1 /* Demangler for GNU C++
2 Copyright (C) 1989 Free Software Foundation, Inc.
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 1, 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 /* #define nounderscore 1 /* define this is names don't start with _ */
52 /* #include "misc.h" */
57 #define memcpy(s1, s2, n) strncpy(s1, s2, n)
58 #define memcmp(s1, s2, n) strncmp(s1, s2, n)
59 #define strchr(s, c) index(s, c)
67 extern char *cplus_demangle (const char *type);
69 extern char *cplus_demangle ();
72 static char **typevec = 0;
73 static int ntypes = 0;
74 static int typevec_size = 0;
91 "convert", "+", /* unary + */
92 "negate", "-", /* unary - */
98 "postincrement", "++",
99 "postdecrement", "--",
110 "method_call", "->()",
111 "addr", "&", /* unary & */
113 "nop", "", /* for operator= */
116 /* Beware: these aren't '\0' terminated. */
119 char *b; /* pointer to start of string */
120 char *p; /* pointer after last character */
121 char *e; /* pointer after end of allocated space */
125 static void string_need (string *s, int n);
126 static void string_delete (string *s);
127 static void string_init (string *s);
128 static void string_clear (string *s);
129 static int string_empty (string *s);
130 static void string_append (string *p, const char *s);
131 static void string_appends (string *p, string *s);
132 static void string_appendn (string *p, const char *s, int n);
133 static void string_prepend (string *p, const char *s);
135 static void string_prepends (string *p, string *s);
137 static void string_prependn (string *p, const char *s, int n);
138 static int get_count (const char **type, int *count);
139 static int do_args (const char **type, string *decl);
140 static int do_type (const char **type, string *result);
141 static int do_arg (const char **type, string *result);
142 static int do_args (const char **type, string *decl);
143 static void munge_function_name (string *name);
145 static void string_need ();
146 static void string_delete ();
147 static void string_init ();
148 static void string_clear ();
149 static int string_empty ();
150 static void string_append ();
151 static void string_appends ();
152 static void string_appendn ();
153 static void string_prepend ();
154 static void string_prepends ();
155 static void string_prependn ();
156 static int get_count ();
157 static int do_args ();
158 static int do_type ();
159 static int do_arg ();
160 static int do_args ();
161 static void munge_function_name ();
165 cplus_demangle (type)
174 const char *p, *premangle;
176 if (type == NULL || *type == '\0')
183 while (*p != '\0' && !(*p == '_' && p[1] == '_'))
188 if (type[0] == '_' && type[1] == '$' && type[2] == '_')
190 unsigned int l = (strlen (type) - 3)*2 + 3 + 2 + 1;
191 char *tem = (char *) zalloc (l);
192 strcpy (tem, type + 3);
194 strcat (tem, type + 3);
198 /* static data member */
199 if (*type != '_' && (p = (char *) strchr (type, '$')) != NULL)
201 int n = strlen (type) + 2;
202 char *tem = (char *) xmalloc (n);
203 memcpy (tem, type, p - type);
204 strcpy (tem + (p - type), "::");
205 strcpy (tem + (p - type) + 2, p + 1);
209 if (type[0] == '_' && type[1] == 'v' && type[2] == 't' && type[3] == '$')
211 int n = strlen (type + 4) + 14 + 1;
212 char *tem = (char *) xmalloc (n);
213 strcpy (tem, type + 4);
214 strcat (tem, " virtual table");
226 string_delete (&decl);
233 string_appendn (&decl, type, p - type);
234 munge_function_name (&decl);
242 /* a const member function */
245 string_delete (&decl);
268 while (isdigit (*p));
271 string_delete (&decl);
276 string_appendn (&decl, p, n);
277 string_append (&decl, "::");
278 string_appendn (&decl, p, n);
282 string_prepend (&decl, "::");
283 string_prependn (&decl, p, n);
290 success = do_args (&p, &decl);
292 string_append (&decl, " const");
296 success = do_args (&p, &decl);
300 for (i = 0; i < ntypes; i++)
301 if (typevec[i] != NULL)
306 free ((char *)typevec);
313 string_appendn (&decl, "", 1);
318 string_delete (&decl);
324 get_count (type, count)
328 if (!isdigit (**type))
330 *count = **type - '0';
332 /* see flush_repeats in cplus-method.c */
333 if (isdigit (**type))
335 const char *p = *type;
343 while (isdigit (*p));
353 /* result will be initialised here; it will be freed on failure */
356 do_type (type, result)
365 const char *remembered_type;
368 string_init (result);
372 while (success && !done)
379 string_prepend (&decl, "*");
384 string_prepend (&decl, "&");
389 if (!get_count (type, &n) || n >= ntypes)
393 remembered_type = typevec[n];
394 type = &remembered_type;
400 if (!string_empty (&decl) && decl.b[0] == '*')
402 string_prepend (&decl, "(");
