circuitpython/py/objfloat.c

145 lines
4.7 KiB
C

#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <math.h>
#include "nlr.h"
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "parsenum.h"
#include "runtime0.h"
#if MICROPY_ENABLE_FLOAT
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
#include "formatfloat.h"
#endif
STATIC void float_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
mp_obj_float_t *o = o_in;
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
char buf[32];
format_float(o->value, buf, sizeof(buf), 'g', 6, '\0');
print(env, "%s", buf);
if (strchr(buf, '.') == NULL) {
// Python floats always have decimal point
print(env, ".0");
}
#else
char buf[32];
sprintf(buf, "%.8g", (double) o->value);
print(env, buf);
if (strchr(buf, '.') == NULL) {
// Python floats always have decimal point
print(env, ".0");
}
#endif
}
STATIC mp_obj_t float_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
// TODO check n_kw == 0
switch (n_args) {
case 0:
return mp_obj_new_float(0);
case 1:
if (MP_OBJ_IS_STR(args[0])) {
// a string, parse it
uint l;
const char *s = mp_obj_str_get_data(args[0], &l);
return mp_parse_num_decimal(s, l, false, false);
} else if (MP_OBJ_IS_TYPE(args[0], &mp_type_float)) {
// a float, just return it
return args[0];
} else {
// something else, try to cast it to a float
return mp_obj_new_float(mp_obj_get_float(args[0]));
}
default:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "float takes at most 1 argument, %d given", 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 MP_UNARY_OP_BOOL: return MP_BOOL(o->value != 0);
case MP_UNARY_OP_POSITIVE: return o_in;
case MP_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, &mp_type_complex)) {
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 mp_type_float = {
{ &mp_type_type },
.name = MP_QSTR_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 = &mp_type_float;
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, &mp_type_float));
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 MP_BINARY_OP_ADD:
case MP_BINARY_OP_INPLACE_ADD: lhs_val += rhs_val; break;
case MP_BINARY_OP_SUBTRACT:
case MP_BINARY_OP_INPLACE_SUBTRACT: lhs_val -= rhs_val; break;
case MP_BINARY_OP_MULTIPLY:
case MP_BINARY_OP_INPLACE_MULTIPLY: lhs_val *= rhs_val; break;
// TODO: verify that C floor matches Python semantics
case MP_BINARY_OP_FLOOR_DIVIDE:
case MP_BINARY_OP_INPLACE_FLOOR_DIVIDE:
lhs_val = MICROPY_FLOAT_C_FUN(floor)(lhs_val / rhs_val);
goto check_zero_division;
case MP_BINARY_OP_TRUE_DIVIDE:
case MP_BINARY_OP_INPLACE_TRUE_DIVIDE:
lhs_val /= rhs_val;
check_zero_division:
if (isinf(lhs_val)){ // check for division by zero
nlr_raise(mp_obj_new_exception_msg(&mp_type_ZeroDivisionError, "float division by zero"));
}
break;
case MP_BINARY_OP_POWER:
case MP_BINARY_OP_INPLACE_POWER: lhs_val = MICROPY_FLOAT_C_FUN(pow)(lhs_val, rhs_val); break;
case MP_BINARY_OP_LESS: return MP_BOOL(lhs_val < rhs_val);
case MP_BINARY_OP_MORE: return MP_BOOL(lhs_val > rhs_val);
case MP_BINARY_OP_LESS_EQUAL: return MP_BOOL(lhs_val <= rhs_val);
case MP_BINARY_OP_MORE_EQUAL: return MP_BOOL(lhs_val >= rhs_val);
default:
return MP_OBJ_NULL; // op not supported
}
return mp_obj_new_float(lhs_val);
}
#endif // MICROPY_ENABLE_FLOAT