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Support tuples and list comprehension, albeit crude.

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This commit is contained in:
Damien 2013-10-16 16:12:52 +01:00
parent 152568bcb6
commit c226dca1f7
3 changed files with 139 additions and 37 deletions
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160
py/runtime.c
View File

@ -1,3 +1,6 @@
// in principle, rt_xxx functions are called only by vm/native/viper and make assumptions about args
// py_xxx functions are safer and can be called by anyone
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
@ -48,7 +51,10 @@ typedef enum {
O_FUN_BC,
O_FUN_ASM,
O_BOUND_METH,
O_TUPLE,
O_LIST,
O_TUPLE_IT,
O_LIST_IT,
O_SET,
O_MAP,
O_CLASS,
@ -121,11 +127,15 @@ struct _py_obj_base_t {
py_obj_t meth;
py_obj_t self;
} u_bound_meth;
struct { // for O_LIST
struct { // for O_TUPLE, O_LIST
int alloc;
int len;
py_obj_t *items;
} u_list;
} u_tuple_list;
struct { // for O_TUPLE_IT, O_LIST_IT
py_obj_base_t *obj;
int cur;
} u_tuple_list_it;
struct { // for O_SET
int alloc;
int used;
@ -330,14 +340,30 @@ py_obj_t py_obj_new_range_iterator(int cur, int stop, int step) {
return o;
}
py_obj_t list_append(py_obj_t self_in, py_obj_t arg) {
py_obj_t py_obj_new_tuple_iterator(py_obj_base_t *tuple, int cur) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_TUPLE_IT;
o->u_tuple_list_it.obj = tuple;
o->u_tuple_list_it.cur = cur;
return o;
}
py_obj_t py_obj_new_list_iterator(py_obj_base_t *list, int cur) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_LIST_IT;
o->u_tuple_list_it.obj = list;
o->u_tuple_list_it.cur = cur;
return o;
}
py_obj_t rt_list_append(py_obj_t self_in, py_obj_t arg) {
assert(IS_O(self_in, O_LIST));
py_obj_base_t *self = self_in;
if (self->u_list.len >= self->u_list.alloc) {
self->u_list.alloc *= 2;
self->u_list.items = m_renew(py_obj_t, self->u_list.items, self->u_list.alloc);
if (self->u_tuple_list.len >= self->u_tuple_list.alloc) {
self->u_tuple_list.alloc *= 2;
self->u_tuple_list.items = m_renew(py_obj_t, self->u_tuple_list.items, self->u_tuple_list.alloc);
}
self->u_list.items[self->u_list.len++] = arg;
self->u_tuple_list.items[self->u_tuple_list.len++] = arg;
return arg;
}
@ -346,6 +372,7 @@ static qstr q_print;
static qstr q_len;
static qstr q___build_class__;
static qstr q_AttributeError;
static qstr q_IndexError;
static qstr q_NameError;
static qstr q_TypeError;
@ -392,9 +419,9 @@ py_obj_t py_builtin_print(py_obj_t o) {
py_obj_t py_builtin_len(py_obj_t o_in) {
py_small_int_t len = 0;
if (IS_O(o_in, O_LIST)) {
if (IS_O(o_in, O_TUPLE) || IS_O(o_in, O_LIST)) {
py_obj_base_t *o = o_in;
len = o->u_list.len;
len = o->u_tuple_list.len;
} else if (IS_O(o_in, O_MAP)) {
py_obj_base_t *o = o_in;
len = o->u_map.used;
@ -437,6 +464,7 @@ void rt_init() {
q_len = qstr_from_str_static("len");
q___build_class__ = qstr_from_str_static("__build_class__");
q_AttributeError = qstr_from_str_static("AttributeError");
q_IndexError = qstr_from_str_static("IndexError");
q_NameError = qstr_from_str_static("NameError");
q_TypeError = qstr_from_str_static("TypeError");
@ -458,7 +486,7 @@ void rt_init() {
next_unique_code_id = 1;
unique_codes = NULL;
fun_list_append = rt_make_function_2(list_append);
fun_list_append = rt_make_function_2(rt_list_append);
#ifdef WRITE_NATIVE
fp_native = fopen("out-native", "wb");
@ -597,8 +625,14 @@ const char *py_obj_get_type_str(py_obj_t o_in) {
case O_FUN_N:
case O_FUN_BC:
return "function";
case O_TUPLE:
return "tuple";
case O_LIST:
return "list";
case O_TUPLE_IT:
return "tuple_iterator";
case O_LIST_IT:
return "list_iterator";
case O_SET:
return "set";
case O_MAP:
@ -639,13 +673,26 @@ void py_obj_print(py_obj_t o_in) {
printf("%s: ", qstr_str(o->u_exc2.id));
printf(o->u_exc2.fmt, o->u_exc2.s1, o->u_exc2.s2);
break;
case O_LIST:
printf("[");
for (int i = 0; i < o->u_list.len; i++) {
case O_TUPLE:
printf("(");
for (int i = 0; i < o->u_tuple_list.len; i++) {
if (i > 0) {
printf(", ");
}
py_obj_print(o->u_list.items[i]);
py_obj_print(o->u_tuple_list.items[i]);
}
if (o->u_tuple_list.len == 1) {
printf(",");
}
printf(")");
break;
case O_LIST:
printf("[");
for (int i = 0; i < o->u_tuple_list.len; i++) {
if (i > 0) {
printf(", ");
}
py_obj_print(o->u_tuple_list.items[i]);
}
printf("]");
break;
@ -711,7 +758,11 @@ int rt_is_true(py_obj_t arg) {
}
int rt_get_int(py_obj_t arg) {
if (IS_SMALL_INT(arg)) {
if (arg == py_const_false) {
return 0;
