lref_t lstructurep(lref_t st, lref_t expected_layout)
{
if (!STRUCTUREP(st))
return boolcons(false);
if (!NULLP(expected_layout) && (expected_layout != STRUCTURE_LAYOUT(st)))
return boolcons(false);
return boolcons(true);
}
lref_t linput_portp(lref_t obj)
{
if (PORTP(obj) && PORT_INPUTP(obj))
return obj;
return boolcons(false);
}
lref_t loutput_portp(lref_t obj)
{
if (PORTP(obj) && PORT_OUTPUTP(obj))
return obj;
return boolcons(false);
}
lref_t lport_translate_mode(lref_t port)
{
if (!TEXT_PORTP(port))
vmerror_wrong_type_n(1, port);
return boolcons(PORT_TEXT_INFO(port)->translate);
}
lref_t lbinary_portp(lref_t obj)
{
if (BINARY_PORTP(obj))
return obj;
return boolcons(false);
}
lref_t lport_openp(lref_t obj)
{
if (!PORTP(obj))
vmerror_wrong_type_n(1, obj);
return boolcons(!PORT_CLOSEDP(obj));
}
lref_t leof_objectp(lref_t obj)
{
if (EOFP(obj))
return obj;
return boolcons(false);
}
lref_t lifoplog_enable(lref_t enablep)
{
lref_t prev = boolcons(CURRENT_TIB()->foplog_enable);
CURRENT_TIB()->foplog_enable = TRUEP(enablep);
return prev;
}
lref_t lset_interrupt_mask(lref_t new_mask)
{
bool previous_mask = interp.intr_masked;
interp.intr_masked = TRUEP(new_mask);
return boolcons(previous_mask);
}
lref_t lfresh_line(lref_t port)
{
if (NULLP(port))
port = CURRENT_OUTPUT_PORT();
if (!TEXT_PORTP(port))
vmerror_wrong_type_n(1, port);
if (PORT_INPUTP(port))
vmerror_unsupported(_T("cannot fresh-line to input ports"));
if ((PORT_TEXT_INFO(port)->col != 0) && !PORT_TEXT_INFO(port)->needs_lf) {
lnewline(port);
return boolcons(true);
}
return boolcons(false);
}
lref_t lrich_write(lref_t obj, lref_t machine_readable, lref_t port)
{
if (NULLP(port))
port = CURRENT_OUTPUT_PORT();
if (!PORTP(port))
vmerror_wrong_type_n(3, port);
if (PORT_INPUTP(port))
vmerror_unsupported(_T("cannot rich-write to input ports"));
if (PORT_CLASS(port)->rich_write == NULL)
return boolcons(false);
if (PORT_CLASS(port)->rich_write(port, obj, TRUEP(machine_readable)))
return port;
return boolcons(false);
}
lref_t lport_set_translate_mode(lref_t port, lref_t mode)
{
if (!TEXT_PORTP(port))
vmerror_wrong_type_n(1, port);
if (!BOOLP(mode))
vmerror_wrong_type_n(2, mode);
lflush_port(port);
bool old_translate_mode = PORT_TEXT_INFO(port)->translate;
PORT_TEXT_INFO(port)->translate = TRUEP(mode);
return boolcons(old_translate_mode);
}
static lref_t find_package(lref_t name)
{
_TCHAR *n = get_c_string(name);
for (lref_t l = interp.fasl_package_list; CONSP(l); l = CDR(l))
{
lref_t p = CAR(l);
if (!PACKAGEP(p))
panic("damaged package list");
if (_tcscmp(n, get_c_string(p->as.package.name)) == 0)
return p;
}
return boolcons(false);
}
lref_t lset_stack_limit(lref_t amount)
{
size_t new_size_limit = 0;
if (!NULLP(amount) && !FALSEP(amount))
new_size_limit = get_c_long(amount);
void *new_limit_obj = sys_set_stack_limit(new_size_limit);
if (!new_size_limit)
{
dscwritef(DF_SHOW_GC, ("stack limit disabled!"));
return boolcons(false);
}
