From 477e56d3592fd0e81fccb3d8b65e409cfa539f95 Mon Sep 17 00:00:00 2001
From: Sasha Koshka <sashakoshka@tebibyte.media>
Date: Tue, 24 Jun 2025 14:37:45 -0400
Subject: [PATCH] tape: Add String method to Tag

---
 tape/tag.go | 36 ++++++++++++++++++++++++++----------
 1 file changed, 26 insertions(+), 10 deletions(-)

diff --git a/tape/tag.go b/tape/tag.go
index 4e9db37..b32898d 100644
--- a/tape/tag.go
+++ b/tape/tag.go
@@ -1,16 +1,18 @@
 package tape
 
+import "fmt"
+
 type Tag byte; const (
-	SI      Tag = 0 << 5  // Small integer
-	LI      Tag = 1 << 5  // Large integer
-	FP      Tag = 2 << 5  // Floating point
-	SBA     Tag = 3 << 5  // Small byte array
-	LBA     Tag = 4 << 5  // Large byte array
-	OTA     Tag = 5 << 5  // One-tag array
-	KTV     Tag = 6 << 5  // Key-tag-value table
-	TNMask  Tag = 0xE0    // The entire TN bitfield
-	CNMask  Tag = 0x20    // The entire CN bitfield
-	CNLimit Tag = 32      // All valid CNs are < CNLimit
+	SI      Tag = 0 << 5 // Small integer
+	LI      Tag = 1 << 5 // Large integer
+	FP      Tag = 2 << 5 // Floating point
+	SBA     Tag = 3 << 5 // Small byte array
+	LBA     Tag = 4 << 5 // Large byte array
+	OTA     Tag = 5 << 5 // One-tag array
+	KTV     Tag = 6 << 5 // Key-tag-value table
+	TNMask  Tag = 0xE0   // The entire TN bitfield
+	CNMask  Tag = 0x1F   // The entire CN bitfield
+	CNLimit Tag = 32     // All valid CNs are < CNLimit
 )
 
 func (tag Tag) TN() int {
@@ -33,6 +35,20 @@ func (tag Tag) Is(other Tag) bool {
 	return tag.TN() == other.TN()
 }
 
+func (tag Tag) String() string {
+	tn := fmt.Sprint(tag.TN())
+	switch tag.WithoutCN() {
+	case SI:  tn = "SI"
+	case LI:  tn = "LI"
+	case FP:  tn = "FP"
+	case SBA: tn = "SBA"
+	case LBA: tn = "LBA"
+	case OTA: tn = "OTA"
+	case KTV: tn = "KTV"
+	}
+	return fmt.Sprintf("%s:%d", tn, tag.CN())
+}
+
 // BufferTag returns the appropriate tag for a buffer.
 func BufferTag(value []byte) Tag {
 	return bufferLenTag(len(value))