mirror of
https://github.com/wader/fq.git
synced 2024-11-29 23:27:12 +03:00
365 lines
9.9 KiB
Go
365 lines
9.9 KiB
Go
package interp
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import (
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"errors"
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"fmt"
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"io"
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"strconv"
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"strings"
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"github.com/wader/fq/internal/asciiwriter"
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"github.com/wader/fq/internal/columnwriter"
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"github.com/wader/fq/internal/hexpairwriter"
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"github.com/wader/fq/internal/num"
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"github.com/wader/fq/pkg/bitio"
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"github.com/wader/fq/pkg/decode"
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"github.com/wader/fq/pkg/scalar"
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)
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// 0 12 34 56
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// addr|hexdump|ascii|field
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const (
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colAddr = 0
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colHex = 2
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colASCII = 4
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colField = 6
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)
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func isCompound(v *decode.Value) bool {
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switch v.V.(type) {
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case *decode.Compound:
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return true
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default:
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return false
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}
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}
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func dumpEx(v *decode.Value, buf []byte, cw *columnwriter.Writer, depth int, rootV *decode.Value, rootDepth int, addrWidth int, opts Options) error {
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deco := opts.Decorator
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// no error check as we write into buffering column
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// we check for err later for Flush()
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cprint := func(c int, a ...interface{}) {
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fmt.Fprint(cw.Columns[c], a...)
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}
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cfmt := func(c int, format string, a ...interface{}) {
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fmt.Fprintf(cw.Columns[c], format, a...)
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}
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columns := func() {
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cprint(1, deco.Column, "\n")
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cprint(3, deco.Column, "\n")
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cprint(5, deco.Column, "\n")
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}
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var hexHeader string
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var asciiHeader string
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if depth == 0 {
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for i := 0; i < opts.LineBytes; i++ {
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s := num.PadFormatInt(int64(i), opts.AddrBase, false, 2)
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hexHeader += s
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if i < opts.LineBytes-1 {
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hexHeader += " "
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}
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asciiHeader += s[len(s)-1:]
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}
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}
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isInArray := false
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inArrayLen := 0
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if v.Parent != nil {
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if dc, ok := v.Parent.V.(*decode.Compound); ok {
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isInArray = dc.IsArray
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inArrayLen = len(dc.Children)
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}
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}
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nameV := v
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name := nameV.Name
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if isInArray {
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nameV = v.Parent
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name = ""
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}
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if depth == 0 {
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name = valuePathDecorated(nameV, deco)
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} else {
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name = deco.ObjectKey.Wrap(name)
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}
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rootIndent := strings.Repeat(" ", rootDepth)
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indent := strings.Repeat(" ", depth)
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if depth == 0 {
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if !isCompound(v) {
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columns()
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}
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cfmt(colHex, "%s", deco.DumpHeader.F(hexHeader))
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cfmt(colASCII, "%s", deco.DumpHeader.F(asciiHeader))
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if !isCompound(v) {
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cw.Flush()
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}
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}
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if opts.ArrayTruncate != 0 && depth != 0 && isInArray && v.Index >= opts.ArrayTruncate {
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columns()
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cfmt(colField, "%s%s%s:%s%s: ...",
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indent,
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deco.Index.F("["),
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deco.Number.F(strconv.Itoa(v.Index)),
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deco.Number.F(strconv.Itoa(inArrayLen-1)),
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deco.Index.F("]"),
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)
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cw.Flush()
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return decode.ErrWalkBreak
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}
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cfmt(colField, "%s%s", indent, name)
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if isInArray {
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cfmt(colField, "%s%s%s", deco.Index.F("["), deco.Number.F(strconv.Itoa(v.Index)), deco.Index.F("]"))
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}
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cprint(colField, ":")
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if opts.Verbose && isInArray {
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cfmt(colField, " %s", v.Name)
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}
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var valueErr error
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// TODO: cleanup map[string]interface{} []interface{} or json format
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// dump should use some internal interface instead?
