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-- Std.Textio package declaration. This file is part of GHDL.
-- This file was written from the clause 14.3 of the VHDL LRM.
-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT ANY
-- WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
-- for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
package textio is
-- type definitions for text i/o
-- a LINE is a pointer to a string value.
type line is access string;
-- A file of variable-length ASCII records.
-- Note: in order to work correctly, the TEXT file type must be declared in
-- the textio package of library std. Otherwise, a file of string has a
-- non-ASCII format.
type text is file of string;
type side is (right, left); -- For justifying ouput data within fields.
subtype width is natural; -- For specifying widths of output fields.
-- standard text files
file input: text is in "STD_INPUT"; --V87
file output: text is out "STD_OUTPUT"; --V87
file input : text open read_mode is "STD_INPUT"; --V93
file output : text open write_mode is "STD_OUTPUT"; --V93
-- input routines for standard types
procedure readline (variable f: in text; l: inout line); --V87
procedure readline (file f: text; l: inout line); --V93
-- For READ procedures:
-- In this implementation, any L is accepted (ie, there is no constraints
-- on direction, or left bound). Therefore, even variable of type LINE
-- not initialized by READLINE are accepted. Strictly speaking, this is
-- not required by LRM, nor prevented. However, other implementations may
-- fail at parsing such strings.
--
-- Also, in case of error (GOOD is false), this implementation do not
-- modify L (as specified by the LRM) nor VALUE.
--
-- For READ procedures without a GOOD argument, an assertion fails in case
-- of error.
--
-- In case of overflow (ie, if the number is out of the bounds of the type),
-- the procedure will fail with an execution error.
-- FIXME: this should not occur for a bad string.
procedure read (l: inout line; value: out bit; good: out boolean);
procedure read (l: inout line; value: out bit);
procedure read (l: inout line; value: out bit_vector; good: out boolean);
procedure read (l: inout line; value: out bit_vector);
procedure read (l: inout line; value: out boolean; good: out boolean);
procedure read (l: inout line; value: out boolean);
procedure read (l: inout line; value: out character; good: out boolean);
procedure read (l: inout line; value: out character);
procedure read (l: inout line; value: out integer; good: out boolean);
procedure read (l: inout line; value: out integer);
procedure read (l: inout line; value: out real; good: out boolean);
procedure read (l: inout line; value: out real);
procedure read (l: inout line; value: out string; good: out boolean);
procedure read (l: inout line; value: out string);
-- This implementation requires no space after the unit identifier,
-- ie "7.5 nsv" is parsed as 7.5 ns.
-- The unit identifier can be in lower case, upper case or mixed case.
procedure read (l: inout line; value: out time; good: out boolean);
procedure read (l: inout line; value: out time);
-- output routines for standard types
procedure writeline (variable f: out text; l: inout line); --V87
procedure writeline (file f: text; l: inout line); --V93
-- This implementation accept any value for all the types.
procedure write
(l: inout line; value: in bit;
justified: in side := right; field: in width := 0);
procedure write
(l: inout line; value: in bit_vector;
justified: in side := right; field: in width := 0);
procedure write
(l: inout line; value: in boolean;
justified: in side := right; field: in width := 0);
procedure write
(l: inout line; value: in character;
justified: in side := right; field: in width := 0);
procedure write
(l: inout line; value: in integer;
justified: in side := right; field: in width := 0);
procedure write
(L: inout line; value: in real;
justified: in side := right; field: in width := 0;
digits: in natural := 0);
procedure write
(l: inout line; value: in string;
justified: in side := right; field: in width := 0);
-- UNIT must be a unit name declared in std.standard. Of course, no rules
-- in the core VHDL language prevent you from using a value that is not a
-- unit (eg: 10 ns or even 5 fs).
-- An assertion error message is generated in this case, and question mark
-- (?) is written at the place of the unit name.
procedure write
(l: inout line; value : in time;
justified: in side := right; field: in width := 0; unit : in TIME := ns);
end textio;
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