CN105808534B - A kind of method that isomeric data merges extraction initial data in file - Google Patents
A kind of method that isomeric data merges extraction initial data in file Download PDFInfo
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- CN105808534B CN105808534B CN201410824980.7A CN201410824980A CN105808534B CN 105808534 B CN105808534 B CN 105808534B CN 201410824980 A CN201410824980 A CN 201410824980A CN 105808534 B CN105808534 B CN 105808534B
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Abstract
A kind of method that isomeric data merges extraction initial data in file, process are as follows: S1: obtains isomeric data fusion file and file size；S2: file is read in a binary fashion and is stored in file content byte arrays；Apply for that a byte arrays are DataFlagArray, initialize array makes each array element be n；Apply for original content byte arrays, it is assumed that be FileDataArray；S3: filename, the initial position, length that various isomeric data bodies are stored are obtained；S4: each isomeric data body is screened；Judge that isomeric data body is for example just to execute operation in byte arrays DataFlagArray whether in isomeric data fusion file；S5: obtaining each element DataFlag in byte arrays DataFlagArray, judge whether the data of DataFlag are equal to n, if being equal to n, is assigned to the corresponding position of FileDataArray in application original content byte arrays；S6: initial data is successfully obtained.The present invention have many advantages, such as principle it is simple, it is versatile, can simplify operation, improve module design efficiency.
Description
Technical field
Present invention relates generally to technical field of memory, refer in particular to a kind of merge in file from isomeric data and extract initial data
Method.
Background technique
With the fast development of IT technology, file system is constantly improve, and the range that application field covers is also increasingly wider,
When carrying out data transmission or transmitting, it may need to merge the data of a variety of different structures in a file.And it was merging
Cheng Zhong, the initial data of this document tend not to provide corresponding feature to be extracted.For example, in document transmission process
In, it is sometimes desirable to the digital digest of this document is added to any possible position in file in different phase, is also needed sometimes
Other flag datas are added to any possible position in this document, require an effective method energy thus
It is enough to extract the initial data of file, and the purposes without prejudice to file initial data is ready.
Currently, being all made of same structured data in the file of existing file system, isomeric data being merged
File, it is desirable to provide the start memory location of each isomeric data and length and dependency structure.If the data of original document
If body does not provide corresponding feature, the process of extraction document initial data is extremely complex, inefficiency.
Summary of the invention
The technical problem to be solved in the present invention is that, for technical problem of the existing technology, the present invention provides one
Kind of principle is simple, it is versatile, can simplify operation, improve the isomeric data fusion file of module design efficiency in extract it is original
The method of data.
In order to solve the above technical problems, the invention adopts the following technical scheme:
A kind of method that isomeric data merges extraction initial data in file, process are as follows:
S1: isomeric data fusion file and file size are obtained；
S2: isomeric data fusion file is read in a binary fashion and is stored in file content byte arrays, it is assumed that
File content byte arrays are IntrojectedFileArray；Apply for a byte arrays, it is assumed that it is DataFlagArray,
Length is Length, and initialize array makes each array element be n, and n is the number for being greater than 1 less than 256；Apply in original
Hold byte arrays, it is assumed that are as follows: FileDataArray；
S3: filename, the initial position StartPosition, length that various isomeric data bodies are stored are obtained
DataLength；
S4: each isomeric data body is screened；Judge whether isomeric data body merges in file in isomeric data,
If be just arranged in byte arrays DataFlagArray from marked as StartPosition to StartPosition+
The element data of DataLength be m, m be different from n be more than or equal to zero, the number less than or equal to 255；Last is executed
After a isomeric data body, it is transferred to next step；
S5: each element DataFlag in byte arrays DataFlagArray is obtained one by one, judges the number of DataFlag
According to whether n is equal to, if being equal to n, it is assigned to the correspondence position of FileDataArray in application original content byte arrays
It sets；Until completing the judgement of all elements DataFlag；
S6: successfully obtaining initial data, is output to external interface.
As a further improvement of the present invention: the detailed process of the step S4 are as follows:
S401: setting I=1, i.e., since first isomeric data body；
S402: storage file name, the initial position StartPosition, length of i-th isomeric data body are obtained
DataLength；
S403: judging whether isomeric data body I is stored in the fusion file, if so, just in byte arrays
DataFlagArray executes operation, otherwise enters in next step；
S404: setting i=i+1 executes S402.
