redisClient *createClient(int fd) {
redisClient *c = zmalloc(sizeof(redisClient));
/* passing -1 as fd it is possible to create a non connected client.
* This is useful since all the Redis commands needs to be executed
* in the context of a client. When commands are executed in other
* contexts (for instance a Lua script) we need a non connected client. */
if (fd != -1) {
anetNonBlock(NULL,fd);
anetEnableTcpNoDelay(NULL,fd);
if (server.tcpkeepalive)
anetKeepAlive(NULL,fd,server.tcpkeepalive);
if (aeCreateFileEvent(server.el,fd,AE_READABLE,
readQueryFromClient, c) == AE_ERR)
{
close(fd);
zfree(c);
return NULL;
}
}
selectDb(c,0);
c->fd = fd;
c->name = NULL;
c->bufpos = 0;
c->querybuf = sdsempty();
c->querybuf_peak = 0;
c->reqtype = 0;
c->argc = 0;
c->argv = NULL;
c->cmd = c->lastcmd = NULL;
c->multibulklen = 0;
c->bulklen = -1;
c->sentlen = 0;
c->flags = 0;
c->ctime = c->lastinteraction = server.unixtime;
c->authenticated = 0;
c->replstate = REDIS_REPL_NONE;
c->slave_listening_port = 0;
c->reply = listCreate();
c->reply_bytes = 0;
c->obuf_soft_limit_reached_time = 0;
listSetFreeMethod(c->reply,decrRefCount);
listSetDupMethod(c->reply,dupClientReplyValue);
c->bpop.keys = dictCreate(&setDictType,NULL);
c->bpop.timeout = 0;
c->bpop.target = NULL;
c->io_keys = listCreate();
c->watched_keys = listCreate();
listSetFreeMethod(c->io_keys,decrRefCount);
c->pubsub_channels = dictCreate(&setDictType,NULL);
c->pubsub_patterns = listCreate();
listSetFreeMethod(c->pubsub_patterns,decrRefCount);
listSetMatchMethod(c->pubsub_patterns,listMatchObjects);
if (fd != -1) listAddNodeTail(server.clients,c);
initClientMultiState(c);
return c;
}
redisClient *createClient(int fd) {
redisClient *c = zmalloc(sizeof(redisClient));
c->bufpos = 0;
anetNonBlock(NULL,fd);
anetTcpNoDelay(NULL,fd);
if (!c) return NULL;
if (aeCreateFileEvent(server.el,fd,AE_READABLE,
readQueryFromClient, c) == AE_ERR)
{
#ifdef _WIN32
closesocket(fd);
#else
close(fd);
#endif
zfree(c);
return NULL;
}
selectDb(c,0);
c->fd = fd;
c->querybuf = sdsempty();
c->reqtype = 0;
c->argc = 0;
c->argv = NULL;
c->multibulklen = 0;
c->bulklen = -1;
c->sentlen = 0;
c->flags = 0;
c->lastinteraction = time(NULL);
c->authenticated = 0;
c->replstate = REDIS_REPL_NONE;
c->reply = listCreate();
listSetFreeMethod(c->reply,decrRefCount);
listSetDupMethod(c->reply,dupClientReplyValue);
c->bpop.keys = NULL;
c->bpop.count = 0;
c->bpop.timeout = 0;
c->bpop.target = NULL;
c->io_keys = listCreate();
c->watched_keys = listCreate();
listSetFreeMethod(c->io_keys,decrRefCount);
c->pubsub_channels = dictCreate(&setDictType,NULL);
c->pubsub_patterns = listCreate();
listSetFreeMethod(c->pubsub_patterns,decrRefCount);
listSetMatchMethod(c->pubsub_patterns,listMatchObjects);
listAddNodeTail(server.clients,c);
initClientMultiState(c);
return c;
}
ugClient *createClient(int fd) {
ugClient *c = zmalloc(sizeof(ugClient));
memset(c,0,sizeof(ugClient));
if (fd != -1) {
anetNonBlock(NULL,fd);
anetEnableTcpNoDelay(NULL,fd);
if (server.tcpkeepalive)
anetKeepAlive(NULL, fd, server.tcpkeepalive);
if (aeCreateFileEvent(server.el, fd, AE_READABLE,
readQueryFromClient, c) == AE_ERR) {
#ifdef _WIN32
aeWinCloseSocket(fd);
#else
close(fd);
#endif
zfree(c);
return NULL;
}
}
if (server.config->password == NULL) {
c->authenticated = 1;
}
c->querybuf = sdsempty();
c->fd = fd;
c->ctime = c->lastinteraction = time(NULL);
c->multibulklen = 0;
c->bulklen = -1;
c->reply = listCreate();
c->reply_bytes = 0;
c->bufpos = 0;
c->sentlen = 0;
/* listSetDupMethod(c->reply, listDupReplyObjects); */
listSetFreeMethod(c->reply, listFreeReplyObjects);
c->pubsub_channels = dictCreate(&callbackDict, NULL);
c->pubsub_patterns = listCreate();
listSetMatchMethod(c->pubsub_patterns, listMatchPubsubPattern);
listSetFreeMethod(c->pubsub_patterns, listFreePubsubPattern);
/* c->pubsub_patterns = listCreate(); */
if (!server.clients) {
server.clients = createClientlist();
}
listAddNodeTail(server.clients, c);
return c;
}
/* This function free the old AOF rewrite buffer if needed, and initialize
* a fresh new one. It tests for server.aof_rewrite_buf_blocks equal to NULL
* so can be used for the first initialization as well. */
void aofRewriteBufferReset(void) {
if (server.aof_rewrite_buf_blocks)
listRelease(server.aof_rewrite_buf_blocks);
server.aof_rewrite_buf_blocks = listCreate();
listSetFreeMethod(server.aof_rewrite_buf_blocks,zfree);
}
robj *createListObject(void) {
list *l = listCreate();
robj *o = createObject(REDIS_LIST,l);
listSetFreeMethod(l,decrRefCountVoid);
o->encoding = REDIS_ENCODING_LINKEDLIST;
return o;
}
robj *createTriggleObject(void) {
list *l = listCreate();
robj *o = createObject(REDIS_LIST,l);
listSetFreeMethod(l,decrRefTriggleCount);
o->encoding = REDIS_ENCODING_RAW;
return o;
}
/* In Redis commands are always executed in the context of a client, so in
* order to load the append only file we need to create a fake client. */
struct redisClient *createFakeClient(void) {
struct redisClient *c = zmalloc(sizeof(*c));
selectDb(c,0);
c->fd = -1;
c->name = NULL;
c->querybuf = sdsempty();
c->querybuf_peak = 0;
c->argc = 0;
c->argv = NULL;
c->bufpos = 0;
c->flags = 0;
c->btype = REDIS_BLOCKED_NONE;
/* We set the fake client as a slave waiting for the synchronization
* so that Redis will not try to send replies to this client. */
c->replstate = REDIS_REPL_WAIT_BGSAVE_START;
c->reply = listCreate();
c->reply_bytes = 0;
c->obuf_soft_limit_reached_time = 0;
c->watched_keys = listCreate();
listSetFreeMethod(c->reply,decrRefCountVoid);
listSetDupMethod(c->reply,dupClientReplyValue);
initClientMultiState(c);
return c;
}
void aofRewriteBufferReset(void){
/*release old buffer list if it exists, create new buffer list*/
if(server.aof_rewrite_buf_blocks){
listRelease(server.aof_rewrite_buf_blocks);
}
server.aof_rewrite_buf_blocks = listCreate();
listSetFreeMethod(server.aof_rewrite_buf_blocks, zfree);
}
/* Initialize the slow log. This function should be called a single time
* at server startup.
