WATCHPOINT_STRING(key);
return MEMCACHED_UNKNOWN_STAT_KEY;
}
- else if (!strcmp("pid", key))
+ else if (not strcmp("pid", key))
{
- memc_stat->pid= (uint32_t) strtol(value, (char **)NULL, 10);
+ int64_t temp= strtoll(value, (char **)NULL, 10);
+
+ if (temp <= INT32_MAX and ( sizeof(pid_t) == sizeof(int32_t) ))
+ {
+ memc_stat->pid= temp;
+ }
+ else if (temp > -1)
+ {
+ memc_stat->pid= temp;
+ }
+ else
+ {
+ // If we got a value less then -1 then something went wrong in the
+ // protocol
+ }
}
- else if (!strcmp("uptime", key))
+ else if (not strcmp("uptime", key))
{
- memc_stat->uptime= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->uptime= strtoul(value, (char **)NULL, 10);
}
- else if (!strcmp("time", key))
+ else if (not strcmp("time", key))
{
- memc_stat->time= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->time= strtoul(value, (char **)NULL, 10);
}
- else if (!strcmp("version", key))
+ else if (not strcmp("version", key))
{
memcpy(memc_stat->version, value, strlen(value));
memc_stat->version[strlen(value)]= 0;
}
- else if (!strcmp("pointer_size", key))
+ else if (not strcmp("pointer_size", key))
{
- memc_stat->pointer_size= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->pointer_size= strtoul(value, (char **)NULL, 10);
}
- else if (!strcmp("rusage_user", key))
+ else if (not strcmp("rusage_user", key))
{
char *walk_ptr;
- for (walk_ptr= value; (!ispunct(*walk_ptr)); walk_ptr++);
+ for (walk_ptr= value; (!ispunct(*walk_ptr)); walk_ptr++) {};
*walk_ptr= 0;
walk_ptr++;
- memc_stat->rusage_user_seconds= (uint32_t) strtol(value, (char **)NULL, 10);
- memc_stat->rusage_user_microseconds= (uint32_t) strtol(walk_ptr, (char **)NULL, 10);
+ memc_stat->rusage_user_seconds= strtoul(value, (char **)NULL, 10);
+ memc_stat->rusage_user_microseconds= strtoul(walk_ptr, (char **)NULL, 10);
}
- else if (!strcmp("rusage_system", key))
+ else if (not strcmp("rusage_system", key))
{
char *walk_ptr;
- for (walk_ptr= value; (!ispunct(*walk_ptr)); walk_ptr++);
+ for (walk_ptr= value; (!ispunct(*walk_ptr)); walk_ptr++) {};
*walk_ptr= 0;
walk_ptr++;
- memc_stat->rusage_system_seconds= (uint32_t) strtol(value, (char **)NULL, 10);
- memc_stat->rusage_system_microseconds= (uint32_t) strtol(walk_ptr, (char **)NULL, 10);
+ memc_stat->rusage_system_seconds= strtoul(value, (char **)NULL, 10);
+ memc_stat->rusage_system_microseconds= strtoul(walk_ptr, (char **)NULL, 10);
}
- else if (!strcmp("curr_items", key))
+ else if (not strcmp("curr_items", key))
{
- memc_stat->curr_items= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->curr_items= strtoul(value, (char **)NULL, 10);
}
- else if (!strcmp("total_items", key))
+ else if (not strcmp("total_items", key))
{
- memc_stat->total_items= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->total_items= strtoul(value, (char **)NULL, 10);
}
- else if (!strcmp("bytes_read", key))
+ else if (not strcmp("bytes_read", key))
{
- memc_stat->bytes_read= (uint32_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->bytes_read= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("bytes_written", key))
+ else if (not strcmp("bytes_written", key))
{
- memc_stat->bytes_written= (uint32_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->bytes_written= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("bytes", key))
+ else if (not strcmp("bytes", key))
{
- memc_stat->bytes= (uint32_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->bytes= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("curr_connections", key))
+ else if (not strcmp("curr_connections", key))
{
- memc_stat->curr_connections= (uint32_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->curr_connections= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("total_connections", key))
