gitee.com/quant1x/gox@v1.7.6/text/encoding/fallback.go (about)

     1  package encoding
     2  
     3  // FallbackDecoder combines a series of Decoders into one.
     4  // If the first Decoder returns a status of INVALID_CHAR, the others are tried as well.
     5  //
     6  // Note: if the text to be decoded ends with a sequence of bytes that is not a valid character in the first charset,
     7  // but it could be the beginning of a valid character, the FallbackDecoder will give a status of NO_ROOM instead of
     8  // falling back to the other Decoders.
     9  func FallbackDecoder(decoders ...Decoder) Decoder {
    10  	return func(p []byte) (c rune, size int, status Status) {
    11  		for _, d := range decoders {
    12  			c, size, status = d(p)
    13  			if status != INVALID_CHAR {
    14  				return
    15  			}
    16  		}
    17  		return 0, 1, INVALID_CHAR
    18  	}
    19  }