diff options
author | 2022-01-23 14:41:31 +0100 | |
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committer | 2022-01-23 14:41:31 +0100 | |
commit | 7d024ce74d29a14bc8db60495751e674bdb24463 (patch) | |
tree | 6d6b0cde4a2245a2539e7251c484bcaf00291056 /vendor/github.com/dsoprea/go-exif/v2/common/parser.go | |
parent | pass reader around instead of []byte (diff) | |
download | gotosocial-7d024ce74d29a14bc8db60495751e674bdb24463.tar.xz |
use exif-terminator
Diffstat (limited to 'vendor/github.com/dsoprea/go-exif/v2/common/parser.go')
-rw-r--r-- | vendor/github.com/dsoprea/go-exif/v2/common/parser.go | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/vendor/github.com/dsoprea/go-exif/v2/common/parser.go b/vendor/github.com/dsoprea/go-exif/v2/common/parser.go deleted file mode 100644 index bbdd8f53a..000000000 --- a/vendor/github.com/dsoprea/go-exif/v2/common/parser.go +++ /dev/null @@ -1,219 +0,0 @@ -package exifcommon - -import ( - "bytes" - - "encoding/binary" - - "github.com/dsoprea/go-logging" -) - -var ( - parserLogger = log.NewLogger("exifcommon.parser") -) - -// Parser knows how to parse all well-defined, encoded EXIF types. -type Parser struct { -} - -// ParseBytesknows how to parse a byte-type value. -func (p *Parser) ParseBytes(data []byte, unitCount uint32) (value []uint8, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeByte.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - value = []uint8(data[:count]) - - return value, nil -} - -// ParseAscii returns a string and auto-strips the trailing NUL character that -// should be at the end of the encoding. -func (p *Parser) ParseAscii(data []byte, unitCount uint32) (value string, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeAscii.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - if len(data) == 0 || data[count-1] != 0 { - s := string(data[:count]) - parserLogger.Warningf(nil, "ascii not terminated with nul as expected: [%v]", s) - - return s, nil - } - - // Auto-strip the NUL from the end. It serves no purpose outside of - // encoding semantics. - - return string(data[:count-1]), nil -} - -// ParseAsciiNoNul returns a string without any consideration for a trailing NUL -// character. -func (p *Parser) ParseAsciiNoNul(data []byte, unitCount uint32) (value string, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeAscii.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - return string(data[:count]), nil -} - -// ParseShorts knows how to parse an encoded list of shorts. -func (p *Parser) ParseShorts(data []byte, unitCount uint32, byteOrder binary.ByteOrder) (value []uint16, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeShort.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - value = make([]uint16, count) - for i := 0; i < count; i++ { - value[i] = byteOrder.Uint16(data[i*2:]) - } - - return value, nil -} - -// ParseLongs knows how to encode an encoded list of unsigned longs. -func (p *Parser) ParseLongs(data []byte, unitCount uint32, byteOrder binary.ByteOrder) (value []uint32, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeLong.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - value = make([]uint32, count) - for i := 0; i < count; i++ { - value[i] = byteOrder.Uint32(data[i*4:]) - } - - return value, nil -} - -// ParseRationals knows how to parse an encoded list of unsigned rationals. -func (p *Parser) ParseRationals(data []byte, unitCount uint32, byteOrder binary.ByteOrder) (value []Rational, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeRational.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - value = make([]Rational, count) - for i := 0; i < count; i++ { - value[i].Numerator = byteOrder.Uint32(data[i*8:]) - value[i].Denominator = byteOrder.Uint32(data[i*8+4:]) - } - - return value, nil -} - -// ParseSignedLongs knows how to parse an encoded list of signed longs. -func (p *Parser) ParseSignedLongs(data []byte, unitCount uint32, byteOrder binary.ByteOrder) (value []int32, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeSignedLong.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - b := bytes.NewBuffer(data) - - value = make([]int32, count) - for i := 0; i < count; i++ { - err := binary.Read(b, byteOrder, &value[i]) - log.PanicIf(err) - } - - return value, nil -} - -// ParseSignedRationals knows how to parse an encoded list of signed -// rationals. -func (p *Parser) ParseSignedRationals(data []byte, unitCount uint32, byteOrder binary.ByteOrder) (value []SignedRational, err error) { - defer func() { - if state := recover(); state != nil { - err = log.Wrap(state.(error)) - } - }() - - // TODO(dustin): Add test - - count := int(unitCount) - - if len(data) < (TypeSignedRational.Size() * count) { - log.Panic(ErrNotEnoughData) - } - - b := bytes.NewBuffer(data) - - value = make([]SignedRational, count) - for i := 0; i < count; i++ { - err = binary.Read(b, byteOrder, &value[i].Numerator) - log.PanicIf(err) - - err = binary.Read(b, byteOrder, &value[i].Denominator) - log.PanicIf(err) - } - - return value, nil -} |