*
* 初始化服务器慢查询功能。
*
* 这个函数只应该在服务器启动时执行一次。
*/
void slowlogInit(void)
{
// 保存日志的链表，FIFO 顺序
server.slowlog = listCreate();
// 日志数量计数器
server.slowlog_entry_id = 0;
// 日志链表的释构函数
listSetFreeMethod(server.slowlog,slowlogFreeEntry);
}
/* *
* slotsdel slot1 [slot2 ...]
* */
void
slotsdelCommand(redisClient *c) {
int slots_slot[HASH_SLOTS_SIZE];
int n = 0;
if (c->argc <= 1) {
addReplyErrorFormat(c, "wrong number of arguments for 'slotsdel' command");
return;
}
int i;
for (i = 1; i < c->argc; i ++) {
int slot;
if (parse_slot(c, c->argv[i], &slot) != 0) {
return;
}
slots_slot[n] = slot;
n ++;
}
for (i = 0; i < n; i ++) {
dict *d = c->db->hash_slots[slots_slot[i]];
int s = dictSize(d);
if (s == 0) {
continue;
}
list *l = listCreate();
listSetFreeMethod(l, decrRefCountVoid);
unsigned long cursor = 0;
do {
cursor = dictScan(d, cursor, slotsScanSdsKeyCallback, l);
} while (cursor != 0);
while (1) {
listNode *head = listFirst(l);
if (head == NULL) {
break;
}
robj *key = listNodeValue(head);
robj *keys[] = {key};
slotsremove(c, keys, 1, 0);
listDelNode(l, head);
}
listRelease(l);
}
addReplyMultiBulkLen(c, n);
for (i = 0; i < n; i ++) {
int n = slots_slot[i];
int s = dictSize(c->db->hash_slots[n]);
addReplyMultiBulkLen(c, 2);
addReplyLongLong(c, n);
addReplyLongLong(c, s);
}
}
/* In Redis commands are always executed in the context of a client, so in
* order to load the append only file we need to create a fake client. */
static struct redisClient *createFakeClient(void) {
struct redisClient *c = zmalloc(sizeof(*c));
selectDb(c,0);
c->fd = -1;
c->querybuf = sdsempty();
c->argc = 0;
c->argv = NULL;
c->flags = 0;
/* We set the fake client as a slave waiting for the synchronization
* so that Redis will not try to send replies to this client. */
c->replstate = REDIS_REPL_WAIT_BGSAVE_START;
c->reply = listCreate();
listSetFreeMethod(c->reply,decrRefCount);
listSetDupMethod(c->reply,dupClientReplyValue);
return c;
}
void listTypeConvert(robj *subject, int enc) {
listTypeIterator *li;
listTypeEntry entry;
redisAssertWithInfo(NULL,subject,subject->type == REDIS_LIST);
if (enc == REDIS_ENCODING_LINKEDLIST) {
list *l = listCreate();
listSetFreeMethod(l,decrRefCount);
/* listTypeGet returns a robj with incremented refcount */
li = listTypeInitIterator(subject,0,REDIS_TAIL);
while (listTypeNext(li,&entry)) listAddNodeTail(l,listTypeGet(&entry));
listTypeReleaseIterator(li);
subject->encoding = REDIS_ENCODING_LINKEDLIST;
zfree(subject->ptr);
subject->ptr = l;
} else {
redisPanic("Unsupported list conversion");
}
}
int
main(int argc, char *argv[])
{
unsigned char *zl, *p;
unsigned char *entry;
unsigned int elen;
long long value;
/* If an argument is given, use it as the random seed. */
if (argc == 2)
srand(atoi(argv[1]));
zl = createIntList();
ziplistRepr(zl);
zl = createList();
ziplistRepr(zl);
pop(zl,ZIPLIST_TAIL);
ziplistRepr(zl);
pop(zl,ZIPLIST_HEAD);
ziplistRepr(zl);
pop(zl,ZIPLIST_TAIL);
ziplistRepr(zl);
pop(zl,ZIPLIST_TAIL);
ziplistRepr(zl);
printf("Get element at index 3:\n");
{
zl = createList();
p = ziplistIndex(zl, 3);
if (!ziplistGet(p, &entry, &elen, &value)) {
printf("ERROR: Could not access index 3\n");
return 1;
}
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
printf("\n");
} else {
printf("%lld\n", value);
}
printf("\n");
}
printf("Get element at index 4 (out of range):\n");
{
zl = createList();
p = ziplistIndex(zl, 4);
if (p == NULL) {
printf("No entry\n");
} else {
printf("ERROR: Out of range index should return NULL, returned offset: %ld\n", p-zl);
return 1;
}
printf("\n");
}
printf("Get element at index -1 (last element):\n");
{
zl = createList();
p = ziplistIndex(zl, -1);
if (!ziplistGet(p, &entry, &elen, &value)) {
printf("ERROR: Could not access index -1\n");
return 1;
}
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
printf("\n");
} else {
printf("%lld\n", value);
}
printf("\n");
}
printf("Get element at index -4 (first element):\n");
{
zl = createList();
p = ziplistIndex(zl, -4);
if (!ziplistGet(p, &entry, &elen, &value)) {
printf("ERROR: Could not access index -4\n");
return 1;
}
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
printf("\n");
} else {
printf("%lld\n", value);
}
printf("\n");
}
printf("Get element at index -5 (reverse out of range):\n");
{
zl = createList();
p = ziplistIndex(zl, -5);
if (p == NULL) {
printf("No entry\n");
} else {
printf("ERROR: Out of range index should return NULL, returned offset: %ld\n", p-zl);
return 1;
}
printf("\n");
}
printf("Iterate list from 0 to end:\n");
{
zl = createList();
p = ziplistIndex(zl, 0);
while (ziplistGet(p, &entry, &elen, &value)) {
printf("Entry: ");
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
} else {
printf("%lld", value);
}
p = ziplistNext(zl,p);
printf("\n");
}
printf("\n");
}
printf("Iterate list from 1 to end:\n");
{
zl = createList();
p = ziplistIndex(zl, 1);
while (ziplistGet(p, &entry, &elen, &value)) {
printf("Entry: ");
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
} else {
printf("%lld", value);
}
p = ziplistNext(zl,p);
printf("\n");
}
printf("\n");
}
printf("Iterate list from 2 to end:\n");
{
zl = createList();
p = ziplistIndex(zl, 2);
while (ziplistGet(p, &entry, &elen, &value)) {
printf("Entry: ");
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
} else {
printf("%lld", value);
}
p = ziplistNext(zl,p);
printf("\n");
}
printf("\n");
}
printf("Iterate starting out of range:\n");
