Wrote a small test program that can reproduce the problem in bug #2206.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25446 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/tests/add-ons/translators/Jamfile

@@ -26,3 +26,5 @@ UnitTestLib libtranslatorstest.so
 		TIFFTranslatorTest.cpp
 	: $(libtranslation) be $(TARGET_LIBSTDC++)
 ;
+
+SubInclude HAIKU_TOP src tests add-ons translators exif ;

src/tests/add-ons/translators/exif/Jamfile

@@ -0,0 +1,19 @@
+SubDir HAIKU_TOP src tests add-ons translators exif ;
+
+SetSubDirSupportedPlatformsBeOSCompatible ;
+
+SubDirSysHdrs [ FDirName $(HAIKU_TOP) src add-ons translators jpeg ] ;
+SubDirSysHdrs [ FDirName $(HAIKU_TOP) src add-ons translators raw ] ;
+	# for TIFF.h and ReadHelper.h
+
+SimpleTest dump_exif :
+	dump_exif.cpp
+	exif_parser.cpp
+
+	: be
+;
+
+SEARCH on [ FGristFiles 
+		exif_parser.cpp
+	] = [ FDirName $(HAIKU_TOP) src add-ons translators jpeg ] ;
+

src/tests/add-ons/translators/exif/dump_exif.cpp

@@ -0,0 +1,125 @@
+/*
+ * Copyright 2008, Axel Dörfler, [email protected]. All rights reserved.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "exif_parser.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#include <BufferIO.h>
+#include <Entry.h>
+#include <File.h>
+#include <Message.h>
+
+#include "ReadHelper.h"
+#include "TIFF.h"
+
+
+static status_t
+process_exif(uint8* data, uint32 length)
+{
+	if (memcmp(data + 2, "Exif", 4))
+		return B_BAD_TYPE;
+
+	BMemoryIO source(data + 8, length - 8);
+	BMessage exif;
+	status_t status = convert_exif_to_message(source, exif);
+	if (status == B_OK)
+		exif.PrintToStream();
+
+	return status;
+}
+
+
+static status_t
+process_jpeg(BPositionIO& stream)
+{
+	enum {
+		START_OF_IMAGE_MARKER = 0xd8,
+		EXIF_MARKER = 0xe1
+	};
+
+	uint8 header[2];
+	if (stream.Read(&header, 2) != 2)
+		return B_IO_ERROR;
+	if (header[0] != 0xff || header[1] != START_OF_IMAGE_MARKER)
+		return B_BAD_TYPE;
+
+	while (true) {
+		// read marker
+		uint8 marker;
+		for (int32 i = 0; i < 7; i++) {
+			if (stream.Read(&marker, 1) != 1)
+				return B_BAD_TYPE;
+
+			if (marker != 0xff)
+				break;
+		}
+
+		if (marker == 0xff)
+			return B_BAD_TYPE;
+
+		// get length of section
+		
+		uint16 length;
+		if (stream.Read(&length, 2) != 2)
+			return B_BAD_TYPE;
+
+		swap_data(B_UINT16_TYPE, &length, 2, B_SWAP_BENDIAN_TO_HOST);
+
+		if (marker == EXIF_MARKER) {
+			// read in section
+			stream.Seek(-2, SEEK_CUR);
+
+			uint8 exifData[length];
+			if (stream.Read(exifData, length) == length
+				&& process_exif(exifData, length) == B_OK)
+				return B_OK;
+		} else {
+			// ignore section
+			stream.Seek(length - 2, SEEK_CUR);
+		}
+	}
+
+	return B_BAD_VALUE;
+}
+
+
+static status_t
+process_file(entry_ref& ref)
+{
+	BFile file(&ref, B_READ_WRITE);
+	status_t status = file.InitCheck();
+	if (status != B_OK)
+		return status;
+
+	// read EXIF
+
+	BBufferIO stream(&file, 65536, false);
+	status = process_jpeg(file);
+	if (status < B_OK) {
+		fprintf(stderr, "%s: processing JPEG file failed: %s\n", ref.name,
+			strerror(status));
+		return status;
+	}
+
+	return B_OK;
+}
+
+
+int
+main(int argc, char **argv)
+{
+	for (int i = 1; i < argc; i++) {
+		BEntry entry(argv[i]);
+		entry_ref ref;
+		if (entry.InitCheck() != B_OK || entry.GetRef(&ref) != B_OK)
+			continue;
+
+		process_file(ref);
+	}
+	return -1; 
+}