Guardian Programming Reference Summary for pTAL and TAL

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Guardian Programming Reference Summary for pTAL and TAL—522631-001
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Notation for Messages
!i and !o. In procedure calls, the !i notation follows an input parameter (one that passes data
to the called procedure); the !o notation follows an output parameter (one that returns
data to the calling program). For example:
CALL CHECKRESIZESEGMENT ( segment-id !i
, error ) ; !o
!i,o. In procedure calls, the !i,o notation follows an input/output parameter (one that both
passes data to the called procedure and returns data to the calling program). For
example:
error := COMPRESSEDIT ( filenum ) ; !i,o
!i:i. In procedure calls, the !i:i notation follows an input string parameter that has a
corresponding parameter specifying the length of the string in bytes. For example:
error := FILENAME_COMPARE_ ( filename1:length !i:i
, filename2:length ) ; !i:i
!o:i. In procedure calls, the !o:i notation follows an output buffer parameter that has a
corresponding input parameter specifying the maximum length of the output buffer in
bytes. For example:
error := FILE_GETINFO_ ( filenum !i
, [ filename:maxlen ] ) ; !o:i
Notation for Messages
The following list summarizes the notation conventions for the presentation of displayed
messages in this manual.
Bold Text. Bold text in an example indicates user input entered at the terminal. For example:
ENTER RUN CODE
?123
CODE RECEIVED: 123.00
The user must press the Return key after typing the input.
Nonitalic text. Nonitalic letters, numbers, and punctuation indicate text that is displayed or
returned exactly as shown. For example:
Backup Up.
lowercase italic letters. Lowercase italic letters indicate variable items whose values are
displayed or returned. For example:
p-register
process-name