kopia lustrzana https://github.com/micropython/micropython
493 wiersze
18 KiB
C
493 wiersze
18 KiB
C
#include <stdbool.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "objtuple.h"
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#include "objfun.h"
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#include "runtime0.h"
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#include "runtime.h"
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#include "bc.h"
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#if 0 // print debugging info
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#define DEBUG_PRINT (1)
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#else // don't print debugging info
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#define DEBUG_printf(...) (void)0
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#endif
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/******************************************************************************/
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/* native functions */
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// mp_obj_fun_native_t defined in obj.h
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STATIC void check_nargs(mp_obj_fun_native_t *self, int n_args, int n_kw) {
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mp_check_nargs(n_args, self->n_args_min, self->n_args_max, n_kw, self->is_kw);
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}
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void mp_check_nargs(int n_args, machine_uint_t n_args_min, machine_uint_t n_args_max, int n_kw, bool is_kw) {
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if (n_kw && !is_kw) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError,
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"function does not take keyword arguments"));
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}
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if (n_args_min == n_args_max) {
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if (n_args != n_args_min) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function takes %d positional arguments but %d were given",
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n_args_min, n_args));
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}
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} else {
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if (n_args < n_args_min) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"<fun name>() missing %d required positional arguments: <list of names of params>",
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n_args_min - n_args));
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} else if (n_args > n_args_max) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"<fun name> expected at most %d arguments, got %d",
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n_args_max, n_args));
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}
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}
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}
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STATIC mp_obj_t fun_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
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switch (op) {
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case MP_BINARY_OP_EQUAL:
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// These objects can be equal only if it's the same underlying structure,
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// we don't even need to check for 2nd arg type.
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return MP_BOOL(lhs_in == rhs_in);
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}
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return NULL;
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}
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STATIC mp_obj_t fun_native_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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assert(MP_OBJ_IS_TYPE(self_in, &mp_type_fun_native));
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mp_obj_fun_native_t *self = self_in;
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// check number of arguments
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check_nargs(self, n_args, n_kw);
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if (self->is_kw) {
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// function allows keywords
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// we create a map directly from the given args array
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mp_map_t kw_args;
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mp_map_init_fixed_table(&kw_args, n_kw, args + n_args);
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return ((mp_fun_kw_t)self->fun)(n_args, args, &kw_args);
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} else if (self->n_args_min <= 3 && self->n_args_min == self->n_args_max) {
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// function requires a fixed number of arguments
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// dispatch function call
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switch (self->n_args_min) {
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case 0:
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return ((mp_fun_0_t)self->fun)();
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case 1:
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return ((mp_fun_1_t)self->fun)(args[0]);
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case 2:
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return ((mp_fun_2_t)self->fun)(args[0], args[1]);
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case 3:
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return ((mp_fun_3_t)self->fun)(args[0], args[1], args[2]);
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default:
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assert(0);
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return mp_const_none;
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}
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} else {
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// function takes a variable number of arguments, but no keywords
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return ((mp_fun_var_t)self->fun)(n_args, args);
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}
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}
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const mp_obj_type_t mp_type_fun_native = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_native_call,
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.binary_op = fun_binary_op,
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};
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// fun must have the correct signature for n_args fixed arguments
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mp_obj_t mp_make_function_n(int n_args, void *fun) {
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mp_obj_fun_native_t *o = m_new_obj(mp_obj_fun_native_t);
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o->base.type = &mp_type_fun_native;
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o->is_kw = false;
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o->n_args_min = n_args;
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o->n_args_max = n_args;
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o->fun = fun;
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return o;
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}
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mp_obj_t mp_make_function_var(int n_args_min, mp_fun_var_t fun) {
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mp_obj_fun_native_t *o = m_new_obj(mp_obj_fun_native_t);
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o->base.type = &mp_type_fun_native;
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o->is_kw = false;
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o->n_args_min = n_args_min;
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o->n_args_max = MP_OBJ_FUN_ARGS_MAX;
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o->fun = fun;
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return o;
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}
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// min and max are inclusive
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mp_obj_t mp_make_function_var_between(int n_args_min, int n_args_max, mp_fun_var_t fun) {
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mp_obj_fun_native_t *o = m_new_obj(mp_obj_fun_native_t);
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o->base.type = &mp_type_fun_native;
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o->is_kw = false;
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o->n_args_min = n_args_min;
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o->n_args_max = n_args_max;
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o->fun = fun;
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return o;
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}
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/******************************************************************************/
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/* byte code functions */
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#if DEBUG_PRINT
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STATIC void dump_args(const mp_obj_t *a, int sz) {
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DEBUG_printf("%p: ", a);
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for (int i = 0; i < sz; i++) {
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DEBUG_printf("%p ", a[i]);
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}
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DEBUG_printf("\n");
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}
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#else
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#define dump_args(...) (void)0
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#endif
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// If it's possible to call a function without allocating new argument array,
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// this function returns true, together with pointers to 2 subarrays to be used
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// as arguments. Otherwise, it returns false. It is expected that this fucntion
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// will be accompanied by another, mp_obj_fun_prepare_full_args(), which will
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// instead take pointer to full-length out-array, and will fill it in. Rationale
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// being that a caller can try this function and if it succeeds, the function call
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// can be made without allocating extra memory. Otherwise, caller can allocate memory
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// and try "full" function. These functions are expected to be refactoring of
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// code in fun_bc_call() and evenrually replace it.
