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EnigmA Amiga Run 1995 October
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EnigmA AMIGA RUN 01 (1995)(G.R. Edizioni)(IT)[!][issue 1995-10][Aminet 7].iso
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lists.e
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1995-06-07
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418b
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18 lines
OPT MODULE
MODULE 'exec/nodes','exec/lists'
EXPORT PROC isfirst(node:PTR TO ln)
IF node.pred
IF node.pred.pred=0 THEN RETURN TRUE
ENDIF
ENDPROC FALSE
EXPORT PROC islast(node:PTR TO ln)
IF node.succ
IF node.succ.succ=0 THEN RETURN TRUE
ENDIF
ENDPROC FALSE
EXPORT PROC ishead(node:PTR TO ln) IS IF (node.pred=0) THEN TRUE ELSE FALSE
EXPORT PROC istail(node:PTR TO ln) IS IF (node.succ=0) THEN TRUE ELSE FALSE