void pushGenericCommand(redisClient *c, int where) {
int j, waiting = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
if (lobj && lobj->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (!lobj) {
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
}
listTypePush(lobj,c->argv[j],where);
pushed++;
}
addReplyLongLong(c, waiting + (lobj ? listTypeLength(lobj) : 0));
if (pushed) {
char *event = (where == REDIS_HEAD) ? "lpush" : "rpush";
signalModifiedKey(c->db,c->argv[1]);
notifyKeyspaceEvent(REDIS_NOTIFY_LIST,event,c->argv[1],c->db->id);
}
server.dirty += pushed;
}
// XX 对应的getset实现吗?
void setCommand(redisClient *c) {
int j;
robj *expire = NULL;
int unit = UNIT_SECONDS;
int flags = REDIS_SET_NO_FLAGS;
for (j = 3; j < c->argc; j++) {
char *a = c->argv[j]->ptr;
robj *next = (j == c->argc-1) ? NULL : c->argv[j+1];
if ((a[0] == 'n' || a[0] == 'N') &&
(a[1] == 'x' || a[1] == 'X') && a[2] == '\0') {
flags |= REDIS_SET_NX;
} else if ((a[0] == 'x' || a[0] == 'X') &&
(a[1] == 'x' || a[1] == 'X') && a[2] == '\0') {
flags |= REDIS_SET_XX;
} else if ((a[0] == 'e' || a[0] == 'E') &&
(a[1] == 'x' || a[1] == 'X') && a[2] == '\0' && next) {
unit = UNIT_SECONDS;
expire = next;
j++;
} else if ((a[0] == 'p' || a[0] == 'P') &&
(a[1] == 'x' || a[1] == 'X') && a[2] == '\0' && next) {
unit = UNIT_MILLISECONDS;
expire = next;
j++;
} else {
addReply(c,shared.syntaxerr);
return;
}
}
c->argv[2] = tryObjectEncoding(c->argv[2]);
setGenericCommand(c,flags,c->argv[1],c->argv[2],expire,unit,NULL,NULL);
}
void pushGenericCommand(redisClient *c, int where) {
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
c->argv[2] = tryObjectEncoding(c->argv[2]);
if (lobj == NULL) {
if (handleClientsWaitingListPush(c,c->argv[1],c->argv[2])) {
addReply(c,shared.cone);
return;
}
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
} else {
if (lobj->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
if (handleClientsWaitingListPush(c,c->argv[1],c->argv[2])) {
touchWatchedKey(c->db,c->argv[1]);
addReply(c,shared.cone);
return;
}
}
listTypePush(lobj,c->argv[2],where);
addReplyLongLong(c,listTypeLength(lobj));
touchWatchedKey(c->db,c->argv[1]);
server.dirty++;
}
void pushGenericCommand(redisClient *c, int where) {
int j, addlen = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
int may_have_waiting_clients = (lobj == NULL);
if (lobj && lobj->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (may_have_waiting_clients) {
if (handleClientsWaitingListPush(c,c->argv[1],c->argv[j])) {
addlen++;
continue;
} else {
may_have_waiting_clients = 0;
}
}
if (!lobj) {
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
}
listTypePush(lobj,c->argv[j],where);
pushed++;
}
addReplyLongLong(c,addlen + (lobj ? listTypeLength(lobj) : 0));
if (pushed) signalModifiedKey(c->db,c->argv[1]);
server.dirty += pushed;
}
void zremCommand(redisClient *c) {
robj *zsetobj;
zset *zs;
dictEntry *de;
