/********************************************************************** marshal.c - $Author$ $Date$ created at: Thu Apr 27 16:30:01 JST 1995 Copyright (C) 1993-2003 Yukihiro Matsumoto **********************************************************************/ #include "ruby.h" #include "rubyio.h" #include "st.h" #include "util.h" #include #define BITSPERSHORT (2*CHAR_BIT) #define SHORTMASK ((1<str; rb_str_buf_cat(buf, s, n); if (arg->dest && RSTRING(buf)->len >= BUFSIZ) { if (arg->taint) OBJ_TAINT(buf); rb_io_write(arg->dest, buf); rb_str_resize(buf, 0); } } static void w_byte(c, arg) char c; struct dump_arg *arg; { w_nbyte(&c, 1, arg); } static void w_bytes(s, n, arg) char *s; int n; struct dump_arg *arg; { w_long(n, arg); w_nbyte(s, n, arg); } static void w_short(x, arg) int x; struct dump_arg *arg; { w_byte((x >> 0) & 0xff, arg); w_byte((x >> 8) & 0xff, arg); } static void w_long(x, arg) long x; struct dump_arg *arg; { char buf[sizeof(long)+1]; int i, len = 0; #if SIZEOF_LONG > 4 if (!(RSHIFT(x, 31) == 0 || RSHIFT(x, 31) == -1)) { /* big long does not fit in 4 bytes */ rb_raise(rb_eTypeError, "long too big to dump"); } #endif if (x == 0) { w_byte(0, arg); return; } if (0 < x && x < 123) { w_byte(x + 5, arg); return; } if (-124 < x && x < 0) { w_byte((x - 5)&0xff, arg); return; } for (i=1;isymbol, id, &num)) { w_byte(TYPE_SYMLINK, arg); w_long(num, arg); } else { w_byte(TYPE_SYMBOL, arg); w_bytes(sym, strlen(sym), arg); st_add_direct(arg->symbol, id, arg->symbol->num_entries); } } static void w_unique(s, arg) char *s; struct dump_arg *arg; { if (s[0] == '#') { rb_raise(rb_eArgError, "can't dump anonymous class %s", s); } w_symbol(rb_intern(s), arg); } static void w_object _((VALUE,struct dump_arg*,int)); static int hash_each(key, value, arg) VALUE key, value; struct dump_call_arg *arg; { w_object(key, arg->arg, arg->limit); w_object(value, arg->arg, arg->limit); return ST_CONTINUE; } static int obj_each(id, value, arg) ID id; VALUE value; struct dump_call_arg *arg; { w_symbol(id, arg->arg); w_object(value, arg->arg, arg->limit); return ST_CONTINUE; } static void w_extended(klass, arg) VALUE klass; struct dump_arg *arg; { char *path; if (FL_TEST(klass, FL_SINGLETON)) { if (RCLASS(klass)->m_tbl->num_entries || (RCLASS(klass)->iv_tbl && RCLASS(klass)->iv_tbl->num_entries > 1)) { rb_raise(rb_eTypeError, "singleton can't be dumped"); } klass = RCLASS(klass)->super; } while (BUILTIN_TYPE(klass) == T_ICLASS) { path = rb_class2name(RBASIC(klass)->klass); w_byte(TYPE_EXTENDED, arg); w_unique(path, arg); klass = RCLASS(klass)->super; } } static void w_class(type, obj, arg) int type; VALUE obj; struct dump_arg *arg; { char *path; VALUE klass = CLASS_OF(obj); w_extended(klass, arg); w_byte(type, arg); path = rb_class2name(klass); w_unique(path, arg); } static void w_uclass(obj, base_klass, arg) VALUE obj, base_klass; struct dump_arg *arg; { VALUE klass = CLASS_OF(obj); w_extended(klass, arg); if (klass != base_klass) { w_byte(TYPE_UCLASS, arg); w_unique(rb_obj_classname(obj), arg); } } static void w_ivar(tbl, arg) st_table *tbl; struct dump_call_arg *arg; { if (tbl) { w_long(tbl->num_entries, arg->arg); st_foreach(tbl, obj_each, (st_data_t)arg); } else { w_long(0, arg->arg); } } static void w_object(obj, arg, limit) VALUE obj; struct dump_arg *arg; int limit; { struct dump_call_arg c_arg; st_table *ivtbl = 0; if (limit == 0) { rb_raise(rb_eArgError, "exceed depth limit"); } if (obj == Qnil) { w_byte(TYPE_NIL, arg); } else if (obj == Qtrue) { w_byte(TYPE_TRUE, arg); } else if (obj == Qfalse) { w_byte(TYPE_FALSE, arg); } else if (FIXNUM_P(obj)) { #if SIZEOF_LONG <= 4 w_byte(TYPE_FIXNUM, arg); w_long(FIX2INT(obj), arg); #else if (RSHIFT((long)obj, 31) == 0 || RSHIFT((long)obj, 31) == -1) { w_byte(TYPE_FIXNUM, arg); w_long(FIX2LONG(obj), arg); } else { w_object(rb_int2big(FIX2LONG(obj)), arg, limit); return; } #endif } else if (SYMBOL_P(obj)) { w_symbol(SYM2ID(obj), arg); return; } else { long num; limit--; c_arg.limit = limit; c_arg.arg = arg; if (st_lookup(arg->data, obj, &num)) { w_byte(TYPE_LINK, arg); w_long(num, arg); return; } if (OBJ_TAINTED(obj)) arg->taint = Qtrue; if (ivtbl = rb_generic_ivar_table(obj)) { w_byte(TYPE_IVAR, arg); } st_add_direct(arg->data, obj, arg->data->num_entries); if (rb_respond_to(obj, s_dump)) { VALUE v; w_class(TYPE_USERDEF, obj, arg); v = rb_funcall(obj, s_dump, 1, INT2NUM(limit)); if (TYPE(v) != T_STRING) { rb_raise(rb_eTypeError, "_dump() must return String"); } w_bytes(RSTRING(v)->ptr, RSTRING(v)->len, arg); if (ivtbl) w_ivar(ivtbl, &c_arg); return; } switch (BUILTIN_TYPE(obj)) { case T_CLASS: if (FL_TEST(obj, FL_SINGLETON)) { rb_raise(rb_eTypeError, "singleton class can't be dumped"); } w_byte(TYPE_CLASS, arg); { VALUE path = rb_class_path(obj); if (RSTRING(path)->ptr[0] == '#') { rb_raise(rb_eArgError, "can't dump anonymous class %s", RSTRING(path)->ptr); } w_bytes(RSTRING(path)->ptr, RSTRING(path)->len, arg); } break; case T_MODULE: w_byte(TYPE_MODULE, arg); { VALUE path = rb_class_path(obj); if (RSTRING(path)->ptr[0] == '#') { rb_raise(rb_eArgError, "can't dump anonymous module %s", RSTRING(path)->ptr); } w_bytes(RSTRING(path)->ptr, RSTRING(path)->len, arg); } break; case T_FLOAT: w_byte(TYPE_FLOAT, arg); w_float(RFLOAT(obj)->value, arg); break; case T_BIGNUM: w_byte(TYPE_BIGNUM, arg); { char sign = RBIGNUM(obj)->sign ? '+' : '-'; long len = RBIGNUM(obj)->len; BDIGIT *d = RBIGNUM(obj)->digits; w_byte(sign, arg); w_long(SHORTLEN(len), arg); /* w_short? */ while (len--) { #if SIZEOF_BDIGITS > SIZEOF_SHORT BDIGIT num = *d; int i; for (i=0; iptr, RSTRING(obj)->len, arg); break; case T_REGEXP: w_uclass(obj, rb_cRegexp, arg); w_byte(TYPE_REGEXP, arg); w_bytes(RREGEXP(obj)->str, RREGEXP(obj)->len, arg); w_byte(rb_reg_options(obj), arg); break; case T_ARRAY: w_uclass(obj, rb_cArray, arg); w_byte(TYPE_ARRAY, arg); { long len = RARRAY(obj)->len; VALUE *ptr = RARRAY(obj)->ptr; w_long(len, arg); while (len--) { w_object(*ptr, arg, limit); ptr++; } } break; case T_HASH: w_uclass(obj, rb_cHash, arg); if (NIL_P(RHASH(obj)->ifnone)) { w_byte(TYPE_HASH, arg); } else if (FL_TEST(obj, FL_USER2)) { /* FL_USER2 means HASH_PROC_DEFAULT (see hash.c) */ rb_raise(rb_eArgError, "cannot dump hash with default proc"); } else { w_byte(TYPE_HASH_DEF, arg); } w_long(RHASH(obj)->tbl->num_entries, arg); st_foreach(RHASH(obj)->tbl, hash_each, (st_data_t)&c_arg); if (!NIL_P(RHASH(obj)->ifnone)) { w_object(RHASH(obj)->ifnone, arg, limit); } break; case T_STRUCT: w_class(TYPE_STRUCT, obj, arg); { long len = RSTRUCT(obj)->len; VALUE mem; long i; w_long(len, arg); mem = rb_struct_iv_get(rb_obj_class(obj), "__member__"); if (mem == Qnil) { rb_raise(rb_eTypeError, "uninitialized struct"); } for (i=0; iptr[i]), arg); w_object(RSTRUCT(obj)->ptr[i], arg, limit); } } break; case T_OBJECT: w_class(TYPE_OBJECT, obj, arg); w_ivar(ROBJECT(obj)->iv_tbl, &c_arg); break; case T_DATA: { VALUE v; w_class(TYPE_DATA, obj, arg); if (!rb_respond_to(obj, s_dump_data)) { rb_raise(rb_eTypeError, "class %s needs to have instance method `_dump_data'", rb_obj_classname(obj)); } v = rb_funcall(obj, s_dump_data, 0); w_object(v, arg, limit); } break; default: rb_raise(rb_eTypeError, "can't dump %s", rb_obj_classname(obj)); break; } } if (ivtbl) { w_ivar(ivtbl, &c_arg); } } static VALUE dump(arg) struct dump_call_arg *arg; { w_object(arg->obj, arg->arg, arg->limit); if (arg->arg->dest) { rb_io_write(arg->arg->dest, arg->arg->str); rb_str_resize(arg->arg->str, 0); } return 0; } static VALUE dump_ensure(arg) struct dump_arg *arg; { st_free_table(arg->symbol); st_free_table(arg->data); if (arg->taint) { OBJ_TAINT(arg->str); } return 0; } static VALUE marshal_dump(argc, argv) int argc; VALUE* argv; { VALUE obj, port, a1, a2; int limit = -1; struct dump_arg arg; struct dump_call_arg c_arg; port = Qnil; rb_scan_args(argc, argv, "12", &obj, &a1, &a2); if (argc == 3) { if (!NIL_P(a2)) limit = NUM2INT(a2); if (NIL_P(a1)) goto type_error; port = a1; } else if (argc == 2) { if (FIXNUM_P(a1)) limit = FIX2INT(a1); else if (NIL_P(a1)) goto type_error; else port = a1; } arg.dest = 0; if (!NIL_P(port)) { if (!rb_respond_to(port, s_write)) { type_error: rb_raise(rb_eTypeError, "instance of IO needed"); } arg.str = rb_str_buf_new(0); arg.dest = port; if (rb_respond_to(port, s_binmode)) { rb_funcall2(port, s_binmode, 0, 0); } } else { port = rb_str_buf_new(0); arg.str = port; } arg.symbol = st_init_numtable(); arg.data = st_init_numtable(); arg.taint = Qfalse; c_arg.obj = obj; c_arg.arg = &arg; c_arg.limit = limit; w_byte(MARSHAL_MAJOR, &arg); w_byte(MARSHAL_MINOR, &arg); rb_ensure(dump, (VALUE)&c_arg, dump_ensure, (VALUE)&arg); return port; } struct load_arg { char *ptr, *end; st_table *symbol; VALUE data; VALUE proc; int taint; }; static VALUE r_object _((struct load_arg *arg)); static int r_byte(arg) struct load_arg *arg; { int c; if (!arg->end) { VALUE src = (VALUE)arg->ptr; VALUE v = rb_funcall2(src, s_getc, 0, 0); if (NIL_P(v)) rb_eof_error(); c = (unsigned char)FIX2INT(v); } else if (arg->ptr < arg->end) { c = *(unsigned char*)arg->ptr++; } else { rb_raise(rb_eArgError, "marshal data too short"); } return c; } static void long_toobig(size) int size; { rb_raise(rb_eTypeError, "long too big for this architecture (size %d, given %d)", sizeof(long), size); } #undef SIGN_EXTEND_CHAR #if __STDC__ # define SIGN_EXTEND_CHAR(c) ((signed char)(c)) #else /* not __STDC__ */ /* As in Harbison and Steele. */ # define SIGN_EXTEND_CHAR(c) ((((unsigned char)(c)) ^ 128) - 128) #endif