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serialize.h: use machine native byte swapping if available, fall-back to previous generic method if not (supported for GCC using endian.h, detection done in cmake) write/readARGB8() - just write 32-bit color in one op, instead of 4 1-byte ops cleanup: removed unneeded buffer init for some serialize-out functions use a #define for the fixed point factor in read/writeF1000()

Browse Source 
nodemetadata.cpp, nodetimer.cpp
	optimzation: simpler deserialize node position method

staticobject.cpp:
	cleanup: use util/serialize.h inlines instead of its own de/serialization

serialize.cpp:
	minor optimization/cleanup: avoid generation of unneeded string temporary

CMakeLists.txt, cmake_config.h.in: detection of endian.h

config.h: added HAVE_ENDIAN_H

Commits due to feedback squashed

Signed-off-by: Craig Robbins <kde.psych@gmail.com>
This commit is contained in:
Rafael Reilova 2014-11-16 21:52:24 -05:00 committed by Craig Robbins
parent d406ac994b
commit f7d65091f8
8 changed files with 115 additions and 85 deletions
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3
src/CMakeLists.txt
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@ -2,6 +2,7 @@ project(minetest)
cmake_minimum_required( VERSION 2.6 )
INCLUDE(CheckCSourceRuns)
INCLUDE(CheckIncludeFiles)
# Set some random things default to not being visible in the GUI
mark_as_advanced(EXECUTABLE_OUTPUT_PATH LIBRARY_OUTPUT_PATH)
@ -313,6 +314,8 @@ if(ENABLE_REDIS)
endif(REDIS_LIBRARY AND REDIS_INCLUDE_DIR)
endif(ENABLE_REDIS)
CHECK_INCLUDE_FILES(endian.h HAVE_ENDIAN_H)
configure_file(
"${PROJECT_SOURCE_DIR}/cmake_config.h.in"
"${PROJECT_BINARY_DIR}/cmake_config.h"

1
src/cmake_config.h.in
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@ -20,6 +20,7 @@
#define CMAKE_VERSION_PATCH @VERSION_PATCH@
#define CMAKE_VERSION_PATCH_ORIG @VERSION_PATCH_ORIG@
#define CMAKE_VERSION_EXTRA_STRING "@VERSION_EXTRA@"
#define CMAKE_HAVE_ENDIAN_H @HAVE_ENDIAN_H@
#ifdef NDEBUG
#define CMAKE_BUILD_TYPE "Release"

4
src/config.h
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@ -36,6 +36,8 @@
#define USE_REDIS 0
#endif
#define HAVE_ENDIAN_H 0
#ifdef USE_CMAKE_CONFIG_H
#include "cmake_config.h"
#undef PROJECT_NAME
@ -72,6 +74,8 @@
#define PRODUCT_VERSION_STRING CMAKE_PRODUCT_VERSION_STRING
#undef VERSION_EXTRA_STRING
#define VERSION_EXTRA_STRING CMAKE_VERSION_EXTRA_STRING
#undef HAVE_ENDIAN_H
#define HAVE_ENDIAN_H CMAKE_HAVE_ENDIAN_H
#endif
#ifdef __ANDROID__

12
src/nodemetadata.cpp
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@ -130,12 +130,12 @@ void NodeMetadataList::deSerialize(std::istream &is, IGameDef *gamedef)
{
u16 p16 = readU16(is);
v3s16 p(0,0,0);
p.Z += p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
p16 -= p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
p.Y += p16 / MAP_BLOCKSIZE;
p16 -= p.Y * MAP_BLOCKSIZE;
p.X += p16;
v3s16 p;
p.Z = p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
p16 &= MAP_BLOCKSIZE * MAP_BLOCKSIZE - 1;
p.Y = p16 / MAP_BLOCKSIZE;
p16 &= MAP_BLOCKSIZE - 1;
p.X = p16;
if(m_data.find(p) != m_data.end())
{

12
src/nodetimer.cpp
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@ -96,12 +96,12 @@ void NodeTimerList::deSerialize(std::istream &is, u8 map_format_version)
{
u16 p16 = readU16(is);
v3s16 p(0,0,0);
p.Z += p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
p16 -= p.Z * MAP_BLOCKSIZE * MAP_BLOCKSIZE;
p.Y += p16 / MAP_BLOCKSIZE;
p16 -= p.Y * MAP_BLOCKSIZE;
p.X += p16;
v3s16 p;
p.Z = p16 / MAP_BLOCKSIZE / MAP_BLOCKSIZE;
p16 &= MAP_BLOCKSIZE * MAP_BLOCKSIZE - 1;
p.Y = p16 / MAP_BLOCKSIZE;
p16 &= MAP_BLOCKSIZE - 1;
p.X = p16;
NodeTimer t;
t.deSerialize(is);

