前置准备

安装visual studio
安装cmake

编译zlib

下载zlib的源代码，并解压
运行cmake。source code打开zlib-1.2.11/，build binaries选择zlib-1.2.11/cmake/build。这里默认会生成visualstudio工程，位于build目录下。打开工程，编译install项目，则会把zlib的include和lib等复制到C:\Program files(x86)/zlib下。
点击cmake的Configure，Generate。
进入build目录，visual studio打开zlib.sln。选择想要的编译目标（如release，x64），编译ALL_BUILD和INSTALL。这里projectzlib的编译结果是动态库，包含lib和dll。
查看C:\Program files(x86)/zlib下，已有include，lib，bin等。其下已包含若干h，lib，dll文件。

写一个zlib的demo

visual studio新建project。
project的属性里VC++目录的包含目录添加C:\Program Files (x86)\zlib\include，链接器的常规的附加库目录添加C:\Program Files (x86)\zlib\lib。输入的附加依赖项添加zlib.lib。
project添加cpp文件：

#include <zlib.h>
#include <array>
#include <memory>
using namespace std;int main() {const size_t lenSrc = 60000;array<unsigned char, lenSrc> src = { 0 };uLong lenDest = compressBound(lenSrc);unique_ptr<Bytef[]> des = make_unique<Bytef[]>(lenDest);int retCompress = compress2(des.get(), &lenDest, src.data(), lenSrc, Z_BEST_COMPRESSION);switch (retCompress) {case Z_OK:printf("lenDest=%d\n", lenDest);break;case Z_MEM_ERROR:case Z_BUF_ERROR:throw retCompress;break;default:throw retCompress;}uLong lenDest2 = 65535;unique_ptr<Bytef[]> des2 = make_unique<Bytef[]>(lenDest2);retCompress = uncompress(des2.get(), &lenDest2, des.get(), lenDest);switch (retCompress) {case Z_OK:printf("actual size of the uncompressed data=%d\n", lenDest2);break;case Z_MEM_ERROR:throw "there was not enough memory";break;case Z_BUF_ERROR:throw "there was not enough room in the output buffer";break;case Z_DATA_ERROR:throw "the input data was corrupted or incomplete";break;default:throw retCompress;}return 0;
}

编译
运行时，还缺zlib.dll。可将dll放到exe同级目录下。或者把zlib.dll所在目录加入PATH。

编译protobuf

下载protobuf的cpp源码，如protobuf-cpp-3.13.0.tar.gz。再解压
运行cmake。source code打开protobuf-3.12.4/cmake，build binaries选择protobuf-3.12.4/cmake/build。这里默认会生成visualstudio工程，位于build目录下。简单起见，就勾选protobuf_BUILD_PROTOC_BINARIES。打开工程，编译install项目，则会把protobuf的include和lib等复制到C:\Program files(x86)/protobuf下。
点击cmake的Configure，Generate。
进入build目录，visual studio打开protobuf.sln。选择想要的编译目标（如release，x64），编译ALL_BUILD和INSTALL。这里projectlibprotobuf的编译结果是静态库，仅lib。
查看C:\Program files(x86)/zlib下，已有include，lib，bin等。其下已包含若干h，lib，exe文件。
bin下protoc.exe是protobuf的预编译器。通过它，我们能把proto文件编译为h和cpp文件。

写一个demo

新建specprinter.proto文件，随便写点东西。

syntax = "proto3";enum PathFreq {HKLM=0;HKCU=1;HKCR=2;HKU=3;HKCC=4;MODEL=5;PRINTERNAME=6;//SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\PrintersSMWCP=7;resevered8=8;resevered9=9;resevered10=10;resevered11=11;resevered12=12;resevered13=13;resevered14=14;resevered15=15;resevered16=16;
}message MsgPathUnit {oneof PathUnit {PathFreq freq = 1;string normal = 2;};
}message Path {repeated MsgPathUnit unit=1;}message MapPath {map<uint32, Path> Config=1;}message Paths {repeated uint32 p = 1;}message MapConfig {map<string, Paths> Config = 1;}message SpecConfig {string s = 1; MapPath mappath = 2;MapConfig mapconfig = 3;
}

cmd里使用protoc，编译specprinter.proto
protoc.exe specprinter.proto --cpp_out=.
随后，能看到specprinter.pb.h和specprinter.pb.cc
新建visual studio工程protobufdemo.project。将h和cc加入工程。将c:\program files(x86)\protobuf的include和lib加入工程的对应搜索路径。
main.cpp里写下如下代码：