As a further improvement of the present invention: the detailed process of the step S5 are as follows:
S501: assuming that the element in byte arrays DataFlagArray is DataFlag, i-th element is DataFlag_
i；Assuming that i-th element is IntrojectedFlag_i in file content byte arrays IntrojectedFileArray；If I=
1；Obtain the element number that DataFlag_i is n, it is assumed that be FileDataLength；Apply for original content byte arrays, it is long
Degree is FileDataLength, it is assumed that is that j-th of element is FileData_j in FileDataArray；Set j=0；
S502: DataFlag_i is obtained；
S503: judging whether the data of DataFlag_i are equal to n, if being equal to n, into next step, is otherwise transferred to S506；
S504: setting FileData_j=IntrojectedFlag_i；
S505: setting J=j+1；
S506: judging whether i is equal to FileDataLength, if unequal, into next step, otherwise completes operation；
S507: setting i=i+1；It is transferred to S502.
Compared with the prior art, the advantages of the present invention are as follows:
1, original data extraction method is not necessarily to raw data file after application in isomeric data of the invention fusion file
Founder provides any relevant data volume attribute, and addition isomeric data body person can restore initial data like clockwork,
The conjunction coupling between raw data file founder and isomeric data body adder is thus greatly reduced, module is improved
The efficiency of design.
2, original data extraction method is after application in isomeric data of the invention fusion file, in the transmitting for carrying out file
Or in transmission process, in each addition isomeric data level, any addition isomeric data body person, it is only necessary to which offer is added different
It is equal that structure data volume stores the filename of file, isomeric data body storage initial position and length, the data acquisition person of latter level
The initial data of previous level can smoothly be restored.And so on, if all addition isomeric data body persons are each provided with text
Part name, initial position and length, then the initial data in any file available per capita.
Detailed description of the invention
Fig. 1 is flow diagram of the present invention in specific application example.
Fig. 2 is logic diagram of the present invention in specific application example.
Specific embodiment
The present invention is described in further details below with reference to Figure of description and specific embodiment.
As depicted in figs. 1 and 2, the method that initial data is extracted in a kind of isomeric data of the invention fusion file, stream
Journey are as follows:
S1: isomeric data fusion file and file size are obtained；Assuming that length is IntrojectedFilelength.
S2: isomeric data fusion file is read in a binary fashion and is stored in file content byte arrays, it is assumed that
File content byte arrays are IntrojectedFileArray；Apply for a byte arrays, it is assumed that it is DataFlagArray,
Length is Length, and initialize array makes each array element be n, and n is the number for being greater than 1 less than 256.Apply in original
Hold byte arrays, it is assumed that are as follows: FileDataArray；
S3: filename, the initial position StartPosition, length that various isomeric data bodies are stored are obtained
DataLength；Assuming that there is I isomeric data body；
S4: each isomeric data body is screened；Judge whether isomeric data body merges in file in isomeric data,
If be just arranged in byte arrays DataFlagArray from marked as StartPosition to StartPosition+
The element data of DataLength be m, m be different from n be more than or equal to zero, the number less than or equal to 255；Last is executed
After a isomeric data body, it is transferred to next step；
S5: each element DataFlag in byte arrays DataFlagArray is obtained one by one, judges the number of DataFlag
According to whether n is equal to, if being equal to n, it is assigned to the correspondence position of FileDataArray in application original content byte arrays
It sets；Until completing the judgement of all elements DataFlag；
S6: successfully obtaining initial data, is output to external interface.
The present invention in specific application, the detailed process of step S4 are as follows:
S401: setting I=1, i.e., since first isomeric data body；
S402: storage file name, the initial position StartPosition, length of i-th isomeric data body are obtained
DataLength；
S403: judging whether isomeric data body I is stored in the fusion file, if so, just in byte arrays
DataFlagArray executes operation, otherwise enters in next step；
S404: setting i=i+1 executes S402.
The present invention in specific application, the detailed process of step S5 are as follows:
S501: assuming that the element in byte arrays DataFlagArray is DataFlag, i-th element is DataFlag_
i；Assuming that i-th element is IntrojectedFlag_i in file content byte arrays IntrojectedFileArray；If I=
1；Obtain the element number that DataFlag_i is n, it is assumed that be FileDataLength；Apply for original content byte arrays, it is long
Degree is FileDataLength, it is assumed that is that j-th of element is FileData_j in FileDataArray；Set j=0；
S502: DataFlag_i is obtained；
S503: judging whether the data of DataFlag_i are equal to n, if being equal to n, into next step, is otherwise transferred to S506；
S504: setting FileData_j=IntrojectedFlag_i；
S505: setting J=j+1；
S506: judging whether i is equal to FileDataLength, if unequal, into next step, otherwise completes operation；
S507: setting i=i+1；It is transferred to S502.