32
src/staticobject.cpp
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@ -22,42 +22,31 @@ with this program; if not, write to the Free Software Foundation, Inc.,
void StaticObject::serialize(std::ostream &os)
{
char buf[12];
// type
buf[0] = type;
os.write(buf, 1);
writeU8(os, type);
// pos
writeV3S32((u8*)buf, v3s32(pos.X*1000,pos.Y*1000,pos.Z*1000));
os.write(buf, 12);
writeV3F1000(os, pos);
// data
os<<serializeString(data);
}
void StaticObject::deSerialize(std::istream &is, u8 version)
{
char buf[12];
// type
is.read(buf, 1);
type = buf[0];
type = readU8(is);
// pos
is.read(buf, 12);
v3s32 intp = readV3S32((u8*)buf);
pos.X = (f32)intp.X/1000;
pos.Y = (f32)intp.Y/1000;
pos.Z = (f32)intp.Z/1000;
pos = readV3F1000(is);
// data
data = deSerializeString(is);
}
void StaticObjectList::serialize(std::ostream &os)
{
char buf[12];
// version
buf[0] = 0;
os.write(buf, 1);
u8 version = 0;
writeU8(os, version);
// count
u16 count = m_stored.size() + m_active.size();
writeU16((u8*)buf, count);
os.write(buf, 2);
writeU16(os, count);
for(std::list<StaticObject>::iterator
i = m_stored.begin();
i != m_stored.end(); ++i)
@ -75,13 +64,10 @@ void StaticObjectList::serialize(std::ostream &os)
}
void StaticObjectList::deSerialize(std::istream &is)
{
char buf[12];
// version
is.read(buf, 1);
u8 version = buf[0];
u8 version = readU8(is);
// count
is.read(buf, 2);
u16 count = readU16((u8*)buf);
u16 count = readU16(is);
for(u16 i=0; i<count; i++)
{
StaticObject s_obj;

12
src/util/serialize.cpp
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@ -68,11 +68,11 @@ std::string deSerializeString(std::istream &is)
if(is.gcount() != 2)
throw SerializationError("deSerializeString: size not read");
u16 s_size = readU16((u8*)buf);
std::string s;
if(s_size == 0)
return "";
return s;
Buffer<char> buf2(s_size);
is.read(&buf2[0], s_size);
std::string s;
s.reserve(s_size);
s.append(&buf2[0], s_size);
return s;
@ -86,9 +86,9 @@ std::wstring deSerializeWideString(std::istream &is)
if(is.gcount() != 2)
throw SerializationError("deSerializeString: size not read");
u16 s_size = readU16((u8*)buf);
if(s_size == 0)
return L"";
std::wstring s;
if(s_size == 0)
return s;
s.reserve(s_size);
for(u32 i=0; i<s_size; i++)
{
@ -118,11 +118,11 @@ std::string deSerializeLongString(std::istream &is)
if(is.gcount() != 4)
throw SerializationError("deSerializeLongString: size not read");
u32 s_size = readU32((u8*)buf);
std::string s;
if(s_size == 0)
return "";
return s;
Buffer<char> buf2(s_size);
is.read(&buf2[0], s_size);
std::string s;
s.reserve(s_size);
s.append(&buf2[0], s_size);
return s;

