X-Git-Url: https://git.m6w6.name/?a=blobdiff_plain;f=lib%2Fmemcached_get.c;h=3ddeff886eb75cc8ab7af02d997dd29a75c4d043;hb=375ad7d822a4bbc121a79ce7e927385d6be7f754;hp=c7c21d1ee43ad7518700d1c6f026ca1323dcd62a;hpb=b9298b65419d873299e010afa0f4eca2c8259969;p=m6w6%2Flibmemcached

diff --git a/lib/memcached_get.c b/lib/memcached_get.c
index c7c21d1e..3ddeff88 100644
--- a/lib/memcached_get.c
+++ b/lib/memcached_get.c
@@ -12,14 +12,11 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
   char *string_ptr;
   char *end_ptr;
 
-  assert(value_length);
-  assert(flags);
-  assert(error);
-
   memset(buffer, 0, MEMCACHED_DEFAULT_COMMAND_SIZE);
   end_ptr= buffer + MEMCACHED_DEFAULT_COMMAND_SIZE;
 
   *value_length= 0;
+  *flags= 0;
 
   *error= memcached_response(ptr, buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, server_key);
 
@@ -36,7 +33,7 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
       memset(key, 0, MEMCACHED_MAX_KEY);
       *key_length= 0;
 
-      for (; end_ptr == string_ptr || *string_ptr != ' '; string_ptr++)
+      for (; end_ptr > string_ptr && *string_ptr != ' '; string_ptr++)
       {
         *key= *string_ptr;
         key++;
@@ -44,7 +41,7 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
       }
     }
     else /* Skip characters */
-      for (; end_ptr == string_ptr || *string_ptr != ' '; string_ptr++);
+      for (; end_ptr > string_ptr && *string_ptr != ' '; string_ptr++);
 
     if (end_ptr == string_ptr)
         goto read_error;
@@ -53,7 +50,7 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
     string_ptr++;
     if (end_ptr == string_ptr)
         goto read_error;
-    for (next_ptr= string_ptr; end_ptr == string_ptr || *string_ptr != ' '; string_ptr++);
+    for (next_ptr= string_ptr; end_ptr > string_ptr && *string_ptr != ' '; string_ptr++);
     *flags= (uint16_t)strtol(next_ptr, &string_ptr, 10);
 
     if (end_ptr == string_ptr)
@@ -64,7 +61,7 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
     if (end_ptr == string_ptr)
         goto read_error;
 
-    for (next_ptr= string_ptr; end_ptr == string_ptr || *string_ptr != ' '; string_ptr++);
+    for (next_ptr= string_ptr; end_ptr > string_ptr && *string_ptr != ' '; string_ptr++);
     *value_length= (size_t)strtoll(next_ptr, &string_ptr, 10);
 
     if (end_ptr == string_ptr)
@@ -85,17 +82,23 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
 
       /* We add two bytes so that we can walk the \r\n */
       value= (char *)malloc(((*value_length) +2) * sizeof(char));
-      memset(value, 0, ((*value_length) +2) * sizeof(char));
-
       if (!value)
       {
         *value_length= 0;
         *error= MEMCACHED_MEMORY_ALLOCATION_FAILURE;
         return NULL;
       }
+      memset(value, 0, ((*value_length) +2) * sizeof(char));
 
       value_ptr= value;
       read_length= 0;
+      /* 
+        We read the \r\n into the string since not doing so is more 
+        cycles then the waster of memory to do so.
+
+        We are null terminating through, which will most likely make
+        some people lazy about using the return length.
+      */
       to_read= (*value_length) + 2;
 
       read_length= memcached_io_read(ptr, server_key,
@@ -107,6 +110,9 @@ static char *memcached_value_fetch(memcached_st *ptr, char *key, size_t *key_len
         goto read_error;
       }
 
+      value[*value_length]= 0;
+      value[(*value_length) + 1]= 0;
+
       return value;
     }
   }
@@ -119,15 +125,18 @@ read_error:
   return NULL;
 }
 
+/* 
+  What happens if no servers exist?
+*/
 char *memcached_get(memcached_st *ptr, char *key, size_t key_length, 
                     size_t *value_length, 
                     uint16_t *flags,
                     memcached_return *error)
 {
-  size_t send_length;
   char buffer[MEMCACHED_DEFAULT_COMMAND_SIZE];
+  char *buf_ptr= buffer;
   unsigned int server_key;
-  char *value;
+  char *value= NULL;
   LIBMEMCACHED_MEMCACHED_GET_START();
 
   server_key= memcached_generate_hash(ptr, key, key_length);
@@ -138,10 +147,14 @@ char *memcached_get(memcached_st *ptr, char *key, size_t key_length,
   if (*error != MEMCACHED_SUCCESS)
     goto error;
 
-  send_length= snprintf(buffer, MEMCACHED_DEFAULT_COMMAND_SIZE, "get %.*s\r\n", 
-                        (int)key_length, key);
+  memcpy(buf_ptr, "get ", 4);
+  buf_ptr+= 4;
+  memcpy(buf_ptr, key, key_length);
+  buf_ptr+= key_length;
+  memcpy(buf_ptr, "\r\n", 2);
+  buf_ptr+= 2;
 