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bool mp_obj_fun_prepare_simple_args(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args,
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uint *out_args1_len, const mp_obj_t **out_args1, uint *out_args2_len, const mp_obj_t **out_args2) {
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mp_obj_fun_bc_t *self = self_in;
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assert(n_kw == 0);
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assert(self->takes_var_args == 0);
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assert(self->takes_kw_args == 0);
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mp_obj_t *extra_args = self->extra_args + self->n_def_args;
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uint n_extra_args = 0;
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if (n_args > self->n_args) {
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goto arg_error;
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} else {
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extra_args -= self->n_args - n_args;
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n_extra_args += self->n_args - n_args;
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}
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*out_args1 = args;
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*out_args1_len = n_args;
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*out_args2 = extra_args;
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*out_args2_len = n_extra_args;
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return true;
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arg_error:
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "function takes %d positional arguments but %d were given", self->n_args, n_args));
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}
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STATIC mp_obj_t fun_bc_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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DEBUG_printf("Input n_args: %d, n_kw: %d\n", n_args, n_kw);
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DEBUG_printf("Input pos args: ");
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dump_args(args, n_args);
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DEBUG_printf("Input kw args: ");
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dump_args(args + n_args, n_kw * 2);
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mp_obj_fun_bc_t *self = self_in;
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DEBUG_printf("Func n_def_args: %d\n", self->n_def_args);
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const mp_obj_t *kwargs = args + n_args;
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mp_obj_t *extra_args = self->extra_args + self->n_def_args;
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uint n_extra_args = 0;
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// check positional arguments
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if (n_args > self->n_args) {
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// given more than enough arguments
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if (!self->takes_var_args) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function takes %d positional arguments but %d were given", self->n_args, n_args));
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}
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// put extra arguments in varargs tuple
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*extra_args = mp_obj_new_tuple(n_args - self->n_args, args + self->n_args);
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n_extra_args = 1;
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n_args = self->n_args;
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} else {
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if (self->takes_var_args) {
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DEBUG_printf("passing empty tuple as *args\n");
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*extra_args = mp_const_empty_tuple;
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n_extra_args = 1;
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}
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// Apply processing and check below only if we don't have kwargs,
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// otherwise, kw handling code below has own extensive checks.
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if (n_kw == 0) {
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if (n_args >= self->n_args - self->n_def_args) {
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// given enough arguments, but may need to use some default arguments
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extra_args -= self->n_args - n_args;
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n_extra_args += self->n_args - n_args;
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} else {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function takes at least %d positional arguments but %d were given",
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self->n_args - self->n_def_args, n_args));
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}
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}
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}
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// check keyword arguments
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if (n_kw != 0) {
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// We cannot use dynamically-sized array here, because GCC indeed
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// deallocates it on leaving defining scope (unlike most static stack allocs).
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// So, we have 2 choices: allocate it unconditionally at the top of function
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// (wastes stack), or use alloca which is guaranteed to dealloc on func exit.
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//mp_obj_t flat_args[self->n_args];
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mp_obj_t *flat_args = alloca(self->n_args * sizeof(mp_obj_t));
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for (int i = self->n_args - 1; i >= 0; i--) {
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flat_args[i] = MP_OBJ_NULL;
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}
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memcpy(flat_args, args, sizeof(*args) * n_args);
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DEBUG_printf("Initial args: ");
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dump_args(flat_args, self->n_args);
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mp_obj_t dict = MP_OBJ_NULL;
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if (self->takes_kw_args) {
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dict = mp_obj_new_dict(n_kw); // TODO: better go conservative with 0?
