git.m6w6.name Git - m6w6/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       if (total_length >= buffer_length)
  48         return MEMCACHED_PROTOCOL_ERROR;
  49     }
  50     buffer_ptr++;
  51     *buffer_ptr= 0;
  52
  53     if (memcached_server_response_count(ptr, server_key))
  54       memcached_server_response_decrement(ptr, server_key);
  55   }
  56
  57   switch(buffer[0])
  58   {
  59   case 'V': /* VALUE || VERSION */
  60     return MEMCACHED_SUCCESS;
  61   case 'O': /* OK */
  62     return MEMCACHED_SUCCESS;
  63   case 'S': /* STORED STATS SERVER_ERROR */
  64     {
  65       if (buffer[2] == 'A') /* STORED STATS */
  66         return MEMCACHED_STAT;
  67       else if (buffer[1] == 'E')
  68         return MEMCACHED_SERVER_ERROR;
  69       else if (buffer[1] == 'T')
  70         return MEMCACHED_STORED;
  71       else
  72         return MEMCACHED_UNKNOWN_READ_FAILURE;
  73     }
  74   case 'D': /* DELETED */
  75     return MEMCACHED_DELETED;
  76   case 'N': /* NOT_FOUND */
  77     {
  78       if (buffer[4] == 'F')
  79         return MEMCACHED_NOTFOUND;
  80       else if (buffer[4] == 'S')
  81         return MEMCACHED_NOTSTORED;
  82       else
  83         return MEMCACHED_UNKNOWN_READ_FAILURE;
  84     }
  85   case 'E': /* PROTOCOL ERROR or END */
  86     {
  87       if (buffer[1] == 'N')
  88         return MEMCACHED_END;
  89       else if (buffer[1] == 'R')
  90         return MEMCACHED_PROTOCOL_ERROR;
  91       else
  92         return MEMCACHED_UNKNOWN_READ_FAILURE;
  93     }
  94   case 'C': /* CLIENT ERROR */
  95     return MEMCACHED_CLIENT_ERROR;
  96   default:
  97     return MEMCACHED_UNKNOWN_READ_FAILURE;
  98
  99   }
 100
 101   return MEMCACHED_SUCCESS;
 102 }
 103
 104 char *memcached_result_value(memcached_result_st *ptr)
 105 {
 106   memcached_string_st *sptr= &ptr->value;
 107   return memcached_string_value(sptr);
 108 }
 109
 110 size_t memcached_result_length(memcached_result_st *ptr)
 111 {
 112   memcached_string_st *sptr= &ptr->value;
 113   return memcached_string_length(sptr);
 114 }