mirror of
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281 lines
7.2 KiB
Go
281 lines
7.2 KiB
Go
package scalar
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// TODO: d.Pos check err
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// TODO: fn for actual?
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// TODO: dsl import .? own scalar package?
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// TODO: better IOError op names
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import (
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"bytes"
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"fmt"
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"strconv"
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"strings"
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"time"
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"github.com/wader/fq/internal/bitiox"
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"github.com/wader/fq/pkg/bitio"
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)
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//go:generate sh -c "cat scalar_gen.go.tmpl | go run ../../dev/tmpl.go ../decode/types.json | gofmt > scalar_gen.go"
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type Scalarable interface {
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ScalarActual() any
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ScalarValue() any
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ScalarSym() any
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ScalarDescription() string
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ScalarFlags() Flags
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ScalarDisplayFormat() DisplayFormat
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}
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type DisplayFormat int
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const (
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NumberDecimal DisplayFormat = iota
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NumberBinary
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NumberOctal
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NumberHex
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)
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func (df DisplayFormat) FormatBase() int {
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switch df {
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case NumberDecimal:
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return 10
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case NumberBinary:
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return 2
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case NumberOctal:
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return 8
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case NumberHex:
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return 16
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default:
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return 0
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}
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}
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const (
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FlagGap Flags = 1 << iota
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FlagSynthetic
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)
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type Flags uint
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func (f Flags) IsGap() bool { return f&FlagGap != 0 }
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func (f Flags) IsSynthetic() bool { return f&FlagSynthetic != 0 }
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// TODO: todos
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// rename raw?
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// crc
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//
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//
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// d.FieldU2("emphasis").
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// MapSym().
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// Actual
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// Sym
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// Value()
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// Scalar()
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var UintBin = UintFn(func(s Uint) (Uint, error) { s.DisplayFormat = NumberBinary; return s, nil })
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var UintOct = UintFn(func(s Uint) (Uint, error) { s.DisplayFormat = NumberOctal; return s, nil })
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var UintDec = UintFn(func(s Uint) (Uint, error) { s.DisplayFormat = NumberDecimal; return s, nil })
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var UintHex = UintFn(func(s Uint) (Uint, error) { s.DisplayFormat = NumberHex; return s, nil })
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var SintBin = SintFn(func(s Sint) (Sint, error) { s.DisplayFormat = NumberBinary; return s, nil })
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var SintOct = SintFn(func(s Sint) (Sint, error) { s.DisplayFormat = NumberOctal; return s, nil })
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var SintDec = SintFn(func(s Sint) (Sint, error) { s.DisplayFormat = NumberDecimal; return s, nil })
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var SintHex = SintFn(func(s Sint) (Sint, error) { s.DisplayFormat = NumberHex; return s, nil })
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var BigIntBin = BigIntFn(func(s BigInt) (BigInt, error) { s.DisplayFormat = NumberBinary; return s, nil })
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var BigIntOct = BigIntFn(func(s BigInt) (BigInt, error) { s.DisplayFormat = NumberOctal; return s, nil })
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var BigIntDec = BigIntFn(func(s BigInt) (BigInt, error) { s.DisplayFormat = NumberDecimal; return s, nil })
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var BigIntHex = BigIntFn(func(s BigInt) (BigInt, error) { s.DisplayFormat = NumberHex; return s, nil })
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func UintActualAdd(n int) UintActualFn {
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// TODO: use math.Add/Sub?
