static pic_value
pic_regexp_regexp_match(pic_state *pic)
{
pic_value reg;
const char *input;
regmatch_t match[100];
pic_value matches, positions;
pic_str *str;
int i, offset;
pic_get_args(pic, "oz", ®, &input);
pic_assert_type(pic, reg, regexp);
matches = pic_nil_value();
positions = pic_nil_value();
if (strchr(pic_regexp_data_ptr(reg)->flags, 'g') != NULL) {
/* global search */
offset = 0;
while (regexec(&pic_regexp_data_ptr(reg)->reg, input, 1, match, 0) != REG_NOMATCH) {
pic_push(pic, pic_obj_value(pic_str_new(pic, input, match[0].rm_eo - match[0].rm_so)), matches);
pic_push(pic, pic_int_value(offset), positions);
offset += match[0].rm_eo;
input += match[0].rm_eo;
}
} else {
/* local search */
if (regexec(&pic_regexp_data_ptr(reg)->reg, input, 100, match, 0) == 0) {
for (i = 0; i < 100; ++i) {
if (match[i].rm_so == -1) {
break;
}
str = pic_str_new(pic, input + match[i].rm_so, match[i].rm_eo - match[i].rm_so);
pic_push(pic, pic_obj_value(str), matches);
pic_push(pic, pic_int_value(match[i].rm_so), positions);
}
}
}
if (pic_nil_p(matches)) {
matches = pic_false_value();
positions = pic_false_value();
} else {
matches = pic_reverse(pic, matches);
positions = pic_reverse(pic, positions);
}
return pic_values2(pic, matches, positions);
}
static pic_value
weak_call(pic_state *pic)
{
pic_value key, val, weak;
int n;
n = pic_get_args(pic, "o|o", &key, &val);
if (! pic_obj_p(pic, key)) {
pic_error(pic, "attempted to set a non-object key", 1, key);
}
weak = pic_closure_ref(pic, 0);
if (n == 1) {
if (! pic_weak_has(pic, weak, key)) {
return pic_false_value(pic);
}
return pic_cons(pic, key, pic_weak_ref(pic, weak, key));
} else {
if (pic_undef_p(pic, val)) {
if (pic_weak_has(pic, weak, key)) {
pic_weak_del(pic, weak, key);
}
} else {
pic_weak_set(pic, weak, key, val);
}
return pic_undef_value(pic);
}
}
static pic_value
reg_get(pic_state *pic, struct pic_reg *reg, void *key)
{
if (! pic_reg_has(pic, reg, key)) {
return pic_false_value();
}
return pic_cons(pic, pic_obj_value(key), pic_reg_ref(pic, reg, key));
}
static pic_value
pic_bool_boolean_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return (pic_true_p(v) || pic_false_p(v)) ? pic_true_value() : pic_false_value();
}
/* TODO: replace it with native opcode */
static pic_value
pic_bool_not(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_false_p(v) ? pic_true_value() : pic_false_value();
}
static pic_value
pic_macro_variable_eq_p(pic_state *pic)
{
size_t argc, i;
pic_value *argv;
pic_get_args(pic, "*", &argc, &argv);
for (i = 0; i < argc; ++i) {
if (! pic_var_p(argv[i])) {
return pic_false_value();
}
if (! pic_equal_p(pic, argv[i], argv[0])) {
return pic_false_value();
}
}
return pic_true_value();
}
static pic_value
