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rename vars, move arguments, add comments

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This commit is contained in:
Pieter Noordhuis 2010-06-11 13:06:03 +02:00
parent 1240552da9
commit bcfb387694
1 changed files with 29 additions and 21 deletions
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50
redis.c
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@ -5088,26 +5088,29 @@ static robj *listTypeGet(listTypeEntry *entry) {
return value;
}
static void listTypeInsert(robj *subject, listTypeEntry *old_entry, robj *new_obj, int where) {
listTypeTryConversion(subject,new_obj);
if (subject->encoding == REDIS_ENCODING_ZIPLIST) {
static void listTypeInsert(listTypeEntry *entry, robj *value, int where) {
robj *subject = entry->li->subject;
if (entry->li->encoding == REDIS_ENCODING_ZIPLIST) {
if (where == REDIS_TAIL) {
unsigned char *next = ziplistNext(subject->ptr,old_entry->zi);
unsigned char *next = ziplistNext(subject->ptr,entry->zi);
/* When we insert after the current element, but the current element
* is the tail of the list, we need to do a push. */
if (next == NULL) {
listTypePush(subject,new_obj,REDIS_TAIL);
subject->ptr = ziplistPush(subject->ptr,value->ptr,sdslen(value->ptr),REDIS_TAIL);
} else {
subject->ptr = ziplistInsert(subject->ptr,next,new_obj->ptr,sdslen(new_obj->ptr));
subject->ptr = ziplistInsert(subject->ptr,next,value->ptr,sdslen(value->ptr));
}
} else {
subject->ptr = ziplistInsert(subject->ptr,old_entry->zi,new_obj->ptr,sdslen(new_obj->ptr));
subject->ptr = ziplistInsert(subject->ptr,entry->zi,value->ptr,sdslen(value->ptr));
}
} else if (subject->encoding == REDIS_ENCODING_LIST) {
} else if (entry->li->encoding == REDIS_ENCODING_LIST) {
if (where == REDIS_TAIL) {
listInsertNode(subject->ptr,old_entry->ln,new_obj,AL_START_TAIL);
listInsertNode(subject->ptr,entry->ln,value,AL_START_TAIL);
} else {
listInsertNode(subject->ptr,old_entry->ln,new_obj,AL_START_HEAD);
listInsertNode(subject->ptr,entry->ln,value,AL_START_HEAD);
}
incrRefCount(new_obj);
incrRefCount(value);
} else {
redisPanic("Unknown list encoding");
}
@ -5205,29 +5208,34 @@ static void rpushCommand(redisClient *c) {
pushGenericCommand(c,REDIS_TAIL);
}
static void pushxGenericCommand(redisClient *c, int where, robj *old_obj, robj *new_obj) {
static void pushxGenericCommand(redisClient *c, robj *refval, robj *val, int where) {
robj *subject;
listTypeIterator *iter;
listTypeEntry entry;
if ((subject = lookupKeyReadOrReply(c,c->argv[1],shared.czero)) == NULL ||
checkType(c,subject,REDIS_LIST)) return;
if (handleClientsWaitingListPush(c,c->argv[1],new_obj)) {
if (handleClientsWaitingListPush(c,c->argv[1],val)) {
addReply(c,shared.cone);
return;
}
if (old_obj != NULL) {
if (refval != NULL) {
/* Note: we expect refval to be string-encoded because it is *not* the
* last argument of the multi-bulk LINSERT. */
redisAssert(refval->encoding == REDIS_ENCODING_RAW);
/* Seek refval from head to tail */
iter = listTypeInitIterator(subject,0,REDIS_TAIL);
while (listTypeNext(iter,&entry)) {
if (listTypeEqual(&entry,old_obj)) {
listTypeInsert(subject,&entry,new_obj,where);
if (listTypeEqual(&entry,refval)) {
listTypeInsert(&entry,val,where);
break;
}
}
listTypeReleaseIterator(iter);
} else {
listTypePush(subject,new_obj,where);
listTypePush(subject,val,where);
}
server.dirty++;
@ -5235,18 +5243,18 @@ static void pushxGenericCommand(redisClient *c, int where, robj *old_obj, robj *
}
static void lpushxCommand(redisClient *c) {
pushxGenericCommand(c,REDIS_HEAD,NULL,c->argv[2]);
pushxGenericCommand(c,NULL,c->argv[2],REDIS_HEAD);
}
static void rpushxCommand(redisClient *c) {
pushxGenericCommand(c,REDIS_TAIL,NULL,c->argv[2]);
pushxGenericCommand(c,NULL,c->argv[2],REDIS_TAIL);
}
static void linsertCommand(redisClient *c) {
if (strcasecmp(c->argv[2]->ptr,"after") == 0) {
pushxGenericCommand(c,REDIS_TAIL,c->argv[3],c->argv[4]);
pushxGenericCommand(c,c->argv[3],c->argv[4],REDIS_TAIL);
} else if (strcasecmp(c->argv[2]->ptr,"before") == 0) {
pushxGenericCommand(c,REDIS_HEAD,c->argv[3],c->argv[4]);
pushxGenericCommand(c,c->argv[3],c->argv[4],REDIS_HEAD);
} else {
addReply(c,shared.syntaxerr);
}