forked from Mirrorlandia_minetest/minetest
657 lines
16 KiB
C++
657 lines
16 KiB
C++
/*
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Minetest
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Copyright (C) 2010-2013 celeron55, Perttu Ahola <celeron55@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#pragma once
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#include "irrlichttypes_bloated.h"
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#include "exceptions.h" // for SerializationError
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#include "debug.h" // for assert
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#include "config.h"
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#if HAVE_ENDIAN_H
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#ifdef _WIN32
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#define __BYTE_ORDER 0
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#define __LITTLE_ENDIAN 0
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#define __BIG_ENDIAN 1
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#elif defined(__MACH__) && defined(__APPLE__)
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#include <machine/endian.h>
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#elif defined(__FreeBSD__)
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#include <sys/endian.h>
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#else
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#include <endian.h>
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#endif
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#endif
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#include <cstring> // for memcpy
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#include <iostream>
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#include <string>
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#include <vector>
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#define FIXEDPOINT_FACTOR 1000.0f
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// 0x7FFFFFFF / 1000.0f is not serializable.
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// The limited float precision at this magnitude may cause the result to round
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// to a greater value than can be represented by a 32 bit integer when increased
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// by a factor of FIXEDPOINT_FACTOR. As a result, [F1000_MIN..F1000_MAX] does
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// not represent the full range, but rather the largest safe range, of values on
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// all supported architectures. Note: This definition makes assumptions on
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// platform float-to-int conversion behavior.
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#define F1000_MIN ((float)(s32)((-0x7FFFFFFF - 1) / FIXEDPOINT_FACTOR))
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#define F1000_MAX ((float)(s32)((0x7FFFFFFF) / FIXEDPOINT_FACTOR))
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#define STRING_MAX_LEN 0xFFFF
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#define WIDE_STRING_MAX_LEN 0xFFFF
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// 64 MB ought to be enough for anybody - Billy G.
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#define LONG_STRING_MAX_LEN (64 * 1024 * 1024)
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#if HAVE_ENDIAN_H
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// use machine native byte swapping routines
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// Note: memcpy below is optimized out by modern compilers
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inline u16 readU16(const u8 *data)
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{
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u16 val;
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memcpy(&val, data, 2);
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return be16toh(val);
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}
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inline u32 readU32(const u8 *data)
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{
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u32 val;
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memcpy(&val, data, 4);
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return be32toh(val);
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}
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inline u64 readU64(const u8 *data)
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{
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u64 val;
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memcpy(&val, data, 8);
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return be64toh(val);
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}
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inline void writeU16(u8 *data, u16 i)
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{
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u16 val = htobe16(i);
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memcpy(data, &val, 2);
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}
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inline void writeU32(u8 *data, u32 i)
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{
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u32 val = htobe32(i);
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memcpy(data, &val, 4);
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}
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inline void writeU64(u8 *data, u64 i)
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{
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u64 val = htobe64(i);
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memcpy(data, &val, 8);
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}
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#else
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// generic byte-swapping implementation
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inline u16 readU16(const u8 *data)
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{
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return
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((u16)data[0] << 8) | ((u16)data[1] << 0);
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}
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inline u32 readU32(const u8 *data)
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{
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return
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((u32)data[0] << 24) | ((u32)data[1] << 16) |
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((u32)data[2] << 8) | ((u32)data[3] << 0);
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}
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inline u64 readU64(const u8 *data)
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{
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return
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((u64)data[0] << 56) | ((u64)data[1] << 48) |
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((u64)data[2] << 40) | ((u64)data[3] << 32) |
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((u64)data[4] << 24) | ((u64)data[5] << 16) |
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((u64)data[6] << 8) | ((u64)data[7] << 0);
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}
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inline void writeU16(u8 *data, u16 i)
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{
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data[0] = (i >> 8) & 0xFF;
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data[1] = (i >> 0) & 0xFF;
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}
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inline void writeU32(u8 *data, u32 i)
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{
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data[0] = (i >> 24) & 0xFF;
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data[1] = (i >> 16) & 0xFF;
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data[2] = (i >> 8) & 0xFF;
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data[3] = (i >> 0) & 0xFF;
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}
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inline void writeU64(u8 *data, u64 i)
