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authorLibravatar Tobi Smethurst <31960611+tsmethurst@users.noreply.github.com>2021-08-12 21:03:24 +0200
committerLibravatar GitHub <noreply@github.com>2021-08-12 21:03:24 +0200
commit98263a7de64269898a2f81207e38943b5c8e8653 (patch)
tree743c90f109a6c5d27832d1dcef2388d939f0f77a /vendor/github.com/goccy/go-json/internal/encoder/int.go
parentText duplication fix (#137) (diff)
downloadgotosocial-98263a7de64269898a2f81207e38943b5c8e8653.tar.xz
Grand test fixup (#138)
* start fixing up tests * fix up tests + automate with drone * fiddle with linting * messing about with drone.yml * some more fiddling * hmmm * add cache * add vendor directory * verbose * ci updates * update some little things * update sig
Diffstat (limited to 'vendor/github.com/goccy/go-json/internal/encoder/int.go')
-rw-r--r--vendor/github.com/goccy/go-json/internal/encoder/int.go124
1 files changed, 124 insertions, 0 deletions
diff --git a/vendor/github.com/goccy/go-json/internal/encoder/int.go b/vendor/github.com/goccy/go-json/internal/encoder/int.go
new file mode 100644
index 000000000..70ea5f7d7
--- /dev/null
+++ b/vendor/github.com/goccy/go-json/internal/encoder/int.go
@@ -0,0 +1,124 @@
+package encoder
+
+import (
+ "unsafe"
+)
+
+var endianness int
+
+func init() {
+ var b [2]byte
+ *(*uint16)(unsafe.Pointer(&b)) = uint16(0xABCD)
+
+ switch b[0] {
+ case 0xCD:
+ endianness = 0 // LE
+ case 0xAB:
+ endianness = 1 // BE
+ default:
+ panic("could not determine endianness")
+ }
+}
+
+// "00010203...96979899" cast to []uint16
+var intLELookup = [100]uint16{
+ 0x3030, 0x3130, 0x3230, 0x3330, 0x3430, 0x3530, 0x3630, 0x3730, 0x3830, 0x3930,
+ 0x3031, 0x3131, 0x3231, 0x3331, 0x3431, 0x3531, 0x3631, 0x3731, 0x3831, 0x3931,
+ 0x3032, 0x3132, 0x3232, 0x3332, 0x3432, 0x3532, 0x3632, 0x3732, 0x3832, 0x3932,
+ 0x3033, 0x3133, 0x3233, 0x3333, 0x3433, 0x3533, 0x3633, 0x3733, 0x3833, 0x3933,
+ 0x3034, 0x3134, 0x3234, 0x3334, 0x3434, 0x3534, 0x3634, 0x3734, 0x3834, 0x3934,
+ 0x3035, 0x3135, 0x3235, 0x3335, 0x3435, 0x3535, 0x3635, 0x3735, 0x3835, 0x3935,
+ 0x3036, 0x3136, 0x3236, 0x3336, 0x3436, 0x3536, 0x3636, 0x3736, 0x3836, 0x3936,
+ 0x3037, 0x3137, 0x3237, 0x3337, 0x3437, 0x3537, 0x3637, 0x3737, 0x3837, 0x3937,
+ 0x3038, 0x3138, 0x3238, 0x3338, 0x3438, 0x3538, 0x3638, 0x3738, 0x3838, 0x3938,
+ 0x3039, 0x3139, 0x3239, 0x3339, 0x3439, 0x3539, 0x3639, 0x3739, 0x3839, 0x3939,
+}
+
+var intBELookup = [100]uint16{
+ 0x3030, 0x3031, 0x3032, 0x3033, 0x3034, 0x3035, 0x3036, 0x3037, 0x3038, 0x3039,
+ 0x3130, 0x3131, 0x3132, 0x3133, 0x3134, 0x3135, 0x3136, 0x3137, 0x3138, 0x3139,
+ 0x3230, 0x3231, 0x3232, 0x3233, 0x3234, 0x3235, 0x3236, 0x3237, 0x3238, 0x3239,
+ 0x3330, 0x3331, 0x3332, 0x3333, 0x3334, 0x3335, 0x3336, 0x3337, 0x3338, 0x3339,
+ 0x3430, 0x3431, 0x3432, 0x3433, 0x3434, 0x3435, 0x3436, 0x3437, 0x3438, 0x3439,
+ 0x3530, 0x3531, 0x3532, 0x3533, 0x3534, 0x3535, 0x3536, 0x3537, 0x3538, 0x3539,
+ 0x3630, 0x3631, 0x3632, 0x3633, 0x3634, 0x3635, 0x3636, 0x3637, 0x3638, 0x3639,
+ 0x3730, 0x3731, 0x3732, 0x3733, 0x3734, 0x3735, 0x3736, 0x3737, 0x3738, 0x3739,
+ 0x3830, 0x3831, 0x3832, 0x3833, 0x3834, 0x3835, 0x3836, 0x3837, 0x3838, 0x3839,
+ 0x3930, 0x3931, 0x3932, 0x3933, 0x3934, 0x3935, 0x3936, 0x3937, 0x3938, 0x3939,
+}
+
+var intLookup = [2]*[100]uint16{&intLELookup, &intBELookup}
+
+func AppendInt(out []byte, u64 uint64, code *Opcode) []byte {
+ n := u64 & code.Mask
+ negative := (u64>>code.RshiftNum)&1 == 1
+ if !negative {
+ if n < 10 {
+ return append(out, byte(n+'0'))
+ } else if n < 100 {
+ u := intLELookup[n]
+ return append(out, byte(u), byte(u>>8))
+ }
+ } else {
+ n = -n & code.Mask
+ }
+
+ lookup := intLookup[endianness]
+
+ var b [22]byte
+ u := (*[11]uint16)(unsafe.Pointer(&b))
+ i := 11
+
+ for n >= 100 {
+ j := n % 100
+ n /= 100
+ i--
+ u[i] = lookup[j]
+ }
+
+ i--
+ u[i] = lookup[n]
+
+ i *= 2 // convert to byte index
+ if n < 10 {
+ i++ // remove leading zero
+ }
+ if negative {
+ i--
+ b[i] = '-'
+ }
+
+ return append(out, b[i:]...)
+}
+
+func AppendUint(out []byte, u64 uint64, code *Opcode) []byte {
+ n := u64 & code.Mask
+ if n < 10 {
+ return append(out, byte(n+'0'))
+ } else if n < 100 {
+ u := intLELookup[n]
+ return append(out, byte(u), byte(u>>8))
+ }
+
+ lookup := intLookup[endianness]
+
+ var b [22]byte
+ u := (*[11]uint16)(unsafe.Pointer(&b))
+ i := 11
+
+ for n >= 100 {
+ j := n % 100
+ n /= 100
+ i--
+ u[i] = lookup[j]
+ }
+
+ i--
+ u[i] = lookup[n]
+
+ i *= 2 // convert to byte index
+ if n < 10 {
+ i++ // remove leading zero
+ }
+ return append(out, b[i:]...)
+}