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pcc.c
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pcc.c
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/*
Copyright (C) 2001-2008, Parrot Foundation.
$Id$
=head1 Parrot Calling Conventions
=head1 Description
Functions in this file handle argument/return value passing to and from
subroutines.
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/oplib/ops.h"
#include "pcc.str"
#include "../pmc/pmc_key.h"
#include "../pmc/pmc_continuation.h"
/* HEADERIZER HFILE: include/parrot/call.h */
/* HEADERIZER BEGIN: static */
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
static void check_for_opt_flag(PARROT_INTERP,
ARGMOD(call_state *st),
int has_arg)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void check_named(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void clone_key_arg(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void commit_last_arg(PARROT_INTERP,
int index,
int cur,
ARGMOD(opcode_t *n_regs_used),
int seen_arrow,
ARGIN(PMC * const *sigs),
ARGMOD(opcode_t **indexes),
ARGMOD(Parrot_Context *ctx),
ARGIN_NULLOK(PMC *pmc),
ARGIN(va_list *list))
__attribute__nonnull__(1)
__attribute__nonnull__(4)
__attribute__nonnull__(6)
__attribute__nonnull__(7)
__attribute__nonnull__(8)
__attribute__nonnull__(10)
FUNC_MODIFIES(*n_regs_used)
FUNC_MODIFIES(*indexes)
FUNC_MODIFIES(*ctx);
static void commit_last_arg_sig_object(PARROT_INTERP,
int index,
int cur,
ARGMOD(opcode_t *n_regs_used),
int seen_arrow,
ARGIN(PMC * const *sigs),
ARGMOD(opcode_t **indexes),
ARGMOD(Parrot_Context *ctx),
ARGIN(PMC *sig_obj))
__attribute__nonnull__(1)
__attribute__nonnull__(4)
__attribute__nonnull__(6)
__attribute__nonnull__(7)
__attribute__nonnull__(8)
__attribute__nonnull__(9)
FUNC_MODIFIES(*n_regs_used)
FUNC_MODIFIES(*indexes)
FUNC_MODIFIES(*ctx);
static void convert_arg_from_int(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void convert_arg_from_num(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void convert_arg_from_pmc(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void convert_arg_from_str(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
PARROT_CANNOT_RETURN_NULL
static Parrot_Context * count_signature_elements(PARROT_INTERP,
ARGIN(const char *signature),
ARGMOD(PMC *args_sig),
ARGMOD(PMC *results_sig),
int flag)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*args_sig)
FUNC_MODIFIES(*results_sig);
static void dissect_aggregate_arg(PARROT_INTERP,
ARGMOD(PMC *call_object),
ARGIN(PMC *aggregate))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*call_object);
static void extract_named_arg_from_op(PARROT_INTERP,
ARGMOD(PMC *call_object),
ARGIN(STRING *name),
ARGIN(PMC * const raw_sig),
ARGIN(opcode_t * const raw_args),
INTVAL arg_index)
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
__attribute__nonnull__(5)
FUNC_MODIFIES(*call_object);
static int fetch_arg_op(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static int fetch_arg_sig(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void init_call_stats(ARGMOD(call_state *st))
__attribute__nonnull__(1)
FUNC_MODIFIES(*st);
static void init_first_dest_named(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static int locate_named_named(PARROT_INTERP, ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
static void next_arg_sig(PARROT_INTERP, ARGMOD(call_state_item *sti))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
FUNC_MODIFIES(*sti);
static void null_val(int sig, ARGMOD(call_state *st))
__attribute__nonnull__(2)
FUNC_MODIFIES(*st);
PARROT_CAN_RETURN_NULL
static void parse_signature_string(PARROT_INTERP,