{
zl = createList();
p = ziplistIndex(zl, 4);
if (!ziplistGet(p, &entry, &elen, &value)) {
printf("No entry\n");
} else {
printf("ERROR\n");
}
printf("\n");
}
printf("Iterate from back to front:\n");
{
zl = createList();
p = ziplistIndex(zl, -1);
while (ziplistGet(p, &entry, &elen, &value)) {
printf("Entry: ");
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
} else {
printf("%lld", value);
}
p = ziplistPrev(zl,p);
printf("\n");
}
printf("\n");
}
printf("Iterate from back to front, deleting all items:\n");
{
zl = createList();
p = ziplistIndex(zl, -1);
while (ziplistGet(p, &entry, &elen, &value)) {
printf("Entry: ");
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0) perror("fwrite");
} else {
printf("%lld", value);
}
zl = ziplistDelete(zl,&p);
p = ziplistPrev(zl,p);
printf("\n");
}
printf("\n");
}
printf("Delete inclusive range 0,0:\n");
{
zl = createList();
zl = ziplistDeleteRange(zl, 0, 1);
ziplistRepr(zl);
}
printf("Delete inclusive range 0,1:\n");
{
zl = createList();
zl = ziplistDeleteRange(zl, 0, 2);
ziplistRepr(zl);
}
printf("Delete inclusive range 1,2:\n");
{
zl = createList();
zl = ziplistDeleteRange(zl, 1, 2);
ziplistRepr(zl);
}
printf("Delete with start index out of range:\n");
{
zl = createList();
zl = ziplistDeleteRange(zl, 5, 1);
ziplistRepr(zl);
}
printf("Delete with num overflow:\n");
{
zl = createList();
zl = ziplistDeleteRange(zl, 1, 5);
ziplistRepr(zl);
}
printf("Delete foo while iterating:\n");
{
zl = createList();
p = ziplistIndex(zl,0);
while (ziplistGet(p,&entry,&elen,&value)) {
if (entry && strncmp("foo",(char*)entry,elen) == 0) {
printf("Delete foo\n");
zl = ziplistDelete(zl,&p);
} else {
printf("Entry: ");
if (entry) {
if (elen && fwrite(entry,elen,1,stdout) == 0)
perror("fwrite");
} else {
printf("%lld",value);
}
p = ziplistNext(zl,p);
printf("\n");
}
}
printf("\n");
ziplistRepr(zl);
}
printf("Regression test for >255 byte strings:\n");
{
char v1[257],v2[257];
memset(v1,'x',256);
memset(v2,'y',256);
zl = ziplistNew();
zl = ziplistPush(zl,(unsigned char*)v1,strlen(v1),ZIPLIST_TAIL);
zl = ziplistPush(zl,(unsigned char*)v2,strlen(v2),ZIPLIST_TAIL);
/* Pop values again and compare their value. */
p = ziplistIndex(zl,0);
assert(ziplistGet(p,&entry,&elen,&value));
assert(strncmp(v1,(char*)entry,elen) == 0);
p = ziplistIndex(zl,1);
assert(ziplistGet(p,&entry,&elen,&value));
assert(strncmp(v2,(char*)entry,elen) == 0);
printf("SUCCESS\n\n");
}
printf("Regression test deleting next to last entries:\n");
{
char v[3][257];
zlentry e[3];
int i;
for (i = 0; i < (sizeof(v)/sizeof(v[0])); i++) {
memset(v[i], 'a' + i, sizeof(v[0]));
}
v[0][256] = '\0';
v[1][ 1] = '\0';
v[2][256] = '\0';
zl = ziplistNew();
for (i = 0; i < (sizeof(v)/sizeof(v[0])); i++) {
zl = ziplistPush(zl, (unsigned char *) v[i], strlen(v[i]), ZIPLIST_TAIL);
}
verify(zl, e);
assert(e[0].prevrawlensize == 1);
assert(e[1].prevrawlensize == 5);
assert(e[2].prevrawlensize == 1);
/* Deleting entry 1 will increase `prevrawlensize` for entry 2 */
unsigned char *p = e[1].p;
zl = ziplistDelete(zl, &p);
verify(zl, e);
assert(e[0].prevrawlensize == 1);
assert(e[1].prevrawlensize == 5);
printf("SUCCESS\n\n");
}
printf("Create long list and check indices:\n");
{
zl = ziplistNew();
char buf[32];
int i,len;
for (i = 0; i < 1000; i++) {
len = sprintf(buf,"%d",i);
zl = ziplistPush(zl,(unsigned char*)buf,len,ZIPLIST_TAIL);
}
for (i = 0; i < 1000; i++) {
p = ziplistIndex(zl,i);
assert(ziplistGet(p,NULL,NULL,&value));
assert(i == value);
p = ziplistIndex(zl,-i-1);
assert(ziplistGet(p,NULL,NULL,&value));
assert(999-i == value);
}
printf("SUCCESS\n\n");
}
printf("Compare strings with ziplist entries:\n");
{
zl = createList();
p = ziplistIndex(zl,0);
if (!ziplistCompare(p,(unsigned char*)"hello",5)) {
printf("ERROR: not \"hello\"\n");
return 1;
}
if (ziplistCompare(p,(unsigned char*)"hella",5)) {
printf("ERROR: \"hella\"\n");
return 1;
}
p = ziplistIndex(zl,3);
if (!ziplistCompare(p,(unsigned char*)"1024",4)) {
printf("ERROR: not \"1024\"\n");
return 1;
}
if (ziplistCompare(p,(unsigned char*)"1025",4)) {
printf("ERROR: \"1025\"\n");
return 1;
}
printf("SUCCESS\n\n");
}
printf("Stress with random payloads of different encoding:\n");
{
int i,j,len,where;
unsigned char *p;
char buf[1024];
int buflen;
list *ref;
listNode *refnode;
/* Hold temp vars from ziplist */
unsigned char *sstr;
unsigned int slen;
long long sval;
for (i = 0; i < 20000; i++) {
zl = ziplistNew();
ref = listCreate();
listSetFreeMethod(ref, sdsfree);
len = rand() % 256;
/* Create lists */
for (j = 0; j < len; j++) {
where = (rand() & 1) ? ZIPLIST_HEAD : ZIPLIST_TAIL;
if (rand() % 2) {
buflen = randstring(buf,1,sizeof(buf)-1);
} else {
switch(rand() % 3) {
case 0:
buflen = sprintf(buf,"%lld",(0LL + rand()) >> 20);
break;
case 1:
buflen = sprintf(buf,"%lld",(0LL + rand()));
break;
case 2:
buflen = sprintf(buf,"%lld",(0LL + rand()) << 20);
break;
default:
assert(NULL);
}
}
/* Add to ziplist */
zl = ziplistPush(zl, (unsigned char*)buf, buflen, where);
/* Add to reference list */
if (where == ZIPLIST_HEAD) {
listAddNodeHead(ref,sdsnewlen(buf, buflen));
} else if (where == ZIPLIST_TAIL) {
listAddNodeTail(ref,sdsnewlen(buf, buflen));
} else {
assert(NULL);
}
}
assert(listLength(ref) == ziplistLen(zl));
for (j = 0; j < len; j++) {
/* Naive way to get elements, but similar to the stresser
* executed from the Tcl test suite. */