double curscore;
int deleted;
if ((zsetobj = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,zsetobj,REDIS_ZSET)) return;
zs = zsetobj->ptr;
c->argv[2] = tryObjectEncoding(c->argv[2]);
de = dictFind(zs->dict,c->argv[2]);
if (de == NULL) {
addReply(c,shared.czero);
return;
}
/* Delete from the skiplist */
curscore = *(double*)dictGetEntryVal(de);
deleted = zslDelete(zs->zsl,curscore,c->argv[2]);
redisAssert(deleted != 0);
/* Delete from the hash table */
dictDelete(zs->dict,c->argv[2]);
if (htNeedsResize(zs->dict)) dictResize(zs->dict);
if (dictSize(zs->dict) == 0) dbDelete(c->db,c->argv[1]);
touchWatchedKey(c->db,c->argv[1]);
server.dirty++;
addReply(c,shared.cone);
}
void zrankGenericCommand(redisClient *c, int reverse) {
robj *o;
zset *zs;
zskiplist *zsl;
dictEntry *de;
unsigned long rank;
double *score;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
checkType(c,o,REDIS_ZSET)) return;
zs = o->ptr;
zsl = zs->zsl;
c->argv[2] = tryObjectEncoding(c->argv[2]);
de = dictFind(zs->dict,c->argv[2]);
if (!de) {
addReply(c,shared.nullbulk);
return;
}
score = dictGetEntryVal(de);
rank = zslGetRank(zsl, *score, c->argv[2]);
if (rank) {
if (reverse) {
addReplyLongLong(c, zsl->length - rank);
} else {
addReplyLongLong(c, rank-1);
}
} else {
addReply(c,shared.nullbulk);
}
}
void getsetCommand(redisClient *c) {
if (getGenericCommand(c) == REDIS_ERR) return;
c->argv[2] = tryObjectEncoding(c->argv[2]);
setKey(c->db,c->argv[1],c->argv[2]);
notifyKeyspaceEvent(REDIS_NOTIFY_STRING,"set",c->argv[1],c->db->id);
server.dirty++;
}
void msetGenericCommand(redisClient *c, int nx) {
int j, busykeys = 0;
if ((c->argc % 2) == 0) {
addReplyError(c,"wrong number of arguments for MSET");
return;
}
/* Handle the NX flag. The MSETNX semantic is to return zero and don't
* set nothing at all if at least one already key exists. */
if (nx) {
for (j = 1; j < c->argc; j += 2) {
if (lookupKeyWrite(c->db,c->argv[j]) != NULL) {
busykeys++;
}
}
}
if (busykeys) {
addReply(c, shared.czero);
return;
}
for (j = 1; j < c->argc; j += 2) {
c->argv[j+1] = tryObjectEncoding(c->argv[j+1]);
dbReplace(c->db,c->argv[j],c->argv[j+1]);
incrRefCount(c->argv[j+1]);
removeExpire(c->db,c->argv[j]);
touchWatchedKey(c->db,c->argv[j]);
}
server.dirty += (c->argc-1)/2;
addReply(c, nx ? shared.cone : shared.ok);
}
void msetGenericCommand(redisClient *c, int nx) {
int j, busykeys = 0;
if ((c->argc % 2) == 0) {
addReplyError(c,"wrong number of arguments for MSET");
return;
}
/* Handle the NX flag. The MSETNX semantic is to return zero and don't
* set nothing at all if at least one already key exists. */
if (nx) {
for (j = 1; j < c->argc; j += 2) {
if (lookupKeyWrite(c->db,c->argv[j]) != NULL) {
busykeys++;
}
}
if (busykeys) {
addReply(c, shared.czero);
return;
}
}
for (j = 1; j < c->argc; j += 2) {
c->argv[j+1] = tryObjectEncoding(c->argv[j+1]);
setKey(c->db,c->argv[j],c->argv[j+1]);
