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#ifndef _FILECONF_H_
#define _FILECONF_H_

/*
 * pcFileName：配置文件全路径名称
 * pcKey：配置文件key索引
 * pcValue：配置文件key值
 * 
 */
int ModifyParam(char *pcFileName, char *pcKey, char *pcValue);
int ReadParam(char *pcFileName, char *pcKey, char *pcValue);

#endif

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int CopyFile(char *pcDstFile, char *pcSrcFile)
{
    FILE *fpr = NULL;
    FILE *fpw = NULL;
    int iLen = 0;
    int iFileLen = 0;
    int iSize = 0;
    char acBuf[4096];
    
    if (NULL == pcDstFile || NULL == pcSrcFile)
    {
        return -1;	
    }
    fpr = fopen(pcSrcFile, "rb");
    if (fpr == NULL)
    {
        perror("open read file:");
        return -1;
    }

    fpw = fopen(pcDstFile, "wb");
    if (fpw == NULL)
    {
        printf("[%s]open write file %sn", __FUNCTION__, pcDstFile);
        perror("open write file error:");
        
        return -1;
    }

    while (1)
    {
        iLen = fread(acBuf, 1, sizeof(acBuf), fpr);
        if (iLen <= 0)
        {
            printf("read file overn");
            break;
        }
        iSize = fwrite(acBuf, 1, iLen, fpw);
        if (iSize != iLen)
        {
            perror("wirte file error:");
            fclose(fpr);
            fclose(fpw);
            return -1;
        }
        iFileLen += iLen;
    }
    fflush(fpw);
    fsync(fileno(fpw));
    fclose(fpr);
    fclose(fpw);
    
    return iFileLen;
}

int ModifyParam(char *pcFileName, char *pcKey, char *pcValue)
{
    FILE *pOldFile = NULL;
    FILE *pNewFile = NULL;
    char acTmpName[128];
    char acBuf[256];
    int iFlag = 0;

    pOldFile = fopen(pcFileName, "rb");
    if (NULL == pOldFile)
    {
        printf("[%s] open file %s errorn", __FUNCTION__, pcFileName);
        perror(":");
        return -1;
    }

    snprintf(acTmpName, sizeof(acTmpName), "%s~", pcFileName);
    pNewFile = fopen(acTmpName, "wb");
    if (NULL == pNewFile)
    {
        printf("[%s] open file %s errorn", __FUNCTION__, acTmpName);
        perror(":");
        fclose(pOldFile);
        return -1;
    }
    while (fgets(acBuf, sizeof(acBuf), pOldFile))
    {
        if (memcmp(acBuf, pcKey, strlen(pcKey)) == 0)
        {
            snprintf(acBuf, sizeof(acBuf), "%s=%sn", pcKey, pcValue);
            fputs(acBuf, pNewFile);	
            iFlag++;
        }
        else
        {
            fputs(acBuf, pNewFile);
        }
    }
    
    // 如果没有此项，则添加一项
    if (0 == iFlag)
    {
        snprintf(acBuf, sizeof(acBuf), "%s=%sn", pcKey, pcValue);
        fputs(acBuf, pNewFile);	
    }
    fflush(pNewFile);
    fsync(fileno(pNewFile));
    fclose(pOldFile);
    fclose(pNewFile);
    //rename(acTmpName, pcFileName);

    CopyFile(pcFileName, acTmpName);
    
    return 0;
}

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int ReadParam(char *pcFileName, char *pcKey, char *pcValue)
{
    FILE *pFile = NULL;
    char acBuf[128];
    char *pcPos = NULL;
    int iLen = 0;
    int iRet = -1;

    pFile = fopen(pcFileName, "rb");
    if (NULL == pFile)
    {
        printf("[%s] open file %s errorn", __FUNCTION__, pcFileName);
        perror(":");
        return -1;
    }

    while (fgets(acBuf, sizeof(acBuf), pFile))
    {
        if (memcmp(acBuf, pcKey, strlen(pcKey)) == 0)
        {
            pcPos = acBuf;
            strsep(&pcPos, "=");
            if (NULL == pcPos)
            {
                printf("line:%s, param error!!!n", acBuf);
                break;
            }
            iLen = strlen(pcPos);
            if (iLen > 0)
                pcPos[iLen-1] = '';
            strcpy(pcValue, pcPos);
            iRet = 0;
            break;
        }

    }
    
    fclose(pFile);
	
    return iRet;
}