cocos2d-x 读取CSV文件，读取本地Excel配置表的方法

标签：cocos2d   parse   map   c++   

//CSVReader.h

#define MAP_LINE std::map<std::string, std::string>			//key为首行字符串, value为此列字符串
#define MAP_CONTENT std::map<int, MAP_LINE>				//key为code, value为一行map
#define VEC_MAP  std::vector<std::pair<std::string, int>>

//csv文件读取器
class CSVReader
{
public:
	CSVReader();
	static CSVReader *getInst();	//获取实例

	//解析csv. fileName:csv文件名,
	void parse(const char *fileName);

	//获取内容map. filename:文件名
	const MAP_CONTENT &getContentMap(std::string filename);
	//获取一行map.filename:文件名， code一行code
	const MAP_LINE &getLineMap(std::string filename, int code);
	//获取某行某列的值
	const std::string  &getByCode(std::string filename, int code, const std::string &key);
private:
	//读取csv的一行.line:一行的内容
	void readCSVLine(const char *line, int index);

	 VEC_MAP m_firstVector;											//第一行的vector
	 MAP_CONTENT m_contentMap;									//内容map
	 std::map<std::string, MAP_CONTENT> m_fileMap;		//文件map

	 static CSVReader *m_inst;		//实例
};

//CSVReader.cpp

CSVReader *CSVReader::m_inst = NULL;

//构造函数
CSVReader::CSVReader()
{
	m_firstVector.clear();
	m_contentMap.clear();
	m_fileMap.clear();
}
//获取实例
CSVReader *CSVReader::getInst()	
{
	if(!m_inst)
	{m_inst = new CSVReader();}

	return m_inst;
}

//获取内容map. filename:文件名
const MAP_CONTENT &CSVReader::getContentMap(std::string filename)
{
	return m_fileMap.find(filename)->second;
}
//获取一行map.filename:文件名， code一行code
const MAP_LINE &CSVReader::getLineMap(std::string filename, int code)
{
	return getContentMap(filename).find(code)->second;
}

//获取某行某列的值
const std::string  &CSVReader::getByCode(std::string filename, int code, const std::string &key)
{
	return getLineMap(filename, code).find(key)->second;
}

//解析csv. fileName:csv文件名,
void CSVReader::parse(const char *fileName)
{
	m_contentMap.clear();		//首先进行清理


	std::string path = fileName;
	unsigned long size;
	const char *data = (const char*)(cocos2d::CCFileUtils::sharedFileUtils()->getFileData(path.c_str(),"r" , &size));
	CCAssert(data != NULL, "File is not exist.");
	if (data == NULL)
		return;
		
	char line[32768];	//一行最多字节数
	const char *src = data;
	if (size == 0)
		size = strlen(src);

	char *pl = line;		//指向line数组的指针
	int index = 0;
	bool skip = false;	//若一行为空，skip则标记为true

	while (data - src < size)
	{
		//读取到一行的末尾
		if (*data == '\n' && !skip)
		{
			*pl = '\0';
			readCSVLine(line, index);
			++index;
			pl = line;
		}
		else if (*data == '\r')
		{}
		else
		{
			//任何一个字段能留空
			if (*data == '"')
				skip = !skip;

			*pl = *data;
			++pl;
		}
		++data;
	}
	*pl = '\0';

	//添加到map
	m_fileMap.insert(std::map<std::string, MAP_CONTENT>::value_type(fileName, m_contentMap));
}

//读取csv的一行.line:一行的内容
void CSVReader::readCSVLine(const char *line, int index)
{
	char value[32768];	//一行最多字节数
	if (*line == '\0')
		return;

	char *pv[32];
	char *tv = value;
	bool skip = false;
	int count = 0;

	*tv = '\0';
	pv[count++] = tv;

	while (*line != '\0')
	{
		if (*line == ',' && !skip)
		{
			*tv = '\0';
			++tv;
			pv[count++] = tv;
		}
		else if (*line == '"')
		{
			skip = !skip;
		}
		else
		{
			*tv = *line;
			++tv;
		}
		++line;
	}
	*tv = '\0';

	//临时数组
	std::vector<std::pair<std::string, int> > tVector;  
	for (int i=0; i<count; ++i)
	{tVector.push_back(std::map<std::string, int>::value_type(pv[i], i));}

	//第一行作为key
	if(index == 0)
	{m_firstVector = tVector;}
	//第2行为注释
	else if(index > 1)
	{
		//一行的map
		std::map<string, string> tmp;
		for (int i = 0; i < m_firstVector.size(); i++)
		{tmp.insert(std::map<string, string>::value_type(m_firstVector[i].first, tVector[i].first));}

		m_contentMap.insert(std::map<int, std::map<string, string>>::value_type(atoi(tVector[0].first.c_str()), tmp));
	}
}

//用法如下

bool HelloWorldScene::init()
{
    //////////////////////////////

	CSVReader::getInst()->parse("haha.csv");

	MAP_LINE map_line = CSVReader::getInst()->getLineMap("haha.csv", 1000000);

	MAP_LINE::iterator it = map_line.begin();
	while (it != map_line.end())
	{
		CCLog("key:%s, value:%s", it->first.c_str(), it->second.c_str());
		it++;
	}
}

//csv表格数据如下图

cocos2d-x 读取CSV文件，读取本地Excel配置表的方法

标签：cocos2d   parse   map   c++   

原文地址：http://blog.csdn.net/zwc2xm/article/details/45919381