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}
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for (uint i = 0; i < n_kw; i++) {
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qstr arg_name = MP_OBJ_QSTR_VALUE(kwargs[2 * i]);
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for (uint j = 0; j < self->n_args; j++) {
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if (arg_name == self->args[j]) {
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if (flat_args[j] != MP_OBJ_NULL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function got multiple values for argument '%s'", qstr_str(arg_name)));
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}
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flat_args[j] = kwargs[2 * i + 1];
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goto continue2;
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}
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}
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// Didn't find name match with positional args
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if (!self->takes_kw_args) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "function does not take keyword arguments"));
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}
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mp_obj_dict_store(dict, kwargs[2 * i], kwargs[2 * i + 1]);
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continue2:;
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}
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DEBUG_printf("Args with kws flattened: ");
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dump_args(flat_args, self->n_args);
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// Now fill in defaults
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mp_obj_t *d = &flat_args[self->n_args - 1];
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mp_obj_t *s = &self->extra_args[self->n_def_args - 1];
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for (int i = self->n_def_args; i > 0; i--, d--, s--) {
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if (*d == MP_OBJ_NULL) {
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*d = *s;
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}
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}
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DEBUG_printf("Args after filling defaults: ");
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dump_args(flat_args, self->n_args);
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// Now check that all mandatory args specified
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while (d >= flat_args) {
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if (*d-- == MP_OBJ_NULL) {
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nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"function missing required positional argument #%d", d - flat_args));
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}
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}
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args = flat_args;
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n_args = self->n_args;
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if (self->takes_kw_args) {
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extra_args[n_extra_args] = dict;
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n_extra_args += 1;
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}
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} else {
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// no keyword arguments given
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if (self->takes_kw_args) {
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extra_args[n_extra_args] = mp_obj_new_dict(0);
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n_extra_args += 1;
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}
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}
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mp_obj_dict_t *old_globals = mp_globals_get();
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mp_globals_set(self->globals);
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mp_obj_t result;
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DEBUG_printf("Calling: args=%p, n_args=%d, extra_args=%p, n_extra_args=%d\n", args, n_args, extra_args, n_extra_args);
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dump_args(args, n_args);
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dump_args(extra_args, n_extra_args);
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mp_vm_return_kind_t vm_return_kind = mp_execute_byte_code(self->bytecode, args, n_args, extra_args, n_extra_args, &result);
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mp_globals_set(old_globals);
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if (vm_return_kind == MP_VM_RETURN_NORMAL) {
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return result;
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} else { // MP_VM_RETURN_EXCEPTION
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nlr_raise(result);
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}
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}
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const mp_obj_type_t mp_type_fun_bc = {
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{ &mp_type_type },
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.name = MP_QSTR_function,
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.call = fun_bc_call,
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.binary_op = fun_binary_op,
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};
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mp_obj_t mp_obj_new_fun_bc(uint scope_flags, qstr *args, uint n_args, mp_obj_t def_args_in, const byte *code) {
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uint n_def_args = 0;
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uint n_extra_args = 0;
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mp_obj_tuple_t *def_args = def_args_in;
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if (def_args != MP_OBJ_NULL) {
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assert(MP_OBJ_IS_TYPE(def_args, &mp_type_tuple));
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n_def_args = def_args->len;
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n_extra_args = def_args->len;
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}
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if ((scope_flags & MP_SCOPE_FLAG_VARARGS) != 0) {
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n_extra_args += 1;
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}
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if ((scope_flags & MP_SCOPE_FLAG_VARKEYWORDS) != 0) {
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n_extra_args += 1;
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}
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mp_obj_fun_bc_t *o = m_new_obj_var(mp_obj_fun_bc_t, mp_obj_t, n_extra_args);
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o->base.type = &mp_type_fun_bc;
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o->globals = mp_globals_get();
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o->args = args;
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o->n_args = n_args;
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o->n_def_args = n_def_args;
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o->takes_var_args = (scope_flags & MP_SCOPE_FLAG_VARARGS) != 0;
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o->takes_kw_args = (scope_flags & MP_SCOPE_FLAG_VARKEYWORDS) != 0;
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o->bytecode = code;
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if (def_args != MP_OBJ_NULL) {
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memcpy(o->extra_args, def_args->items, n_def_args * sizeof(mp_obj_t));
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}
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return o;
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}
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void mp_obj_fun_bc_get(mp_obj_t self_in, int *n_args, const byte **code) {
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assert(MP_OBJ_IS_TYPE(self_in, &mp_type_fun_bc));
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mp_obj_fun_bc_t *self = self_in;
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*n_args = self->n_args;
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*code = self->bytecode;
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}
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/******************************************************************************/
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/* inline assembler functions */
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typedef struct _mp_obj_fun_asm_t {
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mp_obj_base_t base;
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int n_args;
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void *fun;
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} mp_obj_fun_asm_t;
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typedef machine_uint_t (*inline_asm_fun_0_t)();
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typedef machine_uint_t (*inline_asm_fun_1_t)(machine_uint_t);
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typedef machine_uint_t (*inline_asm_fun_2_t)(machine_uint_t, machine_uint_t);
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typedef machine_uint_t (*inline_asm_fun_3_t)(machine_uint_t, machine_uint_t, machine_uint_t);
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// convert a Micro Python object to a sensible value for inline asm
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STATIC machine_uint_t convert_obj_for_inline_asm(mp_obj_t obj) {
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// TODO for byte_array, pass pointer to the array
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if (MP_OBJ_IS_SMALL_INT(obj)) {
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return MP_OBJ_SMALL_INT_VALUE(obj);
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} else if (obj == mp_const_none) {
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return 0;
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} else if (obj == mp_const_false) {
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return 0;
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} else if (obj == mp_const_true) {
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return 1;
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} else if (MP_OBJ_IS_STR(obj)) {
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// pointer to the string (it's probably constant though!)
