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[binutils.git] / binutils / cxxfilt.c
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1 /* Demangler for GNU C++ - main program
2 Copyright 1989, 1991, 1994, 1995, 1996, 1997, 1998, 1999,
3 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
4 Written by James Clark (jjc@jclark.uucp)
5 Rewritten by Fred Fish (fnf@cygnus.com) for ARM and Lucid demangling
6 Modified by Satish Pai (pai@apollo.hp.com) for HP demangling
8 This file is part of GCC.
10 GCC is free software; you can redistribute it and/or modify it under
11 the terms of the GNU General Public License as published by the Free
12 Software Foundation; either version 2, or (at your option) any later
13 version.
15 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
16 WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
18 for more details.
20 You should have received a copy of the GNU General Public License
21 along with GCC; see the file COPYING. If not, write to the Free
22 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
23 02111-1307, USA. */
25 #include "config.h"
26 #include "bfd.h"
27 #include "bucomm.h"
28 #include "libiberty.h"
29 #include "demangle.h"
30 #include "getopt.h"
31 #include "safe-ctype.h"
33 static int flags = DMGL_PARAMS | DMGL_ANSI | DMGL_VERBOSE;
35 static void demangle_it (char *);
36 static void usage (FILE *, int) ATTRIBUTE_NORETURN;
37 static void print_demangler_list (FILE *);
39 static void
40 demangle_it (char *mangled_name)
42 char *result;
44 /* For command line args, also try to demangle type encodings. */
45 result = cplus_demangle (mangled_name, flags | DMGL_TYPES);
46 if (result == NULL)
48 printf ("%s\n", mangled_name);
50 else
52 printf ("%s\n", result);
53 free (result);
57 static void
58 print_demangler_list (FILE *stream)
60 const struct demangler_engine *demangler;
62 fprintf (stream, "{%s", libiberty_demanglers->demangling_style_name);
64 for (demangler = libiberty_demanglers + 1;
65 demangler->demangling_style != unknown_demangling;
66 ++demangler)
67 fprintf (stream, ",%s", demangler->demangling_style_name);
69 fprintf (stream, "}");
72 static void
73 usage (FILE *stream, int status)
75 fprintf (stream, "\
76 Usage: %s [-_] [-n] [--strip-underscores] [--no-strip-underscores]\n\
77 [-p] [--no-params]\n",
78 program_name);
80 fprintf (stream, "\
81 [-s ");
82 print_demangler_list (stream);
83 fprintf (stream, "]\n");
85 fprintf (stream, "\
86 [--format ");
87 print_demangler_list (stream);
88 fprintf (stream, "]\n");
90 fprintf (stream, "\
91 [--help] [--version] [arg...]\n");
92 exit (status);
95 #define MBUF_SIZE 32767
96 char mbuffer[MBUF_SIZE];
98 int strip_underscore = 0;
100 static const struct option long_options[] = {
101 {"strip-underscores", no_argument, 0, '_'},
102 {"format", required_argument, 0, 's'},
103 {"help", no_argument, 0, 'h'},
104 {"no-params", no_argument, 0, 'p'},
105 {"no-strip-underscores", no_argument, 0, 'n'},
106 {"version", no_argument, 0, 'v'},
107 {0, no_argument, 0, 0}
110 static const char *standard_symbol_characters (void);
112 static const char *hp_symbol_characters (void);
114 /* Return the string of non-alnum characters that may occur
115 as a valid symbol component, in the standard assembler symbol
116 syntax. */
118 static const char *
119 standard_symbol_characters (void)
121 return "_$.";
125 /* Return the string of non-alnum characters that may occur
126 as a valid symbol name component in an HP object file.
128 Note that, since HP's compiler generates object code straight from
129 C++ source, without going through an assembler, its mangled
130 identifiers can use all sorts of characters that no assembler would
131 tolerate, so the alphabet this function creates is a little odd.