pic_bool_boolean_eq_p(pic_state *pic)
{
size_t argc, i;
pic_value *argv;
pic_get_args(pic, "*", &argc, &argv);
for (i = 0; i < argc; ++i) {
if (! (pic_true_p(argv[i]) || pic_false_p(argv[i]))) {
return pic_false_value();
}
if (! pic_eq_p(argv[i], argv[0])) {
return pic_false_value();
}
}
return pic_true_value();
}
static pic_value
pic_char_char_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
return pic_char_p(pic, v) ? pic_true_value(pic) : pic_false_value(pic);
}
static pic_value
pic_number_nan_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_float_p(pic, v) && isnan(pic_float(pic, v)))
return pic_true_value(pic);
else
return pic_false_value(pic);
}
void
pic_init_error(pic_state *pic)
{
pic_defvar(pic, "current-exception-handlers", pic_nil_value(pic), pic_false_value(pic));
pic_defun(pic, "with-exception-handler", pic_error_with_exception_handler);
pic_defun(pic, "raise", pic_error_raise);
pic_defun(pic, "raise-continuable", pic_error_raise_continuable);
pic_defun(pic, "error", pic_error_error);
pic_defun(pic, "error-object?", pic_error_error_object_p);
pic_defun(pic, "error-object-message", pic_error_error_object_message);
pic_defun(pic, "error-object-irritants", pic_error_error_object_irritants);
pic_defun(pic, "error-object-type", pic_error_error_object_type);
}
static pic_value
pic_dict_dictionary_ref(pic_state *pic)
{
struct pic_dict *dict;
pic_sym *key;
pic_get_args(pic, "dm", &dict, &key);
if (! pic_dict_has(pic, dict, key)) {
return pic_false_value();
}
return pic_cons(pic, pic_obj_value(key), pic_dict_ref(pic, dict, key));
}
static pic_value
native_exception_handler(pic_state *pic)
{
pic_value err;
pic_get_args(pic, "o", &err);
pic->err = err;
pic_call(pic, pic_closure_ref(pic, 0), 1, pic_false_value(pic));
PIC_UNREACHABLE();
}
static pic_value
pic_port_eof_object_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_vtype(v) == PIC_VTYPE_EOF) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_port_binary_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_BINARY) != 0) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_number_finite_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_int_p(pic, v))
return pic_true_value(pic);
if (pic_float_p(pic, v) && ! (isinf(pic_float(pic, v)) || isnan(pic_float(pic, v))))
return pic_true_value(pic);
else
return pic_false_value(pic);
}
static pic_value
pic_port_textual_port_p(pic_state *pic)
{
pic_value v;
pic_get_args(pic, "o", &v);
if (pic_port_p(v) && (pic_port_ptr(v)->flags & PIC_PORT_TEXT) != 0) {
return pic_true_value();
}
else {
return pic_false_value();
}
}
static pic_value
pic_error_file_error_p(pic_state *pic)
{
pic_value v;
struct pic_error *e;
pic_get_args(pic, "o", &v);
if (! pic_error_p(v)) {
