JSONCPP操作帮助

JSONCPP解析时比较麻烦，要判这判那的，于是直接简单封装了一个helper，如果要想面向对象可以直接改成类的静态成员。

jsoncpp_helper.h

#pragma once

#if( defined(WIN32) || defined(WIN64) )
#include "jsoncpp/include/json/json.h"
#else
#include "jsoncpp/json/json.h"
#endif

#include <string>

bool _TrimJsonValueString(Json::Value &Root, const char* pszNodeName, std::string& strOut);
bool _TrimJsonValueInt(Json::Value &Root, const char* pszNodeName, int& nOut, bool bFromString = false);
bool _TrimJsonValueUint(Json::Value &Root, const char* pszNodeName, unsigned int& nOut, bool bFromString = false);
bool _TrimJsonValueInt64(Json::Value &Root, const char* pszNodeName, int64_t& nOut);
bool _TrimJsonValueUint64(Json::Value &Root, const char* pszNodeName, uint64_t& nOut);

jsoncpp_helper.cpp:
#include "jsoncpp_helper.h"

bool _TrimJsonValueString(Json::Value &Root, const char* pszNodeName, std::string& strOut)
{
if (Root.isMember(pszNodeName) && !Root[pszNodeName].isNull() && Root[pszNodeName].isString())
{
strOut = Root[pszNodeName].asString();
return true;
}

return false;
}

bool _TrimJsonValueInt(Json::Value &Root, const char* pszNodeName, int& nOut, bool bFromString)
{
if (bFromString)
{
std::string strTmp;
if (!_TrimJsonValueString(Root, pszNodeName, strTmp)) return false;
nOut = atoi(strTmp.c_str());
return true;
}

if (Root.isMember(pszNodeName) && !Root[pszNodeName].isNull() && Root[pszNodeName].isInt())
{
nOut = Root[pszNodeName].asInt();
return true;
}

return false;
}

bool _TrimJsonValueUint(Json::Value &Root, const char* pszNodeName, unsigned int& nOut, bool bFromString)
{
if (bFromString)
{
std::string strTmp;
if (!_TrimJsonValueString(Root, pszNodeName, strTmp)) return false;
nOut = atoi(strTmp.c_str());
return true;
}

if (Root.isMember(pszNodeName) && !Root[pszNodeName].isNull() && Root[pszNodeName].isInt())
{
nOut = Root[pszNodeName].asInt();
return true;
}

return false;
}

bool _TrimJsonValueInt64(Json::Value &Root, const char* pszNodeName, int64_t& nOut)
{
std::string strTmp;
if (!_TrimJsonValueString(Root, pszNodeName, strTmp)) return false;
nOut = atoll(strTmp.c_str());
return true;
}

bool _TrimJsonValueUint64(Json::Value &Root, const char* pszNodeName, uint64_t& nOut)
{
std::string strTmp;
if (!_TrimJsonValueString(Root, pszNodeName, strTmp)) return false;
nOut = atoll(strTmp.c_str());
return true;
}