gcc/java/jv-scan.c

   1 /* Main for jv-scan
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004
   3    Free Software Foundation, Inc.
   4    Contributed by Alexandre Petit-Bianco (apbianco@cygnus.com)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 59 Temple Place - Suite 330,
  21 Boston, MA 02111-1307, USA.  */
  22
  23 #include "config.h"
  24 #include "system.h"
  25 #include "coretypes.h"
  26 #include "tm.h"
  27 #include "intl.h"
  28
  29 #include "obstack.h"            /* We use obstacks in lex.c */
  30
  31 #include "version.h"
  32
  33 #ifdef HAVE_LOCALE_H
  34 #include <locale.h>
  35 #endif
  36
  37 #ifdef HAVE_LANGINFO_CODESET
  38 #include <langinfo.h>
  39 #endif
  40
  41 #include <getopt.h>
  42
  43 extern void fatal_error (const char *msgid, ...)
  44      ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  45 void warning (const char *msgid, ...) ATTRIBUTE_PRINTF_1;
  46 void report (void);
  47
  48 static void usage (void) ATTRIBUTE_NORETURN;
  49 static void help (void) ATTRIBUTE_NORETURN;
  50 static void version (void) ATTRIBUTE_NORETURN;
  51
  52 #define JC1_LITE
  53 #include "jcf.h"
  54 #include "parse.h"
  55
  56 /* Current input file and output file IO streams.  */
  57 FILE *finput, *out;
  58
  59 /* Executable name.  */
  60 char *exec_name;
  61
  62 /* Flags matching command line options.  */
  63 int flag_find_main = 0;
  64 int flag_dump_class = 0;
  65 int flag_list_filename = 0;
  66 int flag_complexity = 0;
  67 int flag_assert = 1;
  68
  69 int pedantic = 0;
  70
  71 \f
  72
  73 /* This is used to mark options with no short value.  */
  74 #define LONG_OPT(Num)  ((Num) + 128)
  75
  76 #define OPT_HELP      LONG_OPT (0)
  77 #define OPT_VERSION   LONG_OPT (1)
  78 #define OPT_ENCODING  LONG_OPT (2)
  79
  80 static const struct option options[] =
  81 {
  82   { "help",      no_argument,       NULL, OPT_HELP },
  83   { "version",   no_argument,       NULL, OPT_VERSION },
  84   { "print-main", no_argument,      &flag_find_main, 1 },
  85   { "list-filename", no_argument,   &flag_list_filename, 1 },
  86   { "list-class", no_argument,      &flag_dump_class, 1 },
  87   { "encoding",  required_argument, NULL, OPT_ENCODING },
  88   { "complexity", no_argument,      &flag_complexity, 1 },
  89   { "no-assert", no_argument,       &flag_assert, 0 },
  90   { "assert",    no_argument,       &flag_assert, 1 },
  91   { NULL,        no_argument,       NULL, 0 }
  92 };
  93
  94 static void
  95 usage (void)
  96 {
  97   fprintf (stderr, _("Try `jv-scan --help' for more information.\n"));
  98   exit (1);
  99 }
 100
 101 static void
 102 help (void)
 103 {
 104   printf (_("Usage: jv-scan [OPTION]... FILE...\n\n"));
 105   printf (_("Print useful information read from Java source files.\n\n"));
 106   printf (_("  --no-assert             Don't recognize the assert keyword\n"));
 107   printf (_("  --complexity            Print cyclomatic complexity of input file\n"));
 108   printf (_("  --encoding NAME         Specify encoding of input file\n"));
 109   printf (_("  --print-main            Print name of class containing `main'\n"));
 110   printf (_("  --list-class            List all classes defined in file\n"));
 111   printf (_("  --list-filename         Print input filename when listing class names\n"));
 112   printf (_("  -o FILE                 Set output file name\n"));
 113   printf ("\n");
 114   printf (_("  --help                  Print this help, then exit\n"));
 115   printf (_("  --version               Print version number, then exit\n"));
 116   printf ("\n");
 117   printf (_("For bug reporting instructions, please see:\n"
 118             "%s.\n"), bug_report_url);
 119   exit (0);
 120 }
 121
 122 static void
 123 version (void)
 124 {
 125   printf ("jv-scan (GCC) %s\n\n", version_string);
 126   printf ("Copyright %s 2004 Free Software Foundation, Inc.\n", _("(C)"));
