From a990e05069b3e56853870d3a94f546198bc14dde111bf99c78951a2b5b2926d8 Mon Sep 17 00:00:00 2001
From: Anton Rudenko <rudenko.ad@phystech.edu>
Date: Thu, 30 Jan 2025 15:31:31 +0300
Subject: [PATCH] add new error types

---
 go/atom-decode.go | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/go/atom-decode.go b/go/atom-decode.go
index 98e62ab..0cbcc53 100644
--- a/go/atom-decode.go
+++ b/go/atom-decode.go
@@ -35,6 +35,10 @@ var (
 	ErrBadUTF8       = errors.New("invalid UTF-8")
 	ErrBadInt        = errors.New("bad int value")
 	ErrBadMagic      = errors.New("bad magic value")
+	ErrTaiReserved   = errors.New("reserved TAI64 values in use")
+	ErrTaiNonMinimal = errors.New("non-minimal TAI64")
+	ErrTooManyNsecs  = errors.New("too many nanoseconds")
+	ErrTooManyAsecs  = errors.New("too many attoseconds")
 )
 
 func (ctx *Decoder) DecodeAtom() (t types.Type, err error) {
@@ -208,28 +212,28 @@ func (ctx *Decoder) DecodeAtom() (t types.Type, err error) {
 			return
 		}
 		if be.Get([]byte(s)[:8]) > (1 << 63) {
-			err = errors.New("reserved TAI64 values in use")
+			err = ErrTaiReserved
 			return
 		}
 		if l > 8 {
 			nsecs := be.Get([]byte(s)[8 : 8+4])
 			if l == 12 && nsecs == 0 {
-				err = errors.New("non-minimal TAI64N")
+				err = ErrTaiNonMinimal
 				return
 			}
 			if nsecs > 999999999 {
-				err = errors.New("too many nanoseconds")
+				err = ErrTooManyNsecs
 				return
 			}
 		}
 		if l > 12 {
 			asecs := be.Get([]byte(s)[8+4 : 8+4+4])
 			if asecs == 0 {
-				err = errors.New("non-minimal TAI64NA")
+				err = ErrTaiNonMinimal
 				return
 			}
 			if asecs > 999999999 {
-				err = errors.New("too many attoseconds")
+				err = ErrTooManyAsecs
 				return
 			}
 		}
-- 
2.50.0