libiberty/cp-demint.c

   1 /* Demangler component interface functions.
   2    Copyright (C) 2004-2021 Free Software Foundation, Inc.
   3    Written by Ian Lance Taylor <ian@wasabisystems.com>.
   4
   5    This file is part of the libiberty library, which is part of GCC.
   6
   7    This file is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 2 of the License, or
  10    (at your option) any later version.
  11
  12    In addition to the permissions in the GNU General Public License, the
  13    Free Software Foundation gives you unlimited permission to link the
  14    compiled version of this file into combinations with other programs,
  15    and to distribute those combinations without any restriction coming
  16    from the use of this file.  (The General Public License restrictions
  17    do apply in other respects; for example, they cover modification of
  18    the file, and distribution when not linked into a combined
  19    executable.)
  20
  21    This program is distributed in the hope that it will be useful,
  22    but WITHOUT ANY WARRANTY; without even the implied warranty of
  23    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  24    GNU General Public License for more details.
  25
  26    You should have received a copy of the GNU General Public License
  27    along with this program; if not, write to the Free Software
  28    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.
  29 */
  30
  31 /* This file implements a few interface functions which are provided
  32    for use with struct demangle_component trees.  These functions are
  33    declared in demangle.h.  These functions are closely tied to the
  34    demangler code in cp-demangle.c, and other interface functions can
  35    be found in that file.  We put these functions in a separate file
  36    because they are not needed by the demangler, and so we avoid
  37    having them pulled in by programs which only need the
  38    demangler.  */
  39
  40 #ifdef HAVE_CONFIG_H
  41 #include "config.h"
  42 #endif
  43
  44 #ifdef HAVE_STDLIB_H
  45 #include <stdlib.h>
  46 #endif
  47 #ifdef HAVE_STRING_H
  48 #include <string.h>
  49 #endif
  50
  51 #include "ansidecl.h"
  52 #include "libiberty.h"
  53 #include "demangle.h"
  54 #include "cp-demangle.h"
  55
  56 /* Fill in most component types.  */
  57
  58 int
  59 cplus_demangle_fill_component (struct demangle_component *p,
  60                                enum demangle_component_type type,
  61                                struct demangle_component *left,
  62                                 struct demangle_component *right)
  63 {
  64   if (p == NULL)
  65     return 0;
  66   switch (type)
  67     {
  68     case DEMANGLE_COMPONENT_QUAL_NAME:
  69     case DEMANGLE_COMPONENT_LOCAL_NAME:
  70     case DEMANGLE_COMPONENT_TYPED_NAME:
  71     case DEMANGLE_COMPONENT_TEMPLATE:
  72     case DEMANGLE_COMPONENT_CONSTRUCTION_VTABLE:
  73     case DEMANGLE_COMPONENT_VENDOR_TYPE_QUAL:
  74     case DEMANGLE_COMPONENT_FUNCTION_TYPE:
  75     case DEMANGLE_COMPONENT_ARRAY_TYPE:
  76     case DEMANGLE_COMPONENT_PTRMEM_TYPE:
  77     case DEMANGLE_COMPONENT_ARGLIST:
  78     case DEMANGLE_COMPONENT_TEMPLATE_ARGLIST:
  79     case DEMANGLE_COMPONENT_UNARY:
  80     case DEMANGLE_COMPONENT_BINARY:
  81     case DEMANGLE_COMPONENT_BINARY_ARGS:
  82     case DEMANGLE_COMPONENT_TRINARY:
  83     case DEMANGLE_COMPONENT_TRINARY_ARG1:
  84     case DEMANGLE_COMPONENT_TRINARY_ARG2:
  85     case DEMANGLE_COMPONENT_LITERAL:
  86     case DEMANGLE_COMPONENT_LITERAL_NEG:
  87       break;
  88
  89       /* These component types only have one subtree.  */
  90     case DEMANGLE_COMPONENT_VTABLE:
  91     case DEMANGLE_COMPONENT_VTT:
  92     case DEMANGLE_COMPONENT_TYPEINFO:
  93     case DEMANGLE_COMPONENT_TYPEINFO_NAME:
  94     case DEMANGLE_COMPONENT_TYPEINFO_FN:
  95     case DEMANGLE_COMPONENT_THUNK:
  96     case DEMANGLE_COMPONENT_VIRTUAL_THUNK:
  97     case DEMANGLE_COMPONENT_COVARIANT_THUNK:
  98     case DEMANGLE_COMPONENT_JAVA_CLASS:
  99     case DEMANGLE_COMPONENT_GUARD:
 100     case DEMANGLE_COMPONENT_REFTEMP:
 101     case DEMANGLE_COMPONENT_RESTRICT:
