bool
CFReader_Local_Delete_IMP(CompoundFileReader *self, String *name) {
CompoundFileReaderIVARS *const ivars = CFReader_IVARS(self);
Hash *record = (Hash*)Hash_Delete(ivars->records, name);
DECREF(record);
if (record == NULL) {
return Folder_Local_Delete(ivars->real_folder, name);
}
else {
// Once the number of virtual files falls to 0, remove the compound
// files.
if (Hash_Get_Size(ivars->records) == 0) {
String *cf_file = (String*)SSTR_WRAP_UTF8("cf.dat", 6);
if (!Folder_Delete(ivars->real_folder, cf_file)) {
return false;
}
String *cfmeta_file = (String*)SSTR_WRAP_UTF8("cfmeta.json", 11);
if (!Folder_Delete(ivars->real_folder, cfmeta_file)) {
return false;
}
}
return true;
}
}
static void
Layer_Remove(int victim)
{
LayerPtr layer = (LayerPtr)Hash_Delete(layer_hash, victim);
int index;
Widget temp;
int i;
for ( index = 0 ; layer_list_map[index] != victim ; index++ );
free(layer->instances);
free(layer->name);
free(layer);
temp = layer_toggles[index];
XtUnmanageChild(temp);
for ( i = index + 1; i < num_layers ; i++ )
{
layer_name_list[i-1] = layer_name_list[i];
layer_list_map[i-1] = layer_list_map[i];
layer_toggles[i-1] = layer_toggles[i];
}
num_layers--;
layer_toggles[num_layers] = temp;
XawListChange(layer_list_widget, layer_name_list, num_layers, 0, TRUE);
}
bool_t
CFReader_local_delete(CompoundFileReader *self, const CharBuf *name) {
Hash *record = (Hash*)Hash_Delete(self->records, (Obj*)name);
DECREF(record);
if (record == NULL) {
return Folder_Local_Delete(self->real_folder, name);
}
else {
// Once the number of virtual files falls to 0, remove the compound
// files.
if (Hash_Get_Size(self->records) == 0) {
CharBuf *cf_file = (CharBuf*)ZCB_WRAP_STR("cf.dat", 6);
if (!Folder_Delete(self->real_folder, cf_file)) {
return false;
}
CharBuf *cfmeta_file = (CharBuf*)ZCB_WRAP_STR("cfmeta.json", 11);
if (!Folder_Delete(self->real_folder, cfmeta_file)) {
return false;
}
}
return true;
}
}
bool_t
RAMFolder_local_delete(RAMFolder *self, const CharBuf *name)
{
Obj *entry = Hash_Fetch(self->entries, (Obj*)name);
if (entry) {
if (Obj_Is_A(entry, RAMFILE)) {
;
}
else if (Obj_Is_A(entry, FOLDER)) {
RAMFolder *inner_folder;
if (Obj_Is_A(entry, COMPOUNDFILEREADER)) {
inner_folder = (RAMFolder*)CERTIFY(
CFReader_Get_Real_Folder((CompoundFileReader*)entry),
RAMFOLDER);
}
else {
inner_folder = (RAMFolder*)CERTIFY(entry, RAMFOLDER);
}
if (Hash_Get_Size(inner_folder->entries)) {
// Can't delete non-empty dir.