} else if (arg == py_const_true) {
return 1;
} else if (IS_SMALL_INT(arg)) {
return FROM_SMALL_INT(arg);
} else {
assert(0);
@ -778,11 +829,30 @@ py_obj_t rt_unary_op(int op, py_obj_t arg) {
return py_const_none;
}
uint get_index(py_obj_base_t *base, py_obj_t index) {
// assumes base is O_TUPLE or O_LIST
// TODO False and True are considered 0 and 1 for indexing purposes
int len = base->u_tuple_list.len;
if (IS_SMALL_INT(index)) {
int i = FROM_SMALL_INT(index);
if (i < 0) {
i += len;
}
if (i < 0 || i >= len) {
nlr_jump(py_obj_new_exception_2(q_IndexError, "%s index out of range", py_obj_get_type_str(base), NULL));
}
return i;
} else {
nlr_jump(py_obj_new_exception_2(q_TypeError, "%s indices must be integers, not %s", py_obj_get_type_str(base), py_obj_get_type_str(index)));
}
}
py_obj_t rt_binary_op(int op, py_obj_t lhs, py_obj_t rhs) {
DEBUG_OP_printf("binary %d %p %p\n", op, lhs, rhs);
if (op == RT_BINARY_OP_SUBSCR) {
if (IS_O(lhs, O_LIST) && IS_SMALL_INT(rhs)) {
return ((py_obj_base_t*)lhs)->u_list.items[FROM_SMALL_INT(rhs)];
if ((IS_O(lhs, O_TUPLE) || IS_O(lhs, O_LIST))) {
uint index = get_index(lhs, rhs);
return ((py_obj_base_t*)lhs)->u_tuple_list.items[index];
} else {
assert(0);
}
@ -945,9 +1015,10 @@ machine_uint_t rt_convert_obj_for_inline_asm(py_obj_t obj) {
return (machine_int_t)o->u_flt;
#endif
case O_TUPLE:
case O_LIST:
// pointer to start of list (could pass length, but then could use len(x) for that)
return (machine_uint_t)o->u_list.items;
// pointer to start of tuple/list (could pass length, but then could use len(x) for that)
return (machine_uint_t)o->u_tuple_list.items;
default:
// just pass along a pointer to the object
@ -1073,18 +1144,28 @@ py_obj_t rt_call_method_n(int n_args, const py_obj_t *args) {
return rt_call_function_n(args[n_args + 1], n_args + ((args[n_args] == NULL) ? 0 : 1), args);
}
// items are in reverse order
py_obj_t rt_build_tuple(int n_args, py_obj_t *items) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_TUPLE;
o->u_tuple_list.alloc = n_args < 4 ? 4 : n_args;
o->u_tuple_list.len = n_args;
o->u_tuple_list.items = m_new(py_obj_t, o->u_tuple_list.alloc);
for (int i = 0; i < n_args; i++) {
o->u_tuple_list.items[i] = items[n_args - i - 1];
}
return o;
}
// items are in reverse order
py_obj_t rt_build_list(int n_args, py_obj_t *items) {
py_obj_base_t *o = m_new(py_obj_base_t, 1);
o->kind = O_LIST;
o->u_list.alloc = n_args;
if (o->u_list.alloc < 4) {
o->u_list.alloc = 4;
}
o->u_list.len = n_args;
o->u_list.items = m_new(py_obj_t, o->u_list.alloc);
o->u_tuple_list.alloc = n_args < 4 ? 4 : n_args;
o->u_tuple_list.len = n_args;
o->u_tuple_list.items = m_new(py_obj_t, o->u_tuple_list.alloc);
for (int i = 0; i < n_args; i++) {
o->u_list.items[i] = items[n_args - i - 1];
o->u_tuple_list.items[i] = items[n_args - i - 1];
}
return o;
}
@ -1260,18 +1341,10 @@ void rt_store_attr(py_obj_t base, qstr attr, py_obj_t val) {
}
void rt_store_subscr(py_obj_t base, py_obj_t index, py_obj_t value) {
if (IS_O(base, O_LIST) && IS_SMALL_INT(index)) {
if (IS_O(base, O_LIST)) {
// list store
py_obj_base_t *o = base;
int idx = FROM_SMALL_INT(index);
if (idx < 0) {
idx += o->u_list.len;
}
if (0 <= idx && idx < o->u_list.len) {
o->u_list.items[idx] = value;
} else {
assert(0);
}
uint i = get_index(base, index);
((py_obj_base_t*)base)->u_tuple_list.items[i] = value;
} else if (IS_O(base, O_MAP)) {
// map store
py_map_lookup(base, index, true)->value = value;
@ -1284,6 +1357,10 @@ py_obj_t rt_getiter(py_obj_t o_in) {
if (IS_O(o_in, O_RANGE)) {
py_obj_base_t *o = o_in;
return py_obj_new_range_iterator(o->u_range.start, o->u_range.stop, o->u_range.step);
} else if (IS_O(o_in, O_TUPLE)) {
return py_obj_new_tuple_iterator(o_in, 0);
} else if (IS_O(o_in, O_LIST)) {
return py_obj_new_list_iterator(o_in, 0);
} else {
nlr_jump(py_obj_new_exception_2(q_TypeError, "'%s' object is not iterable", py_obj_get_type_str(o_in), NULL));
}
@ -1299,6 +1376,15 @@ py_obj_t rt_iternext(py_obj_t o_in) {
} else {
return py_const_stop_iteration;
}
} else if (IS_O(o_in, O_TUPLE_IT) || IS_O(o_in, O_LIST_IT)) {
py_obj_base_t *o = o_in;
if (o->u_tuple_list_it.cur < o->u_tuple_list_it.obj->u_tuple_list.len) {
py_obj_t o_out = o->u_tuple_list_it.obj->u_tuple_list.items[o->u_tuple_list_it.cur];
o->u_tuple_list_it.cur += 1;
return o_out;
} else {
return py_const_stop_iteration;
}
} else {
nlr_jump(py_obj_new_exception_2(q_TypeError, "? '%s' object is not iterable", py_obj_get_type_str(o_in), NULL));
}

