From d930d36155fe79b277c11d868572769cb4ffb586 Mon Sep 17 00:00:00 2001
From: Glenn Randers-Pehrson <glennrp at users.sourceforge.net>
Date: Thu, 3 Aug 2017 10:29:10 -0500
Subject: [libpng16] Restored png_get_eXIf_1() and png_set_eXIf_1() because
 strlen(eXIf_buf)

does not work (the eXIf chunk data can contain zeroes).
---
 pngget.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

(limited to 'pngget.c')

diff --git a/pngget.c b/pngget.c
index 9068952f8..5046db58a 100644
--- a/pngget.c
+++ b/pngget.c
@@ -777,12 +777,23 @@ png_get_sPLT(png_const_structrp png_ptr, png_inforp info_ptr,
 png_uint_32 PNGAPI
 png_get_eXIf(png_const_structrp png_ptr, png_inforp info_ptr,
     png_bytep *exif)
+{
+  png_warning(png_ptr, "png_get_eXIf does not work; use png_get_eXIf_1");
+  PNG_UNUSED(info_ptr)
+  PNG_UNUSED(exif)
+  return 0;
+}
+
+png_uint_32 PNGAPI
+png_get_eXIf_1(png_const_structrp png_ptr, png_inforp info_ptr,
+    png_uint_32 *num_exif, png_bytep *exif)
 {
    png_debug1(1, "in %s retrieval function", "eXIf");
 
    if (png_ptr != NULL && info_ptr != NULL &&
        (info_ptr->valid & PNG_INFO_eXIf) != 0 && exif != NULL)
    {
+      *num_exif = info_ptr->num_exif;
       *exif = info_ptr->exif;
       return (PNG_INFO_eXIf);
    }
-- 
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