824f5c5a32
Now there is just one function to allocate a new vstr, namely vstr_new (in addition to vstr_init etc). The caller of this function should know what initial size to allocate for the buffer, or at least have some policy or config option, instead of leaving it to a default (as it was before).
225 lines
7.5 KiB
C
225 lines
7.5 KiB
C
/*
|
|
* This file is part of the Micro Python project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2013, 2014 Damien P. George
|
|
* Copyright (c) 2014 Paul Sokolovsky
|
|
*
|
|
* 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/nlr.h"
|
|
#include "py/objstr.h"
|
|
#include "py/objstringio.h"
|
|
#include "py/runtime.h"
|
|
#include "py/stream.h"
|
|
|
|
#if MICROPY_PY_IO
|
|
|
|
#if MICROPY_CPYTHON_COMPAT
|
|
STATIC void check_stringio_is_open(const mp_obj_stringio_t *o) {
|
|
if (o->vstr == NULL) {
|
|
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "I/O operation on closed file"));
|
|
}
|
|
}
|
|
#else
|
|
#define check_stringio_is_open(o)
|
|
#endif
|
|
|
|
STATIC void stringio_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
|
|
(void)kind;
|
|
mp_obj_stringio_t *self = MP_OBJ_TO_PTR(self_in);
|
|
mp_printf(print, self->base.type == &mp_type_stringio ? "<io.StringIO 0x%x>" : "<io.BytesIO 0x%x>", self);
|
|
}
|
|
|
|
STATIC mp_uint_t stringio_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
|
|
(void)errcode;
|
|
mp_obj_stringio_t *o = MP_OBJ_TO_PTR(o_in);
|
|
check_stringio_is_open(o);
|
|
mp_uint_t remaining = o->vstr->len - o->pos;
|
|
if (size > remaining) {
|
|
size = remaining;
|
|
}
|
|
memcpy(buf, o->vstr->buf + o->pos, size);
|
|
o->pos += size;
|
|
return size;
|
|
}
|
|
|
|
STATIC mp_uint_t stringio_write(mp_obj_t o_in, const void *buf, mp_uint_t size, int *errcode) {
|
|
(void)errcode;
|
|
mp_obj_stringio_t *o = MP_OBJ_TO_PTR(o_in);
|
|
check_stringio_is_open(o);
|
|
mp_int_t remaining = o->vstr->alloc - o->pos;
|
|
mp_uint_t org_len = o->vstr->len;
|
|
if ((mp_int_t)size > remaining) {
|
|
// Take all what's already allocated...
|
|
o->vstr->len = o->vstr->alloc;
|
|
// ... and add more
|
|
vstr_add_len(o->vstr, size - remaining);
|
|
}
|
|
// If there was a seek past EOF, clear the hole
|
|
if (o->pos > org_len) {
|
|
memset(o->vstr->buf + org_len, 0, o->pos - org_len);
|
|
}
|
|
memcpy(o->vstr->buf + o->pos, buf, size);
|
|
o->pos += size;
|
|
if (o->pos > o->vstr->len) {
|
|
o->vstr->len = o->pos;
|
|
}
|
|
return size;
|
|
}
|
|
|
|
STATIC mp_uint_t stringio_ioctl(mp_obj_t o_in, mp_uint_t request, uintptr_t arg, int *errcode) {
|
|
(void)errcode;
|
|
mp_obj_stringio_t *o = MP_OBJ_TO_PTR(o_in);
|
|
switch (request) {
|
|
case MP_STREAM_SEEK: {
|
|
struct mp_stream_seek_t *s = (struct mp_stream_seek_t*)arg;
|
|
mp_uint_t ref = 0;
|
|
switch (s->whence) {
|
|
case 1: // SEEK_CUR
|
|
ref = o->pos;
|
|
break;
|
|
case 2: // SEEK_END
|
|
ref = o->vstr->len;
|
|
break;
|
|
}
|
|
o->pos = ref + s->offset;
|
|
s->offset = o->pos;
|
|
return 0;
|
|
}
|
|
case MP_STREAM_FLUSH:
|
|
return 0;
|
|
default:
|
|
*errcode = MP_EINVAL;
|
|
return MP_STREAM_ERROR;
|
|
}
|
|
}
|
|
|
|
#define STREAM_TO_CONTENT_TYPE(o) (((o)->base.type == &mp_type_stringio) ? &mp_type_str : &mp_type_bytes)
|
|
|
|
STATIC mp_obj_t stringio_getvalue(mp_obj_t self_in) {
|
|
mp_obj_stringio_t *self = MP_OBJ_TO_PTR(self_in);
|
|
check_stringio_is_open(self);
|
|
// TODO: Try to avoid copying string
