|
|
 |
|
|
Thread Tools | Display Modes |
Nov 19th, 2006, 9:10 PM
|
#1 |
|
Newbie
Join Date: Nov 2006
Posts: 1
Rep Power: 0
 |
the FILE * struct.
what is the definition for it so I can control where in the file I'm reading from/writing to?
|
|
|
|
Nov 19th, 2006, 9:46 PM
|
#2 |
|
Programmer
Join Date: Aug 2005
Posts: 98
Rep Power: 4
 |
fseek(FILE * stream, long offset, int origin);
stream is a pointer to a FILE. offset is the number of bytes to seek by. can be negative (so you can seek backwards from current location, for example). origin is SEEK_SET (beginning of file), SEEK_CUR (current file location), or SEEK_END (end of file). |
|
|
|
|
Nov 19th, 2006, 11:10 PM
|
#3 |
|
Resident Grouch
 
Join Date: Jun 2005
Posts: 6,453
Rep Power: 10
|
I believe this is it, Matty:
typedef struct
{
unsigned char *_ptr;
int _cnt;
unsigned char *_base;
unsigned char *_bufendp;
short _flag;
short _file;
int __stdioid;
char *__newbase;
long _unused[1];
} FILE;
__________________
Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers |
|
|
|
|
Nov 20th, 2006, 1:04 AM
|
#4 |
|
Professional Programmer
Join Date: May 2006
Location: Maryland, USA
Posts: 306
Rep Power: 3
|
The contents of the FILE structure are platform dependent. For example, in the GNU C library it looks completely different and has about 2-3 times the number of fields.
|
|
|
|
|
Nov 20th, 2006, 10:55 AM
|
#5 |
|
Professional Programmer
 
Join Date: Sep 2005
Posts: 419
Rep Power: 4
|
>what is the definition for it so I can control where in the file I'm reading from/writing to?
If you have to ask, you don't need to know. If it really bothers you that much, you can write your own stdio. But I'll warn you, it's not exactly a trivial project. You probably want fseek or fgetpos/fsetpos. But their usage can be tricky.
__________________
Even if the voices aren't real, they have some pretty good ideas. |
|
|
|
|
| Bookmarks |
| Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | |
| Thread Tools | |
| Display Modes | |
|
|
Similar Threads
|
||||
| Thread | Thread Starter | Forum | Replies | Last Post |
| OnlineTextEditor.Com! | Sane | Show Off Your Open Source Projects | 43 | Jun 16th, 2006 9:55 AM |
| add mutiple users to the smbpasswd file. | Pizentios | Bash / Shell Scripting | 3 | Oct 20th, 2005 1:48 PM |
| After execution - Error cannot locate /Skin File? | wchar | Visual Basic | 1 | Mar 5th, 2005 10:04 PM |
| airport Log program using 3D linked List : problem reading from file | gemini_shooter | C++ | 0 | Mar 2nd, 2005 5:12 PM |
| Structure char field to a disk file | ehab_aziz2001 | C++ | 0 | Feb 10th, 2005 3:42 PM |
Linear Mode
