/* Definitions for c-common.c.
   Copyright (C) 1987, 93, 94, 95, 97, 98, 1999 Free Software Foundation, Inc.

This file is part of GNU CC.

GNU CC 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 2, or (at your option)
any later version.

GNU CC 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 GNU CC; see the file COPYING.  If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Standard named or nameless data types of the C compiler.  */

enum c_tree_index
{
    CTI_WCHAR_TYPE,
    CTI_SIGNED_WCHAR_TYPE,
    CTI_UNSIGNED_WCHAR_TYPE,
    CTI_WIDEST_INT_LIT_TYPE,
    CTI_WIDEST_UINT_LIT_TYPE,

    CTI_CHAR_ARRAY_TYPE,
    CTI_WCHAR_ARRAY_TYPE,
    CTI_INT_ARRAY_TYPE,
    CTI_STRING_TYPE,
    CTI_CONST_STRING_TYPE,

    CTI_BOOLEAN_TYPE,
    CTI_BOOLEAN_TRUE,
    CTI_BOOLEAN_FALSE,
    CTI_DEFAULT_FUNCTION_TYPE,
    CTI_VOID_LIST,

    CTI_VOID_FTYPE,
    CTI_VOID_FTYPE_PTR,
    CTI_INT_FTYPE_INT,
    CTI_PTR_FTYPE_SIZETYPE,
    
    CTI_MAX
};

extern tree c_global_trees[CTI_MAX];

#define wchar_type_node			c_global_trees[CTI_WCHAR_TYPE]
#define signed_wchar_type_node		c_global_trees[CTI_SIGNED_WCHAR_TYPE]
#define unsigned_wchar_type_node	c_global_trees[CTI_UNSIGNED_WCHAR_TYPE]
#define widest_integer_literal_type_node c_global_trees[CTI_WIDEST_INT_LIT_TYPE]
#define widest_unsigned_literal_type_node c_global_trees[CTI_WIDEST_UINT_LIT_TYPE]

#define boolean_type_node		c_global_trees[CTI_BOOLEAN_TYPE]
#define boolean_true_node		c_global_trees[CTI_BOOLEAN_TRUE]
#define boolean_false_node		c_global_trees[CTI_BOOLEAN_FALSE]

#define char_array_type_node		c_global_trees[CTI_CHAR_ARRAY_TYPE]
#define wchar_array_type_node		c_global_trees[CTI_WCHAR_ARRAY_TYPE]
#define int_array_type_node		c_global_trees[CTI_INT_ARRAY_TYPE]
#define string_type_node		c_global_trees[CTI_STRING_TYPE]
#define const_string_type_node		c_global_trees[CTI_CONST_STRING_TYPE]

#define default_function_type		c_global_trees[CTI_DEFAULT_FUNCTION_TYPE]
#define void_list_node			c_global_trees[CTI_VOID_LIST]
#define void_ftype			c_global_trees[CTI_VOID_FTYPE]
#define void_ftype_ptr			c_global_trees[CTI_VOID_FTYPE_PTR]
#define int_ftype_int			c_global_trees[CTI_INT_FTYPE_INT]
#define ptr_ftype_sizetype		c_global_trees[CTI_PTR_FTYPE_SIZETYPE]

extern void declare_function_name		PROTO((void));
extern void decl_attributes			PROTO((tree, tree, tree));
extern void init_function_format_info		PROTO((void));
extern void check_function_format		PROTO((tree, tree, tree));
extern void c_apply_type_quals_to_decl		PROTO((int, tree));
extern int c_get_alias_set			PROTO((tree));
/* Print an error message for invalid operands to arith operation CODE.
   NOP_EXPR is used as a special case (see truthvalue_conversion).  */
extern void binary_op_error			PROTO((enum tree_code));
extern void c_expand_expr_stmt			PROTO((tree));
extern void c_expand_start_cond			PROTO((tree, int, int));
extern void c_expand_start_else			PROTO((void));
extern void c_expand_end_cond			PROTO((void));
/* Validate the expression after `case' and apply default promotions.  */
extern tree check_case_value			PROTO((tree));
/* Concatenate a list of STRING_CST nodes into one STRING_CST.  */
extern tree combine_strings			PROTO((tree));
extern void constant_expression_warning		PROTO((tree));
extern tree convert_and_check			PROTO((tree, tree));
extern void overflow_warning			PROTO((tree));
extern void unsigned_conversion_warning		PROTO((tree, tree));
/* Read the rest of the current #-directive line.  */
#if USE_CPPLIB
extern char *get_directive_line			PROTO((void));
#define GET_DIRECTIVE_LINE() get_directive_line ()
#else
extern char *get_directive_line			PROTO((FILE *));
#define GET_DIRECTIVE_LINE() get_directive_line (finput)
#endif

/* Subroutine of build_binary_op, used for comparison operations.
   See if the operands have both been converted from subword integer types
   and, if so, perhaps change them both back to their original type.  */
extern tree shorten_compare			PROTO((tree *, tree *, tree *, enum tree_code *));
/* Prepare expr to be an argument of a TRUTH_NOT_EXPR,
   or validate its data type for an `if' or `while' statement or ?..: exp. */
extern tree truthvalue_conversion		PROTO((tree));
extern tree type_for_mode			PROTO((enum machine_mode, int));
extern tree type_for_size			PROTO((unsigned, int));

/* Build tree nodes and builtin functions common to both C and C++ language
   frontends.  */
extern void c_common_nodes_and_builtins		PROTO((int, int, int));

extern tree build_va_arg			PROTO((tree, tree));

extern tree initializer_constant_valid_p	PROTO((tree, tree));

/* Nonzero if the type T promotes to itself.
   ANSI C states explicitly the list of types that promote;
   in particular, short promotes to int even if they have the same width.  */
#define C_PROMOTING_INTEGER_TYPE_P(t)				\
  (TREE_CODE ((t)) == INTEGER_TYPE				\
   && (TYPE_MAIN_VARIANT (t) == char_type_node			\
       || TYPE_MAIN_VARIANT (t) == signed_char_type_node	\
       || TYPE_MAIN_VARIANT (t) == unsigned_char_type_node	\
       || TYPE_MAIN_VARIANT (t) == short_integer_type_node	\
       || TYPE_MAIN_VARIANT (t) == short_unsigned_type_node))

extern int self_promoting_args_p		PROTO((tree));
extern tree simple_type_promotes_to		PROTO((tree));