open source
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lvfulong
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/**
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@file JCJson.cpp
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@brief
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@author wyw
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@version 1.0
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@date 2014_6_17
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*/
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#include "JCJson.h"
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#include <ctype.h>
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namespace laya
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{
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//------------------------------------------------------------------------------
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JCJson::JCJson()
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{
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m_pRoot = NULL;
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}
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//------------------------------------------------------------------------------
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JCJson::~JCJson()
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{
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cleanUp();
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}
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//------------------------------------------------------------------------------
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bool JCJson::cleanUp()
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{
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if( m_pRoot != NULL )
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{
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m_pRoot->clearChild();
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delete m_pRoot;
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m_pRoot = NULL;
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}
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return true;
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}
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//------------------------------------------------------------------------------
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JsonNode* JCJson::getRoot()
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{
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return m_pRoot;
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}
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//------------------------------------------------------------------------------
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bool JCJson::paserJson( char* p_sBuffer )
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{
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return paserJson(p_sBuffer, strlen(p_sBuffer));
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}
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//------------------------------------------------------------------------------
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bool JCJson::paserJson( char* p_sBuffer, int len )
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{
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if( p_sBuffer == NULL )return false;
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if( m_pRoot == NULL )
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{
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m_pRoot = new JsonObject();
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}
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int nBufferSize = len;
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//找到第一个 “{” 这样做是为了避免 文件开头有其他文字
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int i = 0;
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while( i < nBufferSize )
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{
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if( p_sBuffer[i] != '{' )
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{
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i++;
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}
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else
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{
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break;
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}
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}
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int nOffset = i + 1;
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paserJson( p_sBuffer,nBufferSize,nOffset,m_pRoot );
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return true;
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}
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//------------------------------------------------------------------------------
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int JCJson::paserJson( char* p_sBuffer,int p_nBufferSize,int p_nOffset,JsonNode* p_pNode )
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{
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if( p_nOffset >= p_nBufferSize ) return p_nOffset;
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int i = p_nOffset;
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bool bValueString = false;
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char* sKey = NULL;
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char* sValue = NULL;
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PASER_JSON_STATE nState = PJ_STATE_INIT;
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while( i < p_nBufferSize )
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{
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//初始状态
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if( nState == PJ_STATE_INIT )
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{
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//如果找到的是 " 就开始进入匹配KEY的状态
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if( p_sBuffer[i] == '"' )
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{
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nState = PJ_STATE_MATCHING_KEY;
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sKey = (p_sBuffer + i + 1);
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}
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//如果是 { 证明又是一个对象,重新递归读取对象
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else if( p_sBuffer[i] == '{' )
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{
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JsonObject* pObject = new JsonObject();
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p_pNode->addChild( pObject );
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i = paserJson( p_sBuffer,p_nBufferSize,++i,pObject );
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//数据恢复
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{
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nState = PJ_STATE_INIT;
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sKey = NULL;
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sValue = NULL;
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}
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}
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else if( p_sBuffer[i] == '}' )
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{
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return i;
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}
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else if( p_sBuffer[i] == ']' )
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{
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return i;
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}
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//这个有点凑了，，因为在文件中会出现 "mat": [1.3,0,0,1.3,0.294,2.893]
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//这样的现象，所以要处理
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else if( isgraph( p_sBuffer[i] ) && ( p_sBuffer[i] != ',' ) )
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{
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sKey = (char*)"";
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sValue = p_sBuffer + i;
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nState = PJ_STATE_MATCHING_VALUE;
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}
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}
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//如果是匹配key,知道匹配上 " key的值就有了，并进入匹配value阶段
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else if( nState == PJ_STATE_MATCHING_KEY )
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{
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if( p_sBuffer[i] == '"' )
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{
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p_sBuffer[i] = 0;
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}
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else if( p_sBuffer[i] == ':' )
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{
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bValueString = false;
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sValue = p_sBuffer + i + 1;
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nState = PJ_STATE_MATCHING_VALUE;
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}
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// == ',' 和 下面的 } ] 这两个是为了，怕碰到这种情况 "config_file_path": ["daji0.plist","daji1.plist"]
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else if( p_sBuffer[i] == ',' )
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{
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JsonValue* pJsonValue = new JsonValue();
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p_sBuffer[i] = 0;
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pJsonValue->setKeyAndValue( (char*)"",sKey );
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p_pNode->addChild( pJsonValue );
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//数据恢复
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{
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nState = PJ_STATE_INIT;
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sKey = NULL;
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sValue = NULL;
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}
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}
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else if( p_sBuffer[i] == '}' || p_sBuffer[i] == ']' )
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{
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JsonValue* pJsonValue = new JsonValue();
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p_sBuffer[i] = 0;
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pJsonValue->setKeyAndValue( (char*)"",sKey );
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p_pNode->addChild( pJsonValue );
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return i;
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}
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}
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//开始匹配value
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else if( nState == PJ_STATE_MATCHING_VALUE )
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{
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if( bValueString == false )
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{
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if( p_sBuffer[i] == '"')
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{
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sValue = p_sBuffer + i + 1;
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bValueString = true;
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}
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//如果是 [ 是数组，再次递归
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else if( p_sBuffer[i] == '[' )
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{
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nState = PJ_STATE_MATCHING_ARRAY;
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JsonArray* pArray = new JsonArray();
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pArray->setKey( sKey );
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p_pNode->addChild( pArray );
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i = paserJson( p_sBuffer,p_nBufferSize,++i,pArray );
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//数据恢复
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{
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nState = PJ_STATE_INIT;
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sKey = NULL;
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sValue = NULL;
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}
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}
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//如果是 { 是object，再次递归
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else if( p_sBuffer[i] == '{' )
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{
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nState = PJ_STATE_MATCHING_OBJECT;
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JsonObject* pObject = new JsonObject();
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pObject->setKey( sKey );
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p_pNode->addChild( pObject );
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i = paserJson( p_sBuffer,p_nBufferSize,++i,pObject );
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//数据恢复
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{
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nState = PJ_STATE_INIT;
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sKey = NULL;
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sValue = NULL;
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}
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}
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else if( p_sBuffer[i] == ',' )
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{
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JsonValue* pJsonValue = new JsonValue();
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p_sBuffer[i] = 0;
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pJsonValue->setKeyAndValue( sKey,sValue );
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p_pNode->addChild( pJsonValue );
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//数据恢复
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{
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nState = PJ_STATE_INIT;
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sKey = NULL;
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sValue = NULL;
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}
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}
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else if( p_sBuffer[i] == '}' || p_sBuffer[i] == ']' )
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{
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JsonValue* pJsonValue = new JsonValue();
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p_sBuffer[i] = 0;
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pJsonValue->setKeyAndValue( sKey,sValue );
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p_pNode->addChild( pJsonValue );
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return i;
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}
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}
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else
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{
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if( p_sBuffer[i] == '"' )
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{
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JsonValue* pJsonValue = new JsonValue();
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p_sBuffer[i] = 0;
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pJsonValue->setKeyAndValue( sKey,sValue );
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p_pNode->addChild( pJsonValue );
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bValueString = false;
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//数据恢复
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{
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nState = PJ_STATE_INIT;
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sKey = NULL;
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sValue = NULL;
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}
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}
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}
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}
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i++;
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}
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return i;
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}
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//------------------------------------------------------------------------------
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}
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//------------------------------------------------------------------------------
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//-----------------------------END FILE--------------------------------
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