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C++解析ini文件的实现方法

开发者 https://www.devze.com 2024-08-14 13:05 出处:网络 作者: 长弓聊编程
目录一.什么是ini文件二.ini文件的格式一般是什么样的1.节2.参数3.注释三.C++实现ini文件的解析四.其他这篇文章简单讨论一下ini文件。
目录
  • 一.什么是ini文件
  • 二.ini文件的格式一般是什么样的
    • 1.节
    • 2.参数
    • 3.注释
  • 三.C++实现ini文件的解析
    • 四.其他

      这篇文章简单讨论一下ini文件。

      一.什么是ini文件

      ini文件其实就是一种配置文件,常见于Windows的系统配置文件,当然也可以是其他用途,你的用法你说了算。

      二.ini文件的格式一般是什么样的

      看个例子

      ;这是注释
      [section1]
      key1=value1
      key2=value2
      [section2]
      key3=value3
      key4=value4
      

      ini文件包括节(section)、键值对(通常称为参数,parameter)和注释(comment)。

      1.节

      1.每一个section包含若干个parameter。

      2.每一个section独占一行,名称由[]包围,比如[sectionName]。

      3.每一个section的生效范围,从当前section开始到下一个section的开始(或者文件结尾),这其中所有的parameter都属于这个section。

      4.section不应该重复。

      2.参数

      1.parameter以键值对的形式存在,比如key=value。

      2.同一个section中的parameter不应该重复。

      3.注释

      1.注释用;表示。

      2.注释独占一行。

      三.C++实现ini文件的解析

      重点来了,这里展示一种C++解析ini文件的简易代码写法,主要是描述一种解析的思维,大致测试过了。

      直接看代码

      //inifile.h
      
      #ifndef pBmTjGSyINIFILE_H
      #define INIFILE_H
      
      #include <IOStream>
      #include <string>
      
      #define ERR_MES_1 "输入值不合法"
      #define ERR_MES_2 "打开文件失败"
      #define ERR_MES_3 "配置项不存在"
      
      const char TYPE_NULL = '0';
      const char TYPE_SECTION = '1';
      const char TYPE_PARAMETER = '2';
      const char TYPE_COMMENT = '3';
      
      typedef struct  IniNode
      {
      	char m_Type;
      	std::string m_Text;
      	IniNode* m_pPrev;
      	IniNode* m_pNext;
      
      }IniNode, * pIniNode;
      
      typedef struct IniSec
      {
      	pIniNode m_pSection;
      	pIniNode m_pParameter;
      	std::string m_SectionText;
      	std::string m_ParameterText;
      }IniSec, * pIniSec;
      
      class IniFile
      {
      public:
      	IniFile();
      	~IniFile();
      	bool ReadIniFile(const char* FilePathName);
      	bool WriteIniFile(const char* FilePathName);
      	bool WriteParameter(const char* Section, const char* Key, const char* Value);
      	bool WriteParameter(const char* Section, const char* Key, const bool Value);
      	bool WriteParameter(const char* Section, const char* Key, const int Value);
      	bool WriteParameter(const char* Section, const char* Key, const double Value);
      	std::string ReadParameter(const char* Section, const char* Key, const char* Default);
      	bool ReadParameter(const char* Section, const char* Key, const bool Default);
      	int ReadParameter(const char* Section, const char* Key, const int Default);
      	double ReadParameter(const char* Section, const char* Key, const double Default);
      	bool DeleteParameter(const char* Section, const char* Key);
      	bool DeleteSection(const char* Section);
      	int GetErrCode();
      	std::string GetErrMes();
      
      protected:
      	void FreeIniList();
      	void CreateIniNode();
      	void Trim(char* Buffer);
      	pIniNode FindSection(const char* Section);
      	pIniSec FindParameter(const char* Section, const char* Key);
      	void AddIniNode(char Type, const char* Text);
      	bool WriteParameterPublic(const char* Section, const char* Key, const char* Value);
      	std::string ReadParameterPublic(const char* Section, const char* Key, const char* Default);
      
      private:
      	FILE* m_pIniFileHandle;
      	pIniNode m_pIniList;
      	pIniNode m_pCurIniNode;
      	int m_LastErrCode;
      	std::string m_LastErrMes;
      };
      
