single-character Ada/Unix input - the Ada package (1 of 2)

single-character Ada/Unix input - the Ada package (1 of 2)

[Michael Feldman]

NOTE: This package is supplied with the source code for Ada-Tutor, which is
a shareware package distributed by the author listed below. I am sending
another file consisting of the C code for the body of ONECHAR.C
---------------------------------------------------------------------------
Prof. Michael Feldman
Department of Electrical Engineering and Computer Science
The George Washington University
Washington, DC 20052
202-994-5253
mfeldman@seas.gwu.edu
---------------------------------------------------------------------------

-- UNIX.ADA   Ver. 1.22   18-FEB-1989
-- Copyright 1988-1989 John J. Herro
-- Software Innovations Technology
-- 1083 Mandarin Drive NE, Palm Bay, FL 32905-4706   (407)951-0233
--
-- Compile this before compiling ADA_TUTR.ADA on a UNIX based system.  You must
-- also compile ONECHAR.C or ALTCHAR.C with a C compiler before linking.  See
-- first page of ADA_TUTR.ADA for more details.
--
with TEXT_IO;
package CUSTOM_IO is
   type COLOR is (BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE);
   FOREGRND_COLOR   : COLOR := WHITE;                 -- Default values in case
   BACKGRND_COLOR   : COLOR := BLACK;                 -- ADA-TUTR finds no User
   BORDER_COLOR     : COLOR := BLACK;                 -- File.
   FORE_COLOR_DIGIT : CHARACTER := CHARACTER'VAL(COLOR'POS(FOREGRND_COLOR)+48);
   BACK_COLOR_DIGIT : CHARACTER := CHARACTER'VAL(COLOR'POS(BACKGRND_COLOR)+48);
   NORMAL_COLORS    : STRING(1 .. 10) := ASCII.ESC & "[0;3" &
                              FORE_COLOR_DIGIT & ";4" & BACK_COLOR_DIGIT & "m";
   CLEAR_SCRN       : constant STRING := ASCII.ESC & "[H" & ASCII.ESC & "[2J";

   procedure SET_BORDER_COLOR (TO   : in COLOR);
   procedure GET              (CHAR : out CHARACTER);
   procedure PUT              (CHAR : in  CHARACTER) renames TEXT_IO.PUT;
   procedure PUT              (STR  : in  STRING)    renames TEXT_IO.PUT;
   procedure PUT_LINE         (STR  : in  STRING)    renames TEXT_IO.PUT_LINE;
   procedure GET_LINE         (STR  : out STRING;
                               LAST : out NATURAL)   renames TEXT_IO.GET_LINE;
   procedure NEW_LINE      (SPACING : in  TEXT_IO.COUNT := 1)
                                                     renames TEXT_IO.NEW_LINE;
end CUSTOM_IO;

package body CUSTOM_IO is
   procedure SET_BORDER_COLOR(TO : in COLOR) is
      -- Dummy procedure for computers other than PCs.
   begin
      null;
   end SET_BORDER_COLOR;

   procedure GET(CHAR : out CHARACTER) is
      function ONECHAR return CHARACTER;
      pragma INTERFACE (C, ONECHAR);
   begin
      CHAR := ONECHAR;
   end GET;
end CUSTOM_IO;