/
hash.pmc
1173 lines (773 loc) · 25.6 KB
/
hash.pmc
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/*
Copyright (C) 2001-2009, Parrot Foundation.
$Id$
=head1 NAME
src/pmc/hash.pmc - Hash PMC
=head1 DESCRIPTION
These are the vtable functions for the Hash PMC.
=head2 Functions
=over 4
=cut
*/
#include "pmc_iterator.h"
#include "pmc_key.h"
/*
=item C<static PMC *get_integer_pmc(PARROT_INTERP, INTVAL base_type )>
Lookup the PMC type which is used for storing native integers.
=cut
*/
static PMC *get_integer_pmc(PARROT_INTERP, INTVAL base_type) {
UNUSED(base_type)
return pmc_new(interp, Parrot_get_ctx_HLL_type(interp, enum_class_Integer));
}
/*
=item C<static PMC *get_number_pmc(PARROT_INTERP, INTVAL base_type )>
Lookup the PMC type which is used for floating point numbers.
=cut
*/
static PMC *get_number_pmc(PARROT_INTERP, INTVAL base_type) {
UNUSED(base_type)
return pmc_new(interp, Parrot_get_ctx_HLL_type(interp, enum_class_Float));
}
/*
=item C<static PMC *get_string_pmc(PARROT_INTERP, INTVAL base_type )>
Lookup the PMC type which is used for storing strings.
=cut
*/
static PMC *get_string_pmc(PARROT_INTERP, INTVAL base_type) {
UNUSED(base_type)
return pmc_new(interp, Parrot_get_ctx_HLL_type(interp, enum_class_String));
}
/*
=item C<static STRING *make_ro_hash_key(PARROT_INTERP, PMC *key)>
Returns a Parrot STRING for C<*key>.
You I<must not> modify this STRING, nor pass it to anything which may store it.
It's only safe to use for looking up elements of a hash or deleting them --
I<never> storing them. (If you have to ask why, don't use this function. It's
for optimization purposes only.)
=cut
*/
static STRING
*make_ro_hash_key(PARROT_INTERP, NOTNULL(PMC *key))
{
STRING *s;
switch (PObj_get_FLAGS(key) & KEY_type_FLAGS) {
case KEY_string_FLAG:
GETATTR_Key_str_key(interp, key, s);
break;
case KEY_string_FLAG | KEY_register_FLAG:
{
INTVAL int_key;
GETATTR_Key_int_key(interp, key, int_key);
s = REG_STR(interp, int_key);
break;
}
default:
s = key_string(interp, key);
}
if (STRING_IS_NULL(s))
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_UNEXPECTED_NULL, "Hash: Cannot use NULL STRING key");
return s;
}
/*
=item C<static STRING *make_hash_key(PARROT_INTERP, PMC *key)>
Returns a Parrot STRING for C<*key>. This STRING is safe to modify or store.
=cut
*/
PARROT_CANNOT_RETURN_NULL
static STRING
*make_hash_key(PARROT_INTERP, NOTNULL(PMC *key))
{
STRING * const keystr = key_string(interp, key);
if (STRING_IS_NULL(keystr))
Parrot_ex_throw_from_c_args(interp, NULL,
EXCEPTION_UNEXPECTED_NULL, "Hash: Cannot use NULL STRING key");
return keystr;
}
/* Needs ext struct for the next_for_GC pointer
* We would get recursive marking of a deeply nested HoHoH...
*/
pmclass Hash need_ext provides hash {
ATTR Hash *hash;
/*
=item C<void init()>
Initializes the instance.
=item C<void destroy()>
Free hash structure.
=cut
*/
VTABLE void init() {
Parrot_Hash_attributes * const attr =
mem_allocate_typed(Parrot_Hash_attributes);
PMC_data(SELF) = attr;
attr->hash = parrot_new_hash(INTERP);
PObj_custom_mark_destroy_SETALL(SELF);
}
VTABLE void destroy() {
Hash *hash = (Hash *)SELF.get_pointer();
if (hash)
parrot_hash_destroy(INTERP, hash);
mem_sys_free(PMC_data(SELF));
}
/*
=item C<void mark()>
Marks the hash as live.
