Routines
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44944: Parser: Validate Input Tokens
Output
A The number of references to items in the user input tokens
F The zero flag is set when there is only a verb present
F The zero flag is unset when there is at least one valid direct object
F The carry flag is set when the command is malformed
The first token is the verb, so target the second token for the direct object.
Parser_ValidateInputTokens 44944 LD A,(43045) Fetch the second token from the user input and store it in A.
44947 CP 255 Return if there is no second token.
44949 RET Z
There is a second token; so validate all direct objects after this point.
44950 CALL Parser_CountItems Call Parser_CountItems.
44953 RET NZ Return if there is at least one valid item mentioned in the user input tokens.
Any references are invalid.
Print "Please rephrase that.".
44954 CALL Response_PleaseRephraseThat Call Response_PleaseRephraseThat.
44957 SCF Set the carry flag.
44958 RET Return.
View the equivalent code in The Jewels Of Babylon.
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