p = ziplistIndex(zl,j);
refnode = listIndex(ref,j);
assert(ziplistGet(p,&sstr,&slen,&sval));
if (sstr == NULL) {
buflen = sprintf(buf,"%lld",sval);
} else {
buflen = slen;
memcpy(buf,sstr,buflen);
buf[buflen] = '\0';
}
assert(memcmp(buf,listNodeValue(refnode),buflen) == 0);
}
zfree(zl);
listRelease(ref);
}
printf("SUCCESS\n\n");
}
printf("Stress with variable ziplist size:\n");
{
stress(ZIPLIST_HEAD,100000,16384,256);
stress(ZIPLIST_TAIL,100000,16384,256);
}
return 0;
}
/* Initialize the slow log. This function should be called a single time
* at server startup. */
void slowlogInit(void) {
server.slowlog = listCreate();
server.slowlog_entry_id = 0;
listSetFreeMethod(server.slowlog,slowlogFreeEntry);
}
/* The SORT command is the most complex command in Redis. Warning: this code
* is optimized for speed and a bit less for readability */
void sortCommand(redisClient *c) {
list *operations;
unsigned int outputlen = 0;
int desc = 0, alpha = 0;
long limit_start = 0, limit_count = -1, start, end;
int j, dontsort = 0, vectorlen;
int getop = 0; /* GET operation counter */
int int_convertion_error = 0;
robj *sortval, *sortby = NULL, *storekey = NULL;
redisSortObject *vector; /* Resulting vector to sort */
/* Lookup the key to sort. It must be of the right types */
sortval = lookupKeyRead(c->db,c->argv[1]);
if (sortval && sortval->type != REDIS_SET && sortval->type != REDIS_LIST &&
sortval->type != REDIS_ZSET)
{
addReply(c,shared.wrongtypeerr);
return;
}
/* Create a list of operations to perform for every sorted element.
* Operations can be GET/DEL/INCR/DECR */
operations = listCreate();
listSetFreeMethod(operations,zfree);
j = 2;
/* Now we need to protect sortval incrementing its count, in the future
* SORT may have options able to overwrite/delete keys during the sorting
* and the sorted key itself may get destroied */
if (sortval)
incrRefCount(sortval);
else
sortval = createListObject();
/* The SORT command has an SQL-alike syntax, parse it */
while(j < c->argc) {
int leftargs = c->argc-j-1;
if (!strcasecmp(c->argv[j]->ptr,"asc")) {
desc = 0;
} else if (!strcasecmp(c->argv[j]->ptr,"desc")) {
desc = 1;
} else if (!strcasecmp(c->argv[j]->ptr,"alpha")) {
alpha = 1;
} else if (!strcasecmp(c->argv[j]->ptr,"limit") && leftargs >= 2) {
if ((getLongFromObjectOrReply(c, c->argv[j+1], &limit_start, NULL) != REDIS_OK) ||
(getLongFromObjectOrReply(c, c->argv[j+2], &limit_count, NULL) != REDIS_OK)) return;
j+=2;
} else if (!strcasecmp(c->argv[j]->ptr,"store") && leftargs >= 1) {
storekey = c->argv[j+1];
j++;
} else if (!strcasecmp(c->argv[j]->ptr,"by") && leftargs >= 1) {
sortby = c->argv[j+1];
/* If the BY pattern does not contain '*', i.e. it is constant,
* we don't need to sort nor to lookup the weight keys. */
if (strchr(c->argv[j+1]->ptr,'*') == NULL) dontsort = 1;
j++;
} else if (!strcasecmp(c->argv[j]->ptr,"get") && leftargs >= 1) {
listAddNodeTail(operations,createSortOperation(
REDIS_SORT_GET,c->argv[j+1]));
getop++;
j++;
} else {
decrRefCount(sortval);
listRelease(operations);
addReply(c,shared.syntaxerr);
return;
}
j++;
}
/* If we have STORE we need to force sorting for deterministic output
* and replication. We use alpha sorting since this is guaranteed to
* work with any input. */
if (storekey && dontsort) {
dontsort = 0;
alpha = 1;
sortby = NULL;
}
/* Destructively convert encoded sorted sets for SORT. */
if (sortval->type == REDIS_ZSET)
zsetConvert(sortval, REDIS_ENCODING_SKIPLIST);
/* Load the sorting vector with all the objects to sort */
switch(sortval->type) {
case REDIS_LIST: vectorlen = listTypeLength(sortval); break;
case REDIS_SET: vectorlen = setTypeSize(sortval); break;
case REDIS_ZSET: vectorlen = dictSize(((zset*)sortval->ptr)->dict); break;
default: vectorlen = 0; redisPanic("Bad SORT type"); /* Avoid GCC warning */
}
vector = zmalloc(sizeof(redisSortObject)*vectorlen);
j = 0;
if (sortval->type == REDIS_LIST) {
listTypeIterator *li = listTypeInitIterator(sortval,0,REDIS_TAIL);
listTypeEntry entry;
while(listTypeNext(li,&entry)) {
vector[j].obj = listTypeGet(&entry);
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
listTypeReleaseIterator(li);
} else if (sortval->type == REDIS_SET) {
setTypeIterator *si = setTypeInitIterator(sortval);
robj *ele;
while((ele = setTypeNextObject(si)) != NULL) {
vector[j].obj = ele;
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
setTypeReleaseIterator(si);
} else if (sortval->type == REDIS_ZSET) {
dict *set = ((zset*)sortval->ptr)->dict;
dictIterator *di;
dictEntry *setele;
di = dictGetIterator(set);
while((setele = dictNext(di)) != NULL) {
vector[j].obj = dictGetKey(setele);
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
dictReleaseIterator(di);
} else {
redisPanic("Unknown type");
}
redisAssertWithInfo(c,sortval,j == vectorlen);
/* Now it's time to load the right scores in the sorting vector */
if (dontsort == 0) {
for (j = 0; j < vectorlen; j++) {
robj *byval;
if (sortby) {
/* lookup value to sort by */
byval = lookupKeyByPattern(c->db,sortby,vector[j].obj);
if (!byval) continue;
} else {
/* use object itself to sort by */
byval = vector[j].obj;
}
if (alpha) {
if (sortby) vector[j].u.cmpobj = getDecodedObject(byval);
} else {
if (byval->encoding == REDIS_ENCODING_RAW) {
char *eptr;
vector[j].u.score = strtod(byval->ptr,&eptr);
if (eptr[0] != '\0' || errno == ERANGE ||
isnan(vector[j].u.score))
{