dscwritef(DF_SHOW_GC, ("stack_size = ~cd bytes, [~c&,~c&]\n", new_size_limit, new_limit_obj, sys_get_stack_start()));
return fixcons(new_size_limit);
}
static void fast_read(lref_t reader, lref_t * retval, bool allow_loader_ops /* = false */ )
{
lref_t *fasl_table_entry = NULL;
*retval = NIL;
if (!FASL_READER_P(reader))
vmerror_wrong_type_n(1, reader);
assert(NULLP(FASL_READER_STREAM(reader)->table) || VECTORP(FASL_READER_STREAM(reader)->table));
/* The core of this function is wrapped in a giant while loop to remove
* tail recursive calls. Some opcodes don't directly return anything:
* they just tail recursively read the next opcode after performing their
* action via side effect. */
bool current_read_complete = false;
while (!current_read_complete)
{
/* Assume we're going to complete the read unless we find out otherwise.. */
current_read_complete = true;
size_t opcode_location = PORT_BYTES_READ(FASL_READER_PORT(reader));
enum fasl_opcode_t opcode = fast_read_opcode(reader);
fixnum_t index = 0;
lref_t name;
if (DEBUG_FLAG(DF_FASL_SHOW_OPCODES))
{
const _TCHAR *opcode_name = fasl_opcode_name(opcode);
dscwritef(DF_FASL_SHOW_OPCODES,
(_T("; DEBUG: fasl-opcode@~cx :~cS\n"),
opcode_location, opcode_name ? opcode_name : _T("<INVALID>")));
}
switch (opcode)
{
case FASL_OP_NIL:
*retval = NIL;
break;
case FASL_OP_TRUE:
*retval = boolcons(true);
break;
case FASL_OP_FALSE:
*retval = boolcons(false);
break;
case FASL_OP_CHARACTER:
fast_read_character(reader, retval);
break;
case FASL_OP_LIST:
fast_read_list(reader, false, retval);
break;
case FASL_OP_LISTD:
fast_read_list(reader, true, retval);
break;
case FASL_OP_FIX8:
fast_read_fixnum_int8(reader, retval);
break;
case FASL_OP_FIX16:
fast_read_fixnum_int16(reader, retval);
break;
case FASL_OP_FIX32:
fast_read_fixnum_int32(reader, retval);
break;
case FASL_OP_FIX64:
fast_read_fixnum_int64(reader, retval);
break;
case FASL_OP_FLOAT:
fast_read_flonum(reader, false, retval);
break;
case FASL_OP_COMPLEX:
fast_read_flonum(reader, true, retval);
break;
case FASL_OP_STRING:
fast_read_string(reader, retval);
break;
case FASL_OP_PACKAGE:
fast_read_package(reader, retval);
break;
case FASL_OP_VECTOR:
fast_read_vector(reader, retval);
break;
case FASL_OP_HASH:
fast_read_hash(reader, retval);
break;
case FASL_OP_CLOSURE:
fast_read_closure(reader, retval);
break;
case FASL_OP_MACRO:
fast_read_macro(reader, retval);
break;
case FASL_OP_SYMBOL:
fast_read_symbol(reader, retval);
break;
case FASL_OP_SUBR:
fast_read_subr(reader, retval);
break;
case FASL_OP_STRUCTURE:
fast_read_structure(reader, retval);
break;
case FASL_OP_STRUCTURE_LAYOUT:
fast_read_structure_layout(reader, retval);
break;
case FASL_OP_FAST_OP_0:
fast_read_fast_op(0, false, reader, retval);
break;
case FASL_OP_FAST_OP_1:
fast_read_fast_op(1, false, reader, retval);
break;
case FASL_OP_FAST_OP_2:
fast_read_fast_op(2, false, reader, retval);
break;
case FASL_OP_FAST_OP_0N:
fast_read_fast_op(0, true, reader, retval);