return pic_false_value();
}
e = pic_error_ptr(v);
return pic_bool_value(e->type == PIC_ERROR_FILE);
}
pic_value
pic_native_exception_handler(pic_state *pic)
{
pic_value err;
struct pic_proc *cont;
pic_get_args(pic, "o", &err);
pic->err = err;
cont = pic_proc_ptr(pic_proc_env_ref(pic, pic_get_proc(pic), "cont"));
pic_apply1(pic, cont, pic_false_value());
PIC_UNREACHABLE();
}
static pic_value
native_exception_handler(pic_state *pic)
{
pic_value err;
struct pic_proc *cont;
pic_get_args(pic, "o", &err);
pic->err = err;
cont = pic_proc_ptr(pic_attr_ref(pic, pic_obj_value(pic_get_proc(pic)), "@@escape"));
pic_apply1(pic, cont, pic_false_value());
PIC_UNREACHABLE();
}
pic_value
pic_file_exists_p(pic_state *pic)
{
char *fname;
FILE *fp;
pic_get_args(pic, "z", &fname);
fp = fopen(fname, "r");
if (fp) {
fclose(fp);
return pic_true_value();
} else {
return pic_false_value();
}
}
pic_value
pic_apply(pic_state *pic, struct pic_proc *proc, pic_value argv)
{
struct pic_code *pc, c;
int ai = pic_gc_arena_preserve(pic);
jmp_buf jmp;
size_t argc, i;
struct pic_code boot[2];
#if PIC_DIRECT_THREADED_VM
static void *oplabels[] = {
&&L_OP_POP, &&L_OP_PUSHNIL, &&L_OP_PUSHTRUE, &&L_OP_PUSHFALSE, &&L_OP_PUSHFLOAT,
&&L_OP_PUSHINT, &&L_OP_PUSHCHAR, &&L_OP_PUSHCONST,
&&L_OP_GREF, &&L_OP_GSET, &&L_OP_LREF, &&L_OP_LSET, &&L_OP_CREF, &&L_OP_CSET,
&&L_OP_JMP, &&L_OP_JMPIF, &&L_OP_CALL, &&L_OP_TAILCALL, &&L_OP_RET, &&L_OP_LAMBDA,
&&L_OP_CONS, &&L_OP_CAR, &&L_OP_CDR, &&L_OP_NILP,
&&L_OP_ADD, &&L_OP_SUB, &&L_OP_MUL, &&L_OP_DIV,
&&L_OP_EQ, &&L_OP_LT, &&L_OP_LE, &&L_OP_STOP
};
#endif
if (setjmp(jmp) == 0) {
pic->jmp = &jmp;
}
else {
goto L_RAISE;
}
argc = pic_length(pic, argv) + 1;
#if VM_DEBUG
puts("== booting VM...");
printf(" proc = ");
pic_debug(pic, pic_obj_value(proc));
puts("");
printf(" argv = ");
pic_debug(pic, argv);
puts("");
printf(" irep = ");
print_irep(pic, proc->u.irep);
puts("\nLet's go!");
#endif
PUSH(pic_obj_value(proc));
for (i = 1; i < argc; ++i) {
PUSH(pic_car(pic, argv));
argv = pic_cdr(pic, argv);
}
/* boot! */
boot[0].insn = OP_CALL;
boot[0].u.i = argc;
boot[1].insn = OP_STOP;
pc = boot;
c = *pc;
goto L_CALL;
VM_LOOP {
CASE(OP_POP) {
POPN(1);
NEXT;
}
CASE(OP_PUSHNIL) {
PUSH(pic_nil_value());
NEXT;
}
CASE(OP_PUSHTRUE) {
PUSH(pic_true_value());
NEXT;
}
CASE(OP_PUSHFALSE) {
PUSH(pic_false_value());
NEXT;
}
CASE(OP_PUSHFLOAT) {
PUSH(pic_float_value(c.u.f));
NEXT;
}
CASE(OP_PUSHINT) {
PUSH(pic_int_value(c.u.i));
NEXT;
}
CASE(OP_PUSHCHAR) {
PUSH(pic_char_value(c.u.c));
NEXT;
}
CASE(OP_PUSHCONST) {
PUSH(pic->pool[c.u.i]);
NEXT;
}
CASE(OP_GREF) {
PUSH(pic->globals[c.u.i]);
NEXT;
}
CASE(OP_GSET) {
pic->globals[c.u.i] = POP();
NEXT;
}
CASE(OP_LREF) {
PUSH(pic->ci->fp[c.u.i]);
NEXT;
