/* A non copy-on-write friendly but higher level version of hashTypeCurrent*()
* that returns an object with incremented refcount (or a new object). It is up
* to the caller to decrRefCount() the object if no reference is retained. */
robj *hashTypeCurrentObject(hashTypeIterator *hi, int what) {
robj *dst;
if (hi->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *vstr = NULL;
unsigned int vlen = UINT_MAX;
long long vll = LLONG_MAX;
hashTypeCurrentFromZiplist(hi, what, &vstr, &vlen, &vll);
if (vstr) {
dst = createStringObject((char*)vstr, vlen);
} else {
dst = createStringObjectFromLongLong(vll);
}
} else if (hi->encoding == REDIS_ENCODING_HT) {
hashTypeCurrentFromHashTable(hi, what, &dst);
incrRefCount(dst);
} else {
logicError("Unknown hash encoding");
}
return dst;
}
/* Write either the key or the value of the currently selected item of an hash.
* The 'hi' argument passes a valid Redis hash iterator.
* The 'what' filed specifies if to write a key or a value and can be
* either REDIS_HASH_KEY or REDIS_HASH_VALUE.
*
* The function returns 0 on error, non-zero on success. */
static int rioWriteHashIteratorCursor(rio *r, hashTypeIterator *hi, int what) {
if (hi->encoding == REDIS_ENCODING_ZIPLIST) {
unsigned char *vstr = NULL;
unsigned int vlen = UINT_MAX;
long long vll = LLONG_MAX;
hashTypeCurrentFromZiplist(hi, what, &vstr, &vlen, &vll);
if (vstr) {
return rioWriteBulkString(r, (char*)vstr, vlen);
} else {
return rioWriteBulkLongLong(r, vll);
}
} else if (hi->encoding == REDIS_ENCODING_HT) {
robj *value;
hashTypeCurrentFromHashTable(hi, what, &value);
return rioWriteBulkObject(r, value);
}
redisPanic("Unknown hash encoding");
return 0;
}
