fix build

Author: nihui

highgui/src/exif.cpp

@@ -79,16 +79,12 @@ ExifReader::~ExifReader()
  */
 bool ExifReader::parse()
 {
-    try {
-        m_exif = getExif();
-        if( !m_exif.empty() )
-        {
-            return true;
-        }
-        return false;
-    } catch (ExifParsingError&) {
-        return false;
+    m_exif = getExif();
+    if( !m_exif.empty() )
+    {
+        return true;
     }
+    return false;
 }
 
 
@@ -150,11 +146,11 @@ std::map<int, ExifEntry_t > ExifReader::getExif()
             case COM:
                 bytesToSkip = getFieldSize();
                 if (bytesToSkip < markerSize) {
-                    throw ExifParsingError();
+                    return std::map<int, ExifEntry_t >();
                 }
                 m_stream.seekg( static_cast<long>( bytesToSkip - markerSize ), m_stream.cur );
                 if ( m_stream.fail() ) {
-                    throw ExifParsingError();
+                    return std::map<int, ExifEntry_t >();
                 }
                 break;
 
@@ -165,12 +161,12 @@ std::map<int, ExifEntry_t > ExifReader::getExif()
             case APP1: //actual Exif Marker
                 exifSize = getFieldSize();
                 if (exifSize <= offsetToTiffHeader) {
-                    throw ExifParsingError();
+                    return std::map<int, ExifEntry_t >();
                 }
                 m_data.resize( exifSize - offsetToTiffHeader );
                 m_stream.seekg( static_cast<long>( offsetToTiffHeader ), m_stream.cur );
                 if ( m_stream.fail() ) {
-                    throw ExifParsingError();
+                    return std::map<int, ExifEntry_t >();
                 }
                 m_stream.read( reinterpret_cast<char*>(&m_data[0]), exifSize - offsetToTiffHeader );
                 exifFound = true;
@@ -414,7 +410,7 @@ std::string ExifReader::getString(const size_t offset) const
         dataOffset = getU32( offset + 8 );
     }
     if (dataOffset > m_data.size() || dataOffset + size > m_data.size()) {
-        throw ExifParsingError();
+        return std::string();
     }
     std::vector<uint8_t>::const_iterator it = m_data.begin() + dataOffset;
     std::string result( it, it + size ); //copy vector content into result
@@ -431,7 +427,7 @@ std::string ExifReader::getString(const size_t offset) const
 uint16_t ExifReader::getU16(const size_t offset) const
 {
     if (offset + 1 >= m_data.size())
-        throw ExifParsingError();
+        return 0;
 
     if( m_format == INTEL )
     {
@@ -449,7 +445,7 @@ uint16_t ExifReader::getU16(const size_t offset) const
 uint32_t ExifReader::getU32(const size_t offset) const
 {
     if (offset + 3 >= m_data.size())
-        throw ExifParsingError();
+        return 0;
 
     if( m_format == INTEL )
     {