gcc/gengtype.h

/* Process source files and output type information.
   Copyright (C) 2002, 2003, 2004, 2007, 2008 Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 3, or (at your option) any later
version.

GCC is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  */

#ifndef GCC_GENGTYPE_H
#define GCC_GENGTYPE_H

/* A file position, mostly for error messages.  
   The FILE element may be compared using pointer equality.  */
struct fileloc {
  const char *file;
  int line;
};

/* Data types handed around within, but opaque to, the lexer and parser.  */
typedef struct pair *pair_p;
typedef struct type *type_p;
typedef const struct type *const_type_p;
typedef struct options *options_p;

/* Variables used to communicate between the lexer and the parser.  */
extern int lexer_toplevel_done;
extern struct fileloc lexer_line;

/* Print an error message.  */
extern void error_at_line 
  (struct fileloc *pos, const char *msg, ...) ATTRIBUTE_PRINTF_2;

/* Like asprintf, but calls fatal() on out of memory.  */
extern char *xasprintf(const char *, ...) ATTRIBUTE_PRINTF_1;

/* Constructor routines for types.  */
extern void do_typedef (const char *s, type_p t, struct fileloc *pos);
extern void do_scalar_typedef (const char *s, struct fileloc *pos);
extern type_p resolve_typedef (const char *s, struct fileloc *pos);
extern type_p new_structure (const char *name, int isunion,
			     struct fileloc *pos, pair_p fields,
			     options_p o);
extern type_p find_structure (const char *s, int isunion);
extern type_p create_scalar_type (const char *name);
extern type_p create_pointer (type_p t);
extern type_p create_array (type_p t, const char *len);
extern options_p create_option (options_p, const char *name, const void *info);
extern options_p create_nested_ptr_option (options_p, type_p t,
					   const char *from, const char *to);
extern pair_p create_field_at (pair_p next, type_p type, const char *name,
			       options_p opt, struct fileloc *pos);
extern pair_p nreverse_pairs (pair_p list);
extern type_p adjust_field_type (type_p, options_p);
extern void note_variable (const char *s, type_p t, options_p o,
			   struct fileloc *pos);
extern void note_def_vec (const char *type_name, bool is_scalar,
			  struct fileloc *pos);
extern void note_def_vec_alloc (const char *type, const char *astrat,
				struct fileloc *pos);

/* Lexer and parser routines.  */
extern int yylex (const char **yylval);
extern void yybegin (const char *fname);
extern void yyend (void);
extern void parse_file (const char *name);
extern bool hit_error;

/* Token codes.  */
enum {
  EOF_TOKEN = 0,

  /* Per standard convention, codes in the range (0, UCHAR_MAX]
     represent single characters with those character codes.  */

  CHAR_TOKEN_OFFSET = UCHAR_MAX + 1,
  GTY_TOKEN = CHAR_TOKEN_OFFSET,
  TYPEDEF,
  EXTERN,
  STATIC,
  UNION,
  STRUCT,
  ENUM,
  VEC_TOKEN,
  DEFVEC_OP,
  DEFVEC_I,
  DEFVEC_ALLOC,
  ELLIPSIS,
  PTR_ALIAS,
  NESTED_PTR,
  PARAM_IS,
  NUM,
  SCALAR,
  ID,
  STRING,
  CHAR,
  ARRAY,

  /* print_token assumes that any token >= FIRST_TOKEN_WITH_VALUE may have
     a meaningful value to be printed.  */
  FIRST_TOKEN_WITH_VALUE = PARAM_IS
};
#endif