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-rw-r--r--builtin.cpp334
1 files changed, 246 insertions, 88 deletions
diff --git a/builtin.cpp b/builtin.cpp
index 8d3e21d..f1e4c19 100644
--- a/builtin.cpp
+++ b/builtin.cpp
@@ -7,6 +7,7 @@
#include "model.h"
#include "exc.h"
#include "types.h"
+#include "gc.h"
using std::stringstream;
@@ -45,7 +46,9 @@ Pair *SpecialOptIf::call(Pair *args, Environment * &envt,
{
if (ret_info->state == empty_list)
{
- *top_ptr++ = TO_PAIR(args->cdr)->car;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(TO_PAIR(args->cdr)->car);
+ gc.expose(args);
return ret_addr->next; // Move to the next instruction
}
else
@@ -59,30 +62,38 @@ Pair *SpecialOptIf::call(Pair *args, Environment * &envt,
{
second->next = NULL;
// Undo pop and invoke again
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = empty_list;
+ gc.expose(args);
return second;
}
else if (third != empty_list)
{
third->next = NULL;
// Undo pop and invoke again
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = empty_list;
+ gc.expose(args);
return third;
}
else
{
- *top_ptr++ = unspec_obj;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(unspec_obj);
+ gc.expose(args);
return ret_addr->next;
}
}
}
else
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(TO_PAIR(ret_addr->car)->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
throw NormalError(INT_ERR);
@@ -160,7 +171,9 @@ Pair *SpecialOptLambda::call(Pair *args, Environment * &envt,
for (Pair *ptr = body; ptr != empty_list; ptr = TO_PAIR(ptr->cdr))
ptr->next = NULL; // Make each expression isolated
- *top_ptr++ = new ProcObj(body, envt, params);
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(new ProcObj(body, envt, params));
+ gc.expose(args);
return ret_addr->next; // Move to the next instruction
}
@@ -195,9 +208,11 @@ Pair *SpecialOptDefine::call(Pair *args, Environment * &envt,
{
if (!ret_info->state)
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(TO_PAIR(pc->cdr)->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
if (!first->is_sym_obj())
@@ -233,7 +248,9 @@ Pair *SpecialOptDefine::call(Pair *args, Environment * &envt,
obj = new ProcObj(body, envt, params);
}
envt->add_binding(id, obj);
- *top_ptr++ = unspec_obj;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(unspec_obj);
+ gc.expose(args);
return ret_addr->next;
}
@@ -264,9 +281,11 @@ Pair *SpecialOptSet::call(Pair *args, Environment * &envt,
if (!ret_info->state)
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(TO_PAIR(pc->cdr)->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
@@ -277,7 +296,9 @@ Pair *SpecialOptSet::call(Pair *args, Environment * &envt,
bool flag = envt->add_binding(id, TO_PAIR(args->cdr)->car, false);
if (!flag) throw TokenError(id->ext_repr(), RUN_ERR_UNBOUND_VAR);
- *top_ptr++ = unspec_obj;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(unspec_obj);
+ gc.expose(args);
return ret_addr->next;
}
@@ -292,7 +313,9 @@ Pair *SpecialOptQuote::call(Pair *args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr) {
Pair *ret_addr = static_cast<RetAddr*>(*top_ptr)->addr;
Pair *pc = static_cast<Pair*>(ret_addr->car);
- *top_ptr++ = TO_PAIR(pc->cdr)->car;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(TO_PAIR(pc->cdr)->car);
+ gc.expose(args);
return ret_addr->next;
}
@@ -310,14 +333,20 @@ Pair *SpecialOptEval::call(Pair *args, Environment * &envt,
Pair *ret_addr = ret_info->addr;
if (ret_info->state)
{
- *top_ptr++ = TO_PAIR(args->cdr)->car;
+ gc.expose(ret_info->state); // Exec done
