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8sa1-gcc/gcc/cpphash.h
Neil Booth a5c3cccda4 cppfiles.c (stack_include_file): Check for stacked contexts here. 
* cppfiles.c (stack_include_file): Check for stacked contexts
	here.
	* cpphash.h (_cpp_do__Pragma): New prototype.
	* cppinit.c (cpp_reader_init): Add _Pragma keyword to hash table.

	* cpplex.c (skip_escaped_newlines): Only process trigraphs and
	escaped newlines if !(buffer->from_stage3).
	(_cpp_lex_token): Warn about missing newlines iff
	!buffer->from_stage3.

	* cpplib.c (get__Pragma_string, destringize,
	_cpp_do__Pragma): New functions.
	(run_directive): Set output_line for _Pragma to avoid line
	markers in output.  Set from_stage3 and prevent macro expansion
	for _Pragma and command-line options.  Check buffer exhaustion.
	(cpp_push_buffer): Don't check for stacked macro contexts, as
	this is perfectly legitimate for _Pragma.  Move the check to
	stack_include_file instead. Set from_stage3 iff buffer is
	preprocessed input.

	* cpplib.h (struct cpp_buffer): Make warned_cplusplus_comments
	unsigned. New boolean from_stage3.
	(struct spec_nodes): Add n__Pragma.

	* cppmacro.c (enter_macro_context): Flip sense of return value.
	(_cpp_get_token): Handle _Pragma operator.

From-SVN: r37147
2000-10-30 22:29:00 +00:00

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/* Part of CPP library.
Copyright (C) 1997, 1998, 1999, 2000 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__
/* 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, c89))))
/* Memory pools. */
#define 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 += 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;
};
/* 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;
};
#define ABSOLUTE_PATH ((struct file_name_list *)-1)
/* This structure is used for the table of all includes. */
struct include_file
{
const char *name; /* actual path name of file */
const cpp_hashnode *cmacro; /* macro, if any, preventing reinclusion. */
const struct file_name_list *foundhere;
/* location in search path where file was
found, for #include_next */
const unsigned char *buffer; /* pointer to cached file contents */
struct stat st; /* copy of stat(2) data for file */
int fd; /* fd open on file (short term storage only) */
unsigned short include_count; /* number of times file has been read */
unsigned short refcnt; /* number of stacked buffers using this file */
unsigned char sysp; /* file is a system header */
unsigned char mapped; /* file buffer is mmapped */
unsigned char defined; /* cmacro prevents inclusion in this state */
};
/* The cmacro works like this: If it's NULL, the file is to be
included again. If it's NEVER_REREAD, the file is never to be
included again. Otherwise it is a macro hashnode, and the file is
to be included again if the macro is defined or not as specified by
DEFINED. */
#define NEVER_REREAD ((const cpp_hashnode *)-1)
#define DO_NOT_REREAD(inc) \
((inc)->cmacro && ((inc)->cmacro == NEVER_REREAD \
|| ((inc)->cmacro->type == NT_MACRO) == (inc)->defined))
/* Character classes.
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 ISidnum 0x01 /* a-zA-Z0-9_ */
#define ISidstart 0x02 /* _a-zA-Z */
#define ISnumstart 0x04 /* 0-9 */
#define IShspace 0x08 /* ' ' \t */
#define ISvspace 0x10 /* \r \n */
#define ISspace 0x20 /* ' ' \t \r \n \f \v \0 */
#define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
#define is_idchar(x) ((_cpp_IStable[x] & ISidnum) || _dollar_ok(x))
#define is_idstart(x) ((_cpp_IStable[x] & ISidstart) || _dollar_ok(x))
#define is_numchar(x) (_cpp_IStable[x] & ISidnum)
#define is_numstart(x) (_cpp_IStable[x] & ISnumstart)
#define is_hspace(x) (_cpp_IStable[x] & IShspace)
#define is_vspace(x) (_cpp_IStable[x] & ISvspace)
#define is_nvspace(x) ((_cpp_IStable[x] & (ISspace | ISvspace)) == ISspace)
#define is_space(x) (_cpp_IStable[x] & ISspace)
/* These tables are constant if they 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_IStable[UCHAR_MAX + 1];
extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
#else
extern unsigned char _cpp_IStable[UCHAR_MAX + 1];
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)->inc \
&& CPP_BUFFER (PFILE)->inc->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_get_token PARAMS ((cpp_reader *, cpp_token *));
extern void _cpp_free_lookaheads 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_simplify_pathname PARAMS ((char *));
extern void _cpp_execute_include PARAMS ((cpp_reader *,
const cpp_token *, int,
struct file_name_list *));
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 const char *_cpp_fake_include PARAMS ((cpp_reader *, const char *));
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 *));
/* 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))
#endif
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