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* st.c (struct st_table_entry): add new members, fore and back, to

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iterate in inserted order.

* include/ruby/st.h (struct st_table): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@13124 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2007-08-21 04:43:51 +00:00
parent c629aecbc8
commit be4fc7941b
3 changed files with 174 additions and 93 deletions
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7
ChangeLog
View file

@ -1,3 +1,10 @@
Tue Aug 21 13:43:49 2007 Nobuyoshi Nakada <nobu@ruby-lang.org>
* st.c (struct st_table_entry): add new members, fore and back, to
iterate in inserted order.
* include/ruby/st.h (struct st_table): ditto.
Tue Aug 21 04:09:06 2007 Koichi Sasada <ko1@atdot.net>
* benchmark/bm_vm2_case.rb: add a new benchmark.

3
include/ruby/st.h
View file

@ -34,6 +34,7 @@ struct st_table {
int num_bins;
int num_entries;
struct st_table_entry **bins;
struct st_table_entry *head;
};
#define st_is_member(table,key) st_lookup(table,key,(st_data_t *)0)
@ -62,9 +63,11 @@ int st_delete_safe(st_table *, st_data_t *, st_data_t *, st_data_t);
int st_insert(st_table *, st_data_t, st_data_t);
int st_lookup(st_table *, st_data_t, st_data_t *);
int st_foreach(st_table *, int (*)(ANYARGS), st_data_t);
int st_reverse_foreach(st_table *, int (*)(ANYARGS), st_data_t);
void st_add_direct(st_table *, st_data_t, st_data_t);
void st_free_table(st_table *);
void st_cleanup_safe(st_table *, st_data_t);
void st_clear(st_table *);
st_table *st_copy(st_table *);
int st_numcmp(long, long);
int st_numhash(long);

