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ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmvax/getc.for
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178
ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmvax/getc.for
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C***********************************************************************
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C
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C GETC.FOR
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C
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C
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C D I S C L A I M E R N O T I C E
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C ------------------- -----------
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C
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C This document and/or portions of the material and data furnished
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C herewith, was developed under sponsorship of the U. S. Government.
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C Neither the U.S. nor the U.S.D.O.E., nor the Leland Stanford Junior
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C University, nor their employees, nor their respective contractors,
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C subcontractors, or their employees, makes any warranty, express or
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C implied, or assumes any liability or responsibility for accuracy,
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C completeness or usefulness of any information, apparatus, product
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C or process disclosed, or represents that its use will not infringe
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C privately-owned rights. Mention of any product, its manufacturer,
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C or suppliers shall not, nor is it intended to, imply approval, dis-
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C approval, or fitness for any particular use. The U. S. and the
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C University at all times retain the right to use and disseminate same
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C for any purpose whatsoever. Such distribution shall be made by the
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C National Energy Software Center at the Argonne National Laboratory
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C and only subject to the distributee furnishing satisfactory proof
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C that he has a valid license from the Intel Corporation in effect.
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C
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C
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C-----------------------------------------------------------------------
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C
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C This module of the PL/M-VAX compiler contains routines which
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C are called by the lexical analysis module (GETLEX) to obtain
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C the next (maybe non-blank) source character. The source char-
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C acter may come from the source input file, an INCLUDE file, or
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C a macro body. When a new source line is read, it is (possibly)
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C listed, and tested to see if it is a control line.
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C
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C-----------------------------------------------------------------------
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C R E V I S I O N H I S T O R Y
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C
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C 15OCT81 Alex Hunter 1. Added disclaimer notice. (V5.4)
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C 04FEB82 Alex Hunter 1. Delete reference to GET_CNTRL_FLD. (V6.6)
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C 2. Change name of LINE_SEQS common block.
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C
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C-----------------------------------------------------------------------
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SUBROUTINE GETC
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C
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C----- GET NEXT CHARACTER FROM INPUT STREAM.
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C
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INCLUDE 'PLMCOM.FOR/NOLIST'
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INTEGER*2 W_LINE_NUMBER(0:99)
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COMMON /XQ_LINE_SEQS/ W_LINE_NUMBER
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CHARACTER*1 CR
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DATA CR /'0D'X/
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PARAMETER FIFO_MAX=10
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CHARACTER*133 FIFO_LINE(FIFO_MAX)
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INTEGER*2 FIFO_LEN(FIFO_MAX),FIFO_LINE_NO(FIFO_MAX),
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# FIFO_IN(FIFO_MAX)
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CHARACTER*300 CARD1
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10 COL=COL+1
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20 CHAR = LITVAL(LITLEV)(COL:COL)
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IF (CHAR.EQ.EOL) THEN
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IF (LITLEV.EQ.1) THEN
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30 IF (TABS.NE.0) THEN
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READ(IN,1000,END=100) L,CARD1
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J=1
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CARD=' '
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DO 31 I=1,L
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IF (CARD1(I:I).EQ.TAB) THEN
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J=J+TABS-MOD(J-1,TABS)
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ELSEIF (J.LE.300) THEN
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CARD(J:J)=CARD1(I:I)
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J=J+1
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ENDIF
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31 CONTINUE
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L=J-1
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ELSE
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READ(IN,1000,END=100) L,CARD
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ENDIF
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1000 FORMAT(Q,A)
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LINES_READ=LINES_READ+1
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IF (W_LINE_NUMBER(IN).GE.0) THEN
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LIST_LINE_NO=W_LINE_NUMBER(IN)
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ELSE
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LIST_LINE_NO = -W_LINE_NUMBER(IN)
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W_LINE_NUMBER(IN) = W_LINE_NUMBER(IN)-1
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ENDIF
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IF (CARD(LEFTMARGIN:LEFTMARGIN).EQ.'$') THEN
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IF (.NOT.NON_CONTROL_LINE_READ) THEN
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FIFO_DEPTH=FIFO_DEPTH+1
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IF (FIFO_DEPTH.GT.FIFO_MAX)
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# CALL FATAL('TOO MANY CONTROL LINES BEFORE FIRST '
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# //'NON-CONTROL LINE')
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FIFO_LINE(FIFO_DEPTH)=CARD
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FIFO_LEN(FIFO_DEPTH)=L
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FIFO_LINE_NO(FIFO_DEPTH)=LIST_LINE_NO
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FIFO_IN(FIFO_DEPTH)=IN
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ELSE
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CALL LIST_SOURCE_LINE(CARD(:L))
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ENDIF
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CARD(L+1:L+1)=CR
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CALL DQ SWITCH BUFFER(%REF(CARD(LEFTMARGIN+1:)),STATUS)
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CALL CONTROL_LINE
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GO TO 30
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ENDIF
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IF (.NOT.NON_CONTROL_LINE_READ) THEN
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NON_CONTROL_LINE_READ=.TRUE.
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CALL OPEN_OUTPUT_FILES
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CALL INIT_SYMTAB
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LISTING_TO_TERMINAL=PRINT_FILE_STRING(0).GE.3.AND.
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# PRINT_FILE_STRING(1).EQ.'T'.AND.
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# PRINT_FILE_STRING(2).EQ.'T'.AND.
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# PRINT_FILE_STRING(3).EQ.':'
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CALL SUMMARY_HEAD
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LINE_NO_SAVE=LIST_LINE_NO
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IN_SAVE=IN
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SKIP_STATE_SAVE=SKIP_STATE
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SKIP_STATE=4
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DO 35 I=1,FIFO_DEPTH
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LIST_LINE_NO=FIFO_LINE_NO(I)
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IN=FIFO_IN(I)
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CALL LIST_SOURCE_LINE(FIFO_LINE(I)(:FIFO_LEN(I)))
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35 CONTINUE
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LIST_LINE_NO=LINE_NO_SAVE
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IN=IN_SAVE
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SKIP_STATE=SKIP_STATE_SAVE
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ENDIF
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CALL LIST_SOURCE_LINE(CARD(:L))
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GO TO (40,30,30,40), SKIP_STATE
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40 CONTINUE
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CARD(L+2:L+2) = EOL
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COL = LEFTMARGIN
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ELSE
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LITLEV = LITLEV-1
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COL = LITCOL(LITLEV)
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ENDIF
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GO TO 20
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ENDIF
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RETURN
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100 IF (IN.EQ.8) THEN
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CHAR=EOF
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ELSE
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CLOSE(UNIT=IN)
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IN=IN-1
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GO TO 30
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ENDIF
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RETURN
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END
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C-------------------------------------------------------
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SUBROUTINE GETNB
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C
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C------ GET NEXT NON-BLANK CHARACTER.
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C
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INCLUDE 'PLMCOM.FOR/NOLIST'
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INTEGER*4 I
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CHARACTER*1 CH
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10 DO 20 I=COL+1,999
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CH=LITVAL(LITLEV)(I:I)
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IF (CH.NE.' '.AND.CH.NE.TAB) GO TO 30
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20 CONTINUE
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STOP 'GETNB BUG'
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30 IF (CH.EQ.EOL) THEN
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COL=I-1
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CALL GETC
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IF (CHAR.EQ.' '.OR.CHAR.EQ.TAB) GO TO 10
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ELSE
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CHAR=CH
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COL=I
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ENDIF
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RETURN
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END
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