circuitpython/py/obj.c

319 lines
10 KiB
C

#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "runtime0.h"
#include "runtime.h"
mp_obj_type_t *mp_obj_get_type(mp_obj_t o_in) {
if (MP_OBJ_IS_SMALL_INT(o_in)) {
return (mp_obj_t)&mp_type_int;
} else if (MP_OBJ_IS_QSTR(o_in)) {
return (mp_obj_t)&mp_type_str;
} else {
mp_obj_base_t *o = o_in;
return (mp_obj_t)o->type;
}
}
const char *mp_obj_get_type_str(mp_obj_t o_in) {
return qstr_str(mp_obj_get_type(o_in)->name);
}
void printf_wrapper(void *env, const char *fmt, ...) {
va_list args;
va_start(args, fmt);
vprintf(fmt, args);
va_end(args);
}
void mp_obj_print_helper(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_type_t *type = mp_obj_get_type(o_in);
if (type->print != NULL) {
type->print(print, env, o_in, kind);
} else {
print(env, "<%s>", qstr_str(type->name));
}
}
void mp_obj_print(mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_print_helper(printf_wrapper, NULL, o_in, kind);
}
// helper function to print an exception with traceback
void mp_obj_print_exception(mp_obj_t exc) {
if (mp_obj_is_exception_instance(exc)) {
machine_uint_t n, *values;
mp_obj_exception_get_traceback(exc, &n, &values);
if (n > 0) {
assert(n % 3 == 0);
printf("Traceback (most recent call last):\n");
for (int i = n - 3; i >= 0; i -= 3) {
#if MICROPY_ENABLE_SOURCE_LINE
printf(" File \"%s\", line %d, in %s\n", qstr_str(values[i]), (int)values[i + 1], qstr_str(values[i + 2]));
#else
printf(" File \"%s\", in %s\n", qstr_str(values[i]), qstr_str(values[i + 2]));
#endif
}
}
}
mp_obj_print(exc, PRINT_REPR);
printf("\n");
}
int mp_obj_is_true(mp_obj_t arg) {
if (arg == mp_const_false) {
return 0;
} else if (arg == mp_const_true) {
return 1;
} else if (arg == mp_const_none) {
return 0;
} else if (MP_OBJ_IS_SMALL_INT(arg)) {
if (MP_OBJ_SMALL_INT_VALUE(arg) == 0) {
return 0;
} else {
return 1;
}
} else {
mp_obj_type_t *type = mp_obj_get_type(arg);
if (type->unary_op != NULL) {
mp_obj_t result = type->unary_op(MP_UNARY_OP_BOOL, arg);
if (result != MP_OBJ_NULL) {
return result == mp_const_true;
}
}
mp_obj_t len = mp_obj_len_maybe(arg);
if (len != MP_OBJ_NULL) {
// obj has a length, truth determined if len != 0
return len != MP_OBJ_NEW_SMALL_INT(0);
} else {
// any other obj is true per Python semantics
return 1;
}
}
}
bool mp_obj_is_callable(mp_obj_t o_in) {
return mp_obj_get_type(o_in)->call != NULL;
}
machine_int_t mp_obj_hash(mp_obj_t o_in) {
if (o_in == mp_const_false) {
return 0; // needs to hash to same as the integer 0, since False==0
} else if (o_in == mp_const_true) {
return 1; // needs to hash to same as the integer 1, since True==1
} else if (MP_OBJ_IS_SMALL_INT(o_in)) {
return MP_OBJ_SMALL_INT_VALUE(o_in);
} else if (MP_OBJ_IS_STR(o_in)) {
return mp_obj_str_get_hash(o_in);
} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_NoneType)) {
return (machine_int_t)o_in;
} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_fun_native) || MP_OBJ_IS_TYPE(o_in, &mp_type_fun_bc)) {
return (machine_int_t)o_in;
} else if (MP_OBJ_IS_TYPE(o_in, &mp_type_tuple)) {
return mp_obj_tuple_hash(o_in);
// TODO hash class and instances
// TODO delegate to __hash__ method if it exists
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "unhashable type: '%s'", mp_obj_get_type_str(o_in)));
}
}
// this function implements the '==' operator (and so the inverse of '!=')
// from the python language reference:
// "The objects need not have the same type. If both are numbers, they are converted
// to a common type. Otherwise, the == and != operators always consider objects of
// different types to be unequal."
