CN107544799A - A kind of method being packaged to built-in function - Google Patents
A kind of method being packaged to built-in function Download PDFInfo
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- CN107544799A CN107544799A CN201710718373.6A CN201710718373A CN107544799A CN 107544799 A CN107544799 A CN 107544799A CN 201710718373 A CN201710718373 A CN 201710718373A CN 107544799 A CN107544799 A CN 107544799A
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Abstract
The present invention relates to the present invention relates to computer technology, Software Industry FIELD OF THE INVENTIONThe, a kind of method being packaged to built-in function is disclosed, it is characterised in that：Using two data structures and a state machine interface routine, the function of built-in function is realized by state machine interface routine, application program tells what this state machine interface routine will do by one of data structure（Function）, state machine interface routine go it is specific complete how to do, and responded by another data structure be made whether success or failure；The method of this encapsulation realizes the loose coupling of application program and built-in function, avoids caused by application program largely calls built-in function and safeguards with debugging the problem of difficult so that connection interface is clear between program, and is easy to asynchronous development, upgrading and transplanting convenient.
Description
Technical field
The present invention relates to computer technology, Software Industry field, more particularly to a kind of method being packaged to built-in function
。
Background technology
In field of software development, some outside storehouses introduced are often used（Commonly referred to as third party library function）.It is logical
It is often with static library（Lib）Or dynamic base（DLL）Form provide, and with can call this storehouse external function one or
More header files（h）.In this or these header file h, the built-in function that can be called is provided（Commonly referred to as API functions）'s
Data structure and data definition that function name, function parameter description and built-in function use etc..These different API built-in functions
Function and the effect in this storehouse are completed jointly, but from the point of view of function category, can be divided into the function of different stage.Some are most
The function on basis（Such as the 3rd grade of function of Fig. 1）；Some are the functions in intermediate layer（Such as the 2nd grade of function of Fig. 1）；Some are close to existing
The power function applied in fact（Such as Fig. 1 the 1st grade of function）.Intergrade function can call wherein one or more most basic letters
Number, and closest to practical application the 1st grade of function may calling section centre layer functions, even can also call some bottoms
Function（Fun_1 functions such as Fig. 1 had both called middle layer functions Fun_11, Fun_12, also called most basic function Fun_121）.
In the h header files in storehouse, the data corresponding to the API functions of the above-mentioned different stage in this storehouse can be provided and enumerated and determined
Justice, data structure definition and each can API Function return type, function name, function parameter（One function is sometimes
Time is the multiple parameters of different pieces of information structure or type）.Product development software engineer is common to do after these storehouses are taken
Method is these contents by analyzing h header files, and these storehouses and its header file are covered to the software project work of oneself product
Cheng Zhong, and according to the function name defined in header file h, function parameter and its data definition, in the software program of oneself
Quote or directly invoke these built-in functions（Including its 1st grade of function, middle layer functions or underlying basis function）.As Fig. 2 shows
Meaning, it can be seen that the incidence relation between application program and built-in function is extremely complex, that is, so-called " tight coupling occurs
Close "；If this storehouse is very simple, only a small amount of built-in function, and data parameters, data structure and the technology in this storehouse
If background is all fairly simple, then this method directly invoked or feasible.But if the technical background in this storehouse is very
It is deep, can not ensure all related product development software engineers digest in a short time this storehouse background and data structure,
If relation inside built-in function, then call these built-in functions in large quantities in consumer products program, be just difficult to avoid that appearance
The problem of parameter uses mistake or function call order mistake etc. a large amount of.It will be apparent that so in different application programs
The method for directly invoking storehouse API functions, it is a difficulty by the exploitation debugging to application software and maintenance.
The content of the invention
It is an object of the invention to provide a kind of method being packaged based on user function angle to built-in function, it is intended to solves
Certainly the problems of the prior art.
The present invention is achieved in that a kind of method being packaged to built-in function, it is characterised in that：Using two data
Structure and a state machine interface routine, the function of built-in function is realized by state machine interface routine, and application program passes through wherein
One data structure tells what this state machine interface routine will do（Function）, state machine interface routine go it is specific complete
Into how doing, and responded by another data structure be made whether success or failure.
Further, the user's request that a data structure storage application program is sent（Command function）And parameter, with
Data necessary to expressing " what does ".At least one argument table of the data structure reaches user's request（Command function）Volume
Code, the quantity n of corresponding user's request.Its coded format is arranged by consulting, and does not limit whether digital, letter or other codings；
I.e. this coding can be continuous, can also be discontinuous, but must be unique corresponding.
Further, the result that a data structure storage configuration machine interface routine performs to some command function, with
Data necessary to expression " how be made ".User's request performed by least one variable of the data structure is corresponding（Function
Order）Coding, the quantity n of corresponding user's request.Its coded format through negotiation arrange, do not limit whether numeral, letter or
Other codings；I.e. this coding can be continuous, can also be discontinuous, but must be unique corresponding.