 102     case DEMANGLE_COMPONENT_VOLATILE:
 103     case DEMANGLE_COMPONENT_CONST:
 104     case DEMANGLE_COMPONENT_RESTRICT_THIS:
 105     case DEMANGLE_COMPONENT_VOLATILE_THIS:
 106     case DEMANGLE_COMPONENT_CONST_THIS:
 107     case DEMANGLE_COMPONENT_POINTER:
 108     case DEMANGLE_COMPONENT_REFERENCE:
 109     case DEMANGLE_COMPONENT_RVALUE_REFERENCE:
 110     case DEMANGLE_COMPONENT_COMPLEX:
 111     case DEMANGLE_COMPONENT_IMAGINARY:
 112     case DEMANGLE_COMPONENT_VENDOR_TYPE:
 113     case DEMANGLE_COMPONENT_CAST:
 114     case DEMANGLE_COMPONENT_CONVERSION:
 115       if (right != NULL)
 116         return 0;
 117       break;
 118
 119     default:
 120       /* Other types do not use subtrees.  */
 121       return 0;
 122     }
 123
 124   p->type = type;
 125   p->u.s_binary.left = left;
 126   p->u.s_binary.right = right;
 127   p->d_printing = 0;
 128   p->d_counting = 0;
 129
 130   return 1;
 131 }
 132
 133 /* Fill in a DEMANGLE_COMPONENT_BUILTIN_TYPE.  */
 134
 135 int
 136 cplus_demangle_fill_builtin_type (struct demangle_component *p,
 137                                   const char *type_name)
 138 {
 139   int len;
 140   unsigned int i;
 141
 142   if (p == NULL || type_name == NULL)
 143     return 0;
 144   len = strlen (type_name);
 145   for (i = 0; i < D_BUILTIN_TYPE_COUNT; ++i)
 146     {
 147       if (len == cplus_demangle_builtin_types[i].len
 148           && strcmp (type_name, cplus_demangle_builtin_types[i].name) == 0)
 149         {
 150           p->type = DEMANGLE_COMPONENT_BUILTIN_TYPE;
 151           p->u.s_builtin.type = &cplus_demangle_builtin_types[i];
 152           p->d_printing = 0;
 153           p->d_counting = 0;
 154           return 1;
 155         }
 156     }
 157   return 0;
 158 }
 159
 160 /* Fill in a DEMANGLE_COMPONENT_OPERATOR.  */
 161
 162 int
 163 cplus_demangle_fill_operator (struct demangle_component *p,
 164                               const char *opname, int args)
 165 {
 166   int len;
 167   unsigned int i;
 168
 169   if (p == NULL || opname == NULL)
 170     return 0;
 171   len = strlen (opname);
 172   for (i = 0; cplus_demangle_operators[i].name != NULL; ++i)
 173     {
 174       if (len == cplus_demangle_operators[i].len
 175           && args == cplus_demangle_operators[i].args
 176           && strcmp (opname, cplus_demangle_operators[i].name) == 0)
 177         {
 178           p->type = DEMANGLE_COMPONENT_OPERATOR;
 179           p->u.s_operator.op = &cplus_demangle_operators[i];
 180           p->d_printing = 0;
 181           p->d_counting = 0;
 182           return 1;
 183         }
 184     }
 185   return 0;
 186 }
 187
 188 /* Translate a mangled name into components.  */
 189
 190 struct demangle_component *
 191 cplus_demangle_v3_components (const char *mangled, int options, void **mem)
 192 {
 193   size_t len;
 194   int type;
 195   struct d_info di;
 196   struct demangle_component *dc;
 197
 198   len = strlen (mangled);
 199
 200   if (mangled[0] == '_' && mangled[1] == 'Z')
 201     type = 0;
 202   else
 203     {
 204       if ((options & DMGL_TYPES) == 0)
 205         return NULL;
 206       type = 1;
 207     }
 208
 209   cplus_demangle_init_info (mangled, options, len, &di);
 210
 211   di.comps = ((struct demangle_component *)
 212               malloc (di.num_comps * sizeof (struct demangle_component)));
 213   di.subs = ((struct demangle_component **)
 214              malloc (di.num_subs * sizeof (struct demangle_component *)));
 215   if (di.comps == NULL || di.subs == NULL)
 216     {
 217       free (di.comps);
 218       free (di.subs);
 219       return NULL;
 220     }
 221
 222   if (! type)
 223     dc = cplus_demangle_mangled_name (&di, 1);
 224   else
 225     dc = cplus_demangle_type (&di);
 226
 227   /* If DMGL_PARAMS is set, then if we didn't consume the entire
 228      mangled string, then we didn't successfully demangle it.  */
 229   if ((options & DMGL_PARAMS) != 0 && d_peek_char (&di) != '\0')
 230     dc = NULL;
 231
 232   free (di.subs);
 233
 234   if (dc != NULL)
 235     *mem = di.comps;
 236   else
 237     free (di.comps);
 238
 239   return dc;
 240 }