ARGIN(const char *signature),
ARGMOD(PMC **arg_flags),
ARGMOD(PMC **return_flags))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*arg_flags)
FUNC_MODIFIES(*return_flags);
PARROT_CAN_RETURN_NULL
static const char * set_context_sig_params(PARROT_INTERP,
ARGIN(const char *signature),
ARGMOD(INTVAL *n_regs_used),
ARGMOD(PMC **sigs),
ARGMOD(opcode_t **indexes),
ARGMOD(Parrot_Context *ctx),
ARGMOD(PMC *sig_obj))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
__attribute__nonnull__(5)
__attribute__nonnull__(6)
__attribute__nonnull__(7)
FUNC_MODIFIES(*n_regs_used)
FUNC_MODIFIES(*sigs)
FUNC_MODIFIES(*indexes)
FUNC_MODIFIES(*ctx)
FUNC_MODIFIES(*sig_obj);
static void set_context_sig_returns(PARROT_INTERP,
ARGMOD(Parrot_Context *ctx),
ARGMOD(opcode_t **indexes),
ARGIN_NULLOK(const char *ret_x),
ARGMOD(PMC *result_list))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(5)
FUNC_MODIFIES(*ctx)
FUNC_MODIFIES(*indexes)
FUNC_MODIFIES(*result_list);
static void set_context_sig_returns_varargs(PARROT_INTERP,
ARGMOD(Parrot_Context *ctx),
ARGMOD(opcode_t **indexes),
ARGIN(const char *ret_x),
ARGMOD(va_list returns))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
__attribute__nonnull__(5)
FUNC_MODIFIES(*ctx)
FUNC_MODIFIES(*indexes)
FUNC_MODIFIES(returns);
static int set_retval_util(PARROT_INTERP,
ARGIN(const char *sig),
ARGIN(Parrot_Context *ctx),
ARGMOD(call_state *st))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
__attribute__nonnull__(4)
FUNC_MODIFIES(*st);
static void start_flatten(PARROT_INTERP,
ARGMOD(call_state *st),
ARGIN(PMC *p_arg))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3)
FUNC_MODIFIES(*st);
static void store_arg(ARGIN(const call_state *st), INTVAL idx)
__attribute__nonnull__(1);
static void too_few(PARROT_INTERP,
ARGIN(const call_state *st),
ARGIN(const char *action))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
static void too_many(PARROT_INTERP,
ARGIN(const call_state *st),
ARGIN(const char *action))
__attribute__nonnull__(1)
__attribute__nonnull__(2)
__attribute__nonnull__(3);
#define ASSERT_ARGS_check_for_opt_flag __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_check_named __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_clone_key_arg __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_commit_last_arg __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(n_regs_used) \
|| PARROT_ASSERT_ARG(sigs) \
|| PARROT_ASSERT_ARG(indexes) \
|| PARROT_ASSERT_ARG(ctx) \
|| PARROT_ASSERT_ARG(list)
#define ASSERT_ARGS_commit_last_arg_sig_object __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(n_regs_used) \
|| PARROT_ASSERT_ARG(sigs) \
|| PARROT_ASSERT_ARG(indexes) \
|| PARROT_ASSERT_ARG(ctx) \
|| PARROT_ASSERT_ARG(sig_obj)
#define ASSERT_ARGS_convert_arg_from_int __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_convert_arg_from_num __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_convert_arg_from_pmc __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_convert_arg_from_str __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_count_signature_elements __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(signature) \
|| PARROT_ASSERT_ARG(args_sig) \
|| PARROT_ASSERT_ARG(results_sig)
#define ASSERT_ARGS_dissect_aggregate_arg __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(call_object) \
|| PARROT_ASSERT_ARG(aggregate)
#define ASSERT_ARGS_extract_named_arg_from_op __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(call_object) \
|| PARROT_ASSERT_ARG(name) \
|| PARROT_ASSERT_ARG(raw_sig) \
|| PARROT_ASSERT_ARG(raw_args)
