Trailing-Edge
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PDP-10 Archives
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decuslib10-05
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43,50337/23/from.mac
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00100 COMMENT& SIMULA specification;
00200 OPTIONS(/EXTERN:QUICK,from);
00300
00400 TEXT PROCEDURE from(t,i); TEXT t; INTEGER i;
00500
00600 ! IF i<=t.Length THEN
00700 ! from :- IF i<=0 THEN t ELSE t.Sub(i,t.Length-1+1);
00800
00900 !&;! MACRO-10 code !;!
01000
01100 TITLE from
01200 SUBTTL Compute text reference to text after pos=i
01300 SALL
01400 SEARCH SIMMAC,SIMMCR
01500 MACINIT
01600 ENTRY from
01700 from: PROC
01800 HLLZ 1(XTAC) ;!Length,,0
01900 L X1,2(XTAC) ;! i
02000 IF ;! i>0
02100 SOJLE X1,FALSE
02200 THEN
02300 MOVSI X1,(X1)
02400 ADDM X1,(XTAC) ;!New offset,,address
02500 SUB X1 ;!New Length,,0
02600 SKIPG
02700 SETZB (XTAC) ;! NOTEXT
02800 FI
02900 L9():! ST 1(XTAC)
03000 RETURN
03100 EPROC
03200 END;