Standardize header guards.

[thirdparty/gcc.git] / gcc / cpplib.h

/* Definitions for CPP library.
   Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001
   Free Software Foundation, Inc.
   Written by Per Bothner, 1994-95.

This program 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.

This program 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 this program; if not, write to the Free Software
Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

 In other words, you are welcome to use, share and improve this program.
 You are forbidden to forbid anyone else to use, share and improve
 what you give them.   Help stamp out software-hoarding!  */
#ifndef GCC_CPPLIB_H
#define GCC_CPPLIB_H

#include <sys/types.h>
#include "hashtable.h"

#ifdef __cplusplus
extern "C" {
#endif

/* For complex reasons, cpp_reader is also typedefed in c-pragma.h.  */
#ifndef GCC_C_PRAGMA_H
typedef struct cpp_reader cpp_reader;
#endif
typedef struct cpp_buffer cpp_buffer;
typedef struct cpp_options cpp_options;
typedef struct cpp_token cpp_token;
typedef struct cpp_string cpp_string;
typedef struct cpp_hashnode cpp_hashnode;
typedef struct cpp_macro cpp_macro;
typedef struct cpp_lexer_pos cpp_lexer_pos;
typedef struct cpp_lookahead cpp_lookahead;
typedef struct cpp_callbacks cpp_callbacks;

struct answer;
struct file_name_map_list;
struct ht;

/* The first two groups, apart from '=', can appear in preprocessor
   expressions.  This allows a lookup table to be implemented in
   _cpp_parse_expr.

   The first group, to CPP_LAST_EQ, can be immediately followed by an
   '='.  The lexer needs operators ending in '=', like ">>=", to be in
   the same order as their counterparts without the '=', like ">>".  */

/* Positions in the table.  */
#define CPP_LAST_EQ CPP_MAX
#define CPP_FIRST_DIGRAPH CPP_HASH
#define CPP_LAST_PUNCTUATOR CPP_DOT_STAR

#define TTYPE_TABLE				\
  OP(CPP_EQ = 0,	"=")			\
  OP(CPP_NOT,		"!")			\
  OP(CPP_GREATER,	">")	/* compare */	\
  OP(CPP_LESS,		"<")			\
  OP(CPP_PLUS,		"+")	/* math */	\
  OP(CPP_MINUS,		"-")			\
  OP(CPP_MULT,		"*")			\
  OP(CPP_DIV,		"/")			\
  OP(CPP_MOD,		"%")			\
  OP(CPP_AND,		"&")	/* bit ops */	\
  OP(CPP_OR,		"|")			\
  OP(CPP_XOR,		"^")			\
  OP(CPP_RSHIFT,	">>")			\
  OP(CPP_LSHIFT,	"<<")			\
  OP(CPP_MIN,		"<?")	/* extension */	\
  OP(CPP_MAX,		">?")			\
\
  OP(CPP_COMPL,		"~")			\
  OP(CPP_AND_AND,	"&&")	/* logical */	\
  OP(CPP_OR_OR,		"||")			\
  OP(CPP_QUERY,		"?")			\
  OP(CPP_COLON,		":")			\
  OP(CPP_COMMA,		",")	/* grouping */	\
  OP(CPP_OPEN_PAREN,	"(")			\
  OP(CPP_CLOSE_PAREN,	")")			\
  OP(CPP_EQ_EQ,		"==")	/* compare */	\
  OP(CPP_NOT_EQ,	"!=")			\
  OP(CPP_GREATER_EQ,	">=")			\
  OP(CPP_LESS_EQ,	"<=")			\
\
  OP(CPP_PLUS_EQ,	"+=")	/* math */	\
  OP(CPP_MINUS_EQ,	"-=")			\
  OP(CPP_MULT_EQ,	"*=")			\
  OP(CPP_DIV_EQ,	"/=")			\
  OP(CPP_MOD_EQ,	"%=")			\
  OP(CPP_AND_EQ,	"&=")	/* bit ops */	\
  OP(CPP_OR_EQ,		"|=")			\
  OP(CPP_XOR_EQ,	"^=")			\
  OP(CPP_RSHIFT_EQ,	">>=")			\
  OP(CPP_LSHIFT_EQ,	"<<=")			\
  OP(CPP_MIN_EQ,	"<?=")	/* extension */	\
  OP(CPP_MAX_EQ,	">?=")			\
  /* Digraphs together, beginning with CPP_FIRST_DIGRAPH.  */	\
  OP(CPP_HASH,		"#")	/* digraphs */	\
  OP(CPP_PASTE,		"##")			\
  OP(CPP_OPEN_SQUARE,	"[")			\
  OP(CPP_CLOSE_SQUARE,	"]")			\
  OP(CPP_OPEN_BRACE,	"{")			\
  OP(CPP_CLOSE_BRACE,	"}")			\
  /* The remainder of the punctuation.  Order is not significant.  */	\
  OP(CPP_SEMICOLON,	";")	/* structure */	\
  OP(CPP_ELLIPSIS,	"...")			\
  OP(CPP_PLUS_PLUS,	"++")	/* increment */	\
  OP(CPP_MINUS_MINUS,	"--")			\
  OP(CPP_DEREF,		"->")	/* accessors */	\
  OP(CPP_DOT,		".")			\
  OP(CPP_SCOPE,		"::")			\
  OP(CPP_DEREF_STAR,	"->*")			\
  OP(CPP_DOT_STAR,	".*")			\
  OP(CPP_ATSIGN,	"@")  /* used in Objective C */ \
\
  TK(CPP_NAME,		SPELL_IDENT)	/* word */			\
  TK(CPP_INT,		SPELL_STRING)	/* 23 */			\
  TK(CPP_FLOAT,		SPELL_STRING)	/* 3.14159 */			\
  TK(CPP_NUMBER,	SPELL_STRING)	/* 34_be+ta  */			\
\
  TK(CPP_CHAR,		SPELL_STRING)	/* 'char' */			\
  TK(CPP_WCHAR,		SPELL_STRING)	/* L'char' */			\
  TK(CPP_OTHER,		SPELL_CHAR)	/* stray punctuation */		\
\
  TK(CPP_STRING,	SPELL_STRING)	/* "string" */			\
  TK(CPP_WSTRING,	SPELL_STRING)	/* L"string" */			\
  TK(CPP_HEADER_NAME,	SPELL_STRING)	/* <stdio.h> in #include */	\
\
  TK(CPP_COMMENT,	SPELL_STRING)	/* Only if output comments.  */ \
  TK(CPP_MACRO_ARG,	SPELL_NONE)	/* Macro argument.  */		\
  OP(CPP_EOF,		"EOL")		/* End of line or file.  */

