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

/* Part of CPP library.
   Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.

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.  */

/* This header defines all the internal data structures and functions
   that need to be visible across files.  It's called cpphash.h for
   historical reasons.  */

#ifndef __GCC_CPPHASH__
#define __GCC_CPPHASH__

struct directive;		/* These are deliberately incomplete.  */
struct htab;

/* Test if a sign is valid within a preprocessing number.  */
#define VALID_SIGN(c, prevc) \
  (((c) == '+' || (c) == '-') && \
   ((prevc) == 'e' || (prevc) == 'E' \
    || (((prevc) == 'p' || (prevc) == 'P') \
        && CPP_OPTION (pfile, extended_numbers))))

#define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
#define CPP_BUFFER(PFILE) ((PFILE)->buffer)
#define CPP_BUF_LINE(BUF) ((BUF)->lineno)
#define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base + (BUF)->col_adjust)
#define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)

/* Maximum nesting of cpp_buffers.  We use a static limit, partly for
   efficiency, and partly to limit runaway recursion.  */
#define CPP_STACK_MAX 200

/* Memory pools.  */
#define POOL_ALIGN(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
#define POOL_FRONT(p) ((p)->cur->front)
#define POOL_LIMIT(p) ((p)->cur->limit)
#define POOL_BASE(p)  ((p)->cur->base)
#define POOL_SIZE(p)  ((p)->cur->limit - (p)->cur->base)
#define POOL_ROOM(p)  ((p)->cur->limit - (p)->cur->front)
#define POOL_USED(p)  ((p)->cur->front - (p)->cur->base)
#define POOL_COMMIT(p, len) do {\
  ((p)->cur->front += POOL_ALIGN (len, (p)->align));\
  if ((p)->cur->front > (p)->cur->limit) abort ();} while (0)

typedef struct cpp_chunk cpp_chunk;
struct cpp_chunk
{
  cpp_chunk *next;
  unsigned char *front;
  unsigned char *limit;
  unsigned char *base;
};

typedef struct cpp_pool cpp_pool;
struct cpp_pool
{
  struct cpp_chunk *cur, *locked;
  unsigned char *pos;		/* Current position.  */
  unsigned int align;
  unsigned int locks;
};

/* List of directories to look for include files in. */
struct file_name_list
{
  struct file_name_list *next;
  struct file_name_list *alloc; /* for the cache of
				   current directory entries */
  char *name;
  unsigned int nlen;
  /* We use these to tell if the directory mentioned here is a duplicate
     of an earlier directory on the search path. */
  ino_t ino;
  dev_t dev;
  /* If the following is nonzero, it is a C-language system include
     directory.  */
  int sysp;
  /* Mapping of file names for this directory.
     Only used on MS-DOS and related platforms. */
  struct file_name_map *name_map;
};

/* Multiple-include optimisation.  */
enum mi_state {MI_FAILED = 0, MI_OUTSIDE};
enum mi_ind {MI_IND_NONE = 0, MI_IND_NOT};

typedef struct toklist toklist;
struct toklist
{
  cpp_token *first;
  cpp_token *limit;
};

typedef struct cpp_context cpp_context;
struct cpp_context
{
  /* Doubly-linked list.  */
  cpp_context *next, *prev;

  /* Contexts other than the base context are contiguous tokens.
     e.g. macro expansions, expanded argument tokens.  */
  struct toklist list;

  /* For a macro context, these are the macro and its arguments.  */
  cpp_macro *macro;
};

struct lexer_state
{
  /* Nonzero if first token on line is CPP_HASH.  */
  unsigned char in_directive;

  /* Nonzero if in a directive that takes angle-bracketed headers.  */
  unsigned char angled_headers;

  /* Nonzero to save comments.  Turned off if discard_comments, and in
     all directives apart from #define.  */
  unsigned char save_comments;

  /* If nonzero the next token is at the beginning of the line.  */
  unsigned char next_bol;

  /* Nonzero if we're mid-comment.  */
  unsigned char lexing_comment;

  /* Nonzero if lexing __VA_ARGS__ is valid.  */
  unsigned char va_args_ok;

  /* Nonzero if lexing poisoned identifiers is valid.  */
  unsigned char poisoned_ok;

  /* Nonzero to prevent macro expansion.  */
  unsigned char prevent_expansion;  

  /* Nonzero when parsing arguments to a function-like macro.  */
  unsigned char parsing_args;

  /* Nonzero when in a # NUMBER directive.  */
  unsigned char line_extension;
};

/* Special nodes - identifiers with predefined significance.  */
struct spec_nodes
{
  cpp_hashnode *n_L;			/* L"str" */
  cpp_hashnode *n_defined;		/* defined operator */
  cpp_hashnode *n_true;			/* C++ keyword true */
  cpp_hashnode *n_false;		/* C++ keyword false */
  cpp_hashnode *n__Pragma;		/* _Pragma operator */
  cpp_hashnode *n__STRICT_ANSI__;	/* STDC_0_IN_SYSTEM_HEADERS */
  cpp_hashnode *n__CHAR_UNSIGNED__;	/* plain char is unsigned */
  cpp_hashnode *n__VA_ARGS__;		/* C99 vararg macros */
};

struct cpp_buffer
{
  const unsigned char *cur;	 /* current position */
  const unsigned char *rlimit; /* end of valid data */
  const unsigned char *line_base; /* start of current line */
  cppchar_t read_ahead;		/* read ahead character */
  cppchar_t extra_char;		/* extra read-ahead for long tokens.  */

  struct cpp_reader *pfile;	/* Owns this buffer.  */
  struct cpp_buffer *prev;

  const unsigned char *buf;	 /* entire buffer */

  /* Filename specified with #line command.  */
  const char *nominal_fname;

