#include "file_io.h"

void _write_config_file(char *cfgname)
{

}

void __read_config_file(char *cfgName)
{

}

/**
 *@brief 从给定字符串中提取key和value对。
 *处理字符串data，从中取出第一个key和value并存入key和value
 *@param data 要解析的字符串
 *@param key 保存提取到的KEY串
 *@param value 保存提取到的value串
 *@param maxlen key和value能容忍的最大字符串长度
 *@return 处理完字符串后，指针指向的位置
 *
 */
char *sysfunc_get_key_value(char *data, char *key, char *value, int maxlen)
{
	int i = 0;
	char *temp = data;
	while(*temp && *temp == ';')
		temp++;
	while(*temp && *temp != ';' && *temp != '=' 
		&& i < maxlen)
	{
		key[i++] = *temp++;
	}
	key[i] = '\0';
	if (*temp == ';' || *temp == '\0')
		value[0] = '\0';
	else if(*temp == '=')
	{
		i = 0;
		temp++;
		while(*temp && *temp != ';'
			&& i < maxlen)
		{
			value[i++] = *temp++;
		}
		value[i] = 0;
	}
	return temp;
}

//返回参数长度
U32 ParseParam(char *pParam, int nMaxLen, char *pBuffer)
{
	int nLen	= 0;
	while(pBuffer && *pBuffer && *pBuffer != ';')
	{
		*pParam++ = *pBuffer++;
		nLen++;
	}
	return nLen;
}

//从acData中，查找key的值，保存在value中
static char *__get_value(char *acData, char *key, char *value, int nMaxLen)
{
	char *pItem, *pValue;
	U32 nRead;
	char acBuff[256]={0};
	U32 nOffset = 0;
	int nCh = 0;
	char *out_ptr = NULL;
	while ((nRead = ParseParam(acBuff, 64, acData+nOffset)) > 0)
	{
		acBuff[nRead]	= 0;	//把分号去掉
		nOffset += (nRead+1);
		if (strncmp(acBuff, "[CH1]", 5) == 0)
		{
			nCh = 0;
		}
		else if (strncmp(acBuff, "[CH2]", 5) == 0)
		{
			nCh = 1;
		}
		else if (strncmp(acBuff, "[CH3]", 5) == 0)
		{
			nCh = 2;
		}
		else if (strncmp(acBuff, "[ALL]", 5) == 0)
		{
			nCh = 0;
		}
		else
		{
			pItem = strtok_r(acBuff, "=", &out_ptr);
			pValue = strtok_r(NULL, "\r", &out_ptr);
			//Printf("pItem: %s, pValue: %s\n", pItem, pValue);
			if (pValue == NULL)
				pValue = "";

			if (pItem != NULL && strcmp(pItem, key) == 0)
			{
				strncpy(value, pValue, nMaxLen);
				return value;
			}
		}
	}
	return NULL;
}