=cut
*/
VTABLE void mark() {
Hash *hash = (Hash *)SELF.get_pointer();
if (hash != NULL)
parrot_mark_hash(INTERP, hash);
}
/*
=item C<PMC *clone()>
Creates and returns a clone of the hash.
=cut
*/
VTABLE PMC *clone() {
PMC * const dest = pmc_new(INTERP, SELF->vtable->base_type);
parrot_hash_clone(INTERP, (Hash *)SELF.get_pointer(),
(Hash *)VTABLE_get_pointer(INTERP, dest));
return dest;
}
/*
=item C<void set_pointer(void *ptr)>
Use C<ptr> as this PMC's Hash*.
=cut
*/
VTABLE void set_pointer(void *ptr) {
Hash *old_hash = (Hash *)SELF.get_pointer();
Hash *new_hash = (Hash *)ptr;
PARROT_HASH(SELF)->hash = new_hash;
new_hash->container = SELF;
if (old_hash)
parrot_hash_destroy(INTERP, old_hash);
}
/*
=item C<void *get_pointer()>
Get a pointer to this PMC's Hash*.
=cut
*/
VTABLE void *get_pointer() {
return PARROT_HASH(SELF)->hash;
}
/*
=item C<INTVAL get_integer()>
Returns the size of the hash.
=cut
*/
VTABLE INTVAL get_integer() {
return parrot_hash_size(INTERP, (Hash *)SELF.get_pointer());
}
/*
=item C<INTVAL get_integer_keyed_str(STRING *key)>
=item C<INTVAL get_integer_keyed_int(INTVAL key)>
=cut
*/
VTABLE INTVAL get_integer_keyed_str(STRING *key) {
HashBucket * const b =
parrot_hash_get_bucket(INTERP, (Hash *)SELF.get_pointer(), key);
if (!b)
return 0;
return VTABLE_get_integer(INTERP, (PMC*) b->value);
}
VTABLE INTVAL get_integer_keyed_int(INTVAL key) {
const Hash * const hash = (Hash *)SELF.get_pointer();
HashBucket *b;
if (hash->key_type == Hash_key_type_STRING)
return SELF.get_integer_keyed_str(Parrot_str_from_int(INTERP, key));
b = parrot_hash_get_bucket(INTERP, hash, (void *)key);
if (!b)
return 0;
return (INTVAL)b->value;
}
/*
=item C<INTVAL get_integer_keyed(PMC *key)>
Returns the integer value for the element at C<*key>.
=cut
*/
VTABLE INTVAL get_integer_keyed(PMC *key) {
PMC *valpmc;
STRING *keystr;
HashBucket *b;
PMC *nextkey;
const Hash * const hash = (Hash *)SELF.get_pointer();
/* called from iterator with an integer idx in key */
if ((PObj_get_FLAGS(key) & KEY_type_FLAGS) == KEY_hash_iterator_FLAGS) {
/* check if we really have Hash_key_type_int */
if (hash->key_type == Hash_key_type_int) {
void *idx = parrot_hash_get_idx(INTERP, hash, key);
return (INTVAL)idx;
}
else {
const STRING * const s =
(STRING *)parrot_hash_get_idx(INTERP, hash, key);
return Parrot_str_to_int(INTERP, s);
}
}
keystr = make_ro_hash_key(INTERP, key);
b = parrot_hash_get_bucket(INTERP, hash, keystr);
if (!b)
return 0;
nextkey = key_next(INTERP, key);
valpmc = (PMC *)b->value;
if (!nextkey)
return VTABLE_get_integer(INTERP, valpmc);
return VTABLE_get_integer_keyed(INTERP, valpmc, nextkey);
}
/*
=item C<FLOATVAL get_number()>
Returns the size of the hash.
