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OS_GSInit
Programmer's Reference Manuals
» Part 15 – SWI Calls
» OS
» OS_GSInit
OS_GSInit
(SWI &25)
| Entry | |
|---|---|
| R0 | String to translate |
| R2 | Flags |
| Exit | |
|---|---|
| R0 | Value for OS_GSRead |
| R1 | 1^st^ non-blank character |
| R2 | Value for OS_GSRead |
Use
The purpose of this call is to initialise registers for use by OS_GSRead.
Notes
OS_GSInit is one of the string routines which are used by the operating system
CLI to process text strings.
This SWI is followed by repeated calls to OS_Read.
One of the advantages of these routines is that they enable the use the character ‘|’ to introduce control characters which would otherwise be difficult to enter directly from the keyboard.
OS_GSInit also returns the first non-blank character in the string. However, this is not
necessarily the same as the output from the first OS_GSRead, since OS_GSInit doesn’t
perform any expansion.