mirror of
https://github.com/kanaka/mal.git
synced 2024-09-20 10:07:45 +03:00
82 lines
1.9 KiB
QBasic
82 lines
1.9 KiB
QBasic
REM PR_STR(AZ%) -> R$
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PR_STR:
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T%=Z%(AZ%,0)
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REM PRINT "AZ%: " + STR$(AZ%) + ", T%: " + STR$(T%)
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IF T%=15 THEN AZ%=Z%(AZ%,1): GOTO PR_STR
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IF T%=0 THEN R$="nil": RETURN
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IF (T%=1) AND (Z%(AZ%,1)=0) THEN R$="false": RETURN
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IF (T%=1) AND (Z%(AZ%,1)=1) THEN R$="true": RETURN
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IF T%=2 THEN PR_INTEGER
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IF T%=4 THEN PR_STRING
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IF T%=5 THEN PR_SYMBOL
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IF T%=6 THEN PR_SEQ
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IF T%=8 THEN PR_SEQ
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IF T%=10 THEN PR_SEQ
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IF T%=12 THEN PR_FUNCTION
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R$="#<unknown>"
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RETURN
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PR_INTEGER:
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T%=Z%(AZ%,1)
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R$=STR$(T%)
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IF T%<0 THEN RETURN
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REM Remove initial space
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R$=RIGHT$(R$, LEN(R$)-1)
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RETURN
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PR_STRING:
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R$=CHR$(34) + ZS$(Z%(AZ%,1)) + CHR$(34)
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RETURN
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PR_SYMBOL:
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R$=ZS$(Z%(AZ%,1))
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RETURN
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PR_SEQ:
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IF PT%=-1 THEN RR$=""
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IF T%=6 THEN RR$=RR$+"("
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IF T%=8 THEN RR$=RR$+"["
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IF T%=10 THEN RR$=RR$+"{"
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REM push where we are in the sequence
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PT%=PT%+1
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PS%(PT%)= AZ%
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PR_SEQ_LOOP:
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IF Z%(AZ%,1) = 0 THEN PR_SEQ_DONE
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AZ%=AZ%+1
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REM Push type we are rendering on the stack
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PT%=PT%+1
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PS%(PT%) = Z%(AZ%,0)
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GOSUB PR_STR
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REM check type and pop off stack
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T%=PS%(PT%)
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IF (T% >= 6) AND (T% <= 11) THEN RR$=RR$
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IF (T% < 6) OR (T% > 11) THEN RR$=RR$+R$
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PT%=PT%-1
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REM Go to next list element
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AZ%=Z%(PS%(PT%),1)
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PS%(PT%) = AZ%
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IF Z%(AZ%,1) <> 0 THEN RR$=RR$+" "
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GOTO PR_SEQ_LOOP
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PR_SEQ_DONE:
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T%=Z%(PS%(PT%),0)
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PT%=PT%-1
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IF T%=6 THEN RR$=RR$+")"
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IF T%=8 THEN RR$=RR$+"]"
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IF T%=10 THEN RR$=RR$+"}"
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IF PT%=-1 THEN R$=RR$
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RETURN
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PR_FUNCTION:
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T1%=Z%(AZ%,1)
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R$="#<function" + STR$(T1%) + ">"
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RETURN
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PR_MEMORY:
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PRINT "Value Memory (Z%):"
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FOR I=0 TO ZI%-1
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PRINT " " + STR$(I) + ": type: " + STR$(Z%(I,0)) + ", value: " + STR$(Z%(I,1))
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NEXT I
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PRINT "String Memory (ZS%):"
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FOR I=0 TO ZJ%-1
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PRINT " " + STR$(I) + ": '" + ZS$(I) + "'"
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NEXT I
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RETURN
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