CN101772207A - Method for mobile terminal equipment to identify file - Google Patents
Method for mobile terminal equipment to identify file Download PDFInfo
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- CN101772207A CN101772207A CN200810208134A CN200810208134A CN101772207A CN 101772207 A CN101772207 A CN 101772207A CN 200810208134 A CN200810208134 A CN 200810208134A CN 200810208134 A CN200810208134 A CN 200810208134A CN 101772207 A CN101772207 A CN 101772207A
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Abstract
The invention discloses a method for mobile terminal equipment to identify a file. The method is characterized in that: A. a file name to be identified is obtained when in storage and is then processed by a hash algorithm, a result obtained by the hash algorithm is used as an identification of the file, and the identification is stored into a set storage space; B. the known file name is processed by the hash algorithm when in use, and comparison with the stored result obtained by the hash algorithm is carried out to obtain the file specified by the identification. The method has the following advantages: the storage space of the mobile terminal equipment can be well saved, and the using of an RAM is reduced as well.
Description
Technical field
The present invention relates generally to moving communicating field, refers to the method at the mobile terminal equipment to identify file in this field especially.
Background technology
Communication terminal has possessed the ability of operation mass-memory unit mostly at present, and what the mass-memory unit that uses on communication terminal was common comprises: built-in memory space, T card, SD card, mmc card etc.The ability of operation mass-memory unit makes communication terminal can be easy to play MP3, play functions such as MP4 and reading electronic book, these functions have become indispensable function on the communication terminal, have enriched the amusement function of communication terminal greatly.The management of above-mentioned mass-memory unit all is to carry out in popular file system mode, common file system mode is FAT16 and two kinds of forms of FAT32, its management to file all is based on catalogue and file name PC operating system that carry out and common compatibility.
Communication terminal is when carrying out storage device management, a common action is exactly to identify or describe a file, for example: when a mp3 file is set at incoming ring tone, this is the sign of a mp3 file to be write of communication terminal inside set in the storage area and realize; The e-book function of communication terminal is wanted can write down the position of each e-book reading last time and can set bookmark, similarly this last time reading position and bookmark description also be of communication terminal inside to be write in the sign of an e-book and position establish present communication terminal just is to use file system to the identification method of file file name, the maximum filename degree of common FAT16 file system is 255 uincode codings, and the sign of using filename to make file can consume very big system's shelf space.With the e-book is example, if we have 100 e-book, each e-book need write down one last time reading position and four bookmarks, the memory space of its required use is
5×100×(255×2+4)＝257000(byte)
Calculation specifications:
5: one previous position and 4 bookmarks
This book of 100:100
255 * 2: unicode accounts for two bytes to be decided to realize in the storage area
4: location expression.
Communication terminal is set memory space and is commonly realized with FLASH equipment, generally smaller, the space of the 250K that calculates above can take the resource of a large amount of preciousnesses, and the information that when operation preserves also will be read earlier among the RAM, also can expend a large amount of ram spaces, because the content that reads is more, the speed of read-write also has certain influence simultaneously.
Summary of the invention
One object of the present invention is to provide a kind of method of mobile terminal equipment to identify file, can use memory space identification document seldom.
To achieve these goals, technical scheme of the present invention is as follows: a kind of method of mobile terminal equipment to identify file, it is characterized in that: during preservation, behind the filename that obtains to identify, filename is handled with the hash algorithm, obtain the sign of result with the hash algorithm, this sign is saved in the setting memory space as file; In use, the result to known file masterpiece hash algorithm and preservation hash relatively obtains identifying specified file.
Because how many characters no matter the characteristics of hash algorithm import, the result who calculates is a regular length, is generally 4 byte.And it has good randomness, in numerical space 2
32Size does not have the result of calculation of repetition down substantially.So original needs 255 * 2byte (filename) just can identify a file, only need 4byte just passable now, 100 files were wanted the memory space of 257000byte originally, now as long as 4000byte, the invention has the advantages that can fine saving mobile terminal device memory space, also reduced the use of RAM simultaneously.
Description of drawings
Fig. 1 preserves the bookmark flow chart during the e-book of the embodiment of the invention is used.
Fig. 2 uses the bookmark flow chart during the e-book of the embodiment of the invention is used.
Embodiment
Below in conjunction with drawings and Examples the present invention is elaborated.
A kind of method of mobile terminal equipment to identify file, it is characterized in that: when A, preservation, behind the filename that obtains to identify, filename is handled with the hash algorithm, obtain the sign of result with the hash algorithm, this sign is saved in the setting memory space as file; B, when using, known file masterpiece hash algorithm and the result that preserves hash are relatively obtained identifying specified file.
According to one embodiment of present invention, steps A comprises: a, user set bookmark to the book of current reading; B, obtain the filename of the book of current reading; C, to the computing of file masterpiece hash algorithm, obtain 32 result, as file identification; The sign of d, this document and the position of current reading save as bookmark data.Step B comprises: e, read e-book tabulation; F, user select a bookmark; G, read bookmark data from memory space, this bookmark data comprises file identification and reading position; H, from e-book tabulation, read a filename; The hash arithmetic result of i, calculating this document name; J, with file identification relatively; K, then read next filename for unequal, and change i as the result of j; L, then open file and jump to corresponding reading position for equating by this document name as the result of j.
