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-rw-r--r--compiler/byte.go281
1 files changed, 0 insertions, 281 deletions
diff --git a/compiler/byte.go b/compiler/byte.go
deleted file mode 100644
index 464887e..0000000
--- a/compiler/byte.go
+++ /dev/null
@@ -1,281 +0,0 @@
-package compiler
-
-import "fmt"
-
-type byteRange struct {
- from byte
- to byte
-}
-
-func newByteRange(from, to byte) byteRange {
- return byteRange{
- from: from,
- to: to,
- }
-}
-
-func (r byteRange) String() string {
- return fmt.Sprintf("%X-%X (%v-%v)", r.from, r.to, r.from, r.to)
-}
-
-func newByteRangeSequence(from, to []byte) ([]byteRange, error) {
- if len(from) != len(to) {
- return nil, fmt.Errorf("length of `from` and `to` are mismatched; from: %+v, to: %+v", from, to)
- }
- seq := []byteRange{}
- for i := 0; i < len(from); i++ {
- seq = append(seq, newByteRange(from[i], to[i]))
- }
- return seq, nil
-}
-
-func excludeByteRangeSequence(b1, b2 []byteRange) [][]byteRange {
- if len(b1) != len(b2) {
- // no overlapping
- return [][]byteRange{b2}
- }
- switch len(b1) {
- case 1:
- return exclude1Byte(b1, b2)
- case 2:
- return exclude2Byte(b1, b2)
- case 3:
- return exclude3Byte(b1, b2)
- case 4:
- return exclude4Byte(b1, b2)
- }
- panic(fmt.Errorf("excludeByteRangeSequence can only handle sequences up to 4 bytes in size; b1: %+v, b2: %+v", b1, b2))
-}
-
-func exclude1Byte(b1, b2 []byteRange) [][]byteRange {
- r01, r02, overlapping0 := excludeByteRange(&b1[0], &b2[0])
- if !overlapping0 {
- // no overlapping
- return [][]byteRange{b2}
- }
- result := [][]byteRange{}
- {
- if r01 != nil {
- result = append(result, []byteRange{
- newByteRange(r01.from, r01.to),
- })
- }
- if r02 != nil {
- result = append(result, []byteRange{
- newByteRange(r02.from, r02.to),
- })
- }
- }
- return result
-}
-
-func exclude2Byte(b1, b2 []byteRange) [][]byteRange {
- r01, r02, overlapping0 := excludeByteRange(&b1[0], &b2[0])
- r11, r12, overlapping1 := excludeByteRange(&b1[1], &b2[1])
- if !overlapping0 || !overlapping1 {
- // no overlapping
- return [][]byteRange{b2}
- }
- result := [][]byteRange{}
- {
- if r11 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(r11.from, r11.to),
- })
- }
- if r12 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(r12.from, r12.to),
- })
- }
- if r01 != nil {
- result = append(result, []byteRange{
- newByteRange(r01.from, r01.to),
- newByteRange(b2[1].from, b2[1].to),
- })
- }
- if r02 != nil {
- result = append(result, []byteRange{
- newByteRange(r02.from, r02.to),
- newByteRange(b2[1].from, b2[1].to),
- })
- }
- }
- return result
-}
-
-func exclude3Byte(b1, b2 []byteRange) [][]byteRange {
- r01, r02, overlapping0 := excludeByteRange(&b1[0], &b2[0])
- r11, r12, overlapping1 := excludeByteRange(&b1[1], &b2[1])
- r21, r22, overlapping2 := excludeByteRange(&b1[2], &b2[2])
- if !overlapping0 || !overlapping1 || !overlapping2 {
- // no overlapping
- return [][]byteRange{b2}
- }
- result := [][]byteRange{}
- {
- if r21 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(b1[1].from, b1[1].to),
- newByteRange(r21.from, r21.to),
- })
- }
- if r22 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(b1[1].from, b1[1].to),
- newByteRange(r22.from, r22.to),
- })
- }
- if r11 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(r11.from, r11.to),
- newByteRange(b2[2].from, b2[2].to),
