Merge pull request #1929 from postscript-dev/fix_exiv2_-pR

Fix `exiv2 -pR` for Sony images (#1805)

Author: postscript-dev

src/image.cpp

@@ -477,7 +477,11 @@ namespace Exiv2 {
                         io.seekOrThrow(offset, BasicIo::beg, kerCorruptedMetadata);  // position
                         io.readOrThrow(bytes, jump, kerCorruptedMetadata)     ;  // read
                         bytes[jump]=0               ;
-                        if ( ::strcmp("Nikon",chars) == 0 ) {
+
+                        bool bNikon = ::strcmp("Nikon"    ,chars) == 0;
+                        bool bSony  = ::strcmp("SONY DSC ",chars) == 0;
+
+                        if ( bNikon ) {
                             // tag is an embedded tiff
                             const long byteslen = count-jump;
                             DataBuf bytes(byteslen);  // allocate a buffer
@@ -486,8 +490,9 @@ namespace Exiv2 {
                             printTiffStructure(memIo,out,option,depth);
                         } else {
                             // tag is an IFD
+                            uint32_t punt = bSony ? 12 : 0 ;
                             io.seekOrThrow(0, BasicIo::beg, kerCorruptedMetadata);  // position
-                            printIFDStructure(io,out,option,offset,bSwap,c,depth);
+                            printIFDStructure(io,out,option,offset+punt,bSwap,c,depth);
                         }
 
                         io.seekOrThrow(restore, BasicIo::beg, kerCorruptedMetadata); // restore

tests/bugfixes/github/test_issue_1805.py

@@ -0,0 +1,22 @@
+# -*- coding: utf-8 -*-
+
+import unittest
+import system_tests
+from system_tests import CaseMeta, path, check_no_ASAN_UBSAN_errors
+
+# Check that `exiv2 -pr` works for different file types.
+# ExifTool has a list of markers that appear in the headers:
+# https://exiftool.org/makernote_types.html
+
+@unittest.skip("Skipping test using option -pR (only for Debug mode)")
+class exiv2pRHeaderTest(metaclass=CaseMeta):
+
+    url = "https://github.com/Exiv2/exiv2/issues/1805"
+
+    filename = system_tests.path("$data_path/exiv2-SonyDSC-HX60V.exv") # Uses marker: "SONY DSC "
+    commands = ["$exiv2 -pR " + filename]
+
+    stderr = [""]
+    retval = [0]
+
+    compare_stdout = check_no_ASAN_UBSAN_errors