1 /* Demangler for GNU C++
2 Copyright (C) 1989 Free Software Foundation, Inc.
3 written by James Clark (jjc@jclark.uucp)
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2, or (at your option)
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
19 /* This is for g++ 1.36.1 (November 6 version). It will probably
20 require changes for any other version.
22 Modified for g++ 1.36.2 (November 18 version). */
24 /* This file exports one function
26 char *cplus_demangle (const char *name)
28 If `name' is a mangled function name produced by g++, then
29 a pointer to a malloced string giving a C++ representation
30 of the name will be returned; otherwise NULL will be returned.
31 It is the caller's responsibility to free the string which
36 cplus_demangle ("_foo__1Ai")
42 This file imports xmalloc and xrealloc, which are like malloc and
43 realloc except that they generate a fatal error if there is no
46 #if 0 /* Should really be part of BFD */
47 #define nounderscore 1 /* define this is names don't start with _ */
59 extern char *cplus_demangle (const char *type
);
61 extern char *cplus_demangle ();
64 static char **typevec
= 0;
65 static int ntypes
= 0;
66 static int typevec_size
= 0;
83 "convert", "+", /* unary + */
84 "negate", "-", /* unary - */
90 "postincrement", "++",
91 "postdecrement", "--",
102 "method_call", "->()",
103 "addr", "&", /* unary & */
105 "nop", "", /* for operator= */
108 /* Beware: these aren't '\0' terminated. */
111 char *b
; /* pointer to start of string */
112 char *p
; /* pointer after last character */
113 char *e
; /* pointer after end of allocated space */
117 static void string_need (string
*s
, int n
);
118 static void string_delete (string
*s
);
119 static void string_init (string
*s
);
120 static void string_clear (string
*s
);
121 static int string_empty (string
*s
);
122 static void string_append (string
*p
, const char *s
);
123 static void string_appends (string
*p
, string
*s
);
124 static void string_appendn (string
*p
, const char *s
, int n
);
125 static void string_prepend (string
*p
, const char *s
);
127 static void string_prepends (string
*p
, string
*s
);
129 static void string_prependn (string
*p
, const char *s
, int n
);
130 static int get_count (const char **type
, int *count
);
131 static int do_args (const char **type
, string
*decl
);
132 static int do_type (const char **type
, string
*result
);
133 static int do_arg (const char **type
, string
*result
);
134 static int do_args (const char **type
, string
*decl
);
135 static void munge_function_name (string
*name
);
137 static void string_need ();
138 static void string_delete ();
139 static void string_init ();
140 static void string_clear ();
141 static int string_empty ();
142 static void string_append ();
143 static void string_appends ();
144 static void string_appendn ();
145 static void string_prepend ();
146 static void string_prepends ();
147 static void string_prependn ();
148 static int get_count ();
149 static int do_args ();
150 static int do_type ();
151 static int do_arg ();
152 static int do_args ();
153 static void munge_function_name ();
157 cplus_demangle (type
)
166 const char *p
, *premangle
;
168 if (type
== NULL
|| *type
== '\0')
175 while (*p
!= '\0' && !(*p
== '_' && p
[1] == '_'))
180 if (type
[0] == '_' && type
[1] == '$' && type
[2] == '_')
182 unsigned int l
= (strlen (type
) - 3)*2 + 3 + 2 + 1;
183 char *tem
= (char *) xmalloc (l
