micropython/py/modio.c at parse-bytecode · MicroPerceptron/micropython · GitHub

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* This file is part of the MicroPython project, http://micropython.org/

* The MIT License (MIT)

* 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 <assert.h>

#include <string.h>

#include "py/runtime.h"

#include "py/builtin.h"

#include "py/stream.h"

#include "py/objstringio.h"

#include "py/frozenmod.h"

#if MICROPY_PY_IO

extern const mp_obj_type_t mp_type_fileio;

extern const mp_obj_type_t mp_type_textio;

#if MICROPY_PY_IO_BUFFEREDWRITER

typedef struct _mp_obj_bufwriter_t {

mp_obj_base_t base;

mp_obj_t stream;

size_t alloc;

size_t len;

byte buf[0];

} mp_obj_bufwriter_t;

STATIC mp_obj_t bufwriter_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {

mp_arg_check_num(n_args, n_kw, 2, 2, false);

size_t alloc = mp_obj_get_int(args[1]);

mp_obj_bufwriter_t *o = m_new_obj_var(mp_obj_bufwriter_t, byte, alloc);

o->base.type = type;

o->stream = args[0];

o->alloc = alloc;

o->len = 0;

return o;

}

STATIC mp_uint_t bufwriter_write(mp_obj_t self_in, const void *buf, mp_uint_t size, int *errcode) {

mp_obj_bufwriter_t *self = MP_OBJ_TO_PTR(self_in);

mp_uint_t org_size = size;

while (size > 0) {

mp_uint_t rem = self->alloc - self->len;

if (size < rem) {

memcpy(self->buf + self->len, buf, size);

self->len += size;

return org_size;

}

// Buffer flushing policy here is to flush entire buffer all the time.

// This allows e.g. to have a block device as backing storage and write

// entire block to it. memcpy below is not ideal and could be optimized

// in some cases. But the way it is now it at least ensures that buffer

// is word-aligned, to guard against obscure cases when it matters, e.g.

// https://github.com/micropython/micropython/issues/1863

memcpy(self->buf + self->len, buf, rem);

buf = (byte*)buf + rem;

size -= rem;

mp_uint_t out_sz = mp_stream_write_exactly(self->stream, self->buf, self->alloc, errcode);

if (*errcode != 0) {

return MP_STREAM_ERROR;

}

// TODO: try to recover from a case of non-blocking stream, e.g. move

// remaining chunk to the beginning of buffer.

assert(out_sz == self->alloc);

self->len = 0;

}

return org_size;

}

STATIC mp_obj_t bufwriter_flush(mp_obj_t self_in) {

mp_obj_bufwriter_t *self = MP_OBJ_TO_PTR(self_in);

if (self->len != 0) {

int err;

mp_uint_t out_sz = mp_stream_write_exactly(self->stream, self->buf, self->len, &err);

// TODO: try to recover from a case of non-blocking stream, e.g. move

// remaining chunk to the beginning of buffer.

assert(out_sz == self->len);

self->len = 0;

if (err != 0) {

mp_raise_OSError(err);

}

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(bufwriter_flush_obj, bufwriter_flush);

STATIC const mp_rom_map_elem_t bufwriter_locals_dict_table[] = {

{ MP_ROM_QSTR(MP_QSTR_write), MP_ROM_PTR(&mp_stream_write_obj) },

{ MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&bufwriter_flush_obj) },

};

STATIC MP_DEFINE_CONST_DICT(bufwriter_locals_dict, bufwriter_locals_dict_table);

STATIC const mp_stream_p_t bufwriter_stream_p = {

.write = bufwriter_write,

};

STATIC const mp_obj_type_t bufwriter_type = {

{ &mp_type_type },

.name = MP_QSTR_BufferedWriter,

.make_new = bufwriter_make_new,

.protocol = &bufwriter_stream_p,

.locals_dict = (mp_obj_dict_t*)&bufwriter_locals_dict,

};