      #endif // !INIFILE_H
      
      //inifile.cpp
      
      #include "inifile.h"
      
      IniFile::IniFile()
      {
      	m_LastErrCode = 0;
      	m_LastErrMes = "";
      	m_pCurIniNode = nullptr;
      	m_pIniFileHandle = nullptr;
      	m_pIniList = nullptr;
      }
      
      IniFile::~IniFile()
      {
      	FreeIniList();
      	fclose(m_pIniFileHandle);
      }
      
      int IniFile::GetErrCode()
      {
      	return m_LastErrCode;
      }
      
      std::string IniFile::GetErrMes()
      {
      	return m_LastErrMes;
      }
      
      bool IniFile::ReadIniFile(const char* FilePathName)
      {
      	if (!strcmp(FilePathName, ""))
      	{
      		m_LastErrCode = 1;
      		m_LastErrMes = ERR_MES_1;
      		return false;
      	}
      	if (!(m_pIniFileHandle = fopen(FilePathName, "r")))
      	{
      		m_LastErrCode = 2;
      		m_LastErrMes = ERR_MES_2;
      		return false;
      	}
      	FreeIniList();
      	char filebuf[256] = { 0 };
      	char* pchr = nullptr;
      	while (fgets(filebuf, 256, m_pIniFileHandle))
      	{
      		Trim(filebuf);
      		CreateIniNode();
      
      		if (';' == filebuf[0])
      		{
      			m_pCurIniNode->m_Type = TYPE_COMMENT;
      		}
      		else if ('[' == filebuf[0] && strchr(filebuf, ']'))
      		{
      			m_pCurIniNode->m_Type = TYPE_SECTION;
      
      		}
      		else if (strchr(filebuf, '='))
      		{
      			m_pCurIniNode->m_Type = TYPE_PARAMETER;
      
      		}
      		else
      		{
      			m_pCurIniNode->m_Type = TYPE_NULL;
      		}
      		m_pCurIniNode->m_Text = filebuf;
      	}
      
      	fclose(m_pIniFileHandle);
      	return true;
      }
      
      bool IniFile::WriteIniFile(const char* FilePathName)
      {
      	if (!strcmp(FilePathName, ""))
      	{
      		m_LastErrCode = 1;
      		m_LastErrMes = ERR_MES_1;
      		return false;
      	}
      	char FilePathNameBAT[256] = { 0 };
      	strcpy(FilePathNameBat, FilePathName);
      	strcat(FilePathNameBat, ".bak");
      	FILE* FileIniTemp = fopen(FilePathName, "r");
      	FILE* FileBatTemp = fopen(FilePathNameBat, "w");
      	if (!FileIniTemp || !FileBatTemp)
      	{
      		m_LastErrCode = 2;
      		m_LastErrMes = ERR_MES_2;
      		return false;
      	}
      	char FileStr[256] = { 0 };
      	while (fgets(FileStr, 256, FileIniTemp))
      	{
      		fprintf(FileBatTemp, "%s", FileStr);
      	}
      	fclose(FileIniTemp);
      	fclose(FileBatTemp);
      
      	if (!(m_pIniFileHandle = fopen(FilePathName, "w")))
      	{
      		m_LastErrCode = 2;
      		m_LastErrMes = ERR_MES_2;
      		return false;
      	}
      	m_pCurIniNode = m_pIniList;
      
      	while (m_pCurIniNode)
      	{
      		fprintf(m_pIniFileHandle, "%s\n", m_pCurIniNode->m_Text.data());
      		m_pCurIniNode = m_pCurIniNode->m_pNext;
      	}
      
      	fclose(m_pIniFileHandle);
      	return true;
      }
      
      bool IniFile::WriteParameter(const char* Section, const char* Key, const char* Value)
      {
      	return WriteParameterPublic(Section, Key, Value);
      }
      