  /* Actual directory of this file, used only for "" includes */
  struct file_name_list *actual_dir;

  /* Pointer into the include table.  Used for include_next and
     to record control macros. */
  struct include_file *inc;

  /* Value of if_stack at start of this file.
     Used to prohibit unmatched #endif (etc) in an include file.  */
  struct if_stack *if_stack;

  /* Token column position adjustment owing to tabs in whitespace.  */
  unsigned int col_adjust;

  /* Line number at line_base (above). */
  unsigned int lineno;

  /* Contains PREV_WHITE and/or AVOID_LPASTE.  */
  unsigned char saved_flags;

  /* Because of the way the lexer works, -Wtrigraphs can sometimes
     warn twice for the same trigraph.  This helps prevent that.  */
  const unsigned char *last_Wtrigraphs;

  /* True if we have already warned about C++ comments in this file.
     The warning happens only for C89 extended mode with -pedantic on,
     or for -Wtraditional, and only once per file (otherwise it would
     be far too noisy).  */
  unsigned char warned_cplusplus_comments;

  /* True if we don't process trigraphs and escaped newlines.  True
     for preprocessed input, command line directives, and _Pragma
     buffers.  */
  unsigned char from_stage3;

  /* Temporary storage for pfile->skipping whilst in a directive.  */
  unsigned char was_skipping;

  /* 1 = system header file, 2 = C system header file used for C++.  */
  unsigned char sysp;

  /* Nonzero means we have printed (while error reporting) a list of
     containing files that matches the current status.  */
  unsigned char include_stack_listed;

  /* Buffer type.  */
  ENUM_BITFIELD (cpp_buffer_type) type : 8;
};

/* A cpp_reader encapsulates the "state" of a pre-processor run.
   Applying cpp_get_token repeatedly yields a stream of pre-processor
   tokens.  Usually, there is only one cpp_reader object active.  */

struct cpp_reader
{
  /* Top of buffer stack.  */
  cpp_buffer *buffer;

  /* Lexer state.  */
  struct lexer_state state;

  /* The position of the last lexed token and last lexed directive.  */
  cpp_lexer_pos lexer_pos;
  cpp_lexer_pos directive_pos;

  /* Memory pools.  */
  cpp_pool ident_pool;		/* For all identifiers, and permanent
				   numbers and strings.  */
  cpp_pool macro_pool;		/* For macro definitions.  Permanent.  */
  cpp_pool argument_pool;	/* For macro arguments.  Temporary.   */

  /* Context stack.  */
  struct cpp_context base_context;
  struct cpp_context *context;

  /* If in_directive, the directive if known.  */
  const struct directive *directive;

  /* Multiple inlcude optimisation.  */
  enum mi_state mi_state;
  enum mi_ind mi_if_not_defined;
  unsigned int mi_lexed;
  const cpp_hashnode *mi_cmacro;
  const cpp_hashnode *mi_ind_cmacro;

  /* Token lookahead.  */
  struct cpp_lookahead *la_read;	/* Read from this lookahead.  */
  struct cpp_lookahead *la_write;	/* Write to this lookahead.  */
  struct cpp_lookahead *la_unused;	/* Free store.  */
  struct cpp_lookahead *la_saved;	/* Backup when entering directive.  */

  /* Error counter for exit code.  */
  unsigned int errors;

  /* Line and column where a newline was first seen in a string
     constant (multi-line strings).  */
  cpp_lexer_pos mlstring_pos;

  /* Buffer to hold macro definition string.  */
  unsigned char *macro_buffer;
  unsigned int macro_buffer_len;

  /* Current depth in #include directives that use <...>.  */
  unsigned int system_include_depth;

  /* Current depth of buffer stack.  */
  unsigned int buffer_stack_depth;

  /* Current depth in #include directives.  */
  unsigned int include_depth;

  /* Hash table of macros and assertions.  See cpphash.c.  */
  struct htab *hashtab;

  /* Tree of other included files.  See cppfiles.c.  */
  struct splay_tree_s *all_include_files;

  /* Chain of `actual directory' file_name_list entries, for ""
     inclusion.  */
  struct file_name_list *actual_dirs;

  /* Current maximum length of directory names in the search path
     for include files.  (Altered as we get more of them.)  */
  unsigned int max_include_len;

  /* Date and time tokens.  Calculated together if either is requested.  */
  cpp_token date;
  cpp_token time;

  /* Opaque handle to the dependencies of mkdeps.c.  Used by -M etc.  */
  struct deps *deps;

  /* Obstack holding all macro hash nodes.  This never shrinks.
     See cpphash.c */
  struct obstack *hash_ob;