#define OP(e, s) e,
#define TK(e, s) e,
enum cpp_ttype
{
  TTYPE_TABLE
  N_TTYPES
};
#undef OP
#undef TK

/* C language kind, used when calling cpp_reader_init.  */
enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
	     CLK_GNUCXX, CLK_CXX98, CLK_OBJC, CLK_OBJCXX, CLK_ASM};

/* Payload of a NUMBER, FLOAT, STRING, or COMMENT token.  */
struct cpp_string
{
  unsigned int len;
  const unsigned char *text;
};

/* Flags for the cpp_token structure.  */
#define PREV_WHITE	(1 << 0) /* If whitespace before this token.  */
#define DIGRAPH		(1 << 1) /* If it was a digraph.  */
#define STRINGIFY_ARG	(1 << 2) /* If macro argument to be stringified.  */
#define PASTE_LEFT	(1 << 3) /* If on LHS of a ## operator.  */
#define NAMED_OP	(1 << 4) /* C++ named operators.  */
#define NO_EXPAND	(1 << 5) /* Do not macro-expand this token.  */
#define AVOID_LPASTE	(1 << 6) /* Check left for accidental pastes.  */

/* A preprocessing token.  This has been carefully packed and should
   occupy 12 bytes on 32-bit hosts and 16 bytes on 64-bit hosts.  */
struct cpp_token
{
  ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT;  /* token type */
  unsigned char flags;		/* flags - see above */

  union
  {
    cpp_hashnode *node;		/* An identifier.  */
    struct cpp_string str;	/* A string, or number.  */
    unsigned int arg_no;	/* Argument no. for a CPP_MACRO_ARG.  */
    unsigned char c;		/* Character represented by CPP_OTHER.  */
  } val;
};

/* The position of a token in the current file.  */
struct cpp_lexer_pos
{
  unsigned int line;
  unsigned int output_line;
  unsigned short col;
};

typedef struct cpp_token_with_pos cpp_token_with_pos;
struct cpp_token_with_pos
{
  cpp_token token;
  cpp_lexer_pos pos;
};

/* Token lookahead.  */
struct cpp_lookahead
{
  struct cpp_lookahead *next;
  cpp_token_with_pos *tokens;
  cpp_lexer_pos pos;
  unsigned int cur, count, cap;
};

