gcc/java/jv-scan.c

   1 /* Main for jv-scan
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003
   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
  28 #include "obstack.h"            /* We use obstacks in lex.c */
  29
  30 #include "version.h"
  31
  32 #ifdef HAVE_LOCALE_H
  33 #include <locale.h>
  34 #endif
  35
  36 #ifdef HAVE_LANGINFO_CODESET
  37 #include <langinfo.h>
  38 #endif
  39
  40 #include <getopt.h>
  41
  42 extern void fatal_error (const char *s, ...)
  43      ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  44 void warning (const char *s, ...) ATTRIBUTE_PRINTF_1;
  45 void report (void);
  46
  47 static void usage (void) ATTRIBUTE_NORETURN;
  48 static void help (void) ATTRIBUTE_NORETURN;
  49 static void version (void) ATTRIBUTE_NORETURN;
  50
  51 #define JC1_LITE
  52 #include "jcf.h"
  53 #include "parse.h"
  54
  55 /* Current input file and output file IO streams.  */
  56 FILE *finput, *out;
  57
  58 /* Executable name.  */
  59 char *exec_name;
  60
  61 /* Flags matching command line options.  */
  62 int flag_find_main = 0;
  63 int flag_dump_class = 0;
  64 int flag_list_filename = 0;
  65 int flag_complexity = 0;
  66 int flag_assert = 1;
  67
  68 int pedantic = 0;
  69
  70 \f
  71
  72 /* This is used to mark options with no short value.  */
  73 #define LONG_OPT(Num)  ((Num) + 128)
  74
  75 #define OPT_HELP      LONG_OPT (0)
  76 #define OPT_VERSION   LONG_OPT (1)
  77 #define OPT_ENCODING  LONG_OPT (2)
  78
  79 static const struct option options[] =
  80 {
  81   { "help",      no_argument,       NULL, OPT_HELP },
  82   { "version",   no_argument,       NULL, OPT_VERSION },
  83   { "print-main", no_argument,      &flag_find_main, 1 },
  84   { "list-filename", no_argument,   &flag_list_filename, 1 },
  85   { "list-class", no_argument,      &flag_dump_class, 1 },
  86   { "encoding",  required_argument, NULL, OPT_ENCODING },
  87   { "complexity", no_argument,      &flag_complexity, 1 },
  88   { "no-assert", no_argument,       &flag_assert, 0 },
  89   { "assert",    no_argument,       &flag_assert, 1 },
  90   { NULL,        no_argument,       NULL, 0 }
  91 };
  92
  93 static void
  94 usage (void)
  95 {
  96   fprintf (stderr, "Try `jv-scan --help' for more information.\n");
  97   exit (1);
  98 }
  99
 100 static void
 101 help (void)
 102 {
 103   printf ("Usage: jv-scan [OPTION]... FILE...\n\n");
 104   printf ("Print useful information read from Java source files.\n\n");
 105   printf ("  --no-assert             Don't recognize the assert keyword\n");
 106   printf ("  --complexity            Print cyclomatic complexity of input file\n");
 107   printf ("  --encoding NAME         Specify encoding of input file\n");
 108   printf ("  --print-main            Print name of class containing `main'\n");
 109   printf ("  --list-class            List all classes defined in file\n");
 110   printf ("  --list-filename         Print input filename when listing class names\n");
 111   printf ("  -o FILE                 Set output file name\n");
 112   printf ("\n");
 113   printf ("  --help                  Print this help, then exit\n");
 114   printf ("  --version               Print version number, then exit\n");
 115   printf ("\n");
 116   printf ("For bug reporting instructions, please see:\n");
 117   printf ("%s.\n", bug_report_url);
 118   exit (0);
 119 }
 120
 121 static void
 122 version (void)
 123 {
 124   printf ("jv-scan (GCC) %s\n\n", version_string);
 125   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
 126   printf ("This is free software; see the source for copying conditions.  There is NO\n");
 127   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 128   exit (0);
 129 }
 130
 131 /* jc1-lite main entry point */
 132 int
 133 main (int argc, char **argv)
 134 {
 135   int i = 1;
 136   const char *output_file = NULL;
 137   const char *encoding = NULL;
 138   long ft;
 139   int opt;
 140
 141   exec_name = argv[0];
 142
 143   /* Default for output */
 144   out = stdout;
 145
 146   /* Process options first.  We use getopt_long and not
 147      getopt_long_only because we only support `--' long options here.  */
 148   while ((opt = getopt_long (argc, argv, "o:", options, NULL)) != -1)
 149     {
 150       switch (opt)
 151         {
 152         case 0:
 153           /* Already handled.  */
 154           break;
 155
 156         case 'o':
 157           output_file = optarg;
 158           break;
 159
 160         case OPT_HELP:
 161           help ();
 162           break;
 163
 164         case OPT_VERSION:
 165           version ();
 166           break;
 167
 168         case OPT_ENCODING:
 169           encoding = optarg;
 170           break;
 171
 172         default:
 173           usage ();
 174           break;
 175         }
 176     }
 177
 178   /* No flags? Do nothing */
 179   if (! flag_find_main && ! flag_dump_class && ! flag_complexity)
 180     return 0;
 181
 182   /* Check on bad usage */
 183   if (flag_find_main + flag_dump_class + flag_complexity > 1)
 184     fatal_error
 185       ("only one of `--print-main', `--list-class', and `--complexity' allowed");
 186
 187   if (output_file && !(out = fopen (output_file, "w")))
 188     fatal_error ("can't open output file `%s'", output_file);
 189
 190   ft = ftell (out);
 191
 192   gcc_obstack_init (&temporary_obstack);
 193   java_push_parser_context ();
 194
 195   for ( i = optind; i < argc; i++ )
 196     if (argv [i])
 197       {
 198         input_filename = argv [i];
 199         if ( (finput = fopen (argv [i], "r")) )
 200           {
 201             /* There's no point in trying to find the current encoding
 202                unless we are going to do something intelligent with it
 203                -- hence the test for iconv.  */
 204 #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_LANGINFO_CODESET)
 205             setlocale (LC_CTYPE, "");
 206             if (encoding == NULL)
 207               encoding = nl_langinfo (CODESET);
 208 #endif
 209             if (encoding == NULL || *encoding == '\0')
 210               encoding = DEFAULT_ENCODING;
 211
 212             java_init_lex (finput, encoding);
 213             yyparse ();
 214             report ();
 215             if (ftell (out) != ft)
 216               fputc ('\n', out);
 217             ft = ftell (out);
 218             fclose (finput);
 219             reset_report ();
 220           }
 221         else
 222           fatal_error ("file not found `%s'", argv [i]);
 223       }
 224
 225   /* Flush and close */
 226   if (ftell (out) != ft)
 227     fputc ('\n', out);
 228   if (!output_file)
 229     fclose (out);
 230
 231   return 0;
 232 }
 233
 234 \f
 235
 236 /* Error report, memory, obstack initialization and other utility
 237    functions */
 238
 239 void
 240 fatal_error (const char *s, ...)
 241 {
 242   va_list ap;
 243   va_start (ap, s);
 244   fprintf (stderr, "%s: error: ", exec_name);
 245   vfprintf (stderr, s, ap);
 246   fputc ('\n', stderr);
 247   va_end (ap);
 248   exit (1);
 249 }
 250
 251 void
 252 warning (const char *s, ...)
 253 {
 254   va_list ap;
 255   va_start (ap, s);
 256   fprintf (stderr, "%s: warning: ", exec_name);
 257   vfprintf (stderr, s, ap);
 258   fputc ('\n', stderr);
 259   va_end (ap);
 260 }