  /* Obstack holding buffer and conditional structures.  This is a
     real stack.  See cpplib.c */
  struct obstack *buffer_ob;

  /* Pragma table - dynamic, because a library user can add to the
     list of recognized pragmas.  */
  struct pragma_entry *pragmas;

  /* Call backs.  */
  struct cpp_callbacks cb;

  /* User visible options.  */
  struct cpp_options opts;

  /* Special nodes - identifiers with predefined significance to the
     preprocessor.  */
  struct spec_nodes spec_nodes;

  /* We're printed a warning recommending against using #import.  */
  unsigned char import_warning;

  /* True after cpp_start_read completes.  Used to inhibit some
     warnings while parsing the command line.  */
  unsigned char done_initializing;

  /* True if we are skipping a failed conditional group.  */
  unsigned char skipping;

  /* Whether to print our version number.  Done this way so
     we don't get it twice for -v -version.  */
  unsigned char print_version;
};

/* Character classes.  Based on the more primitive macros in safe-ctype.h.
   If the definition of `numchar' looks odd to you, please look up the
   definition of a pp-number in the C standard [section 6.4.8 of C99].

   In the unlikely event that characters other than \r and \n enter
   the set is_vspace, the macro handle_newline() in cpplex.c must be
   updated.  */
#define _dollar_ok(x)	((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))

#define is_idchar(x)	(ISIDNUM(x) || _dollar_ok(x))
#define is_numchar(x)	ISIDNUM(x)
#define is_idstart(x)	(ISIDST(x) || _dollar_ok(x))
#define is_numstart(x)	ISDIGIT(x)
#define is_hspace(x)	ISBLANK(x)
#define is_vspace(x)	IS_VSPACE(x)
#define is_nvspace(x)	IS_NVSPACE(x)
#define is_space(x)	IS_SPACE_OR_NUL(x)

/* This table is constant if it can be initialized at compile time,
   which is the case if cpp was compiled with GCC >=2.7, or another
   compiler that supports C99.  */
#if HAVE_DESIGNATED_INITIALIZERS
extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
#else
extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
#endif

/* Macros.  */

#define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
#define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
#define CPP_IN_SYSTEM_HEADER(PFILE) \
  (CPP_BUFFER (PFILE) && CPP_BUFFER (PFILE)->sysp)
#define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
#define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)

/* Hash step.  The hash calculation is duplicated in cpp_lookup and
   parse_name.  */
#define HASHSTEP(r, c) ((r) * 67 + (c - 113));

/* In cpperror.c  */
enum error_type { WARNING = 0, PEDWARN, ERROR, FATAL, ICE };
extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
				       const char *, const cpp_lexer_pos *));

/* In cppmacro.c */
extern void _cpp_free_definition	PARAMS ((cpp_hashnode *));
extern int _cpp_create_definition	PARAMS ((cpp_reader *, cpp_hashnode *));
extern void _cpp_pop_context		PARAMS ((cpp_reader *));
extern void _cpp_free_lookaheads	PARAMS ((cpp_reader *));
extern void _cpp_release_lookahead	PARAMS ((cpp_reader *));
extern void _cpp_push_token		PARAMS ((cpp_reader *, const cpp_token *,
						 const cpp_lexer_pos *));

/* In cpphash.c */
extern void _cpp_init_hashtable		PARAMS ((cpp_reader *));
extern void _cpp_cleanup_hashtable	PARAMS ((cpp_reader *));
extern cpp_hashnode *_cpp_lookup_with_hash PARAMS ((cpp_reader*, size_t,
						    unsigned int));

/* In cppfiles.c */
extern void _cpp_fake_include		PARAMS ((cpp_reader *, const char *));
extern void _cpp_never_reread		PARAMS ((struct include_file *));
extern void _cpp_simplify_pathname	PARAMS ((char *));
extern int _cpp_read_file		PARAMS ((cpp_reader *, const char *));
extern void _cpp_execute_include	PARAMS ((cpp_reader *,
						 const cpp_token *, int, int));
extern int _cpp_compare_file_date       PARAMS ((cpp_reader *,
						 const cpp_token *));
extern void _cpp_report_missing_guards	PARAMS ((cpp_reader *));
extern void _cpp_init_includes		PARAMS ((cpp_reader *));
extern void _cpp_cleanup_includes	PARAMS ((cpp_reader *));
extern void _cpp_pop_file_buffer	PARAMS ((cpp_reader *, cpp_buffer *));

/* In cppexp.c */
extern int _cpp_parse_expr		PARAMS ((cpp_reader *));

/* In cpplex.c */
extern void _cpp_lex_token		PARAMS ((cpp_reader *, cpp_token *));
extern int _cpp_equiv_tokens		PARAMS ((const cpp_token *,
						 const cpp_token *));
extern void _cpp_init_pool		PARAMS ((cpp_pool *, unsigned int,
						  unsigned int, unsigned int));
extern void _cpp_free_pool		PARAMS ((cpp_pool *));
extern unsigned char *_cpp_pool_reserve PARAMS ((cpp_pool *, unsigned int));
extern unsigned char *_cpp_pool_alloc	PARAMS ((cpp_pool *, unsigned int));
extern unsigned char *_cpp_next_chunk	PARAMS ((cpp_pool *, unsigned int,
						 unsigned char **));
extern void _cpp_lock_pool		PARAMS ((cpp_pool *));
extern void _cpp_unlock_pool		PARAMS ((cpp_pool *));

