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Hi! Let's say that we have a program, written in C, which reads a file (in my case is a bitmap file). It's storing the file in some address space, right? Is there any way to find out in which addresses is the file stored? or can I give the starting address where the file is going to be stored?
ps: sorry for my english
You have to allocate the buffer big enough to hold all the file (if you want to read the whole file at once)Quote:
Originally Posted by paok
you can allocate memory with malloc, which will return a starting address of the buffer
Then you will give this address to fread to read the contents of the file into the buffer
Files are stored on the hard-disk. Portions of the file is then copied into memory when you read the file. But the file as such hasn't got an address.
There are functions in most OS's that allow you to MAKE the file appear like it's part of memory, such as MapViewOfFile() in Windows and mmap() in Linux. But that's essentially just hiding the fact that the file is a set of sectors on the hard-disk, and "moving" the task of actually reading the file into the memory management process, but it's still having to be read and written into memory.
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Mats
When you load data into memory, you have to give an address (i.e. a pointer). Naturally, this address is where the data will be located...Quote:
Originally Posted by paok