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/*
* Copyright 1993, 2000 Christopher Seiwald.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/* This file is ALSO:
* (C) Copyright David Abrahams 2001. Permission to copy, use,
* modify, sell and distribute this software is granted provided this
* copyright notice appears in all copies. This software is provided
* "as is" without express or implied warranty, and with no claim as
* to its suitability for any purpose.
*/
# include "jam.h"
# include "lists.h"
# include "parse.h"
# include "compile.h"
# include "rules.h"
# include "variable.h"
# include "regexp.h"
# include "headers.h"
# include "hdrmacro.h"
# include "newstr.h"
/*
* headers.c - handle #includes in source files
*
* Using regular expressions provided as the variable $(HDRSCAN),
* headers() searches a file for #include files and phonies up a
* rule invocation:
*
* $(HDRRULE) <target> : <include files> ;
*
* External routines:
* headers() - scan a target for include files and call HDRRULE
*
* Internal routines:
* headers1() - using regexp, scan a file and build include LIST
*
* 04/13/94 (seiwald) - added shorthand L0 for null list pointer
* 09/10/00 (seiwald) - replaced call to compile_rule with evaluate_rule,
* so that headers() doesn't have to mock up a parse structure
* just to invoke a rule.
*/
static LIST *headers1( LIST *l, char *file, int rec, regexp *re[],
regexp* re_macros );
/*
* headers() - scan a target for include files and call HDRRULE
*/
# define MAXINC 10
void
headers( TARGET *t )
{
LIST *hdrscan;
LIST *hdrrule;
LIST *headlist = 0;
regexp *re[ MAXINC ];
int rec = 0;
/* the following regexp is used to detect cases where a */
/* file is included through a line line "#include MACRO" */
static regexp *re_macros = 0;
if ( re_macros == 0 )
{
re_macros = regex_compile(
"^[ ]*#[ ]*include[ ]*([A-Za-z][A-Za-z0-9_]*).*$" );
}
if( !( hdrscan = var_get( "HDRSCAN" ) ) ||
!( hdrrule = var_get( "HDRRULE" ) ) )
return;
if( DEBUG_HEADER )
printf( "header scan %s\n", t->name );
/* Compile all regular expressions in HDRSCAN */
while( rec < MAXINC && hdrscan )
{
re[rec++] = regex_compile( hdrscan->string );
hdrscan = list_next( hdrscan );
}
/* Doctor up call to HDRRULE rule */
/* Call headers1() to get LIST of included files. */
{
FRAME frame[1];
frame_init( frame );
lol_add( frame->args, list_new( L0, t->name ) );
lol_add( frame->args, headers1( headlist, t->boundname, rec, re, re_macros ) );
if( lol_get( frame->args, 1 ) )
evaluate_rule( hdrrule->string, frame );
/* Clean up */
frame_free( frame );
}
}
/*
* headers1() - using regexp, scan a file and build include LIST
*/
static LIST *
headers1(
LIST *l,
char *file,
int rec,
regexp *re[],
regexp *re_macros )
{
FILE *f;
char buf[ 1024 ];
int i;
if( !( f = fopen( file, "r" ) ) )
return l;
while( fgets( buf, sizeof( buf ), f ) )
{
for( i = 0; i < rec; i++ )
if( regexec( re[i], buf ) && re[i]->startp[1] )
{
re[i]->endp[1][0] = '\0';
if( DEBUG_HEADER )
printf( "header found: %s\n", re[i]->startp[1] );
l = list_new( l, newstr( re[i]->startp[1] ) );
}
/* special treatment for #include MACRO */
if ( regexec( re_macros, buf ) && re_macros->startp[1] )
{
char* header_filename;
re_macros->endp[1][0] = '\0';
if ( DEBUG_HEADER )
printf( "macro header found: %s", re_macros->startp[1] );
header_filename = macro_header_get( re_macros->startp[1] );
if (header_filename)
{
if ( DEBUG_HEADER )
printf( " resolved to '%s'\n", header_filename );
l = list_new( l, newstr( header_filename ) );
}
else
{
if ( DEBUG_HEADER )
printf( " ignored !!\n" );
}
}
}
fclose( f );
return l;
}
void
regerror( char *s )
{
printf( "re error %s\n", s );
}
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