Symbol-set identification

GDDM V3R2 Base Application Programming Reference

Symbol-set identification

GDDM V3R2 Base Application Programming Reference
SC33-0868-02

Displays and printers identify loaded symbol sets by a one-byte symbol-set identifier. Usually, symbol sets are held on auxiliary storage. When a set is loaded into the PS store, a symbol-set identifier specified as a parameter in the loading call is associated with the data. It is then used to identify the symbol set during processing of the application program.

Reference to the symbol-set identifier takes one of two forms:

A single character
This form must have a character code greater than X'40', and it is used when identifying the symbol set associated with individual characters, as in the ASCSS call. If this function or the related query function ASQSS is used, it is likely that the symbol-set identifier chosen will be an alphanumeric character.
A full-word integer
This form is used when specifying the symbol-set identifier to be associated with given data, an alphanumeric field, or a graphics character string.

The correspondence between the integer and the character specifications is:

Characters "0" and "1" correspond to the integers 0 and 1. These refer to "read-only" character sets.
Other characters correspond to their character codes. For example, "A" corresponds to 193.

Integer symbol-set identifiers in the range 224 through 239 are reserved for graphics use and cannot be assigned to loaded symbol sets.

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