go-exif/v2
Dustin Oprea 1bdfa9b10e Empower ITEs to resolve values and raw bytes directly
They'll also now embed all of the information they need to know since it
is all known where the ITEs are created. This prevents the user from
having to be involved in it. This makes it much more straightforward and
enjoyable to use.

- ifd_tag_entry.go
  - newIfdTagEntry now takes and embeds `addressableBytes` and
    `byteOrder`.
  - We've dumped the `value` member that let the caller preload a parsed
    value (or bytes?). It's no longer necessary since this led to
    inconsistencies and the ITE can produce these values directly, now.
  - `Value()` obviously no longer takes `addressableValue` and
    `byteOrder` since now embedded.
  - `Value()` will now see and return ErrUnhandledUnknownTypedTag
    directly (not wrapping it, since this is a handled case).

- common/type.go: FormatFromType now uses Stringer as a fallback if
  possible. All undefined-tag wrapper types implement it, so the same
  function can handle both undefined and non-undefined values, and the
  individual types can control the strings presented in simple listing.

- Dropped "resolveValue" parameters from all of the collect, visit, and
  parsing functions. Resolution is now a later step performed by the
  caller on the ITEs, directly.

  - This parameter was protection against undefined-type values
    disrupting simple enumeration, but now the user can simply produce
    the list of tags and can either choose to decode their value or not,
    directly. If they do, they, as of earlier, recent commits, also have
    the ability to properly manage unhandled undefined-values so they
    don't crash.

- The ITEs can now create ValueContext structs directly
  (GetValueContext()), though it might not be necessary now that the
  ITEs can produce the values and encodings directly.

  - This also allowed us to dump several other GetValueContext()
    implementations elsewhere since it is now self-reliant on this type
    and those methods were essentially kludges for the lack of this.

- Dump a bunch of "Value" methods from ITEs which just weren't useful or
  simple enough. Replaced by the above.

- Fixed `(Ifd).String()` to have a pointer receiver.
2020-01-12 18:56:35 -05:00
..
assets Add v2 release module 2020-01-02 07:06:28 -05:00
common Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
exif-read-tool Add v2 release module 2020-01-02 07:06:28 -05:00
undefined undefined/accessor.go: Drop unnecessary parameters from Decode() 2020-01-12 18:56:35 -05:00
.MODULE_ROOT Added all tests for type.go, type_encode.go, parser.go, value_context.go, and utility.go 2020-01-12 18:56:35 -05:00
LICENSE Add v2 release module 2020-01-02 07:06:28 -05:00
error.go Add v2 release module 2020-01-02 07:06:28 -05:00
exif.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
exif_test.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
go.mod Refactor undefined-type tag processing 2020-01-12 18:56:35 -05:00
go.sum Refactor undefined-type tag processing 2020-01-12 18:56:35 -05:00
gps.go Add v2 release module 2020-01-02 07:06:28 -05:00
ifd.go New integration of common/ and undefined/ subpackages 2020-01-12 18:56:35 -05:00
ifd_builder.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_builder_encode.go New integration of common/ and undefined/ subpackages 2020-01-12 18:56:35 -05:00
ifd_builder_encode_test.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_builder_test.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_enumerate.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_enumerate_test.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_tag_entry.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_tag_entry_test.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
ifd_test.go New integration of common/ and undefined/ subpackages 2020-01-12 18:56:35 -05:00
readme.go Add v2 release module 2020-01-02 07:06:28 -05:00
tags.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
tags_data.go Add v2 release module 2020-01-02 07:06:28 -05:00
tags_test.go New integration of common/ and undefined/ subpackages 2020-01-12 18:56:35 -05:00
testing_common.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
utility.go Empower ITEs to resolve values and raw bytes directly 2020-01-12 18:56:35 -05:00
utility_test.go New integration of common/ and undefined/ subpackages 2020-01-12 18:56:35 -05:00

readme.go

// exif parses raw EXIF information given a block of raw EXIF data. It can also
// construct new EXIF information, and provides tools for doing so. This package
// is not involved with the parsing of particular file-formats.
//
// The EXIF data must first be extracted and then provided to us. Conversely,
// when constructing new EXIF data, the caller is responsible for packaging
// this in whichever format they require.
package exif