return false;
}
}
else {
return false;
}
DECREF(Hash_Delete(self->entries, (Obj*)name));
return true;
}
else {
return false;
}
}
bool_t
RAMFolder_delete(RAMFolder *self, const CharBuf *filepath)
{
RAMFileDes *file_des
= (RAMFileDes*)Hash_Delete(self->elems, filepath);
if (file_des) { RAMFileDes_Dec_RefCount(file_des); }
return !!file_des;
}
/* Gets the best node from OpenList
* returns the best node, or NULL of none is found
* Also it deletes the node from the OpenList */
static OpenListNode *AyStarMain_OpenList_Pop(AyStar *aystar)
{
/* Return the item the Queue returns.. the best next OpenList item. */
OpenListNode *res = (OpenListNode*)aystar->OpenListQueue.pop(&aystar->OpenListQueue);
if (res != NULL) {
Hash_Delete(&aystar->OpenListHash, res->path.node.tile, res->path.node.direction);
}
return res;
}
bool_t
Snapshot_delete_entry(Snapshot *self, const CharBuf *entry)
{
Obj *val = Hash_Delete(self->entries, entry);
if (val) {
Obj_Dec_RefCount(val);
return true;
}
else {
return false;
}
}
bool
Snapshot_Delete_Entry_IMP(Snapshot *self, String *entry) {
SnapshotIVARS *const ivars = Snapshot_IVARS(self);
Obj *val = Hash_Delete(ivars->entries, entry);
if (val) {
DECREF(val);
return true;
}
else {
return false;
}
}
void
RAMFolder_rename(RAMFolder *self, const CharBuf* from, const CharBuf *to)
{
RAMFileDes *file_des = (RAMFileDes*)Hash_Delete(self->elems, from);
if (file_des == NULL) {
THROW("File '%o' not loaded into RAM", from);
}
Hash_Store(self->elems, to, (Obj*)file_des);
FileDes_Set_Path(file_des, to);
}
bool
FSFolder_Local_Delete_IMP(FSFolder *self, String *name) {
FSFolderIVARS *const ivars = FSFolder_IVARS(self);
char *path_ptr = S_fullpath_ptr(self, name);
#ifdef CHY_REMOVE_ZAPS_DIRS
bool result = !remove(path_ptr);
#else
bool result = !rmdir(path_ptr) || !remove(path_ptr);
#endif
DECREF(Hash_Delete(ivars->entries, (Obj*)name));
FREEMEM(path_ptr);
return result;
}
void* thread_code(void *arg)
{
struct hash_job_desc *jd = (struct hash_job_desc *) arg;
int numOfOps = NUM_OPS_PER_THREAD;
int i = 0;
int *addlist = malloc(sizeof(int) * numOfOps);
if (addlist == NULL) {
printf(" cannot allocate more ..., reduce space \n");
exit(-1);
}
while (i < numOfOps) {
// addlist[i] = rand() % (numOfOps * num_threads);
// since key is unique...
addlist[i] = i + (numOfOps * jd->tid);
Hash_Insert(&h, addlist + i, addlist[i]);
(jd->ic)++;
i++;
}
i = 0;
while (i < numOfOps) {
if (i % 3 == 0) {
Hash_Delete(&h, addlist[i]);
(jd->dc)++;
}
i++;
}
i = 0;
while (i < numOfOps) {
if (Hash_Lookup(&h, addlist[i]) != NULL)
(jd->lc)++;
i++;
}
// printf(" END Thread-%04d with %6d ic, %6d dc, %6d lc\n",
// jd->tid, jd->ic, jd->dc, jd->lc);
free(addlist);
return NULL;
}
int main ()
{
FILE* the_table = fopen ("the_table.csv", "w");
FILE* the_text = fopen ("the_text.txt", "r");
assert (the_log);
assert (the_table);
assert (the_text);
hash* the_hash = Hash_NEW();
assert (the_hash);
char word[MAXLEN] = {};
int nWords = 0;
typedef unsigned int (*hash_funcs) (const char* my_key);
hash_funcs hf[5] = {hf0, hf1, hf2, hf3, hf4};
int func_num = 0;
char text_description[2 * MAXLEN] = {};
strcpy (text_description, "Bradbury's novel \"Fahrenheit 451\"");
OUT printf ("# This program allows to use hash-functions for sorting\n"
