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virtualx-engine/core/io/stream_peer.cpp
Hein-Pieter van Braam 0e29f7974b Reduce unnecessary COW on Vector by make writing explicit 
This commit makes operator[] on Vector const and adds a write proxy to it.  From
now on writes to Vectors need to happen through the .write proxy. So for
instance:

Vector<int> vec;
vec.push_back(10);
std::cout << vec[0] << std::endl;
vec.write[0] = 20;

Failing to use the .write proxy will cause a compilation error.

In addition COWable datatypes can now embed a CowData pointer to their data.
This means that String, CharString, and VMap no longer use or derive from
Vector.

_ALWAYS_INLINE_ and _FORCE_INLINE_ are now equivalent for debug and non-debug
builds. This is a lot faster for Vector in the editor and while running tests.
The reason why this difference used to exist is because force-inlined methods
used to give a bad debugging experience. After extensive testing with modern
compilers this is no longer the case.
2018-07-26 00:54:16 +02:00

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/*************************************************************************/
/* stream_peer.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2018 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 "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 = PoolVector<uint8_t>::Write();
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 = PoolVector<uint8_t>::Write();
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_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) {
int len = 0;
Vector<uint8_t> buf;
encode_variant(p_variant, NULL, len);
buf.resize(len);
put_32(len);
encode_variant(p_variant, buf.ptrw(), len);
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) {
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) {
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() {
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;
decode_variant(ret, var.ptr(), len);
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_utf8_string", "value"), &StreamPeer::put_utf8_string);
ClassDB::bind_method(D_METHOD("put_var", "value"), &StreamPeer::put_var);
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);
ClassDB::bind_method(D_METHOD("get_utf8_string", "bytes"), &StreamPeer::get_utf8_string);
ClassDB::bind_method(D_METHOD("get_var"), &StreamPeer::get_var);
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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