/* In cpplib.c */
extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
extern void _cpp_define_builtin	PARAMS ((cpp_reader *, const char *));
extern void _cpp_do__Pragma	PARAMS ((cpp_reader *));
extern void _cpp_init_stacks	PARAMS ((cpp_reader *));
extern void _cpp_cleanup_stacks	PARAMS ((cpp_reader *));
extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum cpp_fc_reason,
					 const char *, unsigned int));

/* Utility routines and macros.  */
#define DSC(str) (const U_CHAR *)str, sizeof str - 1
#define xnew(T)		(T *) xmalloc (sizeof(T))
#define xcnew(T)	(T *) xcalloc (1, sizeof(T))
#define xnewvec(T, N)	(T *) xmalloc (sizeof(T) * (N))
#define xcnewvec(T, N)	(T *) xcalloc (N, sizeof(T))
#define xobnew(O, T)	(T *) obstack_alloc (O, sizeof(T))

/* These are inline functions instead of macros so we can get type
   checking.  */
typedef unsigned char U_CHAR;
#define U (const U_CHAR *)  /* Intended use: U"string" */

static inline int ustrcmp	PARAMS ((const U_CHAR *, const U_CHAR *));
static inline int ustrncmp	PARAMS ((const U_CHAR *, const U_CHAR *,
					 size_t));
static inline size_t ustrlen	PARAMS ((const U_CHAR *));
static inline U_CHAR *uxstrdup	PARAMS ((const U_CHAR *));
static inline U_CHAR *ustrchr	PARAMS ((const U_CHAR *, int));
static inline int ufputs	PARAMS ((const U_CHAR *, FILE *));

static inline int
ustrcmp (s1, s2)
     const U_CHAR *s1, *s2;
{
  return strcmp ((const char *)s1, (const char *)s2);
}

static inline int
ustrncmp (s1, s2, n)
     const U_CHAR *s1, *s2;
     size_t n;
{
  return strncmp ((const char *)s1, (const char *)s2, n);
}

static inline size_t
ustrlen (s1)
     const U_CHAR *s1;
{
  return strlen ((const char *)s1);
}

static inline U_CHAR *
uxstrdup (s1)
     const U_CHAR *s1;
{
  return (U_CHAR *) xstrdup ((const char *)s1);
}

static inline U_CHAR *
ustrchr (s1, c)
     const U_CHAR *s1;
     int c;
{
  return (U_CHAR *) strchr ((const char *)s1, c);
}

static inline int
ufputs (s, f)
     const U_CHAR *s;
     FILE *f;
{
  return fputs ((const char *)s, f);
}