"# words in %s\n"
"# The developer: Yura Gorishniy <*****@*****.**>\n"
"# Version 1.00\n"
"# The file: %s\n"
"# The compilation time: %s, %s\n\n", text_description, strrchr (__FILE__, '\\'), __DATE__, __TIME__);
printf ("# You can use 5 hash-functions to analyse the novel:\n"
"# Function [1] hash = 0\n"
"# Function [2] hash = the ASCII code of the first letter of the word\n"
"# Function [3] hash = the sum of ASCII codes of all letters of the word\n"
"# Function [4] hash = the average ASCII code of all letters of the word\n"
"# Function [5] hash = the number, which we get after right cyclic shift\n"
"# P.S. All the hashes you get will be counted by module %d\n\n", HASH_SIZE);
printf ("# Please, enter number of the function you want to use\n");
if (!scanf ("%d", &func_num))
{
printf ("Incorrect input, try again\n");
abort ();
}
if (!(1 <= func_num && func_num <= 5))
{
printf ("Incorrect input, try again\n");
abort ();
}
the_hash -> func = hf[func_num - 1];
while (1)
{
if (get_word (the_text, word) == 0) break;
nWords++;
int hash = the_hash -> func (word) % the_hash -> size;
elem* new_elem = NULL;
List_Elem_Find_Key (the_hash -> table[hash], word, &new_elem);
if (!new_elem) List_Elem_Add (the_hash -> table[hash], word, 1);
}
for (int i = 0; i < HASH_SIZE; ++i) fprintf (the_table, "%d\n", the_hash -> table[i] -> length);
Hash_Dump (the_hash);
Hash_Delete (the_hash);
fclose (the_text);
fclose (the_table);
fclose (the_log);
printf ("\nThe job is done! \nYou can use the_table.csv in Microsoft Excel to get a nice diagram\nGoodbye!\n\n");
return 0;
}
static void
test_Store_and_Fetch(TestBatch *batch) {
Hash *hash = Hash_new(100);
Hash *dupe = Hash_new(100);
const uint32_t starting_cap = Hash_Get_Capacity(hash);
VArray *expected = VA_new(100);
VArray *got = VA_new(100);
ZombieCharBuf *twenty = ZCB_WRAP_STR("20", 2);
ZombieCharBuf *forty = ZCB_WRAP_STR("40", 2);
ZombieCharBuf *foo = ZCB_WRAP_STR("foo", 3);
for (int32_t i = 0; i < 100; i++) {
CharBuf *cb = CB_newf("%i32", i);
Hash_Store(hash, (Obj*)cb, (Obj*)cb);
Hash_Store(dupe, (Obj*)cb, INCREF(cb));
VA_Push(expected, INCREF(cb));
}
TEST_TRUE(batch, Hash_Equals(hash, (Obj*)dupe), "Equals");
TEST_INT_EQ(batch, Hash_Get_Capacity(hash), starting_cap,
"Initial capacity sufficient (no rebuilds)");
for (int32_t i = 0; i < 100; i++) {
Obj *key = VA_Fetch(expected, i);
Obj *elem = Hash_Fetch(hash, key);
VA_Push(got, (Obj*)INCREF(elem));
}
TEST_TRUE(batch, VA_Equals(got, (Obj*)expected),
"basic Store and Fetch");
TEST_INT_EQ(batch, Hash_Get_Size(hash), 100,
"size incremented properly by Hash_Store");
TEST_TRUE(batch, Hash_Fetch(hash, (Obj*)foo) == NULL,
"Fetch against non-existent key returns NULL");
Hash_Store(hash, (Obj*)forty, INCREF(foo));
TEST_TRUE(batch, ZCB_Equals(foo, Hash_Fetch(hash, (Obj*)forty)),
"Hash_Store replaces existing value");
TEST_FALSE(batch, Hash_Equals(hash, (Obj*)dupe),
"replacement value spoils equals");
TEST_INT_EQ(batch, Hash_Get_Size(hash), 100,
"size unaffected after value replaced");
TEST_TRUE(batch, Hash_Delete(hash, (Obj*)forty) == (Obj*)foo,
"Delete returns value");
DECREF(foo);
TEST_INT_EQ(batch, Hash_Get_Size(hash), 99,
"size decremented by successful Delete");
TEST_TRUE(batch, Hash_Delete(hash, (Obj*)forty) == NULL,
