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godot/core/io/stream_peer.cpp
Rémi Verschelde a7f49ac9a1 Update copyright statements to 2020 
Happy new year to the wonderful Godot community!

We're starting a new decade with a well-established, non-profit, free
and open source game engine, and tons of further improvements in the
pipeline from hundreds of contributors.

Godot will keep getting better, and we're looking forward to all the
games that the community will keep developing and releasing with it.
2020-01-01 11:16:22 +01:00

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/*************************************************************************/
/* stream_peer.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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 "stream_peer.h"
#include "core/io/marshalls.h"
Error StreamPeer::_put_data(const PoolVector<uint8_t> &p_data) {
int len = p_data.size();
if (len == 0)
return OK;
PoolVector<uint8_t>::Read r = p_data.read();
return put_data(&r[0], len);
}
Array StreamPeer::_put_partial_data(const PoolVector<uint8_t> &p_data) {
Array ret;
int len = p_data.size();
if (len == 0) {
ret.push_back(OK);
ret.push_back(0);
return ret;
}
PoolVector<uint8_t>::Read r = p_data.read();
int sent;
Error err = put_partial_data(&r[0], len, sent);
if (err != OK) {
sent = 0;
}
ret.push_back(err);
ret.push_back(sent);
return ret;
}
Array StreamPeer::_get_data(int p_bytes) {
Array ret;
PoolVector<uint8_t> data;
data.resize(p_bytes);
if (data.size() != p_bytes) {
ret.push_back(ERR_OUT_OF_MEMORY);
ret.push_back(PoolVector<uint8_t>());
return ret;
}
PoolVector<uint8_t>::Write w = data.write();
Error err = get_data(&w[0], p_bytes);
w.release();
ret.push_back(err);
ret.push_back(data);
return ret;
}
Array StreamPeer::_get_partial_data(int p_bytes) {
Array ret;
PoolVector<uint8_t> data;
data.resize(p_bytes);
if (data.size() != p_bytes) {
ret.push_back(ERR_OUT_OF_MEMORY);
ret.push_back(PoolVector<uint8_t>());
return ret;
}
PoolVector<uint8_t>::Write w = data.write();
int received;
Error err = get_partial_data(&w[0], p_bytes, received);
w.release();
if (err != OK) {
data.resize(0);
} else if (received != data.size()) {
data.resize(received);
}
ret.push_back(err);
ret.push_back(data);
return ret;
}
void StreamPeer::set_big_endian(bool p_enable) {
big_endian = p_enable;
}
bool StreamPeer::is_big_endian_enabled() const {
return big_endian;
}
void StreamPeer::put_u8(uint8_t p_val) {
put_data((const uint8_t *)&p_val, 1);
}
void StreamPeer::put_8(int8_t p_val) {
put_data((const uint8_t *)&p_val, 1);
}
void StreamPeer::put_u16(uint16_t p_val) {
if (big_endian) {
p_val = BSWAP16(p_val);
}
uint8_t buf[2];
encode_uint16(p_val, buf);
put_data(buf, 2);
}
void StreamPeer::put_16(int16_t p_val) {
if (big_endian) {
p_val = BSWAP16(p_val);
}
uint8_t buf[2];
encode_uint16(p_val, buf);
put_data(buf, 2);
}
void StreamPeer::put_u32(uint32_t p_val) {
if (big_endian) {
p_val = BSWAP32(p_val);
}
uint8_t buf[4];
encode_uint32(p_val, buf);
put_data(buf, 4);
}
void StreamPeer::put_32(int32_t p_val) {
if (big_endian) {
p_val = BSWAP32(p_val);
}
uint8_t buf[4];