=cut
*/
VTABLE FLOATVAL get_number() {
/* doing this in two steps avoids dodgy cast warnings with -O */
const INTVAL size = parrot_hash_size(INTERP, (Hash *)SELF.get_pointer());
return (FLOATVAL)size;
}
/*
=item C<FLOATVAL get_number_keyed_str(STRING *key)>
=item C<FLOATVAL get_number_keyed_int(INTVAL key)>
=cut
*/
VTABLE FLOATVAL get_number_keyed_str(STRING *key) {
HashBucket * const b =
parrot_hash_get_bucket(INTERP, (Hash *)SELF.get_pointer(), key);
if (!b)
return 0.0;
return VTABLE_get_number(INTERP, (PMC *)b->value);
}
VTABLE FLOATVAL get_number_keyed_int(INTVAL key) {
STRING * const s = Parrot_str_from_int(INTERP, key);
return SELF.get_number_keyed_str(s);
}
/*
=item C<FLOATVAL get_number_keyed(PMC *key)>
Returns the floating-point value for the element at C<*key>.
=cut
*/
VTABLE FLOATVAL get_number_keyed(PMC *key) {
PMC *nextkey;
PMC *valpmc;
STRING * const keystr = make_ro_hash_key(INTERP, key);
HashBucket * const b = parrot_hash_get_bucket(INTERP,
(Hash *)SELF.get_pointer(), keystr);
if (!b)
return 0.0;
nextkey = key_next(INTERP, key);
valpmc = (PMC *)b->value;
if (!nextkey)
return VTABLE_get_number(INTERP, valpmc);
return VTABLE_get_number_keyed(INTERP, valpmc, nextkey);
}
/*
=item C<STRING *get_string()>
Returns a string representation of the hash, showing its class name and
memory address.
=item C<STRING *get_repr()>
Return a representation of the hash contents.
=cut
*/
VTABLE STRING *get_string() {
return Parrot_sprintf_c(INTERP, "Hash[0x%x]", SELF);
}
VTABLE STRING *get_repr() {
/* RT #44643 use freeze */
PMC * const iter = VTABLE_get_iter(INTERP, SELF);
STRING *res = CONST_STRING(INTERP, "{");
const INTVAL n = VTABLE_elements(INTERP, SELF);
INTVAL j;
for (j = 0; j < n; ++j) {
STRING * const key = VTABLE_shift_string(INTERP, iter);
int all_digit = 1;
int i;
PMC *val;
for (i = 0; i < (int)key->strlen; ++i) {
if (!isdigit((unsigned char)((char *)key->strstart)[i])) {
all_digit = 0;
break;
}
}
if (all_digit) {
res = Parrot_str_append(INTERP, res, key);
}
else {
res = Parrot_str_append(INTERP, res, CONST_STRING(INTERP, "'"));
res = Parrot_str_append(INTERP, res, key);
res = Parrot_str_append(INTERP, res, CONST_STRING(INTERP, "'"));
}
res = Parrot_str_append(INTERP, res, CONST_STRING(INTERP, ": "));
val = SELF.get_pmc_keyed_str(key);
res = Parrot_str_append(INTERP, res, VTABLE_get_string(INTERP, val));
if (j < n - 1)
res = Parrot_str_append(INTERP, res, CONST_STRING(INTERP, ", "));
}
res = Parrot_str_append(INTERP, res, CONST_STRING(INTERP, "}"));
return res;
}
/*
=item C<STRING *get_string_keyed_str(STRING *key)>
=item C<STRING *get_string_keyed_int(INTVAL key)>
=cut
*/
VTABLE STRING *get_string_keyed_str(STRING *key) {
HashBucket * const b =
parrot_hash_get_bucket(INTERP, (Hash *)SELF.get_pointer(), key);
if (!b)
return Parrot_str_new_noinit(INTERP, enum_stringrep_one, 0);
return VTABLE_get_string(INTERP, (PMC*) b->value);
}
VTABLE STRING *get_string_keyed_int(INTVAL key) {
STRING * const s = Parrot_str_from_int(INTERP, key);
return SELF.get_string_keyed_str(s);
}
/*
=item C<STRING *get_string_keyed(PMC *key)>
Returns the string value for the element at C<*key>.