#define ASSERT_ARGS_fetch_arg_op __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_fetch_arg_sig __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_init_call_stats __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_init_first_dest_named __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_locate_named_named __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_next_arg_sig __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(sti)
#define ASSERT_ARGS_null_val __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_parse_signature_string __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(signature) \
|| PARROT_ASSERT_ARG(arg_flags) \
|| PARROT_ASSERT_ARG(return_flags)
#define ASSERT_ARGS_set_context_sig_params __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(signature) \
|| PARROT_ASSERT_ARG(n_regs_used) \
|| PARROT_ASSERT_ARG(sigs) \
|| PARROT_ASSERT_ARG(indexes) \
|| PARROT_ASSERT_ARG(ctx) \
|| PARROT_ASSERT_ARG(sig_obj)
#define ASSERT_ARGS_set_context_sig_returns __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(ctx) \
|| PARROT_ASSERT_ARG(indexes) \
|| PARROT_ASSERT_ARG(result_list)
#define ASSERT_ARGS_set_context_sig_returns_varargs \
__attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(ctx) \
|| PARROT_ASSERT_ARG(indexes) \
|| PARROT_ASSERT_ARG(ret_x) \
|| PARROT_ASSERT_ARG(returns)
#define ASSERT_ARGS_set_retval_util __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(sig) \
|| PARROT_ASSERT_ARG(ctx) \
|| PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_start_flatten __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st) \
|| PARROT_ASSERT_ARG(p_arg)
#define ASSERT_ARGS_store_arg __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(st)
#define ASSERT_ARGS_too_few __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st) \
|| PARROT_ASSERT_ARG(action)
#define ASSERT_ARGS_too_many __attribute__unused__ int _ASSERT_ARGS_CHECK = \
PARROT_ASSERT_ARG(interp) \
|| PARROT_ASSERT_ARG(st) \
|| PARROT_ASSERT_ARG(action)
/* Don't modify between HEADERIZER BEGIN / HEADERIZER END. Your changes will be lost. */
/* HEADERIZER END: static */
/* Make sure we don't conflict with any other MAX() macros defined elsewhere */
#define PARROT_MAX(a, b) (((a)) > (b) ? (a) : (b))
#define SAVE_OFF_REGS(orig, next, save) \
(save).bp = (orig).bp;\
(save).bp_ps = (orig).bp_ps;\
(orig).bp = (next).bp;\
(orig).bp_ps = (next).bp_ps;
#define RESTORE_REGS(orig, save) \
(orig).bp = (save).bp;\
(orig).bp_ps = (save).bp_ps;
/*
=item C<PMC* Parrot_pcc_build_sig_object_from_op(PARROT_INTERP, PMC *signature,
PMC * const raw_sig, opcode_t * const raw_args)>
Take a raw signature and argument list from a set_args opcode and
convert it to a CallSignature PMC.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_sig_object_from_op(PARROT_INTERP, ARGIN_NULLOK(PMC *signature),
ARGIN(PMC * const raw_sig), ARGIN(opcode_t * const raw_args))
{
ASSERT_ARGS(Parrot_pcc_build_sig_object_from_op)
PMC *call_object;
INTVAL arg_index;
INTVAL arg_count = VTABLE_elements(interp, raw_sig);
Parrot_Context *ctx = CONTEXT(interp);
if (PMC_IS_NULL(signature))
call_object = pmc_new(interp, enum_class_CallSignature);
else
call_object = signature;
VTABLE_set_attr_str(interp, call_object, CONST_STRING(interp, "arg_flags"), raw_sig);
for (arg_index = 0; arg_index < arg_count; arg_index++) {
INTVAL arg_flags = VTABLE_get_integer_keyed_int(interp,
raw_sig, arg_index);
const INTVAL constant = PARROT_ARG_CONSTANT_ISSET(arg_flags);
const INTVAL raw_index = raw_args[arg_index + 2];
switch (PARROT_ARG_TYPE_MASK_MASK(arg_flags)) {
case PARROT_ARG_INTVAL:
if (constant)