break;
case FASL_OP_FAST_OP_1N:
fast_read_fast_op(1, true, reader, retval);
break;
case FASL_OP_FAST_OP_2N:
fast_read_fast_op(2, true, reader, retval);
break;
case FASL_OP_NOP_1:
case FASL_OP_NOP_2:
case FASL_OP_NOP_3:
current_read_complete = false;
break;
case FASL_OP_COMMENT_1:
case FASL_OP_COMMENT_2:
fast_read_to_newline(reader);
current_read_complete = false;
break;
case FASL_OP_RESET_READER_DEFS:
FASL_READER_STREAM(reader)->table = NIL;
current_read_complete = false;
break;
case FASL_OP_READER_DEFINITION:
index = fast_read_table_index(reader);
fasl_table_entry = &(FASL_READER_STREAM(reader)->table->as.vector.data[index]);
fast_read(reader, fasl_table_entry, allow_loader_ops);
/* This should throw if the FASL table was resized
* during the call to read. */
assert(fasl_table_entry == &(FASL_READER_STREAM(reader)->table->as.vector.data[index]));
*retval = *fasl_table_entry;
break;
case FASL_OP_READER_REFERENCE:
index = fast_read_table_index(reader);
*retval = FASL_READER_STREAM(reader)->table->as.vector.data[index];
break;
case FASL_OP_EOF:
*retval = lmake_eof();
break;
case FASL_OP_LOADER_DEFINEQ:
case FASL_OP_LOADER_DEFINEA0:
if (!allow_loader_ops)
vmerror_fast_read(_T("loader definitions not allowed outside loader"), reader, NIL);
fast_read_loader_definition(reader, opcode);
current_read_complete = false;
break;
case FASL_OP_LOADER_APPLY0:
case FASL_OP_LOADER_APPLYN:
if (!allow_loader_ops)
vmerror_fast_read(_T("loader function applications not allowed outside loader"), reader, NIL);
fast_read_loader_application(reader, opcode);
break;
case FASL_OP_BEGIN_LOAD_UNIT:
if (!allow_loader_ops)
vmerror_fast_read(_T("load units are not allowed outside loader"), reader, NIL);
fast_read(reader, &name, allow_loader_ops);
dscwritef(DF_SHOW_FAST_LOAD_UNITS, ("; DEBUG: FASL entering unit ~s\n", name));
break;
case FASL_OP_END_LOAD_UNIT:
if (!allow_loader_ops)
vmerror_fast_read(_T("load units are not allowed outside loader"), reader, NIL);
fast_read(reader, &name, allow_loader_ops);
dscwritef(DF_SHOW_FAST_LOAD_UNITS, ("; DEBUG: FASL leaving unit ~s\n", name));
break;
case FASL_OP_LOADER_PUSH:
fast_loader_stack_push(reader, FASL_READER_STREAM(reader)->accum);
break;
case FASL_OP_LOADER_DROP:
fast_loader_stack_pop(reader);
break;
default:
vmerror_fast_read("invalid opcode", reader, fixcons(opcode));
}
}
}
lref_t lportp(lref_t obj)
{
return boolcons(PORTP(obj));
}
static lref_t execute_fast_op(lref_t fop, lref_t env)
{
lref_t retval = NIL;
lref_t sym;
lref_t binding;
lref_t fn;
lref_t args;
size_t argc;
lref_t argv[ARG_BUF_LEN];
lref_t after;
lref_t tag;
lref_t cell;
lref_t escape_retval;
jmp_buf *jmpbuf;
STACK_CHECK(&fop);
_process_interrupts();
fstack_enter_eval_frame(&fop, fop, env);
while(!NULLP(fop)) {
switch(fop->header.opcode)
{
case FOP_LITERAL:
retval = fop->as.fast_op.arg1;
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_REF:
sym = fop->as.fast_op.arg1;