int_convertion_error = 1;
}
} else if (byval->encoding == REDIS_ENCODING_INT) {
/* Don't need to decode the object if it's
* integer-encoded (the only encoding supported) so
* far. We can just cast it */
vector[j].u.score = (long)byval->ptr;
} else {
redisAssertWithInfo(c,sortval,1 != 1);
}
}
/* when the object was retrieved using lookupKeyByPattern,
* its refcount needs to be decreased. */
if (sortby) {
decrRefCount(byval);
}
}
}
/* We are ready to sort the vector... perform a bit of sanity check
* on the LIMIT option too. We'll use a partial version of quicksort. */
start = (limit_start < 0) ? 0 : limit_start;
end = (limit_count < 0) ? vectorlen-1 : start+limit_count-1;
if (start >= vectorlen) {
start = vectorlen-1;
end = vectorlen-2;
}
if (end >= vectorlen) end = vectorlen-1;
server.sort_dontsort = dontsort;
if (dontsort == 0) {
server.sort_desc = desc;
server.sort_alpha = alpha;
server.sort_bypattern = sortby ? 1 : 0;
if (sortby && (start != 0 || end != vectorlen-1))
pqsort(vector,vectorlen,sizeof(redisSortObject),sortCompare, start,end);
else
qsort(vector,vectorlen,sizeof(redisSortObject),sortCompare);
}
/* Send command output to the output buffer, performing the specified
* GET/DEL/INCR/DECR operations if any. */
outputlen = getop ? getop*(end-start+1) : end-start+1;
if (int_convertion_error) {
addReplyError(c,"One or more scores can't be converted into double");
} else if (storekey == NULL) {
/* STORE option not specified, sent the sorting result to client */
addReplyMultiBulkLen(c,outputlen);
for (j = start; j <= end; j++) {
listNode *ln;
listIter li;
if (!getop) addReplyBulk(c,vector[j].obj);
listRewind(operations,&li);
while((ln = listNext(&li))) {
redisSortOperation *sop = ln->value;
robj *val = lookupKeyByPattern(c->db,sop->pattern,
vector[j].obj);
if (sop->type == REDIS_SORT_GET) {
if (!val) {
addReply(c,shared.nullbulk);
} else {
addReplyBulk(c,val);
decrRefCount(val);
}
} else {
/* Always fails */
redisAssertWithInfo(c,sortval,sop->type == REDIS_SORT_GET);
}
}
}
} else {
robj *sobj = createZiplistObject();
/* STORE option specified, set the sorting result as a List object */
for (j = start; j <= end; j++) {
listNode *ln;
listIter li;
if (!getop) {
listTypePush(sobj,vector[j].obj,REDIS_TAIL);
} else {
listRewind(operations,&li);
while((ln = listNext(&li))) {
redisSortOperation *sop = ln->value;
robj *val = lookupKeyByPattern(c->db,sop->pattern,
vector[j].obj);
if (sop->type == REDIS_SORT_GET) {
if (!val) val = createStringObject("",0);
/* listTypePush does an incrRefCount, so we should take care
* care of the incremented refcount caused by either
* lookupKeyByPattern or createStringObject("",0) */
listTypePush(sobj,val,REDIS_TAIL);
decrRefCount(val);
} else {
/* Always fails */
redisAssertWithInfo(c,sortval,sop->type == REDIS_SORT_GET);
}
}
}
}
if (outputlen) {
setKey(c->db,storekey,sobj);
server.dirty += outputlen;
} else if (dbDelete(c->db,storekey)) {
signalModifiedKey(c->db,storekey);
server.dirty++;
}
decrRefCount(sobj);
addReplyLongLong(c,outputlen);
}
/* Cleanup */
if (sortval->type == REDIS_LIST || sortval->type == REDIS_SET)
for (j = 0; j < vectorlen; j++)
decrRefCount(vector[j].obj);
decrRefCount(sortval);
listRelease(operations);
for (j = 0; j < vectorlen; j++) {
if (alpha && vector[j].u.cmpobj)
decrRefCount(vector[j].u.cmpobj);
}
zfree(vector);
}
static list *index_list_create() {
list *idx = listCreate();
listSetMatchMethod(idx, fts_doc_match);
listSetFreeMethod(idx, index_item_free);
return idx;
}
list *createClientlist( ) {
list *clients = listCreate();
listSetFreeMethod(clients, listDeleteClientObjects);
listSetMatchMethod(clients, listMatchClientObjects);
return clients;
}
/* This command implements SCAN, HSCAN and SSCAN commands.
* If object 'o' is passed, then it must be a Hash or Set object, otherwise
* if 'o' is NULL the command will operate on the dictionary associated with
* the current database.
*
* When 'o' is not NULL the function assumes that the first argument in
* the client arguments vector is a key so it skips it before iterating
* in order to parse options.
*
* In the case of a Hash object the function returns both the field and value
* of every element on the Hash. */
void scanGenericCommand(client *c, robj *o, unsigned long cursor) {
int i, j;
list *keys = listCreate();
listNode *node, *nextnode;
long count = 10;
sds pat = NULL;
int patlen = 0, use_pattern = 0;
dict *ht;
/* Object must be NULL (to iterate keys names), or the type of the object
* must be Set, Sorted Set, or Hash. */
serverAssert(o == NULL || o->type == OBJ_SET || o->type == OBJ_HASH ||
o->type == OBJ_ZSET);
/* Set i to the first option argument. The previous one is the cursor. */
i = (o == NULL) ? 2 : 3; /* Skip the key argument if needed. */
/* Step 1: Parse options. */
while (i < c->argc) {
j = c->argc - i;
if (!strcasecmp(c->argv[i]->ptr, "count") && j >= 2) {
if (getLongFromObjectOrReply(c, c->argv[i+1], &count, NULL)
!= C_OK)
{
goto cleanup;
}
if (count < 1) {
addReply(c,shared.syntaxerr);
goto cleanup;
}
i += 2;
} else if (!strcasecmp(c->argv[i]->ptr, "match") && j >= 2) {
pat = c->argv[i+1]->ptr;
patlen = sdslen(pat);
/* The pattern always matches if it is exactly "*", so it is
* equivalent to disabling it. */
use_pattern = !(pat[0] == '*' && patlen == 1);
i += 2;
} else {
addReply(c,shared.syntaxerr);
goto cleanup;
}
}
/* Step 2: Iterate the collection.
