var BUILTIN = "builtin", COMMENT = "comment", STRING = "string", ATOM = "atom", NUMBER = "number", KEYWORD = "keyword", MODTAG = "header", COBOLLINENUM = "def", PERIOD = "link";
function makeKeywords(str) {
  var obj = {}, words = str.split(" ");
  for (var i = 0; i < words.length; ++i)
    obj[words[i]] = true;
  return obj;
}
var atoms = makeKeywords("TRUE FALSE ZEROES ZEROS ZERO SPACES SPACE LOW-VALUE LOW-VALUES ");
var keywords = makeKeywords("ACCEPT ACCESS ACQUIRE ADD ADDRESS ADVANCING AFTER ALIAS ALL ALPHABET ALPHABETIC ALPHABETIC-LOWER ALPHABETIC-UPPER ALPHANUMERIC ALPHANUMERIC-EDITED ALSO ALTER ALTERNATE AND ANY ARE AREA AREAS ARITHMETIC ASCENDING ASSIGN AT ATTRIBUTE AUTHOR AUTO AUTO-SKIP AUTOMATIC B-AND B-EXOR B-LESS B-NOT B-OR BACKGROUND-COLOR BACKGROUND-COLOUR BEEP BEFORE BELL BINARY BIT BITS BLANK BLINK BLOCK BOOLEAN BOTTOM BY CALL CANCEL CD CF CH CHARACTER CHARACTERS CLASS CLOCK-UNITS CLOSE COBOL CODE CODE-SET COL COLLATING COLUMN COMMA COMMIT COMMITMENT COMMON COMMUNICATION COMP COMP-0 COMP-1 COMP-2 COMP-3 COMP-4 COMP-5 COMP-6 COMP-7 COMP-8 COMP-9 COMPUTATIONAL COMPUTATIONAL-0 COMPUTATIONAL-1 COMPUTATIONAL-2 COMPUTATIONAL-3 COMPUTATIONAL-4 COMPUTATIONAL-5 COMPUTATIONAL-6 COMPUTATIONAL-7 COMPUTATIONAL-8 COMPUTATIONAL-9 COMPUTE CONFIGURATION CONNECT CONSOLE CONTAINED CONTAINS CONTENT CONTINUE CONTROL CONTROL-AREA CONTROLS CONVERTING COPY CORR CORRESPONDING COUNT CRT CRT-UNDER CURRENCY CURRENT CURSOR DATA DATE DATE-COMPILED DATE-WRITTEN DAY DAY-OF-WEEK DB DB-ACCESS-CONTROL-KEY DB-DATA-NAME DB-EXCEPTION DB-FORMAT-NAME DB-RECORD-NAME DB-SET-NAME DB-STATUS DBCS DBCS-EDITED DE DEBUG-CONTENTS DEBUG-ITEM DEBUG-LINE DEBUG-NAME DEBUG-SUB-1 DEBUG-SUB-2 DEBUG-SUB-3 DEBUGGING DECIMAL-POINT DECLARATIVES DEFAULT DELETE DELIMITED DELIMITER DEPENDING DESCENDING DESCRIBED DESTINATION DETAIL DISABLE DISCONNECT DISPLAY DISPLAY-1 DISPLAY-2 DISPLAY-3 DISPLAY-4 DISPLAY-5 DISPLAY-6 DISPLAY-7 DISPLAY-8 DISPLAY-9 DIVIDE DIVISION DOWN DROP DUPLICATE DUPLICATES DYNAMIC EBCDIC EGI EJECT ELSE EMI EMPTY EMPTY-CHECK ENABLE END END. END-ACCEPT END-ACCEPT. END-ADD END-CALL END-COMPUTE END-DELETE END-DISPLAY END-DIVIDE END-EVALUATE END-IF END-INVOKE END-MULTIPLY END-OF-PAGE END-PERFORM END-READ END-RECEIVE END-RETURN END-REWRITE END-SEARCH END-START END-STRING END-SUBTRACT END-UNSTRING END-WRITE END-XML ENTER ENTRY ENVIRONMENT EOP EQUAL EQUALS ERASE ERROR ESI EVALUATE EVERY EXCEEDS EXCEPTION EXCLUSIVE EXIT EXTEND EXTERNAL EXTERNALLY-DESCRIBED-KEY FD FETCH FILE FILE-CONTROL FILE-STREAM FILES FILLER FINAL FIND FINISH FIRST FOOTING FOR FOREGROUND-COLOR FOREGROUND-COLOUR FORMAT FREE FROM FULL FUNCTION GENERATE GET GIVING GLOBAL GO GOBACK GREATER GROUP HEADING HIGH-VALUE