111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/* ugtlin.c
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Read a line with backslash continuations.
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Copyright (C) 1992 Ian Lance Taylor
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This file is part of the Taylor UUCP uuconf library.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License
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as published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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The author of the program may be contacted at ian@airs.com or
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c/o Cygnus Support, Building 200, 1 Kendall Square, Cambridge, MA 02139.
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*/
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#include "uucnfi.h"
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#if USE_RCS_ID
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const char _uuconf_ugtlin_rcsid[] = "$Id: ugtlin.c,v 1.4 1994/01/30 21:14:29 ian Rel $";
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#endif
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/* Read a line from a file with backslash continuations. This updates
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the qglobal->ilineno count for each additional line it reads. */
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int
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_uuconf_getline (qglobal, pzline, pcline, e)
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struct sglobal *qglobal;
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char **pzline;
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size_t *pcline;
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FILE *e;
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{
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int ctot;
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char *zline;
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size_t cline;
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ctot = -1;
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zline = NULL;
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cline = 0;
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while (TRUE)
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{
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int cchars;
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if (ctot < 0)
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cchars = getline (pzline, pcline, e);
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else
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cchars = getline (&zline, &cline, e);
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if (cchars < 0)
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{
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if (zline != NULL)
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free ((pointer) zline);
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if (ctot >= 0)
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return ctot;
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else
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return cchars;
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}
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if (ctot < 0)
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ctot = cchars;
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else
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{
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if (*pcline <= ctot + cchars)
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{
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char *znew;
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if (*pcline > 0)
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znew = (char *) realloc ((pointer) *pzline,
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(size_t) (ctot + cchars + 1));
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else
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znew = (char *) malloc ((size_t) (ctot + cchars + 1));
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if (znew == NULL)
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{
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free ((pointer) zline);
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return -1;
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}
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*pzline = znew;
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*pcline = ctot + cchars + 1;
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}
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memcpy ((pointer) ((*pzline) + ctot), (pointer) zline,
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(size_t) (cchars + 1));
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ctot += cchars;
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}
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if (ctot < 2
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|| (*pzline)[ctot - 1] != '\n'
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|| (*pzline)[ctot - 2] != '\\')
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{
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if (zline != NULL)
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free ((pointer) zline);
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return ctot;
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}
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++qglobal->ilineno;
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ctot -= 2;
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(*pzline)[ctot] = '\0';
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}
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}
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