*
* Note that if the object is encoded with a ziplist, intset, or any other
* representation that is not a hash table, we are sure that it is also
* composed of a small number of elements. So to avoid taking state we
* just return everything inside the object in a single call, setting the
* cursor to zero to signal the end of the iteration. */
/* Handle the case of a hash table. */
ht = NULL;
if (o == NULL) {
ht = c->db->dict;
} else if (o->type == OBJ_SET && o->encoding == OBJ_ENCODING_HT) {
ht = o->ptr;
} else if (o->type == OBJ_HASH && o->encoding == OBJ_ENCODING_HT) {
ht = o->ptr;
count *= 2; /* We return key / value for this type. */
} else if (o->type == OBJ_ZSET && o->encoding == OBJ_ENCODING_SKIPLIST) {
zset *zs = o->ptr;
ht = zs->dict;
count *= 2; /* We return key / value for this type. */
}
if (ht) {
void *privdata[2];
/* We set the max number of iterations to ten times the specified
* COUNT, so if the hash table is in a pathological state (very
* sparsely populated) we avoid to block too much time at the cost
* of returning no or very few elements. */
long maxiterations = count*10;
/* We pass two pointers to the callback: the list to which it will
* add new elements, and the object containing the dictionary so that
* it is possible to fetch more data in a type-dependent way. */
privdata[0] = keys;
privdata[1] = o;
do {
cursor = dictScan(ht, cursor, scanCallback, privdata);
} while (cursor &&
maxiterations-- &&
listLength(keys) < (unsigned long)count);
} else if (o->type == OBJ_SET) {
int pos = 0;
int64_t ll;
while(intsetGet(o->ptr,pos++,&ll))
listAddNodeTail(keys,createStringObjectFromLongLong(ll));
cursor = 0;
} else if (o->type == OBJ_HASH || o->type == OBJ_ZSET) {
unsigned char *p = ziplistIndex(o->ptr,0);
unsigned char *vstr;
unsigned int vlen;
long long vll;
while(p) {
ziplistGet(p,&vstr,&vlen,&vll);
listAddNodeTail(keys,
(vstr != NULL) ? createStringObject((char*)vstr,vlen) :
createStringObjectFromLongLong(vll));
p = ziplistNext(o->ptr,p);
}
cursor = 0;
} else {
serverPanic("Not handled encoding in SCAN.");
}
/* Step 3: Filter elements. */
node = listFirst(keys);
while (node) {
robj *kobj = listNodeValue(node);
nextnode = listNextNode(node);
int filter = 0;
/* Filter element if it does not match the pattern. */
if (!filter && use_pattern) {
if (sdsEncodedObject(kobj)) {
if (!stringmatchlen(pat, patlen, kobj->ptr, sdslen(kobj->ptr), 0))
filter = 1;
} else {
char buf[LONG_STR_SIZE];
int len;
serverAssert(kobj->encoding == OBJ_ENCODING_INT);
len = ll2string(buf,sizeof(buf),(long)kobj->ptr);
if (!stringmatchlen(pat, patlen, buf, len, 0)) filter = 1;
}
}
/* Filter element if it is an expired key. */
if (!filter && o == NULL && expireIfNeeded(c->db, kobj)) filter = 1;
/* Remove the element and its associted value if needed. */
if (filter) {
decrRefCount(kobj);
listDelNode(keys, node);
}
/* If this is a hash or a sorted set, we have a flat list of
* key-value elements, so if this element was filtered, remove the
* value, or skip it if it was not filtered: we only match keys. */
if (o && (o->type == OBJ_ZSET || o->type == OBJ_HASH)) {
node = nextnode;
nextnode = listNextNode(node);
if (filter) {
kobj = listNodeValue(node);
decrRefCount(kobj);
listDelNode(keys, node);
}
}
node = nextnode;
}
/* Step 4: Reply to the client. */
addReplyMultiBulkLen(c, 2);
addReplyBulkLongLong(c,cursor);
addReplyMultiBulkLen(c, listLength(keys));
while ((node = listFirst(keys)) != NULL) {
robj *kobj = listNodeValue(node);
addReplyBulk(c, kobj);
decrRefCount(kobj);
listDelNode(keys, node);
}
cleanup:
listSetFreeMethod(keys,decrRefCountVoid);
listRelease(keys);
}
/* *
* slotscheck
* */
void
slotscheckCommand(redisClient *c) {
sds bug = NULL;
int i;
for (i = 0; i < HASH_SLOTS_SIZE && bug == NULL; i ++) {
dict *d = c->db->hash_slots[i];
if (dictSize(d) == 0) {
continue;
}
list *l = listCreate();
listSetFreeMethod(l, decrRefCountVoid);
unsigned long cursor = 0;
do {
cursor = dictScan(d, cursor, slotsScanSdsKeyCallback, l);
while (1) {
listNode *head = listFirst(l);
if (head == NULL) {
break;
}
robj *key = listNodeValue(head);
if (lookupKey(c->db, key) == NULL) {
if (bug == NULL) {
bug = sdsdup(key->ptr);
}
}
listDelNode(l, head);
}
} while (cursor != 0 && bug == NULL);
listRelease(l);
}
if (bug != NULL) {
addReplyErrorFormat(c, "step 1, miss = '%s'", bug);
sdsfree(bug);
return;
}
do {
dict *d = c->db->dict;
if (dictSize(d) == 0) {
break;
}
list *l = listCreate();
listSetFreeMethod(l, decrRefCountVoid);
unsigned long cursor = 0;
do {
cursor = dictScan(d, cursor, slotsScanSdsKeyCallback, l);
while (1) {
listNode *head = listFirst(l);
if (head == NULL) {
break;
}
robj *key = listNodeValue(head);
int slot = slots_num(key->ptr, NULL);
if (dictFind(c->db->hash_slots[slot], key->ptr) == NULL) {
if (bug == NULL) {
bug = sdsdup(key->ptr);
}
}
listDelNode(l, head);
}
} while (cursor != 0 && bug == NULL);
listRelease(l);
} while (0);
if (bug != NULL) {
addReplyErrorFormat(c, "step 2, miss = '%s'", bug);
sdsfree(bug);
return;
}
addReply(c, shared.ok);
}
/* The SORT command is the most complex command in Redis. Warning: this code
* is optimized for speed and a bit less for readability */
void sortCommand(redisClient *c) {
list *operations;
unsigned int outputlen = 0;
int desc = 0, alpha = 0;
long limit_start = 0, limit_count = -1, start, end;
int j, dontsort = 0, vectorlen;
int getop = 0; /* GET operation counter */
int int_convertion_error = 0;
robj *sortval, *sortby = NULL, *storekey = NULL;
redisSortObject *vector; /* Resulting vector to sort */
/* Lookup the key to sort. It must be of the right types */
sortval = lookupKeyRead(c->db,c->argv[1]);
if (sortval && sortval->type != REDIS_SET &&
sortval->type != REDIS_LIST &&
sortval->type != REDIS_ZSET)
{
addReply(c,shared.wrongtypeerr);
return;
}
/* Create a list of operations to perform for every sorted element.
