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 struct line_maps line_table;
  63
  64 /* Flags matching command line options.  */
  65 int flag_find_main = 0;
  66 int flag_dump_class = 0;
  67 int flag_list_filename = 0;
  68 int flag_complexity = 0;
  69 int flag_assert = 1;
  70
  71 int pedantic = 0;
  72
  73 \f
  74
  75 /* This is used to mark options with no short value.  */
  76 #define LONG_OPT(Num)  ((Num) + 128)
  77
  78 #define OPT_HELP      LONG_OPT (0)
  79 #define OPT_VERSION   LONG_OPT (1)
  80 #define OPT_ENCODING  LONG_OPT (2)
  81
  82 static const struct option options[] =
  83 {
  84   { "help",      no_argument,       NULL, OPT_HELP },
  85   { "version",   no_argument,       NULL, OPT_VERSION },
  86   { "print-main", no_argument,      &flag_find_main, 1 },
  87   { "list-filename", no_argument,   &flag_list_filename, 1 },
  88   { "list-class", no_argument,      &flag_dump_class, 1 },
  89   { "encoding",  required_argument, NULL, OPT_ENCODING },
  90   { "complexity", no_argument,      &flag_complexity, 1 },
  91   { "no-assert", no_argument,       &flag_assert, 0 },
  92   { "assert",    no_argument,       &flag_assert, 1 },
  93   { NULL,        no_argument,       NULL, 0 }
  94 };
  95
  96 static void
  97 usage (void)
  98 {
  99   fprintf (stderr, _("Try 'jv-scan --help' for more information.\n"));
 100   exit (1);
 101 }
 102
 103 static void
 104 help (void)
 105 {
 106   printf (_("Usage: jv-scan [OPTION]... FILE...\n\n"));
 107   printf (_("Print useful information read from Java source files.\n\n"));
 108   printf (_("  --no-assert             Don't recognize the assert keyword\n"));
 109   printf (_("  --complexity            Print cyclomatic complexity of input file\n"));
 110   printf (_("  --encoding NAME         Specify encoding of input file\n"));
 111   printf (_("  --print-main            Print name of class containing 'main'\n"));
 112   printf (_("  --list-class            List all classes defined in file\n"));
 113   printf (_("  --list-filename         Print input filename when listing class names\n"));
 114   printf (_("  -o FILE                 Set output file name\n"));
 115   printf ("\n");
 116   printf (_("  --help                  Print this help, then exit\n"));
 117   printf (_("  --version               Print version number, then exit\n"));
 118   printf ("\n");
 119   printf (_("For bug reporting instructions, please see:\n"
 120             "%s.\n"), bug_report_url);
 121   exit (0);
 122 }
 123
 124 static void
 125 version (void)
 126 {
 127   printf ("jv-scan (GCC) %s\n\n", version_string);
 128   printf ("Copyright %s 2004 Free Software Foundation, Inc.\n", _("(C)"));
 129   printf (_("This is free software; see the source for copying conditions.  There is NO\n"
 130             "warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n"));
 131   exit (0);
 132 }
 133
 134 #ifdef USE_MAPPED_LOCATION
 135 /* FIXME - this is the same as the function in tree.c, which is awkward.