- })
- }
- if r12 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(r12.from, r12.to),
- newByteRange(b2[2].from, b2[2].to),
- })
- }
- if r01 != nil {
- result = append(result, []byteRange{
- newByteRange(r01.from, r01.to),
- newByteRange(b2[1].from, b2[1].to),
- newByteRange(b2[2].from, b2[2].to),
- })
- }
- if r02 != nil {
- result = append(result, []byteRange{
- newByteRange(r02.from, r02.to),
- newByteRange(b2[1].from, b2[1].to),
- newByteRange(b2[2].from, b2[2].to),
- })
- }
- }
- return result
-}
-
-func exclude4Byte(b1, b2 []byteRange) [][]byteRange {
- r01, r02, overlapping0 := excludeByteRange(&b1[0], &b2[0])
- r11, r12, overlapping1 := excludeByteRange(&b1[1], &b2[1])
- r21, r22, overlapping2 := excludeByteRange(&b1[2], &b2[2])
- r31, r32, overlapping3 := excludeByteRange(&b1[3], &b2[3])
- if !overlapping0 || !overlapping1 || !overlapping2 || !overlapping3 {
- // no overlapping
- return [][]byteRange{b2}
- }
- result := [][]byteRange{}
- {
- if r31 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(b1[1].from, b1[1].to),
- newByteRange(b1[2].from, b1[2].to),
- newByteRange(r31.from, r31.to),
- })
- }
- if r32 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(b1[1].from, b1[1].to),
- newByteRange(b1[2].from, b1[2].to),
- newByteRange(r32.from, r32.to),
- })
- }
- if r21 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(b1[1].from, b1[1].to),
- newByteRange(r21.from, r21.to),
- newByteRange(b2[3].from, b2[3].to),
- })
- }
- if r22 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(b1[1].from, b1[1].to),
- newByteRange(r22.from, r22.to),
- newByteRange(b2[3].from, b2[3].to),
- })
- }
- if r11 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(r11.from, r11.to),
- newByteRange(b2[2].from, b2[2].to),
- newByteRange(b2[3].from, b2[3].to),
- })
- }
- if r12 != nil {
- result = append(result, []byteRange{
- newByteRange(b1[0].from, b1[0].to),
- newByteRange(r12.from, r12.to),
- newByteRange(b2[2].from, b2[2].to),
- newByteRange(b2[3].from, b2[3].to),
- })
- }
- if r01 != nil {
- result = append(result, []byteRange{
- newByteRange(r01.from, r01.to),
- newByteRange(b2[1].from, b2[1].to),
- newByteRange(b2[2].from, b2[2].to),
- newByteRange(b2[3].from, b2[3].to),
- })
- }
- if r02 != nil {
- result = append(result, []byteRange{
- newByteRange(r02.from, r02.to),
- newByteRange(b2[1].from, b2[1].to),
- newByteRange(b2[2].from, b2[2].to),
- newByteRange(b2[3].from, b2[3].to),
- })
- }
- }
- return result
-}
-
-// excludeByteRange excludes `r1` from `r2`.
-func excludeByteRange(r1, r2 *byteRange) (*byteRange, *byteRange, bool) {
- if r1.from <= r2.from {
- if r1.to < r2.from {
- // no overlapping
- return nil, nil, false
- }
- if r1.to < r2.to {
- // The beginning of `r2` overlaps with `r1`.
- return &byteRange{
- from: r1.to + 1,
- to: r2.to,
- }, nil, true
- }
- // `symbol` overlaps with `base` entirely.
- return nil, nil, true
- }
- if r1.from > r2.to {
- // no overlapping
- return nil, nil, false
- }
- if r1.to >= r2.to {
- // The end of `r2` overlaps with `r1`.
- return &byteRange{
- from: r2.from,
- to: r1.from - 1,
- }, nil, true
- }
- // `r2` overlaps with `r1` entirely.
- return &byteRange{
- from: r2.from,
- to: r1.from - 1,
- },
- &byteRange{
- from: r1.to + 1,
- to: r2.to,
- }, true
-}
generated by cgit v1.2.3 (git 2.49.0) at 2025-07-12 22:47:19 +0000