The above is only the preferred embodiment of the present invention, protection scope of the present invention is not limited merely to above-described embodiment,
All technical solutions belonged under thinking of the present invention all belong to the scope of protection of the present invention.It should be pointed out that for the art
For those of ordinary skill, several improvements and modifications without departing from the principles of the present invention should be regarded as protection of the invention
Range.
Claims (3)
1. extracting the method for initial data in a kind of isomeric data fusion file, which is characterized in that process are as follows:
S1: isomeric data fusion file and file size are obtained；
S2: isomeric data fusion file is read in a binary fashion and is stored in file content byte arrays, it is assumed that file
Content byte arrays are IntrojectedFileArray；Apply for a byte arrays, it is assumed that be DataFlagArray, length
For Length, initializes byte arrays DataFlagArray and each byte arrays DataFlagArray element is made to be n, n is
It is greater than 1 number less than 256；Apply for original data content byte arrays, it is assumed that are as follows: FileDataArray；
S3: filename, initial position StartPosition, length DataLength that various isomeric data bodies are stored are obtained；
S4: each isomeric data body is screened；Judge whether isomeric data body merges in file in isomeric data, if
Just it is being arranged in byte arrays DataFlagArray from marked as StartPosition to StartPosition+
The element data of DataLength be m, m be different from n be more than or equal to zero, the number less than or equal to 255；Last is executed
After a isomeric data body, it is transferred to next step；
S5: each element DataFlag in byte arrays DataFlagArray is obtained one by one, judges that the data of DataFlag are
It is no to be equal to n, if being equal to n, the element in the file content byte arrays IntrojectedFileArray is assigned to
Corresponding position in the original data content byte arrays FileDataArray；Until completing all elements DataFlag's
Judgement；
S6: successfully obtaining initial data, is output to external interface.
2. extracting the method for initial data in isomeric data fusion file according to claim 1, which is characterized in that described
The detailed process of step S4 are as follows:
S401: setting I=1, i.e., since first isomeric data body；
S402: storage file name, the initial position StartPosition, length of i-th isomeric data body are obtained
DataLength；
S403: judging whether isomeric data body I is stored in isomeric data fusion file, if so, just in byte arrays
It is arranged in DataFlagArray from the element data marked as StartPosition to StartPosition+DataLength
For m, m be different from n be more than or equal to zero, the number less than or equal to 255, otherwise enter in next step；
S404: setting I=I+1 executes S402.
3. extracting the method for initial data in isomeric data fusion file according to claim 1 or 2, which is characterized in that
The detailed process of the step S5 are as follows:
S501: assuming that the element in byte arrays DataFlagArray is DataFlag, i-th element is DataFlag_I；It is false
If i-th element is IntrojectedFlag_I in file content byte arrays IntrojectedFileArray；If I=1；It obtains
Taking DataFlag_I is the element number of n, it is assumed that is FileDataLength；Apply for original data content byte arrays, length
For FileDataLength, it is assumed that j-th element is FileData_J in FileDataArray；Set J=0；
S502: DataFlag_I is obtained；
S503: judging whether the data of DataFlag_I are equal to n, if being equal to n, into next step, is otherwise transferred to S506；
S504: setting FileData_J=IntrojectedFlag_I；
S505: setting J=J+1；
S506: judging whether I is equal to FileDataLength, if unequal, into next step, otherwise completes operation；
S507: setting I=I+1；It is transferred to S502.
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| CN102103596A (en) * | 2009-12-18 | 2011-06-22 | 康佳集团股份有限公司 | Method for implementing file system in embedded system |
| CN102855280A (en) * | 2012-07-31 | 2013-01-02 | 北京壹人壹本信息科技有限公司 | Heterogeneous data processing method and device |
| CN103500123A (en) * | 2013-10-12 | 2014-01-08 | 浙江大学 | Parallel computation dispatch method in heterogeneous environment |
| CN103559217A (en) * | 2013-10-17 | 2014-02-05 | 北京航空航天大学 | Heterogeneous database oriented massive multicast data storage implementation method |
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Inventor after: Chen Chaolu Inventor after: Ji Anhui Inventor after: Qiao Xianhua Inventor after: Xiao Zhijun Inventor after: Chen Jianxiao Inventor after: Xu Yijing Inventor after: Liao Yun Inventor after: Wang Long Inventor after: Han Lu Inventor after: Li Bowen Inventor after: Xu Nannan Inventor before: Chen Jianxiao Inventor before: Ji Anhui Inventor before: Qiao Xianhua Inventor before: Chen Chaolu Inventor before: Xiao Zhijun Inventor before: Xu Yijing Inventor before: Liao Yun Inventor before: Wang Long Inventor before: Han Lu Inventor before: Li Bowen Inventor before: Xu Nannan |
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