/* 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. */
struct pending_option;
struct op;
typedef unsigned char uchar;
#define U (const uchar *) /* Intended use: U"string" */
#define BITS_PER_CPPCHAR_T (CHAR_BIT * sizeof (cppchar_t))
/* 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
/* Host alignment handling. */
struct dummy
{
char c;
union
{
double d;
int *p;
} u;
};
#define DEFAULT_ALIGNMENT offsetof (struct dummy, u)
#define CPP_ALIGN2(size, align) (((size) + ((align) - 1)) & ~((align) - 1))
#define CPP_ALIGN(size) CPP_ALIGN2 (size, DEFAULT_ALIGNMENT)
/* Each macro definition is recorded in a cpp_macro structure.
Variadic macros cannot occur with traditional cpp. */
struct cpp_macro
{
/* Parameters, if any. */
cpp_hashnode **params;
/* Replacement tokens (ISO) or replacement text (traditional). See
comment at top of cpptrad.c for how traditional function-like
macros are encoded. */
union
{
cpp_token *tokens;
const uchar *text;
} exp;
/* Definition line number. */
unsigned int line;
/* Number of tokens in expansion, or bytes for traditional macros. */
unsigned int count;
/* Number of parameters. */
unsigned short paramc;
/* If a function-like macro. */
unsigned int fun_like : 1;
/* If a variadic macro. */
unsigned int variadic : 1;
/* If macro defined in system header. */
unsigned int syshdr : 1;
/* Nonzero if it has been expanded or had its existence tested. */
unsigned int used : 1;
};
#define _cpp_mark_macro_used(NODE) do { \
if ((NODE)->type == NT_MACRO && !((NODE)->flags & NODE_BUILTIN)) \
(NODE)->value.macro->used = 1; } while (0)
/* 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;
/* Nonzero 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;
};
/* Accessor macros for struct cpp_context. */
#define FIRST(c) ((c)->u.iso.first)
#define LAST(c) ((c)->u.iso.last)
#define CUR(c) ((c)->u.trad.cur)
#define RLIMIT(c) ((c)->u.trad.rlimit)
typedef struct cpp_context cpp_context;
struct cpp_context
{
/* Doubly-linked list. */
cpp_context *next, *prev;
union
{
/* For ISO macro expansion. Contexts other than the base context
are contiguous tokens. e.g. macro expansions, expanded
argument tokens. */
struct
{
union utoken first;
union utoken last;
} iso;
/* For traditional macro expansion. */
struct
{
const uchar *cur;
const uchar *rlimit;
} trad;
} u;
/* 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;
/* Nonzero if in a directive that will handle padding tokens itself.
#include needs this to avoid problems with computed include and
spacing between tokens. */
unsigned char directive_wants_padding;
/* 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 if in a #if or #elif directive. */
unsigned char in_expression;
/* 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;
/* Nonzero to skip evaluating part of an expression. */
unsigned int skip_eval;
};
/* 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__VA_ARGS__; /* C99 vararg macros */
};
/* Encapsulates state used to convert a stream of tokens into a text
file. */
struct printer
{
FILE *outf; /* Stream to write to. */
const struct line_map *map; /* Logical to physical line mappings. */
const cpp_token *prev; /* Previous token. */
const cpp_token *source; /* Source token for spacing. */
unsigned int line; /* Line currently being written. */
unsigned char printed; /* Nonzero if something output at line. */
};
/* 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;
/* Used for buffer overlays by cpptrad.c. */
const uchar *saved_cur, *saved_rlimit;
};
/* 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;
/* Overlaid buffer (can be different after processing #include). */
cpp_buffer *overlaid_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;
/* The next -include-d file; NULL if they all are done. If it
points to NULL, the last one is in progress, and
_cpp_maybe_push_include_file has yet to restore the line map. */
struct pending_option **next_include_file;
/* 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;
/* Nonzero prevents the lexer from re-using the token runs. */
unsigned int keep_tokens;
/* Error counter for exit code. */
unsigned int errors;
