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8sa1-gcc/gcc/cpphash.h
Neil Booth eb1f4d9d28 c-lex.c: s/change_file/file_change. 
* c-lex.c: s/change_file/file_change.
        * cpplib.h: Similarly.
        * cppmain.c: Similarly.
        * fix-header.c: Similarly.
        * cppfiles.c (stack_include_file): Pass the buffer location and
        size to cpp_push_buffer.  Generate the file_change callback,
        so that sysp is already set.
        * cpphash.h: Add _cpp_do_file_change.
        * cpplib.c (do_line): Set buffer->sysp directly. Generate the
        file_change callback after setting sysp.
        (_cpp_do_file_change): Handle FC_ENTER and the FC_RENAME exception
        here.
        (cpp_push_buffer): Don't generate a callback.  Clear sysp.
        (cpp_pop_buffer): Clean up logic.

From-SVN: r38357
2000-12-18 19:00:26 +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, extended_numbers))))
/* 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;
};
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;
/* 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;
};
/* 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_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))
#endif
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