encode_uint32(p_val, buf);
put_data(buf, 4);
}
void StreamPeer::put_u64(uint64_t p_val) {
if (big_endian) {
p_val = BSWAP64(p_val);
}
uint8_t buf[8];
encode_uint64(p_val, buf);
put_data(buf, 8);
}
void StreamPeer::put_64(int64_t p_val) {
if (big_endian) {
p_val = BSWAP64(p_val);
}
uint8_t buf[8];
encode_uint64(p_val, buf);
put_data(buf, 8);
}
void StreamPeer::put_float(float p_val) {
uint8_t buf[4];
encode_float(p_val, buf);
if (big_endian) {
uint32_t *p32 = (uint32_t *)buf;
*p32 = BSWAP32(*p32);
}
put_data(buf, 4);
}
void StreamPeer::put_double(double p_val) {
uint8_t buf[8];
encode_double(p_val, buf);
if (big_endian) {
uint64_t *p64 = (uint64_t *)buf;
*p64 = BSWAP64(*p64);
}
put_data(buf, 8);
}
void StreamPeer::put_string(const String &p_string) {
CharString cs = p_string.ascii();
put_u32(cs.length());
put_data((const uint8_t *)cs.get_data(), cs.length());
}
void StreamPeer::put_utf8_string(const String &p_string) {
CharString cs = p_string.utf8();
put_u32(cs.length());
put_data((const uint8_t *)cs.get_data(), cs.length());
}
void StreamPeer::put_var(const Variant &p_variant, bool p_full_objects) {
int len = 0;
Vector<uint8_t> buf;
encode_variant(p_variant, NULL, len, p_full_objects);
buf.resize(len);
put_32(len);
encode_variant(p_variant, buf.ptrw(), len, p_full_objects);
put_data(buf.ptr(), buf.size());
}
uint8_t StreamPeer::get_u8() {
uint8_t buf[1];
get_data(buf, 1);
return buf[0];
}
int8_t StreamPeer::get_8() {
uint8_t buf[1];
get_data(buf, 1);
return buf[0];
}
uint16_t StreamPeer::get_u16() {
uint8_t buf[2];
get_data(buf, 2);
uint16_t r = decode_uint16(buf);
if (big_endian) {
r = BSWAP16(r);
}
return r;
}
int16_t StreamPeer::get_16() {
uint8_t buf[2];
get_data(buf, 2);
uint16_t r = decode_uint16(buf);
if (big_endian) {
r = BSWAP16(r);
}
return r;
}
uint32_t StreamPeer::get_u32() {
uint8_t buf[4];
get_data(buf, 4);
uint32_t r = decode_uint32(buf);
if (big_endian) {
r = BSWAP32(r);
}
return r;
}
int32_t StreamPeer::get_32() {
uint8_t buf[4];
get_data(buf, 4);
uint32_t r = decode_uint32(buf);
if (big_endian) {
r = BSWAP32(r);
}
return r;
}
uint64_t StreamPeer::get_u64() {
uint8_t buf[8];
get_data(buf, 8);
uint64_t r = decode_uint64(buf);
if (big_endian) {
r = BSWAP64(r);
}
return r;
}
int64_t StreamPeer::get_64() {
uint8_t buf[8];
get_data(buf, 8);
uint64_t r = decode_uint64(buf);
if (big_endian) {
r = BSWAP64(r);
}
return r;
}
float StreamPeer::get_float() {
uint8_t buf[4];
get_data(buf, 4);
if (big_endian) {
uint32_t *p32 = (uint32_t *)buf;
*p32 = BSWAP32(*p32);
}
return decode_float(buf);
}
double StreamPeer::get_double() {
uint8_t buf[8];
get_data(buf, 8);
if (big_endian) {
uint64_t *p64 = (uint64_t *)buf;
*p64 = BSWAP64(*p64);
}
return decode_double(buf);
}
String StreamPeer::get_string(int p_bytes) {
if (p_bytes < 0)
p_bytes = get_u32();
ERR_FAIL_COND_V(p_bytes < 0, String());
Vector<char> buf;
Error err = buf.resize(p_bytes + 1);
ERR_FAIL_COND_V(err != OK, String());
err = get_data((uint8_t *)&buf[0], p_bytes);
ERR_FAIL_COND_V(err != OK, String());
buf.write[p_bytes] = 0;
return buf.ptr();
}
String StreamPeer::get_utf8_string(int p_bytes) {