static long r_long(arg) struct load_arg *arg; { register long x; int c = SIGN_EXTEND_CHAR(r_byte(arg)); long i; if (c == 0) return 0; if (c > 0) { if (4 < c && c < 128) { return c - 5; } if (c > sizeof(long)) long_toobig(c); x = 0; for (i=0;i sizeof(long)) long_toobig(c); x = -1; for (i=0;iend) { VALUE src = (VALUE)arg->ptr; VALUE n = LONG2NUM(len); str = rb_funcall2(src, s_read, 1, &n); if (NIL_P(str)) goto too_short; StringValue(str); if (RSTRING(str)->len != len) goto too_short; if (OBJ_TAINTED(str)) arg->taint = Qtrue; } else { if (arg->ptr + len > arg->end) { too_short: rb_raise(rb_eArgError, "marshal data too short"); } str = rb_str_new(arg->ptr, len); arg->ptr += len; } return str; } static ID r_symlink(arg) struct load_arg *arg; { ID id; long num = r_long(arg); if (st_lookup(arg->symbol, num, &id)) { return id; } rb_raise(rb_eTypeError, "bad symbol"); } static ID r_symreal(arg) struct load_arg *arg; { ID id; id = rb_intern(RSTRING(r_bytes(arg))->ptr); st_insert(arg->symbol, arg->symbol->num_entries, id); return id; } static ID r_symbol(arg) struct load_arg *arg; { if (r_byte(arg) == TYPE_SYMLINK) { return r_symlink(arg); } return r_symreal(arg); } static char* r_unique(arg) struct load_arg *arg; { return rb_id2name(r_symbol(arg)); } static VALUE r_string(arg) struct load_arg *arg; { return r_bytes(arg); } static VALUE r_regist(v, arg) VALUE v; struct load_arg *arg; { rb_hash_aset(arg->data, INT2FIX(RHASH(arg->data)->tbl->num_entries), v); if (arg->taint) OBJ_TAINT(v); return v; } static void r_ivar(obj, arg) VALUE obj; struct load_arg *arg; { long len; len = r_long(arg); if (len > 0) { while (len--) { ID id = r_symbol(arg); VALUE val = r_object(arg); rb_ivar_set(obj, id, val); } } } static VALUE path2class(path) char *path; { VALUE v = rb_path2class(path); if (TYPE(v) != T_CLASS) { rb_raise(rb_eTypeError, "%s does not refer class", path); } return v; } static VALUE path2module(path) char *path; { VALUE v = rb_path2class(path); if (TYPE(v) != T_MODULE) { rb_raise(rb_eTypeError, "%s does not refer module", path); } return v; } static VALUE r_object0(arg, proc) struct load_arg *arg; VALUE proc; { VALUE v = Qnil; int type = r_byte(arg); long id; switch (type) { case TYPE_LINK: id = r_long(arg); v = rb_hash_aref(arg->data, LONG2FIX(id)); if (NIL_P(v)) { rb_raise(rb_eArgError, "dump format error (unlinked)"); } return v; case TYPE_IVAR: v = r_object0(arg, 0); r_ivar(v, arg); break; case TYPE_EXTENDED: { VALUE m = path2module(r_unique(arg)); v = r_object0(arg, 0); rb_extend_object(v, m); } break; case TYPE_UCLASS: { VALUE c = path2class(r_unique(arg)); if (FL_TEST(c, FL_SINGLETON)) { rb_raise(rb_eTypeError, "singleton can't be loaded"); } v = r_object0(arg, 0); if (rb_special_const_p(v) || TYPE(v) == T_OBJECT || TYPE(v) == T_CLASS) { format_error: rb_raise(rb_eArgError, "dump format error (user class)"); } if (TYPE(v) == T_MODULE || !RTEST(rb_funcall(c, '<', 1, RBASIC(v)->klass))) { VALUE tmp = rb_obj_alloc(c); if (TYPE(v) != TYPE(tmp)) goto format_error; } RBASIC(v)->klass = c; } break; case TYPE_NIL: v = Qnil; break; case TYPE_TRUE: v = Qtrue; break; case TYPE_FALSE: v = Qfalse; break; case TYPE_FIXNUM: { long i = r_long(arg); v = LONG2FIX(i); } break; case TYPE_FLOAT: { double d, t = 0.0; VALUE str = r_bytes(arg); if (strcmp(RSTRING(str)->ptr, "nan") == 0) { d = t / t; } else if (strcmp(RSTRING(str)->ptr, "inf") == 0) { d = 1.0 / t; } else if (strcmp(RSTRING(str)->ptr, "-inf") == 0) { d = -1.0 / t; } else { d = strtod(RSTRING(str)->ptr, 0); } v = rb_float_new(d); r_regist(v, arg); } break; case TYPE_BIGNUM: { long len; BDIGIT *digits; VALUE data; NEWOBJ(big, struct RBignum); OBJSETUP(big, rb_cBignum, T_BIGNUM); big->sign = (r_byte(arg) == '+'); len = r_long(arg); data = r_bytes0(len * 2, arg); #if SIZEOF_BDIGITS == SIZEOF_SHORT big->len = len; #else big->len = (len + 1) * 2 / sizeof(BDIGIT); #endif big->digits = digits = ALLOC_N(BDIGIT, big->len); MEMCPY(digits, RSTRING(data)->ptr, char, len * 2); #if SIZEOF_BDIGITS > SIZEOF_SHORT MEMZERO((char *)digits + len * 2, char, big->len * sizeof(BDIGIT) - len * 2); #endif len = big->len; while (len > 0) { unsigned char *p = (unsigned char *)digits; BDIGIT num = 0; #if SIZEOF_BDIGITS > SIZEOF_SHORT int shift = 0; int i; for (i=0; iptr, RSTRING(str)->len, options), arg); } break; case TYPE_ARRAY: { volatile long len = r_long(arg); /* gcc 2.7.2.3 -O2 bug?? */ v = rb_ary_new2(len); r_regist(v, arg); while (len--) { rb_ary_push(v, r_object(arg)); } } break; case TYPE_HASH: case TYPE_HASH_DEF: { long len = r_long(arg); v = rb_hash_new(); r_regist(v, arg); while (len--) { VALUE key = r_object(arg); VALUE value = r_object(arg); rb_hash_aset(v, key, value); } if (type == TYPE_HASH_DEF) { RHASH(v)->ifnone = r_object(arg); } } break; case TYPE_STRUCT: { VALUE klass, mem, values; volatile long i; /* gcc 2.7.2.3 -O2 bug?? */ long len; ID slot; klass = path2class(r_unique(arg)); mem = rb_struct_iv_get(klass, "__member__"); if (mem == Qnil) { rb_raise(rb_eTypeError, "uninitialized struct"); } len = r_long(arg); values = rb_ary_new2(len); for (i=0; iptr[i] != ID2SYM(slot)) { rb_raise(rb_eTypeError, "struct %s not compatible (:%s for :%s)", rb_class2name(klass), rb_id2name(slot), rb_id2name(SYM2ID(RARRAY(mem)->ptr[i]))); } rb_struct_aset(v, LONG2FIX(i), r_object(arg)); } } break; case TYPE_USERDEF: { VALUE klass = path2class(r_unique(arg)); if (!rb_respond_to(klass, s_load)) { rb_raise(rb_eTypeError, "class %s needs to have method `_load'", rb_class2name(klass)); } v = rb_funcall(klass, s_load, 1, r_string(arg)); r_regist(v, arg); } break; case TYPE_OBJECT: { VALUE klass = path2class(r_unique(arg)); v = rb_obj_alloc(klass); if (TYPE(v) != T_OBJECT) { rb_raise(rb_eArgError, "dump format error"); } r_regist(v, arg); r_ivar(v, arg); } break; case TYPE_DATA: { VALUE klass = path2class(r_unique(arg)); if (rb_respond_to(klass, s_alloc)) { static int warn = Qtrue; if (warn) { rb_warn("define `allocate' instead of `_alloc'"); warn = Qfalse; } v = rb_funcall(klass, s_alloc, 0); } else { v = rb_obj_alloc(klass); } if (TYPE(v) != T_DATA) { rb_raise(rb_eArgError, "dump format error"); } r_regist(v, arg); if (!rb_respond_to(v, s_load_data)) { rb_raise(rb_eTypeError, "class %s needs to have instance method `_load_data'", rb_class2name(klass)); } rb_funcall(v, s_load_data, 1, r_object0(arg, 