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10,7/unscsp/strlib/strcnv.mac
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TITLE CNVSTR
SEARCH STRDCL
IFE HIGH,<
TWOSEG
RELOC 400000>
;THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY ONLY BE USED
; OR COPIED IN ACCORDANCE WITH THE TERMS OF SUCH LICENSE.
;
;COPYRIGHT (C) 1974,1979 BY DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
; USAGE -- CNVSTR(ARG1, ARG2, BASE, MODE)
; MODE = (TO-ASC,FROM-ASC)*(ZERO-PAD,BL-PAD)*(NOFILL)
ENTRY CNVSTR,CNVST.
CNVSTR:
CNVST.:
C2=T1
BASE=CNT
SOURCE=BP2
DEST=BP2
REM=SOURCE+1
SAVALL
MOVE MODE,@3(AP)
MOVE BASE,@2(AP)
TRNN MODE,TO.ASCII ;SKIP SAYS TO
JRST ST.NUM
; ***************
NUM.ST:
STRARG 0,AP,BP1,LEN1
HRRZ R2,R1 ;GET R1 ALONE WILL NEED LATER
MOVM SOURCE,@1(AP) ;GET NUM TO CNV.
NS1:
IFE CHECK,<
SOJL LEN1,[ERROR LEM$##,CNV.FA
]>
IFN CHECK,<
SOJL LEN1,CNV.FA>
IDIV SOURCE,BASE ;REM=SOURCE+1
ADDI REM,60 ;CNV. RESIDUE TO BASE OF ASCII-NUMERIC(60-71)
PUSH P,REM
JUMPN SOURCE,NS1 ;KEEP GOING TIL SOURCE EXHAUSTED BY REP. DIV.
SUB R2,LEN1 ;R2 NOW CONTAINS NO. OF CHAR PUSHED
NS2: SKIPGE @1(AP) ;NEED MINUS SIGN--NO SKIP SAYS YES
JRST [MOVEI REM,"-"
IFE CHECK,<
SOJL LEN1,[ERROR LEM$##,CNV.FA
]>
IFN CHECK,<
SOJL LEN1,CNV.FA>
TRNN MODE,NOFILL ;IF NOFILL THE (-) WILL ALWAYS BE
;IMMED. LEFT OF HIGH ORD. DIGIT (I.E. SAME AS BLANK PAD)
TRNN MODE,Z.PAD ; SKIP SAYS ZERO PAD WHICH MEANS
;MINUS SIGN THEN 0'S AS
;OPPOSED TO BLKS AND THEN -.
JRST [PUSH P,REM ;MAKE IT SEEM AS IF (-) PUT OUT BY NS1 LP.
AOJA R2,NS3]
IDPB REM,BP1
JRST NS3]
NS3: TRNE MODE,NOFILL ;NO SKIP SAYS NO ZEROS OR BL.
JRST [FUNCT SETST.##,<$1,0(AP),R2,$2,[-1]>
JRST STK.STR]
JUMPE LEN1,STK.STR ;NO ROOM LEFT...EVERYONE'S NOFILL
MOVEI REM,40
TRNE MODE,Z.PAD ;NO SKIP SETS UP ZERO CHAR
MOVEI REM,60
NUM.FL: ;DO FILLING
IDPB REM,BP1
SOJG LEN1,NUM.FL
STK.STR: ;GET OFF STK
POP P,REM
IDPB REM,BP1
SOJG R2,STK.STR
JRST CNV.SU
; ************
ST.NUM:
STRARG 1,AP,BP1,LEN1
SETZ DEST,
SETZ T0, ;FOR MINUS SIGN CHK
SETO R0, ;PRESET SUCCESS
JUMPLE LEN1,ST.N2 ;CAN'T STRIP LEAD CHAR IF SOURCE-STR EXHAUSTED
ST.N0:
ILDB C1,BP1
CAIN C1,40 ;SKIP FOR BLANK
SOJG LEN1,ST.N0
CAIN C1,11 ;SKIP FOR TAB
SOJG LEN1,ST.N0
CAIE C1,"-" ;(-) OR DIGIT TERMS STRIPPING LOOP
JRST ST.N1A ;DON'T ILDB OVER THE DIGIT YOU'RE LOOKIN AT
SETO T0, ;TELLS TEST BEFORE ST.N2 TO NEGATE RESULT
SOJLE LEN1,ST.N2 ;GET INDEX PAST THE (-).
ST.N1:
IMUL DEST,BASE ;CREATE NUM AS I*BASE**N+J*BASE**N-1 ETC.
ILDB C1,BP1 ;GET NEW-LOW ORDER DIGIT
ST.N1A:
CAIL C1,60 ;IS CHAR LESS THAN ASCII 0?
CAIG BASE,-60(C1) ;GTR THAN "10-1" SO TO SPEAK?
SETZ R0, ;SET FAILURE
ADDI DEST,-60(C1) ;CNV. TO NUM AND ADD TO SUM
SOJG LEN1,ST.N1
SKIPGE T0
MOVNS DEST
ST.N2:
SKIPL R0 ;SUCCESS-ALWAYS RET VAL
TRNE MODE,ALWAYS ;SET USER VAR EVEN IF FAIL?