2
py/runtime.h
View File

@ -116,7 +116,9 @@ py_obj_t rt_call_function_n(py_obj_t fun, int n_args, const py_obj_t *args);
py_obj_t rt_call_method_1(py_obj_t fun, py_obj_t self);
py_obj_t rt_call_method_2(py_obj_t fun, py_obj_t self, py_obj_t arg);
py_obj_t rt_call_method_n(int n_args, const py_obj_t *args);
py_obj_t rt_build_tuple(int n_args, py_obj_t *items);
py_obj_t rt_build_list(int n_args, py_obj_t *items);
py_obj_t rt_list_append(py_obj_t list, py_obj_t arg);
py_obj_t rt_build_map(int n_args);
py_obj_t rt_store_map(py_obj_t map, py_obj_t key, py_obj_t value);
py_obj_t rt_build_set(int n_args, py_obj_t *items);

14
py/vm.c
View File

@ -268,6 +268,13 @@ py_obj_t py_execute_byte_code(const byte *code, uint len, const py_obj_t *args,
*sp = rt_compare_op(unum, obj1, obj2);
break;
case PYBC_BUILD_TUPLE:
DECODE_UINT;
obj1 = rt_build_tuple(unum, sp);
sp += unum - 1;
*sp = obj1;
break;
case PYBC_BUILD_LIST:
DECODE_UINT;
obj1 = rt_build_list(unum, sp);
@ -275,6 +282,13 @@ py_obj_t py_execute_byte_code(const byte *code, uint len, const py_obj_t *args,
*sp = obj1;
break;
case PYBC_LIST_APPEND:
DECODE_UINT;
// I think it's guaranteed by the compiler that sp[unum] is a list
rt_list_append(sp[unum], sp[0]);
sp++;
break;
case PYBC_BUILD_MAP:
DECODE_UINT;
PUSH(rt_build_map(unum));