sessionstorage.c
No OneTemporary
Actions

Size

4 KB

Referenced Files

None

Subscribers

None

sessionstorage.c
View Options

	#include <stdlib.h>
	#include <string.h>
	#include <uthash.h>

	#include "ant.h"
	#include "errors.h"
	#include "arena.h"
	#include "runtime.h"
	#include "internal.h"
	#include "descriptors.h"

	#include "modules/symbol.h"
	#include "modules/sessionstorage.h"

	typedef struct storage_entry {
	char *key;
	char *value;
	UT_hash_handle hh;
	} storage_entry_t;

	static storage_entry_t *session_storage = NULL;

	static void storage_set_item(const char key, size_t key_len, const char value, size_t value_len) {
	storage_entry_t *entry = NULL;

	HASH_FIND(hh, session_storage, key, key_len, entry);

	if (entry) {
	HASH_DEL(session_storage, entry);
	free(entry);
	}

	entry = ant_calloc(sizeof(storage_entry_t) + key_len + 1 + value_len + 1);
	if (!entry) return;

	entry->key = (char *)(entry + 1);
	entry->value = entry->key + key_len + 1;

	memcpy(entry->key, key, key_len);
	entry->key[key_len] = '\0';
	memcpy(entry->value, value, value_len);
	entry->value[value_len] = '\0';

	HASH_ADD_KEYPTR(hh, session_storage, entry->key, key_len, entry);
	}

	static char storage_get_item(const char key, size_t key_len) {
	storage_entry_t *entry = NULL;
	HASH_FIND(hh, session_storage, key, key_len, entry);
	return entry ? entry->value : NULL;
	}

	static void storage_remove_item(const char *key, size_t key_len) {
	storage_entry_t *entry = NULL;
	HASH_FIND(hh, session_storage, key, key_len, entry);

	if (entry) {
	HASH_DEL(session_storage, entry);
	free(entry);
	}
	}

	static void storage_clear(void) {
	storage_entry_t entry, tmp;
	HASH_ITER(hh, session_storage, entry, tmp) {
	HASH_DEL(session_storage, entry);
	free(entry);
	}
	}

	static size_t storage_length(void) {
	return HASH_COUNT(session_storage);
	}

	static char *storage_key(size_t index) {
	storage_entry_t *entry;
	size_t i = 0;

	for (entry = session_storage; entry != NULL; entry = entry->hh.next) {
	if (i == index) return entry->key;
	i++;
	}

	return NULL;
	}

	// sessionStorage.setItem(key, value)
	static jsval_t js_sessionstorage_setItem(ant_t js, jsval_t args, int nargs) {
	if (nargs < 2) {
	return js_mkerr(js, "Failed to execute 'setItem' on 'Storage': 2 arguments required");
	}

	size_t key_len, value_len;
	char *key = js_getstr(js, args[0], &key_len);
	char *value = js_getstr(js, js_tostring_val(js, args[1]), &value_len);

	storage_set_item(key, key_len, value, value_len);

	return js_mkundef();
	}

	// sessionStorage.getItem(key)
	static jsval_t js_sessionstorage_getItem(ant_t js, jsval_t args, int nargs) {
	if (nargs < 1) {
	return js_mkerr(js, "Failed to execute 'getItem' on 'Storage': 1 argument required");
	}

	size_t key_len;
	char *key = js_getstr(js, args[0], &key_len);
	char *value = storage_get_item(key, key_len);

	if (!value) return js_mknull();

	return js_mkstr(js, value, strlen(value));
	}

	// sessionStorage.removeItem(key)
	static jsval_t js_sessionstorage_removeItem(ant_t js, jsval_t args, int nargs) {
	if (nargs < 1) {
	return js_mkerr(js, "Failed to execute 'removeItem' on 'Storage': 1 argument required");
	}

	size_t key_len;
	char *key = js_getstr(js, args[0], &key_len);
	storage_remove_item(key, key_len);

	return js_mkundef();
	}

	// sessionStorage.clear()
	static jsval_t js_sessionstorage_clear(ant_t js, jsval_t args, int nargs) {
	(void)js; (void)args; (void)nargs;
	storage_clear();
	return js_mkundef();
	}

	// sessionStorage.key(index)
	static jsval_t js_sessionstorage_key(ant_t js, jsval_t args, int nargs) {
	if (nargs < 1) {
	return js_mkerr(js, "Failed to execute 'key' on 'Storage': 1 argument required");
	}

	if (vtype(args[0]) != T_NUM) {
	return js_mknull();
	}

	double idx = js_getnum(args[0]);
	if (idx < 0) return js_mknull();

	size_t index = (size_t)idx;
	char *key = storage_key(index);

	if (!key) return js_mknull();

	return js_mkstr(js, key, strlen(key));
	}

	// sessionStorage.length
	static jsval_t js_sessionstorage_length(ant_t js, jsval_t args, int nargs) {
	(void)js; (void)args; (void)nargs;
	return js_mknum((double)storage_length());
	}

	void init_sessionstorage_module(void) {
	ant_t *js = rt->js;

	jsval_t glob = js_glob(js);
	jsval_t storage_obj = js_mkobj(js);

	js_set(js, storage_obj, "setItem", js_mkfun(js_sessionstorage_setItem));
	js_set(js, storage_obj, "getItem", js_mkfun(js_sessionstorage_getItem));
	js_set(js, storage_obj, "removeItem", js_mkfun(js_sessionstorage_removeItem));
	js_set(js, storage_obj, "clear", js_mkfun(js_sessionstorage_clear));
	js_set(js, storage_obj, "key", js_mkfun(js_sessionstorage_key));

	jsval_t length_getter = js_mkfun(js_sessionstorage_length);
	js_set_getter_desc(js, storage_obj, "length", 6, length_getter, JS_DESC_E);

	js_set_sym(js, storage_obj, get_toStringTag_sym(), ANT_STRING("Storage"));
	js_set(js, glob, "sessionStorage", storage_obj);
	}

File Metadata

Mime Type: text/x-c
Expires: Thu, Mar 26, 4:46 PM (2 d)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 511707
Default Alt Text: sessionstorage.c (4 KB)

sessionstorage.cNo OneTemporaryActions

sessionstorage.cView Options

File Metadata

Event Timeline

sessionstorage.c
No OneTemporary
Actions

sessionstorage.c
View Options