UNICODE CHARACTER CONVERSION

• US 20140266818A1
• Filed: 06/11/2013
• Published: 09/18/2014
• Est. Priority Date: 03/12/2013
• Status: Active Grant

• Current Assignee: BMC Software Incorporated (KKR & Co., Inc.)
• Original Assignee: BMC Software Incorporated (KKR & Co., Inc.)
• Inventors: LAVIOLETTE, Michel
• Granted Patent: US 9,048,854 B2
• Time in Patent Office: Days
• US Class Current: 341/67
• CPC Class Codes: G06F 40/10 Text processing natural language analysis G06F40/20; semantic analysis G06F40/30; processing or translation of natural language G06F40/40
• CPC Class Codes: G06F 40/126 Character encoding
• CPC Class Codes: H03M 7/00 Conversion of a code where information is represented by a given sequence or number of digits to a code where the same , similar or subset of information is represented by a different sequence or number of digits
• CPC Class Codes: H03M 7/14 Conversion to or from non-weighted codes

Abstract

Disclosed is a method to convert a Unicode character. The method includes intercepting a service call for a character conversion, determining if a character associated with the service call is a candidate for a first conversion service, if the character is a candidate for the first conversion service, converting the character using the first conversion service, if the character is not a candidate for the first conversion service, converting the character using a second conversion service, and returning the converted character.

Claims

1. A method to convert a character, the method comprising:

intercepting a service call for a character conversion;

determining if a character associated with the service call is a candidate for a first conversion service;

if the character is a candidate for the first conversion service, converting the character using the first conversion service;

if the character is not a candidate for the first conversion service, converting the character using a second conversion service; and

returning the converted character.

2. The method of claim 1, wherein

the service call is to an address for the first conversion service, and

the service call is redirected to an address for the second conversion service if the character is not a candidate for the first conversion service.

3. The method of claim 1, wherein the service call includes the character, a character type associated with the character, and a character type to convert the character to.

4. The method of claim 1, wherein determining if the character is a candidate for a first conversion service includes:

determining a character length of the character, and

if the character length equals zero, the character is not a candidate for a first conversion service.

5. The method of claim 1, wherein determining if the character is a candidate for a first conversion service includes:

determining if the character is in a single byte character format;

determining if a character conversion type is a single byte character format; and

if both the character is in a single byte character format and the character conversion type is a single byte character format, the character is a candidate for a first conversion service.

6. The method of claim 1, wherein determining if the character is a candidate for a first conversion service includes:

reading a character type pair from the service call, the character type pair including a character type of the character and a character type of the converted character;

determining if the character type pair is in a look-up table of supported character type pairs; and

if the character type pair is in the look-up table, the character is a candidate for a first conversion service.

7. The method of claim 1, further comprising:

determining a location of a control block configured to anchor conversion service routines;

saving at least one address stored in the control block, the at least one address being associated with the conversion service routines, one of the at least one addresses including an address for a routine associated with the second conversion service; and

replacing the address for the routine associated with the second conversion service with an intercept address.

8. The method of claim 1, wherein

the first conversion service includes a first routine for converting characters;

the second conversion service includes a second routine for converting characters; and

the first routine, when executed by a processor, uses fewer processing resources than the second routine, when executed by the processor.

9. The method of claim 1, further comprising:

generating a first table and a second table based on plurality of single byte service calls to a four byte conversion routine, each of the service calls including a character set pair, the character set pair including a first character type and a second character type for a same character;

utilizing the first table to determine if a conversion is supported based on the character set pair;

adding a converted value for the character set pair to the second table if the conversion is supported;

the first conversion service includes a first routine for converting characters; and

the first routine uses the second table to determine a conversion value for the character.

10. The method of claim 9, wherein each of the converted character set pairs is assigned a handle.

11. A non-transitory computer readable medium including code segments that when executed by a processor cause the processor to:

intercept a service call for a character conversion;

determine if a character associated with the service call is a candidate for a first conversion service;

if the character is a candidate for the first conversion service, convert the character using the first conversion service;

if the character is not a candidate for the first conversion service, convert the character using a second conversion service; and

return the converted character.

12. The non-transitory computer readable medium of claim 11, wherein

the service call is to an intercept address, and

the service call is redirected to an address for the second conversion service if the character is not a candidate for the first conversion service.

13. The non-transitory computer readable medium of claim 11, wherein the service call includes the character, a character type associated with the character, and a character type to convert the character to.

14. The non-transitory computer readable medium of claim 11, wherein determining if the character is a candidate for a first conversion service includes:

determining a character length of the character, and

if the character length equals zero, the character is not a candidate for a first conversion service.

15. The non-transitory computer readable medium of claim 11, wherein determining if the character is a candidate for a first conversion service includes:

determining if the character is in a single byte character format;

determining if a character conversion type is a single byte character format; and

if both the character is in a single byte character format and the character conversion type is a single byte character format, the character is a candidate for a first conversion service.

16. The non-transitory computer readable medium of claim 11, wherein determining if the character is a candidate for a first conversion service includes:

reading a character type pair from the service call, the character type pair including a character type of the character and a character type of the converted character;

determining if the character type pair is in a look-up table of supported character type pairs; and

if the character type pair is in the look-up table, the character is a candidate for a first conversion service.

17. The non-transitory computer readable medium of claim 11, wherein the code segments further cause the processor to:

determine a location of a control block configured to anchor conversion service routines;

save at least one address stored in the control block, the at least one address being associated with the conversion service routines, one of the at least one addresses including an address for a routine associated with the second conversion service; and

replace the address for the routine associated with the second conversion service with an intercept address.

18. The non-transitory computer readable medium of claim 11, wherein

the first conversion service includes a first routine for converting characters;

the second conversion service includes a second routine for converting characters; and

the first routine, when executed by a processor, uses fewer processing resources than the second routine, when executed by the processor.

19. The non-transitory computer readable medium of claim 11, wherein the code segments further cause the processor to:

generate a first table and a second table based on plurality of single byte service calls to a four byte conversion routine, each of the service calls including a character set pair, the character set pair including a first character type and a second character type for a same character;

utilize the first table to determine if a conversion is supported based on the character set pair;

add a converted value for the character set pair to the second table if the conversion is supported;

the first conversion service includes a first routine for converting characters; and

the first routine uses the second table to determine a conversion value for the character.

20. A method to convert a character, the method comprising:

determining a location of a control block configured to anchor conversion service routines;

saving at least one address stored in the control block, the at least one address being associated with the conversion service routines, one of the at least one addresses including an address for a routine associated with the second conversion service;

replacing the address for the routine associated with the second conversion service with an intercept address;

intercepting a service call for a character conversion to the intercept address;

determining if a character associated with the service call is a candidate for a first conversion service;

if the character is a candidate for the first conversion service, converting the character using the first conversion service;

if the character is not a candidate for the first conversion service, converting the character using a second conversion service; and

returning the converted character.