257
st.c
View file

@ -24,6 +24,7 @@ struct st_table_entry {
st_data_t key;
st_data_t record;
st_table_entry *next;
st_table_entry *fore, *back;
};
#define ST_DEFAULT_MAX_DENSITY 5
@ -163,6 +164,7 @@ st_init_table_with_size(const struct st_hash_type *type, int size)
tbl->num_entries = 0;
tbl->num_bins = size;
tbl->bins = (st_table_entry **)Calloc(size, sizeof(st_table_entry*));
tbl->head = 0;
return tbl;
}
@ -198,19 +200,27 @@ st_init_strtable_with_size(int size)
}
void
st_free_table(st_table *table)
st_clear(st_table *table)
{
register st_table_entry *ptr, *next;
int i;
for(i = 0; i < table->num_bins; i++) {
ptr = table->bins[i];
table->bins[i] = 0;
while (ptr != 0) {
next = ptr->next;
free(ptr);
ptr = next;
}
}
table->head = 0;
}
void
st_free_table(st_table *table)
{
st_clear(table);
free(table->bins);
free(table);
}
@ -256,7 +266,7 @@ st_lookup(st_table *table, register st_data_t key, st_data_t *value)
#define ADD_DIRECT(table, key, value, hash_val, bin_pos)\
do {\
st_table_entry *entry;\
st_table_entry *entry, *head;\
if (table->num_entries/(table->num_bins) > ST_DEFAULT_MAX_DENSITY) {\
rehash(table);\
bin_pos = hash_val % table->num_bins;\
@ -268,6 +278,14 @@ do {\
entry->key = key;\
entry->record = value;\
entry->next = table->bins[bin_pos];\
if ((head = table->head) != 0) {\
entry->fore = head;\
(entry->back = head->back)->fore = entry;\
head->back = entry;\
}\
else {\
table->head = entry->fore = entry->back = entry;\
}\
table->bins[bin_pos] = entry;\
table->num_entries++;\
} while (0)
@ -305,33 +323,32 @@ static void
rehash(register st_table *table)
{
register st_table_entry *ptr, *next, **new_bins;
int i, old_num_bins = table->num_bins, new_num_bins;
int i, new_num_bins;
unsigned int hash_val;
new_num_bins = new_size(old_num_bins+1);
new_bins = (st_table_entry**)Calloc(new_num_bins, sizeof(st_table_entry*));
new_num_bins = new_size(table->num_bins+1);
new_bins = (st_table_entry**)
xrealloc(table->bins, new_num_bins * sizeof(st_table_entry*));
for (i = 0; i < new_num_bins; ++i) new_bins[i] = 0;
table->num_bins = new_num_bins;
table->bins = new_bins;
for(i = 0; i < old_num_bins; i++) {
ptr = table->bins[i];
while (ptr != 0) {
next = ptr->next;
if (ptr = table->head) {
do {
hash_val = ptr->hash % new_num_bins;
ptr->next = new_bins[hash_val];
new_bins[hash_val] = ptr;
ptr = next;
}
} while ((ptr = ptr->fore) != table->head);
}
free(table->bins);
table->num_bins = new_num_bins;
table->bins = new_bins;
}
st_table*
st_copy(st_table *old_table)
{
st_table *new_table;
st_table_entry *ptr, *entry;
int i, num_bins = old_table->num_bins;
st_table_entry *ptr, *entry, *prev, **tail;
int num_bins = old_table->num_bins;
unsigned int hash_val;
new_table = alloc(st_table);
if (new_table == 0) {
@ -347,61 +364,66 @@ st_copy(st_table *old_table)
return 0;
}
for(i = 0; i < num_bins; i++) {
new_table->bins[i] = 0;
ptr = old_table->bins[i];
while (ptr != 0) {
if ((ptr = old_table->head) != 0) {
prev = 0;
tail = &new_table->head;
do {
entry = alloc(st_table_entry);
if (entry == 0) {
free(new_table->bins);
free(new_table);
st_free_table(new_table);
return 0;
}
*entry = *ptr;
entry->next = new_table->bins[i];
new_table->bins[i] = entry;
ptr = ptr->next;
}
hash_val = entry->hash % num_bins;
entry->next = new_table->bins[hash_val];
new_table->bins[hash_val] = entry;
entry->back = prev;
*tail = prev = entry;
tail = &entry->fore;
} while ((ptr = ptr->fore) != old_table->head);
entry = new_table->head;
entry->back = prev;
*tail = entry;
}
return new_table;
}
#define REMOVE_ENTRY(table, ptr) do \
{ \
if (ptr == ptr->fore) { \
table->head = 0; \
} \
else { \
st_table_entry *fore = ptr->fore, *back = ptr->back; \
fore->back = back; \
back->fore = fore; \
if (ptr == table->head) table->head = fore; \
} \
table->num_entries--; \
} while (0)
int
st_delete(register st_table *table, register st_data_t *key, st_data_t *value)
{
unsigned int hash_val;
st_table_entry *tmp;
st_table_entry **prev;
register st_table_entry *ptr;
hash_val = do_hash_bin(*key, table);
ptr = table->bins[hash_val];
if (ptr == 0) {
if (value != 0) *value = 0;
return 0;
}
if (EQUAL(table, *key, ptr->key)) {
table->bins[hash_val] = ptr->next;