}
CASE(OP_LSET) {
pic->ci->fp[c.u.i] = POP();
NEXT;
}
CASE(OP_CREF) {
int depth = c.u.r.depth;
struct pic_env *env;
env = pic->ci->env;
while (depth--) {
env = env->up;
}
PUSH(env->values[c.u.r.idx]);
NEXT;
}
CASE(OP_CSET) {
int depth = c.u.r.depth;
struct pic_env *env;
env = pic->ci->env;
while (depth--) {
env = env->up;
}
env->values[c.u.r.idx] = POP();
NEXT;
}
CASE(OP_JMP) {
pc += c.u.i;
JUMP;
}
CASE(OP_JMPIF) {
pic_value v;
v = POP();
if (! pic_false_p(v)) {
pc += c.u.i;
JUMP;
}
NEXT;
}
CASE(OP_CALL) {
pic_value x, v;
pic_callinfo *ci;
struct pic_proc *proc;
L_CALL:
x = pic->sp[-c.u.i];
if (! pic_proc_p(x)) {
pic->errmsg = "invalid application";
goto L_RAISE;
}
proc = pic_proc_ptr(x);
ci = PUSHCI();
ci->argc = c.u.i;
ci->pc = pc;
ci->fp = pic->sp - c.u.i;
ci->env = NULL;
if (pic_proc_cfunc_p(x)) {
v = proc->u.cfunc(pic);
pic->sp = ci->fp;
POPCI();
PUSH(v);
pic_gc_arena_restore(pic, ai);
NEXT;
}
else {
int i;
pic_value rest;
if (ci->argc != proc->u.irep->argc) {
if (! (proc->u.irep->varg && ci->argc >= proc->u.irep->argc)) {
pic->errmsg = "wrong number of arguments";
goto L_RAISE;
}
}
/* prepare rest args */
if (proc->u.irep->varg) {
rest = pic_nil_value();
for (i = 0; i < ci->argc - proc->u.irep->argc; ++i) {
pic_gc_protect(pic, v = POP());
rest = pic_cons(pic, v, rest);
}
PUSH(rest);
}
/* prepare env */
if (proc->u.irep->cv_num == 0) {
ci->env = proc->env;
}
else {
ci->env = (struct pic_env *)pic_obj_alloc(pic, sizeof(struct pic_env), PIC_TT_ENV);
ci->env->up = proc->env;
ci->env->valuec = proc->u.irep->cv_num;
ci->env->values = (pic_value *)pic_calloc(pic, ci->env->valuec, sizeof(pic_value));
for (i = 0; i < ci->env->valuec; ++i) {
ci->env->values[i] = ci->fp[proc->u.irep->cv_tbl[i]];
}
}
pc = proc->u.irep->code;
pic_gc_arena_restore(pic, ai);
JUMP;
}
}
CASE(OP_TAILCALL) {
int argc;
pic_value *argv;
argc = c.u.i;
argv = pic->sp - argc;
for (i = 0; i < argc; ++i) {
pic->ci->fp[i] = argv[i];
}
pic->sp = pic->ci->fp + argc;
pc = POPCI()->pc;
/* c is not changed */
goto L_CALL;
}
CASE(OP_RET) {
pic_value v;
pic_callinfo *ci;
if (pic->errmsg) {
L_RAISE:
goto L_STOP;
}
else {
v = POP();
ci = POPCI();
pc = ci->pc;
pic->sp = ci->fp;
PUSH(v);
}
NEXT;
}
CASE(OP_LAMBDA) {
struct pic_proc *proc;
proc = pic_proc_new(pic, pic->irep[c.u.i], pic->ci->env);
PUSH(pic_obj_value(proc));
pic_gc_arena_restore(pic, ai);
NEXT;
}
CASE(OP_CONS) {
pic_value a, b;
pic_gc_protect(pic, b = POP());
pic_gc_protect(pic, a = POP());
PUSH(pic_cons(pic, a, b));
pic_gc_arena_restore(pic, ai);
NEXT;
}
CASE(OP_CAR) {
pic_value p;
p = POP();
PUSH(pic_car(pic, p));
NEXT;
}
CASE(OP_CDR) {
pic_value p;
p = POP();
PUSH(pic_cdr(pic, p));
NEXT;
}
CASE(OP_NILP) {
pic_value p;
p = POP();
PUSH(pic_bool_value(pic_nil_p(p)));
