486 lines
15 KiB
C
486 lines
15 KiB
C
/* Part of CPP library.
|
|
Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
|
|
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_H
|
|
#define GCC_CPPHASH_H
|
|
|
|
#include "hashtable.h"
|
|
|
|
struct directive; /* Deliberately incomplete. */
|
|
|
|
/* 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_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
|
|
|
|
/* A generic memory buffer, and operations on it. */
|
|
typedef struct _cpp_buff _cpp_buff;
|
|
struct _cpp_buff
|
|
{
|
|
struct _cpp_buff *next;
|
|
unsigned char *base, *cur, *limit;
|
|
};
|
|
|
|
extern _cpp_buff *_cpp_get_buff PARAMS ((cpp_reader *, size_t));
|
|
extern void _cpp_release_buff PARAMS ((cpp_reader *, _cpp_buff *));
|
|
extern void _cpp_extend_buff PARAMS ((cpp_reader *, _cpp_buff **, size_t));
|
|
extern _cpp_buff *_cpp_append_extend_buff PARAMS ((cpp_reader *, _cpp_buff *,
|
|
size_t));
|
|
extern void _cpp_free_buff PARAMS ((_cpp_buff *));
|
|
extern unsigned char *_cpp_aligned_alloc PARAMS ((cpp_reader *, size_t));
|
|
extern unsigned char *_cpp_unaligned_alloc PARAMS ((cpp_reader *, size_t));
|
|
|
|
#define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
|
|
#define BUFF_FRONT(BUFF) ((BUFF)->cur)
|
|
#define BUFF_LIMIT(BUFF) ((BUFF)->limit)
|
|
|
|
/* List of directories to look for include files in. */
|
|
struct search_path
|
|
{
|
|
struct search_path *next;
|
|
|
|
/* NOTE: NAME may not be null terminated for the case of the current
|
|
file's directory! */
|
|
const char *name;
|
|
unsigned int len;
|
|
/* 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;
|
|
/* Non-zero if it is a 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;
|
|
};
|
|
|
|
/* #include types. */
|
|
enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
|
|
|
|
union utoken
|
|
{
|
|
const cpp_token *token;
|
|
const cpp_token **ptoken;
|
|
};
|
|
|
|
/* A "run" of tokens; part of a chain of runs. */
|
|
typedef struct tokenrun tokenrun;
|
|
struct tokenrun
|
|
{
|
|
tokenrun *next, *prev;
|
|
cpp_token *base, *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. */
|
|
union utoken first;
|
|
union utoken last;
|
|
|
|
/* If non-NULL, a buffer used for storage related to this context.
|
|
When the context is popped, the buffer is released. */
|
|
_cpp_buff *buff;
|
|
|
|
/* For a macro context, the macro node, otherwise NULL. */
|
|
cpp_hashnode *macro;
|
|
|
|
/* True if utoken element is token, else ptoken. */
|
|
bool direct_p;
|
|
};
|
|
|
|
struct lexer_state
|
|
{
|
|
/* Nonzero if first token on line is CPP_HASH. */
|
|
unsigned char in_directive;
|
|
|
|
/* True if we are skipping a failed conditional group. */
|
|
unsigned char skipping;
|
|
|
|
/* 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;
|
|
|
|
/* 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;
|
|
};
|
|
|
|
/* Special nodes - identifiers with predefined significance. */
|
|
struct spec_nodes
|
|
{
|
|
cpp_hashnode *n_defined; /* defined operator */
|
|
cpp_hashnode *n_true; /* C++ keyword true */
|
|
cpp_hashnode *n_false; /* C++ keyword false */
|
|
cpp_hashnode *n__STRICT_ANSI__; /* STDC_0_IN_SYSTEM_HEADERS */
|
|
cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
|
|
};
|
|
|
|
/* Represents the contents of a file cpplib has read in. */
|
|
struct cpp_buffer
|
|
{
|
|
const unsigned char *cur; /* current position */
|
|
const unsigned char *backup_to; /* if peeked character is not wanted */
|
|
const unsigned char *rlimit; /* end of valid data */
|
|
const unsigned char *line_base; /* start of current line */
|
|
|
|
struct cpp_buffer *prev;
|
|
|
|
const unsigned char *buf; /* Entire character buffer. */
|
|
|
|
/* Pointer into the include table; non-NULL if this is a file
|
|
buffer. 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;
|
|
|
|
/* 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;
|
|
|
|
/* Nonzero means that the directory to start searching for ""
|
|
include files has been calculated and stored in "dir" below. */
|
|
unsigned char search_cached;
|
|
|
|
/* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is
|
|
true, a CPP_EOF token is then returned. Otherwise, the next
|
|
token from the enclosing buffer is returned. */
|
|
bool return_at_eof;
|
|
|
|
/* The directory of the this buffer's file. Its NAME member is not
|
|
allocated, so we don't need to worry about freeing it. */
