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 gcc_obstack_init (struct obstack *obstack);
  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 /* Current input filename.  */
  60 char *input_filename;
  61
  62 /* Executable name.  */
  63 char *exec_name;
  64
  65 /* Flags matching command line options.  */
  66 int flag_find_main = 0;
  67 int flag_dump_class = 0;
  68 int flag_list_filename = 0;
  69 int flag_complexity = 0;
  70 int flag_assert = 1;
  71
  72 int pedantic = 0;
  73
  74 \f
  75
  76 /* This is used to mark options with no short value.  */
  77 #define LONG_OPT(Num)  ((Num) + 128)
  78
  79 #define OPT_HELP      LONG_OPT (0)
  80 #define OPT_VERSION   LONG_OPT (1)
  81 #define OPT_ENCODING  LONG_OPT (2)
  82
  83 static const struct option options[] =
  84 {
  85   { "help",      no_argument,       NULL, OPT_HELP },
  86   { "version",   no_argument,       NULL, OPT_VERSION },
  87   { "print-main", no_argument,      &flag_find_main, 1 },
  88   { "list-filename", no_argument,   &flag_list_filename, 1 },
  89   { "list-class", no_argument,      &flag_dump_class, 1 },
  90   { "encoding",  required_argument, NULL, OPT_ENCODING },
  91   { "complexity", no_argument,      &flag_complexity, 1 },
  92   { "no-assert", no_argument,       &flag_assert, 0 },
  93   { "assert",    no_argument,       &flag_assert, 1 },
  94   { NULL,        no_argument,       NULL, 0 }
  95 };
  96
  97 static void
  98 usage (void)
  99 {
 100   fprintf (stderr, "Try `jv-scan --help' for more information.\n");
 101   exit (1);
 102 }
 103
 104 static void
 105 help (void)
 106 {
 107   printf ("Usage: jv-scan [OPTION]... FILE...\n\n");
 108   printf ("Print useful information read from Java source files.\n\n");
 109   printf ("  --no-assert             Don't recognize the assert keyword\n");
 110   printf ("  --complexity            Print cyclomatic complexity of input file\n");
 111   printf ("  --encoding NAME         Specify encoding of input file\n");
 112   printf ("  --print-main            Print name of class containing `main'\n");
 113   printf ("  --list-class            List all classes defined in file\n");
 114   printf ("  --list-filename         Print input filename when listing class names\n");
 115   printf ("  -o FILE                 Set output file name\n");
 116   printf ("\n");
 117   printf ("  --help                  Print this help, then exit\n");
 118   printf ("  --version               Print version number, then exit\n");
 119   printf ("\n");
 120   printf ("For bug reporting instructions, please see:\n");
 121   printf ("%s.\n", bug_report_url);
 122   exit (0);
 123 }
 124
 125 static void
 126 version (void)
 127 {
 128   printf ("jv-scan (GCC) %s\n\n", version_string);
 129   printf ("Copyright (C) 2002 Free Software Foundation, Inc.\n");
 130   printf ("This is free software; see the source for copying conditions.  There is NO\n");
 131   printf ("warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n\n");
 132   exit (0);
 133 }
 134
 135 /* jc1-lite main entry point */
 136 int
 137 main (int argc, char **argv)
 138 {
 139   int i = 1;
 140   const char *output_file = NULL;
 141   const char *encoding = NULL;
 142   long ft;
 143   int opt;
 144
 145   exec_name = argv[0];
 146
 147   /* Default for output */
 148   out = stdout;
 149
 150   /* Process options first.  We use getopt_long and not
 151      getopt_long_only because we only support `--' long options here.  */
 152   while ((opt = getopt_long (argc, argv, "o:", options, NULL)) != -1)
 153     {
 154       switch (opt)
 155         {
 156         case 0:
 157           /* Already handled.  */
 158           break;
 159
 160         case 'o':
 161           output_file = optarg;
 162           break;
 163
 164         case OPT_HELP:
 165           help ();
 166           break;
 167
 168         case OPT_VERSION:
 169           version ();
 170           break;
 171
 172         case OPT_ENCODING:
 173           encoding = optarg;
 174           break;
 175
 176         default:
 177           usage ();
 178           break;
 179         }
 180     }
 181
 182   /* No flags? Do nothing */
 183   if (! flag_find_main && ! flag_dump_class && ! flag_complexity)
 184     return 0;
 185
 186   /* Check on bad usage */
 187   if (flag_find_main + flag_dump_class + flag_complexity > 1)
 188     fatal_error
 189       ("only one of `--print-main', `--list-class', and `--complexity' allowed");
 190
 191   if (output_file && !(out = fopen (output_file, "w")))
 192     fatal_error ("can't open output file `%s'", output_file);
 193
 194   ft = ftell (out);
 195
 196   gcc_obstack_init (&temporary_obstack);
 197   java_push_parser_context ();
 198
 199   for ( i = optind; i < argc; i++ )
 200     if (argv [i])
 201       {
 202         input_filename = argv [i];
 203         if ( (finput = fopen (argv [i], "r")) )
 204           {
 205             /* There's no point in trying to find the current encoding
 206                unless we are going to do something intelligent with it
 207                -- hence the test for iconv.  */
 208 #if defined (HAVE_LOCALE_H) && defined (HAVE_ICONV) && defined (HAVE_LANGINFO_CODESET)
 209             setlocale (LC_CTYPE, "");
 210             if (encoding == NULL)
 211               encoding = nl_langinfo (CODESET);
 212 #endif
 213             if (encoding == NULL || *encoding == '\0')
 214               encoding = DEFAULT_ENCODING;
 215
 216             java_init_lex (finput, encoding);
 217             yyparse ();
 218             report ();
 219             if (ftell (out) != ft)
 220               fputc ('\n', out);
 221             ft = ftell (out);
 222             fclose (finput);
 223             reset_report ();
 224           }
 225         else
 226           fatal_error ("file not found `%s'", argv [i]);
 227       }
 228
 229   /* Flush and close */
 230   if (ftell (out) != ft)
 231     fputc ('\n', out);
 232   if (!output_file)
 233     fclose (out);
 234
 235   return 0;
 236 }
 237
 238 \f
 239
 240 /* Error report, memory, obstack initialization and other utility
 241    functions */
 242
 243 void
 244 fatal_error (const char *s, ...)
 245 {
 246   va_list ap;
 247   va_start (ap, s);
 248   fprintf (stderr, "%s: error: ", exec_name);
 249   vfprintf (stderr, s, ap);
 250   fputc ('\n', stderr);
 251   va_end (ap);
 252   exit (1);
 253 }
 254
 255 void
 256 warning (const char *s, ...)
 257 {
 258   va_list ap;
 259   va_start (ap, s);
 260   fprintf (stderr, "%s: warning: ", exec_name);
 261   vfprintf (stderr, s, ap);
 262   fputc ('\n', stderr);
 263   va_end (ap);
 264 }
 265
 266 void
 267 gcc_obstack_init (struct obstack *obstack)
 268 {
 269   /* Let particular systems override the size of a chunk.  */
 270 #ifndef OBSTACK_CHUNK_SIZE
 271 #define OBSTACK_CHUNK_SIZE 0
 272 #endif
 273   /* Let them override the alloc and free routines too.  */
 274 #ifndef OBSTACK_CHUNK_ALLOC
 275 #define OBSTACK_CHUNK_ALLOC xmalloc
 276 #endif
 277 #ifndef OBSTACK_CHUNK_FREE
 278 #define OBSTACK_CHUNK_FREE free
 279 #endif
 280   _obstack_begin (obstack, OBSTACK_CHUNK_SIZE, 0,
 281                   (void *(*) (long)) OBSTACK_CHUNK_ALLOC,
 282                   (void (*) (void *)) OBSTACK_CHUNK_FREE);
 283 }