Function charDiffIoUtil

executor/checker.go:111–195

比较每一个字符，但是忽略空白 Compare each char in buffer, but ignore the 'SpaceChar'

(useroutBuffer, answerBuffer []byte, useroutLen, answerLen int64)

// 比较每一个字符，但是忽略空白
// Compare each char in buffer, but ignore the 'SpaceChar'
func charDiffIoUtil(useroutBuffer, answerBuffer []byte, useroutLen, answerLen int64) (rel int, logtext string) {
	var (
		leftPos, rightPos   int64 = 0, 0
		maxLength                 = Max(useroutLen, answerLen)
		leftByte, rightByte byte
	)
	for (leftPos < maxLength) && (rightPos < maxLength) && (leftPos < useroutLen) && (rightPos < answerLen) {
		if leftPos < useroutLen {
			leftByte = useroutBuffer[leftPos]
		}
		if rightPos < answerLen {
			rightByte = answerBuffer[rightPos]
		}

		for leftPos < useroutLen && isSpaceChar(leftByte) {
			leftPos++
			if leftPos < useroutLen {
				leftByte = useroutBuffer[leftPos]
			} else {
				leftByte = 0
			}
		}
		for rightPos < answerLen && isSpaceChar(rightByte) {
			rightPos++
			if rightPos < answerLen {
				rightByte = answerBuffer[rightPos]
			} else {
				rightByte = 0
			}
		}

		if leftByte != rightByte {
			return constants.JudgeFlagWA, fmt.Sprintf(
				"WA: at leftPos=%d, rightPos=%d, leftByte=%d, rightByte=%d",
				leftPos,
				rightPos,
				leftByte,
				rightByte,
			)
		}
		leftPos++
		rightPos++
	}

	// 如果左游标没跑完
	for leftPos < useroutLen {
		leftByte = useroutBuffer[leftPos]
		if !isSpaceChar(leftByte) {
			return constants.JudgeFlagWA, fmt.Sprintf(
				"WA: leftPos=%d, rightPos=%d, leftLen=%d, rightLen=%d",
				leftPos,
				rightPos,
				useroutLen,
				answerLen,
			)
		}
		leftPos++
	}