 127   printf (_("This is free software; see the source for copying conditions.  There is NO\n"
 128             "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
 129   exit (0);
 130 }
 131
 132 /* jc1-lite main entry point */
 133 int
 134 main (int argc, char **argv)
 135 {
 136   int i = 1;
 137   const char *output_file = NULL;
 138   const char *encoding = NULL;
 139   long ft;
 140   int opt;
 141
 142   exec_name = argv[0];
 143
 144   /* Default for output */
 145   out = stdout;
 146
 147   gcc_init_libintl ();
 148
 149   /* Process options first.  We use getopt_long and not
 150      getopt_long_only because we only support `--' long options here.  */
 151   while ((opt = getopt_long (argc, argv, "o:", options, NULL)) != -1)
 152     {
 153       switch (opt)
 154         {
 155         case 0:
 156           /* Already handled.  */
 157           break;
 158
 159         case 'o':
 160           output_file = optarg;
 161           break;
 162
 163         case OPT_HELP:
 164           help ();
 165           break;
 166
 167         case OPT_VERSION:
 168           version ();
 169           break;
 170
 171         case OPT_ENCODING:
 172           encoding = optarg;
 173           break;
 174
 175         default:
 176           usage ();
 177           break;
 178         }
 179     }
 180
 181   /* No flags? Do nothing */
 182   if (! flag_find_main && ! flag_dump_class && ! flag_complexity)
 183     return 0;
 184
 185   /* Check on bad usage */
 186   if (flag_find_main + flag_dump_class + flag_complexity > 1)
 187     fatal_error
 188       ("only one of `--print-main', `--list-class', and `--complexity' allowed");
 189
 190   if (output_file && !(out = fopen (output_file, "w")))
 191     fatal_error ("can't open output file `%s'", output_file);
 192
 193   ft = ftell (out);
 194
 195   gcc_obstack_init (&temporary_obstack);
 196   java_push_parser_context ();
 197
 198   for ( i = optind; i < argc; i++ )
 199     if (argv [i])
 200       {
 201         input_filename = argv [i];
 202         if ( (finput = fopen (argv [i], "r")) )
 203           {
 204             /* There's no point in trying to find the current encoding
 205                unless we are going to do something intelligent with it
 206                -- hence the test for iconv.  */
 207 #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_LANGINFO_CODESET)
 208             setlocale (LC_CTYPE, "");
 209             if (encoding == NULL)
 210               encoding = nl_langinfo (CODESET);
 211 #endif
 212             if (encoding == NULL || *encoding == '\0')
 213               encoding = DEFAULT_ENCODING;
 214
 215             java_init_lex (finput, encoding);
 216             yyparse ();
 217             report ();
 218             if (ftell (out) != ft)
 219               fputc ('\n', out);
 220             ft = ftell (out);
 221             fclose (finput);
 222             reset_report ();
 223           }
 224         else
 225           fatal_error ("file not found `%s'", argv [i]);
 226       }
 227
 228   /* Flush and close */
 229   if (ftell (out) != ft)
 230     fputc ('\n', out);
 231   if (!output_file)
 232     fclose (out);
 233
 234   return 0;
 235 }
 236
 237 \f
 238
 239 /* Error report, memory, obstack initialization and other utility
 240    functions */
 241
 242 void
 243 fatal_error (const char *msgid, ...)
 244 {
 245   va_list ap;
 246   va_start (ap, msgid);
 247   fprintf (stderr, _("%s: error: "), exec_name);
 248   vfprintf (stderr, _(msgid), ap);
 249   fputc ('\n', stderr);
 250   va_end (ap);
 251   exit (1);
 252 }
 253
 254 void
 255 warning (const char *msgid, ...)
 256 {
 257   va_list ap;
 258   va_start (ap, msgid);
 259   fprintf (stderr, _("%s: warning: "), exec_name);
 260   vfprintf (stderr, _(msgid), ap);
 261   fputc ('\n', stderr);
 262   va_end (ap);
 263 }