gcc/gengtype.h

   1 /* Process source files and output type information.
   2    Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING.  If not, write to the Free
  18 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19 02111-1307, USA.  */
  20
  21 /* A file position, mostly for error messages.
  22    The FILE element may be compared using pointer equality.  */
  23 struct fileloc {
  24   const char *file;
  25   int line;
  26 };
  27
  28 /* Kinds of types we can understand.  */
  29 enum typekind {
  30   TYPE_SCALAR,
  31   TYPE_STRING,
  32   TYPE_STRUCT,
  33   TYPE_UNION,
  34   TYPE_POINTER,
  35   TYPE_ARRAY,
  36   TYPE_LANG_STRUCT,
  37   TYPE_PARAM_STRUCT
  38 };
  39
  40 typedef struct pair *pair_p;
  41 typedef struct type *type_p;
  42 typedef unsigned lang_bitmap;
  43
  44 /* Option data for the 'nested_ptr' option.  */
  45 struct nested_ptr_data {
  46   type_p type;
  47   const char *convert_to;
  48   const char *convert_from;
  49 };
  50
  51 /* A way to pass data through to the output end.  */
  52 typedef struct options {
  53   struct options *next;
  54   const char *name;
  55   const char *info;
  56 } *options_p;
  57
  58 /* A name and a type.  */
  59 struct pair {
  60   pair_p next;
  61   const char *name;
  62   type_p type;
  63   struct fileloc line;
  64   options_p opt;
  65 };
  66
  67 #define NUM_PARAM 10
  68
  69 /* A description of a type.  */
  70 enum gc_used_enum
  71   {
  72     GC_UNUSED = 0,
  73     GC_USED,
  74     GC_MAYBE_POINTED_TO,
  75     GC_POINTED_TO
  76   };
  77
  78 struct type {
  79   enum typekind kind;
  80   type_p next;
  81   type_p pointer_to;
  82   enum gc_used_enum gc_used;
  83   union {
  84     type_p p;
  85     struct {
  86       const char *tag;
  87       struct fileloc line;
  88       pair_p fields;
  89       options_p opt;
  90       lang_bitmap bitmap;
  91       type_p lang_struct;
  92     } s;
  93     char *sc;
  94     struct {
  95       type_p p;
  96       const char *len;
  97     } a;
  98     struct {
  99       type_p stru;
 100       type_p param[NUM_PARAM];
 101       struct fileloc line;
 102     } param_struct;
 103   } u;
 104 };
 105
 106 #define UNION_P(x)                                      \
 107  ((x)->kind == TYPE_UNION ||                            \
 108   ((x)->kind == TYPE_LANG_STRUCT                        \
 109    && (x)->u.s.lang_struct->kind == TYPE_UNION))
 110 #define UNION_OR_STRUCT_P(x)                    \
 111  ((x)->kind == TYPE_UNION                       \
 112   || (x)->kind == TYPE_STRUCT                   \
 113   || (x)->kind == TYPE_LANG_STRUCT)
 114
 115 /* The one and only TYPE_STRING.  */
 116 extern struct type string_type;
 117
 118 /* Variables used to communicate between the lexer and the parser.  */
 119 extern int lexer_toplevel_done;
 120 extern struct fileloc lexer_line;
 121
 122 /* Print an error message.  */
 123 extern void error_at_line
 124   (struct fileloc *pos, const char *msg, ...) ATTRIBUTE_PRINTF_2;
 125
 126 /* Combines xmalloc() and vasprintf().  */
 127 extern int xvasprintf (char **, const char *, va_list)
 128      ATTRIBUTE_PRINTF (2, 0);
 129 /* Like the above, but more convenient for quick coding.  */
 130 extern char * xasprintf (const char *, ...)
 131      ATTRIBUTE_PRINTF_1;
 132
 133 /* Constructor routines for types.  */
 134 extern void do_typedef (const char *s, type_p t, struct fileloc *pos);
 135 extern type_p resolve_typedef (const char *s, struct fileloc *pos);
 136 extern void new_structure (const char *name, int isunion,
 137                            struct fileloc *pos, pair_p fields,
 138                            options_p o);
 139 extern type_p find_structure (const char *s, int isunion);
 140 extern type_p create_scalar_type (const char *name, size_t name_len);
 141 extern type_p create_pointer (type_p t);
 142 extern type_p create_array (type_p t, const char *len);
 143 extern options_p create_option (const char *name, void *info);
 144 extern type_p adjust_field_type (type_p, options_p);
 145 extern void note_variable (const char *s, type_p t, options_p o,
 146                            struct fileloc *pos);
 147 extern void note_yacc_type (options_p o, pair_p fields,
 148                             pair_p typeinfo, struct fileloc *pos);
 149
 150 /* Lexer and parser routines, most automatically generated.  */
 151 extern int yylex (void);
 152 extern void yyerror (const char *);
 153 extern int yyparse (void);
 154 extern void parse_file (const char *name);
 155
 156 /* Output file handling.  */
 157
 158 /* Structure representing an output file.  */
 159 struct outf
 160 {
 161   struct outf *next;
 162   const char *name;
 163   size_t buflength;
 164   size_t bufused;
 165   char *buf;
 166 };
 167
 168 typedef struct outf * outf_p;
 169
 170 /* An output file, suitable for definitions, that can see declarations
 171    made in INPUT_FILE and is linked into every language that uses
 172    INPUT_FILE.  */
 173 extern outf_p get_output_file_with_visibility
 174    (const char *input_file);
 175 const char *get_output_file_name (const char *);
 176
 177 /* A list of output files suitable for definitions.  There is one
 178    BASE_FILES entry for each language.  */
 179 extern outf_p base_files[];
 180
 181 /* A bitmap that specifies which of BASE_FILES should be used to
 182    output a definition that is different for each language and must be
 183    defined once in each language that uses INPUT_FILE.  */
 184 extern lang_bitmap get_base_file_bitmap (const char *input_file);
 185
 186 /* Print, like fprintf, to O.  */
 187 extern void oprintf (outf_p o, const char *S, ...)
 188      ATTRIBUTE_PRINTF_2;