gcc/java/jv-scan.c

   1 /* Main for jv-scan
   2    Copyright (C) 1998, 1999, 2000, 2001 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
  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 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   { NULL,        no_argument,       NULL, 0 }
  89 };
  90
  91 static void
  92 usage ()
  93 {
  94   fprintf (stderr, "Try `jv-scan --help' for more information.\n");
  95   exit (1);
  96 }
  97
  98 static void
  99 help ()
 100 {
 101   printf ("Usage: jv-scan [OPTION]... FILE...\n\n");
 102   printf ("Print useful information read from Java source files.\n\n");
 103   printf ("  --complexity            Print cyclomatic complexity of input file\n");
 104   printf ("  --encoding NAME         Specify encoding of input file\n");
 105   printf ("  --print-main            Print name of class containing `main'\n");
 106   printf ("  --list-class            List all classes defined in file\n");
 107   printf ("  --list-filename         Print input filename when listing class names\n");
 108   printf ("  -o FILE                 Set output file name\n");
 109   printf ("\n");
 110   printf ("  --help                  Print this help, then exit\n");
 111   printf ("  --version               Print version number, then exit\n");
 112   printf ("\n");
 113   printf ("For bug reporting instructions, please see:\n");
 114   printf ("%s.\n", GCCBUGURL);
 115   exit (0);
 116 }
 117
 118 static void
 119 version ()
 120 {
 121   printf ("jv-scan (%s)\n\n", version_string);
 122   printf ("Copyright (C) 2001 Free Software Foundation, Inc.\n");
 123   printf ("This is free software; see the source for copying conditions.  There is NO\n");
 124   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 125   exit (0);
 126 }
 127
 128 /* jc1-lite main entry point */
 129 int
 130 DEFUN (main, (argc, argv),
 131        int argc AND char **argv)
 132 {
 133   int i = 1;
 134   const char *output_file = NULL;
 135   const char *encoding = NULL;
 136   long ft;
 137   int opt;
 138
 139   exec_name = argv[0];
 140
 141   /* Default for output */
 142   out = stdout;
 143
 144   /* Process options first.  We use getopt_long and not
 145      getopt_long_only because we only support `--' long options here.  */
 146   while ((opt = getopt_long (argc, argv, "o:", options, NULL)) != -1)
 147     {
 148       switch (opt)
 149         {
 150         case 0:
 151           /* Already handled.  */
 152           break;
 153
 154         case 'o':
 155           output_file = optarg;
 156           break;
 157
 158         case OPT_HELP:
 159           help ();
 160           break;
 161
 162         case OPT_VERSION:
 163           version ();
 164           break;
 165
 166         case OPT_ENCODING:
 167           encoding = optarg;
 168           break;
 169
 170         default:
 171           usage ();
 172           break;
 173         }
 174     }
 175
 176   /* No flags? Do nothing */
 177   if (! flag_find_main && ! flag_dump_class && ! flag_complexity)
 178     return 0;
 179
 180   /* Check on bad usage */
 181   if (flag_find_main + flag_dump_class + flag_complexity > 1)
 182     fatal_error
 183       ("Only one of `--print-main', `--list-class', and `--complexity' allowed");
 184
 185   if (output_file && !(out = fopen (output_file, "w")))
 186     fatal_error ("Can't open output file `%s'", output_file);
 187
 188   ft = ftell (out);
 189
 190   gcc_obstack_init (&temporary_obstack);
 191   java_push_parser_context ();
 192
 193   for ( i = optind; i < argc; i++ )
 194     if (argv [i])
 195       {
 196         input_filename = argv [i];
 197         if ( (finput = fopen (argv [i], "r")) )
 198           {
 199             /* There's no point in trying to find the current encoding
 200                unless we are going to do something intelligent with it
 201                -- hence the test for iconv.  */
 202 #ifdef HAVE_ICONV
 203 #ifdef HAVE_NL_LANGINFO
 204             setlocale (LC_CTYPE, "");
 205             if (encoding == NULL)
 206               encoding = nl_langinfo (CODESET);
 207 #endif /* HAVE_NL_LANGINFO */
 208 #endif /* HAVE_ICONV */
 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 VPARAMS ((const char *s, ...))
 241 {
 242 #ifndef ANSI_PROTOTYPES
 243   const char *s;
 244 #endif
 245   va_list ap;
 246
 247   VA_START (ap, s);
 248
 249 #ifndef ANSI_PROTOTYPES
 250   s = va_arg (ap, const char *);
 251 #endif
 252
 253   fprintf (stderr, "%s: error: ", exec_name);
 254   vfprintf (stderr, s, ap);
 255   fputc ('\n', stderr);
 256   va_end (ap);
 257   exit (1);
 258 }
 259
 260 void
 261 warning VPARAMS ((const char *s, ...))
 262 {
 263 #ifndef ANSI_PROTOTYPES
 264   const char *s;
 265 #endif
 266   va_list ap;
 267
 268   VA_START (ap, s);
 269
 270 #ifndef ANSI_PROTOTYPES
 271   s = va_arg (ap, const char *);
 272 #endif
 273
 274   fprintf (stderr, "%s: warning: ", exec_name);
 275   vfprintf (stderr, s, ap);
 276   fputc ('\n', stderr);
 277   va_end (ap);
 278 }
 279
 280 void
 281 gcc_obstack_init (obstack)
 282      struct obstack *obstack;
 283 {
 284   /* Let particular systems override the size of a chunk.  */
 285 #ifndef OBSTACK_CHUNK_SIZE
 286 #define OBSTACK_CHUNK_SIZE 0
 287 #endif
 288   /* Let them override the alloc and free routines too.  */
 289 #ifndef OBSTACK_CHUNK_ALLOC
 290 #define OBSTACK_CHUNK_ALLOC xmalloc
 291 #endif
 292 #ifndef OBSTACK_CHUNK_FREE
 293 #define OBSTACK_CHUNK_FREE free
 294 #endif
 295   _obstack_begin (obstack, OBSTACK_CHUNK_SIZE, 0,
 296                   (void *(*) (long)) OBSTACK_CHUNK_ALLOC,
 297                   (void (*) (void *)) OBSTACK_CHUNK_FREE);
 298 }