124
src/util/serialize.h
View File

@ -21,9 +21,63 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#define UTIL_SERIALIZE_HEADER
#include "../irrlichttypes_bloated.h"
#include "config.h"
#if HAVE_ENDIAN_H
#include <endian.h>
#include <string.h> // for memcpy
#endif
#include <iostream>
#include <string>
#define FIXEDPOINT_FACTOR 1000.0f
#define FIXEDPOINT_INVFACTOR (1.0f/FIXEDPOINT_FACTOR)
#if HAVE_ENDIAN_H
// use machine native byte swapping routines
// Note: memcpy below is optimized out by modern compilers
inline void writeU64(u8* data, u64 i)
{
u64 val = htobe64(i);
memcpy(data, &val, 8);
}
inline void writeU32(u8* data, u32 i)
{
u32 val = htobe32(i);
memcpy(data, &val, 4);
}
inline void writeU16(u8* data, u16 i)
{
u16 val = htobe16(i);
memcpy(data, &val, 2);
}
inline u64 readU64(const u8* data)
{
u64 val;
memcpy(&val, data, 8);
return be64toh(val);
}
inline u32 readU32(const u8* data)
{
u32 val;
memcpy(&val, data, 4);
return be32toh(val);
}
inline u16 readU16(const u8* data)
{
u16 val;
memcpy(&val, data, 2);
return be16toh(val);
}
#else
// generic byte-swapping implementation
inline void writeU64(u8 *data, u64 i)
{
data[0] = ((i>>56)&0xff);
@ -50,11 +104,6 @@ inline void writeU16(u8 *data, u16 i)
data[1] = ((i>> 0)&0xff);
}
inline void writeU8(u8 *data, u8 i)
{
data[0] = ((i>> 0)&0xff);
}
inline u64 readU64(const u8 *data)
{
return ((u64)data[0]<<56) | ((u64)data[1]<<48)
@ -73,6 +122,13 @@ inline u16 readU16(const u8 *data)
return (data[0]<<8) | (data[1]<<0);
}
#endif
inline void writeU8(u8 *data, u8 i)
{
data[0] = ((i>> 0)&0xff);
}
inline u8 readU8(const u8 *data)
{
return (data[0]<<0);
@ -100,10 +156,10 @@ inline s8 readS8(const u8 *data){
}
inline void writeF1000(u8 *data, f32 i){
writeS32(data, i*1000);
writeS32(data, i*FIXEDPOINT_FACTOR);
}
inline f32 readF1000(const u8 *data){
return (f32)readS32(data)/1000.;
return (f32)readS32(data)*FIXEDPOINT_INVFACTOR;
}
inline void writeV3S32(u8 *data, v3s32 p)
@ -195,20 +251,12 @@ inline v3s16 readV3S16(const u8 *data)
inline void writeARGB8(u8 *data, video::SColor p)
{
writeU8(&data[0], p.getAlpha());
writeU8(&data[1], p.getRed());
writeU8(&data[2], p.getGreen());
writeU8(&data[3], p.getBlue());
writeU32(data, p.color);
}
inline video::SColor readARGB8(const u8 *data)
{
video::SColor p(
readU8(&data[0]),
readU8(&data[1]),
readU8(&data[2]),
readU8(&data[3])
);
video::SColor p(readU32(data));
return p;
}
@ -218,7 +266,7 @@ inline video::SColor readARGB8(const u8 *data)
inline void writeU8(std::ostream &os, u8 p)
{
char buf[1] = {0};
char buf[1];
writeU8((u8*)buf, p);
os.write(buf, 1);
}
@ -231,7 +279,7 @@ inline u8 readU8(std::istream &is)
inline void writeU16(std::ostream &os, u16 p)
{
char buf[2] = {0};
char buf[2];
writeU16((u8*)buf, p);
os.write(buf, 2);
}
@ -244,7 +292,7 @@ inline u16 readU16(std::istream &is)
inline void writeU32(std::ostream &os, u32 p)
{
char buf[4] = {0};
char buf[4];
writeU32((u8*)buf, p);
os.write(buf, 4);
}
@ -257,46 +305,34 @@ inline u32 readU32(std::istream &is)
inline void writeS32(std::ostream &os, s32 p)
{
char buf[4] = {0};
writeS32((u8*)buf, p);
os.write(buf, 4);
writeU32(os, (u32) p);
}
inline s32 readS32(std::istream &is)
{
char buf[4] = {0};
is.read(buf, 4);
return readS32((u8*)buf);
return (s32)readU32(is);
}
inline void writeS16(std::ostream &os, s16 p)
{
char buf[2] = {0};
writeS16((u8*)buf, p);
os.write(buf, 2);
writeU16(os, (u16) p);
}
inline s16 readS16(std::istream &is)
{
char buf[2] = {0};
is.read(buf, 2);
return readS16((u8*)buf);
return (s16)readU16(is);
}
inline void writeS8(std::ostream &os, s8 p)
{
char buf[1] = {0};
writeS8((u8*)buf, p);
os.write(buf, 1);
writeU8(os, (u8) p);
}
inline s8 readS8(std::istream &is)
{
char buf[1] = {0};
is.read(buf, 1);
return readS8((u8*)buf);
return (s8)readU8(is);
}
inline void writeF1000(std::ostream &os, f32 p)
{
char buf[4] = {0};
char buf[4];
writeF1000((u8*)buf, p);
os.write(buf, 4);
}
@ -322,7 +358,7 @@ inline v3f readV3F1000(std::istream &is)
inline void writeV2F1000(std::ostream &os, v2f p)
{
char buf[8] = {0};
char buf[8];
writeV2F1000((u8*)buf, p);
os.write(buf, 8);
}
@ -335,7 +371,7 @@ inline v2f readV2F1000(std::istream &is)
inline void writeV2S16(std::ostream &os, v2s16 p)
{
char buf[4] = {0};
char buf[4];
writeV2S16((u8*)buf, p);
os.write(buf, 4);
}
@ -348,7 +384,7 @@ inline v2s16 readV2S16(std::istream &is)
inline void writeV2S32(std::ostream &os, v2s32 p)
{
char buf[8] = {0};
char buf[8];
writeV2S32((u8*)buf, p);
os.write(buf, 8);
}
@ -361,7 +397,7 @@ inline v2s32 readV2S32(std::istream &is)
inline void writeV3S16(std::ostream &os, v3s16 p)
{
char buf[6] = {0};
char buf[6];
writeV3S16((u8*)buf, p);
os.write(buf, 6);
}
@ -374,7 +410,7 @@ inline v3s16 readV3S16(std::istream &is)
inline void writeARGB8(std::ostream &os, video::SColor p)
{
char buf[4] = {0};
char buf[4];
writeARGB8((u8*)buf, p);
os.write(buf, 4);
}