VTABLE_push_integer(interp, call_object, raw_index);
else
VTABLE_push_integer(interp, call_object, CTX_REG_INT(ctx, raw_index));
break;
case PARROT_ARG_FLOATVAL:
if (constant)
VTABLE_push_float(interp, call_object,
ctx->constants[raw_index]->u.number);
else
VTABLE_push_float(interp, call_object, CTX_REG_NUM(ctx, raw_index));
break;
case PARROT_ARG_STRING:
{
STRING *string_value;
if (constant)
/* ensure that callees don't modify constant caller strings */
string_value = Parrot_str_new_COW(interp,
ctx->constants[raw_index]->u.string);
else
string_value = CTX_REG_STR(ctx, raw_index);
if (arg_flags & PARROT_ARG_NAME)
extract_named_arg_from_op(interp, call_object, string_value,
raw_sig, raw_args, raw_index);
else
VTABLE_push_string(interp, call_object, string_value);
break;
}
case PARROT_ARG_PMC:
{
PMC *pmc_value;
if (constant)
pmc_value = ctx->constants[raw_index]->u.key;
else
pmc_value = CTX_REG_PMC(ctx, raw_index);
if (arg_flags & PARROT_ARG_FLATTEN)
dissect_aggregate_arg(interp, call_object, pmc_value);
else
VTABLE_push_pmc(interp, call_object, CTX_REG_PMC(ctx, raw_index));
break;
}
default:
break;
}
}
/* Check if we have an invocant, and add it to the front of the arguments */
/* if (!PMC_IS_NULL(interp->current_object)) {
string_sig = Parrot_str_concat(interp, CONST_STRING(interp, "Pi"), string_sig, 0);
VTABLE_set_string_native(interp, call_object, string_sig);
VTABLE_unshift_pmc(interp, call_object, interp->current_object);
}
*/
return call_object;
}
/*
=item C<static void extract_named_arg_from_op(PARROT_INTERP, PMC *call_object,
STRING *name, PMC * const raw_sig, opcode_t * const raw_args, INTVAL arg_index)>
Pulls in the next argument from a set_args opcode, and sets it as the
value of a named argument in the CallSignature PMC.
=cut
*/
static void
extract_named_arg_from_op(PARROT_INTERP, ARGMOD(PMC *call_object), ARGIN(STRING *name),
ARGIN(PMC * const raw_sig), ARGIN(opcode_t * const raw_args),
INTVAL arg_index)
{
ASSERT_ARGS(extract_named_arg_from_op)
Parrot_Context *ctx = CONTEXT(interp);
INTVAL arg_flags = VTABLE_get_integer_keyed_int(interp,
raw_sig, arg_index);
const INTVAL constant = PARROT_ARG_CONSTANT_ISSET(arg_flags);
const INTVAL raw_index = raw_args[arg_index + 2];
switch (PARROT_ARG_TYPE_MASK_MASK(arg_flags)) {
case PARROT_ARG_INTVAL:
if (constant)
VTABLE_set_integer_keyed_str(interp, call_object, name, raw_index);
else
VTABLE_set_integer_keyed_str(interp, call_object, name,
CTX_REG_INT(ctx, raw_index));
break;
case PARROT_ARG_FLOATVAL:
if (constant)
VTABLE_set_number_keyed_str(interp, call_object, name,
ctx->constants[raw_index]->u.number);
else
VTABLE_set_number_keyed_str(interp, call_object, name,
CTX_REG_NUM(ctx, raw_index));
break;
case PARROT_ARG_STRING:
if (constant)
/* ensure that callees don't modify constant caller strings */
VTABLE_set_string_keyed_str(interp, call_object, name,
Parrot_str_new_COW(interp,
ctx->constants[raw_index]->u.string));
else
VTABLE_set_string_keyed_str(interp, call_object, name,
CTX_REG_STR(ctx, raw_index));
break;
case PARROT_ARG_PMC:
if (constant)
VTABLE_set_pmc_keyed_str(interp, call_object, name,
ctx->constants[raw_index]->u.key);
else
VTABLE_set_pmc_keyed_str(interp, call_object, name,
CTX_REG_PMC(ctx, raw_index));
break;
default:
break;
}
}
/*
=item C<static void dissect_aggregate_arg(PARROT_INTERP, PMC *call_object, PMC
*aggregate)>
Takes an aggregate PMC and splits it up into individual arguments,
adding each one to the CallSignature PMC. If the aggregate is an array,
its elements are added as positional arguments. If the aggregate is a
hash, its key/value pairs are added as named arguments.
