c++ - How to seek stream pointer of a memory mapped file(using boost)? -

c++ - How to seek stream pointer of a memory mapped file(using boost)? -

i mapped file memory using boost::iostreams::mapped_file_source , declared stream read file boost::iostreams::stream <boost::iostreams::mapped_file_source> streamreader.

it worked fine , able parse memory mapped file. used getline read entire file , stored offsets file. while performing operation able utilize seekg seek streamreader desired position. 1 time whole file read, cannot seek streamreader anywhere.

streamreader.fail() returns true. streamreader clears pointer 1 time reaches end of file?

is there way can go desired file offset after reading entire file?

thankyou

i think should phone call clear() method of stream reset state.

see http://www.cplusplus.com/reference/ios/ios/clear/

c++ visual-studio-2010 boost seek