On 26Sep2007 13:58, aragonx@xxxxxxxxxx <aragonx@xxxxxxxxxx> wrote: | Okay, so I use fopen and it gives me a stream. Now when I call fread (say | for 100K) on my large file (2G) it will try to read the first 64K | regardless of size and populate *ptr. Yes. It will read a chunk of the data into the buffer. For a regular file it will usually be the whole 64kb. For some other things it may be less (eg a terminal). | If size is larger than 64K (100K | here) it will then read another 64K? After you, the programmer, have consumed the data currently in the buffer, yes. If you call fread (or scanf etc) with data in the buffer, that data will be used to satisfy your reuqest. If more is needed, more is read from the file into the (now empty) buffer). | Does it use the same buffer space | (effectively only using 64K) Yes. | and is that buffer space outside the memory | footprint of my application? No. fopen uses stdin, and that is a library inside your app. -- Cameron Simpson <cs@xxxxxxxxxx> DoD#743 http://www.cskk.ezoshosting.com/cs/ Early to bed and early to rise makes a man healthy and wealthy with bags under his eyes. - Dave Cochran, <cochran@xxxxxxxxxxxxx>
