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stmhal: Reimplement file support using stream protocol API. 

This adds readline(), readall(), etc. methods. Also other fixes to make
Python API compliant and "with" support.
travis
Paul Sokolovsky 2014-04-03 20:32:54 +03:00
parent 34e1199b3a
commit 1d4d9ddd9e
2 changed files with 46 additions and 26 deletions
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70
stmhal/file.c
View File

@ -4,6 +4,8 @@
#include "mpconfig.h"
#include "qstr.h"
#include "obj.h"
#include "runtime.h"
#include "stream.h"
#include "file.h"
#include "ff.h"
@ -16,27 +18,18 @@ void file_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, m
printf("<file %p>", self_in);
}
mp_obj_t file_obj_read(mp_obj_t self_in, mp_obj_t arg) {
STATIC machine_int_t file_read(mp_obj_t self_in, void *buf, machine_uint_t size, int *errcode) {
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);
UINT sz_out;
*errcode = f_read(&self->fp, buf, size, &sz_out);
return sz_out;
}
mp_obj_t file_obj_write(mp_obj_t self_in, mp_obj_t arg) {
STATIC machine_int_t file_write(mp_obj_t self_in, const void *buf, machine_uint_t size, int *errcode) {
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;
UINT sz_out;
*errcode = f_write(&self->fp, buf, size, &sz_out);
return sz_out;
}
mp_obj_t file_obj_close(mp_obj_t self_in) {
@ -45,30 +38,49 @@ mp_obj_t file_obj_close(mp_obj_t self_in) {
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);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(file_obj_close_obj, file_obj_close);
mp_obj_t file_obj___exit__(uint n_args, const mp_obj_t *args) {
return file_obj_close(args[0]);
}
static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(file_obj___exit___obj, 4, 4, file_obj___exit__);
// TODO gc hook to close the file if not already closed
STATIC const mp_map_elem_t file_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&file_obj_read_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&file_obj_write_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readall), (mp_obj_t)&mp_stream_readall_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},
{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&file_obj_close_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___enter__), (mp_obj_t)&mp_identity_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR___exit__), (mp_obj_t)&file_obj___exit___obj },
};
STATIC MP_DEFINE_CONST_DICT(file_locals_dict, file_locals_dict_table);
STATIC mp_obj_t file_obj_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args);
static const mp_obj_type_t file_obj_type = {
{ &mp_type_type },
.name = MP_QSTR_File,
.make_new = file_obj_make_new,
.print = file_obj_print,
.getiter = mp_identity,
.iternext = mp_stream_unbuffered_iter,
.stream_p = {
.read = file_read,
.write = file_write,
},
.locals_dict = (mp_obj_t)&file_locals_dict,
};
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);
STATIC mp_obj_t file_obj_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
mp_check_nargs(n_args, 1, 2, n_kw, false);
const char *filename = mp_obj_str_get_str(args[0]);
const char *mode = "r";
if (n_args > 1) {
mode = mp_obj_str_get_str(args[1]);
}
pyb_file_obj_t *self = m_new_obj(pyb_file_obj_t);
self->base.type = &file_obj_type;
if (mode[0] == 'r') {
@ -92,4 +104,10 @@ STATIC mp_obj_t pyb_io_open(mp_obj_t o_filename, mp_obj_t o_mode) {
return self;
}
MP_DEFINE_CONST_FUN_OBJ_2(mp_builtin_open_obj, pyb_io_open);
// Factory function for I/O stream classes
STATIC mp_obj_t pyb_io_open(uint n_args, const mp_obj_t *args) {
// TODO: analyze mode and buffering args and instantiate appropriate type
return file_obj_make_new((mp_obj_t)&file_obj_type, n_args, 0, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_open_obj, 1, 2, pyb_io_open);

2
stmhal/qstrdefsport.h
View File

@ -21,6 +21,8 @@ Q(SW)
Q(servo)
Q(pwm)
Q(read)
Q(readall)
Q(readline)
Q(write)
Q(hid)
Q(time)