Further, data structure A is the data of application program write-in, and data structure B is state machine interface journey
The data of sequence write-in.Application program may only read but cannot write data to data structure B；State machine interface routine
It may only read but data structure A cannot be write data to.
Further, state machine interface routine is made up of at least 1 " listening state ", n " functional status ".Prison
Listen state to be responsible for monitoring and check whether upper level applications send new command function request, and this command request is analyzed
After reasonability, the functional status of one of this n request is jumped to.Different functional statuses then completes the calling to built-in function, real
The command request of this existing function.
Further, application program is not to directly invoke built-in function, but is interacted with the two data structures.By
One bank interface state machine program goes specifically to call storehouse API functions.In order to which maintenance is convenient, this storehouse can generally be connect
Mouth state machine program is individually write in a file, is programmed by expert engineer or is safeguarded.Can also be by this bank interface
State machine program is write as new storehouse compiled format.If bank interface state machine program to be compiled into new storehouse, this storehouse just unlike
Common storehouse, it does not have any API functions for being available for calling, can only see two data structures A and B of both sides' interaction.
Compared with prior art, the method for this encapsulation realizes the loose coupling of application program and built-in function, and avoiding should
Maintenance is with debugging the problem of difficult caused by built-in function is largely called with program.The method for packing makes interface circle between calling program
Face is clear, and is easy to asynchronous development, upgrading and transplanting convenient.
Brief description of the drawings
Fig. 1 is the schematic diagram of prior art；
Fig. 2 is the schematic diagram of prior art；
Fig. 3 is the schematic diagram of the interface state machine program description figure of the present invention；
Fig. 4 is the schematic diagram of the package shelf composition of the present invention；
Fig. 5 is the schematic diagram of the bank interface state machine program figure of the present invention.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The method of built-in function encapsulation provided by the invention, is adapted to computer, tablet personal computer, smart mobile phone, various insertions
Formula smart machine.With reference to the embodiment of a media player, the present invention is described in detail.
Shown in reference picture 3, Fig. 4 and Fig. 5, preferred embodiment is provided for the present invention.
Media player is a popular electronic product.Videocorder, CD machines, MP3, MP4 of early stage, and intelligent hand
Machine can be referred to as the media player of different times.With advances in technology, there is the media data of various coded formats
Deposit file, or the form of different encoding and decoding performances.Such as the form of audio has CD, VOB, 3GP, WAV, MP1/MP2/
MP3, APE, MIDI, WMA, RealAudio, VQF etc..Video similarly has a large amount of different forms, such as AVI, MPEG/
MPG/DAT, JPEG, RM, WMV, MOV, H.264, H.265 etc..In fact, most products PHP also is difficult to
The form of audios all in the world, video data file is distinguished clear.With the continuous progress of technology, compression there is also
Than bigger, the good video/audio encoding and decoding algorithm of fidelity.If different program points goes to call some in the application
Algorithm built-in function, the basic function how played with recording is not only handled, format analysis, broadcasting ginseng also to played file
Several settings（Including sampled voice frequency, sound channel, sound velocity, intelligent echo cancellor, wave filter etc.）, then this product is soft
Part development and maintenance workload is very huge.
In fact, from the user perspective finally used, it is indifferent to or is unfamiliar with these forms, only it is expected to accomplish pair
Some file carries out normal play, quickly plays, suspends, continuing the demand that plays, record；The data file file of broadcasting exists
Where deposit, which device resource source is the equipment of broadcasting be on.
According to the spirit of patent of the present invention, we can define following data structure A：
typedef struct
{
MEDIA_CMD cmd;// user function demand（Order）Coding
MEDIA_FILE file;// it is to be played or record file name（Deposit path）
MEDIA_SOURCE source;// broadcasting or the setting resource name in path
}A;
Amedia_A;// definition data structure body A global variable media_A
With following enumeration definition user's request（Order）Coding：（Additionally one idle commands IDLE of increase）
typedef enum
{
PLAY=0, // normal play
FAST_PLAY, // quickly play
PAUSE, // pause play
CONTINUE, // continue to play
RECORD, // record
IDLE // free time
} MEDIA_CMD;// user function demand（Order）Coding
File f ile is the path deposited with string representation：
typedef unsigned char* MEDIA_FILE；
The device resource source of broadcasting, expressed with a device id：
typedef unsigned short MEDIA_SOURCE;
Similarly, according to the spirit of patent of the present invention, we can define following data structure B：
typedef struct
{
MEDIA_CMD exec_cmd;// it is carrying out user function demand（Order）Coding
EXEC_STATE exec_state;// the functional status being carrying out
OK_ERROR exec_result;// run succeeded or failure flags
ERROR_CODE error_code;// perform the error code to fail
} B;
B media_B;// definition data structure body B global variable media_B
EXEC_STATE is enumerated in definition, expresses following state machine：
typedef enum
{
WAIT_STATE=0, // listening state
PLAY_STATE, // normal playing status
FAST_PLAY_STATE, // quick broadcast state
PAUSE_PLAY_STATE, // pause broadcast state
CONTINUE_STATE, // continue broadcast state
RECORD_STATE // recording state
} EXEC_STATE;
OK_ERROR is enumerated in definition：
typedef enum
{
ERROR = 0,
OK = 1
}
Definition performs the error code of failure（Citing）：
typedef enum
{
ERROR_FILE_NOFOUND=0, // file can not find
ERROR_SOURCE_NOOPEN=1, // device resource are not switched on
ERROR_UNKNOWN_FORMAT=2, // file format are not supported
}
Fig. 3 is shown in interface state machine program description：
Interface state machine program（Assuming that entitled StateMachine ()）, it runs in the major cycle of application program.Initially
Change media_B. exec_state=WAIT_STATE（If it is necessary, it can also additionally increase an init state）.
