kopia lustrzana https://github.com/micropython/micropython
py: Add arg checking helper functions.
These are to assist in writing native C functions that take positional and keyword arguments. mp_arg_check_num is for just checking the number of arguments is correct. mp_arg_parse_all is for parsing positional and keyword arguments with default values.pull/512/head
Damien George
rodzic
27dd471098
commit
a3f94e0030
|
|
@ -0,0 +1,78 @@
|
|||
#include <stdlib.h>
|
||||
#include <assert.h>
|
||||
|
||||
#include "nlr.h"
|
||||
#include "misc.h"
|
||||
#include "mpconfig.h"
|
||||
#include "qstr.h"
|
||||
#include "obj.h"
|
||||
#include "runtime.h"
|
||||
|
||||
void mp_arg_check_num(uint n_args, uint n_kw, uint n_args_min, uint n_args_max, bool takes_kw) {
|
||||
// TODO maybe take the function name as an argument so we can print nicer error messages
|
||||
|
||||
if (n_kw && !takes_kw) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "function does not take keyword arguments"));
|
||||
}
|
||||
|
||||
if (n_args_min == n_args_max) {
|
||||
if (n_args != n_args_min) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
|
||||
"function takes %d positional arguments but %d were given",
|
||||
n_args_min, n_args));
|
||||
}
|
||||
} else {
|
||||
if (n_args < n_args_min) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
|
||||
"function missing %d required positional arguments",
|
||||
n_args_min - n_args));
|
||||
} else if (n_args > n_args_max) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
|
||||
"function expected at most %d arguments, got %d",
|
||||
n_args_max, n_args));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
void mp_arg_parse_all(uint n_pos, const mp_obj_t *pos, mp_map_t *kws, uint n_allowed, const mp_arg_parse_t *allowed, mp_arg_parse_val_t *out_vals) {
|
||||
uint pos_found = 0, kws_found = 0;
|
||||
for (uint i = 0; i < n_allowed; i++) {
|
||||
mp_obj_t given_arg;
|
||||
if (i < n_pos) {
|
||||
if (allowed[i].flags & MP_ARG_PARSE_KW_ONLY) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' argument must be given by a keyword", qstr_str(allowed[i].qstr)));
|
||||
}
|
||||
pos_found++;
|
||||
given_arg = pos[i];
|
||||
} else {
|
||||
mp_map_elem_t *kw = mp_map_lookup(kws, MP_OBJ_NEW_QSTR(allowed[i].qstr), MP_MAP_LOOKUP);
|
||||
if (kw == NULL) {
|
||||
if (allowed[i].flags & MP_ARG_PARSE_REQUIRED) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "'%s' argument required", qstr_str(allowed[i].qstr)));
|
||||
}
|
||||
out_vals[i] = allowed[i].defval;
|
||||
continue;
|
||||
} else {
|
||||
kws_found++;
|
||||
given_arg = kw->value;
|
||||
}
|
||||
}
|
||||
if (allowed[i].flags == MP_ARG_PARSE_BOOL) {
|
||||
out_vals[i].u_bool = mp_obj_is_true(given_arg);
|
||||
} else if (allowed[i].flags == MP_ARG_PARSE_INT) {
|
||||
out_vals[i].u_int = mp_obj_get_int(given_arg);
|
||||
} else if (allowed[i].flags == MP_ARG_PARSE_OBJ) {
|
||||
out_vals[i].u_obj = given_arg;
|
||||
} else {
|
||||
assert(0);
|
||||
}
|
||||
}
|
||||
if (pos_found < n_pos) {
|
||||
// TODO better error message
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "extra positional arguments given"));
|
||||
}
|
||||
if (kws_found < kws->used) {
|
||||
// TODO better error message
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "extra keyword arguments given"));
|
||||
}
|
||||
}
|
||||
|
|
@ -75,7 +75,7 @@ STATIC mp_obj_t array_construct(char typecode, mp_obj_t initializer) {
|
|||
}
|
||||
|
||||
STATIC mp_obj_t array_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
||||
mp_check_nargs(n_args, 1, 2, n_kw, false);
|
||||
mp_arg_check_num(n_args, n_kw, 1, 2, false);
|
||||
|
||||
// get typecode
|
||||
uint l;
|
||||
|
|
@ -91,7 +91,7 @@ STATIC mp_obj_t array_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const m
|
|||
}
|
||||
|
||||
STATIC mp_obj_t bytearray_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
