--- /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);
+
+ /* This is the block multiplier. To keep it larger and surive division errors we must round it up */
+ size_t adjust= (need - (size_t)(string->current_size - (size_t)(string->end - string->string))) / MEMCACHED_BLOCK_SIZE;
+ adjust++;
+
+ size_t new_size= sizeof(char) * (size_t)((adjust * MEMCACHED_BLOCK_SIZE) + string->current_size);
+ /* Test for overflow */
+ if (new_size < need)
+ {
+ char error_message[1024];
+ int error_message_length= snprintf(error_message, sizeof(error_message),"Needed %ld, got %ld", (long)need, (long)new_size);
+ return memcached_set_error(*string->root, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT, error_message, error_message_length);
+ }
+
+ char *new_value= libmemcached_xrealloc(string->root, string->string, new_size, char);
+
+ if (new_value == NULL)
+ {
+ return memcached_set_error(*string->root, MEMCACHED_MEMORY_ALLOCATION_FAILURE, MEMCACHED_AT);
+ }
+
+ 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(Memcached *memc, memcached_string_st *self, size_t initial_size)
+{
+ WATCHPOINT_ASSERT(memc);
+
+ /* Saving malloc calls :) */
+ if (self)
+ {
+ WATCHPOINT_ASSERT(self->options.is_initialized == false);
+
+ memcached_set_allocated(self, false);
+ }
+ else
+ {
+ self= libmemcached_xmalloc(memc, memcached_string_st);
+
+ if (self == NULL)
+ {
+ return NULL;
+ }
+
+ memcached_set_allocated(self, true);
+ }
+ self->root= memc;
+
+ _init_string(self);
+
+ if (memcached_failed(_string_check(self, initial_size)))
+ {
+ if (memcached_is_allocated(self))
+ {
+ libmemcached_free(memc, self);
+ }
+
+ return NULL;
+ }
+
+ memcached_set_initialized(self, true);
+
+ WATCHPOINT_ASSERT(self->string == self->end);
+
+ return self;
+}
+
+static memcached_return_t memcached_string_append_null(memcached_string_st& string)
+{
+ if (memcached_failed(_string_check(&string, 1)))
+ {
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ *string.end= 0;
+
+ return MEMCACHED_SUCCESS;
+}
+
+static memcached_return_t memcached_string_append_null(memcached_string_st *string)
+{
+ if (memcached_failed(_string_check(string, 1)))
+ {
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ *string->end= 0;
+
+ return MEMCACHED_SUCCESS;
+}
+
+memcached_return_t memcached_string_append_character(memcached_string_st *string,
+ char character)
+{
+ if (memcached_failed(_string_check(string, 1)))
+ {
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ *string->end= character;
+ string->end++;
+
+ return MEMCACHED_SUCCESS;
+}
+
+memcached_return_t memcached_string_append(memcached_string_st *string,
+ const char *value, size_t length)
+{
+ if (memcached_failed(_string_check(string, length)))
+ {
+ return MEMCACHED_MEMORY_ALLOCATION_FAILURE;
+ }
+
+ 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)
+{
+ if (memcached_string_length(string) == 0)
+ {
+ return NULL;
+ }
+
+ char *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;
+}
+
+bool memcached_string_set(memcached_string_st& string, const char* value, size_t length)
+{
+ memcached_string_reset(&string);
+ if (memcached_success(memcached_string_append(&string, value, length)))
+ {
+ memcached_string_append_null(string);
+ return true;
+ }
+
+ return false;
+}
+
+void memcached_string_reset(memcached_string_st *string)
+{
+ string->end= string->string;
+}
+
+void memcached_string_free(memcached_string_st& ptr)
+{
+ memcached_string_free(&ptr);
+}
+
+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);
+}
+
+bool memcached_string_resize(memcached_string_st& string, const size_t need)
+{
+ return memcached_success(_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_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;
+}
+
+const char *memcached_string_value(const memcached_string_st& self)
+{
+ return self.string;
+}
+
+char *memcached_string_take_value(memcached_string_st *self)
+{
+ char* value= NULL;
+
+ assert_msg(self, "Invalid memcached_string_st");
+ if (self)
+ {
+ if (memcached_string_length(self))
+ {
+ // If we fail at adding the null, we copy and move on
+ if (memcached_failed(memcached_string_append_null(self)))
+ {
+ return NULL;
+ }
+
+ value= self->string;
+ _init_string(self);
+ }
+ }
+
+ return value;
+}
+
+char *memcached_string_value_mutable(const memcached_string_st *self)
+{
+ return self->string;
+}
+
+char *memcached_string_c_str(memcached_string_st& self)
+{
+ return self.string;
+}
+
+void memcached_string_set_length(memcached_string_st *self, size_t length)
+{
+ self->end= self->string +length;
+}
+
+void memcached_string_set_length(memcached_string_st& self, const size_t length)
+{
+ assert(self.current_size >= length);
+ size_t set_length= length;
+ if (self.current_size > length)
+ {
+ if (memcached_failed(_string_check(&self, length)))
+ {
+ set_length= self.current_size;
+ }
+ }
+ self.end= self.string +set_length;
+}