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8sa1-gcc/gcc/cpphash.h
Nathan Sidwell f3f751adcb cpp.texi: Document #pragma GCC dependency 
* cpp.texi: Document #pragma GCC dependency
	* cppfiles.c (open_include_file): Set date to unknown.
	(_cpp_compare_file_date): New function.
	(read_include_file): Set file date.
	* cpphash.h (struct include_file): Add date member.
	(_cpp_compare_file_date): Prototype.
	* cpplib.c (parse_include): Add trail parameter. Adjust.
	(do_include): Adjust parse_include call.
	(do_import): Likewise.
	(do_include_next): Likewise.
	(gcc_pragmas): Add dependency pragma.
	(do_pragma_dependancy): New pragma.

From-SVN: r34808
2000-06-30 09:47:49 +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__
typedef unsigned char U_CHAR;
#define U (const U_CHAR *) /* Intended use: U"string" */
/* Structure used for assertion predicates. */
struct predicate
{
struct predicate *next;
struct cpp_toklist answer;
};
/* 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 */
int fd; /* file descriptor possibly open on file */
unsigned short include_count; /* number of times file has been read */
unsigned short sysp; /* file is a system header */
time_t date; /* modification date of file, if known */
};
/* 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 not defined. */
#define NEVER_REREAD ((const cpp_hashnode *)-1)
#define DO_NOT_REREAD(inc) \
((inc)->cmacro && \
((inc)->cmacro == NEVER_REREAD || (inc)->cmacro->type != T_VOID))
/* 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] */
#define ISidnum 0x01 /* a-zA-Z0-9_ */
#define ISidstart 0x02 /* _a-zA-Z */
#define ISnumstart 0x04 /* 0-9 */
#define IShspace 0x08 /* ' ' \t \f \v */
#define ISspace 0x10 /* ' ' \t \f \v \n */
#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_space(x) (_cpp_IStable[x] & ISspace)
/* 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 (GCC_VERSION >= 2007) || (__STDC_VERSION__ >= 199901L)
extern const unsigned char _cpp_IStable[256];
#else
extern unsigned char _cpp_IStable[256];
#endif
/* Macros. */
/* One character lookahead in the input buffer. Note that if this
returns EOF, it does *not* necessarily mean the file's end has been
reached. */
#define CPP_BUF_PEEK(BUFFER) \
((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF)
/* Make sure PFILE->token_buffer has space for at least N more characters. */
#define CPP_RESERVE(PFILE, N) \
(CPP_WRITTEN (PFILE) + (size_t)(N) > (PFILE)->token_buffer_size \
&& (_cpp_grow_token_buffer (PFILE, N), 0))
/* Append string STR (of length N) to PFILE's output buffer.
Assume there is enough space. */
#define CPP_PUTS_Q(PFILE, STR, N) \
(memcpy ((PFILE)->limit, STR, (N)), (PFILE)->limit += (N))
/* Append string STR (of length N) to PFILE's output buffer. Make space. */
#define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N)
/* Append character CH to PFILE's output buffer. Assume sufficient space. */
#define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH))
/* Append character CH to PFILE's output buffer. Make space if need be. */
#define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH))
/* Advance the current line by one. */
#define CPP_BUMP_BUFFER_LINE(PBUF) ((PBUF)->lineno++,\
(PBUF)->line_base = (PBUF)->cur)
#define CPP_BUMP_LINE(PFILE) CPP_BUMP_BUFFER_LINE(CPP_BUFFER(PFILE))
#define CPP_BUMP_BUFFER_LINE_CUR(PBUF, CUR) ((PBUF)->lineno++,\
(PBUF)->line_base = CUR)
#define CPP_BUMP_LINE_CUR(PFILE, CUR) \
CPP_BUMP_BUFFER_LINE_CUR(CPP_BUFFER(PFILE), CUR)
#define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->prev)
/* Are we in column 1 right now? Used mainly for -traditional handling
of directives. */
#define CPP_IN_COLUMN_1(PFILE) \
(CPP_BUFFER (PFILE)->cur - CPP_BUFFER (PFILE)->line_base == 1)
#define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
#define CPP_TRADITIONAL(PFILE) CPP_OPTION (PFILE, traditional)
#define CPP_IN_SYSTEM_HEADER(PFILE) (cpp_file_buffer (PFILE)->inc->sysp)
#define CPP_PEDANTIC(PF) \
(CPP_OPTION (PF, pedantic) && !CPP_IN_SYSTEM_HEADER (PF))
#define CPP_WTRADITIONAL(PF) \
(CPP_OPTION (PF, warn_traditional) && !CPP_IN_SYSTEM_HEADER (PF))
/* CPP_IS_MACRO_BUFFER is true if the buffer contains macro expansion.
(Note that it is false while we're expanding macro *arguments*.) */
#define CPP_IS_MACRO_BUFFER(PBUF) ((PBUF)->macro != NULL)
/* Remember the current position of PFILE so it may be returned to
after looking ahead a bit.
