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/*
* Copyright 1993-2002 Christopher Seiwald and Perforce Software, Inc.
*
* This file is part of Jam - see jam.c for Copyright information.
*/
/* This file is ALSO:
* Copyright 2001-2004 David Abrahams.
* Distributed under the Boost Software License, Version 1.0.
* (See accompanying file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
*/
#include "jam.h"
#include "lists.h"
#include "search.h"
#include "timestamp.h"
#include "pathsys.h"
#include "variable.h"
#include "newstr.h"
#include "compile.h"
#include "strings.h"
#include "hash.h"
#include "filesys.h"
#include <string.h>
typedef struct _binding
{
char * binding;
char * target;
} BINDING;
static struct hash *explicit_bindings = 0;
void call_bind_rule
(
char * target_,
char * boundname_
)
{
LIST * bind_rule = var_get( "BINDRULE" );
if ( bind_rule )
{
/* No guarantee that the target is an allocated string, so be on the
* safe side.
*/
char * target = copystr( target_ );
/* Likewise, do not rely on implementation details of newstr.c: allocate
* a copy of boundname.
*/
char * boundname = copystr( boundname_ );
if ( boundname && target )
{
/* Prepare the argument list. */
FRAME frame[1];
frame_init( frame );
/* First argument is the target name. */
lol_add( frame->args, list_new( L0, target ) );
lol_add( frame->args, list_new( L0, boundname ) );
if ( lol_get( frame->args, 1 ) )
evaluate_rule( bind_rule->string, frame );
/* Clean up */
frame_free( frame );
}
else
{
if ( boundname )
freestr( boundname );
if ( target )
freestr( target );
}
}
}
/*
* search.c - find a target along $(SEARCH) or $(LOCATE)
* First, check if LOCATE is set. If so, use it to determine
* the location of target and return, regardless of whether anything
* exists on that location.
*
* Second, examine all directories in SEARCH. If there's file already
* or there's another target with the same name which was placed
* to this location via LOCATE setting, stop and return the location.
* In case of previous target, return it's name via the third argument.
*
* This bevahiour allow to handle dependency on generated files. If
* caller does not expect that target is generated, 0 can be passed as
* the third argument.
*/
char *
search(
char *target,
time_t *time,
char **another_target,
int file
)
{
PATHNAME f[1];
LIST *varlist;
string buf[1];
int found = 0;
/* Will be set to 1 if target location is specified via LOCATE. */
int explicitly_located = 0;
char *boundname = 0;
if ( another_target )
*another_target = 0;
if (! explicit_bindings )
explicit_bindings = hashinit( sizeof(BINDING),
"explicitly specified locations");
string_new( buf );
/* Parse the filename */
path_parse( target, f );
f->f_grist.ptr = 0;
f->f_grist.len = 0;
if ( ( varlist = var_get( "LOCATE" ) ) )
{
f->f_root.ptr = varlist->string;
f->f_root.len = strlen( varlist->string );
path_build( f, buf, 1 );
if ( DEBUG_SEARCH )
printf( "locate %s: %s\n", target, buf->value );
explicitly_located = 1;
timestamp( buf->value, time );
found = 1;
}
else if ( ( varlist = var_get( "SEARCH" ) ) )
{
while ( varlist )
{
BINDING b, *ba = &b;
file_info_t *ff;
f->f_root.ptr = varlist->string;
f->f_root.len = strlen( varlist->string );
string_truncate( buf, 0 );
path_build( f, buf, 1 );
if ( DEBUG_SEARCH )
printf( "search %s: %s\n", target, buf->value );
ff = file_query(buf->value);
timestamp( buf->value, time );
b.binding = buf->value;
if ( hashcheck( explicit_bindings, (HASHDATA**)&ba ) )
{
if ( DEBUG_SEARCH )
printf(" search %s: found explicitly located target %s\n",
target, ba->target);
if ( another_target )
*another_target = ba->target;
found = 1;
break;
}
else if ( ff && ff->time )
{
if ( !file || ff->is_file )
{
found = 1;
break;
}
}
varlist = list_next( varlist );
}
}
if ( !found )
{
/* Look for the obvious */
/* This is a questionable move. Should we look in the */
/* obvious place if SEARCH is set? */
f->f_root.ptr = 0;
f->f_root.len = 0;
string_truncate( buf, 0 );
path_build( f, buf, 1 );
if ( DEBUG_SEARCH )
printf( "search %s: %s\n", target, buf->value );
timestamp( buf->value, time );
}
boundname = newstr( buf->value );
string_free( buf );
if ( explicitly_located )
{
BINDING b;
BINDING * ba = &b;
b.binding = boundname;
b.target = target;
/* CONSIDER: we probably should issue a warning is another file
is explicitly bound to the same location. This might break
compatibility, though. */
hashenter( explicit_bindings, (HASHDATA * *)&ba );
}
/* prepare a call to BINDRULE if the variable is set */
call_bind_rule( target, boundname );
return boundname;
}
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