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/* Copyright (c) 1997-1999 Miller Puckette.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#ifdef DL_OPEN
#include <dlfcn.h>
#endif
#ifdef UNISTD
#include <stdlib.h>
#include <unistd.h>
#endif
#ifdef MSW
#include <io.h>
#include <windows.h>
#endif
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif
#include <string.h>
#define PD_PLUSPLUS_FACE
#include "desire.h"
#include "s_stuff.h"
#include <stdio.h>
#include <sstream>
using namespace std;
typedef void (*t_xxx)();
/* naming convention for externs. The names are kept distinct for those
who wich to make "fat" externs compiled for many platforms. Less specific
fallbacks are provided, primarily for back-compatibility; these suffice if
you are building a package which will run with a single set of compiled
objects. The specific name is the letter b, l, d, or m for BSD, linux,
darwin, or microsoft, followed by a more specific string, either "fat" for
a fat binary or an indication of the instruction set. */
#ifdef __FreeBSD__
static char sys_dllextent[] = ".b_i386", sys_dllextent2[] = ".pd_freebsd";
#endif
#ifdef __linux__
#ifdef __ia64__
static char sys_dllextent[] = ".l_ia64", sys_dllextent2[] = ".pd_linux";
#else
static char sys_dllextent[] = ".l_i386", sys_dllextent2[] = ".pd_linux";
#endif
#endif
#ifdef __APPLE__
#ifndef MACOSX3
static char sys_dllextent[] = ".d_fat", sys_dllextent2[] = ".pd_darwin";
#else
static char sys_dllextent[] = ".d_ppc", sys_dllextent2[] = ".pd_darwin";
#endif
#endif
#ifdef MSW
static char sys_dllextent[] = ".m_i386", sys_dllextent2[] = ".dll";
#endif
/* maintain list of loaded modules to avoid repeating loads */
struct t_loadlist {
t_loadlist *ll_next;
t_symbol *ll_name;
};
static t_loadlist *sys_loaded;
/* return true if already loaded */
int sys_onloadlist(char *classname) {
t_symbol *s = gensym(classname);
t_loadlist *ll;
for (ll = sys_loaded; ll; ll = ll->ll_next)
if (ll->ll_name == s)
return 1;
return 0;
}
/* add to list of loaded modules */
void sys_putonloadlist(char *classname) {
t_loadlist *ll = (t_loadlist *)getbytes(sizeof(*ll));
ll->ll_name = gensym(classname);
ll->ll_next = sys_loaded;
sys_loaded = ll;
/* post("put on list %s", classname); */
}
static char *make_setup_name(const char *s) {
bool hexmunge=0;
ostringstream buf;
for (; *s; s++) {
char c = *s;
if ((c>='0' && c<='9') || (c>='A' && c<='Z') || (c>='a' && c<='z' )|| c == '_') {
buf << c;
} else if (c=='~' && s[1]==0) { /* trailing tilde becomes "_tilde" */
buf << "_tilde";
} else { /* anything you can't put in a C symbol is sprintf'ed in hex */
// load_object: symbol "setup_0xbf861ee4" not found
oprintf(buf,"0x%02x",c);
hexmunge = 1;
}
}
char *r;
if (hexmunge) asprintf(&r,"setup_%s",buf.str().data());
else asprintf(&r,"%s_setup",buf.str().data());
return r;
}
static int sys_do_load_lib(t_canvas *canvas, char *objectname) {
char *filename=0, *dirbuf, *classname, *nameptr;
t_xxx makeout = NULL;
int fd;
if ((classname = strrchr(objectname, '/'))) classname++;
else classname = objectname;
if (sys_onloadlist(objectname)) {
post("%s: already loaded", objectname);
return 1;
}
char *symname = make_setup_name(classname);
/* try looking in the path for (objectname).(sys_dllextent) ... */
if ((fd = canvas_open2(canvas, objectname, sys_dllextent , &dirbuf, &nameptr, 1)) >= 0) goto gotone;
/* same, with the more generic sys_dllextent2 */
if ((fd = canvas_open2(canvas, objectname, sys_dllextent2, &dirbuf, &nameptr, 1)) >= 0) goto gotone;
/* next try (objectname)/(classname).(sys_dllextent) ... */
asprintf(&filename,"%s/%s",objectname,classname);
if ((fd = canvas_open2(canvas, filename, sys_dllextent , &dirbuf, &nameptr, 1)) >= 0) goto gotone;
if ((fd = canvas_open2(canvas, filename, sys_dllextent2, &dirbuf, &nameptr, 1)) >= 0) goto gotone;
return 0;
gotone:
close(fd);
class_set_extern_dir(gensym(dirbuf));
/* rebuild the absolute pathname */
free(filename);
/* extra nulls are a workaround for a dlopen bug */
asprintf(&filename,"%s/%s%c%c%c%c",dirbuf,nameptr,0,0,0,0);
// filename = realloc(filename,);
#ifdef DL_OPEN
void *dlobj = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
if (!dlobj) {
post("%s: %s", filename, dlerror());
goto forgetit;
}
makeout = (t_xxx)dlsym(dlobj, symname);
#endif
#ifdef MSW
sys_bashfilename(filename, filename);
HINSTANCE ntdll = LoadLibrary(filename);
if (!ntdll) {
post("%s: couldn't load", filename);
goto forgetit;
}
makeout = (t_xxx)GetProcAddress(ntdll);
#endif
if (!makeout) {
post("%s: can't find symbol '%s' in library", filename, symname);
goto forgetit;
}
makeout();
class_set_extern_dir(&s_);
sys_putonloadlist(objectname);
free(filename); free(symname);
return 1;
forgetit:
class_set_extern_dir(&s_);
free(filename); free(symname); free(dirbuf);
return 0;
}
/* callback type definition */
typedef int (*t_loader)(t_canvas *canvas, char *classname);
/* linked list of loaders */
typedef struct t_loader_queue {
t_loader loader;
t_loader_queue *next;
};
static t_loader_queue loaders = {sys_do_load_lib, NULL};
/* register class loader function */
void sys_register_loader(t_loader loader) {
t_loader_queue *q = &loaders;
while (1) {
if (q->next) q = q->next;
else {
q->next = (t_loader_queue *)getbytes(sizeof(t_loader_queue));
q->next->loader = loader;
q->next->next = NULL;
break;
}
}
}
int sys_load_lib(t_canvas *canvas, char *classname) {
int dspstate = canvas_suspend_dsp();
int ok = 0;
for(t_loader_queue *q = &loaders; q; q = q->next) if ((ok = q->loader(canvas, classname))) break;
canvas_resume_dsp(dspstate);
return ok;
}
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