+ else if (not strcmp("total_connections", key))
{
- memc_stat->total_connections= (uint32_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->total_connections= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("connection_structures", key))
+ else if (not strcmp("connection_structures", key))
{
- memc_stat->connection_structures= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->connection_structures= strtoul(value, (char **)NULL, 10);
}
- else if (!strcmp("cmd_get", key))
+ else if (not strcmp("cmd_get", key))
{
- memc_stat->cmd_get= (uint64_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->cmd_get= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("cmd_set", key))
+ else if (not strcmp("cmd_set", key))
{
- memc_stat->cmd_set= (uint64_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->cmd_set= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("get_hits", key))
+ else if (not strcmp("get_hits", key))
{
- memc_stat->get_hits= (uint64_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->get_hits= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("get_misses", key))
+ else if (not strcmp("get_misses", key))
{
- memc_stat->get_misses= (uint64_t)strtoll(value, (char **)NULL, 10);
+ memc_stat->get_misses= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("evictions", key))
+ else if (not strcmp("evictions", key))
{
- memc_stat->evictions= (uint64_t)strtoll(value, (char **)NULL, 10);
+ memc_stat->evictions= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("limit_maxbytes", key))
+ else if (not strcmp("limit_maxbytes", key))
{
- memc_stat->limit_maxbytes= (uint64_t) strtoll(value, (char **)NULL, 10);
+ memc_stat->limit_maxbytes= strtoull(value, (char **)NULL, 10);
}
- else if (!strcmp("threads", key))
+ else if (not strcmp("threads", key))
{
- memc_stat->threads= (uint32_t) strtol(value, (char **)NULL, 10);
+ memc_stat->threads= strtoul(value, (char **)NULL, 10);
}
- else if (!(strcmp("delete_misses", key) == 0 ||/* New stats in the 1.3 beta */
- strcmp("delete_hits", key) == 0 ||/* Just swallow them for now.. */
- strcmp("incr_misses", key) == 0 ||
- strcmp("incr_hits", key) == 0 ||
- strcmp("decr_misses", key) == 0 ||
- strcmp("decr_hits", key) == 0 ||
- strcmp("cas_misses", key) == 0 ||
- strcmp("cas_hits", key) == 0 ||
- strcmp("cas_badval", key) == 0 ||
- strcmp("cmd_flush", key) == 0 ||
- strcmp("accepting_conns", key) == 0 ||
- strcmp("listen_disabled_num", key) == 0 ||
- strcmp("conn_yields", key) == 0 ||
- strcmp("auth_cmds", key) == 0 ||
- strcmp("auth_errors", key) == 0 ||
- strcmp("reclaimed", key) == 0))
+ else if (not (strcmp("delete_misses", key) == 0 or /* New stats in the 1.3 beta */
+ strcmp("delete_hits", key) == 0 or /* Just swallow them for now.. */
+ strcmp("incr_misses", key) == 0 or
+ strcmp("incr_hits", key) == 0 or
+ strcmp("decr_misses", key) == 0 or
+ strcmp("decr_hits", key) == 0 or
+ strcmp("cas_misses", key) == 0 or
+ strcmp("cas_hits", key) == 0 or
+ strcmp("cas_badval", key) == 0 or
+ strcmp("cmd_flush", key) == 0 or
+ strcmp("accepting_conns", key) == 0 or
+ strcmp("listen_disabled_num", key) == 0 or
+ strcmp("conn_yields", key) == 0 or
+ strcmp("auth_cmds", key) == 0 or
+ strcmp("auth_errors", key) == 0 or
+ strcmp("reclaimed", key) == 0))
{
WATCHPOINT_STRING(key);
/* return MEMCACHED_UNKNOWN_STAT_KEY; */
*error= MEMCACHED_SUCCESS;
- if (!memcmp("pid", key, sizeof("pid") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->pid);
- else if (!memcmp("uptime", key, sizeof("uptime") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->uptime);
- else if (!memcmp("time", key, sizeof("time") -1))
+ if (not memcmp("pid", key, sizeof("pid") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lld", (signed long long)memc_stat->pid);
