diff options
Diffstat (limited to 'vendor/github.com/goccy/go-json/internal/encoder/decode_rune.go')
-rw-r--r-- | vendor/github.com/goccy/go-json/internal/encoder/decode_rune.go | 126 |
1 files changed, 0 insertions, 126 deletions
diff --git a/vendor/github.com/goccy/go-json/internal/encoder/decode_rune.go b/vendor/github.com/goccy/go-json/internal/encoder/decode_rune.go deleted file mode 100644 index 35c959d48..000000000 --- a/vendor/github.com/goccy/go-json/internal/encoder/decode_rune.go +++ /dev/null @@ -1,126 +0,0 @@ -package encoder - -import "unicode/utf8" - -const ( - // The default lowest and highest continuation byte. - locb = 128 //0b10000000 - hicb = 191 //0b10111111 - - // These names of these constants are chosen to give nice alignment in the - // table below. The first nibble is an index into acceptRanges or F for - // special one-byte cases. The second nibble is the Rune length or the - // Status for the special one-byte case. - xx = 0xF1 // invalid: size 1 - as = 0xF0 // ASCII: size 1 - s1 = 0x02 // accept 0, size 2 - s2 = 0x13 // accept 1, size 3 - s3 = 0x03 // accept 0, size 3 - s4 = 0x23 // accept 2, size 3 - s5 = 0x34 // accept 3, size 4 - s6 = 0x04 // accept 0, size 4 - s7 = 0x44 // accept 4, size 4 -) - -// first is information about the first byte in a UTF-8 sequence. -var first = [256]uint8{ - // 1 2 3 4 5 6 7 8 9 A B C D E F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x00-0x0F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x10-0x1F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x20-0x2F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x30-0x3F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x40-0x4F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x50-0x5F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x60-0x6F - as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, as, // 0x70-0x7F - // 1 2 3 4 5 6 7 8 9 A B C D E F - xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x80-0x8F - xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0x90-0x9F - xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xA0-0xAF - xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xB0-0xBF - xx, xx, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xC0-0xCF - s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, s1, // 0xD0-0xDF - s2, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s3, s4, s3, s3, // 0xE0-0xEF - s5, s6, s6, s6, s7, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, xx, // 0xF0-0xFF -} - -const ( - lineSep = byte(168) //'\u2028' - paragraphSep = byte(169) //'\u2029' -) - -type decodeRuneState int - -const ( - validUTF8State decodeRuneState = iota - runeErrorState - lineSepState - paragraphSepState -) - -func decodeRuneInString(s string) (decodeRuneState, int) { - n := len(s) - s0 := s[0] - x := first[s0] - if x >= as { - // The following code simulates an additional check for x == xx and - // handling the ASCII and invalid cases accordingly. This mask-and-or - // approach prevents an additional branch. - mask := rune(x) << 31 >> 31 // Create 0x0000 or 0xFFFF. - if rune(s[0])&^mask|utf8.RuneError&mask == utf8.RuneError { - return runeErrorState, 1 - } - return validUTF8State, 1 - } - sz := int(x & 7) - if n < sz { - return runeErrorState, 1 - } - s1 := s[1] - switch x >> 4 { - case 0: - if s1 < locb || hicb < s1 { - return runeErrorState, 1 - } - case 1: - if s1 < 0xA0 || hicb < s1 { - return runeErrorState, 1 - } - case 2: - if s1 < locb || 0x9F < s1 { - return runeErrorState, 1 - } - case 3: - if s1 < 0x90 || hicb < s1 { - return runeErrorState, 1 - } - case 4: - if s1 < locb || 0x8F < s1 { - return runeErrorState, 1 - } - } - if sz <= 2 { - return validUTF8State, 2 - } - s2 := s[2] - if s2 < locb || hicb < s2 { - return runeErrorState, 1 - } - if sz <= 3 { - // separator character prefixes: [2]byte{226, 128} - if s0 == 226 && s1 == 128 { - switch s2 { - case lineSep: - return lineSepState, 3 - case paragraphSep: - return paragraphSepState, 3 - } - } - return validUTF8State, 3 - } - s3 := s[3] - if s3 < locb || hicb < s3 { - return runeErrorState, 1 - } - return validUTF8State, 4 -} |