      bool IniFile::WriteParameter(const char* Section, const char* Key, const bool Value)
      {
      	char StrValue[256] = { 0 };
      	itoa(Value, StrValue, 2);
      	return WriteParameterPublic(Section, Key, StrValue);
      }
      
      bool IniFile::WriteParameter(const char* Section, const char* Key, const int Value)
      {
      	char StrValue[256] = { 0 };
      	itoa(Value, StrValue, 10);
      	return WriteParameterPublic(Section, Key, StrValue);
      }
      
      bool IniFile::WriteParameter(const char* Section, const char* Key, const double Value)
      {
      	char StrValue[256] = { 0 };
      	sprintf_s(StrValue, "%f", Value);
      	return WriteParameterPublic(Section, Key, StrValue);
      }
      
      std::string IniFile::ReadParameter(const char* Section, const char* Key, const char* Default)
      {
      	return ReadParameterPublic(Section, Key, Default);
      }
      
      bool IniFile::ReadParameter(const char* Section, const char* Key, const bool Default)
      {
      	char DefaultString[2] = { 0 };
      	if (Default)
      	{
      		DefaultString[0] = '1';
      	}
      	else
      	{
      		DefaultString[0] = '0';
      	}
      	std::string RetStr = ReadParameterPublic(Section, Key, DefaultString);
      	return atoi(RetStr.data());
      }
      
      int IniFile::ReadParameter(const char* Section, const char* Key, const int Default)
      {
      	char DefaultString[256] = { 0 };
      	itoa(Default, DefaultString, 10);
      	std::string RetStr = ReadParameterPublic(Section, Key, DefaultString);
      	return atoi(RetStr.data());
      }
      
      double IniFile::ReadParameter(const char* Section, const char* Key, const double Default)
      {
      	char DefaultString[256] = { 0 };
      	sprintf_s(DefaultString, "%f", Default);
      	std::string RetStr = ReadParameterPublic(Section, Key, DefaultString);
      	return atof(RetStr.data());
      }
      
      bool IniFile::DeleteParameter(const char* Section, const char* Key)
      {
      	if (!strcmp(Section, "") || !strcmp(Key, ""))
      	{
      		m_LastErrCode = 1;
      		m_LastErrMes = ERR_MES_1;
      		return false;
      	}
      	pIniSec pIniSecTemp = FindParameter(Section, Key);
      	if (!pIniSecTemp)
      	{
      		m_LastErrCode = 3;
      		m_LastErrMes = ERR_MES_3;
      		return false;
      	}
      	m_pCurIniNode = pIniSecTemp->m_pParameter;
      	m_pCurIniNode->mpython_pPrev->m_pNext = m_pCurIniNode->m_pNext;
      	if (m_pCurIniNode->m_pNext)
      	{
      		m_pCurIniNode->m_pNext->m_pPrev = m_pCurIniNode->m_pPrev;
      	}
      
      	delete m_pCurIniNode;
      	delete pIniSecTemp;
      	return true;
      }
      
      bool IniFile::DeleteSection(const char* Section)
      {
      	if (!strcmp(Section, ""))
      	{
      		m_LastErrCode = 1;
      		m_LastErrMes = ERR_MES_1;
      		return false;
      	}
      	pIniNode pSectionIniNodeTemp = FindSection(Section);
      	if (!pSectionIniNodeTemp)
      	{
      		m_LastErrCode = 3;
      		m_LastErrMes = ERR_MES_3;
      		return false;
      	}
      	pIniNode pCurNextIniNode = nullptr;
      	m_pCurIniNode = pSectionIniNodeTemp->m_pNext;
      	while (m_pCurIniNode && m_pCurIniNode->m_Type == TYPE_PARAMETER)
      	{
      		pCurNextIniNode = m_pCurIniNode->m_pNext;
      		m_pCurIniNode->m_pPrev->m_pNext = m_pCurIniNode->m_pNext;
      		if (m_pCurIniNode->m_pNext)
      		{
      			m_pCurIniNode->m_pNext->m_pPrev = m_pCurIniNode->m_pPrev;
      		}
      		delete m_pCurIniNode;
      		m_pCurIniNode = pCurNextIniNode;
      	}
      	m_pCurIniNode = pSectionIniNodeTemp;
      	m_pCurIniNode->m_pPrev->m_pNext = m_pCurIniNode->m_pNext;
      	if (m_pCurIniNode->m_pNext)
      	{
      		m_pCurIniNode->m_pNext->m_pPrev = m_pCurIniNode->m_pPrev;
      	}
      	delete m_pCurIniNode;
      	return true;
      }
      