+ }
+ else if (not memcmp("uptime", key, sizeof("uptime") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->uptime);
+ }
+ else if (not memcmp("time", key, sizeof("time") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->time);
- else if (!memcmp("version", key, sizeof("version") -1))
+ }
+ else if (not memcmp("version", key, sizeof("version") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%s", memc_stat->version);
- else if (!memcmp("pointer_size", key, sizeof("pointer_size") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->pointer_size);
- else if (!memcmp("rusage_user", key, sizeof("rusage_user") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u.%u", memc_stat->rusage_user_seconds, memc_stat->rusage_user_microseconds);
- else if (!memcmp("rusage_system", key, sizeof("rusage_system") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u.%u", memc_stat->rusage_system_seconds, memc_stat->rusage_system_microseconds);
- else if (!memcmp("curr_items", key, sizeof("curr_items") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->curr_items);
- else if (!memcmp("total_items", key, sizeof("total_items") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->total_items);
- else if (!memcmp("curr_connections", key, sizeof("curr_connections") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->curr_connections);
- else if (!memcmp("total_connections", key, sizeof("total_connections") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->total_connections);
- else if (!memcmp("connection_structures", key, sizeof("connection_structures") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->connection_structures);
- else if (!memcmp("cmd_get", key, sizeof("cmd_get") -1))
+ }
+ else if (not memcmp("pointer_size", key, sizeof("pointer_size") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->pointer_size);
+ }
+ else if (not memcmp("rusage_user", key, sizeof("rusage_user") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu.%lu", memc_stat->rusage_user_seconds, memc_stat->rusage_user_microseconds);
+ }
+ else if (not memcmp("rusage_system", key, sizeof("rusage_system") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu.%lu", memc_stat->rusage_system_seconds, memc_stat->rusage_system_microseconds);
+ }
+ else if (not memcmp("curr_items", key, sizeof("curr_items") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->curr_items);
+ }
+ else if (not memcmp("total_items", key, sizeof("total_items") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->total_items);
+ }
+ else if (not memcmp("curr_connections", key, sizeof("curr_connections") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->curr_connections);
+ }
+ else if (not memcmp("total_connections", key, sizeof("total_connections") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->total_connections);
+ }
+ else if (not memcmp("connection_structures", key, sizeof("connection_structures") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->connection_structures);
+ }
+ else if (not memcmp("cmd_get", key, sizeof("cmd_get") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->cmd_get);
- else if (!memcmp("cmd_set", key, sizeof("cmd_set") -1))
+ }
+ else if (not memcmp("cmd_set", key, sizeof("cmd_set") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->cmd_set);
- else if (!memcmp("get_hits", key, sizeof("get_hits") -1))
+ }
+ else if (not memcmp("get_hits", key, sizeof("get_hits") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->get_hits);
- else if (!memcmp("get_misses", key, sizeof("get_misses") -1))
+ }
+ else if (not memcmp("get_misses", key, sizeof("get_misses") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->get_misses);