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uint l;
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return (machine_uint_t)mp_obj_str_get_data(obj, &l);
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} else {
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mp_obj_type_t *type = mp_obj_get_type(obj);
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if (0) {
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#if MICROPY_ENABLE_FLOAT
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} else if (type == &mp_type_float) {
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// convert float to int (could also pass in float registers)
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return (machine_int_t)mp_obj_float_get(obj);
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#endif
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} else if (type == &mp_type_tuple) {
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// pointer to start of tuple (could pass length, but then could use len(x) for that)
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uint len;
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mp_obj_t *items;
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mp_obj_tuple_get(obj, &len, &items);
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return (machine_uint_t)items;
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} else if (type == &mp_type_list) {
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// pointer to start of list (could pass length, but then could use len(x) for that)
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uint len;
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mp_obj_t *items;
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mp_obj_list_get(obj, &len, &items);
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return (machine_uint_t)items;
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} else {
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buffer_info_t bufinfo;
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if (mp_get_buffer(obj, &bufinfo)) {
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|
// supports the buffer protocol, return a pointer to the data
|
|
return (machine_uint_t)bufinfo.buf;
|
|
} else {
|
|
// just pass along a pointer to the object
|
|
return (machine_uint_t)obj;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// convert a return value from inline asm to a sensible Micro Python object
|
|
STATIC mp_obj_t convert_val_from_inline_asm(machine_uint_t val) {
|
|
return MP_OBJ_NEW_SMALL_INT(val);
|
|
}
|
|
|
|
STATIC mp_obj_t fun_asm_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
|
mp_obj_fun_asm_t *self = self_in;
|
|
|
|
if (n_args != self->n_args) {
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "function takes %d positional arguments but %d were given", self->n_args, n_args));
|
|
}
|
|
if (n_kw != 0) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "function does not take keyword arguments"));
|
|
}
|
|
|
|
machine_uint_t ret;
|
|
if (n_args == 0) {
|
|
ret = ((inline_asm_fun_0_t)self->fun)();
|
|
} else if (n_args == 1) {
|
|
ret = ((inline_asm_fun_1_t)self->fun)(convert_obj_for_inline_asm(args[0]));
|
|
} else if (n_args == 2) {
|
|
ret = ((inline_asm_fun_2_t)self->fun)(convert_obj_for_inline_asm(args[0]), convert_obj_for_inline_asm(args[1]));
|
|
} else if (n_args == 3) {
|
|
ret = ((inline_asm_fun_3_t)self->fun)(convert_obj_for_inline_asm(args[0]), convert_obj_for_inline_asm(args[1]), convert_obj_for_inline_asm(args[2]));
|
|
} else {
|
|
assert(0);
|
|
ret = 0;
|
|
}
|
|
|
|
return convert_val_from_inline_asm(ret);
|
|
}
|
|
|
|
STATIC const mp_obj_type_t mp_type_fun_asm = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_function,
|
|
.call = fun_asm_call,
|
|
.binary_op = fun_binary_op,
|
|
};
|
|
|
|
mp_obj_t mp_obj_new_fun_asm(uint n_args, void *fun) {
|
|
mp_obj_fun_asm_t *o = m_new_obj(mp_obj_fun_asm_t);
|
|
o->base.type = &mp_type_fun_asm;
|
|
o->n_args = n_args;
|
|
o->fun = fun;
|
|
return o;
|
|
}
|