403 string_append (&decl, ")");
405 if (!do_args (type, &decl) || **type != '_')
417 member = **type == 'M';
419 if (!isdigit (**type))
431 while (isdigit (**type));
432 if (strlen (*type) < n)
437 string_append (&decl, ")");
438 string_prepend (&decl, "::");
439 string_prependn (&decl, *type, n);
440 string_prepend (&decl, "(");
454 if (*(*type)++ != 'F')
460 if ((member && !do_args (type, &decl)) || **type != '_')
469 string_append (&decl, " ");
472 string_append (&decl, "const");
477 string_append (&decl, " ");
480 string_append (&decl, "volatilep");
486 if ((*type)[1] == 'P')
489 if (!string_empty (&decl))
490 string_prepend (&decl, " ");
491 string_prepend (&decl, "const");
504 while (success && !done)
511 string_append (result, " ");
514 string_append (result, "const");
519 string_append (result, " ");
522 string_append (result, "unsigned");
527 string_append (result, " ");
530 string_append (result, "volatile");
547 string_append (result, " ");
548 string_append (result, "void");
553 string_append (result, " ");
554 string_append (result, "long");
559 string_append (result, " ");
560 string_append (result, "int");
565 string_append (result, " ");
566 string_append (result, "short");
571 string_append (result, " ");
572 string_append (result, "char");
577 string_append (result, " ");
578 string_append (result, "long double");
583 string_append (result, " ");
584 string_append (result, "double");
589 string_append (result, " ");
590 string_append (result, "float");
594 if (!isdigit (**type))
617 while (isdigit (**type));
618 if (strlen (*type) < n)
624 string_append (result, " ");
625 string_appendn (result, *type, n);
635 if (!string_empty (&decl))
637 string_append (result, " ");
638 string_appends (result, &decl);
640 string_delete (&decl);
645 string_delete (&decl);
646 string_delete (result);
651 /* `result' will be initialised in do_type; it will be freed on failure */
654 do_arg (type, result)
664 if (!do_type (type, result))
667 if (ntypes >= typevec_size)
669 if (typevec_size == 0)
672 typevec = (char **) xmalloc (sizeof (char*)*typevec_size);
677 typevec = (char **) realloc ((char *)typevec, sizeof (char*)*typevec_size);
681 tem = (char *) xmalloc (len + 1);
682 memcpy (tem, start, len);
684 typevec[ntypes++] = tem;
688 /* `decl' must be already initialised, usually non-empty;
689 it won't be freed on failure */
706 string_append (decl, "(");
708 while (**type != '_' && **type != '\0' && **type != 'e' && **type != 'v')
715 if (!get_count (type, &r) || !get_count (type, &t) || t >= ntypes)
719 const char *tem = typevec[t];
721 string_append (decl, ", ");
722 if (!do_arg (&tem, &arg))
724 string_appends (decl, &arg);
725 string_delete (&arg);
732 string_append (decl, ", ");
733 if (!do_arg (type, &arg))
739 string_appends (decl, &arg);
742 string_delete (&arg);
748 else if (**type == 'e')
752 string_append (decl, ",");
753 string_append (decl, "...");
756 string_append (decl, ")");
761 munge_function_name (name)
764 if (!string_empty (name) && name->p - name->b >= 3
765 && name->b[0] == 'o' && name->b[1] == 'p' && name->b[2] == '$')
768 /* see if it's an assignment expression */
769 if (name->p - name->b >= 10 /* op$assign_ */
770 && memcmp (name->b + 3, "assign_", 7) == 0)
772 for (i = 0; i < sizeof (optable)/sizeof (optable[0]); i++)
774 int len = name->p - name->b - 10;
775 if (strlen (optable[i].in) == len
776 && memcmp (optable[i].in, name->b + 10, len) == 0)
779 string_append (name, "operator");
780 string_append (name, optable[i].out);
781 string_append (name, "=");
788 for (i = 0; i < sizeof (optable)/sizeof (optable[0]); i++)
790 int len = name->p - name->b - 3;
791 if (strlen (optable[i].in) == len
792 && memcmp (optable[i].in, name->b + 3, len) == 0)
795 string_append (name, "operator");
796 string_append (name, optable[i].out);
803 else if (!string_empty (name) && name->p - name->b >= 5
804 && memcmp (name->b, "type$", 5) == 0)
806 /* type conversion operator */
808 const char *tem = name->b + 5;
809 if (do_type (&tem, &type))
812 string_append (name, "operator ");
813 string_appends (name, &type);
814 string_delete (&type);
820 /* a mini string-handling package */
831 s->p = s->b = (char *) xmalloc (n);
834 else if (s->e - s->p < n)
836 int tem = s->p - s->b;
839 s->b = (char *) realloc (s->b, n);
852 s->b = s->e = s->p = NULL;
860 s->b = s->p = s->e = NULL;
883 if (s == NULL || *s == '\0')
892 string_appends (p, s)
900 memcpy (p->p, s->b, n);
905 string_appendn (p, s, n)
918 string_prepend (p, s)
922 if (s == NULL || *s == '\0')
924 string_prependn (p, s, strlen (s));
928 string_prependn (p, s, n)
938 for (q = p->p - 1; q >= p->b; q--)