# FlatMessages

**Repository Path**: sendlinux/FlatMessages

## Basic Information

- **Project Name**: FlatMessages
- **Description**: FlatMessages是一个跨平台的快速二进制报文格式，生成的报文占用内存小，无打包解包过程直接存取报文字段，普遍用于游戏、高性能应用服务器、内存受限的嵌入式和移动设备等场合。
- **Primary Language**: Unknown
- **License**: LGPL-2.1
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2014-08-26
- **Last Updated**: 2021-11-02

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

FlatMessages - Fast binary message format

1.Overview

FlatMessages is a cross-platform fast binary message format, little memory used , without packing and unpacking and can be used immediately, widely used in games, high-performance application server, memory constrained embedded and mobile devices, etc. FlatMessages allows you to directly access the message buffer in all fields, sent to the client without packaging , server access directly without unpacking message buffer in all fields.

FlatMessages currently only supports C language , the future will also support C++, Java and other languages.

FlatMessages is light and easy to use, does not depend on other third-party libraries.

The command line tools 'fmc' used to generate the C structure, and related tools functions , in the future will also support C++, Java classes.

Why use FlatMessages ?

* Compact binary stream : All field of FlatMessages message distribute in flat buffer, a field close to the next field, the layout is very compact, so the memory is very small. Command line tools 'fmc' that according to message definition, automatically generate C structure, through the pointer to directly access all of the fields in the buffer. 
* High performance : by automatically generated with C structure directly access the message buffer pointer, to avoid the communication message packaging and unpacking, so very fast, is the extreme pursuit of performance in the scene first message format. 
* Flexible message defined syntax : command line tools 'fmc' read definition file, generate specific language of the automation code, supports sub message nested, message array, such as the definition file contains the flexible configuration mode. 
* Cross-platform : FlatMessages supports WINDOWS, Linux, AIX, such as the mainstream operating system, the automation code generated by the current C, in the future will also support mainstream language C++, Java, etc.

  message buffer      ...| 4 bytes |   8 bytes   |64+1bytes|...
                              A           A            A
                              H           H            H
  C Structure variable...|int*seqno|double*amount|char*name|...

2.Install with compiling

for Linux
$ tar xvzf fmc-1.0.0.tar.gz
$ cd fmc-1.0.0
$ su
# make -f makefile.Linux install
make[1]: Entering directory `/home/calvin/exsrc/fmc-1.0.0/src'
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c util.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c main.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c fmc.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c ReadFmcFile.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c GenerateCCode.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o fmc util.o main.o fmc.o ReadFmcFile.o GenerateCCode.o -L.
cp -f fmc /usr/bin/
make[1]: Leaving directory `/home/calvin/exsrc/fmc-1.0.0/src'
make[1]: Entering directory `/home/calvin/exsrc/fmc-1.0.0/test'
make[2]: Entering directory `/home/calvin/exsrc/fmc-1.0.0/test/test1'
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.fmc.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o test test.o test.fmc.o -L.
mkdir -p /root/include
cp -f test.fmc.h /root/include/
make[2]: Leaving directory `/home/calvin/exsrc/fmc-1.0.0/test/test1'
make[2]: Entering directory `/home/calvin/exsrc/fmc-1.0.0/test/test2'
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.fmc.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o test test.o test.fmc.o -L.
cp -f test.fmc.h /root/include/
make[2]: Leaving directory `/home/calvin/exsrc/fmc-1.0.0/test/test2'
make[2]: Entering directory `/home/calvin/exsrc/fmc-1.0.0/test/test9'
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.fmc.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o test test.o test.fmc.o -L.
cp -f test.fmc.h /root/include/
make[2]: Leaving directory `/home/calvin/exsrc/fmc-1.0.0/test/test9'
make[1]: Leaving directory `/home/calvin/exsrc/fmc-1.0.0/test'

3.Basic use

3.1.Write a message definition file

[code]
$ cat test.fmc
MESSAGE	TestMessage
{
	INT	1	version
	STRING	32	name
	INT	2	oper_number
	INT	4	library_card_number
	FLOAT	4	amount
	FLOAT	8	balance
	STRING	128	remark
}
[/code]

3.2.Use the tools 'fmc' processing it and generate automation code

[code]
$ fmc -f test.fmc -c
MESSAGE TestMessage
       INT 1 version
       STRING 32 name
       INT 2 oper_number
       INT 4 library_card_number
       FLOAT 4 amount
       FLOAT 8 balance
       STRING 128 remark
ok!
$ ls
test.fmc
test.fmc.h
test.fmc.c
test.fmc.LOG.c
[/code]

3.3.Write application , compiled into executable file together, to execute

[code]
$ cat test.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "test.fmc.h"

#include "test.fmc.LOG.c"

int test()
{
	FMCCOM_TestMessage	com ;
	FMCREF_TestMessage	ref ;
	long			comlen ;
	
	/* init communication buffer */
	memset( & com , 0x00 , sizeof(FMCCOM_TestMessage) );
	
	/* client code */
	memset( & ref , 0x00 , sizeof(FMCREF_TestMessage) );
	FMCBIND_TestMessage( & com , FMCLEN_TestMessage , & ref );
	
	*(ref.version) = 1 ;
	strcpy( ref.name , "calvin" );
	*(ref.oper_number) = 12345 ;
	*(ref.library_card_number) = 1234567890 ;
	*(ref.amount) = 100.00 ;
	*(ref.balance) = 10000.00 ;
	strcpy( ref.remark , "my remark" );
	
	comlen = FMCLEN_TestMessage ;
	FMCUNBIND_TestMessage( & ref , & com , & comlen );
	