HIGH-VALUES HIGHLIGHT I-O I-O-CONTROL ID IDENTIFICATION IF IN INDEX INDEX-1 INDEX-2 INDEX-3 INDEX-4 INDEX-5 INDEX-6 INDEX-7 INDEX-8 INDEX-9 INDEXED INDIC INDICATE INDICATOR INDICATORS INITIAL INITIALIZE INITIATE INPUT INPUT-OUTPUT INSPECT INSTALLATION INTO INVALID INVOKE IS JUST JUSTIFIED KANJI KEEP KEY LABEL LAST LD LEADING LEFT LEFT-JUSTIFY LENGTH LENGTH-CHECK LESS LIBRARY LIKE LIMIT LIMITS LINAGE LINAGE-COUNTER LINE LINE-COUNTER LINES LINKAGE LOCAL-STORAGE LOCALE LOCALLY LOCK MEMBER MEMORY MERGE MESSAGE METACLASS MODE MODIFIED MODIFY MODULES MOVE MULTIPLE MULTIPLY NATIONAL NATIVE NEGATIVE NEXT NO NO-ECHO NONE NOT NULL NULL-KEY-MAP NULL-MAP NULLS NUMBER NUMERIC NUMERIC-EDITED OBJECT OBJECT-COMPUTER OCCURS OF OFF OMITTED ON ONLY OPEN OPTIONAL OR ORDER ORGANIZATION OTHER OUTPUT OVERFLOW OWNER PACKED-DECIMAL PADDING PAGE PAGE-COUNTER PARSE PERFORM PF PH PIC PICTURE PLUS POINTER POSITION POSITIVE PREFIX PRESENT PRINTING PRIOR PROCEDURE PROCEDURE-POINTER PROCEDURES PROCEED PROCESS PROCESSING PROGRAM PROGRAM-ID PROMPT PROTECTED PURGE QUEUE QUOTE QUOTES RANDOM RD READ READY REALM RECEIVE RECONNECT RECORD RECORD-NAME RECORDS RECURSIVE REDEFINES REEL REFERENCE REFERENCE-MONITOR REFERENCES RELATION RELATIVE RELEASE REMAINDER REMOVAL RENAMES REPEATED REPLACE REPLACING REPORT REPORTING REPORTS REPOSITORY REQUIRED RERUN RESERVE RESET RETAINING RETRIEVAL RETURN RETURN-CODE RETURNING REVERSE-VIDEO REVERSED REWIND REWRITE RF RH RIGHT RIGHT-JUSTIFY ROLLBACK ROLLING ROUNDED RUN SAME SCREEN SD SEARCH SECTION SECURE SECURITY SEGMENT SEGMENT-LIMIT SELECT SEND SENTENCE SEPARATE SEQUENCE SEQUENTIAL SET SHARED SIGN SIZE SKIP1 SKIP2 SKIP3 SORT SORT-MERGE SORT-RETURN SOURCE SOURCE-COMPUTER SPACE-FILL SPECIAL-NAMES STANDARD STANDARD-1 STANDARD-2 START STARTING STATUS STOP STORE STRING SUB-QUEUE-1 SUB-QUEUE-2 SUB-QUEUE-3 SUB-SCHEMA SUBFILE SUBSTITUTE SUBTRACT SUM SUPPRESS SYMBOLIC SYNC SYNCHRONIZED SYSIN SYSOUT TABLE TALLYING TAPE TENANT TERMINAL TERMINATE TEST TEXT THAN THEN THROUGH THRU TIME TIMES TITLE TO TOP TRAILING TRAILING-SIGN TRANSACTION TYPE TYPEDEF UNDERLINE UNEQUAL UNIT UNSTRING UNTIL UP UPDATE UPON USAGE USAGE-MODE USE USING VALID VALIDATE VALUE VALUES VARYING VLR WAIT WHEN WHEN-COMPILED WITH WITHIN WORDS WORKING-STORAGE WRITE XML XML-CODE XML-EVENT XML-NTEXT XML-TEXT ZERO ZERO-FILL ");
var builtins = makeKeywords("- * ** / + < <= = > >= ");
var tests = {
  digit: /\d/,
  digit_or_colon: /[\d:]/,
  hex: /[0-9a-f]/i,
  sign: /[+-]/,
  exponent: /e/i,
  keyword_char: /[^\s\(\[\;\)\]]/,
  symbol: /[\w*+\-]/
};
function isNumber(ch, stream) {
  if (ch === "0" && stream.eat(/x/i)) {
    stream.eatWhile(tests.hex);
    return true;
  }
