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   size_t send_length;
  16   char *buffer_ptr;
  17
  18   memset(buffer, 0, buffer_length);
  19   send_length= 0;
  20
  21   buffer_ptr= buffer;
  22   while (1)
  23   {
  24     unsigned int read_length;
  25
  26     read_length= memcached_io_read(ptr, server_key,
  27                                    buffer_ptr, 1);
  28
  29     if (read_length != 1)
  30       return  MEMCACHED_UNKNOWN_READ_FAILURE;
  31
  32     if (*buffer_ptr == '\n')
  33       break;
  34     else
  35       buffer_ptr++;
  36   }
  37
  38   switch(buffer[0])
  39   {
  40   case 'V': /* VALUE */
  41     return MEMCACHED_SUCCESS;
  42   case 'O': /* OK */
  43     return MEMCACHED_SUCCESS;
  44   case 'S': /* STORED STATS SERVER_ERROR */
  45     {
  46       if (buffer[2] == 'A') /* STORED STATS */
  47         return MEMCACHED_SUCCESS;
  48       else if (buffer[1] == 'E')
  49         return MEMCACHED_SERVER_ERROR;
  50       else if (buffer[1] == 'T')
  51         return MEMCACHED_STORED;
  52       else
  53         return MEMCACHED_UNKNOWN_READ_FAILURE;
  54     }
  55   case 'D': /* DELETED */
  56     return MEMCACHED_DELETED;
  57   case 'N': /* NOT_FOUND */
  58     {
  59       if (buffer[4] == 'F')
  60         return MEMCACHED_NOTFOUND;
  61       else if (buffer[4] == 'S')
  62         return MEMCACHED_NOTSTORED;
  63       else
  64         return MEMCACHED_UNKNOWN_READ_FAILURE;
  65     }
  66   case 'E': /* PROTOCOL ERROR or END */
  67     {
  68       if (buffer[1] == 'N')
  69         return MEMCACHED_END;
  70       else if (buffer[1] == 'R')
  71         return MEMCACHED_PROTOCOL_ERROR;
  72       else
  73         return MEMCACHED_UNKNOWN_READ_FAILURE;
  74     }
  75   case 'C': /* CLIENT ERROR */
  76     return MEMCACHED_CLIENT_ERROR;
  77   default:
  78     return MEMCACHED_UNKNOWN_READ_FAILURE;
  79
  80   }
  81
  82   return MEMCACHED_SUCCESS;
  83 }