notifyKeyspaceEvent(REDIS_NOTIFY_STRING,"set",c->argv[j],c->db->id);
}
server.dirty += (c->argc-1)/2;
addReply(c, nx ? shared.cone : shared.ok);
}
void pushGenericCommand(redisClient *c, int where) {
int j, waiting = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
int may_have_waiting_clients = (lobj == NULL);
if (lobj && lobj->type != REDIS_LIST) {//检查类型是否是list类型
addReply(c,shared.wrongtypeerr);
return;
}
if (may_have_waiting_clients) signalListAsReady(c,c->argv[1]);
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (!lobj) {//该键不存在 创建压缩列表
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);//该键添加到db中
}
listTypePush(lobj,c->argv[j],where);//把value添加列表中
pushed++;
}
addReplyLongLong(c, waiting + (lobj ? listTypeLength(lobj) : 0));
if (pushed) {
char *event = (where == REDIS_HEAD) ? "lpush" : "rpush";
signalModifiedKey(c->db,c->argv[1]);
notifyKeyspaceEvent(REDIS_NOTIFY_LIST,event,c->argv[1],c->db->id);//使用键空间通知
}
//改变最后一次保存的节点
server.dirty += pushed;
}
void getsetCommand(redisClient *c) {
uint16_t version = sdsversion(c->argv[1]->ptr);
if (getGenericCommand(c) == REDIS_ERR) return;
c->argv[2] = tryObjectEncoding(c->argv[2]);
if (c->returncode == REDIS_OK_NOT_EXIST) {
sdsversion_change(c->argv[1]->ptr, 0);
} else {
if(c->version_care && version != 0 && version != c->version) {
c->returncode = REDIS_ERR_VERSION_ERROR;
return;
} else {
sdsversion_change(c->argv[1]->ptr, c->version);
}
}
if(c->version_care) {
sdsversion_add(c->argv[1]->ptr, 1);
}
dbSuperReplace(c->db,c->argv[1],c->argv[2]);
incrRefCount(c->argv[2]);
c->db->dirty++;
if (c->expiretime > 0) {
setExpire(c->db,c->argv[1],c->expiretime);
} else if(c->expiretime == 0) {
removeXExpire(c->db, c->argv[1]);
}
c->returncode = REDIS_OK;
}
void saddCommand(redisClient *c) {
robj *set;
int j, added = 0;
set = lookupKeyWrite(c->db,c->argv[1]);
if (set == NULL) {
set = setTypeCreate(c->argv[2]);
dbAdd(c->db,c->argv[1],set);
} else {
if (set->type != REDIS_SET) {
addReply(c,shared.wrongtypeerr);
return;
}
}
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (setTypeAdd(set,c->argv[j])) added++;
}
if (added) {
signalModifiedKey(c->db,c->argv[1]);
notifyKeyspaceEvent(REDIS_NOTIFY_SET,"sadd",c->argv[1],c->db->id);
}
server.dirty += added;
addReplyLongLong(c,added);
}
void linsertCommand(redisClient *c) {
c->argv[4] = tryObjectEncoding(c->argv[4]);
if (strcasecmp(c->argv[2]->ptr,"after") == 0) {
pushxGenericCommand(c,c->argv[3],c->argv[4],REDIS_TAIL);
} else if (strcasecmp(c->argv[2]->ptr,"before") == 0) {
pushxGenericCommand(c,c->argv[3],c->argv[4],REDIS_HEAD);
} else {
addReply(c,shared.syntaxerr);
}
}
void debugCommand(client *c) {
if (!strcasecmp(c->argv[1]->ptr,"segfault")) {
*((char*)-1) = 'x';
} else if (!strcasecmp(c->argv[1]->ptr,"oom")) {
void *ptr = zmalloc(ULONG_MAX); /* Should trigger an out of memory. */
zfree(ptr);
addReply(c,shared.ok);
} else if (!strcasecmp(c->argv[1]->ptr,"assert")) {
