ifstream, bytes read?
How do you get how many bytes were read with the ifstream::read function?
Tell is saying the file is 10 bytes and windows says it is 10 bytes too but there are only 8 bytes in the file so when I read it, it 开发者_StackOverflowis only reading the 8 bytes so I end up with too large of a buffer.
You can find out by calling gcount()
on a stream immediately after you read.
ifs.read(buf, sizeof buf);
std::streamsize bytes = ifs.gcount();
There is a function called readsome(...)
that does what you want:
streamsize readsome ( char* s, streamsize n );
Return Value The number of characters extracted.
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