|
|
struct search_path dir;
|
|
};
|
|
|
|
/* 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;
|
|
|
|
/* Source line tracking. */
|
|
struct line_maps line_maps;
|
|
const struct line_map *map;
|
|
unsigned int line;
|
|
|
|
/* The line of the '#' of the current directive. */
|
|
unsigned int directive_line;
|
|
|
|
/* Memory buffers. */
|
|
_cpp_buff *a_buff; /* Aligned permanent storage. */
|
|
_cpp_buff *u_buff; /* Unaligned permanent storage. */
|
|
_cpp_buff *free_buffs; /* Free buffer chain. */
|
|
|
|
/* 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. */
|
|
const cpp_hashnode *mi_cmacro;
|
|
const cpp_hashnode *mi_ind_cmacro;
|
|
bool mi_valid;
|
|
|
|
/* Lexing. */
|
|
cpp_token *cur_token;
|
|
tokenrun base_run, *cur_run;
|
|
unsigned int lookaheads;
|
|
|
|
/* Non-zero prevents the lexer from re-using the token runs. */
|
|
unsigned int keep_tokens;
|
|
|
|
/* Error counter for exit code. */
|
|
unsigned int errors;
|
|
|
|
/* Line and column where a newline was first seen in a string
|
|
constant (multi-line strings). */
|
|
unsigned int mls_line;
|
|
unsigned int mls_col;
|
|
|
|
/* Buffer to hold macro definition string. */
|
|
unsigned char *macro_buffer;
|
|
unsigned int macro_buffer_len;
|
|
|
|
/* Tree of other included files. See cppfiles.c. */
|
|
struct splay_tree_s *all_include_files;
|
|
|
|
/* 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;
|
|
|
|
/* EOF token, and a token forcing paste avoidance. */
|
|
cpp_token avoid_paste;
|
|
cpp_token eof;
|
|
|
|
/* 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;
|
|
|
|
/* Identifier hash table. */
|
|
struct ht *hash_table;
|
|
|
|
/* User visible options. */
|
|
struct cpp_options opts;
|
|
|
|
/* Special nodes - identifiers with predefined significance to the
|
|
preprocessor. */
|
|
struct spec_nodes spec_nodes;
|
|
|
|
/* Whether to print our version number. Done this way so
|
|
we don't get it twice for -v -version. */
|
|
unsigned char print_version;
|
|
|
|
/* Whether cpplib owns the hashtable. */
|
|
unsigned char our_hashtable;
|
|
};
|
|
|
|
/* 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_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
|
|
#define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
|
|
#define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
|
|
#define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
|
|
|
|
/* In cpperror.c */
|
|
enum error_type { WARNING = 0, WARNING_SYSHDR, PEDWARN, ERROR, FATAL, ICE };
|
|
extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
|
|
unsigned int, unsigned int));
|
|
|
|
/* 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 *));
|
|
|
|
/* In cpphash.c */
|
|
extern void _cpp_init_hashtable PARAMS ((cpp_reader *, hash_table *));
|
|
extern void _cpp_destroy_hashtable PARAMS ((cpp_reader *));
|
|
|
|
/* In cppfiles.c */
|
|
extern void _cpp_fake_include PARAMS ((cpp_reader *, const char *));
|
|
extern void _cpp_never_reread PARAMS ((struct include_file *));
|
|
extern char *_cpp_simplify_pathname PARAMS ((char *));
|
|
extern bool _cpp_read_file PARAMS ((cpp_reader *, const char *));
|
|
extern bool _cpp_execute_include PARAMS ((cpp_reader *,
|
|
const cpp_token *,
|
|
enum include_type));
|
|
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 bool _cpp_pop_file_buffer PARAMS ((cpp_reader *,
|
|
struct include_file *));
|
|
|
|
/* In cppexp.c */
|
|
extern int _cpp_parse_expr PARAMS ((cpp_reader *));
|
|
|
|
/* In cpplex.c */
|
|
extern cpp_token *_cpp_temp_token PARAMS ((cpp_reader *));
|
|
extern const cpp_token *_cpp_lex_token PARAMS ((cpp_reader *));
|
|
extern cpp_token *_cpp_lex_direct PARAMS ((cpp_reader *));
|
|
extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
|
|
const cpp_token *));
|
|
extern void _cpp_init_tokenrun PARAMS ((tokenrun *, unsigned int));
|
|
|
|
/* In cppinit.c. */
|
|
extern bool _cpp_push_next_buffer PARAMS ((cpp_reader *));
|
|
|
|
/* 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_directives PARAMS ((cpp_reader *));
|
|
extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
|
|
extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
|
|
const char *,
|
|
unsigned int, unsigned int));
|
|
extern void _cpp_pop_buffer 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))
|
|
|
|
/* 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 /* ! GCC_CPPHASH_H */
|