      void IniFile::FreeIniList()
      {
      	if (nullptr == m_pIniList)
      	{
      		return;
      	}
      	pIniNode pNextIniNodeTemp = nullptr;
      	while (nullptr != m_pIniList)
      	{
      		pNextIniNodeTemp = m_pIniList->m_pNext;
      		delete m_pIniList;
      		m_pIniList = pNextIniNodeTemp;
      	}
      }
      
      void IniFile::CreateIniNode()
      {
      	pIniNode pIniNodeTemp = new IniNode;
      	memset(pIniNodeTemp, 0, sizeof(IniNode));
      
      
      	if (nullptr == m_pIniList)
      	{
      		m_pIniList = pIniNodeTemp;
      		m_pCurIniNode = pIniNodeTemp;
      		return;
      	}
      
      	m_pCurIniNode = m_pIniList;
      	while (m_pCurIniNode->m_pNext)
      	{
      		m_pandroidCurIniNode = m_pCurIniNode->m_pNext;
      	}
      
      	m_pCurIniNode->m_pNext = pIniNodeTemp;
      	pIniNodeTemp->m_pPrev = m_pCurIniNode;
      
      	m_pCurIniNode = pIniNodeTemp;
      }
      
      void IniFile::Trim(char* Buffer)
      {
      	int i = 0;
      	int len = strlen(Buffer);
      	for (i = len - 1; i >= 0; i--)
      	{
      		if (' ' != Buffer[i] && '\t' != Buffer[i] && '\n' != Buffer[i])
      		{
      			break;
      		}
      		Buffer[i] = 0;
      	}
      	for (i = 0; i < len; i++)
      	{
      		if (' ' != Buffer[i] && '\t' != Buffer[i] && '\n' != Buffer[i])
      		{
      			break;
      		}
      	}
      	if (0 != i)
      	{
      		strncpy(Buffer, Buffer + i, len - i);
      		Buffer[len - i] = 0;
      	}
      }
      
      pIniNode IniFile::FindSection(const char* Section)
      {
      	jsm_pCurIniNode = m_pIniList;
      	while (m_pCurIniNode)
      	{
      		if (!strcmp(m_pCurIniNode->m_Text.data(), Section) && m_pCurIniNode->m_Type == TYPE_SECTION)
      		{
      			return m_pCurIniNode;
      		}
      		m_pCurIniNode = m_pCurIniNode->m_pNext;
      	}
      
      	return nullptr;
      }
      
      pIniSec IniFile::FindParameter(const char* Section, const char* Key)
      {
      	m_pCurIniNode = m_pIniList;
      	pIniSec pIniSecTemp = new IniSec;
      	char Buf[256] = { 0 };
      	char* pChr = nullptr;
      
      	while (m_pCurIniNode)
      	{
      		if (!strcmp(m_pCurIniNode->m_Text.编程客栈data(), Section) && m_pCurIniNode->m_Type == TYPE_SECTION)
      		{
      			pIniSecTemp->m_pSection = m_pCurIniNode;
      			pIniSecTemp->m_SectionText = m_pCurIniNode->m_Text;
      			m_pCurIniNode = m_pCurIniNode->m_pNext;
      
      			while (m_pCurIniNode && m_pCurIniNode->m_Type == TYPE_PARAMETER)
      			{
      				strcpy(Buf, m_pCurIniNode->m_Text.data());
      				if (pChr = strchr(Buf, '='))
      				{
      					*pChr = 0;
      					Trim(Buf);
      					if (!strcmp(Buf, Key))
      					{
      						pIniSecTemp->m_pParameter = m_pCurIniNode;
      						pIniSecTemp->m_ParameterText = m_pCurIniNode->m_Text;
      						return pIniSecTemp;
      					}
      				}
      				m_pCurIniNode = m_pCurIniNode->m_pNext;
      			}
      			break;
      		}
      		m_pCurIniNode = m_pCurIniNode->m_pNext;
      	}
      
