+static memcached_return binary_incr_decr(memcached_st *ptr, uint8_t cmd,
+ const char *key, size_t key_length,
+ uint32_t offset, uint64_t *value)
+{
+ unsigned int server_key;
+
+ unlikely (key_length == 0)
+ return MEMCACHED_NO_KEY_PROVIDED;
+
+ unlikely (ptr->hosts == NULL || ptr->number_of_hosts == 0)
+ return MEMCACHED_NO_SERVERS;
+
+ if ((ptr->flags & MEM_VERIFY_KEY) && (memcachd_key_test((char **)&key, &key_length, 1) == MEMCACHED_BAD_KEY_PROVIDED))
+ return MEMCACHED_BAD_KEY_PROVIDED;
+
+ server_key= memcached_generate_hash(ptr, key, key_length);
+
+ protocol_binary_request_incr request= {.bytes= {0}};
+
+ request.message.header.request.magic= PROTOCOL_BINARY_REQ;
+ request.message.header.request.opcode= cmd;
+ request.message.header.request.keylen= htons((uint16_t)key_length);
+ request.message.header.request.extlen= 20;
+ request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
+ request.message.header.request.bodylen= htonl(key_length + request.message.header.request.extlen);
+ request.message.body.delta= htonll(offset);
+
+ /* TODO: The binary protocol allows you to specify initial and expiry time */
+ if ((memcached_do(&ptr->hosts[server_key], request.bytes,
+ sizeof(request.bytes), 0)!=MEMCACHED_SUCCESS) ||
+ (memcached_io_write(&ptr->hosts[server_key], key, key_length, 1) == -1))
+ {
+ memcached_io_reset(&ptr->hosts[server_key]);
+ return MEMCACHED_WRITE_FAILURE;
+ }
+
+ return memcached_response(&ptr->hosts[server_key], (char*)value, sizeof(*value), NULL);
+}
+