/* 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;
/* Macros on or after this line are warned about if unused. */
unsigned int first_unused_line;
/* Date and time text. Calculated together if either is requested. */
const uchar *date;
const uchar *time;
/* EOF token, and a token forcing paste avoidance. */
cpp_token avoid_paste;
cpp_token eof;
/* Opaque handle to the dependencies of mkdeps.c. */
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;
/* Expression parser stack. */
struct op *op_stack, *op_limit;
/* User visible options. */
struct cpp_options opts;
/* Special nodes - identifiers with predefined significance to the
preprocessor. */
struct spec_nodes spec_nodes;
/* Used when doing preprocessed output. */
struct printer print;
/* Whether cpplib owns the hashtable. */
unsigned char our_hashtable;
/* Traditional preprocessing output buffer (a logical line). */
struct
{
uchar *base;
uchar *limit;
uchar *cur;
unsigned int first_line;
} out;
/* Used to save the original line number during traditional
preprocessing. */
unsigned int saved_line;
};
/* 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_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 */
extern int _cpp_begin_message PARAMS ((cpp_reader *, int,
unsigned int, unsigned int));
/* In cppmacro.c */
extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
extern bool _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
extern void _cpp_pop_context PARAMS ((cpp_reader *));
extern void _cpp_push_text_context PARAMS ((cpp_reader *, cpp_hashnode *,
const uchar *, size_t));
extern bool _cpp_save_parameter PARAMS ((cpp_reader *, cpp_macro *,
cpp_hashnode *));
extern bool _cpp_arguments_ok PARAMS ((cpp_reader *, cpp_macro *,
const cpp_hashnode *,
unsigned int));
extern const uchar *_cpp_builtin_macro_text PARAMS ((cpp_reader *,
cpp_hashnode *));
int _cpp_warn_if_unused_macro PARAMS ((cpp_reader *, cpp_hashnode *,
void *));
/* 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 void _cpp_pop_file_buffer PARAMS ((cpp_reader *,
struct include_file *));
/* In cppexp.c */
extern bool _cpp_parse_expr PARAMS ((cpp_reader *));
extern struct op *_cpp_expand_op_stack 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 void _cpp_maybe_push_include_file PARAMS ((cpp_reader *));
/* In cpplib.c */
extern int _cpp_test_assertion PARAMS ((cpp_reader *, unsigned 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 *));
/* In cpptrad.c. */
extern bool _cpp_read_logical_line_trad PARAMS ((cpp_reader *));
extern void _cpp_overlay_buffer PARAMS ((cpp_reader *pfile, const uchar *,
size_t));
extern void _cpp_remove_overlay PARAMS ((cpp_reader *));
extern bool _cpp_create_trad_definition PARAMS ((cpp_reader *, cpp_macro *));
extern bool _cpp_expansions_different_trad PARAMS ((const cpp_macro *,
const cpp_macro *));
extern uchar *_cpp_copy_replacement_text PARAMS ((const cpp_macro *, uchar *));
extern size_t _cpp_replacement_text_len PARAMS ((const cpp_macro *));
/* Utility routines and macros. */
#define DSC(str) (const uchar *)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. */
static inline int ustrcmp PARAMS ((const uchar *, const uchar *));
static inline int ustrncmp PARAMS ((const uchar *, const uchar *,
size_t));
static inline size_t ustrlen PARAMS ((const uchar *));
static inline uchar *uxstrdup PARAMS ((const uchar *));
static inline uchar *ustrchr PARAMS ((const uchar *, int));
static inline int ufputs PARAMS ((const uchar *, FILE *));
static inline int
ustrcmp (s1, s2)
const uchar *s1, *s2;
{
return strcmp ((const char *)s1, (const char *)s2);
}
static inline int
ustrncmp (s1, s2, n)
const uchar *s1, *s2;
size_t n;
{
return strncmp ((const char *)s1, (const char *)s2, n);
}
static inline size_t
ustrlen (s1)
const uchar *s1;
{
return strlen ((const char *)s1);
}
static inline uchar *
uxstrdup (s1)
const uchar *s1;
{
return (uchar *) xstrdup ((const char *)s1);
}
static inline uchar *
ustrchr (s1, c)
const uchar *s1;
int c;
{
return (uchar *) strchr ((const char *)s1, c);
}
static inline int
ufputs (s, f)
const uchar *s;
FILE *f;
{
return fputs ((const char *)s, f);
}
#endif /* ! GCC_CPPHASH_H */
