gcc/java/jv-scan.c

   1 /* Main for jv-scan
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
   3    Contributed by Alexandre Petit-Bianco (apbianco@cygnus.com)
   4
   5 This file is part of GNU CC.
   6
   7 GNU CC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU CC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU CC; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 #include "config.h"
  23 #include "system.h"
  24
  25 #include "obstack.h"            /* We use obstacks in lex.c */
  26
  27 #include "version.h"
  28
  29 #ifdef HAVE_LOCALE_H
  30 #include <locale.h>
  31 #endif
  32
  33 #ifdef HAVE_NL_LANGINFO
  34 #include <langinfo.h>
  35 #endif
  36
  37 #include <getopt.h>
  38
  39 extern void fatal_error PARAMS ((const char *s, ...))
  40      ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
  41 void warning PARAMS ((const char *s, ...)) ATTRIBUTE_PRINTF_1;
  42 void gcc_obstack_init PARAMS ((struct obstack *obstack));
  43 void report PARAMS ((void));
  44
  45 static void usage PARAMS ((void)) ATTRIBUTE_NORETURN;
  46 static void help PARAMS ((void)) ATTRIBUTE_NORETURN;
  47 static void version PARAMS ((void)) ATTRIBUTE_NORETURN;
  48
  49 #define JC1_LITE
  50 #include "jcf.h"
  51 #include "parse.h"
  52
  53 /* Current input file and output file IO streams.  */
  54 FILE *finput, *out;
  55
  56 /* Current input filename.  */
  57 char *input_filename;
  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 ()
  96 {
  97   fprintf (stderr, "Try `jv-scan --help' for more information.\n");
  98   exit (1);
  99 }
 100
 101 static void
 102 help ()
 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   printf ("%s.\n", GCCBUGURL);
 119   exit (0);
 120 }
 121
 122 static void
 123 version ()
 124 {
 125   printf ("jv-scan (GCC) %s\n\n", version_string);
 126   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
 127   printf ("This is free software; see the source for copying conditions.  There is NO\n");
 128   printf ("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 DEFUN (main, (argc, argv),
 135        int argc AND char **argv)
 136 {
 137   int i = 1;
 138   const char *output_file = NULL;
 139   const char *encoding = NULL;
 140   long ft;
 141   int opt;
 142
 143   exec_name = argv[0];
 144
 145   /* Default for output */
 146   out = stdout;
 147
 148   /* Process options first.  We use getopt_long and not
 149      getopt_long_only because we only support `--' long options here.  */
 150   while ((opt = getopt_long (argc, argv, "o:", options, NULL)) != -1)
 151     {
 152       switch (opt)
 153         {
 154         case 0:
 155           /* Already handled.  */
 156           break;
 157
 158         case 'o':
 159           output_file = optarg;
 160           break;
 161
 162         case OPT_HELP:
 163           help ();
 164           break;
 165
 166         case OPT_VERSION:
 167           version ();
 168           break;
 169
 170         case OPT_ENCODING:
 171           encoding = optarg;
 172           break;
 173
 174         default:
 175           usage ();
 176           break;
 177         }
 178     }
 179
 180   /* No flags? Do nothing */
 181   if (! flag_find_main && ! flag_dump_class && ! flag_complexity)
 182     return 0;
 183
 184   /* Check on bad usage */
 185   if (flag_find_main + flag_dump_class + flag_complexity > 1)
 186     fatal_error
 187       ("only one of `--print-main', `--list-class', and `--complexity' allowed");
 188
 189   if (output_file && !(out = fopen (output_file, "w")))
 190     fatal_error ("can't open output file `%s'", output_file);
 191
 192   ft = ftell (out);
 193
 194   gcc_obstack_init (&temporary_obstack);
 195   java_push_parser_context ();
 196
 197   for ( i = optind; i < argc; i++ )
 198     if (argv [i])
 199       {
 200         input_filename = argv [i];
 201         if ( (finput = fopen (argv [i], "r")) )
 202           {
 203             /* There's no point in trying to find the current encoding
 204                unless we are going to do something intelligent with it
 205                -- hence the test for iconv.  */
 206 #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_NL_LANGINFO)
 207             setlocale (LC_CTYPE, "");
 208             if (encoding == NULL)
 209               encoding = nl_langinfo (CODESET);
 210 #endif
 211             if (encoding == NULL || *encoding == '\0')
 212               encoding = DEFAULT_ENCODING;
 213
 214             java_init_lex (finput, encoding);
 215             yyparse ();
 216             report ();
 217             if (ftell (out) != ft)
 218               fputc ('\n', out);
 219             ft = ftell (out);
 220             fclose (finput);
 221             reset_report ();
 222           }
 223         else
 224           fatal_error ("file not found `%s'", argv [i]);
 225       }
 226
 227   /* Flush and close */
 228   if (ftell (out) != ft)
 229     fputc ('\n', out);
 230   if (!output_file)
 231     fclose (out);
 232
 233   return 0;
 234 }
 235
 236 \f
 237
 238 /* Error report, memory, obstack initialization and other utility
 239    functions */
 240
 241 void
 242 fatal_error VPARAMS ((const char *s, ...))
 243 {
 244   VA_OPEN (ap, s);
 245   VA_FIXEDARG (ap, const char *, s);
 246
 247   fprintf (stderr, "%s: error: ", exec_name);
 248   vfprintf (stderr, s, ap);
 249   fputc ('\n', stderr);
 250   VA_CLOSE (ap);
 251   exit (1);
 252 }
 253
 254 void
 255 warning VPARAMS ((const char *s, ...))
 256 {
 257   VA_OPEN (ap, s);
 258   VA_FIXEDARG (ap, const char *, s);
 259
 260   fprintf (stderr, "%s: warning: ", exec_name);
 261   vfprintf (stderr, s, ap);
 262   fputc ('\n', stderr);
 263   VA_CLOSE (ap);
 264 }
 265
 266 void
 267 gcc_obstack_init (obstack)
 268      struct obstack *obstack;
 269 {
 270   /* Let particular systems override the size of a chunk.  */
 271 #ifndef OBSTACK_CHUNK_SIZE
 272 #define OBSTACK_CHUNK_SIZE 0
 273 #endif
 274   /* Let them override the alloc and free routines too.  */
 275 #ifndef OBSTACK_CHUNK_ALLOC
 276 #define OBSTACK_CHUNK_ALLOC xmalloc
 277 #endif
 278 #ifndef OBSTACK_CHUNK_FREE
 279 #define OBSTACK_CHUNK_FREE free
 280 #endif
 281   _obstack_begin (obstack, OBSTACK_CHUNK_SIZE, 0,
 282                   (void *(*) (long)) OBSTACK_CHUNK_ALLOC,
 283                   (void (*) (void *)) OBSTACK_CHUNK_FREE);
 284 }