+++ /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;
-}
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