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Fixes #25
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,158 @@ | ||
| package msgpack | ||
|
|
||
| // https://github.com/msgpack/msgpack/blob/master/spec.md | ||
|
|
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| // TODO: ext types done correctly? | ||
|
|
||
| import ( | ||
| "embed" | ||
|
|
||
| "github.com/wader/fq/format" | ||
| "github.com/wader/fq/format/registry" | ||
| "github.com/wader/fq/pkg/decode" | ||
| "github.com/wader/fq/pkg/scalar" | ||
| ) | ||
|
|
||
| //go:embed *.jq | ||
| var msgPackFS embed.FS | ||
|
|
||
| func init() { | ||
| registry.MustRegister(decode.Format{ | ||
| Name: format.MSGPACK, | ||
| Description: "MessagePack", | ||
| DecodeFn: decodeMsgPack, | ||
| Files: msgPackFS, | ||
| }) | ||
| } | ||
|
|
||
| type formatEntry struct { | ||
| r [2]byte | ||
| s scalar.S | ||
| d func(d *decode.D) | ||
| } | ||
|
|
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| type formatEntries []formatEntry | ||
|
|
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| func (fes formatEntries) lookup(u byte) (formatEntry, bool) { | ||
| for _, fe := range fes { | ||
| if u >= fe.r[0] && u <= fe.r[1] { | ||
| return fe, true | ||
| } | ||
| } | ||
| return formatEntry{}, false | ||
| } | ||
|
|
||
| func (fes formatEntries) MapScalar(s scalar.S) (scalar.S, error) { | ||
| u := s.ActualU() | ||
| if fe, ok := fes.lookup(byte(u)); ok { | ||
| s = fe.s | ||
| s.Actual = u | ||
| } | ||
| return s, nil | ||
| } | ||
|
|
||
| func decodeMsgPackValue(d *decode.D) { | ||
| arrayFn := func(seekBits int64, lengthBits int) func(d *decode.D) { | ||
| return func(d *decode.D) { | ||
| d.SeekRel(seekBits) | ||
| length := d.FieldU("length", lengthBits) | ||
| d.FieldArray("elements", func(d *decode.D) { | ||
| for i := uint64(0); i < length; i++ { | ||
| d.FieldStruct("element", decodeMsgPackValue) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
| mapFn := func(seekBits int64, lengthBits int) func(d *decode.D) { | ||
| return func(d *decode.D) { | ||
| d.SeekRel(seekBits) | ||
| length := d.FieldU("length", lengthBits) | ||
| d.FieldArray("pairs", func(d *decode.D) { | ||
| for i := uint64(0); i < length; i++ { | ||
| d.FieldStruct("pair", func(d *decode.D) { | ||
| d.FieldStruct("key", decodeMsgPackValue) | ||
| d.FieldStruct("value", decodeMsgPackValue) | ||
| }) | ||
| } | ||
| }) | ||
| } | ||
| } | ||
| extFn := func(lengthBits int) func(d *decode.D) { | ||
| return func(d *decode.D) { | ||
| length := d.FieldU8("length") | ||
| d.FieldS8("fixtype") | ||
| d.FieldRawLen("value", int64(length)*8) | ||
| } | ||
| } | ||
|
|
||
| // is defined here as a global map would cause a init dependency cycle | ||
| formatMap := formatEntries{ | ||
| {r: [2]byte{0x00, 0x7f}, s: scalar.S{Sym: "positive_fixint"}, d: func(d *decode.D) { | ||
| d.SeekRel(-8) | ||
| d.FieldU8("value") | ||
| }}, | ||
| {r: [2]byte{0x80, 0x8f}, s: scalar.S{Sym: "fixmap"}, d: mapFn(-4, 4)}, | ||
| {r: [2]byte{0x90, 0x9f}, s: scalar.S{Sym: "fixarray"}, d: arrayFn(-4, 4)}, | ||
| {r: [2]byte{0xa0, 0xbf}, s: scalar.S{Sym: "fixstr"}, d: func(d *decode.D) { | ||
| d.SeekRel(-4) | ||
| length := d.FieldU4("length") | ||
| d.FieldUTF8("value", int(length)) | ||
| }}, | ||
| {r: [2]byte{0xc0, 0xc0}, s: scalar.S{Sym: "nil"}, d: func(d *decode.D) { | ||
| // TODO: fq has no good null type atm | ||
| }}, | ||
| {r: [2]byte{0xc1, 0xc1}, s: scalar.S{Sym: "never_used"}, d: func(d *decode.D) { | ||
| d.Fatalf("0xc1 never used") | ||
| }}, | ||
| {r: [2]byte{0xc2, 0xc2}, s: scalar.S{Sym: "false"}, d: func(d *decode.D) { | ||
| d.FieldValueBool("value", false) | ||
| }}, | ||
| {r: [2]byte{0xc3, 0xc3}, s: scalar.S{Sym: "true"}, d: func(d *decode.D) { | ||
| d.FieldValueBool("value", true) | ||
| }}, | ||
| {r: [2]byte{0xc4, 0xc4}, s: scalar.S{Sym: "bin8"}, d: func(d *decode.D) { d.FieldRawLen("value", int64(d.FieldU8("length"))*8) }}, | ||