#include <iostream>
#include <memory>
#include <fstream>
#include <sstream>
#include <zlib.h>
#include "specprinter.pb.h"
using namespace std;int main()
{PathFreq pathfreq0, p1, p2, p3, p4, p5, p6, p7, p8, p9;{pathfreq0 = PathFreq::HKLM;p1 = PathFreq::HKCU;p2 = PathFreq::HKCR;p3 = PathFreq::HKU;p4 = PathFreq::HKCC;p5 = PathFreq::MODEL;p6 = PathFreq::PRINTERNAME;p7 = PathFreq::SMWCP;p8 = PathFreq::resevered8;p9 = PathFreq::resevered9;}Path pa0, pa1, pa2, pa3, pa4, pa5, pa6, pa7, pa8, pa9, pa10, pa11, pa12, pa13, pa14, pa15, pa16, pa17;{pa0.add_unit()->set_freq(pathfreq0);pa0.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa0.add_unit()->set_freq(p5);pa0.add_unit()->set_freq(p6);pa0.add_unit()->set_normal("ChangeID");pa1.add_unit()->set_freq(p1);pa1.add_unit()->set_normal("SOFTRE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa1.add_unit()->set_freq(p5);pa1.add_unit()->set_freq(p6);pa1.add_unit()->set_normal("Status");pa2.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa2.add_unit()->set_freq(p5);pa2.add_unit()->set_freq(p6); pa2.add_unit()->set_normal("DsKeyUpdateForeground");pa3.add_unit()->set_freq(p3);pa3.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa3.add_unit()->set_freq(p5);pa3.add_unit()->set_freq(p6);pa3.add_unit()->set_normal("Default DevMode");pa4.add_unit()->set_freq(p4);pa4.add_unit()->set_freq(p3);pa4.add_unit()->set_normal("SOFTWARE\\Micrsoft\\idows NT\\CurretVersion\\Print\\Pinters");pa4.add_unit()->set_freq(p5);pa4.add_unit()->set_freq(p6);pa5.add_unit()->set_normal("pa4");pa5.add_unit()->set_freq(p3);pa4.add_unit()->set_normal("SOFTWARE\\Micrsoft\\idows NT\\CurretVersion\\Print\\Pinters");pa5.add_unit()->set_freq(p5);pa5.add_unit()->set_freq(p6);pa6.add_unit()->set_freq(p6);pa5.add_unit()->set_freq(p3);pa4.add_unit()->set_normal("SFTWARE\\Micrsft\\idows NT\\CurtVersion\\Print\\Pinters");pa5.add_unit()->set_freq(p5);pa6.add_unit()->set_freq(p6);pa6.add_unit()->set_freq(p3);pa6.add_unit()->set_normal("SOFTWARE\\Micrsoft\\idows NT\\CurretVersion\\Print\\Pinters");pa6.add_unit()->set_freq(p5);pa6.add_unit()->set_freq(p6);pa7.add_unit()->set_freq(p7);pa7.add_unit()->set_freq(p7);pa7.add_unit()->set_normal("SOFTWARE\\Micrsoft\\idows NT\\Curretersion\\Prit\\Pers");pa7.add_unit()->set_freq(p7);pa8.add_unit()->set_freq(p8);pa8.add_unit()->set_freq(p7);pa8.add_unit()->set_normal("SOFTARE\\Micrsoft\\idows NT\\Curretersion\\Prit\\Pers");pa8.add_unit()->set_freq(p8);pa9.add_unit()->set_freq(p9);pa9.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa9.add_unit()->set_freq(p5);pa9.add_unit()->set_freq(p6);pa9.add_unit()->set_normal("ChangeID");pa10.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa10.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa10.add_unit()->set_freq(p5);pa10.add_unit()->set_freq(p6);pa10.add_unit()->set_normal("ChangID");pa11.add_unit()->set_normal("SOFTWAR\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa12.add_unit()->set_normal("SOFTWARE\\Micosoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa12.add_unit()->set_freq(p5);pa12.add_unit()->set_freq(p6);pa12.add_unit()->set_normal("ChangD");pa12.add_unit()->set_normal("SOFTWARE\\icrosoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa13.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa13.add_unit()->set_freq(p5);pa13.add_unit()->set_freq(p6);pa13.add_unit()->set_normal("ChaID");pa13.add_unit()->set_normal("SOFTWARE\\Microsoft\\indows NT\\CurrentVersion\\Print\\Printers");pa14.add_unit()->set_normal("SOFTWARE\\Microsof\\indows NT\\urentVersion\\Print\\Printers");pa14.add_unit()->set_normal("SOFTWARE\\Microsoftndows NT\\CurrentVersion\\Print\\Printers");pa14.add_unit()->set_freq(p5);pa14.add_unit()->set_freq(p6);pa14.add_unit()->set_normal("ChaneID");pa15.