From 47eeaa4255cc977a51abfdaaf3d9bb1b8e8e701c Mon Sep 17 00:00:00 2001
From: Romein van Buren <romein@vburen.nl>
Date: Thu, 12 Jun 2025 09:41:46 +0200
Subject: [PATCH] Add debug utils

---
 fmp/fmp_chunk.go |  5 -----
 fmp/fmp_debug.go | 26 ++++++++++++++++++++++++++
 fmp/fmp_test.go  |  2 ++
 3 files changed, 28 insertions(+), 5 deletions(-)
 create mode 100644 fmp/fmp_debug.go

diff --git a/fmp/fmp_chunk.go b/fmp/fmp_chunk.go
index 3d53956..fb13298 100644
--- a/fmp/fmp_chunk.go
+++ b/fmp/fmp_chunk.go
@@ -2,7 +2,6 @@ package fmp
 
 import (
 	"encoding/binary"
-	"fmt"
 )
 
 type FmpChunk struct {
@@ -13,10 +12,6 @@ type FmpChunk struct {
 	Value  []byte
 }
 
-func (c *FmpChunk) String() string {
-	return fmt.Sprintf("<%v(%v)>", c.Type, c.Length)
-}
-
 func (ctx *FmpFile) readChunk(payload []byte) (*FmpChunk, error) {
 
 	// Simple data
diff --git a/fmp/fmp_debug.go b/fmp/fmp_debug.go
new file mode 100644
index 0000000..ed4f3cd
--- /dev/null
+++ b/fmp/fmp_debug.go
@@ -0,0 +1,26 @@
+package fmp
+
+import (
+	"fmt"
+	"os"
+)
+
+func (f *FmpFile) ToDebugFile(fname string) {
+	fo, err := os.Create(fname)
+	if err != nil {
+		panic(err)
+	}
+	defer func() {
+		if err := fo.Close(); err != nil {
+			panic(err)
+		}
+	}()
+
+	for _, chunk := range f.Chunks {
+		fmt.Fprintf(fo, "%s, %s\n", chunk.String(), string(chunk.Value))
+	}
+}
+
+func (c *FmpChunk) String() string {
+	return fmt.Sprintf("<%v(%v)>", c.Type, c.Length)
+}
diff --git a/fmp/fmp_test.go b/fmp/fmp_test.go
index b48b73f..191457a 100644
--- a/fmp/fmp_test.go
+++ b/fmp/fmp_test.go
@@ -19,4 +19,6 @@ func TestOpenFile(t *testing.T) {
 	if f.VersionDate.Format("2006-01-02") != "2025-01-11" {
 		t.Errorf("expected version date to be '2025-01-11', got '%s'", f.VersionDate.Format("2006-01-02"))
 	}
+
+	f.ToDebugFile("../private/output.txt")
 }