  if ((ch == "+" || ch == "-") && tests.digit.test(stream.peek())) {
    stream.eat(tests.sign);
    ch = stream.next();
  }
  if (tests.digit.test(ch)) {
    stream.eat(ch);
    stream.eatWhile(tests.digit);
    if (stream.peek() == ".") {
      stream.eat(".");
      stream.eatWhile(tests.digit);
    }
    if (stream.eat(tests.exponent)) {
      stream.eat(tests.sign);
      stream.eatWhile(tests.digit);
    }
    return true;
  }
  return false;
}
const cobol = {
  startState: function() {
    return {
      indentStack: null,
      indentation: 0,
      mode: false
    };
  },
  token: function(stream, state) {
    if (state.indentStack == null && stream.sol()) {
      state.indentation = 6;
    }
    if (stream.eatSpace()) {
      return null;
    }
    var returnType = null;
    switch (state.mode) {
      case "string":
        var next = false;
        while ((next = stream.next()) != null) {
          if ((next == '"' || next == "'") && !stream.match(/['"]/, false)) {
            state.mode = false;
            break;
          }
        }
        returnType = STRING;
        break;
      default:
        var ch = stream.next();
        var col = stream.column();
        if (col >= 0 && col <= 5) {
          returnType = COBOLLINENUM;
        } else if (col >= 72 && col <= 79) {
          stream.skipToEnd();
          returnType = MODTAG;
        } else if (ch == "*" && col == 6) {
          stream.skipToEnd();
          returnType = COMMENT;
        } else if (ch == '"' || ch == "'") {
          state.mode = "string";
          returnType = STRING;
        } else if (ch == "'" && !tests.digit_or_colon.test(stream.peek())) {
          returnType = ATOM;
        } else if (ch == ".") {
          returnType = PERIOD;
        } else if (isNumber(ch, stream)) {
          returnType = NUMBER;
        } else {
          if (stream.current().match(tests.symbol)) {
            while (col < 71) {
              if (stream.eat(tests.symbol) === void 0) {
                break;
              } else {
                col++;
              }
            }
          }
          if (keywords && keywords.propertyIsEnumerable(stream.current().toUpperCase())) {
            returnType = KEYWORD;
          } else if (builtins && builtins.propertyIsEnumerable(stream.current().toUpperCase())) {
            returnType = BUILTIN;
          } else if (atoms && atoms.propertyIsEnumerable(stream.current().toUpperCase())) {
            returnType = ATOM;
          } else
            returnType = null;
        }
    }
    return returnType;
  },
  indent: function(state) {
    if (state.indentStack == null)
      return state.indentation;
    return state.indentStack.indent;
  }
};
export { cobol };