// note also that False==0 and True==1 are true expressions
bool mp_obj_equal(mp_obj_t o1, mp_obj_t o2) {
if (o1 == o2) {
return true;
} else if (MP_OBJ_IS_SMALL_INT(o1) || MP_OBJ_IS_SMALL_INT(o2)) {
if (MP_OBJ_IS_SMALL_INT(o1) && MP_OBJ_IS_SMALL_INT(o2)) {
return false;
} else {
if (MP_OBJ_IS_SMALL_INT(o2)) {
mp_obj_t temp = o1; o1 = o2; o2 = temp;
}
// o1 is the SMALL_INT, o2 is not
mp_small_int_t val = MP_OBJ_SMALL_INT_VALUE(o1);
if (o2 == mp_const_false) {
return val == 0;
} else if (o2 == mp_const_true) {
return val == 1;
} else if (MP_OBJ_IS_TYPE(o2, &mp_type_int)) {
// If o2 is long int, dispatch to its virtual methods
mp_obj_base_t *o = o2;
if (o->type->binary_op != NULL) {
mp_obj_t r = o->type->binary_op(MP_BINARY_OP_EQUAL, o2, o1);
return r == mp_const_true ? true : false;
}
}
return false;
}
} else if (MP_OBJ_IS_STR(o1) && MP_OBJ_IS_STR(o2)) {
return mp_obj_str_equal(o1, o2);
} else {
mp_obj_base_t *o = o1;
if (o->type->binary_op != NULL) {
mp_obj_t r = o->type->binary_op(MP_BINARY_OP_EQUAL, o1, o2);
if (r != MP_OBJ_NULL) {
return r == mp_const_true ? true : false;
}
}
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_NotImplementedError,
"Equality for '%s' and '%s' types not yet implemented", mp_obj_get_type_str(o1), mp_obj_get_type_str(o2)));
return false;
}
}
bool mp_obj_less(mp_obj_t o1, mp_obj_t o2) {
if (MP_OBJ_IS_SMALL_INT(o1) && MP_OBJ_IS_SMALL_INT(o2)) {
mp_small_int_t i1 = MP_OBJ_SMALL_INT_VALUE(o1);
mp_small_int_t i2 = MP_OBJ_SMALL_INT_VALUE(o2);
return i1 < i2;
} else {
assert(0);
return false;
}
}
machine_int_t mp_obj_get_int(mp_obj_t arg) {
if (arg == mp_const_false) {
return 0;
} else if (arg == mp_const_true) {
return 1;
} else if (MP_OBJ_IS_SMALL_INT(arg)) {
return MP_OBJ_SMALL_INT_VALUE(arg);
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
return mp_obj_int_get_checked(arg);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to int", mp_obj_get_type_str(arg)));
}
}
#if MICROPY_ENABLE_FLOAT
mp_float_t mp_obj_get_float(mp_obj_t arg) {
if (arg == mp_const_false) {
return 0;
} else if (arg == mp_const_true) {
return 1;
} else if (MP_OBJ_IS_SMALL_INT(arg)) {
return MP_OBJ_SMALL_INT_VALUE(arg);
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
return mp_obj_int_as_float(arg);
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_float)) {
return mp_obj_float_get(arg);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to float", mp_obj_get_type_str(arg)));
}
}
void mp_obj_get_complex(mp_obj_t arg, mp_float_t *real, mp_float_t *imag) {
if (arg == mp_const_false) {
*real = 0;
*imag = 0;
} else if (arg == mp_const_true) {
*real = 1;
*imag = 0;
} else if (MP_OBJ_IS_SMALL_INT(arg)) {
*real = MP_OBJ_SMALL_INT_VALUE(arg);
*imag = 0;
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
*real = mp_obj_int_as_float(arg);
*imag = 0;
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_float)) {
*real = mp_obj_float_get(arg);
*imag = 0;
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_complex)) {
mp_obj_complex_get(arg, real, imag);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "can't convert %s to complex", mp_obj_get_type_str(arg)));
}
}
#endif
void mp_obj_get_array(mp_obj_t o, uint *len, mp_obj_t **items) {
if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) {
mp_obj_tuple_get(o, len, items);
} else if (MP_OBJ_IS_TYPE(o, &mp_type_list)) {
mp_obj_list_get(o, len, items);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o)));
}
}
void mp_obj_get_array_fixed_n(mp_obj_t o, uint len, mp_obj_t **items) {
if (MP_OBJ_IS_TYPE(o, &mp_type_tuple) || MP_OBJ_IS_TYPE(o, &mp_type_list)) {
uint seq_len;
if (MP_OBJ_IS_TYPE(o, &mp_type_tuple)) {
mp_obj_tuple_get(o, &seq_len, items);
} else {
mp_obj_list_get(o, &seq_len, items);
}
if (seq_len != len) {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "requested length %d but object has length %d", len, seq_len));
}
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o)));
}
}
// is_slice determines whether the index is a slice index
uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index, bool is_slice) {
int i;
if (MP_OBJ_IS_SMALL_INT(index)) {
i = MP_OBJ_SMALL_INT_VALUE(index);
} else if (MP_OBJ_IS_TYPE(index, &mp_type_bool)) {
i = (index == mp_const_true ? 1 : 0);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s indices must be integers, not %s", qstr_str(type->name), mp_obj_get_type_str(index)));
}
if (i < 0) {
i += len;
}
if (is_slice) {
if (i < 0) {
i = 0;
} else if (i > len) {
i = len;
}
} else {
if (i < 0 || i >= len) {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "%s index out of range", qstr_str(type->name)));
}
}
return i;
}
// may return MP_OBJ_NULL
mp_obj_t mp_obj_len_maybe(mp_obj_t o_in) {
if (MP_OBJ_IS_STR(o_in)) {
return MP_OBJ_NEW_SMALL_INT((machine_int_t)mp_obj_str_get_len(o_in));
} else {
mp_obj_type_t *type = mp_obj_get_type(o_in);
if (type->unary_op != NULL) {
return type->unary_op(MP_UNARY_OP_LEN, o_in);
} else {
return MP_OBJ_NULL;
}
}
}
// Return input argument. Useful as .getiter for objects which are
// their own iterators, etc.
mp_obj_t mp_identity(mp_obj_t self) {
return self;
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_identity_obj, mp_identity);