table->num_entries--;
if (value != 0) *value = ptr->record;
*key = ptr->key;
free(ptr);
return 1;
}
for(; ptr->next != 0; ptr = ptr->next) {
if (EQUAL(table, ptr->next->key, *key)) {
tmp = ptr->next;
ptr->next = ptr->next->next;
table->num_entries--;
if (value != 0) *value = tmp->record;
*key = tmp->key;
free(tmp);
for (prev = &table->bins[hash_val]; (ptr = *prev) != 0; prev = &ptr->next) {
if (EQUAL(table, *key, ptr->key)) {
*prev = ptr->next;
REMOVE_ENTRY(table, ptr);
if (value != 0) *value = ptr->record;
*key = ptr->key;
free(ptr);
return 1;
}
}
if (value != 0) *value = 0;
return 0;
}
@ -414,14 +436,9 @@ st_delete_safe(register st_table *table, register st_data_t *key, st_data_t *val
hash_val = do_hash_bin(*key, table);
ptr = table->bins[hash_val];
if (ptr == 0) {
if (value != 0) *value = 0;
return 0;
}
for(; ptr != 0; ptr = ptr->next) {
for (; ptr != 0; ptr = ptr->next) {
if ((ptr->key != never) && EQUAL(table, ptr->key, *key)) {
table->num_entries--;
REMOVE_ENTRY(table, ptr);
*key = ptr->key;
if (value != 0) *value = ptr->record;
ptr->key = ptr->record = never;
@ -429,68 +446,122 @@ st_delete_safe(register st_table *table, register st_data_t *key, st_data_t *val
}
}
if (value != 0) *value = 0;
return 0;
}
static int
delete_never(st_data_t key, st_data_t value, st_data_t never)
{
if (value == never) return ST_DELETE;
return ST_CONTINUE;
}
void
st_cleanup_safe(st_table *table, st_data_t never)
{
int num_entries = table->num_entries;
st_table_entry *ptr, **last, *tmp;
int i;
st_foreach(table, delete_never, never);
table->num_entries = num_entries;
for (i = 0; i < table->num_bins; i++) {
ptr = *(last = &table->bins[i]);
while (ptr != 0) {
if (ptr->key == never) {
tmp = ptr;
*last = ptr = ptr->next;
free(tmp);
}
else {
ptr = *(last = &ptr->next);
}
}
}
}
int
st_foreach(st_table *table, int (*func)(ANYARGS), st_data_t arg)
{
st_table_entry *ptr, *last, *tmp;
st_table_entry *ptr, **last, *tmp;
enum st_retval retval;
int i;
int i, end;
for(i = 0; i < table->num_bins; i++) {
last = 0;
for(ptr = table->bins[i]; ptr != 0;) {
if ((ptr = table->head) != 0) {
do {
end = ptr->fore == table->head;
retval = (*func)(ptr->key, ptr->record, arg);
switch (retval) {
case ST_CHECK: /* check if hash is modified during iteration */
tmp = 0;
if (i < table->num_bins) {
for (tmp = table->bins[i]; tmp; tmp=tmp->next) {
if (tmp == ptr) break;
case ST_CHECK: /* check if hash is modified during iteration */
i = ptr->hash % table->num_bins;
for (tmp = table->bins[i]; tmp != ptr; tmp = tmp->next) {
if (!tmp) {
/* call func with error notice */
retval = (*func)(0, 0, arg, 1);
return 1;
}
}
if (!tmp) {
/* call func with error notice */
return 1;
/* fall through */
case ST_CONTINUE:
ptr = ptr->fore;
break;
case ST_STOP:
return 0;
case ST_DELETE:
last = &table->bins[ptr->hash % table->num_bins];
for (; (tmp = *last) != 0; last = &tmp->next) {
if (ptr == tmp) {
tmp = ptr->fore;
*last = ptr->next;
REMOVE_ENTRY(table, ptr);
free(ptr);
if (ptr == tmp) return 0;
ptr = tmp;
break;
}
}
}
} while (!end && table->head);
}
return 0;
}
int
st_reverse_foreach(st_table *table, int (*func)(ANYARGS), st_data_t arg)
{
st_table_entry *ptr, **last, *tmp;
enum st_retval retval;
int i, end;
if ((ptr = table->head) != 0) {
ptr = ptr->back;
do {
end = ptr == table->head;
retval = (*func)(ptr->key, ptr->record, arg, 0);
switch (retval) {
case ST_CHECK: /* check if hash is modified during iteration */
i = ptr->hash % table->num_bins;
for (tmp = table->bins[i]; tmp != ptr; tmp = tmp->next) {
if (!tmp) {
/* call func with error notice */
retval = (*func)(0, 0, arg, 1);
return 1;
}
}
/* fall through */
case ST_CONTINUE:
last = ptr;
ptr = ptr->next;
case ST_CONTINUE:
ptr = ptr->back;
break;
case ST_STOP:
return 0;
case ST_DELETE:
tmp = ptr;
if (last == 0) {
table->bins[i] = ptr->next;
}
else {
last->next = ptr->next;
case ST_STOP:
return 0;
case ST_DELETE:
last = &table->bins[ptr->hash % table->num_bins];
for (; (tmp = *last) != 0; last = &tmp->next) {
if (ptr == tmp) {
tmp = ptr->back;
*last = ptr->next;
REMOVE_ENTRY(table, ptr);
free(ptr);
ptr = tmp;
break;
}
}
ptr = ptr->next;
free(tmp);
table->num_entries--;
}
}
} while (!end && table->head);
}
return 0;
}