blob: 283159a69b42d3577a86f73195e50b7f6043607d [file] [log] [blame]
mux40048ad2014-01-24 17:14:13 +02001#include <stdio.h>
2#include <stm32f4xx.h>
3
4#include "misc.h"
5#include "mpconfig.h"
mux40048ad2014-01-24 17:14:13 +02006#include "qstr.h"
7#include "obj.h"
8#include "file.h"
9#include "ff.h"
10
11typedef struct _pyb_file_obj_t {
12 mp_obj_base_t base;
13 FIL fp;
14} pyb_file_obj_t;
15
16void file_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
17 printf("<file %p>", self_in);
18}
19
20mp_obj_t file_obj_read(mp_obj_t self_in, mp_obj_t arg) {
21 pyb_file_obj_t *self = self_in;
22 int n = mp_obj_get_int(arg);
23 byte *buf = m_new(byte, n);
24 UINT n_out;
25 f_read(&self->fp, buf, n, &n_out);
26 return mp_obj_new_str(buf, n_out, false);
27}
28
29mp_obj_t file_obj_write(mp_obj_t self_in, mp_obj_t arg) {
30 pyb_file_obj_t *self = self_in;
31 uint l;
Damien George698ec212014-02-08 18:17:23 +000032 const char *s = mp_obj_str_get_data(arg, &l);
mux40048ad2014-01-24 17:14:13 +020033 UINT n_out;
34 FRESULT res = f_write(&self->fp, s, l, &n_out);
35 if (res != FR_OK) {
36 printf("File error: could not write to file; error code %d\n", res);
37 } else if (n_out != l) {
38 printf("File error: could not write all data to file; wrote %d / %d bytes\n", n_out, l);
39 }
40 return mp_const_none;
41}
42
43mp_obj_t file_obj_close(mp_obj_t self_in) {
44 pyb_file_obj_t *self = self_in;
45 f_close(&self->fp);
46 return mp_const_none;
47}
48
49static MP_DEFINE_CONST_FUN_OBJ_2(file_obj_read_obj, file_obj_read);
50static MP_DEFINE_CONST_FUN_OBJ_2(file_obj_write_obj, file_obj_write);
51static MP_DEFINE_CONST_FUN_OBJ_1(file_obj_close_obj, file_obj_close);
52
53// TODO gc hook to close the file if not already closed
54
55static const mp_method_t file_methods[] = {
56 { "read", &file_obj_read_obj },
57 { "write", &file_obj_write_obj },
58 { "close", &file_obj_close_obj },
59 {NULL, NULL},
60};
61
62static const mp_obj_type_t file_obj_type = {
Damien Georgec5966122014-02-15 16:10:44 +000063 { &mp_type_type },
Damien Georgea71c83a2014-02-15 11:34:50 +000064 .name = MP_QSTR_File,
mux40048ad2014-01-24 17:14:13 +020065 .print = file_obj_print,
66 .methods = file_methods,
67};
68
69mp_obj_t pyb_io_open(mp_obj_t o_filename, mp_obj_t o_mode) {
70 const char *filename = mp_obj_str_get_str(o_filename);
71 const char *mode = mp_obj_str_get_str(o_mode);
72 pyb_file_obj_t *self = m_new_obj(pyb_file_obj_t);
73 self->base.type = &file_obj_type;
74 if (mode[0] == 'r') {
75 // open for reading
76 FRESULT res = f_open(&self->fp, filename, FA_READ);
77 if (res != FR_OK) {
78 printf("FileNotFoundError: [Errno 2] No such file or directory: '%s'\n", filename);
79 return mp_const_none;
80 }
81 } else if (mode[0] == 'w') {
82 // open for writing, truncate the file first
83 FRESULT res = f_open(&self->fp, filename, FA_WRITE | FA_CREATE_ALWAYS);
84 if (res != FR_OK) {
85 printf("?FileError: could not create file: '%s'\n", filename);
86 return mp_const_none;
87 }
88 } else {
89 printf("ValueError: invalid mode: '%s'\n", mode);
90 return mp_const_none;
91 }
92 return self;
93}