Routines
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50094: Parser: Count Item References
Used by the routines at Parser_ValidateDirectObject, 50320, 50359 and Action_Shout.
Count how many tokens in the user input refer to game items.
Input
A The number of references to items in the user input tokens
F
Parser_CountItems 50094 LD HL,48486 Set a pointer to UserInput_Token_1 in HL.
50097 LD B,10 Set a token count in B of 10 which is the total length of the user input tokens.
50099 LD E,0 Initialise the item counter held in E to 0.
Parser_CountItems_Loop 50101 LD A,(HL) Fetch a user input token.
50102 CP 255 Jump to Parser_CountItems_Process if the terminator character (255) has been reached.
50104 JR Z,Parser_CountItems_Process
50106 PUSH HL Stash the token pointer and token counter on the stack.
50107 PUSH BC
50108 LD HL,(48414) HL=*Pointer_ObjectList.
50111 LD BC,(48426) BC=*Count_Objects.
50115 CPIR CPIR.
50117 POP BC Restore the token counter and token pointer from the stack.
50118 POP HL
50119 JR NZ,Parser_CountItems_Skip Jump to Parser_CountItems_Skip if this token doesn't refer to a game item.
This token does point to a game item, so increase the item counter.
50121 INC E Increment item counter by one.
Parser_CountItems_Skip 50122 INC HL Move to the next token.
50123 DJNZ Parser_CountItems_Loop Decrease the token counter by one and loop back to Parser_CountItems_Loop until all the tokens have been evaluated.
Parser_CountItems_Process 50125 XOR A Transfer the item count into A and set flags accordingly.
50126 OR E
50127 RET Return.
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