if (p_bytes < 0)
p_bytes = get_u32();
ERR_FAIL_COND_V(p_bytes < 0, String());
Vector<uint8_t> buf;
Error err = buf.resize(p_bytes);
ERR_FAIL_COND_V(err != OK, String());
err = get_data(buf.ptrw(), p_bytes);
ERR_FAIL_COND_V(err != OK, String());
String ret;
ret.parse_utf8((const char *)buf.ptr(), buf.size());
return ret;
}
Variant StreamPeer::get_var(bool p_allow_objects) {
int len = get_32();
Vector<uint8_t> var;
Error err = var.resize(len);
ERR_FAIL_COND_V(err != OK, Variant());
err = get_data(var.ptrw(), len);
ERR_FAIL_COND_V(err != OK, Variant());
Variant ret;
err = decode_variant(ret, var.ptr(), len, NULL, p_allow_objects);
ERR_FAIL_COND_V_MSG(err != OK, Variant(), "Error when trying to decode Variant.");
return ret;
}
void StreamPeer::_bind_methods() {
ClassDB::bind_method(D_METHOD("put_data", "data"), &StreamPeer::_put_data);
ClassDB::bind_method(D_METHOD("put_partial_data", "data"), &StreamPeer::_put_partial_data);
ClassDB::bind_method(D_METHOD("get_data", "bytes"), &StreamPeer::_get_data);
ClassDB::bind_method(D_METHOD("get_partial_data", "bytes"), &StreamPeer::_get_partial_data);
ClassDB::bind_method(D_METHOD("get_available_bytes"), &StreamPeer::get_available_bytes);
ClassDB::bind_method(D_METHOD("set_big_endian", "enable"), &StreamPeer::set_big_endian);
ClassDB::bind_method(D_METHOD("is_big_endian_enabled"), &StreamPeer::is_big_endian_enabled);
ClassDB::bind_method(D_METHOD("put_8", "value"), &StreamPeer::put_8);
ClassDB::bind_method(D_METHOD("put_u8", "value"), &StreamPeer::put_u8);
ClassDB::bind_method(D_METHOD("put_16", "value"), &StreamPeer::put_16);
ClassDB::bind_method(D_METHOD("put_u16", "value"), &StreamPeer::put_u16);
ClassDB::bind_method(D_METHOD("put_32", "value"), &StreamPeer::put_32);
ClassDB::bind_method(D_METHOD("put_u32", "value"), &StreamPeer::put_u32);
ClassDB::bind_method(D_METHOD("put_64", "value"), &StreamPeer::put_64);
ClassDB::bind_method(D_METHOD("put_u64", "value"), &StreamPeer::put_u64);
ClassDB::bind_method(D_METHOD("put_float", "value"), &StreamPeer::put_float);
ClassDB::bind_method(D_METHOD("put_double", "value"), &StreamPeer::put_double);
ClassDB::bind_method(D_METHOD("put_string", "value"), &StreamPeer::put_string);
ClassDB::bind_method(D_METHOD("put_utf8_string", "value"), &StreamPeer::put_utf8_string);
ClassDB::bind_method(D_METHOD("put_var", "value", "full_objects"), &StreamPeer::put_var, DEFVAL(false));
ClassDB::bind_method(D_METHOD("get_8"), &StreamPeer::get_8);
ClassDB::bind_method(D_METHOD("get_u8"), &StreamPeer::get_u8);
ClassDB::bind_method(D_METHOD("get_16"), &StreamPeer::get_16);
ClassDB::bind_method(D_METHOD("get_u16"), &StreamPeer::get_u16);
ClassDB::bind_method(D_METHOD("get_32"), &StreamPeer::get_32);
ClassDB::bind_method(D_METHOD("get_u32"), &StreamPeer::get_u32);
ClassDB::bind_method(D_METHOD("get_64"), &StreamPeer::get_64);
ClassDB::bind_method(D_METHOD("get_u64"), &StreamPeer::get_u64);
ClassDB::bind_method(D_METHOD("get_float"), &StreamPeer::get_float);
ClassDB::bind_method(D_METHOD("get_double"), &StreamPeer::get_double);
ClassDB::bind_method(D_METHOD("get_string", "bytes"), &StreamPeer::get_string, DEFVAL(-1));
