Added ability to parse directly from an input stream (eg. file). This allows very big messages to be parsed without loading the whole message data into memory.

2 files changed, 38 insertions, 0 deletions

diff --git a/src/platforms/posix/posixFile.cpp b/src/platforms/posix/posixFile.cpp
index ec529eb6..4087a21f 100644
--- a/src/platforms/posix/posixFile.cpp
+++ b/src/platforms/posix/posixFile.cpp
@@ -224,6 +224,26 @@ vmime::utility::stream::size_type posixFileReaderInputStream::skip(const size_ty
 }
 
 
+vmime::utility::stream::size_type posixFileReaderInputStream::getPosition() const
+{
+	const off_t curPos = ::lseek(m_fd, 0, SEEK_CUR);
+
+	if (curPos == off_t(-1))
+		posixFileSystemFactory::reportError(m_path, errno);
+
+	return static_cast <size_type>(curPos);
+}
+
+
+void posixFileReaderInputStream::seek(const size_type pos)
+{
+	const off_t newPos = ::lseek(m_fd, pos, SEEK_SET);
+
+	if (newPos == off_t(-1))
+		posixFileSystemFactory::reportError(m_path, errno);
+}
+
+
 
 //
 // posixFileWriter
diff --git a/src/platforms/windows/windowsFile.cpp b/src/platforms/windows/windowsFile.cpp
index 624612af..5da786e5 100644
--- a/src/platforms/windows/windowsFile.cpp
+++ b/src/platforms/windows/windowsFile.cpp
@@ -479,6 +479,24 @@ vmime::utility::stream::size_type windowsFileReaderInputStream::skip(const size_
 	return (dwNewPos - dwCurPos);
 }
 
+vmime::utility::stream::size_type windowsFileReaderInputStream::getPosition() const
+{
+	DWORD dwCurPos = SetFilePointer(m_hFile, 0, NULL, FILE_CURRENT);
+
+	if (dwCurPos == INVALID_SET_FILE_POINTER)
+		windowsFileSystemFactory::reportError(m_path, GetLastError());
+
+	return static_cast <size_type>(dwCurPos);
+}
+
+void windowsFileReaderInputStream::seek(const size_type pos)
+{
+	DWORD dwNewPos = SetFilePointer(m_hFile, (LONG)pos, NULL, FILE_BEGIN);
+
+	if (dwNewPos == INVALID_SET_FILE_POINTER)
+		windowsFileSystemFactory::reportError(m_path, GetLastError());
+}
+
 windowsFileWriter::windowsFileWriter(const vmime::utility::file::path& path, const vmime::string& nativePath)
 : m_path(path), m_nativePath(nativePath)
 {