"Delete returns NULL when key not found");
TEST_INT_EQ(batch, Hash_Get_Size(hash), 99,
"size not decremented by unsuccessful Delete");
DECREF(Hash_Delete(dupe, (Obj*)forty));
TEST_TRUE(batch, VA_Equals(got, (Obj*)expected), "Equals after Delete");
Hash_Clear(hash);
TEST_TRUE(batch, Hash_Fetch(hash, (Obj*)twenty) == NULL, "Clear");
TEST_TRUE(batch, Hash_Get_Size(hash) == 0, "size is 0 after Clear");
DECREF(hash);
DECREF(dupe);
DECREF(got);
DECREF(expected);
}
int main()
{
pthread_t thread[3];
counter_t counter;
printf("Testing Counter...\n");
printf("Begin single thread test\n");
printf("Counter Init\n");
Counter_Init(&counter, 0);
printf("Counter_GetValue\n");
int counter_val = Counter_GetValue(&counter);
printf("expected 0 got %d\n", counter_val);
printf("Counter_Increment\n");
Counter_Increment(&counter);
counter_val = counter_val = Counter_GetValue(&counter);
printf("expected 1 got %d\n", counter_val);
printf("Counter_Decrement\n");
Counter_Decrement(&counter);
counter_val = Counter_GetValue(&counter);
printf("expected 0 got %d\n", counter_val);
printf("Begin multithreaded test\n");
printf("Counter Init\n");
Counter_Init(&counter, 0);
pthread_create(&thread[0], NULL, Counter_Increment, (void*)&counter);
printf("Counter is at %d after 1 increment call\n", Counter_GetValue(&counter));
pthread_create(&thread[1], NULL, Counter_Increment, (void*)&counter);
printf("Counter is at %d after 2 increment calls\n", Counter_GetValue(&counter));
pthread_create(&thread[2], NULL, Counter_Increment, (void*)&counter);
printf("Counter is at %d after 3 increment calls\n", Counter_GetValue(&counter));
pthread_join(thread[0], NULL);
pthread_join(thread[1], NULL);
pthread_join(thread[2], NULL);
printf("Count after 3 threads = %d\n", Counter_GetValue(&counter));
printf("Done Testing Counter\n\n");
list_insert_arg insert_arg[3];
list_lookup_arg lookup_arg[3];
list_t list;
printf("Testing list...\n");
printf("Begin single-thread test\n");
printf("List_Init()\n");
List_Init(&list);
printf("List_Insert()\n");
List_Insert(&list, (void *)0x1, 1);
List_Insert(&list, (void *)0x2, 2);
List_Insert(&list, (void *)0x3, 3);
printf("Expected %p got %p\n", (void *)0x1, List_Lookup(&list, 1));
printf("Expected %p got %p\n", (void *)0x3, List_Lookup(&list, 3));
printf("Expected %p got %p\n", (void *)0x2, List_Lookup(&list, 2));
printf("List_Delete()\n");
List_Delete(&list, 1);
printf("Expected %p got %p\n", (void *)0x2, List_Lookup(&list, 2));
printf("Expected %p got %p\n", (void *)0x3, List_Lookup(&list, 3));
printf("Expected %p got %p\n", NULL, List_Lookup(&list, 1));
printf("Single-thread test completed\n");
printf("Begin multi-thread test\n");
printf("List_Init()\n");
List_Init(&list);
printf("Parallel List_Insert()\n");
insert_arg[0].list = &list;
insert_arg[0].element = (void *)0x1;
insert_arg[0].key = 1;
pthread_create(&thread[0], NULL, pthread_list_insert, &insert_arg[0]);
insert_arg[1].list = &list;
insert_arg[1].element = (void *)0x2;
insert_arg[1].key = 2;
pthread_create(&thread[1], NULL, pthread_list_insert, &insert_arg[1]);
insert_arg[2].list = &list;
insert_arg[2].element = (void *)0x3;
insert_arg[2].key = 3;
pthread_create(&thread[2], NULL, pthread_list_insert, &insert_arg[2]);
pthread_join(thread[0], NULL);