#endif
Commit	Line	Data
88ae23e7	1	/* Part of CPP library.
d6d52dd6	2	Copyright (C) 1997, 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
4283012f JL	3
	4	This program is free software; you can redistribute it and/or modify it
	5	under the terms of the GNU General Public License as published by the
	6	Free Software Foundation; either version 2, or (at your option) any
	7	later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU General Public License for more details.
	13
	14	You should have received a copy of the GNU General Public License
	15	along with this program; if not, write to the Free Software
42b17236	16	Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
4283012f	17
88ae23e7 ZW	18	/* This header defines all the internal data structures and functions
	19	that need to be visible across files. It's called cpphash.h for
	20	historical reasons. */
	21
bb52fa7f ZW	22	#ifndef __GCC_CPPHASH__
	23	#define __GCC_CPPHASH__
	24
8121d2c3 NB	25	struct directive; /* These are deliberately incomplete. */
	26	struct htab;
	27
93c80368 NB	28	/* Test if a sign is valid within a preprocessing number. */
	29	#define VALID_SIGN(c, prevc) \
	30	(((c) == '+' \|\| (c) == '-') && \
	31	((prevc) == 'e' \|\| (prevc) == 'E' \
bdb05a7b NB	32	\|\| (((prevc) == 'p' \|\| (prevc) == 'P') \
bdb05a7b NB	33	&& CPP_OPTION (pfile, extended_numbers))))
93c80368	34
8121d2c3 NB	35	#define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
	36	#define CPP_BUFFER(PFILE) ((PFILE)->buffer)
	37	#define CPP_BUF_LINE(BUF) ((BUF)->lineno)
	38	#define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base + (BUF)->col_adjust)
	39	#define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
	40
	41	/* Maximum nesting of cpp_buffers. We use a static limit, partly for
	42	efficiency, and partly to limit runaway recursion. */
	43	#define CPP_STACK_MAX 200
	44
93c80368	45	/* Memory pools. */
269592a8	46	#define POOL_ALIGN(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
93c80368 NB	47	#define POOL_FRONT(p) ((p)->cur->front)
	48	#define POOL_LIMIT(p) ((p)->cur->limit)
	49	#define POOL_BASE(p) ((p)->cur->base)
	50	#define POOL_SIZE(p) ((p)->cur->limit - (p)->cur->base)
	51	#define POOL_ROOM(p) ((p)->cur->limit - (p)->cur->front)
	52	#define POOL_USED(p) ((p)->cur->front - (p)->cur->base)
269592a8 NB	53	#define POOL_COMMIT(p, len) do {\
269592a8 NB	54	((p)->cur->front += POOL_ALIGN (len, (p)->align));\
93c80368 NB	55	if ((p)->cur->front > (p)->cur->limit) abort ();} while (0)
	56
	57	typedef struct cpp_chunk cpp_chunk;
	58	struct cpp_chunk
15dad1d9	59	{
93c80368 NB	60	cpp_chunk *next;
	61	unsigned char *front;
	62	unsigned char *limit;
	63	unsigned char *base;
15dad1d9 ZW	64	};
15dad1d9 ZW	65
8121d2c3 NB	66	typedef struct cpp_pool cpp_pool;
	67	struct cpp_pool
	68	{
	69	struct cpp_chunk cur, locked;
	70	unsigned char pos; / Current position. */
	71	unsigned int align;
	72	unsigned int locks;
	73	};
	74
88ae23e7 ZW	75	/* List of directories to look for include files in. */
	76	struct file_name_list
	77	{
	78	struct file_name_list *next;
	79	struct file_name_list alloc; / for the cache of
	80	current directory entries */
	81	char *name;
	82	unsigned int nlen;
	83	/* We use these to tell if the directory mentioned here is a duplicate
	84	of an earlier directory on the search path. */
	85	ino_t ino;
	86	dev_t dev;
	87	/* If the following is nonzero, it is a C-language system include
	88	directory. */
	89	int sysp;
	90	/* Mapping of file names for this directory.
	91	Only used on MS-DOS and related platforms. */
	92	struct file_name_map *name_map;
	93	};
bfb9dc7f	94
8121d2c3 NB	95	/* Multiple-include optimisation. */
	96	enum mi_state {MI_FAILED = 0, MI_OUTSIDE};
	97	enum mi_ind {MI_IND_NONE = 0, MI_IND_NOT};
	98
	99	typedef struct toklist toklist;
	100	struct toklist
	101	{
	102	cpp_token *first;
	103	cpp_token *limit;
	104	};
	105
	106	typedef struct cpp_context cpp_context;
	107	struct cpp_context
	108	{
	109	/* Doubly-linked list. */
	110	cpp_context next, prev;
	111
	112	/* Contexts other than the base context are contiguous tokens.
	113	e.g. macro expansions, expanded argument tokens. */
	114	struct toklist list;
	115
	116	/* For a macro context, these are the macro and its arguments. */
	117	cpp_macro *macro;
	118	};
	119
	120	struct lexer_state
	121	{
	122	/* Nonzero if first token on line is CPP_HASH. */
	123	unsigned char in_directive;
	124
	125	/* Nonzero if in a directive that takes angle-bracketed headers. */
	126	unsigned char angled_headers;
	127
	128	/* Nonzero to save comments. Turned off if discard_comments, and in
	129	all directives apart from #define. */
	130	unsigned char save_comments;
	131
	132	/* If nonzero the next token is at the beginning of the line. */
	133	unsigned char next_bol;
	134
	135	/* Nonzero if we're mid-comment. */
	136	unsigned char lexing_comment;
	137
	138	/* Nonzero if lexing __VA_ARGS__ is valid. */
	139	unsigned char va_args_ok;
