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deb-mbse/mbfido/fsort.c

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/*****************************************************************************
*
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* $Id$
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* Purpose ...............: File sort
*
*****************************************************************************
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* Copyright (C) 1997-2002
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*
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* Michiel Broek FIDO: 2:280/2802
* Beekmansbos 10
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* 1971 BV IJmuiden
* the Netherlands
*
* This file is part of MBSE BBS.
*
* This BBS is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* MBSE BBS is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with MBSE BBS; see the file COPYING. If not, write to the Free
* Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*****************************************************************************/
#include "../lib/libs.h"
#include "../lib/clcomm.h"
#include "fsort.h"
/*
* Tidy the filearray
*/
void tidy_fdlist(fd_list **fdp)
{
fd_list *tmp, *old;
for (tmp = *fdp; tmp; tmp = old) {
old = tmp->next;
free(tmp);
}
*fdp = NULL;
}
/*
* Add a file on the array.
*/
void fill_fdlist(fd_list **fdp, char *filename, time_t filedate)
{
fd_list *tmp;
tmp = (fd_list *)malloc(sizeof(fd_list));
tmp->next = *fdp;
sprintf(tmp->fname, "%s", filename);
tmp->fdate = filedate;
*fdp = tmp;
}
int compfdate(fd_list **, fd_list **);
/*
* Sort the array of files by filedate
*/
void sort_fdlist(fd_list **fdp)
{
fd_list *ta, **vector;
size_t n = 0, i;
if (*fdp == NULL) {
return;
}
for (ta = *fdp; ta; ta = ta->next)
n++;
vector = (fd_list **)malloc(n * sizeof(fd_list *));
i = 0;
for (ta = *fdp; ta; ta = ta->next) {
vector[i++] = ta;
}
qsort(vector, n, sizeof(fd_list*), (int(*)(const void*, const void*))compfdate);
(*fdp) = vector[0];
i = 1;
for (ta = *fdp; ta; ta = ta->next) {
if (i < n)
ta->next = vector[i++];
else
ta->next = NULL;
}
free(vector);
return;
}
int compfdate(fd_list **fdp1, fd_list **fdp2)
{
return ((*fdp1)->fdate - (*fdp2)->fdate);
}
/*
* Return the name of the oldest file in the array
*/
char *pull_fdlist(fd_list **fdp)
{
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static char buf[PATH_MAX];
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fd_list *ta;
if (*fdp == NULL)
return NULL;
ta = *fdp;
memset(&buf, 0, sizeof(buf));
sprintf(buf, "%s", ta->fname);
if (ta->next != NULL)
*fdp = ta->next;
else
*fdp = NULL;
free(ta);
return buf;
}