QT 比較兩個文件是否一致（不限格式）

所謂不限格式就是講文件以二進制的格式打開，逐位進行比較。

/******************************************************
說明：比較兩個消息文件是否一致，如果一致返回0
輸入：待比較消息的路徑
***********************************************************/
int CompareMsg(char* msg1, char* msg2);

CompareMsg(char* msg1, char* msg2)
{
	//將2個消息各自讀取到buffer中
	FILE *pOne, *pTwe;
	long lsize1, lsize2;
	char* buffer1 = NULL;
	char* buffer2 = NULL;
	size_t result1, result2;

	pOne = fopen(msg1, "rb");
	pTwe = fopen(msg2, "rb");
	if ((pOne == NULL) || (pTwe == NULL))
	{
		fclose(pOne);
		fclose(pTwe);
		return 1;
	}

	fseek(pOne, 0, SEEK_END);
	lsize1 = ftell(pOne);
	//rewind(pOne);
	fseek(pOne, 0, SEEK_SET);
	fseek(pTwe, 0, SEEK_END);
	lsize2 = ftell(pTwe);
	rewind(pTwe);

	if (lsize1 != lsize2)
	{
		fclose(pOne);
		fclose(pTwe);
		return 1;
	}

	buffer1 = new char[lsize1];
	buffer2 = new char[lsize2];
	if ((buffer1 == NULL) || (buffer2 == NULL))
	{
		fclose(pOne);
		fclose(pTwe);
		delete[]buffer1;
		delete[]buffer2;
		return 1;
	}

	result1 = fread(buffer1, 1, lsize1, pOne);
	result2 = fread(buffer2, 1, lsize2, pTwe);
	if ((result1 != lsize1) || (result2 != lsize2))
	{
		fclose(pOne);
		fclose(pTwe);
		delete[]buffer1;
		delete[]buffer2;
		return 1;
	}


	int result = memcmp(buffer1, buffer2, lsize1);

	fclose(pOne);
	fclose(pTwe);
	delete[]buffer1;
	delete[]buffer2;

	return result;
}