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switch vv := v.V.(type) {
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case *decode.Compound:
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if vv.IsArray {
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cfmt(colField, " %s%s%s", deco.Index.F("["), deco.Number.F(strconv.Itoa(len(vv.Children))), deco.Index.F("]"))
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} else {
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cfmt(colField, " %s", deco.Object.F("{}"))
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}
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if vv.Description != "" {
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cfmt(colField, " %s", deco.Value.F(vv.Description))
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}
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if vv.Format != nil {
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cfmt(colField, " (%s)", deco.Value.F(vv.Format.Name))
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}
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valueErr = vv.Err
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case *scalar.S:
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// TODO: rethink scalar array/struct (json format)
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switch av := vv.Actual.(type) {
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case map[string]interface{}:
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cfmt(colField, " %s (%s)", deco.Object.F("{}"), deco.Value.F("json"))
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case []interface{}:
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cfmt(colField, " %s%s%s (%s)", deco.Index.F("["), deco.Number.F(strconv.Itoa(len(av))), deco.Index.F("]"), deco.Value.F("json"))
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default:
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cfmt(colField, " %s", deco.ValueColor(vv.Value()).F(previewValue(vv.Value(), vv.DisplayFormat)))
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if vv.Sym != nil {
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cfmt(colField, " (%s)", deco.ValueColor(vv.Actual).F(previewValue(vv.Actual, vv.DisplayFormat)))
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}
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// TODO: similar to struct/array?
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if vv.Description != "" {
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cfmt(colField, fmt.Sprintf(" (%s)", deco.Value.F(vv.Description)))
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}
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}
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default:
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panic(fmt.Sprintf("unreachable vv %#+v", vv))
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}
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innerRange := v.InnerRange()
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if opts.Verbose {
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cfmt(colField, " %s (%s)",
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num.BitRange(innerRange).StringByteBits(opts.AddrBase), num.Bits(innerRange.Len).StringByteBits(opts.SizeBase))
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}
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cprint(colField, "\n")
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if valueErr != nil {
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var printErrs func(depth int, err error)
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printErrs = func(depth int, err error) {
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indent := strings.Repeat(" ", depth)
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var formatErr decode.FormatError
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var decodeFormatsErr decode.FormatsError
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switch {
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case errors.As(err, &formatErr):
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columns()
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cfmt(colField, "%s %s: %s: %s\n", indent, deco.Error.F("error"), formatErr.Format.Name, formatErr.Err.Error())
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if opts.Verbose {
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for _, f := range formatErr.Stacktrace.Frames() {
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columns()
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cfmt(colField, "%s %s\n", indent, f.Function)
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columns()
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cfmt(colField, "%s %s:%d\n", indent, f.File, f.Line)
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}
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}
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switch {
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case errors.Is(formatErr.Err, decode.FormatsError{}):
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printErrs(depth+1, formatErr.Err)
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}
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case errors.As(err, &decodeFormatsErr):
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cfmt(colField, "%s %s\n", indent, err)
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for _, e := range decodeFormatsErr.Errs {
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printErrs(depth+1, e)
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}
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default:
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columns()
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cfmt(colField, "%s!%s\n", indent, deco.Error.F(err.Error()))
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}
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}
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printErrs(depth, valueErr)
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}
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bufferLastBit := rootV.RootBitBuf.Len() - 1
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startBit := innerRange.Start
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stopBit := innerRange.Stop() - 1
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sizeBits := innerRange.Len
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lastDisplayBit := stopBit
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if opts.DisplayBytes > 0 && sizeBits > int64(opts.DisplayBytes)*8 {
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lastDisplayBit = startBit + (int64(opts.DisplayBytes)*8 - 1)
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if lastDisplayBit%(int64(opts.LineBytes)*8) != 0 {
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lastDisplayBit += (int64(opts.LineBytes) * 8) - lastDisplayBit%(int64(opts.LineBytes)*8) - 1
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}
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if lastDisplayBit > stopBit || stopBit-lastDisplayBit <= int64(opts.LineBytes)*8 {
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lastDisplayBit = stopBit
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}
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}
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bufferLastByte := bufferLastBit / 8
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startByte := startBit / 8
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stopByte := stopBit / 8
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lastDisplayByte := lastDisplayBit / 8
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displaySizeBytes := lastDisplayByte - startByte + 1
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displaySizeBits := displaySizeBytes * 8
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maxDisplaySizeBits := bufferLastBit - startByte*8 + 1
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if sizeBits == 0 {
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displaySizeBits = 0
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}
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if displaySizeBits > maxDisplaySizeBits {
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displaySizeBits = maxDisplaySizeBits
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}
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startLine := startByte / int64(opts.LineBytes)
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startLineByteOffset := startByte % int64(opts.LineBytes)