pthread_join(thread[1], NULL);
pthread_join(thread[2], NULL);
printf("Parallel List_Insert() completed\n");
printf("Parallel List_Lookup()\n");
lookup_arg[0].list = &list;
lookup_arg[0].key = 1;
pthread_create(&thread[0], NULL, pthread_list_lookup, &lookup_arg[0]);
lookup_arg[1].list = &list;
lookup_arg[1].key = 2;
pthread_create(&thread[1], NULL, pthread_list_lookup, &lookup_arg[1]);
lookup_arg[2].list = &list;
lookup_arg[2].key = 3;
pthread_create(&thread[2], NULL, pthread_list_lookup, &lookup_arg[2]);
pthread_join(thread[0], NULL);
pthread_join(thread[1], NULL);
pthread_join(thread[2], NULL);
printf("Parallel List_Lookup() completed\n");
printf("List_Delete()\n");
List_Delete(&list, 1);
printf("Expected %p got %p\n", (void *)0x2, List_Lookup(&list, 2));
printf("Expected %p got %p\n", (void *)0x3, List_Lookup(&list, 3));
printf("Expected %p got %p\n", NULL, List_Lookup(&list, 1));
printf("Multi-thread test completed\n");
printf("Done testing list\n\n");
hash_t hash;
printf("Testing hash...\n");
printf("Begin single-thread test\n");
printf("Hash_Init()\n");
Hash_Init(&hash, 2);
printf("Hash_Insert()\n");
Hash_Insert(&hash, (void *)0x1, 1);
Hash_Insert(&hash, (void *)0x2, 2);
Hash_Insert(&hash, (void *)0x3, 3);
printf("Hash_Lookup()\n");
printf("Expected %p got %p\n", (void *)0x2, Hash_Lookup(&hash, 2));
printf("Expected %p got %p\n", (void *)0x3, Hash_Lookup(&hash, 3));
printf("Expected %p got %p\n", (void *)0x1, Hash_Lookup(&hash, 1));
printf("Hash_Delete()\n");
Hash_Delete(&hash, 1);
printf("Hash_Lookup()\n");
printf("Expected %p got %p\n", (void *)0x2, Hash_Lookup(&hash, 2));
printf("Expected %p got %p\n", (void *)0x3, Hash_Lookup(&hash, 3));
printf("Expected %p got %p\n", NULL, Hash_Lookup(&hash, 1));
printf("Single-thread test completed\n");
printf("Done testing hash...\n");
return 0;
}
static bool_t
S_rename_or_hard_link(RAMFolder *self, const CharBuf* from, const CharBuf *to,
Folder *from_folder, Folder *to_folder,
ZombieCharBuf *from_name, ZombieCharBuf *to_name,
int op)
{
Obj *elem = NULL;
RAMFolder *inner_from_folder = NULL;
RAMFolder *inner_to_folder = NULL;
UNUSED_VAR(self);
// Make sure the source and destination folders exist.
if (!from_folder) {
Err_set_error(Err_new(CB_newf("File not found: '%o'", from)));
return false;
}
if (!to_folder) {
Err_set_error(Err_new(CB_newf(
"Invalid file path (can't find dir): '%o'", to)));
return false;
}
// Extract RAMFolders from compound reader wrappers, if necessary.
if (Folder_Is_A(from_folder, COMPOUNDFILEREADER)) {
inner_from_folder = (RAMFolder*)CFReader_Get_Real_Folder(
(CompoundFileReader*)from_folder);
}
else {
inner_from_folder = (RAMFolder*)from_folder;
}
if (Folder_Is_A(to_folder, COMPOUNDFILEREADER)) {
inner_to_folder = (RAMFolder*)CFReader_Get_Real_Folder(
(CompoundFileReader*)to_folder);
}
else {
inner_to_folder = (RAMFolder*)to_folder;
}
if (!RAMFolder_Is_A(inner_from_folder, RAMFOLDER)) {
Err_set_error(Err_new(CB_newf("Not a RAMFolder, but a '%o'",
Obj_Get_Class_Name((Obj*)inner_from_folder))));
return false;
}
if (!RAMFolder_Is_A(inner_to_folder, RAMFOLDER)) {
Err_set_error(Err_new(CB_newf("Not a RAMFolder, but a '%o'",
Obj_Get_Class_Name((Obj*)inner_to_folder))));
return false;
}
// Find the original element.