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{
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data[0] = (i >> 56) & 0xFF;
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data[1] = (i >> 48) & 0xFF;
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data[2] = (i >> 40) & 0xFF;
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data[3] = (i >> 32) & 0xFF;
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data[4] = (i >> 24) & 0xFF;
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data[5] = (i >> 16) & 0xFF;
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data[6] = (i >> 8) & 0xFF;
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data[7] = (i >> 0) & 0xFF;
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}
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#endif // HAVE_ENDIAN_H
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//////////////// read routines ////////////////
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inline u8 readU8(const u8 *data)
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{
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return ((u8)data[0] << 0);
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}
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inline s8 readS8(const u8 *data)
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{
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return (s8)readU8(data);
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}
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inline s16 readS16(const u8 *data)
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{
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return (s16)readU16(data);
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}
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inline s32 readS32(const u8 *data)
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{
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return (s32)readU32(data);
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}
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inline s64 readS64(const u8 *data)
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{
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return (s64)readU64(data);
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}
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inline f32 readF1000(const u8 *data)
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{
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return (f32)readS32(data) / FIXEDPOINT_FACTOR;
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}
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inline video::SColor readARGB8(const u8 *data)
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{
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video::SColor p(readU32(data));
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return p;
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}
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inline v2s16 readV2S16(const u8 *data)
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{
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v2s16 p;
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p.X = readS16(&data[0]);
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p.Y = readS16(&data[2]);
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return p;
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}
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inline v3s16 readV3S16(const u8 *data)
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{
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v3s16 p;
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p.X = readS16(&data[0]);
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p.Y = readS16(&data[2]);
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p.Z = readS16(&data[4]);
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return p;
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}
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inline v2s32 readV2S32(const u8 *data)
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{
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v2s32 p;
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p.X = readS32(&data[0]);
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p.Y = readS32(&data[4]);
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return p;
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}
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inline v3s32 readV3S32(const u8 *data)
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{
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v3s32 p;
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p.X = readS32(&data[0]);
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p.Y = readS32(&data[4]);
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p.Z = readS32(&data[8]);
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return p;
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}
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inline v2f readV2F1000(const u8 *data)
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{
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v2f p;
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p.X = (float)readF1000(&data[0]);
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p.Y = (float)readF1000(&data[4]);
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return p;
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}
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inline v3f readV3F1000(const u8 *data)
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{
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v3f p;
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p.X = (float)readF1000(&data[0]);
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p.Y = (float)readF1000(&data[4]);
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p.Z = (float)readF1000(&data[8]);
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return p;
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}
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/////////////// write routines ////////////////
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inline void writeU8(u8 *data, u8 i)
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{
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data[0] = (i >> 0) & 0xFF;
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}
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inline void writeS8(u8 *data, s8 i)
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{
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writeU8(data, (u8)i);
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}
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inline void writeS16(u8 *data, s16 i)
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{
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writeU16(data, (u16)i);
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}
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inline void writeS32(u8 *data, s32 i)
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{
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writeU32(data, (u32)i);
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}
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inline void writeS64(u8 *data, s64 i)
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{
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writeU64(data, (u64)i);
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}
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inline void writeF1000(u8 *data, f32 i)
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{
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assert(i >= F1000_MIN && i <= F1000_MAX);
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writeS32(data, i * FIXEDPOINT_FACTOR);
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}
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inline void writeARGB8(u8 *data, video::SColor p)
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{
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writeU32(data, p.color);
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}
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inline void writeV2S16(u8 *data, v2s16 p)
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{
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writeS16(&data[0], p.X);
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writeS16(&data[2], p.Y);
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}