	140
	141	/* Nonzero if lexing poisoned identifiers is valid. */
	142	unsigned char poisoned_ok;
	143
	144	/* Nonzero to prevent macro expansion. */
	145	unsigned char prevent_expansion;
	146
	147	/* Nonzero when parsing arguments to a function-like macro. */
	148	unsigned char parsing_args;
	149
	150	/* Nonzero when in a # NUMBER directive. */
	151	unsigned char line_extension;
	152	};
	153
	154	/* Special nodes - identifiers with predefined significance. */
	155	struct spec_nodes
	156	{
	157	cpp_hashnode n_L; / L"str" */
	158	cpp_hashnode n_defined; / defined operator */
037313ae ZW	159	cpp_hashnode n_true; / C++ keyword true */
037313ae ZW	160	cpp_hashnode n_false; / C++ keyword false */
8121d2c3 NB	161	cpp_hashnode n__Pragma; / _Pragma operator */
	162	cpp_hashnode n__STRICT_ANSI__; / STDC_0_IN_SYSTEM_HEADERS */
	163	cpp_hashnode n__CHAR_UNSIGNED__; / plain char is unsigned */
	164	cpp_hashnode n__VA_ARGS__; / C99 vararg macros */
	165	};
	166
27e2564a NB	167	struct cpp_buffer
	168	{
	169	const unsigned char cur; / current position */
	170	const unsigned char rlimit; / end of valid data */
	171	const unsigned char line_base; / start of current line */
	172	cppchar_t read_ahead; /* read ahead character */
	173	cppchar_t extra_char; /* extra read-ahead for long tokens. */
	174
	175	struct cpp_reader pfile; / Owns this buffer. */
	176	struct cpp_buffer *prev;
	177
	178	const unsigned char buf; / entire buffer */
	179
	180	/* Filename specified with #line command. */
	181	const char *nominal_fname;
	182
	183	/* Actual directory of this file, used only for "" includes */
	184	struct file_name_list *actual_dir;
	185
	186	/* Pointer into the include table. Used for include_next and
	187	to record control macros. */
	188	struct include_file *inc;
	189
	190	/* Value of if_stack at start of this file.
	191	Used to prohibit unmatched #endif (etc) in an include file. */
	192	struct if_stack *if_stack;
	193
	194	/* Token column position adjustment owing to tabs in whitespace. */
	195	unsigned int col_adjust;
	196
	197	/* Line number at line_base (above). */
	198	unsigned int lineno;
	199
bd969772 NB	200	/* Contains PREV_WHITE and/or AVOID_LPASTE. */
	201	unsigned char saved_flags;
	202
27e2564a NB	203	/* Because of the way the lexer works, -Wtrigraphs can sometimes
	204	warn twice for the same trigraph. This helps prevent that. */
	205	const unsigned char *last_Wtrigraphs;
	206
	207	/* True if we have already warned about C++ comments in this file.
	208	The warning happens only for C89 extended mode with -pedantic on,
	209	or for -Wtraditional, and only once per file (otherwise it would
	210	be far too noisy). */
	211	unsigned char warned_cplusplus_comments;
	212
	213	/* True if we don't process trigraphs and escaped newlines. True
	214	for preprocessed input, command line directives, and _Pragma
	215	buffers. */
	216	unsigned char from_stage3;
	217
	218	/* Temporary storage for pfile->skipping whilst in a directive. */
	219	unsigned char was_skipping;
642ce434 NB	220
	221	/* 1 = system header file, 2 = C system header file used for C++. */
	222	unsigned char sysp;
0bda4760 NB	223
	224	/* Nonzero means we have printed (while error reporting) a list of
	225	containing files that matches the current status. */
	226	unsigned char include_stack_listed;
	227
	228	/* Buffer type. */
	229	ENUM_BITFIELD (cpp_buffer_type) type : 8;
27e2564a NB	230	};
27e2564a NB	231
8121d2c3 NB	232	/* A cpp_reader encapsulates the "state" of a pre-processor run.
	233	Applying cpp_get_token repeatedly yields a stream of pre-processor
	234	tokens. Usually, there is only one cpp_reader object active. */
	235
	236	struct cpp_reader
	237	{
	238	/* Top of buffer stack. */
	239	cpp_buffer *buffer;
	240
	241	/* Lexer state. */
	242	struct lexer_state state;
	243
	244	/* The position of the last lexed token and last lexed directive. */
	245	cpp_lexer_pos lexer_pos;
	246	cpp_lexer_pos directive_pos;
	247
	248	/* Memory pools. */
	249	cpp_pool ident_pool; /* For all identifiers, and permanent
	250	numbers and strings. */
	251	cpp_pool macro_pool; /* For macro definitions. Permanent. */
	252	cpp_pool argument_pool; /* For macro arguments. Temporary. */
	253
	254	/* Context stack. */
	255	struct cpp_context base_context;
	256	struct cpp_context *context;
	257
	258	/* If in_directive, the directive if known. */
	259	const struct directive *directive;
	260
	261	/* Multiple inlcude optimisation. */
	262	enum mi_state mi_state;
	263	enum mi_ind mi_if_not_defined;
	264	unsigned int mi_lexed;
	265	const cpp_hashnode *mi_cmacro;
	266	const cpp_hashnode *mi_ind_cmacro;
	267
	268	/* Token lookahead. */
	269	struct cpp_lookahead la_read; / Read from this lookahead. */
	270	struct cpp_lookahead la_write; / Write to this lookahead. */
	271	struct cpp_lookahead la_unused; / Free store. */
	272	struct cpp_lookahead la_saved; / Backup when entering directive. */
	273
	274	/* Error counter for exit code. */
