fluencelabs/redis
1
0
Fork 0
mirror of https://github.com/fluencelabs/redis synced 2025-06-19 20:21:21 +00:00
Code Issues Projects Releases Wiki Activity

LRANGE converted into a COW friendly command. Some refactoring, comment, and new addReply*() family function added in the process.

Browse Source
This commit is contained in:
antirez
2010-12-07 16:33:13 +01:00
parent bbac56c2f8
commit d51ebef509
4 changed files with 60 additions and 15 deletions
Download Patch File Download Diff File Expand all files Collapse all files

36
src/t_list.c
View File

@ -472,12 +472,11 @@ void rpopCommand(redisClient *c) {
}
void lrangeCommand(redisClient *c) {
robj *o, *value;
robj *o;
int start = atoi(c->argv[2]->ptr);
int end = atoi(c->argv[3]->ptr);
int llen;
int rangelen, j;
listTypeEntry entry;
int rangelen;
if ((o = lookupKeyReadOrReply(c,c->argv[1],shared.emptymultibulk)) == NULL
|| checkType(c,o,REDIS_LIST)) return;
@ -499,14 +498,31 @@ void lrangeCommand(redisClient *c) {
/* Return the result in form of a multi-bulk reply */
addReplyMultiBulkLen(c,rangelen);
listTypeIterator *li = listTypeInitIterator(o,start,REDIS_TAIL);
for (j = 0; j < rangelen; j++) {
redisAssert(listTypeNext(li,&entry));
value = listTypeGet(&entry);
addReplyBulk(c,value);
decrRefCount(value);
if (o->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *p = ziplistIndex(o->ptr,start);
unsigned char *vstr;
unsigned int vlen;
long long vlong;
while(rangelen--) {
ziplistGet(p,&vstr,&vlen,&vlong);
if (vstr) {
addReplyBulkCBuffer(c,vstr,vlen);
} else {
addReplyBulkLongLong(c,vlong);
}
p = ziplistNext(o->ptr,p);
}
} else if (o->encoding == REDIS_ENCODING_LINKEDLIST) {
listNode *ln = listIndex(o->ptr,start);
while(rangelen--) {
addReplyBulk(c,ln->value);
ln = ln->next;
}
} else {
redisPanic("List encoding is not LINKEDLIST nor ZIPLIST!");
}
listTypeReleaseIterator(li);
}
void ltrimCommand(redisClient *c) {