从配置文件取参数

╰+攻爆jí腚メ 2022-03-16 18:11 196阅读 0赞

/*从配置文件取参数*/
    int GetParameter(char *File,char *Section,char *Keyword,char *Buffer,int Size)
    {
      FILE *fp;
      char buf[400],tmpbuf[400];
      char Sec[400] ,Key[400];
      int SecFlag = 0;
      char *ptb , *psend ;
      int len ;
    
      if(!(fp = fopen(File , "r")))
      {
         printf( "open file=[%s] error",File) ;
         return 1 ;
      }
    
      sprintf( Sec ,"[%s]",Section );
      sprintf( Key ,"%s",Keyword );
    
      while( !feof( fp ) ) {
         memset( buf ,0x0 ,sizeof(buf ));
         fgets(buf,sizeof(buf),fp);
         if( buf[ 0 ] == '#' )
            continue ;
         else if( memcmp(buf ,Sec ,strlen(Sec)) == 0 )
            {
            SecFlag = 1;
            continue;
            }
        else if(( buf[0] == '[' ) && SecFlag == 1 )
            {
              break;
            }
        else
           if( SecFlag == 1 )
            {
             if(memcmp( buf  ,Key ,strlen(Key) ) == 0 )
              {
                memset( tmpbuf ,0x0 ,sizeof(tmpbuf));
                memcpy( tmpbuf ,&buf[strlen(Key)] ,strlen(buf) - strlen(Key) );
                len = strlen ( tmpbuf );
                if( tmpbuf[len-1] == '\n' )
                   tmpbuf[len-1 ] = 0x0 ;
                len = strlen ( tmpbuf );
    
                ptb = tmpbuf ;
                while( *ptb == ' ' || * ptb == '=' )
                   ptb ++ ;
                if( ptb - tmpbuf >= strlen(tmpbuf) )
                    break;
    
                Size = len -( ptb - tmpbuf ) ;
    
                memcpy( Buffer ,ptb ,Size );
                SecFlag = 2;
                break;
              }
            continue;
            }
      }
    
      fclose(fp);
      if (SecFlag == 1 || SecFlag == 0 )
        return 1 ;
      else
         return 0;
    }

修改版本：添加了更新键值的函数

/*******************************************************************
    作    者: Kevin Liu
    函数功能: 从配置文件取参数键值
    入口参数: File,文件路径;Section,[配置模块];
    		  Keyword,键名;Value,存取键值;Size,键值长度
    返 回 值: 0-成功;失败:1-程序出错;2-找不到配置模块;
    			3-找不到键名;4-配置模块和键名可以找到但是没有键值;
    备    注: 20130925
    ********************************************************************/
    u8 GetParameter(u8 *File,u8 *Section,u8 *Keyword,u8 *Value,u32 *Size)  
    {  
    	FILE *fp;  
    	u8 buf[1024],tmpbuf[1024];  
    	u8 Sec[100] ,Key[100];  
    	int SecFlag=0;  
    	u8 *ptb;
    	u32 len=0;
    	u8 rslt=0;  
    	
    	memset(Sec, 0x00, sizeof(Sec));  
    	memset(Key, 0x00, sizeof(Key));  
    	
    	if((fp = fopen(File , "r"))==NULL)  
    	{  
    		printf( "[LGH-ERR-GetParameter()]open file=[%s] error\r\n",File ) ;  
    		return 1 ;  
    	}
    		
    	sprintf( Sec ,"[%s]",Section );  
    	sprintf( Key ,"%s",Keyword );  
    
    	#ifdef LGH_DEBUG
    	printf("[LGH--GetParameter()]查找开始\r\n");
    	#endif
    	
    	while( !feof( fp ) ) {  
    		memset(buf, 0x00, sizeof(buf));  
    		fgets(buf, sizeof(buf), fp);  
    
    		#ifdef LGH_DEBUG
    		printf("[LGH--GetParameter()]读取一行:%s\r\n", buf);
    		#endif
    		
    		if( buf[0] == '#' )  
    			continue ;  
    		else if( memcmp(buf ,Sec ,strlen(Sec)) == 0 )  
    		{  
    			#ifdef LGH_DEBUG
    			printf("[LGH--GetParameter()]--找到模块行:%s\r\n", buf);
    			#endif	
    				
    			SecFlag = 1;  
    			continue;  
    		}  
    		else if(( buf[0] == '[' ) && SecFlag == 1 )		
    		{  
    			#ifdef LGH_DEBUG
    			printf("[LGH--GetParameter()]该模块中没有此键名\r\n");
    			#endif
    			
    			rslt = 3;				//找不到键名
    			break;  
    		}
    		else 
    			if( SecFlag == 1 )  	//找到模块名
    			{  
    				if(memcmp( buf  ,Key ,strlen(Key) ) == 0 )  
    				{  
    					#ifdef LGH_DEBUG
    					printf("[LGH--GetParameter()]找到键名:%s\r\n", Key);
    					#endif
    					
    					memset( tmpbuf ,0x00 ,sizeof(tmpbuf));  
    					memcpy( tmpbuf ,&buf[strlen(Key)] ,strlen(buf)-strlen(Key) );  
    					len = strlen(tmpbuf);  
    					
    					
    					if( (tmpbuf[len-2]=='\r') && (tmpbuf[len-1]=='\n') ) {
    						tmpbuf[len-2 ] = 0x00;
    						tmpbuf[len-1 ] = 0x00;
    					}
    					else if( tmpbuf[len-1]=='\n' ) { 
    						tmpbuf[len-1 ] = 0x00;  
    					}
    					TrimR(tmpbuf);
    					len = strlen(tmpbuf);
    					
    					ptb = tmpbuf ;  
    					while( *ptb == ' ' || *ptb == '=' || *ptb == '\t' )  
    						ptb ++ ;  
    					if( (ptb-tmpbuf) >= strlen(tmpbuf) ) {  
    
