micropython/py/objfloat.c

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#include <stdlib.h>
#include <stdint.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"
#if MICROPY_ENABLE_FLOAT
typedef struct _mp_obj_float_t {
mp_obj_base_t base;
mp_float_t value;
} mp_obj_float_t;
mp_obj_t mp_obj_new_float(mp_float_t value);
static void float_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in) {
mp_obj_float_t *o = o_in;
print(env, "%.8g", o->value);
}
// args are reverse in the array
static mp_obj_t float_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
switch (n_args) {
case 0:
return mp_obj_new_float(0);
case 1:
// TODO allow string as arg and parse it
if (MP_OBJ_IS_TYPE(args[0], &float_type)) {
return args[0];
} else {
return mp_obj_new_float(mp_obj_get_float(args[0]));
}
default:
nlr_jump(mp_obj_new_exception_msg_1_arg(MP_QSTR_TypeError, "float takes at most 1 argument, %d given", (void*)(machine_int_t)n_args));
}
}
static mp_obj_t float_unary_op(int op, mp_obj_t o_in) {
mp_obj_float_t *o = o_in;
switch (op) {
case RT_UNARY_OP_NOT: if (o->value != 0) { return mp_const_true;} else { return mp_const_false; }
case RT_UNARY_OP_POSITIVE: return o_in;
case RT_UNARY_OP_NEGATIVE: return mp_obj_new_float(-o->value);
default: return NULL; // op not supported
}
}
static mp_obj_t float_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
mp_obj_float_t *lhs = lhs_in;
if (MP_OBJ_IS_TYPE(rhs_in, &complex_type)) {
return mp_obj_complex_binary_op(op, lhs->value, 0, rhs_in);
} else {
return mp_obj_float_binary_op(op, lhs->value, rhs_in);
}
}
const mp_obj_type_t float_type = {
{ &mp_const_type },
"float",
.print = float_print,
.make_new = float_make_new,
.unary_op = float_unary_op,
.binary_op = float_binary_op,
};
mp_obj_t mp_obj_new_float(mp_float_t value) {
mp_obj_float_t *o = m_new(mp_obj_float_t, 1);
o->base.type = &float_type;
o->value = value;
return (mp_obj_t)o;
}
mp_float_t mp_obj_float_get(mp_obj_t self_in) {
assert(MP_OBJ_IS_TYPE(self_in, &float_type));
mp_obj_float_t *self = self_in;
return self->value;
}
mp_obj_t mp_obj_float_binary_op(int op, mp_float_t lhs_val, mp_obj_t rhs_in) {
mp_float_t rhs_val = mp_obj_get_float(rhs_in); // can be any type, this function will convert to float (if possible)
switch (op) {
case RT_BINARY_OP_ADD:
case RT_BINARY_OP_INPLACE_ADD: lhs_val += rhs_val; break;
case RT_BINARY_OP_SUBTRACT:
case RT_BINARY_OP_INPLACE_SUBTRACT: lhs_val -= rhs_val; break;
case RT_BINARY_OP_MULTIPLY:
case RT_BINARY_OP_INPLACE_MULTIPLY: lhs_val *= rhs_val; break;
/* TODO floor(?) the value
case RT_BINARY_OP_FLOOR_DIVIDE:
case RT_BINARY_OP_INPLACE_FLOOR_DIVIDE: val = lhs_val / rhs_val; break;
*/
case RT_BINARY_OP_TRUE_DIVIDE:
case RT_BINARY_OP_INPLACE_TRUE_DIVIDE: lhs_val /= rhs_val; break;
return NULL; // op not supported
}
return mp_obj_new_float(lhs_val);
}
#endif