c++ 操作配置文件学习笔记
目录
fstream读取txt
aaaa.h
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void loadClassList(string m_classfile);
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vector<std::string> m_classNames;
aaaa.cpp
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#include <fstream>
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void Detector::loadClassList(string m_classfile)
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{
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std::ifstream ifs(m_classfile);
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std::string line;
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while (getline(ifs, line))
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m_classNames.push_back(line);
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}
windows读取节点
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LPTSTR lpPath = new char[MAX_PATH];
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strcpy(lpPath, "D:\\IniFileName.ini");
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WritePrivateProfileString("LiMing", "Sex", "Man", lpPath);
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WritePrivateProfileString("LiMing", "Age", "20", lpPath);
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WritePrivateProfileString("Fangfang", "Sex", "Woman", lpPath);
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WritePrivateProfileString("Fangfang", "Age", "21", lpPath);
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delete [] lpPath;
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//INI文件如下:
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[LiMing]
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Sex=Man
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Age=20
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[Fangfang]
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Sex=Woman
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Age=21
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读INI文件:
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LPTSTR lpPath = new char[MAX_PATH];
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LPTSTR LiMingSex = new char[6];
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int LiMingAge;
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LPTSTR FangfangSex = new char[6];
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int FangfangAge;
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strcpy(lpPath, "..\\IniFileName.ini");
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GetPrivateProfileString("LiMing", "Sex", "", LiMingSex, 6, lpPath);
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LiMingAge = GetPrivateProfileInt("LiMing", "Age", 0, lpPath);
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GetPrivateProfileString("Fangfang", "Sex", "", FangfangSex, 6, lpPath);
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FangfangAge = GetPrivateProfileInt("Fangfang", "Age", 0, lpPath);
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delete [] lpPath;
GxxPropertyUtils 读取key/value
转自：C++读取配置文件_guoxuxing的博客-CSDN博客_c++ 读取配置文件
调用示例：
123.conf
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[LiMing]
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#server ip port
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server.ip=127.0.0.1
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server.port = 8080
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[test]
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name=asdf
这个好像只能读取key,value，不能读节点
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#include "GxxPropertyUtils.h"
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using namespace cv;
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int main(int argc, char* argv[]) {
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GxxPropertyUtils::ConfigFile* cf = GxxPropertyUtils::OpenConfigFile("d:\\123.conf");
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std::string servIp = GxxPropertyUtils::GetPropertyString(cf, "server.ip");
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cout << servIp << endl;
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servIp = GxxPropertyUtils::GetPropertyString(cf, "server.port");
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cout << servIp << endl;
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GxxPropertyUtils::Close(cf);
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}
GxxPropertyUtils.h
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#pragma once
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#include <string>
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namespace StringUtils {
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bool inline isBlank(char ch) {
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return ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n' || ch == '\0';
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}
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bool inline isBlank(wchar_t ch) {
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return ch == L' ' || ch == L'\t' || ch == L'\r' || ch == L'\n' || ch == '\0';
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}
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}
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namespace GxxPropertyUtils
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{
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struct ConfigFile;
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/**
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* 打开类似以下文件格式的配置文件
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* #server ip port
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* server.ip = 127.0.0.1
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* server.port = 8080
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*/
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ConfigFile* OpenConfigFile(const char* filepath, bool bReadonly = true);
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/**
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* 保存配置
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*/
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void Save(ConfigFile* cf);
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/**
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* 关闭配置, 如果配置有发生变化,则自动保存
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*/
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void Close(ConfigFile* cf);
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std::string GetPropertyString(ConfigFile* cf, const char* key, const char* defaultV = "");
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bool GetPropertyBool(ConfigFile* cf, const char* key, bool defaultV = false);
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int GetPropertyInteger(ConfigFile* cf, const char* key, int defaultV = 0);
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void WriteProperty(ConfigFile* cf, const char* key, const char* v);
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void WriteProperty(ConfigFile* cf, const char* key, bool v);
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void WriteProperty(ConfigFile* cf, const char* key, int v);
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}
GxxPropertyUtils.cpp
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#include "GxxPropertyUtils.h"
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#include <fstream>
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#include <vector>
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#include <map>
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#include <string>
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using namespace std;
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namespace GxxPropertyUtils {