=cut
*/
VTABLE STRING *get_string_keyed(PMC *key) {
PMC *valpmc;
STRING *keystr;
HashBucket *b;
PMC *nextkey;
Hash * const hash = (Hash *)SELF.get_pointer();
if ((PObj_get_FLAGS(key) & KEY_type_FLAGS) == KEY_hash_iterator_FLAGS) {
/* called from iterator with an integer idx in key */
if (hash->key_type == Hash_key_type_int) {
void *idx = parrot_hash_get_idx(INTERP, hash, key);
return Parrot_str_from_int(INTERP, (INTVAL)idx);
}
return (STRING *)parrot_hash_get_idx(INTERP, hash, key);
}
keystr = make_ro_hash_key(INTERP, key);
b = parrot_hash_get_bucket(INTERP, hash, keystr);
if (!b)
return Parrot_str_new_noinit(INTERP, enum_stringrep_one, 0);
nextkey = key_next(INTERP, key);
valpmc = (PMC *)b->value;
if (!nextkey)
return VTABLE_get_string(INTERP, valpmc);
return VTABLE_get_string_keyed(INTERP, valpmc, nextkey);
}
/*
=item C<INTVAL get_bool()>
Returns true if the hash size is not zero.
=cut
*/
VTABLE INTVAL get_bool() {
return parrot_hash_size(INTERP, (Hash *)SELF.get_pointer()) != 0;
}
/*
=item C<INTVAL elements()>
Returns the number of elements in the hash.
=cut
*/
VTABLE INTVAL elements() {
return parrot_hash_size(INTERP, (Hash *)SELF.get_pointer());
}
/*
=item C<PMC *get_pmc_keyed_str(STRING *key)>
=item C<PMC *get_pmc_keyed_int(INTVAL key)>
=cut
*/
VTABLE PMC *get_pmc_keyed_str(STRING *key) {
HashBucket * const b =
parrot_hash_get_bucket(INTERP, (Hash *)SELF.get_pointer(), key);
if (!b)
return PMCNULL;
return (PMC *)b->value;
}
VTABLE PMC *get_pmc_keyed_int(INTVAL key) {
STRING * const s = Parrot_str_from_int(INTERP, key);
return SELF.get_pmc_keyed_str(s);
}
/*
=item C<PMC *get_iter()>
Return a new iterator for the slice PMC C<key>
=item C<PMC *get_pmc_keyed(PMC *key)>
Returns the PMC value for the element at C<*key>.
=cut
*/
VTABLE PMC *get_iter() {
PMC * const iter = pmc_new_init(INTERP, enum_class_Iterator, SELF);
PMC * const key = pmc_new(INTERP, enum_class_Key);
SETATTR_Iterator_key(INTERP, iter, key);
PObj_get_FLAGS(key) |= KEY_hash_iterator_FLAGS;
SETATTR_Key_next_key(INTERP, key, (PMC *)INITBucketIndex);
/* -1 for an empty hash, 0 for a non-empty hash. */
SETATTR_Key_int_key(INTERP, key,
parrot_hash_size(INTERP, (Hash *)SELF.get_pointer()) ? 0 : -1);
return iter;
}
VTABLE PMC *slice(PMC *key) {
return PMCNULL;
}
VTABLE PMC *get_pmc_keyed(PMC *key) {
const Hash * const hash = (Hash *)SELF.get_pointer();
STRING *keystr;
HashBucket *b;
PMC *nextkey;
/* called from iterator with an integer idx in key */
if ((PObj_get_FLAGS(key) & KEY_type_FLAGS) == KEY_hash_iterator_FLAGS) {
PMC *result;
/* check if we really have Hash_key_type_int */
if (hash->key_type == Hash_key_type_int) {
void *idx = parrot_hash_get_idx(INTERP, hash, key);
const INTVAL i = (INTVAL)idx;
result = pmc_new(INTERP, enum_class_Integer);
VTABLE_set_integer_native(INTERP, result, i);
}
else {
STRING *s = (STRING *)parrot_hash_get_idx(INTERP, hash, key);
result = pmc_new(INTERP, enum_class_String);
VTABLE_set_string_native(INTERP, result, s);
}
return result;
}
keystr = make_ro_hash_key(INTERP, key);
b = parrot_hash_get_bucket(INTERP, hash, keystr);
if (!b)
return PMCNULL;
nextkey = key_next(INTERP, key);
if (!nextkey)
return (PMC *)b->value;
return VTABLE_get_pmc_keyed(INTERP, (PMC*)b->value, nextkey);
}
/*
=item C<INTVAL is_same(const PMC *other)>
Returns whether the hash is the same as C<*other>.
