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Rev 154 → Rev 816

/cpplib.h
0,0 → 1,853
/* Definitions for CPP library.
Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
2004, 2005
Free Software Foundation, Inc.
Written by Per Bothner, 1994-95.
 
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding! */
#ifndef LIBCPP_CPPLIB_H
#define LIBCPP_CPPLIB_H
 
#include <sys/types.h>
#include "symtab.h"
#include "line-map.h"
 
#ifdef __cplusplus
extern "C" {
#endif
 
typedef struct cpp_reader cpp_reader;
typedef struct cpp_buffer cpp_buffer;
typedef struct cpp_options cpp_options;
typedef struct cpp_token cpp_token;
typedef struct cpp_string cpp_string;
typedef struct cpp_hashnode cpp_hashnode;
typedef struct cpp_macro cpp_macro;
typedef struct cpp_callbacks cpp_callbacks;
typedef struct cpp_dir cpp_dir;
 
struct answer;
struct _cpp_file;
 
/* The first three groups, apart from '=', can appear in preprocessor
expressions (+= and -= are used to indicate unary + and - resp.).
This allows a lookup table to be implemented in _cpp_parse_expr.
 
The first group, to CPP_LAST_EQ, can be immediately followed by an
'='. The lexer needs operators ending in '=', like ">>=", to be in
the same order as their counterparts without the '=', like ">>".
 
See the cpp_operator table optab in expr.c if you change the order or
add or remove anything in the first group. */
 
#define TTYPE_TABLE \
OP(EQ, "=") \
OP(NOT, "!") \
OP(GREATER, ">") /* compare */ \
OP(LESS, "<") \
OP(PLUS, "+") /* math */ \
OP(MINUS, "-") \
OP(MULT, "*") \
OP(DIV, "/") \
OP(MOD, "%") \
OP(AND, "&") /* bit ops */ \
OP(OR, "|") \
OP(XOR, "^") \
OP(RSHIFT, ">>") \
OP(LSHIFT, "<<") \
\
OP(COMPL, "~") \
OP(AND_AND, "&&") /* logical */ \
OP(OR_OR, "||") \
OP(QUERY, "?") \
OP(COLON, ":") \
OP(COMMA, ",") /* grouping */ \
OP(OPEN_PAREN, "(") \
OP(CLOSE_PAREN, ")") \
TK(EOF, NONE) \
OP(EQ_EQ, "==") /* compare */ \
OP(NOT_EQ, "!=") \
OP(GREATER_EQ, ">=") \
OP(LESS_EQ, "<=") \
\
/* These two are unary + / - in preprocessor expressions. */ \
OP(PLUS_EQ, "+=") /* math */ \
OP(MINUS_EQ, "-=") \
\
OP(MULT_EQ, "*=") \
OP(DIV_EQ, "/=") \
OP(MOD_EQ, "%=") \
OP(AND_EQ, "&=") /* bit ops */ \
OP(OR_EQ, "|=") \
OP(XOR_EQ, "^=") \
OP(RSHIFT_EQ, ">>=") \
OP(LSHIFT_EQ, "<<=") \
/* Digraphs together, beginning with CPP_FIRST_DIGRAPH. */ \
OP(HASH, "#") /* digraphs */ \
OP(PASTE, "##") \
OP(OPEN_SQUARE, "[") \
OP(CLOSE_SQUARE, "]") \
OP(OPEN_BRACE, "{") \
OP(CLOSE_BRACE, "}") \
/* The remainder of the punctuation. Order is not significant. */ \
OP(SEMICOLON, ";") /* structure */ \
OP(ELLIPSIS, "...") \
OP(PLUS_PLUS, "++") /* increment */ \
OP(MINUS_MINUS, "--") \
OP(DEREF, "->") /* accessors */ \
OP(DOT, ".") \
OP(SCOPE, "::") \
OP(DEREF_STAR, "->*") \
OP(DOT_STAR, ".*") \
OP(ATSIGN, "@") /* used in Objective-C */ \
\
TK(NAME, IDENT) /* word */ \
TK(AT_NAME, IDENT) /* @word - Objective-C */ \
TK(NUMBER, LITERAL) /* 34_be+ta */ \
\
TK(CHAR, LITERAL) /* 'char' */ \
TK(WCHAR, LITERAL) /* L'char' */ \
TK(OTHER, LITERAL) /* stray punctuation */ \
\
TK(STRING, LITERAL) /* "string" */ \
TK(WSTRING, LITERAL) /* L"string" */ \
TK(OBJC_STRING, LITERAL) /* @"string" - Objective-C */ \
TK(HEADER_NAME, LITERAL) /* <stdio.h> in #include */ \
\
TK(COMMENT, LITERAL) /* Only if output comments. */ \
/* SPELL_LITERAL happens to DTRT. */ \
TK(MACRO_ARG, NONE) /* Macro argument. */ \
TK(PRAGMA, NONE) /* Only for deferred pragmas. */ \
TK(PRAGMA_EOL, NONE) /* End-of-line for deferred pragmas. */ \
TK(PADDING, NONE) /* Whitespace for -E. */
 