/* A standalone character.  We may want to make it unsigned for the
   same reason we use unsigned char - to avoid signedness issues.  */
typedef int cppchar_t;

/* Values for opts.dump_macros.
  dump_only means inhibit output of the preprocessed text
             and instead output the definitions of all user-defined
             macros in a form suitable for use as input to cpp.
   dump_names means pass #define and the macro name through to output.
   dump_definitions means pass the whole definition (plus #define) through
*/
enum { dump_none = 0, dump_only, dump_names, dump_definitions };

/* This structure is nested inside struct cpp_reader, and
   carries all the options visible to the command line.  */
struct cpp_options
{
  /* Name of input and output files.  */
  const char *in_fname;
  const char *out_fname;

  /* Characters between tab stops.  */
  unsigned int tabstop;

  /* Pending options - -D, -U, -A, -I, -ixxx. */
  struct cpp_pending *pending;

  /* File name which deps are being written to.  This is 0 if deps are
     being written to stdout.  */
  const char *deps_file;

  /* Search paths for include files.  */
  struct search_path *quote_include;	/* "" */
  struct search_path *bracket_include;  /* <> */

  /* Map between header names and file names, used only on DOS where
     file names are limited in length.  */
  struct file_name_map_list *map_list;

  /* Directory prefix that should replace `/usr/lib/gcc-lib/TARGET/VERSION'
     in the standard include file directories.  */
  const char *include_prefix;
  unsigned int include_prefix_len;

  /* -fleading_underscore sets this to "_".  */
  const char *user_label_prefix;

  /* The language we're preprocessing.  */
  enum c_lang lang;

  /* Non-0 means -v, so print the full set of include dirs.  */
  unsigned char verbose;

  /* Nonzero means use extra default include directories for C++.  */
  unsigned char cplusplus;

  /* Nonzero means handle cplusplus style comments */
  unsigned char cplusplus_comments;

  /* Nonzero means handle #import, for objective C.  */
  unsigned char objc;

  /* Nonzero means don't copy comments into the output file.  */
  unsigned char discard_comments;

  /* Nonzero means process the ISO trigraph sequences.  */
  unsigned char trigraphs;

  /* Nonzero means process the ISO digraph sequences.  */
  unsigned char digraphs;

  /* Nonzero means to allow hexadecimal floats and LL suffixes.  */
  unsigned char extended_numbers;

  /* Nonzero means print the names of included files rather than the
     preprocessed output.  1 means just the #include "...", 2 means
     #include <...> as well.  */
  unsigned char print_deps;

  /* Nonzero if phony targets are created for each header.  */
  unsigned char deps_phony_targets;

  /* Nonzero if missing .h files in -M output are assumed to be
     generated files and not errors.  */
  unsigned char print_deps_missing_files;

  /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
  unsigned char print_deps_append;

  /* Nonzero means print names of header files (-H).  */
  unsigned char print_include_names;

  /* Nonzero means cpp_pedwarn causes a hard error.  */
  unsigned char pedantic_errors;

  /* Nonzero means don't print warning messages.  */
  unsigned char inhibit_warnings;

  /* Nonzero means don't suppress warnings from system headers.  */
  unsigned char warn_system_headers;

  /* Nonzero means don't print error messages.  Has no option to
     select it, but can be set by a user of cpplib (e.g. fix-header).  */
  unsigned char inhibit_errors;

  /* Nonzero means warn if slash-star appears in a comment.  */
  unsigned char warn_comments;

  /* Nonzero means warn if there are any trigraphs.  */
  unsigned char warn_trigraphs;

  /* Nonzero means warn if #import is used.  */
  unsigned char warn_import;

  /* Nonzero means warn about various incompatibilities with
     traditional C.  */
  unsigned char warn_traditional;

  /* Nonzero means turn warnings into errors.  */
  unsigned char warnings_are_errors;

  /* Nonzero causes output not to be done, but directives such as
     #define that have side effects are still obeyed.  */
  unsigned char no_output;

  /* Nonzero means we should look for header.gcc files that remap file
     names.  */
  unsigned char remap;

  /* Nonzero means don't output line number information.  */
  unsigned char no_line_commands;

  /* Nonzero means -I- has been seen, so don't look for #include "foo"
     the source-file directory.  */
  unsigned char ignore_srcdir;

  /* Zero means dollar signs are punctuation. */
  unsigned char dollars_in_ident;

