From 59b029effe50fbd2b776f2e1739daed8de2738fd Mon Sep 17 00:00:00 2001
From: Thomas Bernard <miniupnp@free.fr>
Date: Wed, 1 Jan 2020 23:22:40 +0100
Subject: [PATCH] PackBits_pack_buffer()

---
 src/packbits.c | 13 +++++++++++++
 src/packbits.h |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/src/packbits.c b/src/packbits.c
index 7cb51498..87bf2fa4 100644
--- a/src/packbits.c
+++ b/src/packbits.c
@@ -180,3 +180,16 @@ int PackBits_pack_flush(T_PackBits_data * data)
   }
   return data->output_count;
 }
+
+int PackBits_pack_buffer(FILE * f, const byte * buffer, size_t size)
+{
+  T_PackBits_data pb_data;
+
+  PackBits_pack_init(&pb_data, f);
+  while (size-- > 0)
+  {
+    if (PackBits_pack_add(&pb_data, *buffer++))
+      return -1;
+  }
+  return PackBits_pack_flush(&pb_data);
+}
diff --git a/src/packbits.h b/src/packbits.h
index 060ba1fd..400e8277 100644
--- a/src/packbits.h
+++ b/src/packbits.h
@@ -70,4 +70,11 @@ int PackBits_pack_add(T_PackBits_data * data, byte b);
  */
 int PackBits_pack_flush(T_PackBits_data * data);
 
+/**
+ * Pack a full buffer to FILE
+ * @param f FILE output or NULL (for no output)
+ * @return -1 for error, or the size of the packed stream so far
+ */
+int PackBits_pack_buffer(FILE * f, const byte * buffer, size_t size);
+
 #endif