if (c->argc >= 3) c->argv[2] = tryObjectEncoding(c->argv[2]);
serverAssertWithInfo(c,c->argv[0],1 == 2);
} else if (!strcasecmp(c->argv[1]->ptr,"flushall")) {
flushServerData();
addReply(c,shared.ok);
} else if (!strcasecmp(c->argv[1]->ptr,"loadaof")) {
flushServerData();
if (loadAppendOnlyFile(server.aof_filename) != C_OK) {
addReply(c,shared.err);
return;
}
serverLog(LL_WARNING,"Append Only File loaded by DEBUG LOADAOF");
addReply(c,shared.ok);
} else if (!strcasecmp(c->argv[1]->ptr,"sleep") && c->argc == 3) {
double dtime = strtod(c->argv[2]->ptr,NULL);
long long utime = dtime*1000000;
struct timespec tv;
tv.tv_sec = utime / 1000000;
tv.tv_nsec = (utime % 1000000) * 1000;
nanosleep(&tv, NULL);
addReply(c,shared.ok);
} else if (!strcasecmp(c->argv[1]->ptr,"error") && c->argc == 3) {
sds errstr = sdsnewlen("-",1);
errstr = sdscatsds(errstr,c->argv[2]->ptr);
errstr = sdsmapchars(errstr,"\n\r"," ",2); /* no newlines in errors. */
errstr = sdscatlen(errstr,"\r\n",2);
addReplySds(c,errstr);
} else if (!strcasecmp(c->argv[1]->ptr,"structsize") && c->argc == 2) {
sds sizes = sdsempty();
sizes = sdscatprintf(sizes,"bits:%d ",(sizeof(void*) == 8)?64:32);
sizes = sdscatprintf(sizes,"job:%d ", (int)sizeof(job));
sizes = sdscatprintf(sizes,"queue:%d ", (int)sizeof(queue));
sizes = sdscatprintf(sizes,"robj:%d ",(int)sizeof(robj));
sizes = sdscatprintf(sizes,"dictentry:%d ",(int)sizeof(dictEntry));
sizes = sdscatprintf(sizes,"sdshdr5:%d ",(int)sizeof(struct sdshdr5));
sizes = sdscatprintf(sizes,"sdshdr8:%d ",(int)sizeof(struct sdshdr8));
sizes = sdscatprintf(sizes,"sdshdr16:%d ",(int)sizeof(struct sdshdr16));
sizes = sdscatprintf(sizes,"sdshdr32:%d ",(int)sizeof(struct sdshdr32));
sizes = sdscatprintf(sizes,"sdshdr64:%d ",(int)sizeof(struct sdshdr64));
addReplyBulkSds(c,sizes);
} else {
addReplyErrorFormat(c, "Unknown DEBUG subcommand or wrong number of arguments for '%s'",
(char*)c->argv[1]->ptr);
}
}
void pushnGenericCommand(redisClient *c, int where) {
/* return_value must be null,otherwise it have memory leak */
c->returncode = REDIS_ERR;
robj *lobj = lookupKeyWriteWithVersion(c->db, c->argv[1], &c->version);
robj* key = c->argv[1];
if(lobj != NULL) {
if(checkType(c, lobj, REDIS_LIST)) {
c->returncode = REDIS_ERR_WRONG_TYPE_ERROR;
return;
}
uint16_t version = sdsversion(key->ptr);
if(c->version_care && version != 0 && version != c->version) {
c->returncode = REDIS_ERR_VERSION_ERROR;
return;
} else {
sdsversion_change(key->ptr, c->version);
}
} else {
sdsversion_change(key->ptr, 0);
}
if(c->version_care) {
sdsversion_add(key->ptr, 1);
}
c->return_value = (void*)zmalloc(sizeof(push_return_value));
if(c->return_value == NULL) {
c->returncode = REDIS_ERR_MEMORY_ALLOCATE_ERROR;
return;
}
int i = 2;
for(; i < c->argc; i++) {
if(lobj == NULL) {
c->argv[i] = tryObjectEncoding(c->argv[i]);
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
}
