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
  19   memset(buffer, 0, buffer_length);
  20   send_length= 0;
  21
  22   for (x= 0; x <= ptr->stack_responses; x++)
  23   {
  24     buffer_ptr= buffer;
  25     while (1)
  26     {
  27       unsigned int read_length;
  28
  29       read_length= memcached_io_read(ptr, server_key,
  30                                      buffer_ptr, 1);
  31
  32       if (read_length != 1)
  33         return  MEMCACHED_UNKNOWN_READ_FAILURE;
  34
  35       if (*buffer_ptr == '\n')
  36         break;
  37       else
  38         buffer_ptr++;
  39     }
  40   }
  41   ptr->stack_responses= 0;
  42
  43   switch(buffer[0])
  44   {
  45   case 'V': /* VALUE */
  46     return MEMCACHED_SUCCESS;
  47   case 'O': /* OK */
  48     return MEMCACHED_SUCCESS;
  49   case 'S': /* STORED STATS SERVER_ERROR */
  50     {
  51       if (buffer[2] == 'A') /* STORED STATS */
  52         return MEMCACHED_STAT;
  53       else if (buffer[1] == 'E')
  54         return MEMCACHED_SERVER_ERROR;
  55       else if (buffer[1] == 'T')
  56         return MEMCACHED_STORED;
  57       else
  58         return MEMCACHED_UNKNOWN_READ_FAILURE;
  59     }
  60   case 'D': /* DELETED */
  61     return MEMCACHED_DELETED;
  62   case 'N': /* NOT_FOUND */
  63     {
  64       if (buffer[4] == 'F')
  65         return MEMCACHED_NOTFOUND;
  66       else if (buffer[4] == 'S')
  67         return MEMCACHED_NOTSTORED;
  68       else
  69         return MEMCACHED_UNKNOWN_READ_FAILURE;
  70     }
  71   case 'E': /* PROTOCOL ERROR or END */
  72     {
  73       if (buffer[1] == 'N')
  74         return MEMCACHED_END;
  75       else if (buffer[1] == 'R')
  76         return MEMCACHED_PROTOCOL_ERROR;
  77       else
  78         return MEMCACHED_UNKNOWN_READ_FAILURE;
  79     }
  80   case 'C': /* CLIENT ERROR */
  81     return MEMCACHED_CLIENT_ERROR;
  82   default:
  83     return MEMCACHED_UNKNOWN_READ_FAILURE;
  84
  85   }
  86
  87   return MEMCACHED_SUCCESS;
  88 }