Need obtain handling the tabulation of file when using this method earlier, for most of mobile communication terminal device, the application file fixed placement of a class is in one or several catalogues, and for example, the file of e-book may be placed in the catalogue of ebook.And on user's use flow process, also be will see listed files earlier, just can select a file to read afterwards.
The method that obtains listed files can be used general file system interface function, and present file system is all supported.
For mobile communication terminal device, its operational capability is not strong, in order to reduce the time of HASH computing, the function of hash is not selected too complicated, simultaneously in order to reduce hash result's replication problem, can use two different hash functions to calculate respectively, two are compared together in the time of relatively, can effectively solve replication problem.Adoptable hash algorithm is as MD2, N-Hash, RIPE-MD, HAVAL etc., and its value of calculating all is inequality, adopts same hash algorithm when therefore in general preserving and when using.
After the flow process of pressing Fig. 1 produces the result of hash, can be saved in setting data zone commonly used according to the different choice of own system during preservation, because a storage area seldom can be selected more freely in the space of using at present.The form of preserving can be that file also can be a blocks of data, and the medium of preservation also can be arbitrarily.
Though should be noted that the be treated to embodiment of the present invention, be not limited to the application of e-book with e-book.
Claims (3)
1. the method for a mobile terminal equipment to identify file, it is characterized in that: when A, preservation, behind the filename that obtains to identify, filename is handled with the hash algorithm, obtain the sign of result with the hash algorithm, this sign is saved in the setting memory space as file; B, when using, known file masterpiece hash algorithm and the result that preserves hash are relatively obtained identifying specified file.
2. the method for mobile terminal equipment to identify file as claimed in claim 1 is characterized in that steps A comprises: a, user set bookmark to the book of current reading; B, obtain the filename of the book of current reading; C, to the computing of file masterpiece hash algorithm, obtain 32 result, as file identification; The sign of d, this document and the position of current reading save as bookmark data; Step B comprises: e, read e-book tabulation; F, user select a bookmark; G, read bookmark data from memory space, this bookmark data comprises file identification and reading position; H, from e-book tabulation, read a filename; The hash arithmetic result of i, calculating this document name; J, with file identification relatively; K, then read next filename for unequal, and change i as the result of j; L, then open file and jump to corresponding reading position for equating by this document name as the result of j.
3. the method for mobile terminal equipment to identify file as claimed in claim 1 is characterized in that the hash algorithm comprises MD2, N-Hash, RIPE-MD, HAVAL.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810208134A CN101772207A (en) | 2008-12-29 | 2008-12-29 | Method for mobile terminal equipment to identify file |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810208134A CN101772207A (en) | 2008-12-29 | 2008-12-29 | Method for mobile terminal equipment to identify file |
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| Publication Number | Publication Date |
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| CN101772207A true CN101772207A (en) | 2010-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200810208134A Pending CN101772207A (en) | 2008-12-29 | 2008-12-29 | Method for mobile terminal equipment to identify file |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014161308A1 (en) * | 2013-07-19 | 2014-10-09 | 中兴通讯股份有限公司 | Ring tone setting method, device and terminal |
| CN107172265A (en) * | 2017-05-12 | 2017-09-15 | 北京安云世纪科技有限公司 | A kind of call blocking method, device and mobile terminal |
| WO2019019341A1 (en) * | 2017-07-27 | 2019-01-31 | 平安科技（深圳）有限公司 | File storage method, terminal and computer readable storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101030200A (en) * | 2006-03-02 | 2007-09-05 | 海尔集团公司 | Method for searching number mark in mobile terminal |
| CN101051913A (en) * | 2007-01-12 | 2007-10-10 | 北京时代亮点科技发展有限公司 | Reciprocal network transmission method facing moving terminal |
| CN101174264A (en) * | 2006-10-31 | 2008-05-07 | 英业达股份有限公司 | Multimedia bookmark producing system and method thereof |
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2008
- 2008-12-29 CN CN200810208134A patent/CN101772207A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101030200A (en) * | 2006-03-02 | 2007-09-05 | 海尔集团公司 | Method for searching number mark in mobile terminal |
| CN101174264A (en) * | 2006-10-31 | 2008-05-07 | 英业达股份有限公司 | Multimedia bookmark producing system and method thereof |
| CN101051913A (en) * | 2007-01-12 | 2007-10-10 | 北京时代亮点科技发展有限公司 | Reciprocal network transmission method facing moving terminal |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014161308A1 (en) * | 2013-07-19 | 2014-10-09 | 中兴通讯股份有限公司 | Ring tone setting method, device and terminal |
| CN104301503A (en) * | 2013-07-19 | 2015-01-21 | 中兴通讯股份有限公司 | Ringtone setting method and device and terminal |
| CN104301503B (en) * | 2013-07-19 | 2019-07-16 | 中兴通讯股份有限公司 | A kind of the tinkle of bells setting method, device and terminal |
| CN107172265A (en) * | 2017-05-12 | 2017-09-15 | 北京安云世纪科技有限公司 | A kind of call blocking method, device and mobile terminal |
| WO2019019341A1 (en) * | 2017-07-27 | 2019-01-31 | 平安科技（深圳）有限公司 | File storage method, terminal and computer readable storage medium |
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Application publication date: 20100707 |