 136    Probably the cleanest solution is to move the function to line-map.c.
 137    This is difficult as long as we still support --disable-mapped-location,
 138    since whether expanded_location has a column fields depends on
 139    USE_MAPPED_LOCATION. */
 140
 141 expanded_location
 142 expand_location (source_location loc)
 143 {
 144   expanded_location xloc;
 145   if (loc == 0) { xloc.file = NULL; xloc.line = 0;  xloc.column = 0; }
 146   else
 147     {
 148       const struct line_map *map = linemap_lookup (&line_table, loc);
 149       xloc.file = map->to_file;
 150       xloc.line = SOURCE_LINE (map, loc);
 151       xloc.column = SOURCE_COLUMN (map, loc);
 152     };
 153   return xloc;
 154 }
 155 #endif
 156
 157 /* jc1-lite main entry point */
 158 int
 159 main (int argc, char **argv)
 160 {
 161   int i = 1;
 162   const char *output_file = NULL;
 163   const char *encoding = NULL;
 164   long ft;
 165   int opt;
 166
 167   exec_name = argv[0];
 168
 169   /* Default for output */
 170   out = stdout;
 171
 172   gcc_init_libintl ();
 173
 174   /* Process options first.  We use getopt_long and not
 175      getopt_long_only because we only support `--' long options here.  */
 176   while ((opt = getopt_long (argc, argv, "o:", options, NULL)) != -1)
 177     {
 178       switch (opt)
 179         {
 180         case 0:
 181           /* Already handled.  */
 182           break;
 183
 184         case 'o':
 185           output_file = optarg;
 186           break;
 187
 188         case OPT_HELP:
 189           help ();
 190           break;
 191
 192         case OPT_VERSION:
 193           version ();
 194           break;
 195
 196         case OPT_ENCODING:
 197           encoding = optarg;
 198           break;
 199
 200         default:
 201           usage ();
 202           break;
 203         }
 204     }
 205
 206   /* No flags? Do nothing */
 207   if (! flag_find_main && ! flag_dump_class && ! flag_complexity)
 208     return 0;
 209
 210   /* Check on bad usage */
 211   if (flag_find_main + flag_dump_class + flag_complexity > 1)
 212     fatal_error
 213       ("only one of '--print-main', '--list-class', and '--complexity' allowed");
 214
 215   if (output_file && !(out = fopen (output_file, "w")))
 216     fatal_error ("can't open output file '%s'", output_file);
 217
 218   ft = ftell (out);
 219
 220   gcc_obstack_init (&temporary_obstack);
 221   java_push_parser_context ();
 222
 223   for ( i = optind; i < argc; i++ )
 224     if (argv [i])
 225       {
 226         char *filename = argv[i];
 227         if ( (finput = fopen (filename, "r")) )
 228           {
 229             /* There's no point in trying to find the current encoding
 230                unless we are going to do something intelligent with it
 231                -- hence the test for iconv.  */
 232 #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_LANGINFO_CODESET)
 233             setlocale (LC_CTYPE, "");
 234             if (encoding == NULL)
 235               encoding = nl_langinfo (CODESET);
 236 #endif
 237             if (encoding == NULL || *encoding == '\0')
 238               encoding = DEFAULT_ENCODING;
 239
 240             java_init_lex (finput, encoding);
 241             ctxp->filename = filename;
 242             yyparse ();
 243             report ();
 244             if (ftell (out) != ft)
 245               fputc ('\n', out);
 246             ft = ftell (out);
 247             fclose (finput);
 248             reset_report ();
 249           }
 250         else
 251           fatal_error ("file not found '%s'", argv [i]);
 252       }
 253
 254   /* Flush and close */
 255   if (ftell (out) != ft)
 256     fputc ('\n', out);
 257   if (!output_file)
 258     fclose (out);
 259
 260   return 0;
 261 }
 262
 263 \f
 264
 265 /* Error report, memory, obstack initialization and other utility
 266    functions */
 267
 268 void
 269 fatal_error (const char *msgid, ...)
 270 {
 271   va_list ap;
 272   va_start (ap, msgid);
 273   fprintf (stderr, _("%s: error: "), exec_name);
 274   vfprintf (stderr, _(msgid), ap);
 275   fputc ('\n', stderr);
 276   va_end (ap);
 277   exit (1);
 278 }
 279
 280 void
 281 warning (const char *msgid, ...)
 282 {
 283   va_list ap;
 284   va_start (ap, msgid);
 285   fprintf (stderr, _("%s: warning: "), exec_name);
 286   vfprintf (stderr, _(msgid), ap);
 287   fputc ('\n', stderr);
 288   va_end (ap);
 289 }
 290
 291 void
 292 fancy_abort (const char *file, int line, const char *func)
 293 {
 294   fatal_error ("abort in %s, at %s:%d", func, file, line);
 295 }