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startLineByte := startLine * int64(opts.LineBytes)
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lastDisplayLine := lastDisplayByte / int64(opts.LineBytes)
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columns()
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// has length and is not compound or a collapsed struct/array (max depth)
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if innerRange.Len > 0 && (!isCompound(v) || (opts.Depth != 0 && opts.Depth == depth)) {
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cfmt(colAddr, "%s%s\n",
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rootIndent, deco.DumpAddr.F(num.PadFormatInt(startLineByte, opts.AddrBase, true, addrWidth)))
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vBitBuf, err := rootV.RootBitBuf.BitBufRange(startByte*8, displaySizeBits)
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if err != nil {
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return err
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}
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addrLines := lastDisplayLine - startLine + 1
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hexpairFn := func(b byte) string { return deco.ByteColor(b).Wrap(hexpairwriter.Pair(b)) }
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asciiFn := func(b byte) string { return deco.ByteColor(b).Wrap(asciiwriter.SafeASCII(b)) }
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if vBitBuf != nil {
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if _, err := io.CopyBuffer(
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hexpairwriter.New(cw.Columns[colHex], opts.LineBytes, int(startLineByteOffset), hexpairFn),
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io.LimitReader(vBitBuf.Clone(), displaySizeBytes),
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buf); err != nil {
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return err
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}
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if _, err := io.CopyBuffer(
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asciiwriter.New(cw.Columns[colASCII], opts.LineBytes, int(startLineByteOffset), asciiFn),
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io.LimitReader(vBitBuf.Clone(), displaySizeBytes),
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buf); err != nil {
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return err
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}
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}
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for i := int64(1); i < addrLines; i++ {
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lineStartByte := startLineByte + i*int64(opts.LineBytes)
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columns()
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cfmt(colAddr, "%s%s\n", rootIndent, deco.DumpAddr.F(num.PadFormatInt(lineStartByte, opts.AddrBase, true, addrWidth)))
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}
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// TODO: correct? should rethink columnwriter api maybe?
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lastLineStopByte := startLineByte + addrLines*int64(opts.LineBytes) - 1
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if lastDisplayByte == bufferLastByte && lastDisplayByte != lastLineStopByte {
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// extra "|" in as EOF markers
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cfmt(colHex, "%s\n", deco.Column)
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cfmt(colASCII, "%s\n", deco.Column)
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}
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if stopByte != lastDisplayByte {
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isEnd := ""
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if stopBit == bufferLastBit {
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isEnd = " (end)"
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}
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columns()
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cfmt(colAddr, "%s%s\n", rootIndent, deco.DumpAddr.F("*"))
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cprint(colHex, "\n")
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// TODO: truncate if display_bytes is small?
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cfmt(colHex, "until %s%s (%s)",
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num.Bits(stopBit).StringByteBits(opts.AddrBase),
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isEnd,
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num.PadFormatInt(bitio.BitsByteCount(sizeBits), opts.SizeBase, true, 0))
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// TODO: dump last line?
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}
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}
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if err := cw.Flush(); err != nil {
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return err
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}
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return nil
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}
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func dump(v *decode.Value, w io.Writer, opts Options) error {
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maxAddrIndentWidth := 0
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makeWalkFn := func(fn decode.WalkFn) decode.WalkFn {
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return func(v *decode.Value, rootV *decode.Value, depth int, rootDepth int) error {
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if opts.Depth != 0 && depth > opts.Depth {
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return decode.ErrWalkSkipChildren
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}
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return fn(v, rootV, depth, rootDepth)
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}
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}
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_ = v.WalkPreOrder(makeWalkFn(func(v *decode.Value, rootV *decode.Value, depth int, rootDepth int) error {
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maxAddrIndentWidth = num.MaxInt(
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maxAddrIndentWidth,
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rootDepth+num.DigitsInBase(bitio.BitsByteCount(v.InnerRange().Stop()), true, opts.AddrBase),
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)
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return nil
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}))
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cw := columnwriter.New(w, []int{maxAddrIndentWidth, 1, opts.LineBytes*3 - 1, 1, opts.LineBytes, 1, -1})
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buf := make([]byte, 32*1024)
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return v.WalkPreOrder(makeWalkFn(func(v *decode.Value, rootV *decode.Value, depth int, rootDepth int) error {
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return dumpEx(v, buf, cw, depth, rootV, rootDepth, maxAddrIndentWidth-rootDepth, opts)
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}))
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}
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func hexdump(w io.Writer, bv Buffer, opts Options) error {
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bb, err := bv.toBuffer()
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if err != nil {
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return err
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}
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// TODO: hack
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opts.Verbose = true
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return dump(
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&decode.Value{
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// TODO: hack
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V: &scalar.S{Actual: bb},
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Range: bv.r,
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RootBitBuf: bv.bb.Clone(),
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},
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w,
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opts,
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)
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}
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