elem = Hash_Fetch(inner_from_folder->entries, (Obj*)from_name);
if (!elem) {
if ( Folder_Is_A(from_folder, COMPOUNDFILEREADER)
&& Folder_Local_Exists(from_folder, (CharBuf*)from_name)
) {
Err_set_error(Err_new(CB_newf("Source file '%o' is virtual",
from)));
}
else {
Err_set_error(Err_new(CB_newf("File not found: '%o'", from)));
}
return false;
}
// Execute the rename/hard-link.
if (op == OP_RENAME) {
Obj *existing = Hash_Fetch(inner_to_folder->entries, (Obj*)to_name);
if (existing) {
bool_t conflict = false;
// Return success fast if file is copied on top of itself.
if ( inner_from_folder == inner_to_folder
&& ZCB_Equals(from_name, (Obj*)to_name)
) {
return true;
}
// Don't allow clobbering of different entry type.
if (Obj_Is_A(elem, RAMFILE)) {
if (!Obj_Is_A(existing, RAMFILE)) {
conflict = true;
}
}
else if (Obj_Is_A(elem, FOLDER)) {
if (!Obj_Is_A(existing, FOLDER)) {
conflict = true;
}
}
if (conflict) {
Err_set_error(Err_new(CB_newf("Can't clobber a %o with a %o",
Obj_Get_Class_Name(existing), Obj_Get_Class_Name(elem))));
return false;
}
}
// Perform the store first, then the delete. Inform Folder objects
// about the relocation.
Hash_Store(inner_to_folder->entries, (Obj*)to_name, INCREF(elem));
DECREF(Hash_Delete(inner_from_folder->entries, (Obj*)from_name));
if (Obj_Is_A(elem, FOLDER)) {
CharBuf *newpath = S_fullpath(inner_to_folder, (CharBuf*)to_name);
Folder_Set_Path((Folder*)elem, newpath);
DECREF(newpath);
}
}
else if (op == OP_HARD_LINK) {
if (!Obj_Is_A(elem, RAMFILE)) {
Err_set_error(Err_new(CB_newf("'%o' isn't a file, it's a %o",
from, Obj_Get_Class_Name(elem))));
return false;
}
else {
Obj *existing
= Hash_Fetch(inner_to_folder->entries, (Obj*)to_name);
if (existing) {
Err_set_error(Err_new(CB_newf("'%o' already exists", to)));
return false;
}
else {
Hash_Store(inner_to_folder->entries, (Obj*)to_name,
INCREF(elem));
}
}
}
else {
THROW(ERR, "Unexpected op: %i32", (int32_t)op);
}
return true;
}
CompoundFileReader*
CFReader_do_open(CompoundFileReader *self, Folder *folder) {
CharBuf *cfmeta_file = (CharBuf*)ZCB_WRAP_STR("cfmeta.json", 11);
Hash *metadata = (Hash*)Json_slurp_json((Folder*)folder, cfmeta_file);
Err *error = NULL;
Folder_init((Folder*)self, Folder_Get_Path(folder));
// Parse metadata file.
