mirror of
https://github.com/soypat/lneto.git
synced 2026-07-26 10:38:47 +00:00
Pat Whittingslow
376e1a0b4f
* work on tracking more heap allocations down * write own heapless IP AppendFormatAddr functions * remove potential Error method allocations * more logging
96 lines
2.0 KiB
Go
96 lines
2.0 KiB
Go
package lneto
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import (
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"errors"
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"fmt"
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"strconv"
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)
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type ValidateFlags uint64
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const (
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validateReserved ValidateFlags = 1 << iota
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ValidateEvilBit
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validateAllowMultiErrors
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)
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func (vf ValidateFlags) has(v ValidateFlags) bool {
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return vf&v == v
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}
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type Validator struct {
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accum []error
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accumBitpos []BitPosErr
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flags ValidateFlags
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}
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func (v *Validator) Flags() ValidateFlags {
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return v.flags
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}
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func (v *Validator) ResetErr() {
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v.accum = v.accum[:0]
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v.accumBitpos = v.accumBitpos[:0]
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}
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func (v *Validator) HasError() bool {
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if v.flags.has(validateReserved) {
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panic("reserved bit set")
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}
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return len(v.accum) != 0
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}
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// ErrPop returns the error(s) accumulated in the validator and clears them.
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func (v *Validator) ErrPop() (err error) {
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if len(v.accum) == 1 {
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err = v.accum[0]
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v.ResetErr()
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} else if len(v.accum) > 0 {
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err = errors.Join(v.accum...)
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v.ResetErr()
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}
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return err
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}
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func (v *Validator) gotErr(err error) {
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v.accum = append(v.accum, err)
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}
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func (v *Validator) AddError(err error) {
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if err == nil {
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panic("error argument to AddError cannot be nil")
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} else if len(v.accum) != 0 && !v.flags.has(validateAllowMultiErrors) {
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return
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}
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v.accum = append(v.accum, err)
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}
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func (v *Validator) AddBitPosErr(bitStart, bitLen int, err error) {
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if err == nil {
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panic("err argument to bitPosErr cannot be nil")
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} else if bitLen <= 0 {
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panic("zero bitlen")
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}
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v.accumBitpos = append(v.accumBitpos, BitPosErr{BitStart: bitStart, BitLen: bitLen, Err: err})
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v.accum = append(v.accum, &v.accumBitpos[len(v.accumBitpos)-1])
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}
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type BitPosErr struct {
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BitStart int
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BitLen int
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Err error
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}
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func (bpe *BitPosErr) Error() string {
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return fmt.Sprintf("%s at bits %d..%d", bpe.Err.Error(), bpe.BitStart, bpe.BitStart+bpe.BitLen)
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}
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func (bpe *BitPosErr) AppendError(dst []byte) []byte {
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dst = append(dst, bpe.Err.Error()...)
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dst = append(dst, ": bits "...)
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dst = strconv.AppendUint(dst, uint64(bpe.BitStart), 10)
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dst = append(dst, '.', '.')
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dst = strconv.AppendUint(dst, uint64(bpe.BitStart+bpe.BitLen), 10)
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return dst
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}
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