MEMCACHED_BAD_KEY_PROVIDED has been added as an error type. When libmemcached
[m6w6/libmemcached] / lib / memcached_delete.c
1 #include "common.h"
2
3 memcached_return memcached_delete(memcached_st *ptr, char *key, size_t key_length,
4 time_t expiration)
5 {
6 return memcached_delete_by_key(ptr, key, key_length,
7 key, key_length, expiration);
8 }
9
10 memcached_return memcached_delete_by_key(memcached_st *ptr,
11 char *master_key, size_t master_key_length,
12 char *key, size_t key_length,
13 time_t expiration)
14 {
15 char to_write;
16 size_t send_length;
17 memcached_return rc;
18 char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
19 unsigned int server_key;
20
21 LIBMEMCACHED_MEMCACHED_DELETE_START();
22
23 if (key_length == 0)
24 return MEMCACHED_NO_KEY_PROVIDED;
25
26 if (ptr->hosts == NULL || ptr->number_of_hosts == 0)
27 return MEMCACHED_NO_SERVERS;
28
29 server_key= memcached_generate_hash(ptr, master_key, master_key_length);
30
31 if (expiration)
32 send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
33 "delete %.*s %llu\r\n", (int)key_length, key,
34 (unsigned long long)expiration);
35 else
36 send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
37 "delete %.*s\r\n", (int)key_length, key);
38
39 if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE)
40 {
41 rc= MEMCACHED_WRITE_FAILURE;
42 goto error;
43 }
44
45 to_write= (ptr->flags & MEM_BUFFER_REQUESTS) ? 0 : 1;
46
47 rc= memcached_do(&ptr->hosts[server_key], buffer, send_length, to_write);
48 if (rc != MEMCACHED_SUCCESS)
49 goto error;
50
51 if ((ptr->flags & MEM_BUFFER_REQUESTS))
52 {
53 rc= MEMCACHED_BUFFERED;
54 }
55 else
56 {
57 rc= memcached_response(&ptr->hosts[server_key], buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
58 if (rc == MEMCACHED_DELETED)
59 rc= MEMCACHED_SUCCESS;
60 }
61
62 error:
63 LIBMEMCACHED_MEMCACHED_DELETE_END();
64 return rc;
65 }