#include <stdio.h>

#include <string.h>

#include "mpconfig.h"

#include "nlr.h"

#include "misc.h"

#include "qstr.h"

#include "obj.h"

#include "runtime.h"

#include "stream.h"

#include "objstr.h"

#if MICROPY_PY_IO

typedef struct _mp_obj_stringio_t {

} mp_obj_stringio_t;

STATIC void stringio_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {

mp_obj_stringio_t *self = self_in;

print(env, self->base.type == &mp_type_stringio ? "<io.StringIO 0x%x>" : "<io.BytesIO 0x%x>", self->vstr);

}

STATIC machine_int_t stringio_read(mp_obj_t o_in, void *buf, machine_uint_t size, int *errcode) {

mp_obj_stringio_t *o = o_in;

machine_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 machine_int_t stringio_write(mp_obj_t o_in, const void *buf, machine_uint_t size, int *errcode) {

mp_obj_stringio_t *o = o_in;

machine_uint_t remaining = o->vstr->alloc - o->pos;

if (size > remaining) {

// Take all what's already allocated...

o->vstr->len = o->vstr->alloc;

// ... and add more

vstr_add_len(o->vstr, size - remaining);

}

memcpy(o->vstr->buf + o->pos, buf, size);

o->pos += size;

if (o->pos > o->vstr->len) {

o->vstr->len = o->pos;

}

return size;

}

#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 = self_in;

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 = self_in;

vstr_free(self->vstr);

self->vstr = NULL;

return mp_const_none;

}

STATIC MP_DEFINE_CONST_FUN_OBJ_1(stringio_close_obj, stringio_close);

mp_obj_t stringio___exit__(uint n_args, const mp_obj_t *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(mp_obj_t type_in) {

mp_obj_stringio_t *o = m_new_obj(mp_obj_stringio_t);

o->base.type = type_in;

o->vstr = vstr_new();

o->pos = 0;

return o;

}

STATIC mp_obj_t stringio_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {

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(o, bufinfo.buf, bufinfo.len, NULL);

// Cur ptr is always at the beginning of buffer at the construction

o->pos = 0;

}

return o;

}

STATIC const mp_map_elem_t stringio_locals_dict_table[] = {

{ MP_OBJ_NEW_QSTR(MP_QSTR_read), (mp_obj_t)&mp_stream_read_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_readall), (mp_obj_t)&mp_stream_readall_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_readline), (mp_obj_t)&mp_stream_unbuffered_readline_obj},

{ MP_OBJ_NEW_QSTR(MP_QSTR_write), (mp_obj_t)&mp_stream_write_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_close), (mp_obj_t)&stringio_close_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR_getvalue), (mp_obj_t)&stringio_getvalue_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR___enter__), (mp_obj_t)&mp_identity_obj },

{ MP_OBJ_NEW_QSTR(MP_QSTR___exit__), (mp_obj_t)&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,

};

STATIC const mp_stream_p_t bytesio_stream_p = {

.read = stringio_read,

.write = stringio_write,

.is_bytes = true,

};

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,

.stream_p = &stringio_stream_p,

.locals_dict = (mp_obj_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,

.stream_p = &bytesio_stream_p,

.locals_dict = (mp_obj_t)&stringio_locals_dict,

};