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/* Process source files and output type information.

   Copyright (C) 2002, 2003, 2004, 2007 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/>.  */

/* A file position, mostly for error messages.

   The FILE element may be compared using pointer equality.  */

struct fileloc {

  const char *file;

  int line;

};

/* Kinds of types we can understand.  */

enum typekind {

  TYPE_SCALAR,

  TYPE_STRING,

  TYPE_STRUCT,

  TYPE_UNION,

  TYPE_POINTER,

  TYPE_ARRAY,

  TYPE_LANG_STRUCT,

  TYPE_PARAM_STRUCT

};

typedef struct pair *pair_p;

typedef struct type *type_p;

typedef unsigned lang_bitmap;

/* Option data for the 'nested_ptr' option.  */

struct nested_ptr_data {

  type_p type;

  const char *convert_to;

  const char *convert_from;

};

/* A way to pass data through to the output end.  */

typedef struct options {

  struct options *next;

  const char *name;

  const char *info;

} *options_p;

/* A name and a type.  */

struct pair {

  pair_p next;

  const char *name;

  type_p type;

  struct fileloc line;

  options_p opt;

};

#define NUM_PARAM 10

/* A description of a type.  */

enum gc_used_enum

  {

    GC_UNUSED = 0,

    GC_USED,

    GC_MAYBE_POINTED_TO,

    GC_POINTED_TO

  };

struct type {

  enum typekind kind;

  type_p next;

  type_p pointer_to;

  enum gc_used_enum gc_used;

  union {

    type_p p;

    struct {

      const char *tag;

      struct fileloc line;

      pair_p fields;

      options_p opt;

      lang_bitmap bitmap;

      type_p lang_struct;

    } s;

    char *sc;

    struct {

      type_p p;

      const char *len;

    } a;

    struct {

      type_p stru;

      type_p param[NUM_PARAM];

      struct fileloc line;

    } param_struct;

  } u;

};

#define UNION_P(x)                                      \

 ((x)->kind == TYPE_UNION ||                            \

  ((x)->kind == TYPE_LANG_STRUCT                        \

   && (x)->u.s.lang_struct->kind == TYPE_UNION))

#define UNION_OR_STRUCT_P(x)                    \

 ((x)->kind == TYPE_UNION                       \

  || (x)->kind == TYPE_STRUCT                   \

  || (x)->kind == TYPE_LANG_STRUCT)

/* The one and only TYPE_STRING.  */

extern struct type string_type;

/* 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;

/* Combines xmalloc() and vasprintf().  */

extern int xvasprintf (char **, const char *, va_list)

     ATTRIBUTE_PRINTF (2, 0);

/* Like the above, but more convenient for quick coding.  */

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 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, size_t name_len);

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 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_yacc_type (options_p o, pair_p fields,

                            pair_p typeinfo, struct fileloc *pos);

/* Lexer and parser routines, most automatically generated.  */

extern int yylex (void);

extern void yyerror (const char *);

extern int yyparse (void);

extern void parse_file (const char *name);

/* Output file handling.  */

/* Structure representing an output file.  */

struct outf

{

  struct outf *next;

  const char *name;

  size_t buflength;

  size_t bufused;

  char *buf;

};

typedef struct outf * outf_p;

/* An output file, suitable for definitions, that can see declarations

   made in INPUT_FILE and is linked into every language that uses

   INPUT_FILE.  */

extern outf_p get_output_file_with_visibility

   (const char *input_file);

const char *get_output_file_name (const char *);

/* A list of output files suitable for definitions.  There is one

   BASE_FILES entry for each language.  */

extern outf_p base_files[];

/* A bitmap that specifies which of BASE_FILES should be used to

   output a definition that is different for each language and must be

   defined once in each language that uses INPUT_FILE.  */

extern lang_bitmap get_base_file_bitmap (const char *input_file);

/* Print, like fprintf, to O.  */

extern void oprintf (outf_p o, const char *S, ...)

     ATTRIBUTE_PRINTF_2;