stm32移植protobufnanopb-0.3.8-windows-x86操作说明

stm32移植protobuf（nanopb-0.3.8-windows-x86）操作说明

/* pb_common.c: Common support functions for pb_encode.c and pb_decode.c.
 *
 * 2014 Petteri Aimonen 
 */

#include “pb_common.h“

bool pb_field_iter_begin（pb_field_iter_t *iter const pb_field_t *fields void *dest_struct）
{
    iter->start = fields;
    iter->pos = fields;
    iter->required_field_index = 0;
    iter->dest_struct = dest_struct;
    iter->pData = （char*）dest_struct + iter->pos->data_offset;
    iter->pSize = （char*）iter->pData + iter->pos->size_offset;
    
    return （iter->pos->tag != 0）;
}

bool pb_field_iter_next（pb_field_iter_t *iter）
{
    const pb_field_t *prev_field = iter->pos;

    if （prev_field->tag == 0）
    {
        /* Handle empty message types where the first field is already the terminator.
         * In other cases the iter->pos never points to the terminator. */
        return false;
    }
    
    iter->pos++;
    
    if （iter->pos->tag == 0）
    {
        /* Wrapped back to beginning reinitialize */
        （void）pb_field_iter_begin（iter iter->start iter->dest_struct）;
        return false;
    }
    else
    {
        /* Increment the pointers based on previous field size */
        size_t prev_size = prev_field->data_size;
    
        if （PB_HTYPE（prev_field->type） == PB_HTYPE_ONEOF &&
            PB_HTYPE（iter->pos->type） == PB_HTYPE_ONEOF &&
            iter->pos->data_offset == PB_SIZE_MAX）
        {
            /* Don‘t advance pointers inside unions */
            return true;
        }
        else if （PB_ATYPE（prev_field->type） == PB_ATYPE_STATIC &&
                 PB_HTYPE（prev_field->type） == PB_HTYPE_REPEATED）
        {
            /* In static arrays the data_size tells the size of a single entry and
             * array_size is the number of entries */
            prev_size *= prev_field->array_size;
        }
        else if （PB_ATYPE（prev_field->type） == PB_ATYPE_POINTER）
        {
            /* Pointer fields always have a constant size in the main structure.
             * The data_size only applies to the dynamically allocated area. */
            prev_size = sizeof（void*）;
        }

        if （PB_HTYPE（prev_field->type） == PB_HTYPE_REQUIRED）
        {
            /* Count the required fields in order to check their presence in the
             * decoder. */
            iter->required_field_index++;
        }
    
        iter->pData = （char*）iter->pData + prev_size + iter->pos->data_offset;
        iter->pSize = （char*）iter->pData + iter->pos->size_offset;
        return true;
    }
}

bool pb_field_iter_find（pb_field_iter_t *iter uint32_t tag）
{
    const pb_field_t *start = iter->pos;
    
    do {
        if （iter->pos->tag == tag &&
            PB_LTYPE（iter->pos->type） != PB_LTYPE_EXTENSION）
        {
            /* Found the wanted field */
            return true;
        }
        
        （void）pb_field_iter_next（iter）;
    } while （iter->pos != start）;
    
  

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     目录           0  2018-01-19 10:15  protobuf\
     目录           0  2018-01-19 10:13  protobuf\nanopb-0.3.8-windows-x86\
     文件         521  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\.gitignore
     文件        1520  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\.travis.yml
     文件        1199  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\AUTHORS
     文件         361  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\BUILD
     文件       11923  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\CHANGELOG.txt
     文件        3098  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\CMakeLists.txt
     文件        1259  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\CONTRIBUTING.md
     文件         918  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\LICENSE.txt
     文件        3048  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\README.md
     目录           0  2017-04-25 09:01  protobuf\nanopb-0.3.8-windows-x86\docs\
     文件         302  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\Makefile
     文件       16812  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\concepts.rst
     文件      117174  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\generator_flow.svg
     文件        5512  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\index.rst
     目录           0  2017-04-25 09:01  protobuf\nanopb-0.3.8-windows-x86\docs\logo\
     文件       14973  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\logo\logo.png
     文件      105375  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\logo\logo.svg
     文件         854  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\logo\logo16px.png
     文件        2577  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\logo\logo48px.png
     文件        3836  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\lsr.css
     文件         361  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\menu.rst
     文件       11827  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\migration.rst
     文件       35845  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\reference.rst
     文件        3938  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\docs\security.rst
     目录           0  2017-04-25 09:01  protobuf\nanopb-0.3.8-windows-x86\examples\
     目录           0  2017-04-25 09:01  protobuf\nanopb-0.3.8-windows-x86\examples\cmake_simple\
     文件         614  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\examples\cmake_simple\CMakeLists.txt
     文件         551  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\examples\cmake_simple\README.txt
     文件        2284  2017-03-06 00:28  protobuf\nanopb-0.3.8-windows-x86\examples\cmake_simple\simple.c
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