cocos2d-x 读取CSV文件，读取本地Excel配置表的方法

#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 *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));
}
}

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++;
}
}