unsigned long list_len = listTypeLength(lobj);
if (list_len >= (unsigned long)(c->server->list_max_size)) {
break;
}
listTypePush(c,lobj,c->argv[i],where);
c->server->dirty++;
}
if (i != 2) {
dbUpdateKey(c->db, key);
EXPIRE_OR_NOT
}
void sismemberCommand(redisClient *c) {
robj *set;
if ((set = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,set,REDIS_SET)) return;
c->argv[2] = tryObjectEncoding(c->argv[2]);
if (setTypeIsMember(set,c->argv[2]))
addReply(c,shared.cone);
else
addReply(c,shared.czero);
}
void smoveCommand(redisClient *c) {
robj *srcset, *dstset, *ele;
srcset = lookupKeyWrite(c->db,c->argv[1]);
dstset = lookupKeyWrite(c->db,c->argv[2]);
ele = c->argv[3] = tryObjectEncoding(c->argv[3]);
/* If the source key does not exist return 0 */
if (srcset == NULL) {
addReply(c,shared.czero);
return;
}
/* If the source key has the wrong type, or the destination key
* is set and has the wrong type, return with an error. */
if (checkType(c,srcset,REDIS_SET) ||
(dstset && checkType(c,dstset,REDIS_SET))) return;
/* If srcset and dstset are equal, SMOVE is a no-op */
if (srcset == dstset) {
addReply(c,shared.cone);
return;
}
/* If the element cannot be removed from the src set, return 0. */
if (!setTypeRemove(srcset,ele)) {
addReply(c,shared.czero);
return;
}
notifyKeyspaceEvent(REDIS_NOTIFY_SET,"srem",c->argv[1],c->db->id);
/* Remove the src set from the database when empty */
if (setTypeSize(srcset) == 0) {
dbDelete(c->db,c->argv[1]);
notifyKeyspaceEvent(REDIS_NOTIFY_GENERIC,"del",c->argv[1],c->db->id);
}
signalModifiedKey(c->db,c->argv[1]);
signalModifiedKey(c->db,c->argv[2]);
server.dirty++;
/* Create the destination set when it doesn't exist */
if (!dstset) {
dstset = setTypeCreate(ele);
dbAdd(c->db,c->argv[2],dstset);
}
/* An extra key has changed when ele was successfully added to dstset */
if (setTypeAdd(dstset,ele)) {
server.dirty++;
notifyKeyspaceEvent(REDIS_NOTIFY_SET,"sadd",c->argv[2],c->db->id);
}
addReply(c,shared.cone);
}
void hashTypeConvertZiplist(robj *o, int enc) {
logicErrorExpr(o->encoding == REDIS_ENCODING_ZIPLIST, "Invalid type");
if (enc == REDIS_ENCODING_ZIPLIST) {
/* Nothing to do... */
} else if (enc == REDIS_ENCODING_HT) {
hashTypeIterator *hi;
dict *dict;
int ret;
hi = hashTypeInitIterator(o);
dict = dictCreate(&hashDictType, NULL);
while (hashTypeNext(hi) != REDIS_ERR) {
robj *field, *value;
field = hashTypeCurrentObject(hi, REDIS_HASH_KEY);
field = tryObjectEncoding(field);
value = hashTypeCurrentObject(hi, REDIS_HASH_VALUE);
value = tryObjectEncoding(value);
ret = dictAdd(dict, field, value);
if (ret != DICT_OK) {
// redisLogHexDump(REDIS_WARNING,"ziplist with dup elements dump",
// o->ptr,ziplistBlobLen(o->ptr));
logicErrorExpr(ret == DICT_OK, "Never happend");
}
}
hashTypeReleaseIterator(hi);
zfree(o->ptr);
o->encoding = REDIS_ENCODING_HT;
o->ptr = dict;
} else {
logicError("Unknown hash encoding");
}
}
