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Showing content from https://docs.ruby-lang.org/en/3.4/Encoding/InvalidByteSequenceError.html below:

class Encoding::InvalidByteSequenceError - Documentation for Ruby 3.4

1. Encoding::
2. InvalidByteSequenceError

Raised by Encoding and String methods when the string being transcoded contains a byte invalid for the either the source or target encoding.

static VALUE
ecerr_destination_encoding(VALUE self)
{
    return rb_attr_get(self, id_destination_encoding);
}

Returns the destination encoding as an encoding object.

static VALUE
ecerr_destination_encoding_name(VALUE self)
{
    return rb_attr_get(self, id_destination_encoding_name);
}

Returns the destination encoding name as a string.

static VALUE
ecerr_error_bytes(VALUE self)
{
    return rb_attr_get(self, id_error_bytes);
}

Returns the discarded bytes when Encoding::InvalidByteSequenceError occurs.

ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1")
begin
  ec.convert("abc\xA1\xFFdef")
rescue Encoding::InvalidByteSequenceError
  p $!      
  puts $!.error_bytes.dump          
  puts $!.readagain_bytes.dump      
end

static VALUE
ecerr_incomplete_input(VALUE self)
{
    return rb_attr_get(self, id_incomplete_input);
}

Returns true if the invalid byte sequence error is caused by premature end of string.

ec = Encoding::Converter.new("EUC-JP", "ISO-8859-1")

begin
  ec.convert("abc\xA1z")
rescue Encoding::InvalidByteSequenceError
  p $!      
  p $!.incomplete_input?    
end

begin
  ec.convert("abc\xA1")
  ec.finish
rescue Encoding::InvalidByteSequenceError
  p $!      
  p $!.incomplete_input?    
end

static VALUE
ecerr_readagain_bytes(VALUE self)
{
    return rb_attr_get(self, id_readagain_bytes);
}

Returns the bytes to be read again when Encoding::InvalidByteSequenceError occurs.

static VALUE
ecerr_source_encoding(VALUE self)
{
    return rb_attr_get(self, id_source_encoding);
}

Returns the source encoding as an encoding object.

Note that the result may not be equal to the source encoding of the encoding converter if the conversion has multiple steps.

ec = Encoding::Converter.new("ISO-8859-1", "EUC-JP") 
begin
  ec.convert("\xa0") 
rescue Encoding::UndefinedConversionError
  p $!.source_encoding              
  p $!.destination_encoding         
  p $!.source_encoding_name         
  p $!.destination_encoding_name    
end

static VALUE
ecerr_source_encoding_name(VALUE self)
{
    return rb_attr_get(self, id_source_encoding_name);
}

Returns the source encoding name as a string.

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