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(TO_PAIR(args->cdr)->car);
+ gc.expose(args);
return ret_addr->next; // Move to the next instruction
}
else
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(args->cdr);
+ gc.attach(ret_info->state); // Or it will be released
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
throw NormalError(INT_ERR);
@@ -336,14 +365,18 @@ Pair *SpecialOptAnd::call(Pair *args, Environment * &envt,
Pair *pc = static_cast<Pair*>(ret_addr->car);
if (pc->cdr == empty_list)
{
- *top_ptr++ = new BoolObj(true);
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(new BoolObj(true));
+ gc.expose(args);
return ret_addr->next;
}
if (!ret_info->state)
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(pc->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
EvalObj *ret = TO_PAIR(args->cdr)->car;
@@ -351,20 +384,26 @@ Pair *SpecialOptAnd::call(Pair *args, Environment * &envt,
{
if (ret_info->state->cdr == empty_list) // the last member
{
- *top_ptr++ = ret;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(ret);
+ gc.expose(args);
return ret_addr->next;
}
else
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(ret_info->state->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
}
else
{
- *top_ptr++ = ret;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(ret);
+ gc.expose(args);
return ret_addr->next;
}
throw NormalError(INT_ERR);
@@ -383,14 +422,18 @@ Pair *SpecialOptOr::call(Pair *args, Environment * &envt,
Pair *pc = static_cast<Pair*>(ret_addr->car);
if (pc->cdr == empty_list)
{
- *top_ptr++ = new BoolObj(false);
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(new BoolObj(false));
+ gc.expose(args);
return ret_addr->next;
}
if (!ret_info->state)
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(pc->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
EvalObj *ret = TO_PAIR(args->cdr)->car;
@@ -398,20 +441,26 @@ Pair *SpecialOptOr::call(Pair *args, Environment * &envt,
{
if (ret_info->state->cdr == empty_list) // the last member
{
- *top_ptr++ = ret;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(ret);
+ gc.expose(args);
return ret_addr->next;
}
else
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = TO_PAIR(ret_info->state->cdr);
ret_info->state->next = NULL;
+ gc.expose(args);
return ret_info->state;
}
}
else
{
- *top_ptr++ = ret;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(ret);
+ gc.expose(args);
return ret_addr->next;
}
throw NormalError(INT_ERR);
@@ -421,8 +470,9 @@ SpecialOptApply::SpecialOptApply() : SpecialOptObj("apply") {}
void SpecialOptApply::prepare(Pair *pc) {}
-Pair *SpecialOptApply::call(Pair *args, Environment * &envt,
+Pair *SpecialOptApply::call(Pair *_args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr) {
+ Pair *args = _args;
top_ptr++; // Recover the return address
if (args->cdr == empty_list)
throw TokenError(name, RUN_ERR_WRONG_NUM_OF_ARGS);
@@ -431,13 +481,13 @@ Pair *SpecialOptApply::call(Pair *args, Environment * &envt,
if (!args->car->is_opt_obj())
throw TokenError("an operator", RUN_ERR_WRONG_TYPE);
- *top_ptr++ = args->car; // Push the operator into the stack
- args = TO_PAIR(args->cdr); // Examine arguments
+ *top_ptr++ = gc.attach(args->car); // Push the operator into the stack
+ args = TO_PAIR(args->cdr); // Examine arguments
if (args == empty_list)
throw TokenError(name, RUN_ERR_WRONG_NUM_OF_ARGS);
for (; args->cdr != empty_list; args = TO_PAIR(args->cdr))
- *top_ptr++ = args->car; // Add leading arguments: arg_1 ...
+ *top_ptr++ = gc.attach(args->car); // Add leading arguments: arg_1 ...