NEXT;
}
#define DEFINE_ARITH_OP(opcode, op) \
CASE(opcode) { \
pic_value a, b; \
b = POP(); \
a = POP(); \
if (pic_int_p(a) && pic_int_p(b)) { \
double f = (double)pic_int(a) op (double)pic_int(b); \
if (INT_MIN <= f && f <= INT_MAX) { \
PUSH(pic_int_value((int)f)); \
} \
else { \
PUSH(pic_float_value(f)); \
} \
} \
else if (pic_float_p(a) && pic_float_p(b)) { \
PUSH(pic_float_value(pic_float(a) op pic_float(b))); \
} \
else if (pic_int_p(a) && pic_float_p(b)) { \
PUSH(pic_float_value(pic_int(a) op pic_float(b))); \
} \
else if (pic_float_p(a) && pic_int_p(b)) { \
PUSH(pic_float_value(pic_float(a) op pic_int(b))); \
} \
else { \
pic->errmsg = #op " got non-number operands"; \
goto L_RAISE; \
} \
NEXT; \
}
DEFINE_ARITH_OP(OP_ADD, +);
DEFINE_ARITH_OP(OP_SUB, -);
DEFINE_ARITH_OP(OP_MUL, *);
/* special care for (int / int) division */
CASE(OP_DIV) {
pic_value a, b;
b = POP();
a = POP();
if (pic_int_p(a) && pic_int_p(b)) {
PUSH(pic_float_value((double)pic_int(a) / pic_int(b)));
}
else if (pic_float_p(a) && pic_float_p(b)) {
PUSH(pic_float_value(pic_float(a) / pic_float(b)));
}
else if (pic_int_p(a) && pic_float_p(b)) {
PUSH(pic_float_value(pic_int(a) / pic_float(b)));
}
else if (pic_float_p(a) && pic_int_p(b)) {
PUSH(pic_float_value(pic_float(a) / pic_int(b)));
}
else {
pic->errmsg = "/ got non-number operands";
goto L_RAISE;
}
NEXT;
}
#define DEFINE_COMP_OP(opcode, op) \
CASE(opcode) { \
pic_value a, b; \
b = POP(); \
a = POP(); \
if (pic_int_p(a) && pic_int_p(b)) { \
PUSH(pic_bool_value(pic_int(a) op pic_int(b))); \
} \
else if (pic_float_p(a) && pic_float_p(b)) { \
PUSH(pic_bool_value(pic_float(a) op pic_float(b))); \
} \
else if (pic_int_p(a) && pic_int_p(b)) { \
PUSH(pic_bool_value(pic_int(a) op pic_float(b))); \
} \
else if (pic_float_p(a) && pic_int_p(b)) { \
PUSH(pic_bool_value(pic_float(a) op pic_int(b))); \
} \
else { \
pic->errmsg = #op " got non-number operands"; \
goto L_RAISE; \
} \
NEXT; \
}
DEFINE_COMP_OP(OP_EQ, ==);
DEFINE_COMP_OP(OP_LT, <);
DEFINE_COMP_OP(OP_LE, <=);
CASE(OP_STOP) {
pic_value val;
L_STOP:
val = POP();
pic->jmp = NULL;
if (pic->errmsg) {
return pic_undef_value();
}
#if VM_DEBUG
puts("**VM END STATE**");
printf("stbase\t= %p\nsp\t= %p\n", pic->stbase, pic->sp);
printf("cibase\t= %p\nci\t= %p\n", pic->cibase, pic->ci);
if (pic->stbase < pic->sp) {
pic_value *sp;
printf("* stack trace:");
for (sp = pic->stbase; pic->sp != sp; ++sp) {
pic_debug(pic, *sp);
puts("");
}
}
if (pic->stbase > pic->sp) {
puts("*** stack underflow!");
}
#endif
pic_gc_protect(pic, val);
return val;
}
} VM_LOOP_END;
}
void
pic_defvar(pic_state *pic, const char *name, pic_value init)
{
pic_define(pic, name, pic_make_var(pic, init, pic_false_value(pic)));
}