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dmake38a.arj
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PARSE.C
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1992-01-23
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/* RCS -- $Header: /u2/dvadura/src/generic/dmake/src/RCS/parse.c,v 1.1 1992/01/24 03:26:53 dvadura Exp $
-- SYNOPSIS -- parse the input, and perform semantic analysis
--
-- DESCRIPTION
-- This file contains the routines that parse the input makefile and
-- call the appropriate routines to perform the semantic analysis and
-- build the internal dag.
--
-- AUTHOR
-- Dennis Vadura, dvadura@watdragon.uwaterloo.ca
-- CS DEPT, University of Waterloo, Waterloo, Ont., Canada
--
-- COPYRIGHT
-- Copyright (c) 1990 by Dennis Vadura. All rights reserved.
--
-- This program is free software; you can redistribute it and/or
-- modify it under the terms of the GNU General Public License
-- (version 1), as published by the Free Software Foundation, and
-- found in the file 'LICENSE' included with this distribution.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warrant 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 this program; if not, write to the Free Software
-- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
--
-- LOG
-- $Log: parse.c,v $
* Revision 1.1 1992/01/24 03:26:53 dvadura
* dmake Version 3.8, Initial revision
*
*/
#include "extern.h"
PUBLIC void
Parse( fil )/*
============== Parse the makefile input */
FILE *fil;
{
int rule = FALSE; /* have seen a recipe line */
char *p; /* termporary pointer into Buffer */
DB_ENTER( "Parse" );
State = NORMAL_SCAN;
Group = FALSE; /* true if scanning a group rcpe */
while( TRUE ) {
if( Get_line( Buffer, fil ) ) {
if( fil != NIL( FILE ) ) /* end of parsable input */
Closefile();
Bind_rules_to_targets( F_DEFAULT );
if( Group ) Fatal( "Incomplete rule recipe group detected" );
DB_VOID_RETURN;
}
else {
switch( State ) {
case RULE_SCAN:
/* Check for the `[' that starts off a group rule definition. It
* must appear as the first non-white space
* character in the line. */
p = _strspn( Buffer, " \t\r\n" );
if( Set_group_attributes( p ) ) {
if( rule && Group )
Fatal( "Cannot mix single and group recipe lines" );
else
Group = TRUE;
rule = TRUE;
break; /* ignore the group start */
}
if( Group ) {
if( *p != ']' ) {
Add_recipe_to_list( Buffer, TRUE, TRUE );
rule = TRUE;
}
else
State = NORMAL_SCAN;
}
else {
if( *Buffer == '\t'
|| (Notabs && *Buffer == ' ') ) {
Add_recipe_to_list( Buffer, FALSE, FALSE );
rule = TRUE;
}
else if( *p == ']' )
Fatal( "Found unmatched ']'" );
else if( *Buffer && *p || (Notabs && !*Buffer && !*p))
State = NORMAL_SCAN;
}
if( State == RULE_SCAN ) break; /* ie. keep going */
Bind_rules_to_targets( (Group) ? F_GROUP: F_DEFAULT );
rule = FALSE;
if( Group ) {
Group = FALSE;
break;
}
/*FALLTRHOUGH*/
/* In this case we broke out of the rule scan because we do not
* have a recipe line that begins with a <TAB>, so lets
* try to scan the thing as a macro or rule definition. */
case NORMAL_SCAN:
if( !*Buffer ) continue; /* we have null input line */
/* STUPID AUGMAKE uses "include" at the start of a line as
* a signal to include a new file, so let's look for it.
* if we see it replace it by .INCLUDE: and stick this back
* into the buffer. */
if( !strncmp( "include", Buffer, 7 ) &&
(Buffer[7] == ' ' || Buffer[7] == '\t') )
{
char *tmp;
tmp = _strjoin( ".INCLUDE:", Buffer+7, -1, FALSE );
strcpy( Buffer, tmp );
FREE( tmp );
}
/* look for a macro definition, they all contain an = sign
* if we fail to recognize it as a legal macro op then try to
* parse the same line as a rule definition, it's one or the
* other */
if( Parse_macro(Buffer, M_DEFAULT) ) break;/* it's a macro def */
if( Parse_rule_def( &State ) ) break;/* it's a rule def */
/* if just blank line then ignore it */
if( *_strspn( Buffer, " \t\r\n" ) == '\0' ) break;
/* otherwise assume it was a line of unrecognized input, or a
* recipe line out of place so print a message */
Fatal( "Expecting macro or rule defn, found neither" );
break;
default:
Fatal( "Internal -- UNKNOWN Parser state %d", State );
}
}
}
}