Its " listening state " WAIT_STATE, constantly read data structure A command request（media_A.cmd）Whether it is one
Individual effective order（PLAY、FAST_PLAY、PAUSE、CONTINUE、RECORD）, then one is gone to corresponding to the effective order
Functional status（PLAY_STATE、FAST_PLAY_STATE 、PAUSE_STATE、CONTINUE_STATE、RECORD_
STATE）.In these functional statuses, according to the API functions of audio frequency and video algorithm place offer（Such as check and read to be played
File f ile function Open_file, Study document form function Analyse_Format, the function for playing different-format
PLAY_CD/PLAY_WAV/Play_MP3/Play_APE/Play_MIDI/Play_WMA etc., sampled voice frequency, sound are set
Road, the function Set_Parameter of sound velocity, the intelligent echo cancellor function Set_Echo of setting, wave filter Set_Filter
Deng）.When these functions perform normal, then state, the order for telling media_B to be carrying out are responded to data structure B
exec_cmd（Its corresponding media_A. cmd）, be carrying out functional status exec_state, run succeeded or failure mark
Will exec_result simultaneously provides corresponding error code to error_code in failure.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement made within refreshing and principle etc., should be included in the scope of the protection.
Claims (6)
- A kind of 1. method being packaged to built-in function, it is characterised in that：Connect using two data structures and a state machine Mouth program, the function of built-in function is realized by state machine interface routine, and application program tells this by one of data structure What individual state machine interface routine will do（Function）, state machine interface routine go it is specific complete how to do, and by addition One data structure respond be made whether success or failure.
- A kind of 2. method being packaged to built-in function as claimed in claim 1, it is characterised in that：One data structure is deposited Put the user's request that application program is sent（Command function）And parameter, to express data necessary to " what does ", the data knot At least one argument table of structure body reaches user's request（Command function）Coding, the quantity n of corresponding user's request, its coded format By consulting to arrange, whether digital, letter or other codings are not limited；I.e. this coding can be continuous, can also be not Continuously, but must be unique corresponding.
- A kind of 3. method being packaged to built-in function as claimed in claim 1, it is characterised in that：One data structure is deposited The result that state machine interface routine performs to some command function is put, with data, the data necessary to expression " how be made " User's request performed by least one variable of structure is corresponding（Command function）Coding, the quantity n of corresponding user's request, its Coded format is arranged by consulting, and does not limit whether digital, letter or other codings；I.e. this coding can be it is continuous, It can be discontinuous, but must be unique corresponding.
- A kind of 4. method being packaged to built-in function as claimed in claim 1, it is characterised in that：Data structure A is should With program write data, data structure B be state machine interface routine write-in data, application program may only read but Data structure B cannot be write data to；State machine interface routine may only read but cannot write data to data knot Structure body A.
- A kind of 5. method being packaged to built-in function as claimed in claim 1, it is characterised in that：State machine interface routine is It is made up of at least 1 " listening state ", n " functional status ", listening state is responsible for monitoring and checking upper level applications New command function request whether is sent, and by after this command request analysis reasonability, jumps to one of this n request Functional status, different functional statuses then complete the calling to built-in function, realize the command request of this function.
- A kind of 6. method being packaged to built-in function as claimed in claim 1, it is characterised in that：Application program is not direct Built-in function is called, but is interacted with the two data structures, is gone specifically to call storehouse by a bank interface state machine program API functions, in order to which maintenance is convenient, generally this bank interface state machine program can be individually write in a file, by Expert engineer is programmed or safeguarded, this bank interface state machine program can also be write as to new storehouse compiled format, if Bank interface state machine program is compiled into new storehouse, just unlike common storehouse, it does not have any API for being available for calling in this storehouse Function, it can only see two data structures A and B of both sides' interaction.
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2017
- 2017-08-21 CN CN201710718373.6A patent/CN107544799A/en active Pending
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| CN101980167A (en) * | 2010-10-19 | 2011-02-23 | 上海富士施乐有限公司 | Operation mode of task state machine management mechanism of embedded real-time operating system |
| CN103166824A (en) * | 2011-12-13 | 2013-06-19 | 华为技术有限公司 | Interconnection method, device and system |
| CN103885782A (en) * | 2014-04-03 | 2014-06-25 | 南京南瑞继保电气有限公司 | Visual programming page program library function packaging and reusing method |
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Application publication date: 20180105 |