    						#ifdef LGH_DEBUG
    						printf("[LGH--GetParameter()]该键值没有配置值\r\n");
    						#endif
    						
    						rslt = 4;
    						break;  
    					}    
    					
    					*Size = len -( ptb - tmpbuf ) ;  
    					memcpy( Value ,ptb ,*Size );
    					#ifdef LGH_DEBUG
    					printf("[LGH--GetParameter()]查找键值成功\r\n");
    					#endif
    					
    					rslt = 0;
    					break;  
    				}  
    				continue;  
    			}  
    	}  
    	
    	fclose(fp);  
    	if ( SecFlag == 0 ) {
    		#ifdef LGH_DEBUG
    		printf("[LGH--GetParameter()]没找到配置模块\r\n");
    		#endif
    
    		rslt = 2 ;  		//没找到配置模块
    	}
    	
    	return rslt;
    }  
    
    /*******************************************************************
    作    者: Kevin Liu
    函数功能: 修改配置文件的参数键值
    入口参数: File,文件路径;Section,[配置模块];
    		  Keyword,键名;Value,存取键值;Size,键值长度
    返 回 值: 0-成功;1-失败
    备    注: 20130925
    ********************************************************************/
    u8 SetParameter(u8 *File,u8 *Section,u8 *Keyword,u8 *Value,u32 Size)  
    {  
    	FILE *fp;  
    	u8 buf[1024], LineBuffer[1024];  
    	u8 Sec[100] ,Key[100];  
    	u32 SecFlag = 0;  
    	u8 *pFileLeft;  
    	u32 LineLen=0, FileSize=0, FileLeftLen=0, ModifySize=0;  
    	struct stat fs;
    
    	#ifdef LGH_DEBUG
    	printf("[LGH--SetParameter()]--begin\r\n");
    	#endif
    	
    	memset(Sec, 0x00, sizeof(Sec));  
     	memset(Key, 0x00, sizeof(Key)); 
    	memset(&fs, 0, sizeof(struct stat));
    	
    	if( stat(File, &fs)==0 ) {  	 //off_t     st_size; 
    		FileSize = fs.st_size;
    	}
    	pFileLeft = (u8 *)malloc(FileSize);
    	if( pFileLeft == NULL ) {
    		#ifdef LGH_DEBUG
    		printf("[LGH-ERR-SetParameter()]申请内存出错\r\n");
    		#endif
    		return 1;
    	}
    	memset(pFileLeft, 0, FileSize);
    	
    	memset(LineBuffer, 0, sizeof(LineBuffer));
    	sprintf( LineBuffer ,"%s=", Keyword); 
    	ModifySize = strlen(LineBuffer);
    	memcpy(LineBuffer+ModifySize, Value, Size);
    	ModifySize += Size;
    	memcpy(LineBuffer+ModifySize, "\r\n", 2);
    	ModifySize += 2;
    	
    	if(!(fp = fopen(File , "r+")))  
    	{  
    		#ifdef LGH_DEBUG
    		printf( "[LGH-ERR-SetParameter()]open file=[%s] error\r\n",File) ;  
    		#endif
    		return 1 ;  
    	}  
    	
    	sprintf( Sec ,"[%s]",Section );  
    	sprintf( Key ,"%s",Keyword );  
    	
    	while( !feof( fp ) ) {  
    		memset(buf, 0x00, sizeof(buf));  
    		fgets(buf, sizeof(buf), fp);
    		LineLen = strlen(buf);  
    		FileLeftLen = ( FileSize - ftell(fp) );
    		if( buf[0] == '#' )  
    			continue ;  
    		else if( memcmp(buf ,Sec ,strlen(Sec)) == 0 )  
    		{  
    			SecFlag = 1;  
    			continue;  
    		}  
    		else if(( buf[0] == '[' ) && SecFlag == 1 )  
    		{  
    			break;  
    		}  
    		else 
    			if( SecFlag == 1 )  
    			{  
    				if(memcmp( buf  ,Key ,strlen(Key) ) == 0 )  
    				{  
    					#ifdef LGH_DEBUG
    					printf("[LGH--SetParameter()]找到键名,准备更新:%s\r\n", Key);
    					#endif
    					fread(pFileLeft, sizeof(char), FileLeftLen, fp);
    					fseek(fp, 0-LineLen-FileLeftLen, SEEK_CUR);
    					truncate(File, ftell(fp));
    					fwrite(LineBuffer, sizeof(char), ModifySize, fp);
    					fwrite(pFileLeft, sizeof(char), FileLeftLen, fp);
    					SecFlag = 2;
    					#ifdef LGH_DEBUG
    					printf("[LGH--SetParameter()]更新键名成功:%s\r\n", Key);
    					#endif
    					break;  
    				}  
    				continue;  
    			}  
    	}  
    	
    	fclose(fp);  
    	free(pFileLeft);
    	#ifdef LGH_DEBUG
    	printf("[LGH--SetParameter()]--end\r\n");
    	#endif
    	if (SecFlag == 1 || SecFlag == 0 )  
    		return 1 ;  
    	else  
    		return 0;  
    }

文件内容格式如下：

\[POSP\]  
BatchNo=000001  
SysRefNo=000000000001  
AuthorCode=000001