src/utils/lookbib/lookbib.cc

   1 // -*- C++ -*-
   2 /* Copyright (C) 1989-1992, 2000, 2001 Free Software Foundation, Inc.
   3      Written by James Clark (jjc@jclark.com)
   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 2, 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 COPYING.  If not, write to the Free Software
  19 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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   const char *Version_string;
  38 }
  39
  40 static void usage(FILE *stream)
  41 {
  42   fprintf(stream, "usage: %s [-v] [-i XYZ] [-t N] database ...\n",
  43           program_name);
  44 }
  45
  46 int 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   static const struct option long_options[] = {
  53     { "help", no_argument, 0, CHAR_MAX + 1 },
  54     { "version", no_argument, 0, 'v' },
  55     { NULL, 0, 0, 0 }
  56   };
  57   while ((opt = getopt_long(argc, argv, "vVi:t:", long_options, NULL)) != EOF)
  58     switch (opt) {
  59     case 'V':
  60       verify_flag = 1;
  61       break;
  62     case 'i':
  63       linear_ignore_fields = optarg;
  64       break;
  65     case 't':
  66       {
  67         char *ptr;
  68         long n = strtol(optarg, &ptr, 10);
  69         if (n == 0 && ptr == optarg) {
  70           error("bad integer `%1' in `t' option", optarg);
  71           break;
  72         }
  73         if (n < 1)
  74           n = 1;
  75         linear_truncate_len = int(n);
  76         break;
  77       }
  78     case 'v':
  79       {
  80         printf("GNU lookbib (groff) version %s\n", Version_string);
  81         exit(0);
  82         break;
  83       }
  84     case CHAR_MAX + 1: // --help
  85       usage(stdout);
  86       exit(0);
  87       break;
  88     case '?':
  89       usage(stderr);
  90       exit(1);
  91       break;
  92     default:
  93       assert(0);
  94     }
  95   if (optind >= argc) {
  96     usage(stderr);
  97     exit(1);
  98   }
  99   search_list list;
 100   for (int i = optind; i < argc; i++)
 101     list.add_file(argv[i]);
 102   if (list.nfiles() == 0)
 103     fatal("no databases");
 104   char line[1024];
 105   int interactive = isatty(fileno(stdin));
 106   for (;;) {
 107     if (interactive) {
 108       fputs("> ", stderr);
 109       fflush(stderr);
 110     }
 111     if (!fgets(line, sizeof(line), stdin))
 112       break;
 113     char *ptr = line;
 114     while (csspace(*ptr))
 115       ptr++;
 116     if (*ptr == '\0')
 117       continue;
 118     search_list_iterator iter(&list, line);
 119     const char *start;
 120     int len;
 121     int count;
 122     for (count = 0; iter.next(&start, &len); count++) {
 123       if (fwrite(start, 1, len, stdout) != (size_t)len)
 124         fatal("write error on stdout: %1", strerror(errno));
 125       // Can happen for last reference in file.
 126       if (start[len - 1] != '\n')
 127         putchar('\n');
 128       putchar('\n');
 129     }
 130     fflush(stdout);
 131     if (interactive) {
 132       fprintf(stderr, "%d found\n", count);
 133       fflush(stderr);
 134     }
 135   }
 136   if (interactive)
 137     putc('\n', stderr);
 138   return 0;
 139 }
 140