* Operations can be GET/DEL/INCR/DECR */
operations = listCreate();
listSetFreeMethod(operations,zfree);
j = 2; /* options start at argv[2] */
/* Now we need to protect sortval incrementing its count, in the future
* SORT may have options able to overwrite/delete keys during the sorting
* and the sorted key itself may get destroyed */
if (sortval)
incrRefCount(sortval);
else
sortval = createListObject();
/* The SORT command has an SQL-alike syntax, parse it */
while(j < c->argc) {
int leftargs = c->argc-j-1;
if (!strcasecmp(c->argv[j]->ptr,"asc")) {
desc = 0;
} else if (!strcasecmp(c->argv[j]->ptr,"desc")) {
desc = 1;
} else if (!strcasecmp(c->argv[j]->ptr,"alpha")) {
alpha = 1;
} else if (!strcasecmp(c->argv[j]->ptr,"limit") && leftargs >= 2) {
if ((getLongFromObjectOrReply(c, c->argv[j+1], &limit_start, NULL) != REDIS_OK) ||
(getLongFromObjectOrReply(c, c->argv[j+2], &limit_count, NULL) != REDIS_OK)) return;
j+=2;
} else if (!strcasecmp(c->argv[j]->ptr,"store") && leftargs >= 1) {
storekey = c->argv[j+1];
j++;
} else if (!strcasecmp(c->argv[j]->ptr,"by") && leftargs >= 1) {
sortby = c->argv[j+1];
/* If the BY pattern does not contain '*', i.e. it is constant,
* we don't need to sort nor to lookup the weight keys. */
if (strchr(c->argv[j+1]->ptr,'*') == NULL) dontsort = 1;
j++;
} else if (!strcasecmp(c->argv[j]->ptr,"get") && leftargs >= 1) {
listAddNodeTail(operations,createSortOperation(
REDIS_SORT_GET,c->argv[j+1]));
getop++;
j++;
} else {
decrRefCount(sortval);
listRelease(operations);
addReply(c,shared.syntaxerr);
return;
}
j++;
}
/* For the STORE option, or when SORT is called from a Lua script,
* we want to force a specific ordering even when no explicit ordering
* was asked (SORT BY nosort). This guarantees that replication / AOF
* is deterministic.
*
* However in the case 'dontsort' is true, but the type to sort is a
* sorted set, we don't need to do anything as ordering is guaranteed
* in this special case. */
if ((storekey || c->flags & REDIS_LUA_CLIENT) &&
(dontsort && sortval->type != REDIS_ZSET))
{
/* Force ALPHA sorting */
dontsort = 0;
alpha = 1;
sortby = NULL;
}
/* Destructively convert encoded sorted sets for SORT. */
if (sortval->type == REDIS_ZSET)
zsetConvert(sortval, REDIS_ENCODING_SKIPLIST);
/* Objtain the length of the object to sort. */
switch(sortval->type) {
case REDIS_LIST: vectorlen = listTypeLength(sortval); break;
case REDIS_SET: vectorlen = setTypeSize(sortval); break;
case REDIS_ZSET: vectorlen = dictSize(((zset*)sortval->ptr)->dict); break;
default: vectorlen = 0; redisPanic("Bad SORT type"); /* Avoid GCC warning */
}
/* Perform LIMIT start,count sanity checking. */
start = (limit_start < 0) ? 0 : limit_start;
end = (limit_count < 0) ? vectorlen-1 : start+limit_count-1;
if (start >= vectorlen) {
start = vectorlen-1;
end = vectorlen-2;
}
if (end >= vectorlen) end = vectorlen-1;
/* Optimization:
*
* 1) if the object to sort is a sorted set.
* 2) There is nothing to sort as dontsort is true (BY <constant string>).
* 3) We have a LIMIT option that actually reduces the number of elements
* to fetch.
*
* In this case to load all the objects in the vector is a huge waste of
* resources. We just allocate a vector that is big enough for the selected
* range length, and make sure to load just this part in the vector. */
if (sortval->type == REDIS_ZSET &&
dontsort &&
(start != 0 || end != vectorlen-1))
{
vectorlen = end-start+1;
}
/* Load the sorting vector with all the objects to sort */
vector = zmalloc(sizeof(redisSortObject)*vectorlen);
j = 0;
if (sortval->type == REDIS_LIST) {
listTypeIterator *li = listTypeInitIterator(sortval,0,REDIS_TAIL);
listTypeEntry entry;
while(listTypeNext(li,&entry)) {
vector[j].obj = listTypeGet(&entry);
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
listTypeReleaseIterator(li);
} else if (sortval->type == REDIS_SET) {
setTypeIterator *si = setTypeInitIterator(sortval);
robj *ele;
while((ele = setTypeNextObject(si)) != NULL) {
vector[j].obj = ele;
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
setTypeReleaseIterator(si);
} else if (sortval->type == REDIS_ZSET && dontsort) {
/* Special handling for a sorted set, if 'dontsort' is true.
* This makes sure we return elements in the sorted set original
* ordering, accordingly to DESC / ASC options.
