1 files changed, 175 insertions, 0 deletions
diff --git a/shared/runtime/sys_stdio_mphal.c b/shared/runtime/sys_stdio_mphal.c
new file mode 100644
index 0000000000..e72facb981
--- /dev/null
+++ b/shared/runtime/sys_stdio_mphal.c
@@ -0,0 +1,175 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013-2019 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include "py/obj.h"
+#include "py/stream.h"
+#include "py/mperrno.h"
+#include "py/mphal.h"
+
+// TODO make stdin, stdout and stderr writable objects so they can
+// be changed by Python code.  This requires some changes, as these
+// objects are in a read-only module (py/modsys.c).
+
+/******************************************************************************/
+// MicroPython bindings
+
+#define STDIO_FD_IN  (0)
+#define STDIO_FD_OUT (1)
+#define STDIO_FD_ERR (2)
+
+typedef struct _sys_stdio_obj_t {
+    mp_obj_base_t base;
+    int fd;
+} sys_stdio_obj_t;
+
+#if MICROPY_PY_SYS_STDIO_BUFFER
+STATIC const sys_stdio_obj_t stdio_buffer_obj;
+#endif
+
+void stdio_obj_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    sys_stdio_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    mp_printf(print, "<io.FileIO %d>", self->fd);
+}
+
+STATIC mp_uint_t stdio_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
+    sys_stdio_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    if (self->fd == STDIO_FD_IN) {
+        for (uint i = 0; i < size; i++) {
+            int c = mp_hal_stdin_rx_chr();
+            if (c == '\r') {
+                c = '\n';
+            }
+            ((byte *)buf)[i] = c;
+        }
+        return size;
+    } else {
+        *errcode = MP_EPERM;
+        return MP_STREAM_ERROR;
+    }
+}
+
+STATIC mp_uint_t stdio_write(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
+    sys_stdio_obj_t *self = MP_OBJ_TO_PTR(self_in);
+    if (self->fd == STDIO_FD_OUT || self->fd == STDIO_FD_ERR) {
+        mp_hal_stdout_tx_strn_cooked(buf, size);
+        return size;
+    } else {
+        *errcode = MP_EPERM;
+        return MP_STREAM_ERROR;
+    }
+}
+
+STATIC mp_uint_t stdio_ioctl(mp_obj_t self_in, mp_uint_t request, uintptr_t arg, int *errcode) {
+    (void)self_in;
+    if (request == MP_STREAM_POLL) {
+        return mp_hal_stdio_poll(arg);
+    } else {
+        *errcode = MP_EINVAL;
+        return MP_STREAM_ERROR;
+    }
+}
+
+STATIC mp_obj_t stdio_obj___exit__(size_t n_args, const mp_obj_t *args) {
+    return mp_const_none;
+}
+STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(stdio_obj___exit___obj, 4, 4, stdio_obj___exit__);
+
+// TODO gc hook to close the file if not already closed
+
+STATIC const mp_rom_map_elem_t stdio_locals_dict_table[] = {
+    #if MICROPY_PY_SYS_STDIO_BUFFER
+    { MP_ROM_QSTR(MP_QSTR_buffer), MP_ROM_PTR(&stdio_buffer_obj) },
+    #endif
+    { MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
+    { MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
+    { MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj)},
+    { MP_ROM_QSTR(MP_QSTR_readlines), MP_ROM_PTR(&mp_stream_unbuffered_readlines_obj)},
+    { MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },
+    { MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&mp_identity_obj) },
+    { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&mp_identity_obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&stdio_obj___exit___obj) },
+};
+
+STATIC MP_DEFINE_CONST_DICT(stdio_locals_dict, stdio_locals_dict_table);
+
+STATIC const mp_stream_p_t stdio_obj_stream_p = {
+    .read = stdio_read,
+    .write = stdio_write,
+    .ioctl = stdio_ioctl,
+    .is_text = true,
+};
+
+STATIC const mp_obj_type_t stdio_obj_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_FileIO,
+    // TODO .make_new?
+    .print = stdio_obj_print,
+    .getiter = mp_identity_getiter,
+    .iternext = mp_stream_unbuffered_iter,
+    .protocol = &stdio_obj_stream_p,
+    .locals_dict = (mp_obj_dict_t *)&stdio_locals_dict,
+};
+
+const sys_stdio_obj_t mp_sys_stdin_obj = {{&stdio_obj_type}, .fd = STDIO_FD_IN};
+const sys_stdio_obj_t mp_sys_stdout_obj = {{&stdio_obj_type}, .fd = STDIO_FD_OUT};
+const sys_stdio_obj_t mp_sys_stderr_obj = {{&stdio_obj_type}, .fd = STDIO_FD_ERR};
+
+#if MICROPY_PY_SYS_STDIO_BUFFER
+STATIC mp_uint_t stdio_buffer_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
+    for (uint i = 0; i < size; i++) {
+        ((byte *)buf)[i] = mp_hal_stdin_rx_chr();
+    }
+    return size;
+}
+
+STATIC mp_uint_t stdio_buffer_write(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {
+    mp_hal_stdout_tx_strn(buf, size);
+    return size;
+}
+
+STATIC const mp_stream_p_t stdio_buffer_obj_stream_p = {
+    .read = stdio_buffer_read,
+    .write = stdio_buffer_write,
+    .ioctl = stdio_ioctl,
+    .is_text = false,
+};
+
+STATIC const mp_obj_type_t stdio_buffer_obj_type = {
+    { &mp_type_type },
+    .name = MP_QSTR_FileIO,
+    .print = stdio_obj_print,
+    .getiter = mp_identity_getiter,
+    .iternext = mp_stream_unbuffered_iter,
+    .protocol = &stdio_buffer_obj_stream_p,
+    .locals_dict = (mp_obj_dict_t *)&stdio_locals_dict,
+};
+
+STATIC const sys_stdio_obj_t stdio_buffer_obj = {{&stdio_buffer_obj_type}, .fd = 0}; // fd unused
+#endif