145 lines
4.3 KiB
C
145 lines
4.3 KiB
C
#include <string.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "nlr.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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typedef struct _mp_obj_namedtuple_type_t {
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mp_obj_type_t base;
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const char *fields;
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} mp_obj_namedtuple_type_t;
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typedef struct _mp_obj_namedtuple_t {
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mp_obj_tuple_t tuple;
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} mp_obj_namedtuple_t;
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static inline bool is_end_tok(char c) {
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return c == ' ' || c == ',';
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}
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static inline const char *skip_to_next(const char *p) {
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while (!is_end_tok(*p)) {
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if (*p == 0) {
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return NULL;
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}
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p++;
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}
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while (is_end_tok(*p)) {
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if (*p == 0) {
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return NULL;
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}
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p++;
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}
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return p;
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}
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STATIC uint namedtuple_count_fields(const char *namedef) {
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uint cnt = 0;
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while (*namedef != 0) {
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cnt++;
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while (!is_end_tok(*namedef) && *namedef != 0) {
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namedef++;
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}
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while (is_end_tok(*namedef) && *namedef != 0) {
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namedef++;
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}
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}
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return cnt;
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}
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STATIC int namedtuple_find_field(const char *name, const char *namedef) {
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int id = 0;
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int len = strlen(name);
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while (namedef) {
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if (memcmp(name, namedef, len) == 0) {
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namedef += len;
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if (*namedef == 0 || is_end_tok(*namedef)) {
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return id;
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}
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}
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namedef = skip_to_next(namedef);
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id++;
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}
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return -1;
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}
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STATIC void namedtuple_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t o_in, mp_print_kind_t kind) {
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mp_obj_namedtuple_t *o = o_in;
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print(env, "%s(", qstr_str(o->tuple.base.type->name));
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const char *fields = ((mp_obj_namedtuple_type_t*)o->tuple.base.type)->fields;
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for (int i = 0; i < o->tuple.len; i++) {
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if (i > 0) {
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print(env, ", ");
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}
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const char *next = fields;
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while (!is_end_tok(*next) && *next != 0) {
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next++;
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}
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print(env, "%.*s=", next - fields, fields);
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mp_obj_print_helper(print, env, o->tuple.items[i], PRINT_REPR);
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while (is_end_tok(*next) && *next != 0) {
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next++;
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}
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fields = next;
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}
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print(env, ")");
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}
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STATIC void namedtuple_load_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
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mp_obj_namedtuple_t *self = self_in;
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const char *fields = ((mp_obj_namedtuple_type_t*)self->tuple.base.type)->fields;
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int id = namedtuple_find_field(qstr_str(attr), fields);
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if (id < 0) {
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return;
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}
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dest[0] = self->tuple.items[id];
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}
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STATIC bool namedtuple_store_attr(mp_obj_t self_in, qstr attr, mp_obj_t value) {
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nlr_jump(mp_obj_new_exception_msg(&mp_type_AttributeError, "can't set attribute"));
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}
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STATIC mp_obj_t namedtuple_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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mp_obj_namedtuple_type_t *type = type_in;
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uint num_fields = namedtuple_count_fields(type->fields);
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if (n_args != num_fields) {
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// Counts include implicit "self"
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nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
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"__new__() takes %d positional arguments but %d were given",
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num_fields + 1, n_args + 1));
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}
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mp_obj_tuple_t *tuple = mp_obj_new_tuple(n_args, args);
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tuple->base.type = type_in;
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return tuple;
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}
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STATIC const mp_obj_tuple_t namedtuple_base_tuple = {{&mp_type_tuple}, 1, {(mp_obj_t)&mp_type_tuple}};
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mp_obj_t mp_obj_new_namedtuple_type(qstr name, const char *fields) {
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mp_obj_namedtuple_type_t *o = m_new0(mp_obj_namedtuple_type_t, 1);
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o->base.base.type = &mp_type_type;
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o->base.name = name;
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o->base.print = namedtuple_print;
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o->base.make_new = namedtuple_make_new;
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o->base.unary_op = tuple_unary_op;
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o->base.binary_op = tuple_binary_op;
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o->base.load_attr = namedtuple_load_attr;
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o->base.store_attr = namedtuple_store_attr;
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o->base.bases_tuple = (mp_obj_t)&namedtuple_base_tuple;
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o->fields = fields;
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return o;
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}
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STATIC mp_obj_t new_namedtuple_type(mp_obj_t name_in, mp_obj_t fields_in) {
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qstr name = MP_OBJ_QSTR_VALUE(name_in);
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const char *fields = mp_obj_str_get_str(fields_in);
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return mp_obj_new_namedtuple_type(name, fields);
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}
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MP_DEFINE_CONST_FUN_OBJ_2(mp_namedtuple_obj, new_namedtuple_type);
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