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   send_length= 0;
  22
  23   max_messages= memcached_server_response_count(ptr, server_key);
  24   for (x= 0; x <=  max_messages; x++)
  25   {
  26     size_t total_length= 0;
  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       total_length++;
  45       WATCHPOINT_ASSERT(total_length < buffer_length);
  46     }
  47     buffer_ptr++;
  48     *buffer_ptr= 0;
  49
  50     if (memcached_server_response_count(ptr, server_key))
  51       memcached_server_response_decrement(ptr, server_key);
  52   }
  53
  54   switch(buffer[0])
  55   {
  56   case 'V': /* VALUE || VERSION */
  57     return MEMCACHED_SUCCESS;
  58   case 'O': /* OK */
  59     return MEMCACHED_SUCCESS;
  60   case 'S': /* STORED STATS SERVER_ERROR */
  61     {
  62       if (buffer[2] == 'A') /* STORED STATS */
  63         return MEMCACHED_STAT;
  64       else if (buffer[1] == 'E')
  65         return MEMCACHED_SERVER_ERROR;
  66       else if (buffer[1] == 'T')
  67         return MEMCACHED_STORED;
  68       else
  69         return MEMCACHED_UNKNOWN_READ_FAILURE;
  70     }
  71   case 'D': /* DELETED */
  72     return MEMCACHED_DELETED;
  73   case 'N': /* NOT_FOUND */
  74     {
  75       if (buffer[4] == 'F')
  76         return MEMCACHED_NOTFOUND;
  77       else if (buffer[4] == 'S')
  78         return MEMCACHED_NOTSTORED;
  79       else
  80         return MEMCACHED_UNKNOWN_READ_FAILURE;
  81     }
  82   case 'E': /* PROTOCOL ERROR or END */
  83     {
  84       if (buffer[1] == 'N')
  85         return MEMCACHED_END;
  86       else if (buffer[1] == 'R')
  87         return MEMCACHED_PROTOCOL_ERROR;
  88       else
  89         return MEMCACHED_UNKNOWN_READ_FAILURE;
  90     }
  91   case 'C': /* CLIENT ERROR */
  92     return MEMCACHED_CLIENT_ERROR;
  93   default:
  94     return MEMCACHED_UNKNOWN_READ_FAILURE;
  95
  96   }
  97
  98   return MEMCACHED_SUCCESS;
  99 }
 100
 101 char *memcached_result_value(memcached_result_st *ptr)
 102 {
 103   memcached_string_st *sptr= &ptr->value;
 104   return memcached_string_value(sptr);
 105 }
 106
 107 size_t memcached_result_length(memcached_result_st *ptr)
 108 {
 109   memcached_string_st *sptr= &ptr->value;
 110   return memcached_string_length(sptr);
 111 }