=cut
*/
static void
dissect_aggregate_arg(PARROT_INTERP, ARGMOD(PMC *call_object), ARGIN(PMC *aggregate))
{
ASSERT_ARGS(dissect_aggregate_arg)
if (VTABLE_does(interp, aggregate, CONST_STRING(interp, "array"))) {
INTVAL elements = VTABLE_elements(interp, aggregate);
INTVAL index;
for (index = 0; index < elements; index++) {
VTABLE_push_pmc(interp, call_object,
VTABLE_get_pmc_keyed_int(interp, aggregate, index));
}
}
else if (VTABLE_does(interp, aggregate, CONST_STRING(interp, "hash"))) {
INTVAL elements = VTABLE_elements(interp, aggregate);
INTVAL index;
PMC *key = pmc_new(interp, enum_class_Key);
VTABLE_set_integer_native(interp, key, 0);
SETATTR_Key_next_key(interp, key, (PMC *)INITBucketIndex);
/* Low-level hash iteration. */
for (index = 0; index < elements; index++) {
if (!PMC_IS_NULL(key)) {
STRING *name = (STRING *)parrot_hash_get_idx(interp,
(Hash *)VTABLE_get_pointer(interp, aggregate), key);
PARROT_ASSERT(name);
VTABLE_set_pmc_keyed_str(interp, call_object, name,
VTABLE_get_pmc_keyed_str(interp, aggregate, name));
}
}
}
else {
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"flattened parameters must be a hash or array");
}
}
/*
=item C<PMC* Parrot_pcc_build_sig_object_returns_from_op(PARROT_INTERP, PMC
*signature, PMC *raw_sig, opcode_t *raw_args)>
Take a raw signature and argument list from a set_results opcode and
convert it to a CallSignature PMC. Uses an existing CallSignature PMC if
one was already created for set_args. Otherwise, creates a new one.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_sig_object_returns_from_op(PARROT_INTERP, ARGIN_NULLOK(PMC *signature),
ARGIN(PMC *raw_sig), ARGIN(opcode_t *raw_args))
{
ASSERT_ARGS(Parrot_pcc_build_sig_object_from_op)
PMC *call_object;
INTVAL arg_index;
INTVAL arg_count = VTABLE_elements(interp, raw_sig);
Parrot_Context *ctx = CONTEXT(interp);
PMC *returns = pmc_new(interp, enum_class_ResizablePMCArray);
if (PMC_IS_NULL(signature))
call_object = pmc_new(interp, enum_class_CallSignature);
else
call_object = signature;
VTABLE_set_attr_str(interp, call_object, CONST_STRING(interp, "return_flags"), raw_sig);
VTABLE_set_attr_str(interp, call_object, CONST_STRING(interp, "returns"), returns);
for (arg_index = 0; arg_index < arg_count; arg_index++) {
STRING * const signature = CONST_STRING(interp, "signature");
INTVAL arg_flags = VTABLE_get_integer_keyed_int(interp,
raw_sig, arg_index);
const INTVAL raw_index = raw_args[arg_index + 2];
/* Returns store a pointer to the register, so they can pass
* the result back to the caller. */
PMC * const val_pointer = pmc_new(interp, enum_class_CPointer);
VTABLE_push_pmc(interp, returns, val_pointer);
switch (PARROT_ARG_TYPE_MASK_MASK(arg_flags)) {
case PARROT_ARG_INTVAL:
VTABLE_set_pointer(interp, val_pointer, (void *) &(CTX_REG_INT(ctx, raw_index)));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "I"));
break;
case PARROT_ARG_FLOATVAL:
VTABLE_set_pointer(interp, val_pointer, (void *) &(CTX_REG_NUM(ctx, raw_index)));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "N"));
break;
case PARROT_ARG_STRING:
VTABLE_set_pointer(interp, val_pointer, (void *) &(CTX_REG_STR(ctx, raw_index)));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "S"));
break;
case PARROT_ARG_PMC:
VTABLE_set_pointer(interp, val_pointer, (void *) &(CTX_REG_PMC(ctx, raw_index)));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "P"));
break;
default:
break;
}
}
return call_object;
}
/*
=item C<PMC* Parrot_pcc_build_sig_object_from_varargs(PARROT_INTERP, PMC *obj,
const char *sig, va_list args)>
Take a varargs list, and convert it into a CallSignature PMC. The CallSignature
stores the original short signature string, and an array of integer types to
pass on to the multiple dispatch search.
