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/*
* This object loads libraries and libdirs from within a patch. It is the
* first small step towards a patch-specific namespace. Currently, it just
* adds things to the global path. It is a reimplementation of a similar/same
* idea from Guenter Geiger's [using] object. <hans@at.or.at>
*
* This object currently depends on the packages/patches/libdir-0.38-4.patch
* for sys_load_lib_dir().
*/
#include "m_pd.h"
#include "s_stuff.h"
#include "g_canvas.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/* WARNING: KLUDGE! */
/*
* this struct is not publically defined (its in g_canvas.c) so I need to
* include this here. Its from Pd 0.41-test03 2006-11-19. */
struct _canvasenvironment
{
t_symbol *ce_dir; /* directory patch lives in */
int ce_argc; /* number of "$" arguments */
t_atom *ce_argv; /* array of "$" arguments */
int ce_dollarzero; /* value of "$0" */
t_namelist *ce_path; /* search path */
};
static char *version = "$Revision: 1.2 $";
t_int import_instance_count;
t_namelist *loaded_libs = NULL;
#define DEBUG(x)
//#define DEBUG(x) x
/*------------------------------------------------------------------------------
* CLASS DEF
*/
t_class *import_class;
typedef struct _import
{
t_object x_obj;
t_canvas *x_canvas;
t_namelist *x_current;
char x_classpath_root[FILENAME_MAX];
t_outlet *x_data_outlet;
t_outlet *x_status_outlet;
} t_import;
static int load_library(t_import *x, char *library_name)
{
DEBUG(post("load_library"););
if (!sys_load_lib(x->x_canvas, library_name))
return 0;
else
return 1;
}
static void load_arguments(t_import *x, int argc, t_atom *argv)
{
t_symbol *library_name;
while (argc--) {
switch (argv->a_type) {
case A_FLOAT:
pd_error(x, "[import]: floats not supported: '%f'",
atom_getfloat(argv));
break;
case A_SYMBOL:
library_name = atom_getsymbol(argv);
if (!load_library(x,library_name->s_name))
pd_error(x, "[import]: can't load library in '%s'",
library_name->s_name);
else
{
loaded_libs = namelist_append(loaded_libs, library_name->s_name, 0);
if(sys_verbose)
post("[import] loaded library: '%s'", library_name->s_name);
}
break;
default:
pd_error(x, "[import]: Unsupported atom type");
}
argv++;
}
}
static void import_output(t_import* x)
{
DEBUG(post("import_output"););
char buffer[MAXPDSTRING];
/* TODO: think about using x->x_current->nl_next so that if [import] is at
* the end of its list, and another element gets added to the local
* namespace, [import] will output the new element on the next bang. */
if(x->x_current)
{
strncpy(buffer, x->x_current->nl_string, MAXPDSTRING);
outlet_symbol( x->x_data_outlet, gensym(buffer));
x->x_current = x->x_current->nl_next;
}
else
outlet_bang(x->x_status_outlet);
}
static void import_rewind(t_import* x)
{
x->x_current = loaded_libs;
}
static void *import_new(t_symbol *s, int argc, t_atom *argv)
{
t_import *x = (t_import *)pd_new(import_class);
t_symbol *currentdir;
x->x_data_outlet = outlet_new(&x->x_obj, &s_symbol);
x->x_status_outlet = outlet_new(&x->x_obj, 0);
x->x_canvas = canvas_getcurrent();
load_arguments(x,argc,argv);
import_rewind(x);
import_instance_count++;
return (x);
}
static void import_free(t_import *x)
{
import_instance_count--;
/* TODO perhaps loaded_libs should be an instance variable */
if(import_instance_count == 0)
{
if(loaded_libs)
{
namelist_free(loaded_libs);
loaded_libs = NULL;
}
}
/* TODO: perhaps this should remove any libs that this instance had added to
* the namespace */
}
void import_setup(void)
{
import_class = class_new(gensym("import"), (t_newmethod)import_new,
(t_method)import_free,
sizeof(t_import),
CLASS_DEFAULT,
A_GIMME,
0);
/* add inlet atom methods */
class_addbang(import_class,(t_method) import_output);
/* add inlet selector methods */
class_addmethod(import_class,(t_method) import_rewind,
gensym("rewind"), 0);
post("[import] %s",version);
post("\t[import] is still in development, the interface could change!");
//post("\tcompiled against Pd version %d.%d.%d", PD_MAJOR_VERSION,
// PD_MINOR_VERSION, PD_BUGFIX_VERSION);
post("\tcompiled against Pd-l2ork version %s", PD_TEST_VERSION);