=cut
*/
VTABLE INTVAL is_same(PMC *other) {
return (INTVAL)(other->vtable == SELF->vtable &&
VTABLE_get_pointer(INTERP, other) == SELF.get_pointer());
}
/*
=item C<void set_integer_keyed(PMC *key, INTVAL value)>
=cut
*/
VTABLE void set_integer_keyed(PMC *key, INTVAL value) {
STRING *keystr;
PMC *nextkey;
PMC *box;
if (!key)
return;
keystr = make_hash_key(INTERP, key);
nextkey = key_next(INTERP, key);
if (!nextkey) {
PMC *val = get_integer_pmc(INTERP, SELF->vtable->base_type);
VTABLE_set_integer_native(INTERP, val, value);
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), keystr, val);
return;
}
box = SELF.get_pmc_keyed_str(keystr);
/* autovivify an Hash */
if (!box)
box = pmc_new(INTERP, SELF.type());
VTABLE_set_integer_keyed(INTERP, box, nextkey, value);
}
VTABLE void set_integer_keyed_int(INTVAL key, INTVAL value) {
Hash * const hash = (Hash *)SELF.get_pointer();
/* check if we really have Hash_key_type_int */
if (hash->key_type == Hash_key_type_int) {
parrot_hash_put(INTERP, hash, (void *)key, (void *)value);
}
else {
SUPER(key, value);
}
}
/*
=item C<void set_integer_keyed_str(STRING *key, INTVAL value)>
=cut
*/
VTABLE void set_integer_keyed_str(STRING *key, INTVAL value) {
PMC * const val = get_integer_pmc(INTERP, SELF->vtable->base_type);
VTABLE_set_integer_native(INTERP, val, value);
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), key, val);
}
/*
=item C<void set_number_keyed(PMC *key, FLOATVAL value)>
=cut
*/
VTABLE void set_number_keyed(PMC *key, FLOATVAL value) {
STRING *keystr;
PMC *nextkey;
PMC *box;
if (!key)
return;
keystr = make_hash_key(INTERP, key);
nextkey = key_next(INTERP, key);
if (!nextkey) {
PMC *val = get_number_pmc(INTERP, SELF->vtable->base_type);
VTABLE_set_number_native(INTERP, val, value);
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), keystr, val);
return;
}
box = SELF.get_pmc_keyed_str(keystr);
/* autovivify an Hash */
if (!box)
box = pmc_new(INTERP, SELF.type());
VTABLE_set_number_keyed(INTERP, box, nextkey, value);
}
/*
=item C<void set_number_keyed_str(STRING *key, FLOATVAL value)>
Sets C<value> as the value for C<*key>.