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return UintActualFn(func(a uint64) uint64 { return uint64(int64(a) + int64(n)) })
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}
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func SintActualAdd(n int) SintActualFn {
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return SintActualFn(func(a int64) int64 { return a + int64(n) })
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}
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func StrActualTrim(cutset string) StrActualFn {
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return StrActualFn(func(a string) string { return strings.Trim(a, cutset) })
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}
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var ActualTrimSpace = StrActualFn(strings.TrimSpace)
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func strMapToSym(fn func(s string) (any, error), try bool) StrMapper {
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return StrFn(func(s Str) (Str, error) {
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ts := strings.TrimSpace(s.Actual)
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n, err := fn(ts)
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if err != nil {
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if try {
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return s, nil
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}
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return s, err
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}
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s.Sym = n
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return s, nil
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})
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}
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func TryStrSymParseUint(base int) StrMapper {
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return strMapToSym(func(s string) (any, error) { return strconv.ParseUint(s, base, 64) }, true)
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}
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func TryStrSymParseInt(base int) StrMapper {
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return strMapToSym(func(s string) (any, error) { return strconv.ParseInt(s, base, 64) }, true)
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}
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func TryStrSymParseFloat(base int) StrMapper {
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return strMapToSym(func(s string) (any, error) { return strconv.ParseFloat(s, base) }, true)
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}
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func StrSymParseUint(base int) StrMapper {
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return strMapToSym(func(s string) (any, error) { return strconv.ParseUint(s, base, 64) }, false)
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}
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func StrSymParseInt(base int) StrMapper {
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return strMapToSym(func(s string) (any, error) { return strconv.ParseInt(s, base, 64) }, false)
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}
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func StrSymParseFloat(base int) StrMapper {
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return strMapToSym(func(s string) (any, error) { return strconv.ParseFloat(s, base) }, false)
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}
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type URangeEntry struct {
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Range [2]uint64
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S Uint
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}
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// UintRangeToScalar maps uint64 ranges to a scalar, first in range is chosen
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type UintRangeToScalar []URangeEntry
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func (rs UintRangeToScalar) MapUint(s Uint) (Uint, error) {
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n := s.Actual
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for _, re := range rs {
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if n >= re.Range[0] && n <= re.Range[1] {
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ns := re.S
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ns.Actual = s.Actual
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s = ns
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break
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}
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}
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return s, nil
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}
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// SRangeToScalar maps ranges to a scalar, first in range is chosen
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type SRangeEntry struct {
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Range [2]int64
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S Sint
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}
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// SRangeToScalar maps sint64 ranges to a scalar, first in range is chosen
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type SRangeToScalar []SRangeEntry
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func (rs SRangeToScalar) MapSint(s Sint) (Sint, error) {
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n := s.Actual
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for _, re := range rs {
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if n >= re.Range[0] && n <= re.Range[1] {
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ns := re.S
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ns.Actual = s.Actual
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s = ns
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break
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}
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}
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return s, nil
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}
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func RawSym(s BitBuf, nBytes int, fn func(b []byte) string) (BitBuf, error) {
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br := s.Actual
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brLen, err := bitiox.Len(br)
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if err != nil {
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return BitBuf{}, err
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}
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if nBytes < 0 {
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nBytes = int(brLen) / 8
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if brLen%8 != 0 {
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nBytes++
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}
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}
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if brLen < int64(nBytes)*8 {
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return s, nil
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}
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// TODO: shared somehow?
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b := make([]byte, nBytes)
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if _, err := br.ReadBitsAt(b, int64(nBytes)*8, 0); err != nil {
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return s, err
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}
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s.Sym = fn(b[0:nBytes])
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return s, nil
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}
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var RawUUID = BitBufFn(func(s BitBuf) (BitBuf, error) {
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return RawSym(s, -1, func(b []byte) string {
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return fmt.Sprintf("%x-%x-%x-%x-%x", b[0:4], b[4:6], b[6:8], b[8:10], b[10:])
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})
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})
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var RawHex = BitBufFn(func(s BitBuf) (BitBuf, error) {
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return RawSym(s, -1, func(b []byte) string { return fmt.Sprintf("%x", b) })
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})
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type RawBytesMap []struct {
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Bytes []byte
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Scalar BitBuf
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}
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func (m RawBytesMap) MapBitBuf(s BitBuf) (BitBuf, error) {
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rc, err := bitio.CloneReader(s.Actual)
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if err != nil {
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return s, err
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}
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bb := &bytes.Buffer{}
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if _, err := bitiox.CopyBits(bb, rc); err != nil {
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return s, err
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}
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for _, bs := range m {
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if bytes.Equal(bb.Bytes(), bs.Bytes) {
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ns := bs.Scalar
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ns.Actual = s.Actual
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s = ns
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break
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}
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}
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return s, nil
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}
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var unixTimeEpochDate = time.Date(1970, time.January, 1, 0, 0, 0, 0, time.UTC)
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func UintActualDateDescription(epoch time.Time, unit time.Duration, format string) UintFn {
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return UintFn(func(s Uint) (Uint, error) {
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s.Description = epoch.Add(time.Duration(s.Actual) * unit).Format(format)
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return s, nil
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})
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}
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func UintActualUnixTimeDescription(unit time.Duration, format string) UintFn {
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return UintActualDateDescription(unixTimeEpochDate, unit, format)
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}
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func SintActualDateDescription(epoch time.Time, unit time.Duration, format string) SintFn {
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return SintFn(func(s Sint) (Sint, error) {
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s.Description = epoch.Add(time.Duration(s.Actual) * unit).Format(format)
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return s, nil
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})
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}
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func SintActualUnixTimeDescription(unit time.Duration, format string) SintFn {
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return SintActualDateDescription(unixTimeEpochDate, unit, format)
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}
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func FltActualDateDescription(epoch time.Time, unit time.Duration, format string) FltFn {
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return FltFn(func(s Flt) (Flt, error) {
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s.Description = epoch.Add(time.Duration(s.Actual) * unit).Format(format)
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return s, nil
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})
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}
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func FltActualUnixTimeDescription(unit time.Duration, format string) FltFn {
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return FltActualDateDescription(unixTimeEpochDate, unit, format)
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}
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