Routines
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B6AC: Parser: Validate Any Direct Object
Parser: Validate Any Direct Object.
Output
A The number of valid direct objects in the user input tokens
F The carry flag is set when the command is malformed
F The zero flag is set when there are no valid direct objects present in the input tokens
The first token is the verb, so target the second token for the direct object.
ParserValidateAnyDirectObject B6AC LD A,($AF2F) Fetch the AF2F(second token from the user input) and store it in A.
B6AF CP $FF Jump forward to ValidateAnyDirectObject if the token is anything other than the terminator character (FF).
B6B1 JR NZ,ValidateAnyDirectObject
The token was the terminator character (FF), so the sentence is malformed.
E.g. They tried "TAKE" but didn't write anything after it.
B6B3 CALL Messaging_PleaseBeMoreSpecific_Newline Call Messaging_PleaseBeMoreSpecific_Newline to ask for a more specific command.
B6B6 SCF Set the carry flag to indicate this call was a failure.
B6B7 RET Return.
The user input tokens have a direct object, return how many are in the command buffer.
ValidateAnyDirectObject B6B8 CALL ParserCountItemReferences Call ParserCountItemReferences.
B6BB RET Return.
View the equivalent code in;
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