      	delete pIniSecTemp;
      	return nullptr;
      }
      
      void IniFile::AddIniNode(char Type, const char* Text)
      {
      
      
      	if (Type == TYPE_SECTION)
      	{
      		m_pCurIniNode->m_Type = TYPE_SECTION;
      		m_pCurIniNode->m_Text = Text;
      	}
      	else if (Type == TYPE_PARAMETER)
      	{
      		m_pCurIniNode->m_Type = TYPE_PARAMETER;
      		m_pCurIniNode->m_Text = Text;
      	}
      	return;
      }
      
      bool IniFile::WriteParameterPublic(const char* Section, const char* Key, const char* Value)
      {
      	if (!strcmp(Section, "") || !strcmp(Key, "") || !strcmp(Value, ""))
      	{
      		m_LastErrCode = 1;
      		m_LastErrMes = ERR_MES_1;
      		return false;
      	}
      
      	char Parameter[256] = { 0 };
      	strcpy(Parameter, Key);
      	strcat(Parameter, "=");
      	strcat(Parameter, Value);
      	pIniNode pSectionNodeTemp = FindSection(Section);
      	pIniSec pIniSecTemp = nullptr;
      	if (!pSectionNodeTemp)
      	{
      		CreateIniNode();
      		AddIniNode(TYPE_SECTION, Section);
      		CreateIniNode();
      		AddIniNode(TYPE_PARAMETER, Parameter);
      	}
      	else
      	{
      		if (!(pIniSecTemp = FindParameter(Section, Key)))
      		{
      			pIniNode pIniNodeTemp = new IniNode;
      			memset(pIniNodeTemp, 0, sizeof(IniNode));
      
      			pIniNodeTemp->m_pNext = pSectionNodeTemp->m_pNext;
      			pSectionNodeTemp->m_pNext = pIniNodeTemp;
      			if (pIniNodeTemp->m_pNext)
      			{
      				pIniNodeTemp->m_pNext->m_pPrev = pIniNodeTemp;
      			}
      			pIniNodeTemp->m_pPrev = pSectionNodeTemp;
      			m_pCurIniNode = pIniNodeTemp;
      			AddIniNode(TYPE_PARAMETER, Parameter);
      		}
      		else
      		{
      			m_pCurIniNode = pIniSecTemp->m_pParameter;
      			AddIniNode(TYPE_PARAMETER, Parameter);
      		}
      	}
      	delete pIniSecTemp;
      	pIniSecTemp = nullptr;
      
      	return true;
      }
      
      std::string IniFile::ReadParameterPublic(const char* Section, const char* Key, const char* Default)
      {
      	if (!strcmp(Section, "") || !strcmp(Key, "") || !strcmp(Default, ""))
      	{
      		m_LastErrCode = 1;
      		m_LastErrMes = ERR_MES_1;
      		return {};
      	}
      	std::string Ret;
      	pIniSec pIniSecTemp = FindParameter(Section, Key);
      	char* pChr = nullptr;
      	if (pIniSecTemp)
      	{
      		char Buf[256] = { 0 };
      		strcpy(Buf, pIniSecTemp->m_ParameterText.data());
      		if (pChr = strchr(Buf, '='))
      		{
      			strcpy(Buf, pChr + 1);
      		}
      
      		Ret = Buf;
      
      	}
      	else
      	{
      		Ret = Default;
      	}
      
      	delete pIniSecTemp;
      	return Ret;
      }
      

      四.其他

      说一个小技巧,如果担心格式写的不对,可以用熟悉的编辑器中设置文档格式这个功能调整一下,当然调整之后也要进行确认。

      到此这篇关于C++解析ini文件实现的文章就介绍到这了,更多相关C++解析ini文件内容请搜索编程客栈(www.devze.com)以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程客栈(www.devze.com)!

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