if (args->car != empty_list) // args->car is the trailing args
{
@@ -448,7 +498,7 @@ Pair *SpecialOptApply::call(Pair *args, Environment * &envt,
EvalObj *nptr;
for (;;)
{
- *top_ptr++ = args->car;
+ *top_ptr++ = gc.attach(args->car);
if ((nptr = args->cdr)->is_pair_obj())
args = TO_PAIR(nptr);
else break;
@@ -457,6 +507,7 @@ Pair *SpecialOptApply::call(Pair *args, Environment * &envt,
throw TokenError("a list", RUN_ERR_WRONG_TYPE);
}
// force the invocation, so that the desired operator will take over
+ gc.expose(_args);
return NULL;
}
@@ -468,8 +519,9 @@ void SpecialOptForce::prepare(Pair *pc) {
throw TokenError(name, RUN_ERR_WRONG_NUM_OF_ARGS);
}
-Pair *SpecialOptForce::call(Pair *args, Environment * &envt,
+Pair *SpecialOptForce::call(Pair *_args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr) {
+ Pair *args = _args;
args = TO_PAIR(args->cdr);
RetAddr *ret_info = static_cast<RetAddr*>(*top_ptr);
Pair *ret_addr = ret_info->addr;
@@ -477,7 +529,9 @@ Pair *SpecialOptForce::call(Pair *args, Environment * &envt,
{
EvalObj *mem = args->car;
prom->feed_mem(mem);
- *top_ptr++ = mem;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(mem);
+ gc.expose(_args);
return ret_addr->next; // Move to the next instruction
}
else
@@ -488,14 +542,18 @@ Pair *SpecialOptForce::call(Pair *args, Environment * &envt,
EvalObj *mem = prom->get_mem();
if (mem) // fetch from memorized result
{
- *top_ptr++ = mem;
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(mem);
+ gc.expose(_args);
return ret_addr->next;
}
else // force
{
- top_ptr += 2;
+ gc.attach(static_cast<EvalObj*>(*(++top_ptr)));
+ top_ptr++;
ret_info->state = prom->get_entry();
ret_info->state->next = NULL;
+ gc.expose(_args);
return ret_info->state;
}
}
@@ -514,7 +572,9 @@ Pair *SpecialOptDelay::call(Pair *args, Environment * &envt,
Continuation * &cont, FrameObj ** &top_ptr) {
Pair *ret_addr = static_cast<RetAddr*>(*top_ptr)->addr;
Pair *pc = static_cast<Pair*>(ret_addr->car);
- *top_ptr++ = new PromObj(TO_PAIR(pc->cdr)->car);
+ delete *top_ptr;
+ *top_ptr++ = gc.attach(new PromObj(TO_PAIR(pc->cdr)->car));
+ gc.expose(args);
return ret_addr->next; // Move to the next instruction
}
@@ -562,7 +622,7 @@ BUILTIN_PROC_DEF(pair_cdr) {
BUILTIN_PROC_DEF(make_list) {
- return args;
+ return gc.attach(args); // Or it will be GCed
}
BUILTIN_PROC_DEF(num_add) {
@@ -574,11 +634,16 @@ BUILTIN_PROC_DEF(num_add) {
throw TokenError("a number", RUN_ERR_WRONG_TYPE);
opr = static_cast<NumObj*>(args->car);
NumObj *_res = res;
- if (_res->level < opr->level)
- opr = _res->convert(opr);
+ if (res->level < opr->level)
+ {
+ res->add(opr = res->convert(opr));
+ delete opr;
+ }
else
- _res = opr->convert(_res);
- res = _res->add(opr);
+ {
+ (res = opr->convert(res))->add(opr);
+ delete _res;
+ }
}
return res;
}
@@ -589,12 +654,15 @@ BUILTIN_PROC_DEF(num_sub) {
throw TokenError("a number", RUN_ERR_WRONG_TYPE);
NumObj *res = static_cast<NumObj*>(args->car), *opr;
+ res = res->clone();
args = TO_PAIR(args->cdr);
if (args == empty_list)
{
- IntNumObj _zero(0);
- NumObj *zero = res->convert(&_zero);
- return zero->sub(res);
+ IntNumObj *_zero = new IntNumObj(0);
+ NumObj *zero = res->convert(_zero);
+ if (zero != _zero) delete _zero;
+ zero->sub(res);
+ return zero;
}
for (; args != empty_list; args = TO_PAIR(args->cdr))
{
@@ -603,16 +671,20 @@ BUILTIN_PROC_DEF(num_sub) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
NumObj *_res = res;