=cut
*/
PARROT_EXPORT
PARROT_WARN_UNUSED_RESULT
PARROT_CANNOT_RETURN_NULL
PMC*
Parrot_pcc_build_sig_object_from_varargs(PARROT_INTERP, ARGIN_NULLOK(PMC *obj),
ARGIN(const char *sig), va_list args)
{
ASSERT_ARGS(Parrot_pcc_build_sig_object_from_varargs)
PMC *type_tuple = PMCNULL;
PMC *returns = PMCNULL;
PMC *arg_flags = PMCNULL;
PMC *return_flags = PMCNULL;
PMC *call_object = pmc_new(interp, enum_class_CallSignature);
STRING *string_sig = Parrot_str_new_constant(interp, sig);
const INTVAL sig_len = Parrot_str_byte_length(interp, string_sig);
INTVAL in_return_sig = 0;
INTVAL i;
if (!sig_len)
return call_object;
VTABLE_set_string_native(interp, call_object, string_sig);
parse_signature_string(interp, sig, &arg_flags, &return_flags);
VTABLE_set_attr_str(interp, call_object, CONST_STRING(interp, "arg_flags"), arg_flags);
VTABLE_set_attr_str(interp, call_object, CONST_STRING(interp, "return_flags"), return_flags);
/* Process the varargs list */
for (i = 0; i < sig_len; ++i) {
const INTVAL type = Parrot_str_indexed(interp, string_sig, i);
/* Only create the returns array if it's needed */
if (in_return_sig && PMC_IS_NULL(returns)) {
returns = pmc_new(interp, enum_class_ResizablePMCArray);
VTABLE_set_attr_str(interp, call_object, CONST_STRING(interp, "returns"), returns);
}
if (in_return_sig) {
STRING * const signature = CONST_STRING(interp, "signature");
/* Returns store the original passed-in pointer, so they can pass
* the result back to the caller. */
PMC * const val_pointer = pmc_new(interp, enum_class_CPointer);
VTABLE_push_pmc(interp, returns, val_pointer);
switch (type) {
case 'I':
VTABLE_set_pointer(interp, val_pointer, (void *)va_arg(args, INTVAL *));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "I"));
break;
case 'N':
VTABLE_set_pointer(interp, val_pointer, (void *)va_arg(args, FLOATVAL *));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "N"));
break;
case 'S':
VTABLE_set_pointer(interp, val_pointer, (void *)va_arg(args, STRING **));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "S"));
break;
case 'P':
VTABLE_set_pointer(interp, val_pointer, (void *)va_arg(args, PMC **));
VTABLE_set_string_keyed_str(interp, val_pointer, signature, CONST_STRING(interp, "P"));
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"Multiple Dispatch: invalid argument type %c!", type);
}
}
else {
/* Regular arguments just set the value */
switch (type) {
case 'I':
VTABLE_push_integer(interp, call_object, va_arg(args, INTVAL));
break;
case 'N':
VTABLE_push_float(interp, call_object, va_arg(args, FLOATVAL));
break;
case 'S':
VTABLE_push_string(interp, call_object, va_arg(args, STRING *));
break;
case 'P':
{
PMC * const pmc_arg = va_arg(args, PMC *);
VTABLE_push_pmc(interp, call_object, pmc_arg);
break;
}
case '-':
i++; /* skip '>' */
in_return_sig = 1;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"Multiple Dispatch: invalid argument type %c!", type);
}
}
}
/* Check if we have an invocant, and add it to the front of the arguments */
if (!PMC_IS_NULL(obj)) {
