273 lines
9.0 KiB
C
273 lines
9.0 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include "py/nlr.h"
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#include "py/runtime.h"
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#include "py/stream.h"
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#include "py/builtin.h"
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#if MICROPY_PY_IO
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#ifdef _WIN32
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#define fsync _commit
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#endif
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typedef struct _mp_obj_fdfile_t {
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mp_obj_base_t base;
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int fd;
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} mp_obj_fdfile_t;
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#ifdef MICROPY_CPYTHON_COMPAT
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STATIC void check_fd_is_open(const mp_obj_fdfile_t *o) {
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if (o->fd < 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "I/O operation on closed file"));
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}
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}
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#else
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#define check_fd_is_open(o)
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#endif
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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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STATIC void fdfile_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
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(void)kind;
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mp_obj_fdfile_t *self = self_in;
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mp_printf(print, "<io.%s %d>", mp_obj_get_type_str(self), self->fd);
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}
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STATIC mp_uint_t fdfile_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
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mp_obj_fdfile_t *o = o_in;
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check_fd_is_open(o);
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mp_int_t r = read(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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return MP_STREAM_ERROR;
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}
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return r;
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}
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STATIC mp_uint_t fdfile_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
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mp_obj_fdfile_t *o = o_in;
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check_fd_is_open(o);
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mp_int_t r = write(o->fd, buf, size);
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if (r == -1) {
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*errcode = errno;
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return MP_STREAM_ERROR;
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}
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return r;
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}
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STATIC mp_uint_t fdfile_ioctl(mp_obj_t o_in, mp_uint_t request, mp_uint_t arg, int *errcode) {
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mp_obj_fdfile_t *o = o_in;
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if (request == MP_STREAM_SEEK) {
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struct mp_stream_seek_t *s = (struct mp_stream_seek_t*)arg;
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off_t off = lseek(o->fd, s->offset, s->whence);
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if (off == (off_t)-1) {
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*errcode = errno;
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return MP_STREAM_ERROR;
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}
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s->offset = off;
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return 0;
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} else {
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*errcode = EINVAL;
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return MP_STREAM_ERROR;
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}
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}
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STATIC mp_obj_t fdfile_flush(mp_obj_t self_in) {
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mp_obj_fdfile_t *self = self_in;
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check_fd_is_open(self);
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fsync(self->fd);
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(fdfile_flush_obj, fdfile_flush);
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STATIC mp_obj_t fdfile_close(mp_obj_t self_in) {
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mp_obj_fdfile_t *self = self_in;
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close(self->fd);
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#ifdef MICROPY_CPYTHON_COMPAT
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self->fd = -1;
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#endif
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(fdfile_close_obj, fdfile_close);
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STATIC mp_obj_t fdfile___exit__(mp_uint_t n_args, const mp_obj_t *args) {
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(void)n_args;
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return fdfile_close(args[0]);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(fdfile___exit___obj, 4, 4, fdfile___exit__);
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STATIC mp_obj_t fdfile_fileno(mp_obj_t self_in) {
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mp_obj_fdfile_t *self = self_in;
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check_fd_is_open(self);
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return MP_OBJ_NEW_SMALL_INT(self->fd);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(fdfile_fileno_obj, fdfile_fileno);
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// Note: encoding is ignored for now; it's also not a valid kwarg for CPython's FileIO,
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// but by adding it here we can use one single mp_arg_t array for open() and FileIO's constructor
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STATIC const mp_arg_t file_open_args[] = {
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{ MP_QSTR_file, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_obj = mp_const_none} },
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{ MP_QSTR_mode, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_QSTR(MP_QSTR_r)} },
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{ MP_QSTR_encoding, MP_ARG_OBJ | MP_ARG_KW_ONLY, {.u_obj = mp_const_none} },
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};
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#define FILE_OPEN_NUM_ARGS MP_ARRAY_SIZE(file_open_args)
