micropython/py/obj.c
Paul Sokolovsky dff3f896d7 mp_identity(): Add generic identity function.
Useful as getiter method for objects which are their own iterators, etc.
2014-01-20 18:42:08 +02:00

297 lines
9.6 KiB
C

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "mpqstr.h"
#include "obj.h"
#include "runtime0.h"
#include "runtime.h"
#include "map.h"
mp_obj_t mp_obj_get_type(mp_obj_t o_in) {
if (MP_OBJ_IS_SMALL_INT(o_in)) {
return (mp_obj_t)&int_type;
} else if (MP_OBJ_IS_QSTR(o_in)) {
return (mp_obj_t)&str_type;
} 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) {
if (MP_OBJ_IS_SMALL_INT(o_in)) {
return "int";
} else {
mp_obj_base_t *o = o_in;
return o->type->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) {
if (MP_OBJ_IS_SMALL_INT(o_in)) {
print(env, "%d", (int)MP_OBJ_SMALL_INT_VALUE(o_in));
} else if (MP_OBJ_IS_QSTR(o_in)) {
mp_obj_str_print_qstr(print, env, MP_OBJ_QSTR_VALUE(o_in), kind);
} else {
mp_obj_base_t *o = o_in;
if (o->type->print != NULL) {
o->type->print(print, env, o_in, kind);
} else {
print(env, "<%s>", o->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_TYPE(exc, &exception_type)) {
machine_uint_t n, *values;
mp_obj_exception_get_traceback(exc, &n, &values);
if (n > 0) {
printf("Traceback (most recent call last):\n");
for (int i = n - 3; i >= 0; i -= 3) {
printf(" File \"%s\", line %d, in %s\n", qstr_str(values[i]), (int)values[i + 1], qstr_str(values[i + 2]));
}
}
}
mp_obj_print(exc, PRINT_REPR);
printf("\n");
}
bool mp_obj_is_callable(mp_obj_t o_in) {
if (MP_OBJ_IS_SMALL_INT(o_in)) {
return false;
} else {
mp_obj_base_t *o = o_in;
return o->type->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_QSTR(o_in)) {
return MP_OBJ_QSTR_VALUE(o_in);
} else if (MP_OBJ_IS_TYPE(o_in, &none_type)) {
return (machine_int_t)o_in;
} else if (MP_OBJ_IS_TYPE(o_in, &str_type)) {
return mp_obj_str_get(o_in);
} else {
assert(0);
return 0;
}
}
// 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, &int_type)) {
// 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(RT_COMPARE_OP_EQUAL, o2, o1);
return r == mp_const_true ? true : false;
}
}
return false;
}
} else if (MP_OBJ_IS_QSTR(o1) || MP_OBJ_IS_QSTR(o2)) {
return false;
} else if (MP_OBJ_IS_TYPE(o1, &str_type) && MP_OBJ_IS_TYPE(o2, &str_type)) {
return mp_obj_str_get(o1) == mp_obj_str_get(o2);
} else {
mp_obj_base_t *o = o1;
if (o->type->binary_op != NULL) {
mp_obj_t r = o->type->binary_op(RT_COMPARE_OP_EQUAL, o1, o2);
if (r != MP_OBJ_NULL) {
return r == mp_const_true ? true : false;
}
}
// TODO: Debugging helper
printf("Equality for '%s' and '%s' types not yet implemented\n", mp_obj_get_type_str(o1), mp_obj_get_type_str(o2));
assert(0);
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, &int_type)) {
return mp_obj_int_get_checked(arg);
#if MICROPY_ENABLE_FLOAT
} else if (MP_OBJ_IS_TYPE(arg, &float_type)) {
// TODO work out if this should be floor, ceil or trunc
return (machine_int_t)mp_obj_float_get(arg);
#endif
} else {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "can't convert %s to int", mp_obj_get_type_str(arg)));
}
}
#if MICROPY_ENABLE_FLOAT
machine_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, &float_type)) {
return mp_obj_float_get(arg);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_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, &float_type)) {
*real = mp_obj_float_get(arg);
*imag = 0;
} else if (MP_OBJ_IS_TYPE(arg, &complex_type)) {
mp_obj_complex_get(arg, real, imag);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "can't convert %s to complex", mp_obj_get_type_str(arg)));
}
}
#endif
qstr mp_obj_get_qstr(mp_obj_t arg) {
if (MP_OBJ_IS_QSTR(arg)) {
return MP_OBJ_QSTR_VALUE(arg);
} else if (MP_OBJ_IS_TYPE(arg, &str_type)) {
return mp_obj_str_get(arg);
} else {
assert(0);
return 0;
}
}
mp_obj_t *mp_obj_get_array_fixed_n(mp_obj_t o_in, machine_int_t n) {
if (MP_OBJ_IS_TYPE(o_in, &tuple_type) || MP_OBJ_IS_TYPE(o_in, &list_type)) {
uint seq_len;
mp_obj_t *seq_items;
if (MP_OBJ_IS_TYPE(o_in, &tuple_type)) {
mp_obj_tuple_get(o_in, &seq_len, &seq_items);
} else {
mp_obj_list_get(o_in, &seq_len, &seq_items);
}
if (seq_len != n) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_IndexError, "requested length %d but object has length %d", n, seq_len));
}
return seq_items;
} else {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "object '%s' is not a tuple or list", mp_obj_get_type_str(o_in)));
}
}
uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index) {
// TODO False and True are considered 0 and 1 for indexing purposes
if (MP_OBJ_IS_SMALL_INT(index)) {
int i = MP_OBJ_SMALL_INT_VALUE(index);
if (i < 0) {
i += len;
}
if (i < 0 || i >= len) {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_IndexError, "%s index out of range", type->name));
}
return i;
} else {
nlr_jump(mp_obj_new_exception_msg_varg(MP_QSTR_TypeError, "%s indices must be integers, not %s", type->name, mp_obj_get_type_str(index)));
}
}
// may return MP_OBJ_NULL
mp_obj_t mp_obj_len_maybe(mp_obj_t o_in) {
mp_small_int_t len = 0;
if (MP_OBJ_IS_TYPE(o_in, &str_type)) {
len = strlen(qstr_str(mp_obj_str_get(o_in)));
} else if (MP_OBJ_IS_TYPE(o_in, &tuple_type)) {
uint seq_len;
mp_obj_t *seq_items;
mp_obj_tuple_get(o_in, &seq_len, &seq_items);
len = seq_len;
} else if (MP_OBJ_IS_TYPE(o_in, &list_type)) {
uint seq_len;
mp_obj_t *seq_items;
mp_obj_list_get(o_in, &seq_len, &seq_items);
len = seq_len;
} else if (MP_OBJ_IS_TYPE(o_in, &dict_type)) {
len = mp_obj_dict_len(o_in);
} else {
return MP_OBJ_NULL;
}
return MP_OBJ_NEW_SMALL_INT(len);
}
// 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;
}