132 Here are some sample mangled identifiers offered by HP:
134 typeid*__XT24AddressIndExpClassMember_
135 [Vftptr]key:__dt__32OrdinaryCompareIndExpClassMemberFv
136 __ct__Q2_9Elf64_Dyn18{unnamed.union.#1}Fv
138 This still seems really weird to me, since nowhere else in this
139 file is there anything to recognize curly brackets, parens, etc.
140 I've talked with Srikanth <srikanth@cup.hp.com>, and he assures me
141 this is right, but I still strongly suspect that there's a
142 misunderstanding here.
144 If we decide it's better for c++filt to use HP's assembler syntax
145 to scrape identifiers out of its input, here's the definition of
146 the symbol name syntax from the HP assembler manual:
148 Symbols are composed of uppercase and lowercase letters, decimal
149 digits, dollar symbol, period (.), ampersand (&), pound sign(#) and
150 underscore (_). A symbol can begin with a letter, digit underscore or
151 dollar sign. If a symbol begins with a digit, it must contain a
152 non-digit character.
154 So have fun. */
155 static const char *
156 hp_symbol_characters (void)
158 return "_$.<>#,*&[]:(){}";
161 extern int main (int, char **);
164 main (int argc, char **argv)
166 char *result;
167 int c;
168 const char *valid_symbols;
169 enum demangling_styles style = auto_demangling;
171 program_name = argv[0];
172 xmalloc_set_program_name (program_name);
174 strip_underscore = TARGET_PREPENDS_UNDERSCORE;
176 while ((c = getopt_long (argc, argv, "_nps:", long_options, (int *) 0)) != EOF)
178 switch (c)
180 case '?':
181 usage (stderr, 1);
182 break;
183 case 'h':
184 usage (stdout, 0);
185 case 'n':
186 strip_underscore = 0;
187 break;
188 case 'p':
189 flags &= ~ DMGL_PARAMS;
190 break;
191 case 'v':
192 print_version ("c++filt");
193 return (0);
194 case '_':
195 strip_underscore = 1;
196 break;
197 case 's':
199 style = cplus_demangle_name_to_style (optarg);
200 if (style == unknown_demangling)
202 fprintf (stderr, "%s: unknown demangling style `%s'\n",
203 program_name, optarg);
204 return (1);
206 else
207 cplus_demangle_set_style (style);
209 break;
213 if (optind < argc)
215 for ( ; optind < argc; optind++)
217 demangle_it (argv[optind]);
220 else
222 switch (current_demangling_style)
224 case gnu_demangling:
225 case lucid_demangling:
226 case arm_demangling:
227 case java_demangling:
228 case edg_demangling:
229 case gnat_demangling:
230 case gnu_v3_demangling:
231 case auto_demangling:
232 valid_symbols = standard_symbol_characters ();
233 break;
234 case hp_demangling:
235 valid_symbols = hp_symbol_characters ();
236 break;
237 default:
238 /* Folks should explicitly indicate the appropriate alphabet for
239 each demangling. Providing a default would allow the
240 question to go unconsidered. */
241 fatal ("Internal error: no symbol alphabet for current style");
244 for (;;)
246 int i = 0;
247 c = getchar ();
248 /* Try to read a label. */
249 while (c != EOF && (ISALNUM (c) || strchr (valid_symbols, c)))
251 if (i >= MBUF_SIZE-1)
252 break;
253 mbuffer[i++] = c;
254 c = getchar ();
256 if (i > 0)
258 int skip_first = 0;
260 mbuffer[i] = 0;
261 if (mbuffer[0] == '.' || mbuffer[0] == '$')
262 ++skip_first;
263 if (strip_underscore && mbuffer[skip_first] == '_')
264 ++skip_first;
266 if (skip_first > i)
267 skip_first = i;
269 flags |= (int) style;
270 result = cplus_demangle (mbuffer + skip_first, flags);
271 if (result)
273 if (mbuffer[0] == '.')
274 putc ('.', stdout);
275 fputs (result, stdout);
276 free (result);
278 else
279 fputs (mbuffer, stdout);
281 fflush (stdout);
283 if (c == EOF)
284 break;
285 putchar (c);
286 fflush (stdout);
290 return (0);