);
184 strcpy (tem
, type
+ 3);
186 strcat (tem
, type
+ 3);
190 /* static data member */
191 if (*type
!= '_' && (p
= (char *) strchr (type
, '$')) != NULL
)
193 int n
= strlen (type
) + 2;
194 char *tem
= (char *) xmalloc (n
);
195 memcpy (tem
, type
, p
- type
);
196 strcpy (tem
+ (p
- type
), "::");
197 strcpy (tem
+ (p
- type
) + 2, p
+ 1);
201 if (type
[0] == '_' && type
[1] == 'v' && type
[2] == 't' && type
[3] == '$')
203 int n
= strlen (type
+ 4) + 14 + 1;
204 char *tem
= (char *) xmalloc (n
);
205 strcpy (tem
, type
+ 4);
206 strcat (tem
, " virtual table");
218 string_delete (&decl
);
225 string_appendn (&decl
, type
, p
- type
);
226 munge_function_name (&decl
);
234 /* a const member function */
237 string_delete (&decl
);
260 while (isdigit (*p
));
263 string_delete (&decl
);
268 string_appendn (&decl
, p
, n
);
269 string_append (&decl
, "::");
270 string_appendn (&decl
, p
, n
);
274 string_prepend (&decl
, "::");
275 string_prependn (&decl
, p
, n
);
282 success
= do_args (&p
, &decl
);
284 string_append (&decl
, " const");
288 success
= do_args (&p
, &decl
);
292 for (i
= 0; i
< ntypes
; i
++)
293 if (typevec
[i
] != NULL
)
298 free ((char *)typevec
);
305 string_appendn (&decl
, "", 1);
310 string_delete (&decl
);
316 get_count (type
, count
)
320 if (!isdigit (**type
))
322 *count
= **type
- '0';
324 /* see flush_repeats in cplus-method.c */
325 if (isdigit (**type
))
327 const char *p
= *type
;
335 while (isdigit (*p
));
345 /* result will be initialised here; it will be freed on failure */
348 do_type (type
, result
)
357 const char *remembered_type
;
360 string_init (result
);
364 while (success
&& !done
)
371 string_prepend (&decl
, "*");
376 string_prepend (&decl
, "&");
381 if (!get_count (type
, &n
) || n
>= ntypes
)
385 remembered_type
= typevec
[n
];
386 type
= &remembered_type
;
392 if (!string_empty (&decl
) && decl
.b
[0] == '*')
394 string_prepend (&decl
, "(");
395 string_append (&decl
, ")");
397 if (!do_args (type
, &decl
) || **type
!= '_')
409 member
= **type
== 'M';
411 if (!isdigit (**type
))
423 while (isdigit (**type
));
424 if (strlen (*type
) < n
)
429 string_append (&decl
, ")");
430 string_prepend (&decl
, "::");
431 string_prependn (&decl
, *type
, n
);
432 string_prepend (&decl
, "(");
446 if (*(*type
)++ != 'F')
452 if ((member
&& !do_args (type
, &decl
)) || **type
!= '_')
461 string_append (&decl
, " ");
464 string_append (&decl
, "const");
469 string_append (&decl
, " ");
472 string_append (&decl
, "volatilep");
478 if ((*type
)[1] == 'P')
481 if (!string_empty (&decl
))
482 string_prepend (&decl
, " ");
483 string_prepend (&decl
, "const");
496 while (success
&& !done
)
503 string_append (result
, " ");
506 string_append (result
, "const");
511 string_append (result
, " ");
514 string_append (result
, "unsigned");
519 string_append (result
, " ");
522 string_append (result
, "volatile");
539 string_append (result
, " ");
540 string_append (result
, "void");
545 string_append (result
, " ");
546 string_append (result
, "long");
551 string_append (result
, " ");
552 string_append (result
, "int");
557 string_append (result
, " ");
558 string_append (result
, "short");
563 string_append (result
, " ");
564 string_append (result
, "char");
569 string_append (result
, " ");
570 string_append (result
, "long double");
575 string_append (result
, " ");
576 string_append (result
, "double");
581 string_append (result
