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/*
This file is part of SLRN.
Copyright (c) 2007-2009 John E. Davis <jed@jedsoft.org>
This program 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 of the License, or (at your option)
any later version.
This program 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 this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "slrnfeat.h"
#include <stdio.h>
#include <string.h>
#include <errno.h>
#ifdef HAVE_STDLIB_H
# include <stdlib.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <slang.h>
#include "group.h"
#include "art.h"
#include "strutil.h"
#include "hdrutils.h"
Slrn_Article_Line_Type *slrn_find_header_line (Slrn_Article_Type *a, char *header)
{
Slrn_Article_Line_Type *line;
unsigned char ch = (unsigned char) UPPER_CASE(*header);
unsigned int len = strlen (header);
if (a == NULL)
return NULL;
line = a->lines;
while ((line != NULL) && (line->flags & HEADER_LINE))
{
unsigned char ch1 = (unsigned char) *line->buf;
if ((ch == UPPER_CASE(ch1))
&& (0 == slrn_case_strncmp (header, line->buf, len)))
return line;
line = line->next;
}
return NULL;
}
/* Here it is assumed that buf is already allocated. This routine steals
* it, unless an error occurs, in which case it will return NULL.
* If buf is NULL, then the header separator line will be added if it is not
* already present.
*/
Slrn_Article_Line_Type *slrn_append_to_header (Slrn_Article_Type *a, char *buf, int free_on_error)
{
Slrn_Article_Line_Type *hline, *bline;
Slrn_Article_Line_Type *line;
unsigned int flags = HEADER_LINE;
hline = a->lines;
bline = NULL;
if (hline != NULL)
{
while ((hline != NULL)
&& (hline->flags & HEADER_LINE)
&& (NULL != (bline = hline->next))
&& (bline->flags & HEADER_LINE))
hline = bline;
}
if (buf == NULL)
{
/* header separator */
if ((bline != NULL) && (bline->buf[0] == 0))
return a->cline = bline;
if (NULL == (buf = slrn_strmalloc ("", 1)))
return NULL;
flags = 0;
}
line = (Slrn_Article_Line_Type *) slrn_malloc(sizeof(Slrn_Article_Line_Type),1,1);
if (line == NULL)
{
if (free_on_error)
slrn_free (buf);
return NULL;
}
line->flags = flags;
line->buf = buf;
if (hline == NULL)
a->lines = line;
else
hline->next = line;
line->prev = hline;
line->next = bline;
if (bline != NULL)
bline->prev = line;
return a->cline = line;
}
Slrn_Article_Line_Type *slrn_append_header_keyval (Slrn_Article_Type *a, char *key, char *value)
{
unsigned int buflen;
char *buf;
buflen = strlen (key) + strlen(value) + 3;
if (NULL == (buf = slrn_malloc (buflen, 0, 1)))
return NULL;
(void) SLsnprintf (buf, buflen, "%s: %s", key, value);
return slrn_append_to_header (a, buf, 1);
}
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