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#include <stdio.h>
#include "misc.h"
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "file.h"
#include "ff.h"
typedef struct _pyb_file_obj_t {
mp_obj_base_t base;
FIL fp;
} pyb_file_obj_t;
void file_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
printf("<file %p>", self_in);
}
mp_obj_t file_obj_read(mp_obj_t self_in, mp_obj_t arg) {
pyb_file_obj_t *self = self_in;
int n = mp_obj_get_int(arg);
byte *buf = m_new(byte, n);
UINT n_out;
f_read(&self->fp, buf, n, &n_out);
return mp_obj_new_str(buf, n_out, false);
}
mp_obj_t file_obj_write(mp_obj_t self_in, mp_obj_t arg) {
pyb_file_obj_t *self = self_in;
uint l;
const char *s = mp_obj_str_get_data(arg, &l);
UINT n_out;
FRESULT res = f_write(&self->fp, s, l, &n_out);
if (res != FR_OK) {
printf("File error: could not write to file; error code %d\n", res);
} else if (n_out != l) {
printf("File error: could not write all data to file; wrote %d / %d bytes\n", n_out, l);
}
return mp_const_none;
}
mp_obj_t file_obj_close(mp_obj_t self_in) {
pyb_file_obj_t *self = self_in;
f_close(&self->fp);
return mp_const_none;
}
static MP_DEFINE_CONST_FUN_OBJ_2(file_obj_read_obj, file_obj_read);
static MP_DEFINE_CONST_FUN_OBJ_2(file_obj_write_obj, file_obj_write);
static MP_DEFINE_CONST_FUN_OBJ_1(file_obj_close_obj, file_obj_close);
// TODO gc hook to close the file if not already closed
static const mp_method_t file_methods[] = {
{ "read", &file_obj_read_obj },
{ "write", &file_obj_write_obj },
{ "close", &file_obj_close_obj },
{NULL, NULL},
};
static const mp_obj_type_t file_obj_type = {
{ &mp_type_type },
.name = MP_QSTR_File,
.print = file_obj_print,
.methods = file_methods,
};
STATIC mp_obj_t pyb_io_open(mp_obj_t o_filename, mp_obj_t o_mode) {
const char *filename = mp_obj_str_get_str(o_filename);
const char *mode = mp_obj_str_get_str(o_mode);
pyb_file_obj_t *self = m_new_obj(pyb_file_obj_t);
self->base.type = &file_obj_type;
if (mode[0] == 'r') {
// open for reading
FRESULT res = f_open(&self->fp, filename, FA_READ);
if (res != FR_OK) {
printf("FileNotFoundError: [Errno 2] No such file or directory: '%s'\n", filename);
return mp_const_none;
}
} else if (mode[0] == 'w') {
// open for writing, truncate the file first
FRESULT res = f_open(&self->fp, filename, FA_WRITE | FA_CREATE_ALWAYS);
if (res != FR_OK) {
printf("?FileError: could not create file: '%s'\n", filename);
return mp_const_none;
}
} else {
printf("ValueError: invalid mode: '%s'\n", mode);
return mp_const_none;
}
return self;
}
MP_DEFINE_CONST_FUN_OBJ_2(mp_builtin_open_obj, pyb_io_open);
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