Accessing the International Resources

With system software version 7.0, three improvements have been made to the

caching of handles for the 'itl2' and 'itl4' resources.

• System and application caches are separate. The application cache is

part of the context that is handled by the Process Manager. The

system cache is initialized during system startup with handles to the

'itl2' and 'itl4' resources in the System file. When an application is

launched, the application cache is initialized from the system cache.

• Although any application can call the SetScript function to change

the default ID for a particular script's 'itl2' or 'itl4' resource, this

alone no longer affects any cached handles. An application must call the

IUClearCache procedure in order for its cache to be reloaded. When

the cache is reloaded, the current default IDs for each script are used.

Consequently, applications that provide their own 'itl2' and 'itl4'

resources do not affect the use of these resources in other applications,

nor do they affect system behavior that depends on these resources.

• To provide increased efficiency in a multiscript environment, each

cache has an entry for the 'itl2' and 'itl4' handles for every installed

script.

New with system software version 7.0, the IUGetItlTable and

IUClearCache procedures allow you to obtain specific tables from the 'itl2'

and 'itl4' resources and make it easier for you to supply your own 'itl2' and

'itl4' resources. The supported table codes for the IUGetItlTable procedure

appear in International Utilities Package Data. The new routines

available with system software version 7.0 are identified by an asterisk (*).

IUGetIntl Given the type of international resource ('itl0', 'itl1',

'itl2', or 'itl4'), returns a handle to the correct

resource based on the current font script, the system

script, and the IntlForce flag

IUSetIntl Only sets fields in the obsolete 'INTL' 0 and 'INTL' 1

resources, which have been superseded by the 'itl0' and

'itl1' resources (It has been retained for backward

compatibility.)

IUClearCache* Clears the application cache containing the 'itl2' and

'itl4' handles, which is useful if applications want to

supply an 'itl2' or 'itl4' resource

IUGetItlTable* Given a script code and a table code, returns a handle to

the 'itl2' or 'itl4' resource that contains the table, the

offset of the specified table from the beginning of the

resource, and the length of the resource

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