1 /* Program to generate "main" a Java(TM) class containing a main method. 2 Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc. 3 4 This file is part of GNU CC. 5 6 GNU CC is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU CC is distributed in the hope that it will be useful, 12 but WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 GNU General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU CC; see the file COPYING. If not, write to 18 the Free Software Foundation, 59 Temple Place - Suite 330, 19 Boston, MA 02111-1307, USA. 20 21 Java and all Java-based marks are trademarks or registered trademarks 22 of Sun Microsystems, Inc. in the United States and other countries. 23 The Free Software Foundation is independent of Sun Microsystems, Inc. */ 24 25 /* Written by Per Bothner <bothner@cygnus.com> */ 26 27 #include "config.h" 28 #include "system.h" 29 #include "obstack.h" 30 #include "jcf.h" 31 #include "tree.h" 32 #include "java-tree.h" 33 34 static char * do_mangle_classname PARAMS ((const char *string)); 35 36 struct obstack name_obstack; 37 struct obstack *mangle_obstack = &name_obstack; 38 39 void 40 gcc_obstack_init (obstack) 41 struct obstack *obstack; 42 { 43 /* Let particular systems override the size of a chunk. */ 44 #ifndef OBSTACK_CHUNK_SIZE 45 #define OBSTACK_CHUNK_SIZE 0 46 #endif 47 /* Let them override the alloc and free routines too. */ 48 #ifndef OBSTACK_CHUNK_ALLOC 49 #define OBSTACK_CHUNK_ALLOC xmalloc 50 #endif 51 #ifndef OBSTACK_CHUNK_FREE 52 #define OBSTACK_CHUNK_FREE free 53 #endif 54 _obstack_begin (obstack, OBSTACK_CHUNK_SIZE, 0, 55 (void *(*) PARAMS ((long))) OBSTACK_CHUNK_ALLOC, 56 (void (*) PARAMS ((void *))) OBSTACK_CHUNK_FREE); 57 } 58 59 static void usage (const char *) ATTRIBUTE_NORETURN; 60 61 static void 62 usage (const char *name) 63 { 64 fprintf (stderr, "Usage: %s [OPTIONS]... CLASSNAMEmain [OUTFILE]\n", name); 65 exit (1); 66 } 67 68 int 69 main (int argc, char **argv) 70 { 71 char *classname, *p; 72 FILE *stream; 73 const char *mangled_classname; 74 int i, last_arg; 75 76 if (argc < 2) 77 usage (argv[0]); 78 79 for (i = 1; i < argc; ++i) 80 { 81 if (! strncmp (argv[i], "-D", 2)) 82 { 83 /* Handled later. */ 84 } 85 else 86 break; 87 } 88 89 if (i < argc - 2 || i == argc) 90 usage (argv[0]); 91 last_arg = i; 92 93 classname = argv[i]; 94 95 /* gcj always appends `main' to classname. We need to strip this here. */ 96 p = strrchr (classname, 'm'); 97 if (p == NULL || p == classname || strcmp (p, "main") != 0) 98 usage (argv[0]); 99 else 100 *p = '\0'; 101 102 gcc_obstack_init (mangle_obstack); 103 mangled_classname = do_mangle_classname (classname); 104 105 if (i < argc - 1 && strcmp (argv[i + 1], "-") != 0) 106 { 107 const char *outfile = argv[i + 1]; 108 stream = fopen (outfile, "w"); 109 if (stream == NULL) 110 { 111 fprintf (stderr, "%s: Cannot open output file: %s\n", 112 argv[0], outfile); 113 exit (1); 114 } 115 } 116 else 117 stream = stdout; 118 119 /* At this point every element of ARGV from 1 to LAST_ARG is a `-D' 120 option. Process them appropriately. */ 121 fprintf (stream, "extern const char **_Jv_Compiler_Properties;\n"); 122 fprintf (stream, "static const char *props[] =\n{\n"); 123 for (i = 1; i < last_arg; ++i) 124 { 125 const char *p; 126 fprintf (stream, " \""); 127 for (p = &argv[i][2]; *p; ++p) 128 { 129 if (! ISPRINT (*p)) 130 fprintf (stream, "\\%o", *p); 131 else if (*p == '\\' || *p == '"') 132 fprintf (stream, "\\%c", *p); 133 else 134 putc (*p, stream); 135 } 136 fprintf (stream, "\",\n"); 137 } 138 fprintf (stream, " 0\n};\n\n"); 139 140 fprintf (stream, "extern int %s;\n", mangled_classname); 141 fprintf (stream, "int main (int argc, const char **argv)\n"); 142 fprintf (stream, "{\n"); 143 fprintf (stream, " _Jv_Compiler_Properties = props;\n"); 144 fprintf (stream, " JvRunMain (&%s, argc, argv);\n", mangled_classname); 145 fprintf (stream, "}\n"); 146 if (stream != stdout && fclose (stream) != 0) 147 { 148 fprintf (stderr, "%s: Failed to close output file %s\n", 149 argv[0], argv[2]); 150 exit (1); 151 } 152 return 0; 153 } 154 155 156 static char * 157 do_mangle_classname (string) 158 const char *string; 159 { 160 const char *ptr; 161 int count = 0; 162 163 obstack_grow (&name_obstack, "_ZN", 3); 164 165 for (ptr = string; *ptr; ptr++ ) 166 { 167 if (ptr[0] == '.') 168 { 169 append_gpp_mangled_name (&ptr [-count], count); 170 count = 0; 171 } 172 else 173 count++; 174 } 175 append_gpp_mangled_name (&ptr [-count], count); 176 obstack_grow (mangle_obstack, "6class$E", 8); 177 obstack_1grow (mangle_obstack, '\0'); 178 return obstack_finish (mangle_obstack); 179 } 180