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278 | -- $Header: /dc/uc/self/arcadia/ayacc/src/RCS/parse_template_file.a,v 1.1 1993/01/15 23:39:54 self Exp self $
-- Copyright (c) 1990 Regents of the University of California.
-- All rights reserved.
--
-- The primary authors of ayacc were David Taback and Deepak Tolani.
-- Enhancements were made by Ronald J. Schmalz.
--
-- Send requests for ayacc information to ayacc-info@ics.uci.edu
-- Send bug reports for ayacc to ayacc-bugs@ics.uci.edu
--
-- Redistribution and use in source and binary forms are permitted
-- provided that the above copyright notice and this paragraph are
-- duplicated in all such forms and that any documentation,
-- advertising materials, and other materials related to such
-- distribution and use acknowledge that the software was developed
-- by the University of California, Irvine. The name of the
-- University may not be used to endorse or promote products derived
-- from this software without specific prior written permission.
-- THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
-- IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
-- WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
-- Module : parse_template_file.ada
-- Component of : ayacc
-- Version : 1.2
-- Date : 11/21/86 12:33:32
-- SCCS File : disk21~/rschm/hasee/sccs/ayacc/sccs/sxparse_template_file.ada
--**
-- 6-Aug-2008 GdM: Added "at line ..." to Syntax Error
-- 2006 GdM: Added ref to YY_Sizes package (no more hardcoding of sizes)
--**
-- $Header: /dc/uc/self/arcadia/ayacc/src/RCS/parse_template_file.a,v 1.1 1993/01/15 23:39:54 self Exp self $
-- $Log: parse_template_file.a,v $
-- Revision 1.1 1993/01/15 23:39:54 self
-- Initial revision
--
--Revision 1.1 88/08/08 14:20:23 arcadia
--Initial revision
--
-- Revision 0.1 86/04/01 15:09:47 ada
-- This version fixes some minor bugs with empty grammars
-- and $$ expansion. It also uses vads5.1b enhancements
-- such as pragma inline.
--
--
-- Revision 0.0 86/02/19 18:40:09 ada
--
-- These files comprise the initial version of Ayacc
-- designed and implemented by David Taback and Deepak Tolani.
-- Ayacc has been compiled and tested under the Verdix Ada compiler
-- version 4.06 on a vax 11/750 running Unix 4.2BSD.
--
with Ada.Strings.Fixed;
with Ada.Directories;
with Options;
with Ayacc_File_Names;
package body Parse_Template_File is
use Ada.Text_IO;
-- SCCS_ID : constant String := "@(#) parse_template_file.ada, Version 1.2";
-- Rcs_ID : constant String := "$Header: /dc/uc/self/arcadia/ayacc/src/RCS/parse_template_file.a,v 1.1 1993/01/15 23:39:54 self Exp self $";
DECL_CODE_FILENAME : constant String := "code.miq";
INIT_CODE_FILENAME : constant String := "init.miq";
function Get_Filename (Code : in Code_Filename) return String is
begin
case Code is
when DECL_CODE =>
return DECL_CODE_FILENAME;
when INIT_CODE =>
return INIT_CODE_FILENAME;
end case;
end Get_Filename;
procedure Include_File (Outfile : in File_Type;
Filename : in String) is
Input : File_Type;
begin
if not Ada.Directories.Exists (Filename) then
return;
end if;
Open (Input, Ada.Text_IO.In_File, Filename);
while not End_Of_File (Input) loop
Put_Line (Outfile, Get_Line (Input));
end loop;
Close (Input);
end Include_File;
procedure Write_Indented (Outfile : in Ada.Text_IO.File_Type;
Line : in String) is
First : constant Positive_Count := Ada.Text_IO.Col (Outfile);
Start : constant Natural := Ada.Strings.Fixed.Index (Line, "(");
Pos : Natural := Line'First;
Sep : Natural;
begin
while Pos <= Line'Last loop
Sep := Ada.Strings.Fixed.Index (Line, ";", Pos);
if Sep > 0 then
Put_Line (Outfile, Line (Pos .. Sep));
Pos := Sep + 1;
Set_Col (Outfile, First + Positive_Count (Start - Line'First));
else
Put (Outfile, Line (Pos .. Line'Last));
return;
end if;
end loop;
end Write_Indented;
procedure Write_Line (Outfile : in File_Type;
Line : in String) is
Start : Natural := Line'First;
Pos : Natural;
begin
while Start <= Line'Last loop