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STATIC mp_obj_t fdfile_open(mp_obj_t type_in, mp_arg_val_t *args) {
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mp_obj_fdfile_t *o = m_new_obj(mp_obj_fdfile_t);
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mp_const_obj_t type = type_in;
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const char *mode_s = mp_obj_str_get_str(args[1].u_obj);
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int mode = 0;
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while (*mode_s) {
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switch (*mode_s++) {
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// Note: these assume O_RDWR = O_RDONLY | O_WRONLY
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case 'r':
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mode |= O_RDONLY;
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break;
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case 'w':
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mode |= O_WRONLY | O_CREAT | O_TRUNC;
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break;
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case 'a':
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mode |= O_APPEND;
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break;
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case '+':
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mode |= O_RDWR;
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break;
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#if MICROPY_PY_IO_FILEIO
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// If we don't have io.FileIO, then files are in text mode implicitly
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case 'b':
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type = &mp_type_fileio;
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break;
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case 't':
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type = &mp_type_textio;
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break;
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#endif
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}
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}
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o->base.type = type;
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mp_obj_t fid = args[0].u_obj;
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if (MP_OBJ_IS_SMALL_INT(fid)) {
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o->fd = MP_OBJ_SMALL_INT_VALUE(fid);
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return o;
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}
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const char *fname = mp_obj_str_get_str(fid);
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int fd = open(fname, mode, 0644);
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if (fd == -1) {
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nlr_raise(mp_obj_new_exception_arg1(&mp_type_OSError, MP_OBJ_NEW_SMALL_INT(errno)));
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}
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o->fd = fd;
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return o;
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}
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STATIC mp_obj_t fdfile_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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mp_arg_val_t arg_vals[FILE_OPEN_NUM_ARGS];
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mp_arg_parse_all_kw_array(n_args, n_kw, args, FILE_OPEN_NUM_ARGS, file_open_args, arg_vals);
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return fdfile_open(type_in, arg_vals);
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}
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STATIC const mp_map_elem_t rawfile_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_fileno), (mp_obj_t)&fdfile_fileno_obj },
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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_readinto), (mp_obj_t)&mp_stream_readinto_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_seek), (mp_obj_t)&mp_stream_seek_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_flush), (mp_obj_t)&fdfile_flush_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&fdfile_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)&fdfile___exit___obj },
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};
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STATIC MP_DEFINE_CONST_DICT(rawfile_locals_dict, rawfile_locals_dict_table);
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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 = fdfile_read,
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.write = fdfile_write,
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.ioctl = fdfile_ioctl,
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};
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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 = fdfile_print,
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.make_new = fdfile_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 = fdfile_read,
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.write = fdfile_write,
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.ioctl = fdfile_ioctl,
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.is_text = true,
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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_TextIOWrapper,
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.print = fdfile_print,
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.make_new = fdfile_make_new,
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.getiter = mp_identity,
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.iternext = mp_stream_unbuffered_iter,
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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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// Factory function for I/O stream classes
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mp_obj_t mp_builtin_open(mp_uint_t n_args, const mp_obj_t *args, mp_map_t *kwargs) {
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// TODO: analyze buffering args and instantiate appropriate type
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mp_arg_val_t arg_vals[FILE_OPEN_NUM_ARGS];
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mp_arg_parse_all(n_args, args, kwargs, FILE_OPEN_NUM_ARGS, file_open_args, arg_vals);
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return fdfile_open((mp_obj_t)&mp_type_textio, arg_vals);
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}
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MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);
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const mp_obj_fdfile_t mp_sys_stdin_obj = { .base = {&mp_type_textio}, .fd = STDIN_FILENO };
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const mp_obj_fdfile_t mp_sys_stdout_obj = { .base = {&mp_type_textio}, .fd = STDOUT_FILENO };
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const mp_obj_fdfile_t mp_sys_stderr_obj = { .base = {&mp_type_textio}, .fd = STDERR_FILENO };
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#endif // MICROPY_PY_IO
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