MOVEM DEST,@0(AP) ;RET VAL TO USR
RETURN
CNV.FA: SETZ R0,
JRST CNVEND
CNV.SU: SETO R0,
CNVEND: RETURN
PRGEND
TITLE MAPSTR
SEARCH STRDCL
IFE HIGH,<
TWOSEG
RELOC 400000>
; USAGE = MAPSTR(STR1,STR2,TRANSLATE,MODE, [LOWER.UPPER])
; MODE = (CNV67/CNV76)*(TRANSLATE)*(CONDIT. TRANSLATE-(YES.IN/NO))
ENTRY MAPSTR,MAPST.
MAPSTR:
MAPST.:
C2=R2
TRNVAL=CNT
LOWBND=T1
UPBND=T0
SAVALL
STRARG 1,AP,BP2,LEN2
STRARG 0,AP,BP1,LEN1,ML1
MOVE MODE,@3(AP)
MOVE TRNVAL,@2(AP) ;IF TRANSLATE SET
MOVEI C2,40 ;THE DEFAULT PAD CHAR
TRNE MODE,TLATE
JRST MAP.TRN
TLZ BP1,7700 ;ZERO BOTH SIZES
TLZ BP2,7700
TRNE MODE,TO.ASCII
JRST [MOVEI TRNVAL,40
TLO BP1,700 ;SET DEST SIZE TO 7
TLO BP2,600 ;SOURCE SIZE TO 6
JRST .+2]
JRST [MOVNI TRNVAL,40
TLO BP1,600
TLO BP2,700
SETZ C2, ;THE PAD CHAR IF NECESS.
JRST .+1]
; ********* BODY OF MAPSTR
MAP.TRN:
IFE BND.CH,<
CAMGE ML1,LEN2
IFN CHECK, <JRST MAP.FA>
IFE CHECK, <ERROR LEM$##,MAP.FA>
>
MOVE R2,LEN2 ;DON'T DESTROY LEN2
TRNE MODE,LB.UB
JRST MAP.CND
MAP.NOCND:
ILDB C1,BP2
ADD C1,TRNVAL ;TRANSLATE
IDPB C1,BP1
SOJG R2,MAP.NOCND
JRST MAP.IFPAD
MAP.CND:
SETZ R0,
TRNN MODE,YES.IN
SETO R0,
HRRZ UPBND,@4(AP)
HLRZ LOWBND,@4(AP)
MAP.C1: ILDB C1,BP2
; NEXT 5 INST. DETER. IF C1 BETWEEN LOWBND AND UPBND INCLUSIVE
SETZ R1,
CAMGE C1,LOWBND
SETO R1,
CAMLE C1,UPBND
SETO R1, ;HITTING EITHER SETO SAYS CHAR NOT BETWEEN LOW/UP
CAMN R1,R0 ;WILL DO ADD FOR R0 = YES.IN = -1 AND R1 = IN = -1
;AND FOR R0 = 0 AND R1 = 0
ADD C1,TRNVAL
IDPB C1,BP1
SOJG R2,MAP.C1
MAP.IFPAD:
SUB LEN1,LEN2 ;IS PADDING NECES?
JUMPG LEN1,MAP.PAD
JUMPE LEN1,MAP.SU
; WHEN NO PADDING, IT IS ASSUMED THAT PASSED LENGTH OF STRING1 IS NOT MEANINGFUL
FUNCT SETST.##,<$1,0(AP),LEN2,$2,[-1]>
JRST MAP.SU
MAP.PAD:
IDPB C2,BP1
SOJG LEN1,MAP.PAD
JRST MAP.SU
MAP.FA:
SETZ R0,
JRST MAPEND
MAP.SU:
SETO R0,
MAPEND:
RETURN
PRGEND
TITLE REVSTR
SEARCH STRDCL
IFE HIGH,<
TWOSEG
RELOC 400000>
; USAGE -- REVSTR(STRING1,STRING2 OR 0)
ENTRY REVSTR,REVST.
REVSTR:
REVST.:
C2=T1
SAVALL
; THE STRARG & LOCSUB SET UP 2 STR PTRS -- ONE AT
; THE BEGINNING OF THE STRING AND ONE AT THE END
STRARG 0,AP,BP1,LEN1,ML1
SKIPE @1(AP) ;NO SKIP SAYS 2 STRING ARGS
JRST REV2S
; **************
LOCSUB REL$L##,<[BP1],LEN1>
MOVE BP2,R0 ;PRESERVE R0 & R1 FOR RET VAL
HRRZ LEN2,R1
LSH LEN2,-1 ;DIVIDE BY TWO AND TRUNCATE
REV1: LDB C1,BP2 ;AT BEGINNING
LDB C2,BP1 ;AT END
IDPB C2,BP2 ;THE INVERSION
DECR DPB,C1,BP1
SOJG LEN2,REV1
REVEND:
POPALL
POPJ P,
; ******************
REV2S:
STRARG 1,AP,BP2,LEN2
MOVE R0,BP1 ;SETUP RETURN BP
LOCSUB REL$L##,<[BP1],LEN2>
IFE BND.CH,<
IFE CHECK,<
CAMGE ML1,LEN2
ERROR LEM$##,REV.FA>>
REV2: ILDB C1,BP2
DECR DPB,C1,BP1
SOJG LEN2,REV2
JRST REVEND
REV.FA:
SETZ R0,
SETZ R1,
JRST REVEND
END