// LINSERT key BEFORE|AFTER pivot(基准值) value
// LINSERT命令的实现
void linsertCommand(client *c) {
//对基准值进行优化编码
c->argv[4] = tryObjectEncoding(c->argv[4]);
//比较where字符串，忽略大小写
if (strcasecmp(c->argv[2]->ptr,"after") == 0) {
//如果是after，则是在基准值的后插入
pushxGenericCommand(c,c->argv[3],c->argv[4],LIST_TAIL);
} else if (strcasecmp(c->argv[2]->ptr,"before") == 0) {
//如果是before，则是在基准值的前插入
pushxGenericCommand(c,c->argv[3],c->argv[4],LIST_HEAD);
} else {
addReply(c,shared.syntaxerr); //否则发送语法错误信息
}
}
void sremCommand(redisClient *c) {
robj *set;
if ((set = lookupKeyWriteOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,set,REDIS_SET)) return;
c->argv[2] = tryObjectEncoding(c->argv[2]);
if (setTypeRemove(set,c->argv[2])) {
if (setTypeSize(set) == 0) dbDelete(c->db,c->argv[1]);
touchWatchedKey(c->db,c->argv[1]);
server.dirty++;
addReply(c,shared.cone);
} else {
addReply(c,shared.czero);
}
}
void lremCommand(redisClient *c) {
robj *subject, *obj;
obj = c->argv[3] = tryObjectEncoding(c->argv[3]);
long toremove;
long removed = 0;
listTypeEntry entry;
int slotnum = keyHashSlot(c->argv[1]->ptr, sdslen(c->argv[1]->ptr));
if ((getLongFromObjectOrReply(c, c->argv[2], &toremove, NULL) != REDIS_OK))
return;
subject = lookupKeyWriteOrReply(c,c->argv[1],shared.czero,slotnum);
if (subject == NULL || checkType(c,subject,REDIS_LIST)) return;
/* Make sure obj is raw when we're dealing with a ziplist */
if (subject->encoding == REDIS_ENCODING_ZIPLIST)
obj = getDecodedObject(obj);
listTypeIterator *li;
if (toremove < 0) {
toremove = -toremove;
li = listTypeInitIterator(subject,-1,REDIS_HEAD);
} else {
li = listTypeInitIterator(subject,0,REDIS_TAIL);
}
while (listTypeNext(li,&entry)) {
if (listTypeEqual(&entry,obj)) {
listTypeDelete(&entry);
server.dirty++;
removed++;
if (toremove && removed == toremove) break;
}
}
listTypeReleaseIterator(li);
/* Clean up raw encoded object */
if (subject->encoding == REDIS_ENCODING_ZIPLIST)
decrRefCount(obj);
if (listTypeLength(subject) == 0) dbDelete(c->db,c->argv[1],slotnum);
addReplyLongLong(c,removed);
if (removed) signalModifiedKey(c->db,c->argv[1],slotnum);
}
void pushGenericCommand(redisClient *c, int where) {
int j, waiting = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
int may_have_waiting_clients = (lobj == NULL);
if (lobj && lobj->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (may_have_waiting_clients) {
if (handleClientsWaitingListPush(c,c->argv[1],c->argv[j])) {
waiting++;
continue;
} else {
may_have_waiting_clients = 0;
}
}
if (!lobj) {
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
}
listTypePush(lobj,c->argv[j],where);
pushed++;
}
addReplyLongLong(c, waiting + (lobj ? listTypeLength(lobj) : 0));
if (pushed) signalModifiedKey(c->db,c->argv[1]);
server.dirty += pushed;
/* Alter the replication of the command accordingly to the number of
* list elements delivered to clients waiting into a blocking operation.