if (!metadata || !Hash_Is_A(metadata, HASH)) {
error = Err_new(CB_newf("Can't read '%o' in '%o'", cfmeta_file,
Folder_Get_Path(folder)));
}
else {
Obj *format = Hash_Fetch_Str(metadata, "format", 6);
self->format = format ? (int32_t)Obj_To_I64(format) : 0;
self->records = (Hash*)INCREF(Hash_Fetch_Str(metadata, "files", 5));
if (self->format < 1) {
error = Err_new(CB_newf("Corrupt %o file: Missing or invalid 'format'",
cfmeta_file));
}
else if (self->format > CFWriter_current_file_format) {
error = Err_new(CB_newf("Unsupported compound file format: %i32 "
"(current = %i32", self->format,
CFWriter_current_file_format));
}
else if (!self->records) {
error = Err_new(CB_newf("Corrupt %o file: missing 'files' key",
cfmeta_file));
}
}
DECREF(metadata);
if (error) {
Err_set_error(error);
DECREF(self);
return NULL;
}
// Open an instream which we'll clone over and over.
CharBuf *cf_file = (CharBuf*)ZCB_WRAP_STR("cf.dat", 6);
self->instream = Folder_Open_In(folder, cf_file);
if (!self->instream) {
ERR_ADD_FRAME(Err_get_error());
DECREF(self);
return NULL;
}
// Assign.
self->real_folder = (Folder*)INCREF(folder);
// Strip directory name from filepaths for old format.
if (self->format == 1) {
VArray *files = Hash_Keys(self->records);
ZombieCharBuf *filename = ZCB_BLANK();
ZombieCharBuf *folder_name
= IxFileNames_local_part(Folder_Get_Path(folder), ZCB_BLANK());
size_t folder_name_len = ZCB_Length(folder_name);
for (uint32_t i = 0, max = VA_Get_Size(files); i < max; i++) {
CharBuf *orig = (CharBuf*)VA_Fetch(files, i);
if (CB_Starts_With(orig, (CharBuf*)folder_name)) {
Obj *record = Hash_Delete(self->records, (Obj*)orig);
ZCB_Assign(filename, orig);
ZCB_Nip(filename, folder_name_len + sizeof(DIR_SEP) - 1);
Hash_Store(self->records, (Obj*)filename, (Obj*)record);
}
}
DECREF(files);
}
return self;
}
static void
S_discover_unused(FilePurger *self, VArray **purgables_ptr,
VArray **snapshots_ptr)
{
Folder *folder = self->folder;
DirHandle *dh = Folder_Open_Dir(folder, NULL);
if (!dh) { RETHROW(INCREF(Err_get_error())); }
VArray *spared = VA_new(1);
VArray *snapshots = VA_new(1);
CharBuf *snapfile = NULL;
// Start off with the list of files in the current snapshot.
if (self->snapshot) {
VArray *entries = Snapshot_List(self->snapshot);
VArray *referenced = S_find_all_referenced(folder, entries);
VA_Push_VArray(spared, referenced);
DECREF(entries);
DECREF(referenced);
snapfile = Snapshot_Get_Path(self->snapshot);
if (snapfile) { VA_Push(spared, INCREF(snapfile)); }
}
CharBuf *entry = DH_Get_Entry(dh);
Hash *candidates = Hash_new(64);
while (DH_Next(dh)) {
if (!CB_Starts_With_Str(entry, "snapshot_", 9)) { continue; }
else if (!CB_Ends_With_Str(entry, ".json", 5)) { continue; }
else if (snapfile && CB_Equals(entry, (Obj*)snapfile)) { continue; }
else {
Snapshot *snapshot
= Snapshot_Read_File(Snapshot_new(), folder, entry);
Lock *lock
= IxManager_Make_Snapshot_Read_Lock(self->manager, entry);
VArray *snap_list = Snapshot_List(snapshot);
VArray *referenced = S_find_all_referenced(folder, snap_list);
// DON'T obtain the lock -- only see whether another
// entity holds a lock on the snapshot file.
if (lock) {
Lock_Clear_Stale(lock);
}
if (lock && Lock_Is_Locked(lock)) {
// The snapshot file is locked, which means someone's using
// that version of the index -- protect all of its entries.
uint32_t new_size = VA_Get_Size(spared)
+ VA_Get_Size(referenced) + 1;
VA_Grow(spared, new_size);
VA_Push(spared, (Obj*)CB_Clone(entry));
VA_Push_VArray(spared, referenced);
}
else {
// No one's using this snapshot, so all of its entries are
// candidates for deletion.
