what is difference between fgetpos/fsetpos and ftell/fseek
2018年5月10日 · Well, from the manpage we can see that ftell and fseek use type long int to represent offsets (positions) in a file, and may therefore be limited to offsets which can be …
c - How the ftell() function works? - Stack Overflow
2023年4月6日 · ftell returns the current value of the file position indicator, and fgetc does advance the file position indicator within the loop. But this program is wrong. For a stream opened in …
Trying to understand the return value of ftell function
2014年1月14日 · The ftell() function obtains the current value of the file position indicator for the stream pointed to by ...
How can I get a file's size in C? - Stack Overflow
fseek(f, 0, SEEK_END); // seek to end of file size = ftell(f); // get current file pointer fseek(f, 0, SEEK_SET); // seek back to beginning of file // proceed with allocating memory and reading …
c - Use ftell to find the file size - Stack Overflow
2018年3月6日 · And for a text stream, 7.21.9.4 The ftell function, paragraph 2 states: The ftell function obtains the current value of the file position indicator for the stream pointed to by …
ftell at a position past 2GB - Stack Overflow
2013年5月22日 · on ftell/fseek. ftell() and fseek() are limited to 32 bits (including sign bit) on the vast majority of 32-bit architecture systems. So when there is large file support you run into …
Why does ftell () shows wrong position after fread ()?
2012年5月18日 · From the documentation of ftell: or binary streams, the value returned corresponds to the number of bytes from the beginning of the file. For text streams, the value …
C-programming ftell fseek fread, read size of a file
2014年6月27日 · I have a file. I read the size of file. Then I loop reading two bytes at a time until I get to the end of the file. After every read operation I increment the current position by 2, …
c - Why the ftell returns 0 in this function? - Stack Overflow
2014年6月3日 · ftell does not return the total size of the file; it returns the current read or write position within the file. You call ftell immediately after opening the file, so that position is the …
popen - ftell function giving -1 in C for stdout - Stack Overflow
2011年10月9日 · If you inspect errno immediately after the call to ftell you will discover that it has the value ESPIPE, which means "You can't do that to a pipe." If you're trying to read all of the …