||||
mp_check_nargs(n_args, 0, 1, n_kw, false);
|
||||
mp_arg_check_num(n_args, n_kw, 0, 1, false);
|
||||
|
||||
if (n_args == 0) {
|
||||
// no args: construct an empty bytearray
|
||||
|
|
|
|||
32
py/objfun.c
32
py/objfun.c
|
|
@ -25,36 +25,6 @@
|
|||
|
||||
// mp_obj_fun_native_t defined in obj.h
|
||||
|
||||
STATIC void check_nargs(mp_obj_fun_native_t *self, int n_args, int n_kw) {
|
||||
mp_check_nargs(n_args, self->n_args_min, self->n_args_max, n_kw, self->is_kw);
|
||||
}
|
||||
|
||||
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) {
|
||||
// TODO maybe take the function name as an argument so we can print nicer error messages
|
||||
|
||||
if (n_kw && !is_kw) {
|
||||
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "function does not take keyword arguments"));
|
||||
}
|
||||
|
||||
if (n_args_min == n_args_max) {
|
||||
if (n_args != n_args_min) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
|
||||
"function takes %d positional arguments but %d were given",
|
||||
n_args_min, n_args));
|
||||
}
|
||||
} else {
|
||||
if (n_args < n_args_min) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
|
||||
"function missing %d required positional arguments",
|
||||
n_args_min - n_args));
|
||||
} else if (n_args > n_args_max) {
|
||||
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
|
||||
"function expected at most %d arguments, got %d",
|
||||
n_args_max, n_args));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
STATIC mp_obj_t fun_binary_op(int op, mp_obj_t lhs_in, mp_obj_t rhs_in) {
|
||||
switch (op) {
|
||||
case MP_BINARY_OP_EQUAL:
|
||||
|
|
@ -70,7 +40,7 @@ STATIC mp_obj_t fun_native_call(mp_obj_t self_in, uint n_args, uint n_kw, const
|
|||
mp_obj_fun_native_t *self = self_in;
|
||||
|
||||
// check number of arguments
|
||||
check_nargs(self, n_args, n_kw);
|
||||
mp_arg_check_num(n_args, n_kw, self->n_args_min, self->n_args_max, self->is_kw);
|
||||
|
||||
if (self->is_kw) {
|
||||
// function allows keywords
|
||||
|
|
|
|||
|
|
@ -57,7 +57,7 @@ typedef struct _mp_obj_range_t {
|
|||
} mp_obj_range_t;
|
||||
|
||||
STATIC mp_obj_t range_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
|
||||
mp_check_nargs(n_args, 1, 3, n_kw, false);
|
||||
mp_arg_check_num(n_args, n_kw, 1, 3, false);
|
||||
|
||||
mp_obj_range_t *o = m_new_obj(mp_obj_range_t);
|
||||
o->base.type = &mp_type_range;
|
||||
|
|
|
|||
1
py/py.mk
1
py/py.mk
|
|
@ -40,6 +40,7 @@ PY_O_BASENAME = \
|
|||
parsenum.o \
|
||||
emitglue.o \
|
||||
runtime.o \
|
||||
argcheck.o \
|
||||
map.o \
|
||||
obj.o \
|
||||
objarray.o \
|
||||
|
|
|
|||
24
py/runtime.h
24
py/runtime.h
|
|
@ -4,10 +4,32 @@ typedef enum {
|
|||
MP_VM_RETURN_EXCEPTION,
|
||||
} mp_vm_return_kind_t;
|
||||
|
||||
typedef enum {
|
||||
MP_ARG_PARSE_BOOL = 0x001,
|
||||
MP_ARG_PARSE_INT = 0x002,
|
||||
MP_ARG_PARSE_OBJ = 0x003,
|
||||
MP_ARG_PARSE_KIND_MASK = 0x0ff,
|
||||
MP_ARG_PARSE_REQUIRED = 0x100,
|
||||
MP_ARG_PARSE_KW_ONLY = 0x200,
|
||||
} mp_arg_parse_flag_t;
|
||||
|
||||
typedef union _mp_arg_parse_val_t {
|
||||
bool u_bool;
|
||||
machine_int_t u_int;
|
||||
mp_obj_t u_obj;
|
||||
} mp_arg_parse_val_t;
|
||||
|
||||
typedef struct _mp_arg_parse_t {
|
||||
qstr qstr;
|
||||
machine_uint_t flags;
|
||||
mp_arg_parse_val_t defval;
|
||||
} mp_arg_parse_t;
|
||||
|
||||
void mp_init(void);
|
||||
void mp_deinit(void);
|
||||
|
||||
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);
|
||||
void mp_arg_check_num(uint n_args, uint n_kw, uint n_args_min, uint n_args_max, bool takes_kw);
|
||||
void mp_arg_parse_all(uint n_pos, const mp_obj_t *pos, mp_map_t *kws, uint n_allowed, const mp_arg_parse_t *allowed, mp_arg_parse_val_t *out_vals);
|
||||
|
||||
mp_obj_dict_t *mp_locals_get(void);
|
||||
void mp_locals_set(mp_obj_dict_t *d);
|
||||
|
|
|
|||
Ładowanie…
Reference in New Issue