lk = 0; \
Py_INCREF(me); \
return ((PyObject *)b); \
end: \
/*----- Write buffers -----------------------------------------------------*/
-static void ensure(PyObject *me, size_t n)
+static int ensure(PyObject *me, size_t n)
{
buf *b = BUF_B(me);
+ size_t nn = BSZ(b);
+ octet *p;
+ size_t want = BLEN(b) + n;
- if (BLEFT(b) < n) {
- size_t nn = BSZ(b);
- octet *p;
- size_t want = BLEN(b) + n;
+ if (BLEFT(b) >= n)
+ return (0);
+ else if (BUF_LK(me))
+ BUFERR("buffer locked");
+ else {
while (nn < want) nn <<= 1;
p = xrealloc(BBASE(b), nn, BSZ(b));
BCUR(b) = p + BLEN(b);
BLIM(b) = p + nn;
BBASE(b) = p;
+ return (0);
}
+end:
+ return (-1);
}
static PyObject *wbuf_pynew(PyTypeObject *ty, PyObject *arg, PyObject *kw)
goto end;
me = (buf_pyobj *)ty->tp_alloc(ty, 0);
p = xmalloc(n);
- me->sub = 0;
+ me->sub = 0; me->lk = 0;
buf_init(&me->b, p, n);
end:
return ((PyObject *)me);
void *p;
size_t n;
if (!PyArg_ParseTuple(arg, "O&:zero", convszt, &n)) return (0);
- ensure(me, n);
+ if (ensure(me, n)) return (0);
p = buf_get(BUF_B(me), n); assert(p && BOK(BUF_B(me)));
memset(p, 0, n);
RETURN_ME;
{
struct bin in;
if (!PyArg_ParseTuple(arg, "O&:put", convbin, &in)) return (0);
- ensure(me, in.sz);
+ if (ensure(me, in.sz)) return (0);
buf_put(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me)));
RETURN_ME;
}
{ \
uint##n i; \
if (!PyArg_ParseTuple(arg, "O&:putu" #w, convu##n, &i)) return (0); \
- ensure(me, SZ_##n); \
+ if (ensure(me, SZ_##n)) return (0); \
buf_putu##w(BUF_B(me), i); assert(BOK(BUF_B(me))); \
RETURN_ME; \
}
struct bin in; \
if (!PyArg_ParseTuple(arg, "O&:putblk" #w, convbin, &in)) goto end; \
if (MASK##W && in.sz > MASK##W) VALERR("too large"); \
- ensure(me, in.sz + SZ_##n); \
+ if (ensure(me, in.sz + SZ_##n)) return (0); \
buf_putmem##w(BUF_B(me), in.p, in.sz); assert(BOK(BUF_B(me))); \
RETURN_ME; \
end: \
{
mp *x = 0;
if (!PyArg_ParseTuple(arg, "O&:putmp", convmp, &x)) return (0);
- ensure(me, mp_octets(x) + 2);
+ if (ensure(me, mp_octets(x) + 2)) return (0);
buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
RETURN_ME;
}
{
mp *x = 0;
if (!PyArg_ParseTuple(arg, "O&:putgf", convgf, &x)) return (0);
- ensure(me, mp_octets(x) + 2);
+ if (ensure(me, mp_octets(x) + 2)) return (0);
buf_putmp(BUF_B(me), x); assert(BOK(BUF_B(me)));
MP_DROP(x);
RETURN_ME;
{
ec pt = EC_INIT;
if (!PyArg_ParseTuple(arg, "O&:putecpt", convecpt, &pt)) return (0);
- ensure(me, EC_ATINF(&pt) ? 2 : 6 + mp_octets(pt.x) + mp_octets(pt.y));
+ if (ensure(me, EC_ATINF(&pt) ? 2 : 6 + mp_octets(pt.x) + mp_octets(pt.y)))
+ return (0);
buf_putec(BUF_B(me), &pt); assert(BOK(BUF_B(me)));
EC_DESTROY(&pt);
RETURN_ME;
if (!PyArg_ParseTuple(arg, "O!:putecptraw", ecptcurve_pytype, &ptobj))
return (0);
EC_OUT(ECPT_C(ptobj), &pt, ECPT_P(ptobj));
- ensure(me, ECPT_C(ptobj)->f->noctets * 2 + 1);
+ if (ensure(me, ECPT_C(ptobj)->f->noctets * 2 + 1)) return (0);
ec_putraw(ECPT_C(ptobj), BUF_B(me), &pt); assert(BOK(BUF_B(me)));
EC_DESTROY(&pt);
RETURN_ME;
{
PyObject *geobj;
if (!PyArg_ParseTuple(arg, "O!:putge", ge_pytype, &geobj)) return (0);
- ensure(me, GE_G(geobj)->noctets);
+ if (ensure(me, GE_G(geobj)->noctets)) return (0);
G_TOBUF(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
RETURN_ME;
}
{
PyObject *geobj;
if (!PyArg_ParseTuple(arg, "O!:putgeraw", ge_pytype, &geobj)) return (0);
- ensure(me, GE_G(geobj)->noctets);
+ if (ensure(me, GE_G(geobj)->noctets)) return (0);
G_TORAW(GE_G(geobj), BUF_B(me), GE_X(geobj)); assert(BOK(BUF_B(me)));
RETURN_ME;
}