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\rint\\Printers");pa15.add_unit()->set_normal("SOFTWARE\\Micsoft\\WindCurrentVersion\\Print\\Printers");pa15.add_unit()->set_freq(p5);pa15.add_unit()->set_freq(p6);pa15.add_unit()->set_normal("ChaID");pa16.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\rinters");pa16.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa16.add_unit()->set_freq(p5);pa16.add_unit()->set_freq(p6);pa16.add_unit()->set_normal("asdf322ChangeID");pa17.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printer");pa17.add_unit()->set_normal("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\Print\\Printers");pa17.add_unit()->set_freq(p5);pa17.add_unit()->set_freq(p6);pa17.add_unit()->set_normal("ChasdfadeeqngeID");}MapPath mappath;{mappath.mutable_config()->operator[](0) = pa0;mappath.mutable_config()->operator[](1) = pa1;mappath.mutable_config()->operator[](2) = pa2;mappath.mutable_config()->operator[](3) = pa3;mappath.mutable_config()->operator[](4) = pa4;mappath.mutable_config()->operator[](5) = pa5;mappath.mutable_config()->operator[](6) = pa6;mappath.mutable_config()->operator[](7) = pa7;mappath.mutable_config()->operator[](8) = pa8;mappath.mutable_config()->operator[](9) = pa9;mappath.mutable_config()->operator[](10) = pa10;mappath.mutable_config()->operator[](11) = pa11;mappath.mutable_config()->operator[](12) = pa12;mappath.mutable_config()->operator[](13) = pa13;mappath.mutable_config()->operator[](14) = pa14;mappath.mutable_config()->operator[](15) = pa15;mappath.mutable_config()->operator[](16) = pa16;mappath.mutable_config()->operator[](17) = pa17;}//std::string str = mappath.SerializeAsString();//printf("str.size=%zd\n", str.size());SpecConfig specconfig;specconfig.set_s("123");specconfig.set_allocated_mappath(&mappath);Paths ps0, ps1, ps2, ps3, ps4, ps5, ps6, ps7, ps8, ps9, ps10, ps11, ps12, ps13, ps14;{ps0.add_p(0); ps0.add_p(1); ps0.add_p(2); ps0.add_p(3); ps0.add_p(4); ps0.add_p(5);ps1.add_p(6); ps1.add_p(1); ps1.add_p(2); ps1.add_p(3); ps1.add_p(4); ps1.add_p(5);ps2.add_p(6); ps2.add_p(7); ps2.add_p(2); ps2.add_p(3); ps2.add_p(4); ps2.add_p(5);ps3.add_p(6); ps3.add_p(7); ps3.add_p(8); ps3.add_p(3); ps3.add_p(4); ps3.add_p(5);ps4.add_p(6); ps4.add_p(7); ps4.add_p(8); ps4.add_p(9); ps4.add_p(4); ps4.add_p(5);ps5.add_p(6); ps5.add_p(7); ps5.add_p(8); ps5.add_p(9); ps5.add_p(10); ps5.add_p(5);ps6.add_p(6); ps6.add_p(7); ps6.add_p(8); ps6.add_p(9); ps6.add_p(10); ps6.add_p(11);ps7.add_p(12); ps7.add_p(7); ps7.add_p(8); ps7.add_p(9); ps7.add_p(10); ps7.add_p(11);ps8.add_p(12); ps8.add_p(13); ps8.add_p(8); ps8.add_p(9); ps8.add_p(10); ps8.add_p(11);ps9.add_p(12); ps9.add_p(13); ps9.add_p(14); ps9.add_p(9); ps9.add_p(10); ps9.add_p(11);ps10.add_p(12); ps10.add_p(13); ps10.add_p(14); ps10.add_p(15); ps10.add_p(10); ps10.add_p(11);ps11.add_p(12); ps11.add_p(13); ps11.add_p(14); ps11.add_p(15); ps11.add_p(16); ps11.add_p(11);ps12.add_p(12); ps12.add_p(13); ps12.add_p(14); ps12.add_p(15); ps12.add_p(16); ps12.add_p(17);ps13.add_p(18); ps13.add_p(13); ps13.add_p(14); ps13.add_p(15); ps13.add_p(16); ps13.add_p(17);ps14.add_p(18); ps14.add_p(19); ps14.add_p(14); ps14.add_p(15); ps14.add_p(16); ps14.add_p(17);}MapConfig