* We do that only if there were waiting clients, and only if still some
* element was pushed into the list (othewise dirty is 0 and nothign will
* be propagated). */
if (waiting && pushed) {
/* CMD KEY a b C D E */
for (j = 0; j < waiting; j++) decrRefCount(c->argv[j+2]);
memmove(c->argv+2,c->argv+2+waiting,sizeof(robj*)*pushed);
c->argc -= waiting;
}
}
void getsetCommand(redisClient *c) {
if (getGenericCommand(c) == REDIS_ERR) return;
#ifdef AUTH_FEATURE
/* Check mod permissions */
if (authCheckModOrReply(c) == REDIS_ERR)
return;
/* Check path permissions */
if (authCheckPathOrReply(c, c->argv[2]) == REDIS_ERR)
return;
#endif
c->argv[2] = tryObjectEncoding(c->argv[2]);
dbReplace(c->db,c->argv[1],c->argv[2]);
incrRefCount(c->argv[2]);
touchWatchedKey(c->db,c->argv[1]);
server.dirty++;
removeExpire(c->db,c->argv[1]);
}
void zscoreCommand(redisClient *c) {
robj *o;
zset *zs;
dictEntry *de;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.nullbulk)) == NULL ||
checkType(c,o,REDIS_ZSET)) return;
zs = o->ptr;
c->argv[2] = tryObjectEncoding(c->argv[2]);
de = dictFind(zs->dict,c->argv[2]);
if (!de) {
addReply(c,shared.nullbulk);
} else {
double *score = dictGetEntryVal(de);
addReplyDouble(c,*score);
}
}
void lsetCommand(redisClient *c) {
int slotnum = keyHashSlot(c->argv[1]->ptr, sdslen(c->argv[1]->ptr));
robj *o = lookupKeyWriteOrReply(c,c->argv[1],shared.nokeyerr,slotnum);
if (o == NULL || checkType(c,o,REDIS_LIST)) return;
long index;
robj *value = (c->argv[3] = tryObjectEncoding(c->argv[3]));
if ((getLongFromObjectOrReply(c, c->argv[2], &index, NULL) != REDIS_OK))
return;
listTypeTryConversion(o,value);
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *p, *zl = o->ptr;
p = ziplistIndex(zl,index);
if (p == NULL) {
addReply(c,shared.outofrangeerr);
} else {
o->ptr = ziplistDelete(o->ptr,&p);
value = getDecodedObject(value);
o->ptr = ziplistInsert(o->ptr,p,value->ptr,sdslen(value->ptr));
decrRefCount(value);
addReply(c,shared.ok);
signalModifiedKey(c->db,c->argv[1],slotnum);
notifyKeyspaceEvent(REDIS_NOTIFY_LIST,"lset",c->argv[1],c->db->id);
server.dirty++;
}
} else if (o->encoding == REDIS_ENCODING_LINKEDLIST) {
listNode *ln = listIndex(o->ptr,index);
if (ln == NULL) {
addReply(c,shared.outofrangeerr);
} else {
decrRefCount((robj*)listNodeValue(ln));
listNodeValue(ln) = value;
incrRefCount(value);
addReply(c,shared.ok);
signalModifiedKey(c->db,c->argv[1],slotnum);
notifyKeyspaceEvent(REDIS_NOTIFY_LIST,"lset",c->argv[1],c->db->id);
server.dirty++;
}
} else {
redisPanic("Unknown list encoding");
}
}
//PUSH命令的底层实现，where保存push的位置
void pushGenericCommand(client *c, int where) {
int j, waiting = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]); //以写操作读取key对象的value
//如果value对象不是列表类型则发送错误信息，返回
if (lobj && lobj->type != OBJ_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
//从第一个value开始遍历
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]); //将value对象优化编码
//如果没有找到key对象
if (!lobj) {
//创建一个quicklist类型的对象
lobj = createQuicklistObject();
//设置ziplist最大的长度和压缩程度，配置文件指定
quicklistSetOptions(lobj->ptr, server.list_max_ziplist_size,