string_sig = Parrot_str_concat(interp, CONST_STRING(interp, "Pi"), string_sig, 0);
VTABLE_set_string_native(interp, call_object, string_sig);
VTABLE_unshift_pmc(interp, call_object, obj);
}
/* Build a type_tuple for multiple dispatch */
type_tuple = Parrot_mmd_build_type_tuple_from_sig_obj(interp, call_object);
VTABLE_set_pmc(interp, call_object, type_tuple);
return call_object;
}
/*
=item C<void Parrot_pcc_fill_params_from_op(PARROT_INTERP, PMC *call_object, PMC
*raw_sig, opcode_t *raw_params)>
Gets args for the current function call and puts them into position.
First it gets the positional non-slurpy parameters, then the positional
slurpy parameters, then the named parameters, and finally the named
slurpy parameters.
=cut
*/
PARROT_EXPORT
void
Parrot_pcc_fill_params_from_op(PARROT_INTERP, ARGMOD(PMC *call_object),
ARGIN(PMC *raw_sig), ARGIN(opcode_t *raw_params))
{
ASSERT_ARGS(Parrot_pcc_fill_params_from_op)
Parrot_Context *ctx = CONTEXT(interp);
INTVAL positional_elements = VTABLE_elements(interp, call_object);
INTVAL param_count = VTABLE_elements(interp, raw_sig);
STRING *param_name = NULL;
INTVAL param_index = 0;
INTVAL positional_index = 0;
INTVAL named_count = 0;
INTVAL slurpy_count = 0;
INTVAL optional_count = 0;
INTVAL err_check = 0;
INTVAL got_optional = -1;
/* Check if we should be throwing errors. This is configured separately
* for parameters and return values. */
if (PARROT_ERRORS_test(interp, PARROT_ERRORS_PARAM_COUNT_FLAG))
err_check = 1;
for (param_index = 0; param_index < param_count; param_index++) {
INTVAL param_flags = VTABLE_get_integer_keyed_int(interp,
raw_sig, param_index);
const INTVAL raw_index = raw_params[param_index + 2];
/* opt_flag parameter */
if (param_flags & PARROT_ARG_OPT_FLAG) {
if (optional_count <= 0)
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"optional flag with no optional parameter");
if (got_optional < 0 || got_optional > 1)
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"unable to determine if optional argument was passed");
CTX_REG_INT(ctx, raw_index) = got_optional;
got_optional = -1;
break; /* on to next parameter */
}
/* Collected ("slurpy") parameter */
else if (param_flags & PARROT_ARG_SLURPY_ARRAY) {
/* Collect named arguments into hash */
if (param_flags & PARROT_ARG_NAME) {
PMC * const collect_named = pmc_new(interp,
Parrot_get_ctx_HLL_type(interp, enum_class_Hash));
CTX_REG_PMC(ctx, raw_index) = collect_named;
named_count += VTABLE_elements(interp, collect_named);
}
/* Collect positional arguments into array */
else {
PMC *collect_positional;
if (named_count > 0)
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION,
"named parameters must follow all positional parameters");
collect_positional = pmc_new(interp,
Parrot_get_ctx_HLL_type(interp, enum_class_ResizablePMCArray));
for (; positional_index < positional_elements; positional_index++) {
VTABLE_push_pmc(interp, collect_positional,
VTABLE_get_pmc_keyed_int(interp, call_object, positional_index));
}
CTX_REG_PMC(ctx, raw_index) = collect_positional;
}
break; /* on to next parameter */
