95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
#include <stdio.h>
|
|
#include <stm32f4xx.h>
|
|
|
|
#include "misc.h"
|
|
#include "mpconfig.h"
|
|
#include "mpconfigport.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 byte *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_const_type },
|
|
"File",
|
|
.print = file_obj_print,
|
|
.methods = file_methods,
|
|
};
|
|
|
|
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;
|
|
}
|