binding = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(binding))
vmerror_unbound(sym);
retval = binding;
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_SET:
sym = fop->as.fast_op.arg1;
binding = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(binding))
vmerror_unbound(sym);
SET_SYMBOL_VCELL(sym, retval);
fop = fop->as.fast_op.next;
break;
case FOP_APPLY_GLOBAL:
sym = fop->as.fast_op.arg1;
fn = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(fn))
vmerror_unbound(sym);
argc = 0;
args = fop->as.fast_op.arg2;
while (CONSP(args)) {
if (argc >= ARG_BUF_LEN) {
vmerror_unsupported(_T("too many actual arguments"));
break;
}
argv[argc] = execute_fast_op(CAR(args), env);
args = CDR(args);
argc++;
}
if (!NULLP(args))
vmerror_arg_out_of_range(fop->as.fast_op.arg2,
_T("bad formal argument list"));
fop = apply(fn, argc, argv, &env, &retval);
break;
case FOP_APPLY:
argc = 0;
fn = execute_fast_op(fop->as.fast_op.arg1, env);
args = fop->as.fast_op.arg2;
while (CONSP(args)) {
if (argc >= ARG_BUF_LEN) {
vmerror_unsupported(_T("too many actual arguments"));
break;
}
argv[argc] = execute_fast_op(CAR(args), env);
args = CDR(args);
argc++;
}
if (!NULLP(args))
vmerror_arg_out_of_range(fop->as.fast_op.arg2,
_T("bad formal argument list"));
fop = apply(fn, argc, argv, &env, &retval);
break;
case FOP_IF_TRUE:
if (TRUEP(retval))
fop = fop->as.fast_op.arg1;
else
fop = fop->as.fast_op.arg2;
break;
case FOP_RETVAL:
fop = fop->as.fast_op.next;
break;
case FOP_SEQUENCE:
retval = execute_fast_op(fop->as.fast_op.arg1, env);
fop = fop->as.fast_op.arg2;
break;
case FOP_THROW:
tag = execute_fast_op(fop->as.fast_op.arg1, env);
escape_retval = execute_fast_op(fop->as.fast_op.arg2, env);
dscwritef(DF_SHOW_THROWS, (_T("; DEBUG: throw ~a, retval = ~a\n"), tag, escape_retval));
CURRENT_TIB()->escape_frame = find_matching_escape(CURRENT_TIB()->frame, tag);
CURRENT_TIB()->escape_value = escape_retval;
if (CURRENT_TIB()->escape_frame == NULL) {
/* If we don't find a matching catch for the throw, we have a
* problem and need to invoke a trap. */
vmtrap(TRAP_UNCAUGHT_THROW,
(enum vmt_options_t)(VMT_MANDATORY_TRAP | VMT_HANDLER_MUST_ESCAPE),
2, tag, escape_retval);
}
unwind_stack_for_throw();
fop = fop->as.fast_op.next;
break;
case FOP_CATCH:
tag = execute_fast_op(fop->as.fast_op.arg1, env);
jmpbuf = fstack_enter_catch_frame(tag, CURRENT_TIB()->frame);
dscwritef(DF_SHOW_THROWS, (_T("; DEBUG: setjmp tag: ~a, frame: ~c&, jmpbuf: ~c&\n"), tag, CURRENT_TIB()->frame, jmpbuf));
if (setjmp(*jmpbuf) == 0) {
retval = execute_fast_op(fop->as.fast_op.arg2, env);
} else {
dscwritef(DF_SHOW_THROWS, (_T("; DEBUG: catch, retval = ~a\n"), CURRENT_TIB()->escape_value));
retval = CURRENT_TIB()->escape_value;
CURRENT_TIB()->escape_value = NIL;
}
fstack_leave_frame();
fop = fop->as.fast_op.next;
break;
case FOP_WITH_UNWIND_FN:
fstack_enter_unwind_frame(execute_fast_op(fop->as.fast_op.arg1, env));
retval = execute_fast_op(fop->as.fast_op.arg2, env);