for (uint32_t i = 0, max = VA_Get_Size(referenced); i < max; i++) {
CharBuf *file = (CharBuf*)VA_Fetch(referenced, i);
Hash_Store(candidates, (Obj*)file, INCREF(&EMPTY));
}
VA_Push(snapshots, INCREF(snapshot));
}
DECREF(referenced);
DECREF(snap_list);
DECREF(snapshot);
DECREF(lock);
}
}
DECREF(dh);
// Clean up after a dead segment consolidation.
S_zap_dead_merge(self, candidates);
// Eliminate any current files from the list of files to be purged.
for (uint32_t i = 0, max = VA_Get_Size(spared); i < max; i++) {
CharBuf *filename = (CharBuf*)VA_Fetch(spared, i);
DECREF(Hash_Delete(candidates, (Obj*)filename));
}
// Pass back purgables and Snapshots.
*purgables_ptr = Hash_Keys(candidates);
*snapshots_ptr = snapshots;
DECREF(candidates);
DECREF(spared);
}
CompoundFileReader*
CFReader_do_open(CompoundFileReader *self, Folder *folder) {
CompoundFileReaderIVARS *const ivars = CFReader_IVARS(self);
String *cfmeta_file = (String*)SSTR_WRAP_UTF8("cfmeta.json", 11);
Hash *metadata = (Hash*)Json_slurp_json((Folder*)folder, cfmeta_file);
Err *error = NULL;
Folder_init((Folder*)self, Folder_Get_Path(folder));
// Parse metadata file.
if (!metadata || !Hash_Is_A(metadata, HASH)) {
error = Err_new(Str_newf("Can't read '%o' in '%o'", cfmeta_file,
Folder_Get_Path(folder)));
}
else {
Obj *format = Hash_Fetch_Utf8(metadata, "format", 6);
ivars->format = format ? (int32_t)Obj_To_I64(format) : 0;
ivars->records = (Hash*)INCREF(Hash_Fetch_Utf8(metadata, "files", 5));
if (ivars->format < 1) {
error = Err_new(Str_newf("Corrupt %o file: Missing or invalid 'format'",
cfmeta_file));
}
else if (ivars->format > CFWriter_current_file_format) {
error = Err_new(Str_newf("Unsupported compound file format: %i32 "
"(current = %i32", ivars->format,
CFWriter_current_file_format));
}
else if (!ivars->records) {
error = Err_new(Str_newf("Corrupt %o file: missing 'files' key",
cfmeta_file));
}
}
DECREF(metadata);
if (error) {
Err_set_error(error);
DECREF(self);
return NULL;
}
// Open an instream which we'll clone over and over.
String *cf_file = (String*)SSTR_WRAP_UTF8("cf.dat", 6);
ivars->instream = Folder_Open_In(folder, cf_file);
if (!ivars->instream) {
ERR_ADD_FRAME(Err_get_error());
DECREF(self);
return NULL;
}
// Assign.
ivars->real_folder = (Folder*)INCREF(folder);
// Strip directory name from filepaths for old format.
if (ivars->format == 1) {
Vector *files = Hash_Keys(ivars->records);
String *folder_name = IxFileNames_local_part(Folder_Get_Path(folder));
size_t folder_name_len = Str_Length(folder_name);
for (uint32_t i = 0, max = Vec_Get_Size(files); i < max; i++) {
String *orig = (String*)Vec_Fetch(files, i);
if (Str_Starts_With(orig, folder_name)) {
Obj *record = Hash_Delete(ivars->records, orig);
size_t offset = folder_name_len + sizeof(CHY_DIR_SEP) - 1;
size_t len = Str_Length(orig) - offset;
String *filename = Str_SubString(orig, offset, len);
Hash_Store(ivars->records, filename, (Obj*)record);
DECREF(filename);
}
}
DECREF(folder_name);
DECREF(files);
}
return self;
}
