lf.cpp revision 114402 
1// -*- C++ -*-
2/* Copyright (C) 1989, 1990, 1991, 1992 Free Software Foundation, Inc.
3     Written by James Clark (jjc@jclark.com)
4
5This file is part of groff.
6
7groff is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 2, or (at your option) any later
10version.
11
12groff is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License along
18with groff; see the file COPYING.  If not, write to the Free Software
19Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20
21#include <string.h>
22#include <ctype.h>
23#include "cset.h"
24#include "stringclass.h"
25
26extern void change_filename(const char *);
27extern void change_lineno(int);
28
29int interpret_lf_args(const char *p)
30{
31  while (*p == ' ')
32    p++;
33  if (!csdigit(*p))
34    return 0;
35  int ln = 0;
36  do {
37    ln *= 10;
38    ln += *p++ - '0';
39  } while (csdigit(*p));
40  if (*p != ' ' && *p != '\n' && *p != '\0')
41    return 0;
42  while (*p == ' ')
43    p++;
44  if (*p == '\0' || *p == '\n')  {
45    change_lineno(ln);
46    return 1;
47  }
48  const char *q;
49  for (q = p;
50       *q != '\0' && *q != ' ' && *q != '\n' && *q != '\\';
51       q++)
52    ;
53  string tem(p, q - p);
54  while (*q == ' ')
55    q++;
56  if (*q != '\n' && *q != '\0')
57    return 0;
58  tem += '\0';
59  change_filename(tem.contents());
60  change_lineno(ln);
61  return 1;
62}
63