git.m6w6.name Git - m6w6/libmemcached/blob - lib/memcached_auto.c

   1 #include <memcached.h>
   2
   3 static memcached_return memcached_auto(memcached_st *ptr,
   4                                        char *verb,
   5                                        char *key, size_t key_length,
   6                                        unsigned int offset,
   7                                        unsigned int *value)
   8 {
   9   size_t send_length;
  10   memcached_return rc;
  11   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  12   unsigned int server_key;
  13
  14   rc= memcached_connect(ptr);
  15
  16   if (rc != MEMCACHED_SUCCESS)
  17     return rc;
  18
  19   server_key= memcached_generate_hash(key, key_length) % ptr->number_of_hosts;
  20
  21   send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
  22                         "%s %.*s %u\r\n", verb,
  23                         key_length, key,
  24                         offset);
  25
  26   if ((send(ptr->hosts[server_key].fd, buffer, send_length, 0) == -1))
  27   {
  28     fprintf(stderr, "failed set on %.*s TCP\n", key_length+1, key);
  29
  30     return MEMCACHED_WRITE_FAILURE;
  31   }
  32
  33   memset(buffer, 0, MEMCACHED_DEFAULT_COMMAND_SIZE);
  34   send_length= read(ptr->hosts[server_key].fd, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE);
  35
  36   if (!memcmp(buffer, "ERROR\r\n", MEMCACHED_DEFAULT_COMMAND_SIZE))
  37   {
  38     *value= 0;
  39     rc= MEMCACHED_PROTOCOL_ERROR;
  40   }
  41   else if (!memcmp(buffer, "NOT_FOUND\r\n", MEMCACHED_DEFAULT_COMMAND_SIZE))
  42   {
  43     *value= 0;
  44     rc= MEMCACHED_NOTFOUND;
  45   }
  46   else
  47   {
  48     *value= strtol(buffer, (char **)NULL, 10);
  49     rc= MEMCACHED_SUCCESS;
  50   }
  51
  52   return rc;
  53 }
  54
  55 memcached_return memcached_increment(memcached_st *ptr,
  56                                      char *key, size_t key_length,
  57                                      unsigned int offset,
  58                                      unsigned int *value)
  59 {
  60   return memcached_auto(ptr, "incr", key, key_length, offset, value);
  61 }
  62
  63 memcached_return memcached_decrement(memcached_st *ptr,
  64                                      char *key, size_t key_length,
  65                                      unsigned int offset,
  66                                      unsigned int *value)
  67 {
  68   return memcached_auto(ptr, "decr", key, key_length, offset, value);
  69 }