PARROT_WARN_UNUSED_RESULT
INTVAL
encoding_is_cclass(PARROT_INTERP, INTVAL flags, ARGIN(const STRING *src), UINTVAL offset)
{
ASSERT_ARGS(encoding_is_cclass)
UINTVAL codepoint;
if (offset >= src->strlen)
return 0;
codepoint = STRING_ord(interp, src, offset);
if (codepoint >= 256)
return u_iscclass(interp, codepoint, flags) != 0;
return (Parrot_iso_8859_1_typetable[codepoint] & flags) ? 1 : 0;
}
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
INTVAL
Parrot_io_parse_open_flags(PARROT_INTERP, ARGIN(const STRING *mode_str))
{
ASSERT_ARGS(Parrot_io_parse_open_flags)
INTVAL i, mode_len;
INTVAL flags = 0;
if (STRING_IS_NULL(mode_str))
return PIO_F_READ;
mode_len = Parrot_str_byte_length(interp, mode_str);
for (i = 0; i < mode_len; ++i) {
const INTVAL s = STRING_ord(interp, mode_str, i);
switch (s) {
case 'r':
flags |= PIO_F_READ;
break;
case 'w':
flags |= PIO_F_WRITE;
if (!(flags & PIO_F_APPEND)) /* don't truncate if appending */
flags |= PIO_F_TRUNC;
break;
case 'a':
flags |= PIO_F_APPEND;
flags |= PIO_F_WRITE;
if ((flags & PIO_F_TRUNC)) /* don't truncate if appending */
flags &= ~PIO_F_TRUNC;
break;
case 'p':
flags |= PIO_F_PIPE;
break;
case 'b':
flags |= PIO_F_BINARY;
break;
default:
break;
}
}
return flags;
}
PARROT_EXPORT
PARROT_CANNOT_RETURN_NULL
PARROT_WARN_UNUSED_RESULT
PMC*
Parrot_make_cb(PARROT_INTERP, ARGMOD(PMC* sub), ARGIN(PMC* user_data),
ARGIN(STRING *cb_signature))
{
ASSERT_ARGS(Parrot_make_cb)
PMC *cb, *cb_sig;
int type = 0;
STRING *sc;
/*
* we stuff all the information into the user_data PMC and pass that
* on to the external sub
*/
PMC * const interp_pmc = VTABLE_get_pmc_keyed_int(interp, interp->iglobals,
(INTVAL) IGLOBALS_INTERPRETER);
if (default_interp == NULL)
default_interp = interp;
/* be sure __LINE__ is consistent */
sc = CONST_STRING(interp, "_interpreter");
Parrot_pmc_setprop(interp, user_data, sc, interp_pmc);
sc = CONST_STRING(interp, "_sub");
Parrot_pmc_setprop(interp, user_data, sc, sub);
/* only ASCII signatures are supported */
if (STRING_length(cb_signature) == 3) {
/* Callback return type ignored */
if (STRING_ord(interp, cb_signature, 1) == 'U') {
type = 'D';
}
else {
if (STRING_ord(interp, cb_signature, 2) == 'U') {
type = 'C';
}
}
}
if (type != 'C' && type != 'D')
Parrot_ex_throw_from_c_args(interp, NULL, 1,
"unhandled signature '%Ss' in make_cb", cb_signature);
cb_sig = Parrot_pmc_new(interp, enum_class_String);
VTABLE_set_string_native(interp, cb_sig, cb_signature);
sc = CONST_STRING(interp, "_signature");
Parrot_pmc_setprop(interp, user_data, sc, cb_sig);
/*
* We are going to be passing the user_data PMC to external code, but
* it may go out of scope until the callback is called -- we don't know
* for certain as we don't know when the callback will be called.
* Therefore, to prevent the PMC from being destroyed by a GC sweep,
* we need to anchor it.
*
*/
Parrot_pmc_gc_register(interp, user_data);
/*
* Finally, the external lib awaits a function pointer.
* Create a PMC that points to Parrot_callback_C (or _D);
* it can be passed on with signature 'p'.
*/
cb = Parrot_pmc_new(interp, enum_class_UnManagedStruct);
/*
* Currently, we handle only 2 types:
* _C ... user_data is 2nd parameter
* _D ... user_data is 1st parameter
*/
if (type == 'C')
VTABLE_set_pointer(interp, cb, F2DPTR(Parrot_callback_C));
else
VTABLE_set_pointer(interp, cb, F2DPTR(Parrot_callback_D));
Parrot_pmc_gc_register(interp, cb);
return cb;
}
PARROT_EXPORT
void
Parrot_run_callback(PARROT_INTERP,
ARGMOD(PMC* user_data), ARGIN(void* external_data))
{
ASSERT_ARGS(Parrot_run_callback)
PMC *signature;
PMC *sub;
STRING *sig_str;
INTVAL ch;
char pasm_sig[5];
INTVAL i_param;
PMC *p_param;
void *param = NULL; /* avoid -Ox warning */
STRING *sc;
sc = CONST_STRING(interp, "_sub");
sub = Parrot_pmc_getprop(interp, user_data, sc);
sc = CONST_STRING(interp, "_signature");
signature = Parrot_pmc_getprop(interp, user_data, sc);
sig_str = VTABLE_get_string(interp, signature);
pasm_sig[0] = 'P';
ch = STRING_ord(interp, sig_str, 1);
if (ch == 'U') /* user_data Z in pdd16 */
ch = STRING_ord(interp, sig_str, 2); /* ch is now type of external data */
switch (ch) {
case 'v':
pasm_sig[1] = 'v';
break;
case 'l':
/* FIXME: issue #742 */
i_param = (INTVAL)(long)(INTVAL) external_data;
goto case_I;
case 'i':
/* FIXME: issue #742 */
i_param = (INTVAL)(int)(INTVAL) external_data;
goto case_I;
case 's':
/* FIXME: issue #742 */
i_param = (INTVAL)(short)(INTVAL) external_data;
goto case_I;
case 'c':
/* FIXME: issue #742 */
i_param = (INTVAL)(char)(INTVAL) external_data;
case_I:
pasm_sig[1] = 'I';
param = (void*) i_param;
break;
case 'p':
/* created a UnManagedStruct */
p_param = Parrot_pmc_new(interp, enum_class_UnManagedStruct);
VTABLE_set_pointer(interp, p_param, external_data);
pasm_sig[1] = 'P';
param = (void*) p_param;
break;
case 't':
pasm_sig[1] = 'S';
param = Parrot_str_new(interp, (const char*)external_data, 0);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL, 1,
"unhandled signature char '%c' in run_cb", ch);
}
pasm_sig[2] = '-';
pasm_sig[3] = '>'; /* no return value supported yet */
pasm_sig[4] = '\0';
Parrot_ext_call(interp, sub, pasm_sig, user_data, param);
}
