git.m6w6.name Git - m6w6/libmemcached/blob - libmemcached/memcached_fetch.c

   1 #include "common.h"
   2 #include "memcached_io.h"
   3
   4 char *memcached_fetch(memcached_st *ptr, char *key, size_t *key_length,
   5                       size_t *value_length,
   6                       uint32_t *flags,
   7                       memcached_return *error)
   8 {
   9   memcached_result_st *result_buffer= &ptr->result;
  10
  11   if (ptr->flags & MEM_USE_UDP)
  12   {
  13     *error= MEMCACHED_NOT_SUPPORTED;
  14     return NULL;
  15   }
  16
  17   result_buffer= memcached_fetch_result(ptr, result_buffer, error);
  18
  19   if (*error != MEMCACHED_SUCCESS || result_buffer == NULL)
  20   {
  21     *value_length= 0;
  22     return NULL;
  23   }
  24
  25   *value_length= memcached_string_length(&result_buffer->value);
  26
  27   if (key)
  28   {
  29     strncpy(key, result_buffer->key, result_buffer->key_length);
  30     *key_length= result_buffer->key_length;
  31   }
  32
  33   if (result_buffer->flags)
  34     *flags= result_buffer->flags;
  35   else
  36     *flags= 0;
  37
  38   return memcached_string_c_copy(&result_buffer->value);
  39 }
  40
  41 memcached_result_st *memcached_fetch_result(memcached_st *ptr,
  42                                             memcached_result_st *result,
  43                                             memcached_return *error)
  44 {
  45   memcached_server_st *server;
  46
  47   if (ptr->flags & MEM_USE_UDP)
  48   {
  49     *error= MEMCACHED_NOT_SUPPORTED;
  50     return NULL;
  51   }
  52
  53   if (result == NULL)
  54     if ((result= memcached_result_create(ptr, NULL)) == NULL)
  55       return NULL;
  56
  57   while ((server = memcached_io_get_readable_server(ptr)) != NULL) {
  58     char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
  59     *error= memcached_response(server, buffer, sizeof(buffer), result);
  60
  61     if (*error == MEMCACHED_SUCCESS)
  62       return result;
  63     else if (*error == MEMCACHED_END)
  64       memcached_server_response_reset(server);
  65     else
  66       break;
  67   }
  68
  69   /* We have completed reading data */
  70   if (result->is_allocated)
  71     memcached_result_free(result);
  72   else
  73     memcached_string_reset(&result->value);
  74
  75   return NULL;
  76 }
  77
  78 memcached_return memcached_fetch_execute(memcached_st *ptr,
  79                                          memcached_execute_function *callback,
  80                                          void *context,
  81                                          unsigned int number_of_callbacks)
  82 {
  83   memcached_result_st *result= &ptr->result;
  84   memcached_return rc= MEMCACHED_FAILURE;
  85   unsigned int x;
  86
  87   while ((result= memcached_fetch_result(ptr, result, &rc)) != NULL) {
  88     if (rc == MEMCACHED_SUCCESS)
  89     {
  90       for (x= 0; x < number_of_callbacks; x++)
  91       {
  92         rc= (*callback[x])(ptr, result, context);
  93         if (rc != MEMCACHED_SUCCESS)
  94           break;
  95       }
  96     }
  97   }
  98   return rc;
  99 }