#define OP(e, s) CPP_ ## e,
#define TK(e, s) CPP_ ## e,
enum cpp_ttype
{
TTYPE_TABLE
N_TTYPES,
 
/* Positions in the table. */
CPP_LAST_EQ = CPP_LSHIFT,
CPP_FIRST_DIGRAPH = CPP_HASH,
CPP_LAST_PUNCTUATOR= CPP_ATSIGN,
CPP_LAST_CPP_OP = CPP_LESS_EQ
};
#undef OP
#undef TK
 
/* C language kind, used when calling cpp_create_reader. */
enum c_lang {CLK_GNUC89 = 0, CLK_GNUC99, CLK_STDC89, CLK_STDC94, CLK_STDC99,
CLK_GNUCXX, CLK_CXX98, CLK_ASM};
 
/* Payload of a NUMBER, STRING, CHAR or COMMENT token. */
struct cpp_string GTY(())
{
unsigned int len;
const unsigned char *text;
};
 
/* Flags for the cpp_token structure. */
#define PREV_WHITE (1 << 0) /* If whitespace before this token. */
#define DIGRAPH (1 << 1) /* If it was a digraph. */
#define STRINGIFY_ARG (1 << 2) /* If macro argument to be stringified. */
#define PASTE_LEFT (1 << 3) /* If on LHS of a ## operator. */
#define NAMED_OP (1 << 4) /* C++ named operators. */
#define NO_EXPAND (1 << 5) /* Do not macro-expand this token. */
#define BOL (1 << 6) /* Token at beginning of line. */
#define PURE_ZERO (1 << 7) /* Single 0 digit, used by the C++ frontend,
set in c-lex.c. */
 
/* Specify which field, if any, of the cpp_token union is used. */
 
enum cpp_token_fld_kind {
CPP_TOKEN_FLD_NODE,
CPP_TOKEN_FLD_SOURCE,
CPP_TOKEN_FLD_STR,
CPP_TOKEN_FLD_ARG_NO,
CPP_TOKEN_FLD_PRAGMA,
CPP_TOKEN_FLD_NONE
};
 
/* A preprocessing token. This has been carefully packed and should
occupy 16 bytes on 32-bit hosts and 24 bytes on 64-bit hosts. */
struct cpp_token GTY(())
{
source_location src_loc; /* Location of first char of token. */
ENUM_BITFIELD(cpp_ttype) type : CHAR_BIT; /* token type */
unsigned char flags; /* flags - see above */
 
union cpp_token_u
{
/* An identifier. */
cpp_hashnode *
GTY ((nested_ptr (union tree_node,
"%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
"%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
tag ("CPP_TOKEN_FLD_NODE")))
node;
/* Inherit padding from this token. */
cpp_token * GTY ((tag ("CPP_TOKEN_FLD_SOURCE"))) source;
 
/* A string, or number. */
struct cpp_string GTY ((tag ("CPP_TOKEN_FLD_STR"))) str;
 
/* Argument no. for a CPP_MACRO_ARG. */
unsigned int GTY ((tag ("CPP_TOKEN_FLD_ARG_NO"))) arg_no;
 