Pos := Ada.Strings.Fixed.Index (Line, "${", Start);
if Pos = 0 then
Put_Line (Outfile, Line (Start .. Line'Last));
exit;
elsif Line (Pos .. Pos + 7) = "${YYLEX}" then
declare
Name : constant String := Ayacc_File_Names.Lex_Function_Name;
begin
Put (Outfile, Line (Start .. Pos - 1));
if Name'Length > 0 then
Put (Outfile, Name);
else
Put (Outfile, "YYLex");
end if;
Start := Pos + 8;
end;
elsif Line (Pos .. Pos + 9) = "${YYPARSE}" then
Put (Outfile, Line (Start .. Pos - 1));
Put (Outfile, Ayacc_File_Names.Get_Parse_Name);
Start := Pos + 10;
elsif Line (Pos .. Pos + 6) = "${NAME}" then
Put (Outfile, Line (Start .. Pos - 1));
Put (Outfile, Options.Ayacc_Stack_Size);
Start := Pos + 7;
elsif Line (Pos .. Pos + 14) = "${YYPARSEPARAM}" then
Put (Outfile, Line (Start .. Pos - 1));
Write_Indented (Outfile, Ayacc_File_Names.get_Parse_Params);
Start := Pos + 15;
elsif Line (Pos .. Pos + 13) = "${YYSTACKSIZE}" then
begin
Put (Outfile, Line (Start .. Pos - 1));
Put (Outfile, Options.Ayacc_Stack_Size);
Start := Pos + 14;
end;
else
Put_Line (Outfile, Line (Start .. Line'Last));
exit;
end if;
if Start > Line'Last then
New_Line (Outfile);
end if;
end loop;
end Write_Line;
procedure Template_Writer (Outfile : in File_Type) is
type Section_Type is (S_COMMON,
S_IF_DEBUG,
S_IF_ERROR,
S_IF_PRIVATE,
S_IF_REENTRANT,
S_IF_YYERROK,
S_IF_YYCLEARIN);
Current : Section_Type := S_COMMON;
Is_Visible : Boolean := True;
Invert : Boolean := False;
Continue : Boolean := True;
begin
while Continue and then Has_Line loop
declare
Line : constant String := Get_Line;
begin
if Line'Length = 0 then
if Is_Visible then
New_Line (Outfile);
end if;
elsif Line (Line'First) = '%' then
if Line = "%if debug" then
Current := S_IF_DEBUG;
elsif Line = "%if error" then
Current := S_IF_ERROR;
elsif Line = "%if private" then
Current := S_IF_PRIVATE;
elsif Line = "%if reentrant" then
Current := S_IF_REENTRANT;
elsif Line = "%if yyerrok" then
Current := S_IF_YYERROK;
elsif Line = "%if yyclearin" then
Current := S_IF_YYCLEARIN;
elsif Line = "%end" then
Current := S_COMMON;
Invert := False;
elsif Line = "%else" then
Invert := True;
elsif Line'Length > 3 and then Line (Line'First + 1) = '%' then
Continue := False;
return;
elsif Line = "%yydecl" then
if Is_Visible then
Include_File (Outfile, DECL_CODE_FILENAME);
end if;
elsif Line = "%yyinit" then
if Is_Visible then
Include_File (Outfile, INIT_CODE_FILENAME);
end if;
else
-- Very crude error report when the template % line is invalid.
-- This could happen only during development when templates
-- are modified.
raise Program_Error with "Invalid template '%' rule: " & Line;
end if;
Is_Visible := (Current = S_COMMON)
or else (Current = S_IF_DEBUG and then Options.Debug)
or else (Current = S_IF_PRIVATE and then Options.Package_Private)
or else (Current = S_IF_REENTRANT and then Options.Reentrant)
or else (Current = S_IF_YYERROK and then not Options.Skip_Yyerrok)
or else (Current = S_IF_YYCLEARIN and then not Options.Skip_Yyclearin)
or else (Current = S_IF_ERROR and then Options.Error_Recovery_Extension);
if Invert then
Is_Visible := not Is_Visible;
end if;
elsif Is_Visible then
Write_Line (Outfile, Line);
end if;
end;
end loop;
end Template_Writer;
procedure Write_Template (Outfile : in File_Type;
Lines : in Content_Array;
Position : in out Positive) is
function Has_Line return Boolean is
begin
return Position <= Lines'Last;
end Has_Line;
function Get_Line return String is
begin
Position := Position + 1;
return Lines (Position - 1).all;
end Get_Line;
procedure Write is new Template_Writer (Has_Line, Get_Line);
begin
Write (Outfile);
end Write_Template;
procedure Cleanup is
begin
if Ada.Directories.Exists (DECL_CODE_FILENAME) then
Ada.Directories.Delete_File (DECL_CODE_FILENAME);
end if;
if Ada.Directories.Exists (INIT_CODE_FILENAME) then
Ada.Directories.Delete_File (INIT_CODE_FILENAME);
end if;
end Cleanup;
end Parse_Template_File;
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