Note that when you set a mark, you _must_ return to that mark. You
may not forget about it and continue parsing. You may not pop a
buffer with an active mark. You may not call CPP_BUMP_LINE while a
mark is active. */
#define CPP_SET_BUF_MARK(IP) ((IP)->mark = (IP)->cur)
#define CPP_GOTO_BUF_MARK(IP) ((IP)->cur = (IP)->mark, (IP)->mark = 0)
#define CPP_SET_MARK(PFILE) CPP_SET_BUF_MARK(CPP_BUFFER(PFILE))
#define CPP_GOTO_MARK(PFILE) CPP_GOTO_BUF_MARK(CPP_BUFFER(PFILE))
/* ACTIVE_MARK_P is true if there's a live mark in the buffer. */
#define ACTIVE_MARK_P(PFILE) (CPP_BUFFER (PFILE)->mark != 0)
/* Are mark and point adjacent characters? Used mostly to deal with
the somewhat annoying semantic of #define. */
#define ADJACENT_TO_MARK(PFILE) \
(CPP_BUFFER(PFILE)->cur - CPP_BUFFER(PFILE)->mark == 1)
/* Flags for _cpp_init_toklist. */
#define DUMMY_TOKEN 0
#define NO_DUMMY_TOKEN 1
/* In cpphash.c */
extern unsigned int _cpp_calc_hash PARAMS ((const U_CHAR *, size_t));
extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_toklist *,
cpp_hashnode *));
extern void _cpp_dump_definition PARAMS ((cpp_reader *, cpp_hashnode *));
extern void _cpp_quote_string PARAMS ((cpp_reader *, const U_CHAR *));
extern void _cpp_macroexpand PARAMS ((cpp_reader *, cpp_hashnode *));
extern void _cpp_init_macro_hash PARAMS ((cpp_reader *));
extern void _cpp_dump_macro_hash PARAMS ((cpp_reader *));
/* In cppfiles.c */
extern void _cpp_simplify_pathname PARAMS ((char *));
extern void _cpp_execute_include PARAMS ((cpp_reader *, U_CHAR *,
unsigned int, int,
struct file_name_list *));
extern int _cpp_compare_file_date PARAMS ((cpp_reader *, U_CHAR *,
unsigned int,
struct file_name_list *));
extern void _cpp_init_include_table PARAMS ((cpp_reader *));
extern const char *_cpp_fake_include PARAMS ((cpp_reader *, const char *));
/* In cppexp.c */
extern int _cpp_parse_expr PARAMS ((cpp_reader *));
/* In cpplex.c */
extern void _cpp_parse_name PARAMS ((cpp_reader *, int));
extern void _cpp_skip_rest_of_line PARAMS ((cpp_reader *));
extern void _cpp_skip_hspace PARAMS ((cpp_reader *));
extern void _cpp_expand_to_buffer PARAMS ((cpp_reader *,
const unsigned char *, int));
extern int _cpp_parse_assertion PARAMS ((cpp_reader *));
extern enum cpp_ttype _cpp_lex_token PARAMS ((cpp_reader *));
extern ssize_t _cpp_prescan PARAMS ((cpp_reader *, cpp_buffer *,
ssize_t));
extern void _cpp_init_input_buffer PARAMS ((cpp_reader *));
extern void _cpp_grow_token_buffer PARAMS ((cpp_reader *, long));
extern enum cpp_ttype _cpp_get_directive_token
PARAMS ((cpp_reader *));
extern enum cpp_ttype _cpp_get_define_token
PARAMS ((cpp_reader *));
extern enum cpp_ttype _cpp_scan_until PARAMS ((cpp_reader *, cpp_toklist *,
enum cpp_ttype));
extern void _cpp_init_toklist PARAMS ((cpp_toklist *, int));
extern void _cpp_clear_toklist PARAMS ((cpp_toklist *));
extern void _cpp_free_toklist PARAMS ((cpp_toklist *));
extern void _cpp_slice_toklist PARAMS ((cpp_toklist *,
const cpp_token *,
const cpp_token *));
extern void _cpp_squeeze_toklist PARAMS ((cpp_toklist *));
extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
const cpp_token *));
extern int _cpp_equiv_toklists PARAMS ((const cpp_toklist *,
const cpp_toklist *));
extern void _cpp_expand_token_space PARAMS ((cpp_toklist *, unsigned int));
/* In cpplib.c */
extern int _cpp_handle_directive PARAMS ((cpp_reader *));
extern void _cpp_unwind_if_stack PARAMS ((cpp_reader *, cpp_buffer *));
extern void _cpp_check_directive PARAMS ((cpp_toklist *, cpp_token *));
/* Utility routines and macros. */
#define xnew(T) (T *) xmalloc (sizeof(T))
#define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
/* These are inline functions instead of macros so we can get type
checking. */
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
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);
}
#endif
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