DEFINITION MODULE FileIO;
(* Self-hosted V3 FileIO over the runtime shim (SysShim). Provides
   the subset used by the Coco/R-generated scanner/parser/driver,
   plus the classic string helpers. Stage-2 counterpart of the
   host-supplied FileIO used to bootstrap. *)

FROM SYSTEM IMPORT ADDRESS;

TYPE
  File = ADDRESS;
  INT32 = INTEGER;

CONST
  EOF = CHR(0);
  EOL = CHR(10);
  ESC = CHR(27);
  CR  = CHR(13);
  LF  = CHR(10);
  BS  = CHR(8);
  DEL = CHR(127);
  BitSetSize = 16;
  Long0 = 0;
  Long1 = 1;
  Long2 = 2;
  PathSep = ":";
  DirSep  = "/";

VAR
  Okay: BOOLEAN;
  con, err: File;
  StdIn, StdOut: File;

PROCEDURE NextParameter (VAR s: ARRAY OF CHAR);
PROCEDURE Open (VAR f: File; fileName: ARRAY OF CHAR; newFile: BOOLEAN);
PROCEDURE Close (VAR f: File);
PROCEDURE ReadBytes (f: File; VAR buf: ARRAY OF CHAR; VAR len: CARDINAL);
PROCEDURE Write (f: File; ch: CHAR);
PROCEDURE WriteLn (f: File);
PROCEDURE WriteString (f: File; str: ARRAY OF CHAR);
PROCEDURE WriteInt (f: File; int: INTEGER; wid: CARDINAL);
PROCEDURE WriteCard (f: File; card, wid: CARDINAL);

PROCEDURE SLENGTH (stringVal: ARRAY OF CHAR): CARDINAL;
PROCEDURE Assign (source: ARRAY OF CHAR; VAR destination: ARRAY OF CHAR);
PROCEDURE Extract (source: ARRAY OF CHAR;
                   startIndex, numberToExtract: CARDINAL;
                   VAR destination: ARRAY OF CHAR);
PROCEDURE Concat (stringVal1, stringVal2: ARRAY OF CHAR;
                  VAR destination: ARRAY OF CHAR);
PROCEDURE Compare (stringVal1, stringVal2: ARRAY OF CHAR): INTEGER;

END FileIO.