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/* Copyright Vladimir Prus 2003. Distributed under the Boost */
/* Software License, Version 1.0. (See accompanying */
/* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) */
#include "class.h"
#include "strings.h"
#include "variable.h"
#include "frames.h"
#include "rules.h"
#include "newstr.h"
#include "hash.h"
static struct hash * classes = 0;
static void check_defined( LIST * class_names )
{
for ( ; class_names; class_names = class_names->next )
{
char * * p = &class_names->string;
if ( !hashcheck( classes, (HASHDATA * *)&p ) )
{
printf( "Class %s is not defined\n", class_names->string );
abort();
}
}
}
static char * class_module_name( char * declared_name )
{
string name[ 1 ];
char * result;
string_new( name );
string_append( name, "class@" );
string_append( name, declared_name );
result = newstr( name->value );
string_free( name );
return result;
}
struct import_base_data
{
char * base_name;
module_t * base_module;
module_t * class_module;
};
static void import_base_rule( void * r_, void * d_ )
{
RULE * r = (RULE *)r_;
RULE * ir1;
RULE * ir2;
struct import_base_data * d = (struct import_base_data *)d_;
string qualified_name[ 1 ];
string_new ( qualified_name );
string_append ( qualified_name, d->base_name );
string_push_back( qualified_name, '.' );
string_append ( qualified_name, r->name );
ir1 = import_rule( r, d->class_module, r->name );
ir2 = import_rule( r, d->class_module, qualified_name->value );
/* Copy 'exported' flag. */
ir1->exported = ir2->exported = r->exported;
/* If we are importing a class method, localize it. */
if ( ( r->module == d->base_module ) || ( r->module->class_module &&
( r->module->class_module == d->base_module ) ) )
ir1->module = ir2->module = d->class_module;
string_free( qualified_name );
}
/*
* For each exported rule 'n', declared in class module for base, imports that
* rule in 'class' as 'n' and as 'base.n'. Imported rules are localized and
* marked as exported.
*/
static void import_base_rules( module_t * class, char * base )
{
module_t * base_module = bindmodule( class_module_name( base ) );
struct import_base_data d;
d.base_name = base;
d.base_module = base_module;
d.class_module = class;
if ( base_module->rules )
hashenumerate( base_module->rules, import_base_rule, &d );
import_module( imported_modules( base_module ), class );
}
char * make_class_module( LIST * xname, LIST * bases, FRAME * frame )
{
char * name = class_module_name( xname->string );
char * * pp = &xname->string;
module_t * class_module = 0;
module_t * outer_module = frame->module;
if ( !classes )
classes = hashinit( sizeof( char * ), "classes" );
if ( hashcheck( classes, (HASHDATA * *)&pp ) )
{
printf( "Class %s already defined\n", xname->string );
abort();
}
else
{
hashenter( classes, (HASHDATA * *)&pp );
}
check_defined( bases );
class_module = bindmodule( name );
exit_module( outer_module );
enter_module( class_module );
var_set( "__name__", xname, VAR_SET );
var_set( "__bases__", bases, VAR_SET );
exit_module( class_module );
enter_module( outer_module );
for ( ; bases; bases = bases->next )
import_base_rules( class_module, bases->string );
return name;
}
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