after = CURRENT_TIB()->frame[FOFS_UNWIND_AFTER];
fstack_leave_frame();
apply1(after, 0, NULL);
fop = fop->as.fast_op.next;
break;
case FOP_CLOSURE:
retval = lclosurecons(env,
lcons(lcar(fop->as.fast_op.arg1),
fop->as.fast_op.arg2),
lcdr(fop->as.fast_op.arg1));
fop = fop->as.fast_op.next;
break;
case FOP_CAR:
retval = lcar(retval);
fop = fop->as.fast_op.next;
break;
case FOP_CDR:
retval = lcdr(retval);
fop = fop->as.fast_op.next;
break;
case FOP_NOT:
retval = boolcons(!TRUEP(retval));
fop = fop->as.fast_op.next;
break;
case FOP_NULLP:
retval = boolcons(NULLP(retval));
fop = fop->as.fast_op.next;
break;
case FOP_EQP:
retval = boolcons(EQ(execute_fast_op(fop->as.fast_op.arg1, env),
execute_fast_op(fop->as.fast_op.arg2, env)));
fop = fop->as.fast_op.next;
break;
case FOP_GET_ENV:
retval = env;
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_DEF: // three args, third was genv, but currently unused
retval = lidefine_global(fop->as.fast_op.arg1, fop->as.fast_op.arg2);
fop = fop->as.fast_op.next;
break;
case FOP_GET_FSP:
retval = fixcons((fixnum_t)CURRENT_TIB()->fsp);
fop = fop->as.fast_op.next;
break;
case FOP_GET_FRAME:
retval = fixcons((fixnum_t)CURRENT_TIB()->frame);
fop = fop->as.fast_op.next;
break;
case FOP_GET_HFRAMES:
retval = CURRENT_TIB()->handler_frames;
fop = fop->as.fast_op.next;
break;
case FOP_SET_HFRAMES:
CURRENT_TIB()->handler_frames = execute_fast_op(fop->as.fast_op.arg1, env);
fop = fop->as.fast_op.next;
break;
case FOP_GLOBAL_PRESERVE_FRAME:
sym = fop->as.fast_op.arg1;
binding = SYMBOL_VCELL(sym);
if (UNBOUND_MARKER_P(binding))
vmerror_unbound(sym);
SET_SYMBOL_VCELL(sym, fixcons((fixnum_t)CURRENT_TIB()->frame));
retval = execute_fast_op(fop->as.fast_op.arg2, env);
fop = fop->as.fast_op.next;
break;
case FOP_STACK_BOUNDARY:
sym = execute_fast_op(fop->as.fast_op.arg1, env);
fstack_enter_boundary_frame(sym);
retval = execute_fast_op(fop->as.fast_op.arg2, env);
fstack_leave_frame();
fop = fop->as.fast_op.next;
break;
case FOP_FAST_ENQUEUE_CELL:
retval = execute_fast_op(fop->as.fast_op.arg2, env);
cell = execute_fast_op(fop->as.fast_op.arg1, env);
SET_CDR(CAR(retval), cell);
SET_CAR(retval, cell);
fop = fop->as.fast_op.next;
break;
case FOP_WHILE_TRUE:
while(TRUEP(execute_fast_op(fop->as.fast_op.arg1, env))) {
retval = execute_fast_op(fop->as.fast_op.arg2, env);
}
fop = fop->as.fast_op.next;
break;
case FOP_LOCAL_REF_BY_INDEX:
retval = lenvlookup_by_index(FIXNM(fop->as.fast_op.arg1),
FIXNM(fop->as.fast_op.arg2),
env);
fop = fop->as.fast_op.next;
break;
case FOP_LOCAL_REF_RESTARG:
retval = lenvlookup_restarg_by_index(FIXNM(fop->as.fast_op.arg1),
FIXNM(fop->as.fast_op.arg2),
env);
fop = fop->as.fast_op.next;
break;
case FOP_LOCAL_SET_BY_INDEX:
lenvlookup_set_by_index(FIXNM(fop->as.fast_op.arg1),
FIXNM(fop->as.fast_op.arg2),
env,
retval);
fop = fop->as.fast_op.next;
break;
default:
panic("Unsupported fast-op");
}
}
fstack_leave_frame();
return retval;
}