	275	unsigned int errors;
	276
	277	/* Line and column where a newline was first seen in a string
	278	constant (multi-line strings). */
	279	cpp_lexer_pos mlstring_pos;
	280
	281	/* Buffer to hold macro definition string. */
	282	unsigned char *macro_buffer;
	283	unsigned int macro_buffer_len;
	284
	285	/* Current depth in #include directives that use <...>. */
	286	unsigned int system_include_depth;
	287
	288	/* Current depth of buffer stack. */
	289	unsigned int buffer_stack_depth;
	290
	291	/* Current depth in #include directives. */
	292	unsigned int include_depth;
	293
	294	/* Hash table of macros and assertions. See cpphash.c. */
	295	struct htab *hashtab;
296
297	/* Tree of other included files. See cppfiles.c. */
298	struct splay_tree_s *all_include_files;
299
300	/* Chain of `actual directory' file_name_list entries, for ""
301	inclusion. */
302	struct file_name_list *actual_dirs;
303
304	/* Current maximum length of directory names in the search path
305	for include files. (Altered as we get more of them.) */
306	unsigned int max_include_len;
307
308	/* Date and time tokens. Calculated together if either is requested. */
309	cpp_token date;
310	cpp_token time;
311
312	/* Opaque handle to the dependencies of mkdeps.c. Used by -M etc. */
313	struct deps *deps;
314
315	/* Obstack holding all macro hash nodes. This never shrinks.
316	See cpphash.c */
317	struct obstack *hash_ob;
318
319	/* Obstack holding buffer and conditional structures. This is a
320	real stack. See cpplib.c */
321	struct obstack *buffer_ob;
322
323	/* Pragma table - dynamic, because a library user can add to the
324	list of recognized pragmas. */
325	struct pragma_entry *pragmas;
326
327	/* Call backs. */
328	struct cpp_callbacks cb;
329
330	/* User visible options. */
331	struct cpp_options opts;
332
333	/* Special nodes - identifiers with predefined significance to the
334	preprocessor. */
335	struct spec_nodes spec_nodes;
336
337	/* We're printed a warning recommending against using #import. */
338	unsigned char import_warning;
339
340	/* True after cpp_start_read completes. Used to inhibit some
341	warnings while parsing the command line. */
342	unsigned char done_initializing;
343
344	/* True if we are skipping a failed conditional group. */
345	unsigned char skipping;
cb773845 ZW	346
	347	/* Whether to print our version number. Done this way so
	348	we don't get it twice for -v -version. */
	349	unsigned char print_version;
8121d2c3 NB	350	};
8121d2c3 NB	351
f6bbde28	352	/* Character classes. Based on the more primitive macros in safe-ctype.h.
88ae23e7	353	If the definition of `numchar' looks odd to you, please look up the
91fcd158 NB	354	definition of a pp-number in the C standard [section 6.4.8 of C99].
	355
	356	In the unlikely event that characters other than \r and \n enter
	357	the set is_vspace, the macro handle_newline() in cpplex.c must be
	358	updated. */
ae79697b	359	#define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
88ae23e7	360
f6bbde28 ZW	361	#define is_idchar(x) (ISIDNUM(x) \|\| _dollar_ok(x))
	362	#define is_numchar(x) ISIDNUM(x)
	363	#define is_idstart(x) (ISIDST(x) \|\| _dollar_ok(x))
	364	#define is_numstart(x) ISDIGIT(x)
	365	#define is_hspace(x) ISBLANK(x)
	366	#define is_vspace(x) IS_VSPACE(x)
	367	#define is_nvspace(x) IS_NVSPACE(x)
	368	#define is_space(x) IS_SPACE_OR_NUL(x)
88ae23e7	369
f6bbde28	370	/* This table is constant if it can be initialized at compile time,
88ae23e7 ZW	371	which is the case if cpp was compiled with GCC >=2.7, or another
88ae23e7 ZW	372	compiler that supports C99. */
61d0346d	373	#if HAVE_DESIGNATED_INITIALIZERS
61d0346d	374	extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
88ae23e7	375	#else
61d0346d	376	extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
88ae23e7 ZW	377	#endif
	378
	379	/* Macros. */
	380
88ae23e7	381	#define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
ae79697b	382	#define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
bfb9dc7f	383	#define CPP_IN_SYSTEM_HEADER(PFILE) \
642ce434	384	(CPP_BUFFER (PFILE) && CPP_BUFFER (PFILE)->sysp)
28e0f040 NB	385	#define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
28e0f040 NB	386	#define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
88ae23e7	387
711b8824 ZW	388	/* Hash step. The hash calculation is duplicated in cpp_lookup and
711b8824 ZW	389	parse_name. */
0d9f234d	390	#define HASHSTEP(r, c) ((r) * 67 + (c - 113));
711b8824	391
58fea6af ZW	392	/* In cpperror.c */
	393	enum error_type { WARNING = 0, PEDWARN, ERROR, FATAL, ICE };
	394	extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
93c80368	395	const char , const cpp_lexer_pos ));
58fea6af	396
711b8824	397	/* In cppmacro.c */
f8f769ea	398	extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
041c3194	399	extern int _cpp_create_definition PARAMS ((cpp_reader , cpp_hashnode ));
93c80368	400	extern void _cpp_pop_context PARAMS ((cpp_reader *));