|
|
return mp_obj_new_str_of_type(STREAM_TO_CONTENT_TYPE(self), (byte*)self->vstr->buf, self->vstr->len);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(stringio_getvalue_obj, stringio_getvalue);
|
|
|
|
STATIC mp_obj_t stringio_close(mp_obj_t self_in) {
|
|
mp_obj_stringio_t *self = MP_OBJ_TO_PTR(self_in);
|
|
#if MICROPY_CPYTHON_COMPAT
|
|
vstr_free(self->vstr);
|
|
self->vstr = NULL;
|
|
#else
|
|
vstr_clear(self->vstr);
|
|
self->vstr->alloc = 0;
|
|
self->vstr->len = 0;
|
|
self->pos = 0;
|
|
#endif
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(stringio_close_obj, stringio_close);
|
|
|
|
STATIC mp_obj_t stringio___exit__(size_t n_args, const mp_obj_t *args) {
|
|
(void)n_args;
|
|
return stringio_close(args[0]);
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(stringio___exit___obj, 4, 4, stringio___exit__);
|
|
|
|
STATIC mp_obj_stringio_t *stringio_new(const mp_obj_type_t *type) {
|
|
mp_obj_stringio_t *o = m_new_obj(mp_obj_stringio_t);
|
|
o->base.type = type;
|
|
o->vstr = vstr_new(16);
|
|
o->pos = 0;
|
|
return o;
|
|
}
|
|
|
|
STATIC mp_obj_t stringio_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
|
|
(void)n_kw; // TODO check n_kw==0
|
|
mp_obj_stringio_t *o = stringio_new(type_in);
|
|
|
|
if (n_args > 0) {
|
|
mp_buffer_info_t bufinfo;
|
|
mp_get_buffer_raise(args[0], &bufinfo, MP_BUFFER_READ);
|
|
stringio_write(MP_OBJ_FROM_PTR(o), bufinfo.buf, bufinfo.len, NULL);
|
|
// Cur ptr is always at the beginning of buffer at the construction
|
|
o->pos = 0;
|
|
}
|
|
return MP_OBJ_FROM_PTR(o);
|
|
}
|
|
|
|
STATIC const mp_rom_map_elem_t stringio_locals_dict_table[] = {
|
|
{ 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_write), MP_ROM_PTR(&mp_stream_write_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_seek), MP_ROM_PTR(&mp_stream_seek_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_flush), MP_ROM_PTR(&mp_stream_flush_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_close), MP_ROM_PTR(&stringio_close_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR_getvalue), MP_ROM_PTR(&stringio_getvalue_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
|
|
{ MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&stringio___exit___obj) },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(stringio_locals_dict, stringio_locals_dict_table);
|
|
|
|
STATIC const mp_stream_p_t stringio_stream_p = {
|
|
.read = stringio_read,
|
|
.write = stringio_write,
|
|
.ioctl = stringio_ioctl,
|
|
.is_text = true,
|
|
};
|
|
|
|
STATIC const mp_stream_p_t bytesio_stream_p = {
|
|
.read = stringio_read,
|
|
.write = stringio_write,
|
|
.ioctl = stringio_ioctl,
|
|
};
|
|
|
|
const mp_obj_type_t mp_type_stringio = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_StringIO,
|
|
.print = stringio_print,
|
|
.make_new = stringio_make_new,
|
|
.getiter = mp_identity,
|
|
.iternext = mp_stream_unbuffered_iter,
|
|
.protocol = &stringio_stream_p,
|
|
.locals_dict = (mp_obj_dict_t*)&stringio_locals_dict,
|
|
};
|
|
|
|
#if MICROPY_PY_IO_BYTESIO
|
|
const mp_obj_type_t mp_type_bytesio = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_BytesIO,
|
|
.print = stringio_print,
|
|
.make_new = stringio_make_new,
|
|
.getiter = mp_identity,
|
|
.iternext = mp_stream_unbuffered_iter,
|
|
.protocol = &bytesio_stream_p,
|
|
.locals_dict = (mp_obj_dict_t*)&stringio_locals_dict,
|
|
};
|
|
#endif
|
|
|
|
#endif
|