git.m6w6.name Git - awesomized/libmemcached/blob - lib/memcached_response.c

   1 /*
   2   Memcached library
   3
   4   memcached_response() is used to determine the return result
   5   from an issued command.
   6 */
   7
   8 #include "common.h"
   9 #include "memcached_io.h"
  10
  11 memcached_return memcached_response(memcached_st *ptr,
  12                                     char *buffer, size_t buffer_length,
  13                                     unsigned int server_key)
  14 {
  15   unsigned int x;
  16   size_t send_length;
  17   char *buffer_ptr;
  18   unsigned int max_messages;
  19
  20
  21   memset(buffer, 0, buffer_length);
  22   send_length= 0;
  23
  24   max_messages= memcached_server_response_count(ptr, server_key);
  25   for (x= 0; x <=  max_messages; x++)
  26   {
  27     buffer_ptr= buffer;
  28
  29     while (1)
  30     {
  31       unsigned int read_length;
  32
  33       read_length= memcached_io_read(ptr, server_key,
  34                                      buffer_ptr, 1);
  35
  36       if (read_length != 1)
  37         return  MEMCACHED_UNKNOWN_READ_FAILURE;
  38
  39       if (*buffer_ptr == '\n')
  40         break;
  41       else
  42         buffer_ptr++;
  43     }
  44
  45     if (memcached_server_response_count(ptr, server_key))
  46       memcached_server_response_decrement(ptr, server_key);
  47   }
  48
  49   switch(buffer[0])
  50   {
  51   case 'V': /* VALUE */
  52     return MEMCACHED_SUCCESS;
  53   case 'O': /* OK */
  54     return MEMCACHED_SUCCESS;
  55   case 'S': /* STORED STATS SERVER_ERROR */
  56     {
  57       if (buffer[2] == 'A') /* STORED STATS */
  58         return MEMCACHED_STAT;
  59       else if (buffer[1] == 'E')
  60         return MEMCACHED_SERVER_ERROR;
  61       else if (buffer[1] == 'T')
  62         return MEMCACHED_STORED;
  63       else
  64         return MEMCACHED_UNKNOWN_READ_FAILURE;
  65     }
  66   case 'D': /* DELETED */
  67     return MEMCACHED_DELETED;
  68   case 'N': /* NOT_FOUND */
  69     {
  70       if (buffer[4] == 'F')
  71         return MEMCACHED_NOTFOUND;
  72       else if (buffer[4] == 'S')
  73         return MEMCACHED_NOTSTORED;
  74       else
  75         return MEMCACHED_UNKNOWN_READ_FAILURE;
  76     }
  77   case 'E': /* PROTOCOL ERROR or END */
  78     {
  79       if (buffer[1] == 'N')
  80         return MEMCACHED_END;
  81       else if (buffer[1] == 'R')
  82         return MEMCACHED_PROTOCOL_ERROR;
  83       else
  84         return MEMCACHED_UNKNOWN_READ_FAILURE;
  85     }
  86   case 'C': /* CLIENT ERROR */
  87     return MEMCACHED_CLIENT_ERROR;
  88   default:
  89     return MEMCACHED_UNKNOWN_READ_FAILURE;
  90
  91   }
  92
  93   return MEMCACHED_SUCCESS;
  94 }