ClassDB::bind_method(D_METHOD("get_utf8_string", "bytes"), &StreamPeer::get_utf8_string, DEFVAL(-1));
ClassDB::bind_method(D_METHOD("get_var", "allow_objects"), &StreamPeer::get_var, DEFVAL(false));
ADD_PROPERTY(PropertyInfo(Variant::BOOL, "big_endian"), "set_big_endian", "is_big_endian_enabled");
}
////////////////////////////////
void StreamPeerBuffer::_bind_methods() {
ClassDB::bind_method(D_METHOD("seek", "position"), &StreamPeerBuffer::seek);
ClassDB::bind_method(D_METHOD("get_size"), &StreamPeerBuffer::get_size);
ClassDB::bind_method(D_METHOD("get_position"), &StreamPeerBuffer::get_position);
ClassDB::bind_method(D_METHOD("resize", "size"), &StreamPeerBuffer::resize);
ClassDB::bind_method(D_METHOD("set_data_array", "data"), &StreamPeerBuffer::set_data_array);
ClassDB::bind_method(D_METHOD("get_data_array"), &StreamPeerBuffer::get_data_array);
ClassDB::bind_method(D_METHOD("clear"), &StreamPeerBuffer::clear);
ClassDB::bind_method(D_METHOD("duplicate"), &StreamPeerBuffer::duplicate);
ADD_PROPERTY(PropertyInfo(Variant::POOL_BYTE_ARRAY, "data_array"), "set_data_array", "get_data_array");
}
Error StreamPeerBuffer::put_data(const uint8_t *p_data, int p_bytes) {
if (p_bytes <= 0)
return OK;
if (pointer + p_bytes > data.size()) {
data.resize(pointer + p_bytes);
}
PoolVector<uint8_t>::Write w = data.write();
copymem(&w[pointer], p_data, p_bytes);
pointer += p_bytes;
return OK;
}
Error StreamPeerBuffer::put_partial_data(const uint8_t *p_data, int p_bytes, int &r_sent) {
r_sent = p_bytes;
return put_data(p_data, p_bytes);
}
Error StreamPeerBuffer::get_data(uint8_t *p_buffer, int p_bytes) {
int recv;
get_partial_data(p_buffer, p_bytes, recv);
if (recv != p_bytes)
return ERR_INVALID_PARAMETER;
return OK;
}
Error StreamPeerBuffer::get_partial_data(uint8_t *p_buffer, int p_bytes, int &r_received) {
if (pointer + p_bytes > data.size()) {
r_received = data.size() - pointer;
if (r_received <= 0) {
r_received = 0;
return OK; //you got 0
}
} else {
r_received = p_bytes;
}
PoolVector<uint8_t>::Read r = data.read();
copymem(p_buffer, r.ptr() + pointer, r_received);
pointer += r_received;
// FIXME: return what? OK or ERR_*
// return OK for now so we don't maybe return garbage
return OK;
}
int StreamPeerBuffer::get_available_bytes() const {
return data.size() - pointer;
}
void StreamPeerBuffer::seek(int p_pos) {
ERR_FAIL_COND(p_pos < 0);
ERR_FAIL_COND(p_pos > data.size());
pointer = p_pos;
}
int StreamPeerBuffer::get_size() const {
return data.size();
}
int StreamPeerBuffer::get_position() const {
return pointer;
}
void StreamPeerBuffer::resize(int p_size) {
data.resize(p_size);
}
void StreamPeerBuffer::set_data_array(const PoolVector<uint8_t> &p_data) {
data = p_data;
pointer = 0;
}
PoolVector<uint8_t> StreamPeerBuffer::get_data_array() const {
return data;
}
void StreamPeerBuffer::clear() {
data.resize(0);
pointer = 0;
}
Ref<StreamPeerBuffer> StreamPeerBuffer::duplicate() const {
Ref<StreamPeerBuffer> spb;
spb.instance();
spb->data = data;
return spb;
}
StreamPeerBuffer::StreamPeerBuffer() {
pointer = 0;
}
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