Function lineCSVParseFast

io.go:851–886

Fast CSV parser for simple cases (no quotes, no escaping) Falls back to standard parser if needed

(s string, sep rune)

// Fast CSV parser for simple cases (no quotes, no escaping)
// Falls back to standard parser if needed
func lineCSVParseFast(s string, sep rune) ([]string, error) {
	// Quick check if line contains quotes (needs full parser)
	hasQuotes := false
	for i := 0; i < len(s); i++ {
		if s[i] == '"' {
			hasQuotes = true
			break
		}
	}

	// Use fast path for simple CSV lines
	if !hasQuotes {
		// Count separators to pre-allocate slice
		sepCount := 0
		for i := 0; i < len(s); i++ {
			if rune(s[i]) == sep {
				sepCount++
			}
		}

		result := make([]string, 0, sepCount+1)
		start := 0
		for i := 0; i < len(s); i++ {
			if rune(s[i]) == sep {
				result = append(result, s[start:i])
				start = i + 1
			}
		}
		// Add last field
		result = append(result, s[start:])
		return result, nil
	}

	// Fall back to standard parser for complex cases
	return lineCSVParse(s, sep)
}

// add displayable(according to user's input argument) RowArray(covert line to array) To Buffer
func addDRToBuffer(b *Buffer, line string, showNum, hideNum []int) error {