118 lines
4.0 KiB
C
118 lines
4.0 KiB
C
#include <stdio.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 "runtime.h"
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#include "stream.h"
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#include "file.h"
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#include "ff.h"
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typedef struct _pyb_file_obj_t {
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mp_obj_base_t base;
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FIL fp;
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} pyb_file_obj_t;
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void file_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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printf("<io.FileIO %p>", self_in);
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}
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STATIC machine_int_t file_read(mp_obj_t self_in, void *buf, machine_uint_t size, int *errcode) {
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pyb_file_obj_t *self = self_in;
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UINT sz_out;
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*errcode = f_read(&self->fp, buf, size, &sz_out);
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return sz_out;
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}
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STATIC machine_int_t file_write(mp_obj_t self_in, const void *buf, machine_uint_t size, int *errcode) {
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pyb_file_obj_t *self = self_in;
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UINT sz_out;
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*errcode = f_write(&self->fp, buf, size, &sz_out);
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return sz_out;
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}
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mp_obj_t file_obj_close(mp_obj_t self_in) {
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pyb_file_obj_t *self = self_in;
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f_close(&self->fp);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(file_obj_close_obj, file_obj_close);
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mp_obj_t file_obj___exit__(uint n_args, const mp_obj_t *args) {
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return file_obj_close(args[0]);
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}
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static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(file_obj___exit___obj, 4, 4, file_obj___exit__);
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// TODO gc hook to close the file if not already closed
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STATIC const mp_map_elem_t file_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_readall), (mp_obj_t)&mp_stream_readall_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
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{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&file_obj_close_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR___del__), (mp_obj_t)&file_obj_close_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR___enter__), (mp_obj_t)&mp_identity_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR___exit__), (mp_obj_t)&file_obj___exit___obj },
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};
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STATIC MP_DEFINE_CONST_DICT(file_locals_dict, file_locals_dict_table);
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STATIC mp_obj_t file_obj_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args);
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STATIC const mp_stream_p_t file_obj_stream_p = {
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.read = file_read,
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.write = file_write,
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};
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STATIC const mp_obj_type_t file_obj_type = {
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{ &mp_type_type },
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.name = MP_QSTR_FileIO,
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.make_new = file_obj_make_new,
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.print = file_obj_print,
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.getiter = mp_identity,
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.iternext = mp_stream_unbuffered_iter,
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.stream_p = &file_obj_stream_p,
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.locals_dict = (mp_obj_t)&file_locals_dict,
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};
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STATIC mp_obj_t file_obj_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
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mp_check_nargs(n_args, 1, 2, n_kw, false);
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const char *filename = mp_obj_str_get_str(args[0]);
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const char *mode = "r";
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if (n_args > 1) {
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mode = mp_obj_str_get_str(args[1]);
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}
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pyb_file_obj_t *self = m_new_obj_with_finaliser(pyb_file_obj_t);
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self->base.type = &file_obj_type;
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if (mode[0] == 'r') {
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// open for reading
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FRESULT res = f_open(&self->fp, filename, FA_READ);
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if (res != FR_OK) {
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printf("FileNotFoundError: [Errno 2] No such file or directory: '%s'\n", filename);
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return mp_const_none;
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}
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} else if (mode[0] == 'w') {
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// open for writing, truncate the file first
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FRESULT res = f_open(&self->fp, filename, FA_WRITE | FA_CREATE_ALWAYS);
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if (res != FR_OK) {
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printf("?FileError: could not create file: '%s'\n", filename);
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return mp_const_none;
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}
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} else {
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printf("ValueError: invalid mode: '%s'\n", mode);
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return mp_const_none;
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}
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return self;
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}
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// Factory function for I/O stream classes
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STATIC mp_obj_t pyb_io_open(uint n_args, const mp_obj_t *args) {
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// TODO: analyze mode and buffering args and instantiate appropriate type
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return file_obj_make_new((mp_obj_t)&file_obj_type, n_args, 0, args);
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}
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MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_open_obj, 1, 2, pyb_io_open);
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