| {r: [2]byte{0xc5, 0xc5}, s: scalar.S{Sym: "bin16"}, d: func(d *decode.D) { d.FieldRawLen("value", int64(d.FieldU16("length"))*8) }}, | ||
| {r: [2]byte{0xc6, 0xc6}, s: scalar.S{Sym: "bin32"}, d: func(d *decode.D) { d.FieldRawLen("value", int64(d.FieldU32("length"))*8) }}, | ||
| {r: [2]byte{0xc7, 0xc7}, s: scalar.S{Sym: "ext8"}, d: extFn(8)}, | ||
| {r: [2]byte{0xc8, 0xc8}, s: scalar.S{Sym: "ext16"}, d: extFn(16)}, | ||
| {r: [2]byte{0xc9, 0xc9}, s: scalar.S{Sym: "ext32"}, d: extFn(32)}, | ||
| {r: [2]byte{0xca, 0xca}, s: scalar.S{Sym: "float32"}, d: func(d *decode.D) { d.FieldF32("value") }}, | ||
| {r: [2]byte{0xcb, 0xcb}, s: scalar.S{Sym: "float64"}, d: func(d *decode.D) { d.FieldF64("value") }}, | ||
| {r: [2]byte{0xcc, 0xcc}, s: scalar.S{Sym: "uint8"}, d: func(d *decode.D) { d.FieldU8("value") }}, | ||
| {r: [2]byte{0xcd, 0xcd}, s: scalar.S{Sym: "uint16"}, d: func(d *decode.D) { d.FieldU16("value") }}, | ||
| {r: [2]byte{0xce, 0xce}, s: scalar.S{Sym: "uint32"}, d: func(d *decode.D) { d.FieldU32("value") }}, | ||
| {r: [2]byte{0xcf, 0xcf}, s: scalar.S{Sym: "uint64"}, d: func(d *decode.D) { d.FieldU64("value") }}, | ||
| {r: [2]byte{0xd0, 0xd0}, s: scalar.S{Sym: "int8"}, d: func(d *decode.D) { d.FieldS8("value") }}, | ||
| {r: [2]byte{0xd1, 0xd1}, s: scalar.S{Sym: "int16"}, d: func(d *decode.D) { d.FieldS16("value") }}, | ||
| {r: [2]byte{0xd2, 0xd2}, s: scalar.S{Sym: "int32"}, d: func(d *decode.D) { d.FieldS32("value") }}, | ||
| {r: [2]byte{0xd3, 0xd3}, s: scalar.S{Sym: "int64"}, d: func(d *decode.D) { d.FieldS64("value") }}, | ||
| {r: [2]byte{0xd4, 0xd4}, s: scalar.S{Sym: "fixext1"}, d: func(d *decode.D) { d.FieldS8("fixtype"); d.FieldRawLen("value", 1*8) }}, | ||
| {r: [2]byte{0xd5, 0xd5}, s: scalar.S{Sym: "fixext2"}, d: func(d *decode.D) { d.FieldS8("fixtype"); d.FieldRawLen("value", 2*8) }}, | ||
| {r: [2]byte{0xd6, 0xd6}, s: scalar.S{Sym: "fixext4"}, d: func(d *decode.D) { d.FieldS8("fixtype"); d.FieldRawLen("value", 4*8) }}, | ||
| {r: [2]byte{0xd7, 0xd7}, s: scalar.S{Sym: "fixext8"}, d: func(d *decode.D) { d.FieldS8("fixtype"); d.FieldRawLen("value", 8*8) }}, | ||
| {r: [2]byte{0xd8, 0xd8}, s: scalar.S{Sym: "fixext16"}, d: func(d *decode.D) { d.FieldS8("fixtype"); d.FieldRawLen("value", 16*8) }}, | ||
| {r: [2]byte{0xd9, 0xd9}, s: scalar.S{Sym: "str8"}, d: func(d *decode.D) { d.FieldUTF8("value", int(d.FieldU8("length"))) }}, | ||
| {r: [2]byte{0xda, 0xda}, s: scalar.S{Sym: "str16"}, d: func(d *decode.D) { d.FieldUTF8("value", int(d.FieldU16("length"))) }}, | ||
| {r: [2]byte{0xdb, 0xdb}, s: scalar.S{Sym: "str32"}, d: func(d *decode.D) { d.FieldUTF8("value", int(d.FieldU32("length"))) }}, | ||
| {r: [2]byte{0xdc, 0xdc}, s: scalar.S{Sym: "array16"}, d: arrayFn(0, 16)}, | ||
| {r: [2]byte{0xdd, 0xdd}, s: scalar.S{Sym: "array32"}, d: arrayFn(0, 32)}, | ||
| {r: [2]byte{0xde, 0xde}, s: scalar.S{Sym: "map16"}, d: mapFn(0, 16)}, | ||
| {r: [2]byte{0xdf, 0xdf}, s: scalar.S{Sym: "map32"}, d: mapFn(0, 32)}, | ||
| {r: [2]byte{0xe0, 0xff}, s: scalar.S{Sym: "negative_fixint"}, d: func(d *decode.D) { | ||
| d.SeekRel(-8) | ||
| d.FieldS8("value") | ||
| }}, | ||
| } | ||
|
|
||
| typ := d.FieldU8("type", formatMap, scalar.Hex) | ||
| if fe, ok := formatMap.lookup(byte(typ)); ok { | ||
| fe.d(d) | ||
| } else { | ||
| panic("unreachable") | ||
| } | ||
| } | ||
|
|
||
| func decodeMsgPack(d *decode.D, in interface{}) interface{} { | ||
| decodeMsgPackValue(d) | ||
| return nil | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,13 @@ | ||
| def msgpack_torepr: | ||
| def _f: | ||
| ( if .type | . == "fixmap" or . == "map16" or . == "map32" then | ||
| ( .pairs | ||
| | map({key: (.key | _f), value: (.value | _f)}) | ||
| | from_entries | ||
| ) | ||
| elif .type | . == "fixarray" or . == "array16" or . == "array32" then .elements | map(_f) | ||
| elif .type | . == "bin8" or . == "bin16" or . == "bin32" then .value | tostring | ||
| else .value | ||
| end | ||
| ); | ||
| _f; |
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