server.list_compress_depth);
//将新的key对象和优化编码过的value对象进行组成键值对
dbAdd(c->db,c->argv[1],lobj);
}
//在where推入一个value对象
listTypePush(lobj,c->argv[j],where);
pushed++; //更新计数器
}
//发送当前列表中元素的个数
addReplyLongLong(c, waiting + (lobj ? listTypeLength(lobj) : 0));
//如果推入元素成功
if (pushed) {
char *event = (where == LIST_HEAD) ? "lpush" : "rpush";
//当数据库的键被改动，则会调用该函数发送信号
signalModifiedKey(c->db,c->argv[1]);
//发送"lpush"或"rpush"事件通知
notifyKeyspaceEvent(NOTIFY_LIST,event,c->argv[1],c->db->id);
}
server.dirty += pushed; //更新脏键
}
void appendCommand(redisClient *c) {
int retval;
size_t totlen;
robj *o;
o = lookupKeyWrite(c->db,c->argv[1]);
c->argv[2] = tryObjectEncoding(c->argv[2]);
if (o == NULL) {
/* Create the key */
retval = dbAdd(c->db,c->argv[1],c->argv[2]);
incrRefCount(c->argv[2]);
totlen = stringObjectLen(c->argv[2]);
} else {
if (o->type != REDIS_STRING) {
addReply(c,shared.wrongtypeerr);
return;
}
/* If the object is specially encoded or shared we have to make
* a copy */
if (o->refcount != 1 || o->encoding != REDIS_ENCODING_RAW) {
robj *decoded = getDecodedObject(o);
o = createStringObject(decoded->ptr, sdslen(decoded->ptr));
decrRefCount(decoded);
dbReplace(c->db,c->argv[1],o);
}
/* APPEND! */
if (c->argv[2]->encoding == REDIS_ENCODING_RAW) {
o->ptr = sdscatlen(o->ptr,
c->argv[2]->ptr, sdslen(c->argv[2]->ptr));
} else {
o->ptr = sdscatprintf(o->ptr, "%ld",
(unsigned long) c->argv[2]->ptr);
}
totlen = sdslen(o->ptr);
}
touchWatchedKey(c->db,c->argv[1]);
server.dirty++;
addReplyLongLong(c,totlen);
}
/* zset access is mostly a copy/paste from zscoreCommand() */
double zsetScore(robj *zobj, robj *member, double *score) {
if (!zobj || !member)
return false;
if (zobj->encoding == REDIS_ENCODING_ZIPLIST) {
if (zzlFind(zobj->ptr, member, score) == NULL)
return false;
} else if (zobj->encoding == REDIS_ENCODING_SKIPLIST) {
zset *zs = zobj->ptr;
dictEntry *de;
member = tryObjectEncoding(member);
de = dictFind(zs->dict, member);
if (de != NULL) {
*score = *(double *)dictGetVal(de);
} else
return false;
} else {
return false;
}
return true;
}
void pushGenericCommand(redisClient *c, int where) {
int j, waiting = 0, pushed = 0;
robj *lobj = lookupKeyWrite(c->db,c->argv[1]);
if (lobj && lobj->type != REDIS_LIST) {
addReply(c,shared.wrongtypeerr);
return;
}
for (j = 2; j < c->argc; j++) {
c->argv[j] = tryObjectEncoding(c->argv[j]);
if (!lobj) {
lobj = createZiplistObject();
dbAdd(c->db,c->argv[1],lobj);
}
listTypePush(lobj,c->argv[j],where);
pushed++;
}
addReplyLongLong(c, waiting + (lobj ? listTypeLength(lobj) : 0));
if (pushed) {
signalModifiedKey(c->db,c->argv[1]);
}
}
void saddCommand(redisClient *c) {
robj *set;
set = lookupKeyWrite(c->db,c->argv[1]);
c->argv[2] = tryObjectEncoding(c->argv[2]);
if (set == NULL) {
set = setTypeCreate(c->argv[2]);
dbAdd(c->db,c->argv[1],set);
} else {
if (set->type != REDIS_SET) {
addReply(c,shared.wrongtypeerr);
return;
}
}
if (setTypeAdd(set,c->argv[2])) {
touchWatchedKey(c->db,c->argv[1]);
server.dirty++;
addReply(c,shared.cone);
} else {
addReply(c,shared.czero);
}
}