=cut
*/
VTABLE void set_number_keyed_str(STRING *key, FLOATVAL value) {
PMC * const val = get_number_pmc(INTERP, SELF->vtable->base_type);
VTABLE_set_number_native(INTERP, val, value);
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), key, val);
}
/*
=item C<void set_string_keyed(PMC *key, STRING *value)>
=cut
*/
VTABLE void set_string_keyed(PMC *key, STRING *value) {
STRING *keystr;
PMC *nextkey;
PMC *box;
if (!key)
return;
keystr = make_hash_key(INTERP, key);
nextkey = key_next(INTERP, key);
if (!nextkey) {
PMC * const val = get_string_pmc(INTERP, SELF->vtable->base_type);
VTABLE_set_string_native(INTERP, val, value);
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), keystr, val);
return;
}
box = SELF.get_pmc_keyed_str(keystr);
/* autovivify an Hash */
if (!box)
box = pmc_new(INTERP, SELF.type());
VTABLE_set_string_keyed(INTERP, box, nextkey, value);
}
/*
=item C<void set_string_keyed_str(STRING *key, STRING *value)>
=cut
*/
VTABLE void set_string_keyed_str(STRING *key, STRING *value) {
PMC * const val = get_string_pmc(INTERP, SELF->vtable->base_type);
VTABLE_set_string_native(INTERP, val, value);
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), key, val);
}
/*
=item C<void set_pmc_keyed(PMC *dest_key, PMC *value)>
=cut
*/
VTABLE void set_pmc_keyed(PMC *key, PMC *value) {
STRING *keystr;
PMC *nextkey;
PMC *box;
if (!key)
return;
keystr = make_hash_key(INTERP, key);
nextkey = key_next(INTERP, key);
if (!nextkey) {
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), keystr, value);
return;
}
box = SELF.get_pmc_keyed_str(keystr);
/* autovivify an Hash */
if (!box)
box = pmc_new(INTERP, SELF.type());
VTABLE_set_pmc_keyed(INTERP, box, nextkey, value);
}
/*
=item C<void set_pmc_keyed_str(STRING *key, PMC *value)>
Sets C<*value> as the value for C<*key>.
=cut
*/
VTABLE void set_pmc_keyed_str(STRING *key, PMC *value) {
parrot_hash_put(INTERP, (Hash *)SELF.get_pointer(), key, value);
}
/*
=item C<INTVAL is_equal(PMC *value)>
The C<==> operation.
Check if two hashes hold the same keys and values.
=cut
*/
VTABLE INTVAL is_equal(PMC *value) {
PMC * const iter = VTABLE_get_iter(INTERP, SELF);
INTVAL j, n;
if (value->vtable->base_type != SELF->vtable->base_type)
return 0;
n = SELF.elements();
if (VTABLE_elements(INTERP, value) != n)
return 0;
for (j = 0; j < n; ++j) {
STRING * const key = VTABLE_shift_string(INTERP, iter);
PMC *item1, *item2;
INTVAL result;
if (!VTABLE_exists_keyed_str(INTERP, value, key))
return 0;
item1 = SELF.get_pmc_keyed_str(key);
item2 = VTABLE_get_pmc_keyed_str(INTERP, value, key);
if (item1 == item2)
continue;
Parrot_mmd_multi_dispatch_from_c_args(INTERP, "is_equal",
"PP->I", item1, item2, &result);
if (!result)
return 0;
}
return 1;
}
/*
=item C<INTVAL exists_keyed_str(STRING *key)>
=cut
*/
VTABLE INTVAL exists_keyed_str(STRING *key) {
HashBucket * const b =
parrot_hash_get_bucket(INTERP, (Hash *)SELF.get_pointer(), key);
return b != NULL;
}
/*
=item C<INTVAL exists_keyed(PMC *key)>
Returns whether a key C<*key> exists in the hash.
=cut
*/
VTABLE INTVAL exists_keyed(PMC *key) {
Hash * const h = (Hash *)SELF.get_pointer();
STRING * const sx = make_ro_hash_key(INTERP, key);
HashBucket *b = parrot_hash_get_bucket(INTERP, h, sx);
/* no such key */
if (!b)
return 0;
key = key_next(INTERP, key);
/* lookup stops here */
if (!key)
return 1;
return VTABLE_exists_keyed(INTERP, (PMC *)b->value, key);
}
/*
=item C<INTVAL defined_keyed_str(STRING *key)>
=cut
*/
VTABLE INTVAL defined_keyed_str(STRING *key) {
HashBucket * const b =
parrot_hash_get_bucket(INTERP, (Hash *)SELF.get_pointer(), key);
/* no such key */
if (!b)
return 0;
return VTABLE_defined(INTERP, (PMC*)b->value);
}
/*
=item C<INTVAL defined_keyed(PMC *key)>
Returns whether the value for C<*key> is defined.