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inline void writeV3S16(u8 *data, v3s16 p)
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{
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writeS16(&data[0], p.X);
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writeS16(&data[2], p.Y);
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writeS16(&data[4], p.Z);
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}
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inline void writeV2S32(u8 *data, v2s32 p)
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{
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writeS32(&data[0], p.X);
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writeS32(&data[4], p.Y);
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}
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inline void writeV3S32(u8 *data, v3s32 p)
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{
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writeS32(&data[0], p.X);
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writeS32(&data[4], p.Y);
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writeS32(&data[8], p.Z);
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}
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inline void writeV2F1000(u8 *data, v2f p)
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{
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writeF1000(&data[0], p.X);
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writeF1000(&data[4], p.Y);
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}
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inline void writeV3F1000(u8 *data, v3f p)
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{
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writeF1000(&data[0], p.X);
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writeF1000(&data[4], p.Y);
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writeF1000(&data[8], p.Z);
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}
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////
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//// Iostream wrapper for data read/write
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////
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#define MAKE_STREAM_READ_FXN(T, N, S) \
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inline T read ## N(std::istream &is) \
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{ \
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char buf[S] = {0}; \
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is.read(buf, sizeof(buf)); \
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return read ## N((u8 *)buf); \
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}
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#define MAKE_STREAM_WRITE_FXN(T, N, S) \
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inline void write ## N(std::ostream &os, T val) \
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{ \
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char buf[S]; \
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write ## N((u8 *)buf, val); \
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os.write(buf, sizeof(buf)); \
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}
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MAKE_STREAM_READ_FXN(u8, U8, 1);
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MAKE_STREAM_READ_FXN(u16, U16, 2);
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MAKE_STREAM_READ_FXN(u32, U32, 4);
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MAKE_STREAM_READ_FXN(u64, U64, 8);
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MAKE_STREAM_READ_FXN(s8, S8, 1);
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MAKE_STREAM_READ_FXN(s16, S16, 2);
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MAKE_STREAM_READ_FXN(s32, S32, 4);
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MAKE_STREAM_READ_FXN(s64, S64, 8);
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MAKE_STREAM_READ_FXN(f32, F1000, 4);
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MAKE_STREAM_READ_FXN(v2s16, V2S16, 4);
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MAKE_STREAM_READ_FXN(v3s16, V3S16, 6);
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MAKE_STREAM_READ_FXN(v2s32, V2S32, 8);
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MAKE_STREAM_READ_FXN(v3s32, V3S32, 12);
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MAKE_STREAM_READ_FXN(v2f, V2F1000, 8);
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MAKE_STREAM_READ_FXN(v3f, V3F1000, 12);
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MAKE_STREAM_READ_FXN(video::SColor, ARGB8, 4);
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MAKE_STREAM_WRITE_FXN(u8, U8, 1);
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MAKE_STREAM_WRITE_FXN(u16, U16, 2);
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MAKE_STREAM_WRITE_FXN(u32, U32, 4);
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MAKE_STREAM_WRITE_FXN(u64, U64, 8);
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MAKE_STREAM_WRITE_FXN(s8, S8, 1);
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MAKE_STREAM_WRITE_FXN(s16, S16, 2);
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MAKE_STREAM_WRITE_FXN(s32, S32, 4);
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MAKE_STREAM_WRITE_FXN(s64, S64, 8);
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MAKE_STREAM_WRITE_FXN(f32, F1000, 4);
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MAKE_STREAM_WRITE_FXN(v2s16, V2S16, 4);
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MAKE_STREAM_WRITE_FXN(v3s16, V3S16, 6);
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MAKE_STREAM_WRITE_FXN(v2s32, V2S32, 8);
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MAKE_STREAM_WRITE_FXN(v3s32, V3S32, 12);
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MAKE_STREAM_WRITE_FXN(v2f, V2F1000, 8);
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MAKE_STREAM_WRITE_FXN(v3f, V3F1000, 12);
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MAKE_STREAM_WRITE_FXN(video::SColor, ARGB8, 4);
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////
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//// More serialization stuff
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////
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// Creates a string with the length as the first two bytes
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std::string serializeString(const std::string &plain);
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// Creates a string with the length as the first two bytes from wide string
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std::string serializeWideString(const std::wstring &plain);
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// Reads a string with the length as the first two bytes
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std::string deSerializeString(std::istream &is);
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// Reads a wide string with the length as the first two bytes
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std::wstring deSerializeWideString(std::istream &is);
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// Creates a string with the length as the first four bytes
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std::string serializeLongString(const std::string &plain);
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// Reads a string with the length as the first four bytes
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std::string deSerializeLongString(std::istream &is);
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// Creates a string encoded in JSON format (almost equivalent to a C string literal)
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std::string serializeJsonString(const std::string &plain);
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// Reads a string encoded in JSON format
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std::string deSerializeJsonString(std::istream &is);
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// If the string contains spaces, quotes or control characters, encodes as JSON.
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// Else returns the string unmodified.
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std::string serializeJsonStringIfNeeded(const std::string &s);
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// Parses a string serialized by serializeJsonStringIfNeeded.