0)); } break; case TYPE_MODULE_OLD: { VALUE str = r_bytes(arg); v = path2module(RSTRING(str)->ptr); r_regist(v, arg); } break; case TYPE_CLASS: { VALUE str = r_bytes(arg); v = path2class(RSTRING(str)->ptr); r_regist(v, arg); } break; case TYPE_MODULE: { VALUE str = r_bytes(arg); v = path2module(RSTRING(str)->ptr); r_regist(v, arg); } break; case TYPE_SYMBOL: v = ID2SYM(r_symreal(arg)); break; case TYPE_SYMLINK: return ID2SYM(r_symlink(arg)); default: rb_raise(rb_eArgError, "dump format error(0x%x)", type); break; } if (proc) { rb_funcall(proc, rb_intern("yield"), 1, v); } return v; } static VALUE r_object(arg) struct load_arg *arg; { return r_object0(arg, arg->proc); } static VALUE load(arg) struct load_arg *arg; { return r_object(arg); } static VALUE load_ensure(arg) struct load_arg *arg; { st_free_table(arg->symbol); return 0; } static VALUE marshal_load(argc, argv) int argc; VALUE *argv; { VALUE port, proc; int major, minor; VALUE v; struct load_arg arg; volatile VALUE hash; /* protect from GC */ rb_scan_args(argc, argv, "11", &port, &proc); if (rb_respond_to(port, rb_intern("to_str"))) { arg.taint = OBJ_TAINTED(port); /* original taintedness */ StringValue(port); /* possible conversion */ arg.ptr = RSTRING(port)->ptr; arg.end = arg.ptr + RSTRING(port)->len; } else if (rb_respond_to(port, s_getc) && rb_respond_to(port, s_read)) { if (rb_respond_to(port, s_binmode)) { rb_funcall2(port, s_binmode, 0, 0); } arg.taint = Qfalse; arg.ptr = (char *)port; arg.end = 0; } else { rb_raise(rb_eTypeError, "instance of IO needed"); } major = r_byte(&arg); minor = r_byte(&arg); if (major != MARSHAL_MAJOR || minor > MARSHAL_MINOR) { rb_raise(rb_eTypeError, "incompatible marshal file format (can't be read)\n\ \tformat version %d.%d required; %d.%d given", MARSHAL_MAJOR, MARSHAL_MINOR, major, minor); } if (RTEST(ruby_verbose) && minor != MARSHAL_MINOR) { rb_warn("incompatible marshal file format (can be read)\n\ \tformat version %d.%d required; %d.%d given", MARSHAL_MAJOR, MARSHAL_MINOR, major, minor); } arg.symbol = st_init_numtable(); arg.data = hash = rb_hash_new(); if (NIL_P(proc)) arg.proc = 0; else arg.proc = proc; v = rb_ensure(load, (VALUE)&arg, load_ensure, (VALUE)&arg); return v; } void Init_marshal() { VALUE rb_mMarshal = rb_define_module("Marshal"); s_dump = rb_intern("_dump"); s_load = rb_intern("_load"); s_dump_data = rb_intern("_dump_data"); s_load_data = rb_intern("_load_data"); s_alloc = rb_intern("_alloc"); s_getc = rb_intern("getc"); s_read = rb_intern("read"); s_write = rb_intern("write"); s_binmode = rb_intern("binmode"); rb_define_module_function(rb_mMarshal, "dump", marshal_dump, -1); rb_define_module_function(rb_mMarshal, "load", marshal_load, -1); rb_define_module_function(rb_mMarshal, "restore", marshal_load, -1); rb_define_const(rb_mMarshal, "MAJOR_VERSION", INT2FIX(MARSHAL_MAJOR)); rb_define_const(rb_mMarshal, "MINOR_VERSION", INT2FIX(MARSHAL_MINOR)); } VALUE rb_marshal_dump(obj, port) VALUE obj, port; { int argc = 1; VALUE argv[2]; argv[0] = obj; argv[1] = port; if (!NIL_P(port)) argc = 2; return marshal_dump(argc, argv); } VALUE rb_marshal_load(port) VALUE port; { return marshal_load(1, &port); }