#endif // MICROPY_PY_IO_BUFFEREDWRITER

#if MICROPY_MODULE_FROZEN_STR

STATIC mp_obj_t resource_stream(mp_obj_t package_in, mp_obj_t path_in) {

VSTR_FIXED(path_buf, MICROPY_ALLOC_PATH_MAX);

size_t len;

// As an extension to pkg_resources.resource_stream(), we support

// package parameter being None, the path_in is interpreted as a

// raw path.

if (package_in != mp_const_none) {

mp_obj_t args[5];

args[0] = package_in;

args[1] = mp_const_none; // TODO should be globals

args[2] = mp_const_none; // TODO should be locals

args[3] = mp_const_true; // Pass sentinel "non empty" value to force returning of leaf module

args[4] = MP_OBJ_NEW_SMALL_INT(0);

// TODO lookup __import__ and call that instead of going straight to builtin implementation

mp_obj_t pkg = mp_builtin___import__(5, args);

mp_obj_t dest[2];

mp_load_method_maybe(pkg, MP_QSTR___path__, dest);

if (dest[0] == MP_OBJ_NULL) {

mp_raise_TypeError(NULL);

}

const char *path = mp_obj_str_get_data(dest[0], &len);

vstr_add_strn(&path_buf, path, len);

vstr_add_byte(&path_buf, '/');

}

const char *path = mp_obj_str_get_data(path_in, &len);

vstr_add_strn(&path_buf, path, len);

len = path_buf.len;

const char *data = mp_find_frozen_str(path_buf.buf, &len);

if (data != NULL) {

mp_obj_stringio_t *o = m_new_obj(mp_obj_stringio_t);

o->base.type = &mp_type_bytesio;

o->vstr = m_new_obj(vstr_t);

vstr_init_fixed_buf(o->vstr, len + 1, (char*)data);

o->vstr->len = len;

o->pos = 0;

return MP_OBJ_FROM_PTR(o);

}

mp_obj_t path_out = mp_obj_new_str(path_buf.buf, path_buf.len, false);

return mp_builtin_open(1, &path_out, (mp_map_t*)&mp_const_empty_map);

}

MP_DEFINE_CONST_FUN_OBJ_2(resource_stream_obj, resource_stream);

#endif

STATIC const mp_rom_map_elem_t mp_module_io_globals_table[] = {

{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uio) },

// Note: mp_builtin_open_obj should be defined by port, it's not

// part of the core.

{ MP_ROM_QSTR(MP_QSTR_open), MP_ROM_PTR(&mp_builtin_open_obj) },

#if MICROPY_PY_IO_RESOURCE_STREAM

{ MP_ROM_QSTR(MP_QSTR_resource_stream), MP_ROM_PTR(&resource_stream_obj) },

#endif

#if MICROPY_PY_IO_FILEIO

{ MP_ROM_QSTR(MP_QSTR_FileIO), MP_ROM_PTR(&mp_type_fileio) },

#if MICROPY_CPYTHON_COMPAT

{ MP_ROM_QSTR(MP_QSTR_TextIOWrapper), MP_ROM_PTR(&mp_type_textio) },

#endif

{ MP_ROM_QSTR(MP_QSTR_StringIO), MP_ROM_PTR(&mp_type_stringio) },

#if MICROPY_PY_IO_BYTESIO

{ MP_ROM_QSTR(MP_QSTR_BytesIO), MP_ROM_PTR(&mp_type_bytesio) },

#endif

#if MICROPY_PY_IO_BUFFEREDWRITER

{ MP_ROM_QSTR(MP_QSTR_BufferedWriter), MP_ROM_PTR(&bufwriter_type) },

#endif

};

STATIC MP_DEFINE_CONST_DICT(mp_module_io_globals, mp_module_io_globals_table);

const mp_obj_module_t mp_module_io = {

.base = { &mp_type_module },

.globals = (mp_obj_dict_t*)&mp_module_io_globals,

};

#endif

micropython/py/modio.c at parse-bytecode · MicroPerceptron/micropython · GitHub

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