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ASSEMBLY & COMPILE TOOLS/PLM VAX COMPILER/plmvax/gettok.for

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+C***********************************************************************
+C
+C                               GETTOK.FOR
+C
+C
+C		D I S C L A I M E R   N O T I C E		      
+C		-------------------   -----------
+C
+C  This document and/or portions of the material and data furnished
+C  herewith, was developed under sponsorship of the U. S. Government.
+C  Neither the U.S. nor the U.S.D.O.E., nor the Leland Stanford Junior
+C  University, nor their employees, nor their respective contractors,
+C  subcontractors, or their employees, makes any warranty, express or
+C  implied, or assumes any liability or responsibility for accuracy,
+C  completeness or usefulness of any information, apparatus, product
+C  or process disclosed, or represents that its use will not infringe
+C  privately-owned rights.  Mention of any product, its manufacturer,
+C  or suppliers shall not, nor is it intended to, imply approval, dis-
+C  approval, or fitness for any particular use.  The U. S. and the
+C  University at all times retain the right to use and disseminate same
+C  for any purpose whatsoever.  Such distribution shall be made by the
+C  National Energy Software Center at the Argonne National Laboratory
+C  and only subject to the distributee furnishing satisfactory proof
+C  that he has a valid license from the Intel Corporation in effect.
+C
+C
+C-----------------------------------------------------------------------
+C
+C    This module of the PL/M-VAX compiler contains the token analysis
+C    routine which is called to obtain the next token from the input
+C    stream.  The token analyzer looks ahead one lexical element to
+C    determine if the next token is a label, and if so stores the
+C    label in the current label list.  This list must be emptied
+C    before the next token is obtained, or an error will be diagnosed.
+C
+C-----------------------------------------------------------------------
+C		R E V I S I O N   H I S T O R Y
+C
+C    15OCT81  Alex Hunter  1. Added disclaimer notice. (V5.4)
+C    14JAN82  Alex Hunter  1. Treat <keyword>: as <identifier>:. (V6.5)
+C
+C-----------------------------------------------------------------------
+      SUBROUTINE GETTOK
+      INCLUDE 'PLMCOM.FOR/NOLIST'
+C
+      DO 5 I=1,NLABELS
+      CALL ERROR('MISPLACED LABEL -- '//LABELS(I))
+5     CONTINUE
+      NLABELS=0
+10    TOKENTYPE=NEXT_TOKENTYPE
+      DELIMITER=NEXT_DELIMITER
+      IDENTIFIER=NEXT_IDENTIFIER
+      STRING=NEXT_STRING
+      STRLEN=NEXT_STRLEN
+      FIXVAL=NEXT_FIXVAL
+      FLOATVAL=NEXT_FLOATVAL
+     
+      CALL GETLEX
+ 
+      IF (NEXT_TOKENTYPE.EQ.D_COLON .AND.
+     #    (TOKENTYPE.EQ.ID.OR.(TOKENTYPE.GE.101.AND.TOKENTYPE.LE.199)))
+     #THEN
+         IF (NLABELS.GE.MAX_LABELS) THEN
+            CALL ERROR('TOO MANY LABELS -- '//IDENTIFIER)
+         ELSE
+            NLABELS=NLABELS+1
+            LABELS(NLABELS) = IDENTIFIER
+         ENDIF
+         CALL GETLEX
+         GO TO 10
+      ENDIF
+      RETURN
+      END