--- /dev/null
+/* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
+ *
+ * Libmemcached library
+ *
+ * Copyright (C) 2011 Data Differential, http://datadifferential.com/
+ * Copyright (C) 2006-2009 Brian Aker All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * * The names of its contributors may not be used to endorse or
+ * promote products derived from this software without specific prior
+ * written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+
+#include <libmemcached/common.h>
+
+inline static memcached_return_t _string_check(memcached_string_st *string, size_t need)
+{
+ if (need && need > (size_t)(string->current_size - (size_t)(string->end - string->string)))
+ {
+ size_t current_offset= (size_t) (string->end - string->string);
+ char *new_value;
+ size_t adjust;
+ size_t new_size;
+
+ /* This is the block multiplier. To keep it larger and surive division errors we must round it up */
+ adjust= (need - (size_t)(string->current_size - (size_t)(string->end - string->string))) / MEMCACHED_BLOCK_SIZE;
+ adjust++;
+
+ new_size= sizeof(char) * (size_t)((adjust * MEMCACHED_BLOCK_SIZE) + string->current_size);
+ /* Test for overflow */
+ if (new_size < need)
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+
+ new_value= static_cast<char *>(libmemcached_realloc(string->root, string->string, new_size));
+
+ if (new_value == NULL)
+ {
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ string->string= new_value;
+ string->end= string->string + current_offset;
+
+ string->current_size+= (MEMCACHED_BLOCK_SIZE * adjust);
+ }
+
+ return MEMCACHED_SUCCESS;
+}
+
+static inline void _init_string(memcached_string_st *self)
+{
+ self->current_size= 0;
+ self->end= self->string= NULL;
+}
+
+memcached_string_st *memcached_string_create(const memcached_st *memc, memcached_string_st *self, size_t initial_size)
+{
+ memcached_return_t rc;
+
+ WATCHPOINT_ASSERT(memc);
+
+ /* Saving malloc calls :) */
+ if (self)
+ {
+ WATCHPOINT_ASSERT(self->options.is_initialized == false);
+
+ self->options.is_allocated= false;
+ }
+ else
+ {
+ self= static_cast<memcached_string_st *>(libmemcached_malloc(memc, sizeof(memcached_string_st)));
+
+ if (self == NULL)
+ {
+ return NULL;
+ }
+
+ self->options.is_allocated= true;
+ }
+ self->root= const_cast<memcached_st *>(memc);
+
+ _init_string(self);
+
+ rc= _string_check(self, initial_size);
+ if (rc != MEMCACHED_SUCCESS)
+ {
+ if (rc == MEMCACHED_MEMORY_ALLOCATION_FAILURE)
+ {
+ memcached_set_errno(self->root, errno, NULL);
+ }
+ libmemcached_free(memc, self);
+
+ return NULL;
+ }
+
+ self->options.is_initialized= true;
+
+ WATCHPOINT_ASSERT(self->string == self->end);
+
+ return self;
+}
+
+memcached_return_t memcached_string_append_character(memcached_string_st *string,
+ char character)
+{
+ memcached_return_t rc;
+
+ rc= _string_check(string, 1);
+
+ if (rc != MEMCACHED_SUCCESS)
+ {
+ return rc;
+ }
+
+ *string->end= character;
+ string->end++;
+
+ return MEMCACHED_SUCCESS;
+}
+
+memcached_return_t memcached_string_append(memcached_string_st *string,
+ const char *value, size_t length)
+{
+ memcached_return_t rc;
+
+ rc= _string_check(string, length);
+
+ if (rc != MEMCACHED_SUCCESS)
+ {
+ return rc;
+ }
+
+ WATCHPOINT_ASSERT(length <= string->current_size);
+ WATCHPOINT_ASSERT(string->string);
+ WATCHPOINT_ASSERT(string->end >= string->string);
+
+ memcpy(string->end, value, length);
+ string->end+= length;
+
+ return MEMCACHED_SUCCESS;
+}
+
+char *memcached_string_c_copy(memcached_string_st *string)
+{
+ char *c_ptr;
+
+ if (memcached_string_length(string) == 0)
+ return NULL;
+
+ c_ptr= static_cast<char *>(libmemcached_malloc(string->root, (memcached_string_length(string)+1) * sizeof(char)));
+
+ if (c_ptr == NULL)
+ return NULL;
+
+ memcpy(c_ptr, memcached_string_value(string), memcached_string_length(string));
+ c_ptr[memcached_string_length(string)]= 0;
+
+ return c_ptr;
+}
+
+memcached_return_t memcached_string_reset(memcached_string_st *string)
+{
+ string->end= string->string;
+
+ return MEMCACHED_SUCCESS;
+}
+
+void memcached_string_free(memcached_string_st *ptr)
+{
+ if (ptr == NULL)
+ return;
+
+ if (ptr->string)
+ {
+ libmemcached_free(ptr->root, ptr->string);
+ }
+
+ if (memcached_is_allocated(ptr))
+ {
+ libmemcached_free(ptr->root, ptr);
+ }
+ else
+ {
+ ptr->options.is_initialized= false;
+ }
+}
+
+memcached_return_t memcached_string_check(memcached_string_st *string, size_t need)
+{
+ return _string_check(string, need);
+}
+
+size_t memcached_string_length(const memcached_string_st *self)
+{
+ return (size_t)(self->end - self->string);
+}
+
+size_t memcached_string_size(const memcached_string_st *self)
+{
+ return self->current_size;
+}
+
+const char *memcached_string_value(const memcached_string_st *self)
+{
+ return self->string;
+}
+
+char *memcached_string_value_mutable(const memcached_string_st *self)
+{
+ return self->string;
+}
+
+void memcached_string_set_length(memcached_string_st *self, size_t length)
+{
+ self->end= self->string + length;
+}
projects / awesomized / libmemcached / blobdiff