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struct ConfigFileLine {
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short lineType; // 0:注释, 1:配置, 2:无效行
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string strLine;
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string strKey;
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string strValue;
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};
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struct ConfigFile {
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string filepath;
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bool readonly;
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bool modified;
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vector<ConfigFileLine> lines;
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map<string, int> mapV;
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};
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ConfigFile* OpenConfigFile(const char* filepath, bool bReadonly)
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{
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char buf[1025];
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int nLen;
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ConfigFile* pcf = new ConfigFile;
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try {
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pcf->filepath = filepath;
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pcf->readonly = bReadonly;
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pcf->modified = false;
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ifstream fd(filepath, ios_base::in | ios_base::_Nocreate);
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if (!fd.is_open())
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return pcf;
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while (!fd.eof()) {
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fd.getline(buf, 1024);
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nLen = strlen(buf);
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const char* pL = nullptr;
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const char* pLEnd = nullptr;
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const char* pR = nullptr;
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const char* p = buf;
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ConfigFileLine li;
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bool isComment = false;
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while (*p) {
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if (StringUtils::isBlank(*p)) {
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p++; continue;
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}
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if (*p == '#') {
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isComment = true; break;
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}
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pL = p;
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break;
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}
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if (isComment) {
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li.lineType = 0;
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li.strLine = buf;
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pcf->lines.push_back(li);
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continue;
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}
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if (pL == nullptr) {
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// 无效
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li.lineType = 2;
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li.strLine = buf;
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pcf->lines.push_back(li);
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continue;
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}
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while (*++p) {
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if (StringUtils::isBlank(*p) || *p == '=') {
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pLEnd = p;
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break;
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}
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}
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if (pLEnd == nullptr) {
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// 无效
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li.lineType = 2;
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li.strLine = buf;
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pcf->lines.push_back(li);
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continue;
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}
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while (*p) {
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if (*p == '=' || StringUtils::isBlank(*p)) {
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p++;
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continue;
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}
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pR = p;
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break;
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}
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if (pR == nullptr) {
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// 无效
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li.lineType = 2;
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li.strLine = buf;
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pcf->lines.push_back(li);
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continue;
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}
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p = buf + nLen;
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while (p != pR) {
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if (!StringUtils::isBlank(*p))
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break;
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--p;
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}
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li.lineType = 1;
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li.strLine = buf;
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li.strKey = string(pL, pLEnd - pL);
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li.strValue = string(pR, p - pR + 1);
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pcf->lines.push_back(li);
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pcf->mapV[li.strKey] = (int)pcf->lines.size() - 1;
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}
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fd.close();
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}
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catch (...) {
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delete pcf;
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return nullptr;
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}
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return pcf;
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}
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void Save(ConfigFile* cf)
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{
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if (!cf->readonly && cf->modified) {
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try {
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ofstream o(cf->filepath, ios_base::out);
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for (auto it = cf->lines.begin(); it != cf->lines.end(); ++it) {
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o << it->strLine << endl;
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}
