refer/lookbib.c

   1 // -*- C++ -*-
   2 /* Copyright (C) 1991 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.uucp)
   4
   5 This file is part of groff.
   6
   7 groff is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 1, or (at your option) any later
  10 version.
  11
  12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License along
  18 with groff; see the file LICENSE.  If not, write to the Free Software
  19 Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <assert.h>
  25 #include <errno.h>
  26
  27 #include "errarg.h"
  28 #include "error.h"
  29 #include "lib.h"
  30 #include "cset.h"
  31
  32 #include "refid.h"
  33 #include "search.h"
  34
  35 extern "C" {
  36   int isatty(int);
  37 }
  38
  39 static void usage()
  40 {
  41   fprintf(stderr, "usage: %s [-v] [-i XYZ] [-t N] database ...\n",
  42           program_name);
  43   exit(1);
  44 }
  45
  46 main(int argc, char **argv)
  47 {
  48   program_name = argv[0];
  49   static char stderr_buf[BUFSIZ];
  50   setbuf(stderr, stderr_buf);
  51   int opt;
  52   while ((opt = getopt(argc, argv, "vVi:t:")) != EOF)
  53     switch (opt) {
  54     case 'V':
  55       verify_flag = 1;
  56       break;
  57     case 'i':
  58       linear_ignore_fields = optarg;
  59       break;
  60     case 't':
  61       {
  62         char *ptr;
  63         long n = strtol(optarg, &ptr, 10);
  64         if (n == 0 && ptr == optarg) {
  65           error("bad integer `%1' in `t' option", optarg);
  66           break;
  67         }
  68         if (n < 1)
  69           n = 1;
  70         linear_truncate_len = int(n);
  71         break;
  72       }
  73     case 'v':
  74       {
  75         extern const char *version_string;
  76         fprintf(stderr, "GNU lookbib version %s\n", version_string);
  77         fflush(stderr);
  78         break;
  79       }
  80     case '?':
  81       usage();
  82     default:
  83       assert(0);
  84     }
  85   if (optind >= argc)
  86     usage();
  87   search_list list;
  88   for (int i = optind; i < argc; i++)
  89     list.add_file(argv[i]);
  90   if (list.nfiles() == 0)
  91     fatal("no databases");
  92   char line[1024];
  93   int interactive = isatty(fileno(stdin));
  94   for (;;) {
  95     if (interactive) {
  96       fputs("> ", stderr);
  97       fflush(stderr);
  98     }
  99     if (!fgets(line, sizeof(line), stdin))
 100       break;
 101     char *ptr = line;
 102     while (csspace(*ptr))
 103       ptr++;
 104     if (*ptr == '\0')
 105       continue;
 106     search_list_iterator iter(&list, line);
 107     char *start;
 108     int len;
 109     for (int count = 0; iter.next(&start, &len); count++) {
 110       if (fwrite(start, 1, len, stdout) != len)
 111         fatal("write error on stdout: %1", strerror(errno));
 112       // Can happen for last reference in file.
 113       if (start[len - 1] != '\n')
 114         putchar('\n');
 115       putchar('\n');
 116     }
 117     fflush(stdout);
 118     if (interactive) {
 119       fprintf(stderr, "%d found\n", count);
 120       fflush(stderr);
 121     }
 122   }
 123   if (interactive)
 124     putc('\n', stderr);
 125   return 0;
 126 }
 127