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/* ugtlin.c
Read a line with backslash continuations.
Copyright (C) 1992 Ian Lance Taylor
This file is part of the Taylor UUCP uuconf library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License
as published by the Free Software Foundation; either version 2 of
the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
The author of the program may be contacted at ian@airs.com or
c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
*/
#include "uucnfi.h"
#if USE_RCS_ID
const char _uuconf_ugtlin_rcsid[] = "$Id: ugtlin.c,v 1.6 1995/06/21 19:25:06 ian Rel $";
#endif
/* Read a line from a file with backslash continuations. This updates
the qglobal->ilineno count for each additional line it reads. */
int
_uuconf_getline (qglobal, pzline, pcline, e)
struct sglobal *qglobal;
char **pzline;
size_t *pcline;
FILE *e;
{
int ctot;
char *zline;
size_t cline;
ctot = -1;
zline = NULL;
cline = 0;
while (TRUE)
{
int cchars;
if (ctot < 0)
cchars = getline (pzline, pcline, e);
else
cchars = getline (&zline, &cline, e);
if (cchars < 0)
{
if (zline != NULL)
free ((pointer) zline);
if (ctot >= 0)
return ctot;
else
return cchars;
}
if (ctot < 0)
ctot = cchars;
else
{
if (*pcline <= ctot + cchars)
{
char *znew;
if (*pcline > 0)
znew = (char *) realloc ((pointer) *pzline,
(size_t) (ctot + cchars + 1));
else
znew = (char *) malloc ((size_t) (ctot + cchars + 1));
if (znew == NULL)
{
free ((pointer) zline);
return -1;
}
*pzline = znew;
*pcline = ctot + cchars + 1;
}
memcpy ((pointer) ((*pzline) + ctot), (pointer) zline,
(size_t) (cchars + 1));
ctot += cchars;
}
if (ctot < 2
|| (*pzline)[ctot - 1] != '\n'
|| (*pzline)[ctot - 2] != '\\')
{
if (zline != NULL)
free ((pointer) zline);
return ctot;
}
++qglobal->ilineno;
ctot -= 2;
(*pzline)[ctot] = '\0';
}
}
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