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o.close();
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}
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catch (...) {
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}
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}
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}
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void Close(ConfigFile* cf)
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{
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Save(cf);
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delete cf;
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}
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std::string GetPropertyString(ConfigFile* cf, const char* key, const char* defaultV/*=""*/)
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{
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auto it = cf->mapV.find(string(key));
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if (it == cf->mapV.end())
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return string(defaultV);
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return cf->lines[it->second].strValue;
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}
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bool GetPropertyBool(ConfigFile* cf, const char* key, bool defaultV /*= false*/)
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{
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auto it = cf->mapV.find(string(key));
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if (it == cf->mapV.end())
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return defaultV;
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const string& v = cf->lines[it->second].strValue;
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if (v == "true")
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return true;
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return false;
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}
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int GetPropertyInteger(ConfigFile* cf, const char* key, int defaultV /*= 0*/)
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{
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auto it = cf->mapV.find(string(key));
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if (it == cf->mapV.end())
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return defaultV;
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const string& v = cf->lines[it->second].strValue;
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return atoi(v.c_str());
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}
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void WriteProperty(ConfigFile* cf, const char* key, const char* v)
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{
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string sKey(key);
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auto it = cf->mapV.find(sKey);
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if (it == cf->mapV.end()) {
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ConfigFileLine li;
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li.lineType = 1;
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li.strKey = key;
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li.strValue = (v == nullptr ? "" : v);
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li.strLine.append(li.strKey);
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li.strLine.append(" = ");
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li.strLine.append(li.strValue);
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cf->lines.push_back(li);
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cf->mapV[sKey] = cf->lines.size() - 1;
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}
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else {
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auto& li = cf->lines[it->second];
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li.strLine = li.strKey;
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li.strValue = (v == nullptr ? "" : v);
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li.strLine.append(" = ");
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li.strLine.append(li.strValue);
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}
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cf->modified = true;
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}
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void WriteProperty(ConfigFile* cf, const char* key, bool v)
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{
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WriteProperty(cf, key, v ? "true" : "false");
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}
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void WriteProperty(ConfigFile* cf, const char* key, int v)
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{
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char buf[12] = { 0 };
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_itoa_s(v, buf, 10);
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WriteProperty(cf, key, buf);
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}
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}
在Windows的VC下
转自：https://www.jb51.net/article/192023.htm
读ini文件
例如：在D:\test.ini文件中
[Font]
name=宋体
size= 12pt
color = RGB(255,0,0)
上面的=号两边可以加空格，也可以不加
用GetPrivateProfileInt（）和GetPrivateProfileString（）
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例子：
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写ini文件
WritePrivateProfileString函数，没有写integer的，可以转成string再写入。
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WritePrivateProfileString：
Remarks
If the lpFileName parameter does not contain a full path and file name for the file, WritePrivateProfileString searches the Windows directory for the file. If the file does not exist, this function creates the file in the Windows directory.
If lpFileName contains a full path and file name and the file does not exist, WritePrivateProfileString creates the file. The specified directory must already exist.
WritePrivateProfileSection：
Remarks
The data in the buffer pointed to by the lpString parameter consists of one or more null-terminated strings, followed by a final null character. Each string has the following form:
key=string
The WritePrivateProfileSection function is not case-sensitive; the string pointed to by the lpAppName parameter can be a combination of uppercase and lowercase letters.
If no section name matches the string pointed to by the lpAppName parameter, WritePrivateProfileSection creates the section at the end of the specified initialization file and initializes the new section with the specified key name and value pairs.
WritePrivateProfileSection deletes the existing keys and values for the named section and inserts the key names and values in the buffer pointed to by the lpString parameter. The function does not attempt to correlate old and new key names; if the new names appear in a different order from the old names, any comments associated with preexisting keys and values in the initialization file will probably be associated with incorrect keys and values.
This operation is atomic; no operations that read from or write to the specified initialization file are allowed while the information is being written.
例子：
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自己封装的函数：
获取某一个Section的所有 key=value
map<CString, CString> GetKeysValues(LPCTSTR szSection, LPCTSTR szIniFilePath)
获取ini文件的所有Section名
vector<CString> GetSectionsNames(LPCTSTR szIniFilePath)
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。
文章来源: blog.csdn.net，作者：AI视觉网奇，版权归原作者所有，如需转载，请联系作者。
原文链接：blog.csdn.net/jacke121/article/details/125196031
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