93c80368	401	extern void _cpp_free_lookaheads PARAMS ((cpp_reader *));
b528a07e	402	extern void _cpp_release_lookahead PARAMS ((cpp_reader *));
93c80368 NB	403	extern void _cpp_push_token PARAMS ((cpp_reader , const cpp_token ,
93c80368 NB	404	const cpp_lexer_pos *));
711b8824 ZW	405
711b8824 ZW	406	/* In cpphash.c */
93c80368 NB	407	extern void _cpp_init_hashtable PARAMS ((cpp_reader *));
	408	extern void _cpp_cleanup_hashtable PARAMS ((cpp_reader *));
	409	extern cpp_hashnode _cpp_lookup_with_hash PARAMS ((cpp_reader, size_t,
	410	unsigned int));
bb52fa7f	411
88ae23e7	412	/* In cppfiles.c */
d6d52dd6	413	extern void _cpp_fake_include PARAMS ((cpp_reader , const char ));
642ce434	414	extern void _cpp_never_reread PARAMS ((struct include_file *));
88ae23e7	415	extern void _cpp_simplify_pathname PARAMS ((char *));
614c7d37	416	extern int _cpp_read_file PARAMS ((cpp_reader , const char ));
93c80368	417	extern void _cpp_execute_include PARAMS ((cpp_reader *,
642ce434	418	const cpp_token *, int, int));
93c80368 NB	419	extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
93c80368 NB	420	const cpp_token *));
c71f835b ZW	421	extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
	422	extern void _cpp_init_includes PARAMS ((cpp_reader *));
	423	extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
f9a0e96c	424	extern void _cpp_pop_file_buffer PARAMS ((cpp_reader , cpp_buffer ));
88ae23e7 ZW	425
	426	/* In cppexp.c */
	427	extern int _cpp_parse_expr PARAMS ((cpp_reader *));
	428
45b966db	429	/* In cpplex.c */
93c80368	430	extern void _cpp_lex_token PARAMS ((cpp_reader , cpp_token ));
15dad1d9 ZW	431	extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
15dad1d9 ZW	432	const cpp_token *));
93c80368 NB	433	extern void _cpp_init_pool PARAMS ((cpp_pool *, unsigned int,
	434	unsigned int, unsigned int));
	435	extern void _cpp_free_pool PARAMS ((cpp_pool *));
	436	extern unsigned char _cpp_pool_reserve PARAMS ((cpp_pool , unsigned int));
	437	extern unsigned char _cpp_pool_alloc PARAMS ((cpp_pool , unsigned int));
	438	extern unsigned char _cpp_next_chunk PARAMS ((cpp_pool , unsigned int,
	439	unsigned char **));
	440	extern void _cpp_lock_pool PARAMS ((cpp_pool *));
	441	extern void _cpp_unlock_pool PARAMS ((cpp_pool *));
45b966db ZW	442
45b966db ZW	443	/* In cpplib.c */
93c80368 NB	444	extern int _cpp_test_assertion PARAMS ((cpp_reader , int ));
	445	extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
	446	extern void _cpp_define_builtin PARAMS ((cpp_reader , const char ));
a5c3cccd	447	extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
c71f835b ZW	448	extern void _cpp_init_stacks PARAMS ((cpp_reader *));
c71f835b ZW	449	extern void _cpp_cleanup_stacks PARAMS ((cpp_reader *));
58fea6af	450	extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
eb1f4d9d NB	451	extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum cpp_fc_reason,
eb1f4d9d NB	452	const char *, unsigned int));
12cf91fe	453
c31a6508	454	/* Utility routines and macros. */
93c80368	455	#define DSC(str) (const U_CHAR *)str, sizeof str - 1
c31a6508	456	#define xnew(T) (T *) xmalloc (sizeof(T))
a58d32c2	457	#define xcnew(T) (T *) xcalloc (1, sizeof(T))
c31a6508	458	#define xnewvec(T, N) (T ) xmalloc (sizeof(T) (N))
711b8824	459	#define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
c71f835b	460	#define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
c31a6508	461
8121d2c3 NB	462	/* These are inline functions instead of macros so we can get type
	463	checking. */
	464	typedef unsigned char U_CHAR;
	465	#define U (const U_CHAR ) / Intended use: U"string" */
	466
	467	static inline int ustrcmp PARAMS ((const U_CHAR , const U_CHAR ));
	468	static inline int ustrncmp PARAMS ((const U_CHAR , const U_CHAR ,
	469	size_t));
	470	static inline size_t ustrlen PARAMS ((const U_CHAR *));
	471	static inline U_CHAR uxstrdup PARAMS ((const U_CHAR ));
	472	static inline U_CHAR ustrchr PARAMS ((const U_CHAR , int));
	473	static inline int ufputs PARAMS ((const U_CHAR , FILE ));
	474
	475	static inline int
	476	ustrcmp (s1, s2)
	477	const U_CHAR s1, s2;
	478	{
	479	return strcmp ((const char )s1, (const char )s2);
	480	}
	481
	482	static inline int
	483	ustrncmp (s1, s2, n)
	484	const U_CHAR s1, s2;
	485	size_t n;
	486	{
	487	return strncmp ((const char )s1, (const char )s2, n);
	488	}
	489
	490	static inline size_t
	491	ustrlen (s1)
	492	const U_CHAR *s1;
	493	{
	494	return strlen ((const char *)s1);
	495	}
	496
	497	static inline U_CHAR *
	498	uxstrdup (s1)
	499	const U_CHAR *s1;
	500	{
	501	return (U_CHAR ) xstrdup ((const char )s1);
	502	}
	503
	504	static inline U_CHAR *
	505	ustrchr (s1, c)
	506	const U_CHAR *s1;
	507	int c;
	508	{
	509	return (U_CHAR ) strchr ((const char )s1, c);
	510	}
	511
	512	static inline int
	513	ufputs (s, f)
	514	const U_CHAR *s;
	515	FILE *f;
	516	{
	517	return fputs ((const char *)s, f);
	518	}
	519
bb52fa7f	520	#endif