circuitpython/py/objint.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 "qstr.h"
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#include "obj.h"
#include "objint.h"
// This dispatcher function is expected to be independent of the implementation
// of long int
static mp_obj_t int_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
// TODO check n_kw == 0
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switch (n_args) {
case 0:
return MP_OBJ_NEW_SMALL_INT(0);
case 1:
if (MP_OBJ_IS_STR(args[0])) {
// a string, parse it
uint l;
const byte *s = mp_obj_str_get_data(args[0], &l);
return MP_OBJ_NEW_SMALL_INT(strtonum((const char*)s, 0));
} else {
return MP_OBJ_NEW_SMALL_INT(mp_obj_get_int(args[0]));
}
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case 2:
{
// should be a string, parse it
// TODO proper error checking of argument types
uint l;
const byte *s = mp_obj_str_get_data(args[0], &l);
return MP_OBJ_NEW_SMALL_INT(strtonum((const char*)s, mp_obj_get_int(args[1])));
}
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default:
nlr_jump(mp_obj_new_exception_msg_1_arg(MP_QSTR_TypeError, "int takes at most 2 arguments, %d given", (void*)(machine_int_t)n_args));
}
}
#if MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_NONE
void int_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
if (MP_OBJ_IS_SMALL_INT(self_in)) {
print(env, "%d", (int)MP_OBJ_SMALL_INT_VALUE(self_in));
}
}
// This is called only for non-SMALL_INT
mp_obj_t int_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
assert(0);
return mp_const_none;
}
// This is called only with strings whose value doesn't fit in SMALL_INT
mp_obj_t mp_obj_new_int_from_long_str(const char *s) {
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_OverflowError, "long int not supported in this build"));
return mp_const_none;
}
mp_obj_t mp_obj_new_int_from_uint(machine_uint_t value) {
// SMALL_INT accepts only signed numbers, of one bit less size
// then word size, which totals 2 bits less for unsigned numbers.
if ((value & (WORD_MSBIT_HIGH | (WORD_MSBIT_HIGH >> 1))) == 0) {
return MP_OBJ_NEW_SMALL_INT(value);
}
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_OverflowError, "small int overflow"));
return mp_const_none;
}
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mp_obj_t mp_obj_new_int(machine_int_t value) {
if (MP_OBJ_FITS_SMALL_INT(value)) {
return MP_OBJ_NEW_SMALL_INT(value);
}
nlr_jump(mp_obj_new_exception_msg(MP_QSTR_OverflowError, "small int overflow"));
return mp_const_none;
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}
machine_int_t mp_obj_int_get(mp_obj_t self_in) {
return MP_OBJ_SMALL_INT_VALUE(self_in);
}
machine_int_t mp_obj_int_get_checked(mp_obj_t self_in) {
return MP_OBJ_SMALL_INT_VALUE(self_in);
}
#endif // MICROPY_LONGINT_IMPL == MICROPY_LONGINT_IMPL_NONE
const mp_obj_type_t int_type = {
{ &mp_const_type },
"int",
.print = int_print,
.make_new = int_make_new,
.binary_op = int_binary_op,
};