charset

Documentation

Index

• type CodingSystem
  • func ParseSpecificCharacterSet(encodingNames []string) (CodingSystem, error)
• type CodingSystemType

Types

type CodingSystem

type CodingSystem struct {
	// VR="PN" is the only place where we potentially use all three
	// decoders.  For all other VR types, only Ideographic decoder is used.
	// See P3.5, 6.2.
	//
	// P3.5 6.1 is supposed to define the coding systems in detail.  But the
	// spec text is insanely obtuse and I couldn't tell what its meaning
	// after hours of trying. So I just copied what pydicom charset.py is
	// doing.
	Alphabetic  *encoding.Decoder
	Ideographic *encoding.Decoder
	Phonetic    *encoding.Decoder
}

CodingSystem defines how a DICOM []byte is translated into a utf8 string.

func ParseSpecificCharacterSet

func ParseSpecificCharacterSet(encodingNames []string) (CodingSystem, error)

ParseSpecificCharacterSet converts DICOM character encoding names, such as "ISO-IR 100" to encoding.Decoder(s). It will return nil, nil for the default (7bit ASCII) encoding. Cf. P3.2 D.6.2. https://dicom.nema.org/medical/dicom/2016d/output/chtml/part02/sect_D.6.2.html

type CodingSystemType

type CodingSystemType int

CodingSystemType defines the where the coding system is going to be used. This distinction is useful in Japanese, but of little use in other languages.

const (
	// AlphabeticCodingSystem is for writing a name in (English) alphabets.
	AlphabeticCodingSystem CodingSystemType = iota
	// IdeographicCodingSystem is for writing the name in the native writing
	// system (Kanji).
	IdeographicCodingSystem
	// PhoneticCodingSystem is for hirakana and/or katakana.
	PhoneticCodingSystem
)