System and method for character conversion between character sets

• US 20050184886A1
• Filed: 06/04/2004
• Published: 08/25/2005
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Computer Associates Think Inc. (Broadcom, Inc.)
• Original Assignee: Computer Associates Think Inc. (Broadcom, Inc.)
• Inventors: Fauque, Scott A.
• Granted Patent: US 7,218,252 B2
• Time in Patent Office: Days
• US Class Current: 341/50
• CPC Class Codes: G06F 40/126 Character encoding

Abstract

A system and method for converting character sets are provided. In one embodiment, the method includes populating a conversion character array based on a character string and a conversion character string, with the character string represented in a first character set and the conversion character string comprising the character string represented in a second character set. A conversion status array is populated for the character string at least partially based on the conversion character array. A dataset is then selected and the dataset is represented in the first character set. The dataset is converted into the second character set based, at least in part, on the conversion character array and the conversion status array.

Claims

1. A method for converting between character sets, comprising:

populating a conversion character array based on a character string and a conversion character string, the character string represented in a first character set and the conversion character string comprises the character string represented in a second character set;

populating a conversion status array for the character string based on the conversion character array;

selecting a dataset, the dataset represented in the first character set; and

converting the dataset into the second character set based, at least in part, on the conversion character array and the conversion status array.

2. The method of claim 1, the character string comprising a 256-byte character string.

3. The method of claim 1, the first character set comprising Single Byte Character Set (SBCS) and the second character set comprising a Multi-Byte Character Set (MBCS).

4. The method of claim 1, the first character set comprising a Unicode encoding form and the second character set comprising SBCS.

5. The method of claim 1, wherein:

the character string comprises a first character value and a second character value;

the dataset comprises a first character and a second character;

the conversion character array comprises a first data map and a second data map, the first data map maps the first character value in the first character set to the first character value in the second character set and the second data map maps the second character value in the first character set to the second character value in the second character set; and

the conversion status array comprises a first entry and a second entry and the first entry is associated with the first character value and the second entry is associated with the second character value.

6. The method of claim 5, wherein converting the dataset into the second character set based, at least in part, on the conversion character array and the conversion status array comprises:

identifying the first entry in the conversion status array based on the first character; and

in response to the first entry comprising zero, identifying the second entry in the conversion status array based on the second character.

7. The method of claim 6, in response to the first entry not comprising zero, the method further comprising communicating the dataset to a native conversion service.

8. The method of claim 6, in response to the second entry comprising zero, the method further comprising:

converting the first character based on the first data map; and

converting the second character based on the second data map.

9. The method of claim 6, in response to the second entry not comprising zero, the method further comprising communicating the dataset to a native conversion service.

10. The method of claim 1, further comprising:

communicating the character string to a native character conversion service, the character string represented in a first character set;

populating the conversion character array based, at least in part, on the conversion character string generated by the native conversion service.

11. The method of claim 10, the native character conversion service comprising a character conversion service offered by an operating system.

12. The method of claim 10, the native character conversion service comprising a callable character conversion service by a programming language.

13. The method of claim 1, wherein the conversion character array is manually populated.

14. Software for converting between character sets, the software operable to:

populate a conversion character array based on a character string and a conversion character string, the character string represented in a first character set and the conversion character string comprises the character string represented in a second character set;

populate a conversion status array for the character string based on the conversion character array;

select a dataset, the dataset represented in the first character set; and

convert the dataset into the second character set based, at least in part, on the conversion character array and the conversion status array.

15. The software of claim 14, the character string comprising a 256-byte character string.

16. The software of claim 14, the first character set comprising Single Byte Character Set (SBCS) and the second character set comprising a Multi-Byte Character Set (MBCS).

17. The software of claim 14, the first character set comprising a Unicode encoding form and the second character set comprising SBCS.

18. The software of claim 14, wherein:

the character string comprises a first character value and a second character value;

the dataset comprises a first character and a second character;

the conversion character array comprises a first data map and a second data map, the first data map maps the first character value in the first character set to the first character value in the second character set and the second data map maps the second character value in the first character set to the second character value in the second character set; and

the conversion status array comprises a first entry and a second entry and the first entry is associated with the first character value and the second entry is associated with the second character value.

19. The software of claim 18, wherein the software operable to convert the dataset into the second character set based, at least in part, on the conversion character array and the conversion status array comprises software operable to:

identify the first entry in the conversion status array based on the first character; and

in response to the first entry comprising zero, identify the second entry in the conversion status array based on the second character.

20. The software of claim 19, in response to the first entry not comprising zero, the software further operable to communicate the dataset to a native conversion service.

21. The software of claim 19, in response to the second entry comprising zero, the software further operable to:

convert the first character based on the first data map; and

convert the second character based on the second data map.

22. The software of claim 19, in response to the second entry not comprising zero, the software further operable to communicate the dataset to a native conversion service.

23. The software of claim 14, further operable to:

communicate the character string to a native character conversion service, the character string represented in a first character set;

populate the conversion character array based, at least in part, on the conversion character string received from the native conversion service.

24. The software of claim 23, the native character conversion service comprising a character conversion service offered by an operating system.

25. The software of claim 23, the native character conversion service comprising a callable character conversion service by a programming language.

26. The software of claim 14, wherein the conversion character array is manually populated.

36. The system of claim 24, the one or more processors further operable to:

communicate the character string to a native character conversion service, the character string represented in a first character set;

populate the conversion character array based, at least in part, on the conversion character string received from the native conversion service.

37. The system of claim 36, the native character conversion service comprising a character conversion service offered by an operating system.

38. The system of claim 36, the native character conversion service comprising a callable character conversion service by a programming language.

39. The system of claim 24, wherein the conversion character array is manually populated.

27. A system for converting between character sets, comprising:

memory operable to store a conversion character array and a conversion status array; and

one or more processors operable to;

populate the conversion character array based on a character string and a conversion character string, the character string represented in a first character set and the conversion character string comprises the character string represented in a second character set;

populate the conversion status array for the character string based on the conversion character array;

select a dataset, the dataset represented in the first character set; and

convert the dataset into the second character set based, at least in part, on the conversion character array and the conversion status array.

28. The system of claim 27, the character string comprising a 256-byte character string.

29. The system of claim 27, the first character set comprising Single Byte Character Set (SBCS) and the second character set comprising a Multi-Byte Character Set (MBCS).

30. The system of claim 27, the first character set comprising a Unicode encoding form and the second character set comprising SBCS.

31. The system of claim 27, wherein:

the character string comprises a first character value and a second character value;

the dataset comprises a first character and a second character;

the conversion character array comprises a first data map and a second data map, the first data map maps the first character value in the first character set to the first character value in the second character set and the second data map maps the second character value in the first character set to the second character value in the second character set; and

the conversion status array comprises a first entry and a second entry and the first entry is associated with the first character value and the second entry is associated with the second character value.

32. The system of claim 31, wherein the one or more processors operable to convert the dataset into the second character set based, at least in part, on the conversion character array and the conversion status array comprise the one or more processors operable to:

identify the first entry in the conversion status array based on the first character; and

in response to the first entry comprising zero, identify the second entry in the conversion status array based on the second character.

33. The system of claim 32, in response to the first entry not comprising zero, the one or more processors further operable to communicate the dataset to a native conversion service.

34. The system of claim 32, in response to the second entry comprising zero, the one or more processors further operable to:

convert the first character based on the first data map; and

convert the second character based on the second data map.

35. The system of claim 32, in response to the second entry not comprising zero, communicate the dataset to a native conversion service.