- if (_res->level < opr->level)
- opr = _res->convert(opr);
+ if (res->level < opr->level)
+ {
+ res->sub(opr = res->convert(opr));
+ delete opr;
+ }
else
- _res = opr->convert(_res);
- res = _res->sub(opr);
+ {
+ (res = opr->convert(res))->sub(opr);
+ delete _res;
+ }
}
return res;
}
-
BUILTIN_PROC_DEF(num_mul) {
// ARGS_AT_LEAST_ONE;
NumObj *res = new IntNumObj(1), *opr; // the most accurate type
@@ -622,11 +694,16 @@ BUILTIN_PROC_DEF(num_mul) {
throw TokenError("a number", RUN_ERR_WRONG_TYPE);
opr = static_cast<NumObj*>(args->car);
NumObj *_res = res;
- if (_res->level < opr->level)
- opr = _res->convert(opr);
+ if (res->level < opr->level)
+ {
+ res->mul(opr = res->convert(opr));
+ delete opr;
+ }
else
- _res = opr->convert(_res);
- res = _res->mul(opr);
+ {
+ (res = opr->convert(res))->mul(opr);
+ delete _res;
+ }
}
return res;
}
@@ -635,13 +712,20 @@ BUILTIN_PROC_DEF(num_div) {
ARGS_AT_LEAST_ONE;
if (!args->car->is_num_obj())
throw TokenError("a number", RUN_ERR_WRONG_TYPE);
+
NumObj *res = static_cast<NumObj*>(args->car), *opr;
+ if (res->level > NUM_LVL_RAT)
+ res = new RatNumObj(static_cast<IntNumObj*>(res)->val);
+ else res = res->clone();
+
args = TO_PAIR(args->cdr);
if (args == empty_list)
{
- IntNumObj _one(1);
- NumObj *one = res->convert(&_one);
- return one->div(res);
+ IntNumObj *_one = new IntNumObj(1);
+ NumObj *one = res->convert(_one);
+ if (one != _one) delete _one;
+ one->div(res);
+ return one;
}
for (; args != empty_list; args = TO_PAIR(args->cdr))
{
@@ -650,15 +734,21 @@ BUILTIN_PROC_DEF(num_div) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
NumObj *_res = res;
- if (_res->level < opr->level)
- opr = _res->convert(opr);
+ if (res->level < opr->level)
+ {
+ res->div(opr = res->convert(opr));
+ delete opr;
+ }
else
- _res = opr->convert(_res);
- res = _res->div(opr);
+ {
+ (res = opr->convert(res))->div(opr);
+ delete _res;
+ }
}
return res;
}
+
BUILTIN_PROC_DEF(num_le) {
if (args == empty_list)
return new BoolObj(true);
@@ -675,16 +765,28 @@ BUILTIN_PROC_DEF(num_le) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
if (last->level < opr->level)
- opr = last->convert(opr);
+ {
+ if (!last->le(opr = last->convert(opr)))
+ {
+ delete opr;
+ return new BoolObj(false);
+ }
+ else delete opr;
+ }
else
- last = opr->convert(last);
- if (!last->le(opr))
- return new BoolObj(false);
+ {
+ if (!(last = opr->convert(last))->le(opr))
+ {
+ delete last;
+ return new BoolObj(false);
+ }
+ else delete last;
+ }
}
return new BoolObj(true);
}
-BUILTIN_PROC_DEF(num_ge) {
+BUILTIN_PROC_DEF(num_lt) {
if (args == empty_list)
return new BoolObj(true);
// zero arguments
@@ -700,17 +802,28 @@ BUILTIN_PROC_DEF(num_ge) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
if (last->level < opr->level)
- opr = last->convert(opr);
+ {
+ if (!last->lt(opr = last->convert(opr)))
+ {
+ delete opr;
+ return new BoolObj(false);
+ }
+ else delete opr;
+ }
else
- last = opr->convert(last);
- if (!last->ge(opr))
- return new BoolObj(false);
+ {
+ if (!(last = opr->convert(last))->lt(opr))
+ {
+ delete last;
+ return new BoolObj(false);
+ }
+ else delete last;
+ }
}
return new BoolObj(true);
}
-
-BUILTIN_PROC_DEF(num_lt) {
+BUILTIN_PROC_DEF(num_ge) {
if (args == empty_list)
return new BoolObj(true);
// zero arguments
@@ -726,11 +839,23 @@ BUILTIN_PROC_DEF(num_lt) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
if (last->level < opr->level)
- opr = last->convert(opr);
+ {
+ if (!last->ge(opr = last->convert(opr)))