	/* ... client send communication buffer to server in '& com' with length 'comlen' ... */
	
	/* server code */
	memset( & ref , 0x00 , sizeof(FMCREF_TestMessage) );
	FMCBIND_TestMessage( & com , comlen , & ref );
	
	FMCLOG_TestMessage( & ref );
	
	return 0;
}

int main()
{
	return -test();
}
$ make
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.fmc.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o test test.o test.fmc.o -L.
$ ./test
TestMessage.version[1]
TestMessage.name[calvin]
TestMessage.oper_number[12345]
TestMessage.library_card_number[1234567890]
TestMessage.amount[100.000000]
TestMessage.balance[10000.000000]
TestMessage.remark[my remark]
[/code]

4.FlatMessages Message definition syntax

Below is an example of a comprehensive
[code]
$ cat test.fmc
MESSAGE	BankTransaction
{
	INT	1	version				DEFAULT		1
	INCLUDE head.fmc
	MESSAGE QueryTransactionDetails
	{
		MESSAGE AddonMessages ARRAY 3
		{
			STRING	64	message_text
		}
		MESSAGE TransactionDetailTitle
		{
			STRING	64	title_text	DEFAULT		"MY TITLE"
			INT	2	page_no		DEFAULT		1
			INT	2	page_size
		}
		MESSAGE TransactionDetails ARRAY 10
		{
			STRING	10	trans_date
			STRING	10	trans_time
			STRING	6	outlet_id	DEFAULT		"1001"
			STRING	20	card_no
			FLOAT	4	trans_amount
		}
	}
}
$ cat head.fmc
	MESSAGE	ResponseHeader
	{
		STRING	32	transaction_code
		INT	4	trans_jnlsno
		INT	4	response_code		DEFAULT		0
		STRING	1024	response_desc		DEFAULT		"OK"
	}
[/code]
By keyword 'DEFAULT' at the back of the field is the DEFAULT value, the function of automatic generation FMCINIT_BankTransaction batch initialization.
The field type and length currently supporte :
INT 1,2,4
FLOAT 4,8
STRING N

5.Performance pressure

Pressure environment :
CPU    : Intel(R) Core(TM) i3-3240 CPU 3.4GHz 3.4GHz
Memory : 2GB
OS     : WINDOWS XP SP3 ( VMWare 6.0.1 ( Red Hat Enterprise Linux Server release 5.4 ) )

[code]
$ cat test.fmc
MESSAGE	PersonalInfoList
{
	MESSAGE	PersonalInfo	ARRAY	37
	{
		INT	4	id
		STRING	64	name
		INT	1	age
		STRING	1	gender		DEFAULT		"M"
		INT	4	phone_num
	}
}
$ cat test.c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "test.fmc.h"
#include "test.fmc.LOG.c"

int press( long press_count )
{
	FMCCOM_PersonalInfoList	com ;
	FMCREF_PersonalInfoList	ref ;
	long			comlen ;
	long			c ;
	long			t1 , t2 , dt ;
	
	time( & t1 );
	
	memset( & com , 0x00 , sizeof(FMCCOM_PersonalInfoList) );
	comlen = sizeof(FMCCOM_PersonalInfoList) ;
	memset( & ref , 0x00 , sizeof(FMCREF_PersonalInfoList) );
	FMCBIND_PersonalInfoList( & com , comlen , & ref );
	FMCINIT_PersonalInfoList( & com , & ref );
	
	*(ref.PersonalInfo[36].id) = 1001 ;
	strcpy( ref.PersonalInfo[36].name , "Calvin" );
	*(ref.PersonalInfo[36].age) = 35 ;
	*(ref.PersonalInfo[36].phone_num) = 12345678 ;
	
	for( c = 0 ; c < press_count ; c++ )
	{
		FMCUNBIND_PersonalInfoList( & ref , & com , & comlen );
		memset( & ref , 0x00 , sizeof(FMCREF_PersonalInfoList) );
		FMCBIND_PersonalInfoList( & com , comlen , & ref );
	}
	
	FUNCNAME_FMCLOG_PersonalInfoList( & ref );
	
	time( & t2 );
	dt = t2 - t1 ;
	
	printf( "sizeof(FMCCOM_PersonalInfoList)[%d]\n" , sizeof(FMCCOM_PersonalInfoList) );
	printf( "EPLASE %ld seconds\n" , dt );
	
	return 0;
}

static void usage()
{
	printf( "USAGE : test press_count\n" );
}

int main( int argc , char *argv[] )
{
	if( argc != 1 + 1 )
	{
		usage();
		exit(7);
	}
	
	return -press( atol(argv[1]) );
}
$ make
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -I.  -c test.fmc.c
gcc -g -fPIC -O2 -Wall -Werror -fno-strict-aliasing -o test test.o test.fmc.o -L.
$ time ./test 100000000
...
PersonalInfoList.PersonalInfo[index[1]].id[1001]
PersonalInfoList.PersonalInfo[index[1]].name[Calvin]
PersonalInfoList.PersonalInfo[index[1]].age[35]
PersonalInfoList.PersonalInfo[index[1]].gender[M]
PersonalInfoList.PersonalInfo[index[1]].phone_num[12345678]
sizeof(FMCCOM_PersonalInfoList)[2812]
EPLASE 7 seconds

real    0m6.716s
user    0m6.698s
sys     0m0.013s
[/code]

6.Finally

Welcome to use, if you met with a problem or have a cool idea, please tell me, thank you ^_^

Project home page : [url]https://github.com/calvinwilliams/FlatMessages[/url]
Email             : calvinwilliams.c@gmail.com