, " ");
582 string_append (result
, "float");
586 if (!isdigit (**type
))
609 while (isdigit (**type
));
610 if (strlen (*type
) < n
)
616 string_append (result
, " ");
617 string_appendn (result
, *type
, n
);
627 if (!string_empty (&decl
))
629 string_append (result
, " ");
630 string_appends (result
, &decl
);
632 string_delete (&decl
);
637 string_delete (&decl
);
638 string_delete (result
);
643 /* `result' will be initialised in do_type; it will be freed on failure */
646 do_arg (type
, result
)
656 if (!do_type (type
, result
))
659 if (ntypes
>= typevec_size
)
661 if (typevec_size
== 0)
664 typevec
= (char **) xmalloc (sizeof (char*)*typevec_size
);
669 typevec
= (char **) xrealloc ((char *)typevec
, sizeof (char*)*typevec_size
);
673 tem
= (char *) xmalloc (len
+ 1);
674 memcpy (tem
, start
, len
);
676 typevec
[ntypes
++] = tem
;
680 /* `decl' must be already initialised, usually non-empty;
681 it won't be freed on failure */
698 string_append (decl
, "(");
700 while (**type
!= '_' && **type
!= '\0' && **type
!= 'e' && **type
!= 'v')
707 if (!get_count (type
, &r
) || !get_count (type
, &t
) || t
>= ntypes
)
711 const char *tem
= typevec
[t
];
713 string_append (decl
, ", ");
714 if (!do_arg (&tem
, &arg
))
716 string_appends (decl
, &arg
);
717 string_delete (&arg
);
724 string_append (decl
, ", ");
725 if (!do_arg (type
, &arg
))
731 string_appends (decl
, &arg
);
734 string_delete (&arg
);
740 else if (**type
== 'e')
744 string_append (decl
, ",");
745 string_append (decl
, "...");
748 string_append (decl
, ")");
753 munge_function_name (name
)
756 if (!string_empty (name
) && name
->p
- name
->b
>= 3
757 && name
->b
[0] == 'o' && name
->b
[1] == 'p' && name
->b
[2] == '$')
760 /* see if it's an assignment expression */
761 if (name
->p
- name
->b
>= 10 /* op$assign_ */
762 && memcmp (name
->b
+ 3, "assign_", 7) == 0)
764 for (i
= 0; i
< sizeof (optable
)/sizeof (optable
[0]); i
++)
766 int len
= name
->p
- name
->b
- 10;
767 if (strlen (optable
[i
].in
) == len
768 && memcmp (optable
[i
].in
, name
->b
+ 10, len
) == 0)
771 string_append (name
, "operator");
772 string_append (name
, optable
[i
].out
);
773 string_append (name
, "=");
780 for (i
= 0; i
< sizeof (optable
)/sizeof (optable
[0]); i
++)
782 int len
= name
->p
- name
->b
- 3;
783 if (strlen (optable
[i
].in
) == len
784 && memcmp (optable
[i
].in
, name
->b
+ 3, len
) == 0)
787 string_append (name
, "operator");
788 string_append (name
, optable
[i
].out
);
795 else if (!string_empty (name
) && name
->p
- name
->b
>= 5
796 && memcmp (name
->b
, "type$", 5) == 0)
798 /* type conversion operator */
800 const char *tem
= name
->b
+ 5;
801 if (do_type (&tem
, &type
))
804 string_append (name
, "operator ");
805 string_appends (name
, &type
);
806 string_delete (&type
);
812 /* a mini string-handling package */
823 s
->p
= s
->b
= (char *) xmalloc (n
);
826 else if (s
->e
- s
->p
< n
)
828 int tem
= s
->p
- s
->b
;
831 s
->b
= (char *) xrealloc (s
->b
, n
);
844 s
->b
= s
->e
= s
->p
= NULL
;
852 s
->b
= s
->p
= s
->e
= NULL
;
875 if (s
== NULL
|| *s
== '\0')
884 string_appends (p
, s
)
892 memcpy (p
->p
, s
->b
, n
);
897 string_appendn (p
, s
, n
)
910 string_prepend (p
, s
)
914 if (s
== NULL
|| *s
== '\0')
916 string_prependn (p
, s
, strlen (s
));
920 string_prependn (p
, s
, n
)
930 for (q
= p
->p
- 1; q
>= p
->b
; q
--)
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