  /* Nonzero means warn if undefined identifiers are evaluated in an #if.  */
  unsigned char warn_undef;

  /* Nonzero for the 1999 C Standard, including corrigenda and amendments.  */
  unsigned char c99;

  /* Nonzero means give all the error messages the ANSI standard requires.  */
  unsigned char pedantic;

  /* Nonzero means we're looking at already preprocessed code, so don't
     bother trying to do macro expansion and whatnot.  */
  unsigned char preprocessed;

  /* Nonzero disables all the standard directories for headers.  */
  unsigned char no_standard_includes;

  /* Nonzero disables the C++-specific standard directories for headers.  */
  unsigned char no_standard_cplusplus_includes;

  /* Nonzero means dump macros in some fashion - see above.  */
  unsigned char dump_macros;

  /* Nonzero means pass #include lines through to the output.  */
  unsigned char dump_includes;

  /* Print column number in error messages.  */
  unsigned char show_column;

  /* Treat C++ alternate operator names special.  */
  unsigned char operator_names;

  /* True if --help, --version or --target-help appeared in the
     options.  Stand-alone CPP should then bail out after option
     parsing; drivers might want to continue printing help.  */
  unsigned char help_only;
};

/* This structure is passed to the call back when changing file.  */
enum cpp_fc_reason {FC_ENTER = 0, FC_LEAVE, FC_RENAME};

struct cpp_file_loc
{
  const char *filename;
  unsigned int lineno;
};

typedef struct cpp_file_change cpp_file_change;
struct cpp_file_change
{
  struct cpp_file_loc from;	/* Line of #include or #line.  */
  struct cpp_file_loc to;	/* Line after #include or #line, or start.  */
  enum cpp_fc_reason reason;	/* Reason for change.  */
  unsigned char sysp;		/* Nonzero if system header.  */
  unsigned char externc;	/* Nonzero if wrapper needed.  */
};

/* Call backs.  */
struct cpp_callbacks
{
    void (*file_change) PARAMS ((cpp_reader *, const cpp_file_change *));
    void (*include) PARAMS ((cpp_reader *, const unsigned char *,
			     const cpp_token *));
    void (*define) PARAMS ((cpp_reader *, cpp_hashnode *));
    void (*undef) PARAMS ((cpp_reader *, cpp_hashnode *));
    void (*poison) PARAMS ((cpp_reader *));
    void (*ident) PARAMS ((cpp_reader *, const cpp_string *));
    void (*def_pragma) PARAMS ((cpp_reader *));
};

#define CPP_FATAL_LIMIT 1000
/* True if we have seen a "fatal" error. */
#define CPP_FATAL_ERRORS(PFILE) (cpp_errors (PFILE) >= CPP_FATAL_LIMIT)

/* Name under which this program was invoked.  */
extern const char *progname;

/* Where does this buffer come from?  A faked include, a source file,
   a builtin macro, a command-line option, or a _Pragma operator.  */
enum cpp_buffer_type {BUF_FAKE, BUF_FILE, BUF_BUILTIN,
		      BUF_CL_OPTION, BUF_PRAGMA};

/* The structure of a node in the hash table.  The hash table has
   entries for all identifiers: either macros defined by #define
   commands (type NT_MACRO), assertions created with #assert
   (NT_ASSERTION), or neither of the above (NT_VOID).  Builtin macros
   like __LINE__ are flagged NODE_BUILTIN.  Poisioned identifiers are
   flagged NODE_POISONED.  NODE_OPERATOR (C++ only) indicates an
   identifier that behaves like an operator such as "xor".
   NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
   diagnostic may be required for this node.  Currently this only
   applies to __VA_ARGS__ and poisoned identifiers.  */

/* Hash node flags.  */
#define NODE_OPERATOR	(1 << 0)	/* C++ named operator.  */
#define NODE_POISONED	(1 << 1)	/* Poisoned identifier.  */
#define NODE_BUILTIN	(1 << 2)	/* Builtin macro.  */
#define NODE_DIAGNOSTIC (1 << 3)	/* Possible diagnostic when lexed.  */
#define NODE_WARN	(1 << 4)	/* Warn if redefined or undefined.  */

/* Different flavors of hash node.  */
enum node_type
{
  NT_VOID = 0,	   /* No definition yet.  */
  NT_MACRO,	   /* A macro of some form.  */
  NT_ASSERTION	   /* Predicate for #assert.  */
};

