.. _program_listing_file_include_rosidl_runtime_c_type_hash.h:

Program Listing for File type_hash.h
====================================

|exhale_lsh| :ref:`Return to documentation for file <file_include_rosidl_runtime_c_type_hash.h>` (``include/rosidl_runtime_c/type_hash.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   // Copyright 2023 Open Source Robotics Foundation, Inc.
   //
   // Licensed under the Apache License, Version 2.0 (the "License");
   // you may not use this file except in compliance with the License.
   // You may obtain a copy of the License at
   //
   //     http://www.apache.org/licenses/LICENSE-2.0
   //
   // Unless required by applicable law or agreed to in writing, software
   // distributed under the License is distributed on an "AS IS" BASIS,
   // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   // See the License for the specific language governing permissions and
   // limitations under the License.
   
   #ifndef ROSIDL_RUNTIME_C__TYPE_HASH_H_
   #define ROSIDL_RUNTIME_C__TYPE_HASH_H_
   
   #include <stdint.h>
   
   #include "rcutils/allocator.h"
   #include "rcutils/sha256.h"
   
   #include "rosidl_runtime_c/visibility_control.h"
   
   #define ROSIDL_TYPE_HASH_VERSION_UNSET 0
   #define ROSIDL_TYPE_HASH_SIZE RCUTILS_SHA256_BLOCK_SIZE
   
   #ifdef __cplusplus
   extern "C"
   {
   #endif
   
   typedef struct rosidl_type_hash_s
   {
     uint8_t version;
     uint8_t value[ROSIDL_TYPE_HASH_SIZE];
   } rosidl_type_hash_t;
   
   
   ROSIDL_GENERATOR_C_PUBLIC
   rosidl_type_hash_t
   rosidl_get_zero_initialized_type_hash(void);
   
   
   ROSIDL_GENERATOR_C_PUBLIC
   rcutils_ret_t
   rosidl_stringify_type_hash(
     const rosidl_type_hash_t * type_hash,
     rcutils_allocator_t allocator,
     char ** output_string);
   
   
   ROSIDL_GENERATOR_C_PUBLIC
   rcutils_ret_t
   rosidl_parse_type_hash_string(
     const char * type_hash_string,
     rosidl_type_hash_t * hash_out);
   
   #ifdef __cplusplus
   }
   #endif
   
   #endif  // ROSIDL_RUNTIME_C__TYPE_HASH_H_