}
/* Named non-collected */
else if (param_flags & PARROT_ARG_NAME) {
/* Just store the name for now (this parameter is only the
* name). The next parameter is the actual value. */
param_name = PARROT_ARG_CONSTANT_ISSET(param_flags)
? ctx->constants[raw_index]->u.string
: CTX_REG_STR(ctx, raw_index);
break; /* on to next parameter */
}
else if (!STRING_IS_NULL(param_name)) {
/* The previous parameter was a parameter name. Now set the
* value of the named parameter.*/
if (VTABLE_exists_keyed_str(interp, call_object, param_name)) {
named_count++;
switch (PARROT_ARG_TYPE_MASK_MASK(param_flags)) {
case PARROT_ARG_INTVAL:
CTX_REG_INT(ctx, raw_index) =
VTABLE_get_integer_keyed_str(interp, call_object, param_name);
break;
case PARROT_ARG_FLOATVAL:
CTX_REG_NUM(ctx, raw_index) =
VTABLE_get_number_keyed_str(interp, call_object, param_name);
break;
case PARROT_ARG_STRING:
CTX_REG_STR(ctx, raw_index) =
VTABLE_get_string_keyed_str(interp, call_object, param_name);
break;
case PARROT_ARG_PMC:
CTX_REG_PMC(ctx, raw_index) =
VTABLE_get_pmc_keyed_str(interp, call_object, param_name);
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION, "invalid parameter type");
break;
}
param_name = NULL;
break; /* on to next parameter */
}
/* If the named parameter doesn't have a corresponding named
* argument, fall through to positional argument handling. */
param_name = NULL;
}
/* Positional non-collected */
if (named_count > 0)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"named parameters must follow all positional parameters");
if (slurpy_count > 0)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"slurpy parameters must follow ordinary positional parameters");
/* No more positional arguments available to assign */
if (positional_index >= positional_elements) {
if (!param_flags & PARROT_ARG_OPTIONAL)
Parrot_ex_throw_from_c_args(interp, NULL, EXCEPTION_INVALID_OPERATION,
"too few positional arguments: %d passed, %d (or more) expected",
positional_elements, param_index + 1);
got_optional = 0;
optional_count++;
switch (PARROT_ARG_TYPE_MASK_MASK(param_flags)) {
case PARROT_ARG_INTVAL:
CTX_REG_INT(ctx, raw_index) = 0;
break;
case PARROT_ARG_FLOATVAL:
CTX_REG_NUM(ctx, raw_index) = 0.0;
break;
case PARROT_ARG_STRING:
CTX_REG_STR(ctx, raw_index) = NULL;
break;
case PARROT_ARG_PMC:
CTX_REG_PMC(ctx, raw_index) = PMCNULL;
break;
default:
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_INVALID_OPERATION, "invalid parameter type");
break;
}
break; /* on to next parameter */
}
/* Otherwise, we have a positional argument to assign to the
* positional parameter, so go ahead and assign it. */
if (param_flags & PARROT_ARG_OPTIONAL) {
got_optional = 1;
optional_count++;
}
switch (PARROT_ARG_TYPE_MASK_MASK(param_flags)) {
case PARROT_ARG_INTVAL:
CTX_REG_INT(ctx, raw_index) =
VTABLE_get_integer_keyed_int(interp, call_object, positional_index);
positional_index++;
break;
case PARROT_ARG_FLOATVAL:
CTX_REG_NUM(ctx, raw_index) =
VTABLE_get_number_keyed_int(interp, call_object, positional_index);