46 lines
1.7 KiB
C
46 lines
1.7 KiB
C
/*
|
|
* Copyright (c) 2011, 2012, 2013, 2014 Jonas 'Sortie' Termansen.
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* stdio/fresetfile.c
|
|
* After a FILE has been shut down, returns all fields to their default state.
|
|
*/
|
|
|
|
#include <pthread.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
// Note: This function preserves a few parts of the fields - this means that if
|
|
// you are using this to reset a fresh FILE object, you should memset it
|
|
// to zeroes first to avoid problems.
|
|
void fresetfile(FILE* fp)
|
|
{
|
|
FILE* prev = fp->prev;
|
|
FILE* next = fp->next;
|
|
unsigned char* keep_buffer = fp->buffer;
|
|
void* free_user = fp->free_user;
|
|
void (*free_func)(void*, FILE*) = fp->free_func;
|
|
int kept_flags = fp->flags & (_FILE_REGISTERED | 0);
|
|
memset(fp, 0, sizeof(*fp));
|
|
fp->buffer = keep_buffer;
|
|
fp->file_lock = (pthread_mutex_t) PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP;
|
|
fp->flags = kept_flags;
|
|
fp->buffer_mode = -1;
|
|
fp->free_user = free_user;
|
|
fp->free_func = free_func;
|
|
fp->prev = prev;
|
|
fp->next = next;
|
|
}
|