mapcfg;auto mc = mapcfg.mutable_config();(*mc)["hp color LaserJet Pro M452 PCL 6"] = ps0;(*mc)["HP LaserJet MFP M227-M231 PCL 6(V3)"] = ps1;(*mc)["DASCOM DS-1700"] = ps2;(*mc)["SNBC BTP-L2-BPLA"] = ps3;(*mc)["ZDesigner GK888t(EPL)"] = ps4;(*mc)["ASDFzewqqSDFdsfaCCVCQQ3#Q"] = ps5;(*mc)["wqr42342aswerqwecxzvsdfrtwrwrew"] = ps6;(*mc)["2asweraczvfgqew2 sarerw"] = ps7;(*mc)["zcvzwrqw wer2344 2q43q5dg as"] = ps8;(*mc)["artwert;;jqij4;qt f fs"] = ps9;(*mc)["f.l/xmv.tq;qawq4rp adf2"] = ps10;(*mc)["3242asrqw3q4t adfacvbc asd3"] = ps11;(*mc)["2qraszxcvnxcqewq42q asqw44"] = ps12;(*mc)["q4rqwerad442314323425551123"] = ps13;(*mc)["q4zafzvza1313412 rtwartewrt"] = ps14;//auto str2 = mapcfg.SerializeAsString();//printf("str2.size=%zd\n", str.size());specconfig.set_allocated_mapconfig(&mapcfg);auto str3 = specconfig.SerializeAsString();printf("str3.size=%zd\n", str3.size());specconfig.release_mappath();specconfig.release_mapconfig();//压缩spec_printer.conf主体uLongf compressedstr3sz = compressBound(str3.size());Bytef* compressedstr3 = (Bytef*)malloc(compressedstr3sz);int retCompress = compress2(compressedstr3, &compressedstr3sz, (const Bytef*)(str3.data()), str3.size(), Z_BEST_COMPRESSION);if (retCompress != Z_OK) {throw retCompress;}printf("compressedstr3sz=%d\n", compressedstr3sz);SpecConfig sc2;if (!sc2.ParseFromString(str3)) {throw 1;}MapConfig mapcfg2 = sc2.mapconfig();auto paths2 = mapcfg2.config().at("hp color LaserJet Pro M452 PCL 6");auto paths20 = paths2.p();MapPath mappath2 = sc2.mappath();for (auto it = paths20.cbegin(); it != paths20.cend(); ++it) {printf("pathid=%d\n", *it);Path pathtmp = mappath2.config().at(*it);auto sz = pathtmp.unit_size();printf("sz=%d\n", sz);for (int i = 0; i < sz; ++i) {auto pathunit = pathtmp.unit(i);if (pathunit.PathUnit_case() == MsgPathUnit::kFreq) {printf("\t%d\n", pathunit.freq());}else {printf("\t%s\n", pathunit.normal().c_str());}}}uLongf szDest = 2 * str3.size();Bytef* compressedDest = (Bytef*)malloc(szDest);if (compressedDest == NULL) {throw 2;}int err = compress2(compressedDest, &szDest, (const Bytef*)(str3.data()), str3.size(), Z_BEST_COMPRESSION);//int err = compress(compressedDest, &szDest, (const Bytef*)(str3.data()), str3.size());if (err != Z_OK) {printf("err=%d\n");}else {printf("szDest=%d\n", szDest);}#if 0//压缩超大detailifstream t("m452.default.json");stringstream buffer;buffer << t.rdbuf();std::string contents(buffer.str());printf("contents.size()=%d\n", contents.size());szDest = 2 * contents.size();Bytef *compressedDest3 = (Bytef*)malloc(szDest);compress2(compressedDest3, &szDest, (const Bytef*)(contents.data()), contents.size(), Z_BEST_COMPRESSION);printf("szDest=%d\n", szDest);t.close();t.open("m227.default.json");buffer.str("");buffer << t.rdbuf();contents = buffer.str();printf("contents.size()=%d\n", contents.size());szDest = 2 * contents.size();Bytef* compressedDest4 = (Bytef*)malloc(szDest);compress2(compressedDest4, &szDest, (const Bytef*)(contents.data()), contents.size(), Z_BEST_COMPRESSION);printf("szDest=%d\n", szDest);t.close();
#endifreturn 0;
}

在proto中，已定义message类型SpecConfig包含map类型成员MapConfig。这里可用specconfig.set_allocated_mapconfig(&mapcfg);赋值。但是如果mapcfg是局部变量，须尽快调用specconfig.release_mapconfig();。因为SpecConfig析构时会deletemapconfig_。mapconfig_恰好是局部变量的地址。因此，若不release，在SpecConfig析构时会崩溃。

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visualstudio下zlib和protobuf编译环境备忘

这里写自定义目录标题

前置准备

编译zlib

写一个zlib的demo

编译protobuf

写一个demo

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