- else if (!memcmp("evictions", key, sizeof("evictions") -1))
+ }
+ else if (not memcmp("evictions", key, sizeof("evictions") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->evictions);
- else if (!memcmp("bytes_read", key, sizeof("bytes_read") -1))
+ }
+ else if (not memcmp("bytes_read", key, sizeof("bytes_read") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes_read);
- else if (!memcmp("bytes_written", key, sizeof("bytes_written") -1))
+ }
+ else if (not memcmp("bytes_written", key, sizeof("bytes_written") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes_written);
- else if (!memcmp("bytes", key, sizeof("bytes") -1))
+ }
+ else if (not memcmp("bytes", key, sizeof("bytes") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->bytes);
- else if (!memcmp("limit_maxbytes", key, sizeof("limit_maxbytes") -1))
+ }
+ else if (not memcmp("limit_maxbytes", key, sizeof("limit_maxbytes") -1))
+ {
length= snprintf(buffer, SMALL_STRING_LEN,"%llu", (unsigned long long)memc_stat->limit_maxbytes);
- else if (! memcmp("threads", key, sizeof("threads") -1))
- length= snprintf(buffer, SMALL_STRING_LEN,"%u", memc_stat->threads);
+ }
+ else if (not memcmp("threads", key, sizeof("threads") -1))
+ {
+ length= snprintf(buffer, SMALL_STRING_LEN,"%lu", memc_stat->threads);
+ }
else
{
*error= MEMCACHED_NOTFOUND;
memcached_server_write_instance_st instance,
struct local_context *check)
{
- memcached_return_t rc;
-
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
protocol_binary_request_stats request= {}; // = {.bytes= {0}};
request.message.header.request.magic= PROTOCOL_BINARY_REQ;
request.message.header.request.opcode= PROTOCOL_BINARY_CMD_STAT;
request.message.header.request.datatype= PROTOCOL_BINARY_RAW_BYTES;
- if (args != NULL)
+ if (args)
{
size_t len= strlen(args);
- rc= memcached_validate_key_length(len, true);
+ memcached_return_t rc= memcached_validate_key_length(len, true);
unlikely (rc != MEMCACHED_SUCCESS)
return rc;
memcached_server_response_decrement(instance);
do
{
- rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
+ memcached_return_t rc= memcached_response(instance, buffer, sizeof(buffer), NULL);
if (rc == MEMCACHED_END)
break;
memcached_server_write_instance_st instance,
struct local_context *check)
{
- memcached_return_t rc;
char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
int send_length;
if (args)
- send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
- "stats %s\r\n", args);
+ {
+ send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, "stats %s\r\n", args);
+ }
else
- send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE,
- "stats\r\n");
+ {
+ send_length= (size_t) snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, "stats\r\n");
+ }
if (send_length >= MEMCACHED_DEFAULT_COMMAND_SIZE || send_length < 0)
- return MEMCACHED_WRITE_FAILURE;
-
- rc= memcached_do(instance, buffer, (size_t)send_length, true);
- if (rc != MEMCACHED_SUCCESS)
- goto error;
-
- while (1)
{
- rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL);
+ return memcached_set_error(*instance, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT,
+ memcached_literal_param("snprintf(MEMCACHED_DEFAULT_COMMAND_SIZE)"));
+ }
- if (rc == MEMCACHED_STAT)
+ memcached_return_t rc= memcached_do(instance, buffer, (size_t)send_length, true);
+ if (memcached_success(rc))
+ {
+ while ((rc= memcached_response(instance, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, NULL)) == MEMCACHED_STAT)
{
char *string_ptr, *end_ptr;
char *key, *value;
string_ptr= buffer;
string_ptr+= 5; /* Move past STAT */
- for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++);
+ for (end_ptr= string_ptr; isgraph(*end_ptr); end_ptr++) {};
key= string_ptr;
key[(size_t)(end_ptr-string_ptr)]= 0;
