libiberty/cp-demangle.h

   1 /* Internal demangler interface for g++ V3 ABI.
   2    Copyright (C) 2003-2021 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 provides some definitions shared by cp-demangle.c and
  32    cp-demint.c.  It should not be included by any other files.  */
  33
  34 /* Information we keep for operators.  */
  35
  36 struct demangle_operator_info
  37 {
  38   /* Mangled name.  */
  39   const char *code;
  40   /* Real name.  */
  41   const char *name;
  42   /* Length of real name.  */
  43   int len;
  44   /* Number of arguments.  */
  45   int args;
  46 };
  47
  48 /* How to print the value of a builtin type.  */
  49
  50 enum d_builtin_type_print
  51 {
  52   /* Print as (type)val.  */
  53   D_PRINT_DEFAULT,
  54   /* Print as integer.  */
  55   D_PRINT_INT,
  56   /* Print as unsigned integer, with trailing "u".  */
  57   D_PRINT_UNSIGNED,
  58   /* Print as long, with trailing "l".  */
  59   D_PRINT_LONG,
  60   /* Print as unsigned long, with trailing "ul".  */
  61   D_PRINT_UNSIGNED_LONG,
  62   /* Print as long long, with trailing "ll".  */
  63   D_PRINT_LONG_LONG,
  64   /* Print as unsigned long long, with trailing "ull".  */
  65   D_PRINT_UNSIGNED_LONG_LONG,
  66   /* Print as bool.  */
  67   D_PRINT_BOOL,
  68   /* Print as float--put value in square brackets.  */
  69   D_PRINT_FLOAT,
  70   /* Print in usual way, but here to detect void.  */
  71   D_PRINT_VOID
  72 };
  73
  74 /* Information we keep for a builtin type.  */
  75
  76 struct demangle_builtin_type_info
  77 {
  78   /* Type name.  */
  79   const char *name;
  80   /* Length of type name.  */
  81   int len;
  82   /* Type name when using Java.  */
  83   const char *java_name;
  84   /* Length of java name.  */
  85   int java_len;
  86   /* How to print a value of this type.  */
  87   enum d_builtin_type_print print;
  88 };
  89
  90 /* The information structure we pass around.  */
  91
  92 struct d_info
  93 {
  94   /* The string we are demangling.  */
  95   const char *s;
  96   /* The end of the string we are demangling.  */
  97   const char *send;
  98   /* The options passed to the demangler.  */
  99   int options;
 100   /* The next character in the string to consider.  */
 101   const char *n;
 102   /* The array of components.  */
 103   struct demangle_component *comps;
 104   /* The index of the next available component.  */
 105   int next_comp;
 106   /* The number of available component structures.  */
 107   int num_comps;
 108   /* The array of substitutions.  */
 109   struct demangle_component **subs;
 110   /* The index of the next substitution.  */
 111   int next_sub;
 112   /* The number of available entries in the subs array.  */
 113   int num_subs;
 114   /* The last name we saw, for constructors and destructors.  */
 115   struct demangle_component *last_name;
 116   /* A running total of the length of large expansions from the
 117      mangled name to the demangled name, such as standard
 118      substitutions and builtin types.  */
 119   int expansion;
 120   /* Non-zero if we are parsing an expression.  */
 121   int is_expression;
 122   /* Non-zero if we are parsing the type operand of a conversion
 123      operator, but not when in an expression.  */
 124   int is_conversion;
 125   /*  1: using new unresolved-name grammar.
 126      -1: using new unresolved-name grammar and saw an unresolved-name.
 127       0: using old unresolved-name grammar.  */
 128   int unresolved_name_state;
 129   /* If DMGL_NO_RECURSE_LIMIT is not active then this is set to
 130      the current recursion level.  */
 131   unsigned int recursion_level;
 132 };
 133
 134 /* To avoid running past the ending '\0', don't:
 135    - call d_peek_next_char if d_peek_char returned '\0'
 136    - call d_advance with an 'i' that is too large
 137    - call d_check_char(di, '\0')
 138    Everything else is safe.  */
 139 #define d_peek_char(di) (*((di)->n))
 140 #ifndef CHECK_DEMANGLER
 141 #  define d_peek_next_char(di) ((di)->n[1])
 142 #  define d_advance(di, i) ((di)->n += (i))
 143 #endif
 144 #define d_check_char(di, c) (d_peek_char(di) == c ? ((di)->n++, 1) : 0)
 145 #define d_next_char(di) (d_peek_char(di) == '\0' ? '\0' : *((di)->n++))
 146 #define d_str(di) ((di)->n)
 147
 148 #ifdef CHECK_DEMANGLER
 149 static inline char
 150 d_peek_next_char (const struct d_info *di)
 151 {
 152   if (!di->n[0])
 153     abort ();
 154   return di->n[1];
 155 }
 156
 157 static inline void
 158 d_advance (struct d_info *di, int i)
 159 {
 160   if (i < 0)
 161     abort ();
 162   while (i--)
 163     {
 164       if (!di->n[0])
 165         abort ();
 166       di->n++;
 167     }
 168 }
 169 #endif
 170
 171 /* Functions and arrays in cp-demangle.c which are referenced by
 172    functions in cp-demint.c.  */
 173 #ifdef IN_GLIBCPP_V3
 174 #define CP_STATIC_IF_GLIBCPP_V3 static
 175 #else
 176 #define CP_STATIC_IF_GLIBCPP_V3 extern
 177 #endif
 178
 179 #ifndef IN_GLIBCPP_V3
 180 extern const struct demangle_operator_info cplus_demangle_operators[];
 181 #endif
 182
 183 #define D_BUILTIN_TYPE_COUNT (34)
 184
 185 CP_STATIC_IF_GLIBCPP_V3
 186 const struct demangle_builtin_type_info
 187 cplus_demangle_builtin_types[D_BUILTIN_TYPE_COUNT];
 188
 189 CP_STATIC_IF_GLIBCPP_V3
 190 struct demangle_component *
 191 cplus_demangle_mangled_name (struct d_info *, int);
 192
 193 CP_STATIC_IF_GLIBCPP_V3
 194 struct demangle_component *
 195 cplus_demangle_type (struct d_info *);
 196
 197 extern void
 198 cplus_demangle_init_info (const char *, int, size_t, struct d_info *);
 199
 200 /* cp-demangle.c needs to define this a little differently */
 201 #undef CP_STATIC_IF_GLIBCPP_V3