*
* Note that in this case we also handle LIMIT here in a direct
* way, just getting the required range, as an optimization. */
zset *zs = sortval->ptr;
zskiplist *zsl = zs->zsl;
zskiplistNode *ln;
robj *ele;
int rangelen = vectorlen;
/* Check if starting point is trivial, before doing log(N) lookup. */
if (desc) {
long zsetlen = dictSize(((zset*)sortval->ptr)->dict);
ln = zsl->tail;
if (start > 0)
ln = zslGetElementByRank(zsl,zsetlen-start);
} else {
ln = zsl->header->level[0].forward;
if (start > 0)
ln = zslGetElementByRank(zsl,start+1);
}
while(rangelen--) {
redisAssertWithInfo(c,sortval,ln != NULL);
ele = ln->obj;
vector[j].obj = ele;
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
ln = desc ? ln->backward : ln->level[0].forward;
}
/* The code producing the output does not know that in the case of
* sorted set, 'dontsort', and LIMIT, we are able to get just the
* range, already sorted, so we need to adjust "start" and "end"
* to make sure start is set to 0. */
end -= start;
start = 0;
} else if (sortval->type == REDIS_ZSET) {
dict *set = ((zset*)sortval->ptr)->dict;
dictIterator *di;
dictEntry *setele;
di = dictGetIterator(set);
while((setele = dictNext(di)) != NULL) {
vector[j].obj = dictGetKey(setele);
vector[j].u.score = 0;
vector[j].u.cmpobj = NULL;
j++;
}
dictReleaseIterator(di);
} else {
redisPanic("Unknown type");
}
redisAssertWithInfo(c,sortval,j == vectorlen);
/* Now it's time to load the right scores in the sorting vector */
if (dontsort == 0) {
for (j = 0; j < vectorlen; j++) {
robj *byval;
if (sortby) {
/* lookup value to sort by */
byval = lookupKeyByPattern(c->db,sortby,vector[j].obj);
if (!byval) continue;
} else {
/* use object itself to sort by */
byval = vector[j].obj;
}
if (alpha) {
if (sortby) vector[j].u.cmpobj = getDecodedObject(byval);
} else {
if (byval->encoding == REDIS_ENCODING_RAW) {
char *eptr;
vector[j].u.score = strtod(byval->ptr,&eptr);
if (eptr[0] != '\0' || errno == ERANGE ||
isnan(vector[j].u.score))
{
int_convertion_error = 1;
}
} else if (byval->encoding == REDIS_ENCODING_INT) {
/* Don't need to decode the object if it's
* integer-encoded (the only encoding supported) so
* far. We can just cast it */
vector[j].u.score = (long)byval->ptr;
} else {
redisAssertWithInfo(c,sortval,1 != 1);
}
}
/* when the object was retrieved using lookupKeyByPattern,
* its refcount needs to be decreased. */
if (sortby) {
decrRefCount(byval);
}
}
}
if (dontsort == 0) {
server.sort_desc = desc;
server.sort_alpha = alpha;
server.sort_bypattern = sortby ? 1 : 0;
server.sort_store = storekey ? 1 : 0;
if (sortby && (start != 0 || end != vectorlen-1))
pqsort(vector,vectorlen,sizeof(redisSortObject),sortCompare, start,end);
else
qsort(vector,vectorlen,sizeof(redisSortObject),sortCompare);
}
/* Send command output to the output buffer, performing the specified
* GET/DEL/INCR/DECR operations if any. */
outputlen = getop ? getop*(end-start+1) : end-start+1;
if (int_convertion_error) {
addReplyError(c,"One or more scores can't be converted into double");
} else if (storekey == NULL) {
/* STORE option not specified, sent the sorting result to client */
addReplyMultiBulkLen(c,outputlen);
for (j = start; j <= end; j++) {
listNode *ln;
listIter li;
if (!getop) addReplyBulk(c,vector[j].obj);
listRewind(operations,&li);
while((ln = listNext(&li))) {
redisSortOperation *sop = ln->value;
robj *val = lookupKeyByPattern(c->db,sop->pattern,
vector[j].obj);
if (sop->type == REDIS_SORT_GET) {
if (!val) {
addReply(c,shared.nullbulk);
} else {
addReplyBulk(c,val);
decrRefCount(val);
}
} else {
/* Always fails */
redisAssertWithInfo(c,sortval,sop->type == REDIS_SORT_GET);
}
}
}
} else {
robj *sobj = createZiplistObject();
/* STORE option specified, set the sorting result as a List object */
for (j = start; j <= end; j++) {
listNode *ln;
listIter li;
if (!getop) {
listTypePush(sobj,vector[j].obj,REDIS_TAIL);
} else {
listRewind(operations,&li);
while((ln = listNext(&li))) {
redisSortOperation *sop = ln->value;
robj *val = lookupKeyByPattern(c->db,sop->pattern,
vector[j].obj);
if (sop->type == REDIS_SORT_GET) {
if (!val) val = createStringObject("",0);
/* listTypePush does an incrRefCount, so we should take care
* care of the incremented refcount caused by either
* lookupKeyByPattern or createStringObject("",0) */
listTypePush(sobj,val,REDIS_TAIL);
decrRefCount(val);
} else {
/* Always fails */
redisAssertWithInfo(c,sortval,sop->type == REDIS_SORT_GET);
}
}
}
}
if (outputlen) {
setKey(c->db,storekey,sobj);
notifyKeyspaceEvent(REDIS_NOTIFY_LIST,"sortstore",storekey,
c->db->id);
server.dirty += outputlen;
} else if (dbDelete(c->db,storekey)) {
signalModifiedKey(c->db,storekey);
notifyKeyspaceEvent(REDIS_NOTIFY_GENERIC,"del",storekey,c->db->id);
server.dirty++;
}
decrRefCount(sobj);
addReplyLongLong(c,outputlen);
}
/* Cleanup */
if (sortval->type == REDIS_LIST || sortval->type == REDIS_SET)
for (j = 0; j < vectorlen; j++)
decrRefCount(vector[j].obj);
decrRefCount(sortval);
listRelease(operations);
for (j = 0; j < vectorlen; j++) {
if (alpha && vector[j].u.cmpobj)
decrRefCount(vector[j].u.cmpobj);
}
zfree(vector);
}
/* *
* do migrate mutli key-value(s) for {slotsmgrt/slotsmgrtone}with tag commands
* return value:
* -1 - error happens
* >=0 - # of success migration
* */
static int
slotsmgrttag_command(redisClient *c, sds host, sds port, int timeout, robj *key) {
int taglen;
void *tag = slots_tag(key->ptr, &taglen);
if (tag == NULL) {
return slotsmgrtone_command(c, host, port, timeout, key);
}
int fd = slotsmgrt_get_socket(c, host, port, timeout);
if (fd == -1) {
return -1;
}
list *l = listCreate();
listSetFreeMethod(l, decrRefCountVoid);
do {
uint32_t crc;
int slot = slots_num(key->ptr, &crc);
dict *d = c->db->hash_slots[slot];
long long cursor = 0;
void *args[] = {l, tag, &taglen, (void *)(long)crc};
do {
cursor = dictScan(d, cursor, slotsScanSdsKeyTagCallback, args);
} while (cursor != 0);
} while (0);
int max = listLength(l);
if (max == 0) {
listRelease(l);
return 0;
}
robj **keys = zmalloc(sizeof(robj *) * max);
robj **vals = zmalloc(sizeof(robj *) * max);
int n = 0;
for (int i = 0; i < max; i ++) {
listNode *head = listFirst(l);
robj *key = listNodeValue(head);
robj *val = lookupKeyWrite(c->db, key);
if (val != NULL) {
keys[n] = key;
vals[n] = val;
n ++;
incrRefCount(key);
}
listDelNode(l, head);
}
int ret = 0;
if (n != 0) {
if (slotsmgrt(c, host, port, fd, c->db->id, timeout, keys, vals, n) != 0) {
slotsmgrt_close_socket(host, port);
ret = -1;
} else {
slotsremove(c, keys, n, 1);
ret = n;
}
}
listRelease(l);
for (int i = 0; i < n; i ++) {
decrRefCount(keys[i]);
}
zfree(keys);
zfree(vals);
return ret;
}
static robj *createListObject(void) {
list *l = listCreate();
listSetFreeMethod(l,decrRefCount);
return createObject(REDIS_LIST,l);
}