-  if ((memcached_io_write(ptr, server_key, buffer, send_length, 1)) == -1)
+  if ((memcached_io_write(ptr, server_key, buffer, (size_t)(buf_ptr - buffer), 1)) == -1)
   {
     *error= MEMCACHED_WRITE_FAILURE;
     goto error;
@@ -154,6 +167,8 @@ char *memcached_get(memcached_st *ptr, char *key, size_t key_length,
     *error= MEMCACHED_NOTFOUND;
     goto error;
   }
+  else if (*error == MEMCACHED_END)
+    assert(0); /* If this happens we have somehow messed up the fetch */
   else if (*error == MEMCACHED_SUCCESS)
   {
     memcached_return rc;
@@ -186,18 +201,17 @@ memcached_return memcached_mget(memcached_st *ptr,
                                 char **keys, size_t *key_length, 
                                 unsigned int number_of_keys)
 {
-  char buffer[HUGE_STRING_LEN];
   unsigned int x;
-  memcached_return rc;
-  memcached_string_st **cursor_key_exec;
+  memcached_return rc= MEMCACHED_NOTFOUND;
+  char *cursor_key_exec;
   LIBMEMCACHED_MEMCACHED_MGET_START();
-
   ptr->cursor_server= 0;
-  memset(buffer, 0, HUGE_STRING_LEN);
 
-  cursor_key_exec= (memcached_string_st **)malloc(sizeof(memcached_string_st *) * ptr->number_of_hosts);
-  memset(cursor_key_exec, 0, sizeof(memcached_string_st *) * ptr->number_of_hosts);
+  if (number_of_keys == 0)
+    return MEMCACHED_NOTFOUND;
 
+  cursor_key_exec= (char *)malloc(sizeof(char) * ptr->number_of_hosts);
+  memset(cursor_key_exec, 0, sizeof(char) * ptr->number_of_hosts);
 
   for (x= 0; x < number_of_keys; x++)
   {
@@ -205,26 +219,32 @@ memcached_return memcached_mget(memcached_st *ptr,
 
     server_key= memcached_generate_hash(ptr, keys[x], key_length[x]);
 
-    if (cursor_key_exec[server_key])
+    if (cursor_key_exec[server_key] == 0)
     {
-      memcached_string_st *string= cursor_key_exec[server_key];
+      rc= memcached_connect(ptr, server_key);
 
-      memcached_string_append_character(ptr, string, ' ');
-      memcached_string_append(ptr, string, keys[x], key_length[x]);
+      if ((memcached_io_write(ptr, server_key, "get ", 4, 0)) == -1)
+      {
+        memcached_quit(ptr);
+        rc= MEMCACHED_SOME_ERRORS;
+        break;
+      }
     }
-    else
-    {
-      memcached_string_st *string= memcached_string_create(ptr, SMALL_STRING_LEN);
-
-      /* We need to figure out the correct way to error in case of this failure */
-      if (!string)
-        assert(0);
 
-      memcached_string_append(ptr, string, "get ", 4);
-      memcached_string_append(ptr, string, keys[x], key_length[x]);
+    if ((memcached_io_write(ptr, server_key, keys[x], key_length[x], 0)) == -1)
+    {
+      memcached_quit(ptr);
+      rc= MEMCACHED_SOME_ERRORS;
+      break;
+    }
 
-      cursor_key_exec[server_key]= string;
+    if ((memcached_io_write(ptr, server_key, " ", 1, 0)) == -1)
+    {
+      memcached_quit(ptr);
+      rc= MEMCACHED_SOME_ERRORS;
+      break;
     }
+    cursor_key_exec[server_key]= 1;
   }
 
 
@@ -236,20 +256,17 @@ memcached_return memcached_mget(memcached_st *ptr,
     if (cursor_key_exec[x])
     {
       /* We need to doo something about non-connnected hosts in the future */
-      rc= memcached_connect(ptr, x);
-
-      memcached_string_st *string= cursor_key_exec[x];
-      memcached_string_append(ptr, string, "\r\n", 2);
-
-      if ((memcached_io_write(ptr, x, string->string, 
-                              memcached_string_length(ptr, string), 1)) == -1)
+      if ((memcached_io_write(ptr, x, "\r\n", 2, 1)) == -1)
       {
         memcached_quit(ptr);
         rc= MEMCACHED_SOME_ERRORS;
+        break;
       }
-      memcached_string_free(ptr, string);
-      cursor_key_exec[x]= NULL; /* Remove warning */
+
+      ptr->hosts[x].cursor_active= 1;
     }
+    else
+      ptr->hosts[x].cursor_active= 0;
   }
 
   free(cursor_key_exec);
@@ -267,16 +284,28 @@ char *memcached_fetch(memcached_st *ptr, char *key, size_t *key_length,
 
   while (ptr->cursor_server < ptr->number_of_hosts)
   {
+    if (!ptr->hosts[ptr->cursor_server].cursor_active)
+    {
+      ptr->cursor_server++;
+      continue;
+    }
+
     value_check= memcached_value_fetch(ptr, key, key_length, value_length, flags,
                                        error, 1, ptr->cursor_server);
     
     if (*error == MEMCACHED_NOTFOUND)
       ptr->cursor_server++;
+    else if (*error == MEMCACHED_END && *value_length == 0)
+      return NULL;
+    else if (*error == MEMCACHED_END)
+      assert(0); /* If this happens we have somehow messed up the fetch */
     else if (*error != MEMCACHED_SUCCESS)
       return NULL;
     else
       return value_check;
+
   }
 
+  *value_length= 0;
   return NULL;
 }