kopia lustrzana https://github.com/micropython/micropython
stmhal, file: Implement a,x,+ open modes, seek and tell.
Also now returns correct POSIX errno when an IO operation fails. Addresses issues #516 and #676.pull/671/merge
Damien George
rodzic
58cbb4d661
commit
b7572ad11b
217
stmhal/file.c
217
stmhal/file.c
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@ -25,9 +25,11 @@
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*/
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#include <stdio.h>
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#include <errno.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "nlr.h"
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#include "misc.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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@ -35,6 +37,33 @@
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#include "file.h"
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#include "ff.h"
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extern const mp_obj_type_t mp_type_fileio;
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extern const mp_obj_type_t mp_type_textio;
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// this table converts from FRESULT to POSIX errno
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STATIC const byte fresult_to_errno_table[] = {
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[FR_OK] = 0,
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[FR_DISK_ERR] = EIO,
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[FR_INT_ERR] = EIO,
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[FR_NOT_READY] = EBUSY,
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[FR_NO_FILE] = ENOENT,
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[FR_NO_PATH] = ENOENT,
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[FR_INVALID_NAME] = EINVAL,
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[FR_DENIED] = EACCES,
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[FR_EXIST] = EEXIST,
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[FR_INVALID_OBJECT] = EINVAL,
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[FR_WRITE_PROTECTED] = EROFS,
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[FR_INVALID_DRIVE] = ENODEV,
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[FR_NOT_ENABLED] = ENODEV,
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[FR_NO_FILESYSTEM] = ENODEV,
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[FR_MKFS_ABORTED] = EIO,
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[FR_TIMEOUT] = EIO,
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[FR_LOCKED] = EIO,
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[FR_NOT_ENOUGH_CORE] = ENOMEM,
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[FR_TOO_MANY_OPEN_FILES] = EMFILE,
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[FR_INVALID_PARAMETER] = EINVAL,
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};
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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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@ -44,17 +73,25 @@ void file_obj_print(void (*print)(void *env, const char *fmt, ...), void *env, m
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printf("<io.%s %p>", mp_obj_get_type_str(self_in), 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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STATIC machine_int_t file_obj_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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FRESULT res = f_read(&self->fp, buf, size, &sz_out);
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if (res != FR_OK) {
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*errcode = fresult_to_errno_table[res];
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return -1;
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}
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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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STATIC machine_int_t file_obj_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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FRESULT res = f_write(&self->fp, buf, size, &sz_out);
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if (res != FR_OK) {
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*errcode = fresult_to_errno_table[res];
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return -1;
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}
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return sz_out;
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}
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@ -63,78 +100,164 @@ mp_obj_t file_obj_close(mp_obj_t 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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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(file_obj___exit___obj, 4, 4, file_obj___exit__);
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mp_obj_t file_obj_seek(uint n_args, const mp_obj_t *args) {
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pyb_file_obj_t *self = args[0];
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machine_int_t offset = mp_obj_get_int(args[1]);
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machine_int_t whence = 0;
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if (n_args == 3) {
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whence = mp_obj_get_int(args[2]);
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}
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switch (whence) {
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case 0: // SEEK_SET
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f_lseek(&self->fp, offset);
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break;
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case 1: // SEEK_CUR
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if (offset != 0) {
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goto error;
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}
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// no-operation
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break;
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case 2: // SEEK_END
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if (offset != 0) {
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goto error;
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}
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f_lseek(&self->fp, f_size(&self->fp));
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break;
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default:
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goto error;
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}
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return mp_obj_new_int_from_uint(f_tell(&self->fp));
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error:
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// A bad whence is a ValueError, while offset!=0 is an io.UnsupportedOperation.
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// But the latter inherits ValueError (as well as IOError), so we just raise ValueError.