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std::string deSerializeJsonStringIfNeeded(std::istream &is);
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// Creates a string consisting of the hexadecimal representation of `data`
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std::string serializeHexString(const std::string &data, bool insert_spaces=false);
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// Creates a string containing comma delimited values of a struct whose layout is
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// described by the parameter format
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bool serializeStructToString(std::string *out,
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std::string format, void *value);
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// Reads a comma delimited string of values into a struct whose layout is
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// decribed by the parameter format
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bool deSerializeStringToStruct(std::string valstr,
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std::string format, void *out, size_t olen);
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////
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//// BufReader
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////
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#define MAKE_BUFREADER_GETNOEX_FXN(T, N, S) \
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inline bool get ## N ## NoEx(T *val) \
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{ \
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if (pos + S > size) \
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return false; \
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*val = read ## N(data + pos); \
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pos += S; \
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return true; \
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}
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#define MAKE_BUFREADER_GET_FXN(T, N) \
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inline T get ## N() \
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{ \
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T val; \
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if (!get ## N ## NoEx(&val)) \
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throw SerializationError("Attempted read past end of data"); \
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return val; \
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}
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class BufReader {
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public:
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BufReader(const u8 *data_, size_t size_) :
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data(data_),
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size(size_)
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{
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}
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MAKE_BUFREADER_GETNOEX_FXN(u8, U8, 1);
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MAKE_BUFREADER_GETNOEX_FXN(u16, U16, 2);
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MAKE_BUFREADER_GETNOEX_FXN(u32, U32, 4);
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MAKE_BUFREADER_GETNOEX_FXN(u64, U64, 8);
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MAKE_BUFREADER_GETNOEX_FXN(s8, S8, 1);
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MAKE_BUFREADER_GETNOEX_FXN(s16, S16, 2);
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MAKE_BUFREADER_GETNOEX_FXN(s32, S32, 4);
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MAKE_BUFREADER_GETNOEX_FXN(s64, S64, 8);
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MAKE_BUFREADER_GETNOEX_FXN(f32, F1000, 4);
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MAKE_BUFREADER_GETNOEX_FXN(v2s16, V2S16, 4);
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MAKE_BUFREADER_GETNOEX_FXN(v3s16, V3S16, 6);
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MAKE_BUFREADER_GETNOEX_FXN(v2s32, V2S32, 8);
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MAKE_BUFREADER_GETNOEX_FXN(v3s32, V3S32, 12);
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MAKE_BUFREADER_GETNOEX_FXN(v2f, V2F1000, 8);
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MAKE_BUFREADER_GETNOEX_FXN(v3f, V3F1000, 12);
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MAKE_BUFREADER_GETNOEX_FXN(video::SColor, ARGB8, 4);
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bool getStringNoEx(std::string *val);
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bool getWideStringNoEx(std::wstring *val);
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bool getLongStringNoEx(std::string *val);
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bool getRawDataNoEx(void *data, size_t len);
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MAKE_BUFREADER_GET_FXN(u8, U8);