/* Different flavors of builtin macro.  */
enum builtin_type
{
  BT_SPECLINE = 0,		/* `__LINE__' */
  BT_DATE,			/* `__DATE__' */
  BT_FILE,			/* `__FILE__' */
  BT_BASE_FILE,			/* `__BASE_FILE__' */
  BT_INCLUDE_LEVEL,		/* `__INCLUDE_LEVEL__' */
  BT_TIME,			/* `__TIME__' */
  BT_STDC			/* `__STDC__' */
};

#define CPP_HASHNODE(HNODE)	((cpp_hashnode *) (HNODE))
#define HT_NODE(NODE)		((ht_identifier *) (NODE))
#define NODE_LEN(NODE)		HT_LEN (&(NODE)->ident)
#define NODE_NAME(NODE)		HT_STR (&(NODE)->ident)

/* The common part of an identifier node shared amongst all 3 C front
   ends.  Also used to store CPP identifiers, which are a superset of
   identifiers in the grammatical sense.  */
struct cpp_hashnode
{
  struct ht_identifier ident;
  unsigned short arg_index;		/* Macro argument index.  */
  unsigned char directive_index;	/* Index into directive table.  */
  unsigned char rid_code;		/* Rid code - for front ends.  */
  ENUM_BITFIELD(node_type) type : 8;	/* CPP node type.  */
  unsigned char flags;			/* CPP flags.  */

  union
  {
    cpp_macro *macro;			/* If a macro.  */
    struct answer *answers;		/* Answers to an assertion.  */
    enum cpp_ttype operator;		/* Code for a named operator.  */
    enum builtin_type builtin;		/* Code for a builtin macro.  */
  } value;
};

/* Call this first to get a handle to pass to other functions.  If you
   want cpplib to manage its own hashtable, pass in a NULL pointer.
   Or you can pass in an initialised hash table that cpplib will use;
   this technique is used by the C front ends.  */
extern cpp_reader *cpp_create_reader PARAMS ((struct ht *,
					      enum c_lang));

/* Call this to release the handle.  Any use of the handle after this
   function returns is invalid.  Returns cpp_errors (pfile).  */
extern int cpp_destroy PARAMS ((cpp_reader *));

/* Call these to get pointers to the options and callback structures
   for a given reader.  These pointers are good until you call
   cpp_finish on that reader.  You can either edit the callbacks
   through the pointer returned from cpp_get_callbacks, or set them
   with cpp_set_callbacks.  */
extern cpp_options *cpp_get_options PARAMS ((cpp_reader *));
extern cpp_callbacks *cpp_get_callbacks PARAMS ((cpp_reader *));
extern void cpp_set_callbacks PARAMS ((cpp_reader *, cpp_callbacks *));

/* Now call cpp_handle_option[s] to handle 1[or more] switches.  The
   return value is the number of arguments used.  If
   cpp_handle_options returns without using all arguments, it couldn't
   understand the next switch.  When there are no switches left, you
   must call cpp_post_options before calling cpp_start_read.  Only
   after cpp_post_options are the contents of the cpp_options
   structure reliable.  */
extern int cpp_handle_options PARAMS ((cpp_reader *, int, char **));
extern int cpp_handle_option PARAMS ((cpp_reader *, int, char **));
extern void cpp_post_options PARAMS ((cpp_reader *));

/* Error count.  */
extern unsigned int cpp_errors PARAMS ((cpp_reader *));

extern unsigned int cpp_token_len PARAMS ((const cpp_token *));
extern unsigned char *cpp_token_as_text PARAMS ((cpp_reader *,
						 const cpp_token *));
extern unsigned char *cpp_spell_token PARAMS ((cpp_reader *, const cpp_token *,
					       unsigned char *));
extern void cpp_register_pragma PARAMS ((cpp_reader *,
					 const char *, const char *,
					 void (*) PARAMS ((cpp_reader *))));
extern void cpp_register_pragma_space PARAMS ((cpp_reader *, const char *));

extern int cpp_start_read PARAMS ((cpp_reader *, const char *));
extern void cpp_finish PARAMS ((cpp_reader *));
extern int cpp_avoid_paste PARAMS ((cpp_reader *, const cpp_token *,
				    const cpp_token *));
extern enum cpp_ttype cpp_can_paste PARAMS ((cpp_reader *, const cpp_token *,
					     const cpp_token *, int *));
extern void cpp_get_token PARAMS ((cpp_reader *, cpp_token *));
extern const cpp_lexer_pos *cpp_get_line PARAMS ((cpp_reader *));
extern const unsigned char *cpp_macro_definition PARAMS ((cpp_reader *,
						  const cpp_hashnode *));