string_ptr= end_ptr + 1;
- for (end_ptr= string_ptr; !(isspace(*end_ptr)); end_ptr++);
+ for (end_ptr= string_ptr; !(isspace(*end_ptr)); end_ptr++) {};
value= string_ptr;
value[(size_t)(end_ptr-string_ptr)]= 0;
string_ptr= end_ptr + 2;
check->context);
}
}
- else
- break;
}
-error:
if (rc == MEMCACHED_END)
return MEMCACHED_SUCCESS;
else
memcached_stat_st *memcached_stat(memcached_st *self, char *args, memcached_return_t *error)
{
- memcached_return_t rc;
- memcached_stat_st *stats;
+ memcached_return_t unused;
+ if (error == NULL)
+ {
+ error= &unused;
+ }
- if ((rc= initialize_query(self)) != MEMCACHED_SUCCESS)
+ memcached_return_t rc;
+ if (memcached_failed(rc= initialize_query(self)))
{
- if (error)
- *error= rc;
+ *error= rc;
return NULL;
}
WATCHPOINT_ASSERT(error);
- unlikely (self->flags.use_udp)
+ if (self->flags.use_udp)
{
- if (error)
- *error= MEMCACHED_NOT_SUPPORTED;
+ *error= memcached_set_error(*self, MEMCACHED_NOT_SUPPORTED, MEMCACHED_AT);
return NULL;
}
- stats= static_cast<memcached_stat_st *>(libmemcached_calloc(self, memcached_server_count(self), sizeof(memcached_stat_st)));
+ memcached_stat_st *stats= static_cast<memcached_stat_st *>(libmemcached_calloc(self, memcached_server_count(self), sizeof(memcached_stat_st)));
- if (! stats)
+ if (not stats)
{
- if (error)
- *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
return NULL;
}
memcached_server_write_instance_st instance;
memcached_stat_st *stat_instance;
- stat_instance= stats + x;
+ stat_instance= stats +x;
+ stat_instance->pid= -1;
stat_instance->root= self;
instance= memcached_server_instance_fetch(self, x);
temp_return= ascii_stats_fetch(stat_instance, args, instance, NULL);
}
- if (temp_return != MEMCACHED_SUCCESS)
+ if (memcached_failed(temp_return))
+ {
rc= MEMCACHED_SOME_ERRORS;
+ }
}
- if (error)
- *error= rc;
+ *error= rc;
return stats;
}
const char *hostname, in_port_t port)
{
memcached_st memc;
- memcached_st *memc_ptr;
memcached_server_write_instance_st instance;
memset(memc_stat, 0, sizeof(memcached_stat_st));
- memc_ptr= memcached_create(&memc);
- if (! memc_ptr)
+ memcached_st *memc_ptr= memcached_create(&memc);
+ if (not memc_ptr)
return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
memcached_server_add(&memc, hostname, port);
We make a copy of the keys since at some point in the not so distant future
we will add support for "found" keys.
*/
-char ** memcached_stat_get_keys(const memcached_st *ptr,
- memcached_stat_st *memc_stat,
+char ** memcached_stat_get_keys(memcached_st *ptr,
+ memcached_stat_st *,
memcached_return_t *error)
{
- char **list;
- size_t length= sizeof(memcached_stat_keys);
-
- (void)memc_stat;
-
- list= static_cast<char **>(libmemcached_malloc(ptr, length));
+ if (not ptr)
+ return NULL;
+ char **list= static_cast<char **>(libmemcached_malloc(ptr, sizeof(memcached_stat_keys)));
if (not list)
{
- *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ *error= memcached_set_error(*ptr, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
return NULL;
}
return list;
}
-void memcached_stat_free(const memcached_st *ptr, memcached_stat_st *memc_stat)
+void memcached_stat_free(const memcached_st *, memcached_stat_st *memc_stat)
{
- if (memc_stat == NULL)
+ WATCHPOINT_ASSERT(memc_stat); // Be polite, but when debugging catch this as an error
+ if (not memc_stat)
{
- WATCHPOINT_ASSERT(0); /* Be polite, but when debugging catch this as an error */
return;
}
if (memc_stat->root)
{
libmemcached_free(memc_stat->root, memc_stat);
+ return;
}
- else if (ptr)
- {
- libmemcached_free(ptr, memc_stat);
- }
- else
- {
- free(memc_stat);
- }
+
+ libmemcached_free(NULL, memc_stat);
}
static memcached_return_t call_stat_fn(memcached_st *ptr,
projects / awesomized / libmemcached / blobdiff