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "invalid whence and/or offset"));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(file_obj_seek_obj, 2, 3, file_obj_seek);
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mp_obj_t file_obj_tell(mp_obj_t self_in) {
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pyb_file_obj_t *self = self_in;
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return mp_obj_new_int_from_uint(f_tell(&self->fp));
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(file_obj_tell_obj, file_obj_tell);
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STATIC mp_obj_t file_obj_make_new(mp_obj_t type, uint n_args, uint n_kw, const mp_obj_t *args) {
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mp_arg_check_num(n_args, n_kw, 1, 2, false);
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const char *fname = mp_obj_str_get_str(args[0]);
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int mode = 0;
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if (n_args == 1) {
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mode = FA_READ;
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} else {
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const char *mode_s = mp_obj_str_get_str(args[1]);
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// TODO make sure only one of r, w, x, a, and b, t are specified
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while (*mode_s) {
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switch (*mode_s++) {
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case 'r':
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mode |= FA_READ;
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break;
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case 'w':
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mode |= FA_WRITE | FA_CREATE_ALWAYS;
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break;
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case 'x':
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mode |= FA_WRITE | FA_CREATE_NEW;
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break;
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case 'a':
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mode |= FA_WRITE | FA_OPEN_ALWAYS;
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break;
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case '+':
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mode |= FA_READ | FA_WRITE;
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break;
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#if MICROPY_PY_IO_FILEIO
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case 'b':
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type = (mp_obj_t)&mp_type_fileio;
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break;
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#endif
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case 't':
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type = (mp_obj_t)&mp_type_textio;
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break;
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}
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}
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}
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pyb_file_obj_t *o = m_new_obj_with_finaliser(pyb_file_obj_t);
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o->base.type = type;
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FRESULT res = f_open(&o->fp, fname, mode);
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if (res != FR_OK) {
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m_del_obj(pyb_file_obj_t, o);
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT((machine_int_t)fresult_to_errno_table[res])));
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}
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return o;
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}
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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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STATIC const mp_map_elem_t rawfile_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_readlines), (mp_obj_t)&mp_stream_unbuffered_readlines_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_seek), (mp_obj_t)&file_obj_seek_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_tell), (mp_obj_t)&file_obj_tell_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_DEFINE_CONST_DICT(rawfile_locals_dict, rawfile_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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#if MICROPY_PY_IO_FILEIO
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STATIC const mp_stream_p_t fileio_stream_p = {
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.read = file_obj_read,
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.write = file_obj_write,
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.is_bytes = true,
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};
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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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const mp_obj_type_t mp_type_fileio = {
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{ &mp_type_type },
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.name = MP_QSTR_FileIO,
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.print = file_obj_print,
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.make_new = file_obj_make_new,
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.getiter = mp_identity,
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.iternext = mp_stream_unbuffered_iter,
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.stream_p = &fileio_stream_p,
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.locals_dict = (mp_obj_t)&rawfile_locals_dict,
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};
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#endif
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STATIC const mp_stream_p_t textio_stream_p = {
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.read = file_obj_read,
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.write = file_obj_write,
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};
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const mp_obj_type_t mp_type_textio = {
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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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.name = MP_QSTR_TextIOWrapper,
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.print = file_obj_print,
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.make_new = file_obj_make_new,
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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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.stream_p = &textio_stream_p,
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.locals_dict = (mp_obj_t)&rawfile_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_arg_check_num(n_args, n_kw, 1, 2, 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 = &mp_type_textio;
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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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@ -48,6 +48,8 @@
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#define MICROPY_PY_SYS_EXIT (1)
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#define MICROPY_PY_SYS_STDFILES (1)
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#define MICROPY_PY_CMATH (1)
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#define MICROPY_PY_IO (1)
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#define MICROPY_PY_IO_FILEIO (1)
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// extra built in names to add to the global namespace
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extern const struct _mp_obj_fun_native_t mp_builtin_help_obj;
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@ -66,6 +66,10 @@ Q(0:/)
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Q(0:/lib)
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Q(millis)
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// for file class
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Q(seek)
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Q(tell)
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// for RTC class
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Q(RTC)
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Q(info)
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