/* Evaluate a CPP_CHAR or CPP_WCHAR token.  */
extern HOST_WIDE_INT
cpp_interpret_charconst PARAMS ((cpp_reader *, const cpp_token *,
				 int, int, unsigned int *));

extern void cpp_define PARAMS ((cpp_reader *, const char *));
extern void cpp_assert PARAMS ((cpp_reader *, const char *));
extern void cpp_undef  PARAMS ((cpp_reader *, const char *));
extern void cpp_unassert PARAMS ((cpp_reader *, const char *));

extern cpp_buffer *cpp_push_buffer PARAMS ((cpp_reader *,
					    const unsigned char *, size_t,
					    enum cpp_buffer_type,
					    const char *));
extern cpp_buffer *cpp_pop_buffer PARAMS ((cpp_reader *));
extern int cpp_defined PARAMS ((cpp_reader *, const unsigned char *, int));

/* N.B. The error-message-printer prototypes have not been nicely
   formatted because exgettext needs to see 'msgid' on the same line
   as the name of the function in order to work properly.  Only the
   string argument gets a name in an effort to keep the lines from
   getting ridiculously oversized.  */

extern void cpp_ice PARAMS ((cpp_reader *, const char *msgid, ...))
  ATTRIBUTE_PRINTF_2;
extern void cpp_fatal PARAMS ((cpp_reader *, const char *msgid, ...))
  ATTRIBUTE_PRINTF_2;
extern void cpp_error PARAMS ((cpp_reader *, const char *msgid, ...))
  ATTRIBUTE_PRINTF_2;
extern void cpp_warning PARAMS ((cpp_reader *, const char *msgid, ...))
  ATTRIBUTE_PRINTF_2;
extern void cpp_pedwarn PARAMS ((cpp_reader *, const char *msgid, ...))
  ATTRIBUTE_PRINTF_2;
extern void cpp_notice PARAMS ((cpp_reader *, const char *msgid, ...))
  ATTRIBUTE_PRINTF_2;
extern void cpp_error_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
  ATTRIBUTE_PRINTF_4;
extern void cpp_warning_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
  ATTRIBUTE_PRINTF_4;
extern void cpp_pedwarn_with_line PARAMS ((cpp_reader *, int, int, const char *msgid, ...))
  ATTRIBUTE_PRINTF_4;
extern void cpp_pedwarn_with_file_and_line PARAMS ((cpp_reader *, const char *, int, int, const char *msgid, ...))
  ATTRIBUTE_PRINTF_5;
extern void cpp_error_from_errno PARAMS ((cpp_reader *, const char *));
extern void cpp_notice_from_errno PARAMS ((cpp_reader *, const char *));

/* In cpplex.c */
extern int cpp_ideq			PARAMS ((const cpp_token *,
						 const char *));
extern void cpp_output_line		PARAMS ((cpp_reader *, FILE *));
extern void cpp_output_token		PARAMS ((const cpp_token *, FILE *));
extern const char *cpp_type2name	PARAMS ((enum cpp_ttype));
extern unsigned int cpp_parse_escape	PARAMS ((cpp_reader *,
						 const unsigned char **,
						 const unsigned char *,
						 unsigned HOST_WIDE_INT, int));

/* In cpphash.c */

/* Lookup an identifier in the hashtable.  Puts the identifier in the
   table if it is not already there.  */
extern cpp_hashnode *cpp_lookup		PARAMS ((cpp_reader *,
						 const unsigned char *,
						 unsigned int));

typedef int (*cpp_cb) PARAMS ((cpp_reader *, cpp_hashnode *, void *));
extern void cpp_forall_identifiers	PARAMS ((cpp_reader *,
						 cpp_cb, void *));

/* In cppmacro.c */
extern void cpp_scan_buffer_nooutput	PARAMS ((cpp_reader *, int));
extern void cpp_start_lookahead		PARAMS ((cpp_reader *));
extern void cpp_stop_lookahead		PARAMS ((cpp_reader *, int));
extern int  cpp_sys_macro_p		PARAMS ((cpp_reader *));

/* In cppfiles.c */
extern int cpp_included	PARAMS ((cpp_reader *, const char *));
extern void cpp_make_system_header PARAMS ((cpp_reader *, int, int));

#ifdef __cplusplus
}
#endif

#endif /* ! GCC_CPPLIB_H */