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MAKE_BUFREADER_GET_FXN(u16, U16);
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MAKE_BUFREADER_GET_FXN(u32, U32);
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MAKE_BUFREADER_GET_FXN(u64, U64);
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MAKE_BUFREADER_GET_FXN(s8, S8);
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MAKE_BUFREADER_GET_FXN(s16, S16);
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MAKE_BUFREADER_GET_FXN(s32, S32);
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MAKE_BUFREADER_GET_FXN(s64, S64);
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MAKE_BUFREADER_GET_FXN(f32, F1000);
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MAKE_BUFREADER_GET_FXN(v2s16, V2S16);
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MAKE_BUFREADER_GET_FXN(v3s16, V3S16);
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MAKE_BUFREADER_GET_FXN(v2s32, V2S32);
|
|
MAKE_BUFREADER_GET_FXN(v3s32, V3S32);
|
|
MAKE_BUFREADER_GET_FXN(v2f, V2F1000);
|
|
MAKE_BUFREADER_GET_FXN(v3f, V3F1000);
|
|
MAKE_BUFREADER_GET_FXN(video::SColor, ARGB8);
|
|
MAKE_BUFREADER_GET_FXN(std::string, String);
|
|
MAKE_BUFREADER_GET_FXN(std::wstring, WideString);
|
|
MAKE_BUFREADER_GET_FXN(std::string, LongString);
|
|
|
|
inline void getRawData(void *val, size_t len)
|
|
{
|
|
if (!getRawDataNoEx(val, len))
|
|
throw SerializationError("Attempted read past end of data");
|
|
}
|
|
|
|
inline size_t remaining()
|
|
{
|
|
assert(pos <= size);
|
|
return size - pos;
|
|
}
|
|
|
|
const u8 *data;
|
|
size_t size;
|
|
size_t pos = 0;
|
|
};
|
|
|
|
#undef MAKE_BUFREADER_GET_FXN
|
|
#undef MAKE_BUFREADER_GETNOEX_FXN
|
|
|
|
|
|
////
|
|
//// Vector-based write routines
|
|
////
|
|
|
|
inline void putU8(std::vector<u8> *dest, u8 val)
|
|
{
|
|
dest->push_back((val >> 0) & 0xFF);
|
|
}
|
|
|
|
inline void putU16(std::vector<u8> *dest, u16 val)
|
|
{
|
|
dest->push_back((val >> 8) & 0xFF);
|
|
dest->push_back((val >> 0) & 0xFF);
|
|
}
|
|
|
|
inline void putU32(std::vector<u8> *dest, u32 val)
|
|
{
|
|
dest->push_back((val >> 24) & 0xFF);
|
|
dest->push_back((val >> 16) & 0xFF);
|
|
dest->push_back((val >> 8) & 0xFF);
|
|
dest->push_back((val >> 0) & 0xFF);
|
|
}
|
|
|
|
inline void putU64(std::vector<u8> *dest, u64 val)
|
|
{
|
|
dest->push_back((val >> 56) & 0xFF);
|
|
dest->push_back((val >> 48) & 0xFF);
|
|
dest->push_back((val >> 40) & 0xFF);
|
|
dest->push_back((val >> 32) & 0xFF);
|
|
dest->push_back((val >> 24) & 0xFF);
|
|
dest->push_back((val >> 16) & 0xFF);
|
|
dest->push_back((val >> 8) & 0xFF);
|
|
dest->push_back((val >> 0) & 0xFF);
|
|
}
|
|
|
|
inline void putS8(std::vector<u8> *dest, s8 val)
|
|
{
|
|
putU8(dest, val);
|
|
}
|
|
|
|
inline void putS16(std::vector<u8> *dest, s16 val)
|
|
{
|
|
putU16(dest, val);
|
|
}
|
|
|
|
inline void putS32(std::vector<u8> *dest, s32 val)
|
|
{
|
|
putU32(dest, val);
|
|
}
|
|
|
|
inline void putS64(std::vector<u8> *dest, s64 val)
|
|
{
|
|
putU64(dest, val);
|
|
}
|
|
|
|
inline void putF1000(std::vector<u8> *dest, f32 val)
|
|
{
|
|
putS32(dest, val * FIXEDPOINT_FACTOR);
|
|
}
|
|
|
|
inline void putV2S16(std::vector<u8> *dest, v2s16 val)
|
|
{
|
|
putS16(dest, val.X);
|
|
putS16(dest, val.Y);
|
|
}
|
|
|
|
inline void putV3S16(std::vector<u8> *dest, v3s16 val)
|
|
{
|
|
putS16(dest, val.X);
|
|
putS16(dest, val.Y);
|
|
putS16(dest, val.Z);
|
|
}
|
|
|
|
inline void putV2S32(std::vector<u8> *dest, v2s32 val)
|
|
{
|
|
putS32(dest, val.X);
|
|
putS32(dest, val.Y);
|
|
}
|
|
|
|
inline void putV3S32(std::vector<u8> *dest, v3s32 val)
|
|
{
|
|
putS32(dest, val.X);
|
|
putS32(dest, val.Y);
|
|
putS32(dest, val.Z);
|
|
}
|
|
|
|
inline void putV2F1000(std::vector<u8> *dest, v2f val)
|
|
{
|
|
putF1000(dest, val.X);
|
|
putF1000(dest, val.Y);
|
|
}
|
|
|
|
inline void putV3F1000(std::vector<u8> *dest, v3f val)
|
|
{
|
|
putF1000(dest, val.X);
|
|
putF1000(dest, val.Y);
|
|
putF1000(dest, val.Z);
|
|
}
|
|
|
|
inline void putARGB8(std::vector<u8> *dest, video::SColor val)
|
|
{
|
|
putU32(dest, val.color);
|
|
}
|
|
|
|
inline void putString(std::vector<u8> *dest, const std::string &val)
|
|
{
|
|
if (val.size() > STRING_MAX_LEN)
|
|
throw SerializationError("String too long");
|
|
|
|
putU16(dest, val.size());
|
|
dest->insert(dest->end(), val.begin(), val.end());
|
|
}
|
|
|
|
inline void putWideString(std::vector<u8> *dest, const std::wstring &val)
|
|
{
|
|
if (val.size() > WIDE_STRING_MAX_LEN)
|
|
throw SerializationError("String too long");
|
|
|
|
putU16(dest, val.size());
|
|
for (size_t i = 0; i != val.size(); i++)
|
|
putU16(dest, val[i]);
|
|
}
|
|
|
|
inline void putLongString(std::vector<u8> *dest, const std::string &val)
|
|
{
|
|
if (val.size() > LONG_STRING_MAX_LEN)
|
|
throw SerializationError("String too long");
|
|
|
|
putU32(dest, val.size());
|
|
dest->insert(dest->end(), val.begin(), val.end());
|
|
}
|
|
|
|
inline void putRawData(std::vector<u8> *dest, const void *src, size_t len)
|
|
{
|
|
dest->insert(dest->end(), (u8 *)src, (u8 *)src + len);
|
|
}
|