+ {
+ delete opr;
+ return new BoolObj(false);
+ }
+ else delete opr;
+ }
else
- last = opr->convert(last);
- if (!last->lt(opr))
- return new BoolObj(false);
+ {
+ if (!(last = opr->convert(last))->ge(opr))
+ {
+ delete last;
+ return new BoolObj(false);
+ }
+ else delete last;
+ }
}
return new BoolObj(true);
}
@@ -751,11 +876,23 @@ BUILTIN_PROC_DEF(num_gt) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
if (last->level < opr->level)
- opr = last->convert(opr);
+ {
+ if (!last->gt(opr = last->convert(opr)))
+ {
+ delete opr;
+ return new BoolObj(false);
+ }
+ else delete opr;
+ }
else
- last = opr->convert(last);
- if (!last->gt(opr))
- return new BoolObj(false);
+ {
+ if (!(last = opr->convert(last))->gt(opr))
+ {
+ delete last;
+ return new BoolObj(false);
+ }
+ else delete last;
+ }
}
return new BoolObj(true);
}
@@ -776,15 +913,28 @@ BUILTIN_PROC_DEF(num_eq) {
opr = static_cast<NumObj*>(args->car);
// upper type conversion
if (last->level < opr->level)
- opr = last->convert(opr);
+ {
+ if (!last->eq(opr = last->convert(opr)))
+ {
+ delete opr;
+ return new BoolObj(false);
+ }
+ else delete opr;
+ }
else
- last = opr->convert(last);
- if (!last->eq(opr))
- return new BoolObj(false);
+ {
+ if (!(last = opr->convert(last))->eq(opr))
+ {
+ delete last;
+ return new BoolObj(false);
+ }
+ else delete last;
+ }
}
return new BoolObj(true);
}
+
BUILTIN_PROC_DEF(bool_not) {
ARGS_EXACTLY_ONE;
return new BoolObj(!args->car->is_true());
@@ -1148,7 +1298,9 @@ BUILTIN_PROC_DEF(is_integer) {
BUILTIN_PROC_DEF(num_abs) {
ARGS_EXACTLY_ONE;
CHECK_NUMBER(args->car);
- return static_cast<NumObj*>(args->car)->abs();
+ NumObj* num = static_cast<NumObj*>(args->car)->clone();
+ num->abs();
+ return num;
}
BUILTIN_PROC_DEF(num_mod) {
@@ -1159,7 +1311,9 @@ BUILTIN_PROC_DEF(num_mod) {
NumObj* b = static_cast<NumObj*>(TO_PAIR(args->cdr)->car);
CHECK_INT(a);
CHECK_INT(b);
- return static_cast<IntNumObj*>(a)->mod(b);
+ NumObj* res = a->clone();
+ static_cast<IntNumObj*>(res)->mod(b);
+ return res;
}
BUILTIN_PROC_DEF(num_rem) {
@@ -1170,7 +1324,9 @@ BUILTIN_PROC_DEF(num_rem) {
NumObj* b = static_cast<NumObj*>(TO_PAIR(args->cdr)->car);
CHECK_INT(a);
CHECK_INT(b);
- return static_cast<IntNumObj*>(a)->rem(b);
+ NumObj* res = a->clone();
+ static_cast<IntNumObj*>(res)->rem(b);
+ return res;
}
BUILTIN_PROC_DEF(num_quo) {
@@ -1181,12 +1337,14 @@ BUILTIN_PROC_DEF(num_quo) {
NumObj* b = static_cast<NumObj*>(TO_PAIR(args->cdr)->car);
CHECK_INT(a);
CHECK_INT(b);
- return static_cast<IntNumObj*>(a)->quo(b);
+ NumObj* res = a->clone();
+ static_cast<IntNumObj*>(res)->div(b);
+ return res;
}
BUILTIN_PROC_DEF(num_gcd) {
// ARGS_AT_LEAST_ONE;
- NumObj *res = new IntNumObj(0);
+ IntNumObj *res = new IntNumObj(0);
IntNumObj *opr;
for (;args != empty_list; args = TO_PAIR(args->cdr))
{
@@ -1194,14 +1352,14 @@ BUILTIN_PROC_DEF(num_gcd) {
CHECK_INT(static_cast<NumObj*>(args->car));
opr = static_cast<IntNumObj*>(args->car);
- res = opr->gcd(res);
+ res->gcd(opr);
}
return res;
}
BUILTIN_PROC_DEF(num_lcm) {
// ARGS_AT_LEAST_ONE;
- NumObj *res = new IntNumObj(1);
+ IntNumObj *res = new IntNumObj(1);
IntNumObj *opr;
for (;args != empty_list; args = TO_PAIR(args->cdr))
{
@@ -1209,7 +1367,7 @@ BUILTIN_PROC_DEF(num_lcm) {
CHECK_INT(static_cast<NumObj*>(args->car));
opr = static_cast<IntNumObj*>(args->car);
- res = opr->lcm(res);
+ res->lcm(opr);
}
return res;
}
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