/* Caller-supplied identifier for a CPP_PRAGMA. */
unsigned int GTY ((tag ("CPP_TOKEN_FLD_PRAGMA"))) pragma;
} GTY ((desc ("cpp_token_val_index (&%1)"))) val;
};
 
/* Say which field is in use. */
extern enum cpp_token_fld_kind cpp_token_val_index (cpp_token *tok);
 
/* A type wide enough to hold any multibyte source character.
cpplib's character constant interpreter requires an unsigned type.
Also, a typedef for the signed equivalent.
The width of this type is capped at 32 bits; there do exist targets
where wchar_t is 64 bits, but only in a non-default mode, and there
would be no meaningful interpretation for a wchar_t value greater
than 2^32 anyway -- the widest wide-character encoding around is
ISO 10646, which stops at 2^31. */
#if CHAR_BIT * SIZEOF_INT >= 32
# define CPPCHAR_SIGNED_T int
#elif CHAR_BIT * SIZEOF_LONG >= 32
# define CPPCHAR_SIGNED_T long
#else
# error "Cannot find a least-32-bit signed integer type"
#endif
typedef unsigned CPPCHAR_SIGNED_T cppchar_t;
typedef CPPCHAR_SIGNED_T cppchar_signed_t;
 
/* Style of header dependencies to generate. */
enum cpp_deps_style { DEPS_NONE = 0, DEPS_USER, DEPS_SYSTEM };
 
/* The possible normalization levels, from most restrictive to least. */
enum cpp_normalize_level {
/* In NFKC. */
normalized_KC = 0,
/* In NFC. */
normalized_C,
/* In NFC, except for subsequences where being in NFC would make
the identifier invalid. */
normalized_identifier_C,
/* Not normalized at all. */
normalized_none
};
 
/* This structure is nested inside struct cpp_reader, and
carries all the options visible to the command line. */
struct cpp_options
{
/* Characters between tab stops. */
unsigned int tabstop;
 
/* The language we're preprocessing. */
enum c_lang lang;
 
/* Nonzero means use extra default include directories for C++. */
unsigned char cplusplus;
 
/* Nonzero means handle cplusplus style comments. */
unsigned char cplusplus_comments;
 
/* Nonzero means define __OBJC__, treat @ as a special token, and
use the OBJC[PLUS]_INCLUDE_PATH environment variable. */
unsigned char objc;
 
/* Nonzero means don't copy comments into the output file. */
unsigned char discard_comments;
 
/* Nonzero means don't copy comments into the output file during
macro expansion. */
unsigned char discard_comments_in_macro_exp;
 
/* Nonzero means process the ISO trigraph sequences. */
unsigned char trigraphs;
 
/* Nonzero means process the ISO digraph sequences. */
unsigned char digraphs;
 
/* Nonzero means to allow hexadecimal floats and LL suffixes. */
unsigned char extended_numbers;
 
/* Nonzero means print names of header files (-H). */
unsigned char print_include_names;
 
/* Nonzero means cpp_pedwarn causes a hard error. */
unsigned char pedantic_errors;
 
/* Nonzero means don't print warning messages. */
unsigned char inhibit_warnings;
 
/* Nonzero means complain about deprecated features. */
unsigned char warn_deprecated;
 
/* Nonzero means don't suppress warnings from system headers. */
unsigned char warn_system_headers;
 
/* Nonzero means don't print error messages. Has no option to
select it, but can be set by a user of cpplib (e.g. fix-header). */
unsigned char inhibit_errors;
 
/* Nonzero means warn if slash-star appears in a comment. */
unsigned char warn_comments;
 
/* Nonzero means warn if a user-supplied include directory does not
exist. */
unsigned char warn_missing_include_dirs;
 
/* Nonzero means warn if there are any trigraphs. */
unsigned char warn_trigraphs;
 
/* Nonzero means warn about multicharacter charconsts. */
unsigned char warn_multichar;
 
/* Nonzero means warn about various incompatibilities with
traditional C. */
unsigned char warn_traditional;
 
/* Nonzero means warn about long long numeric constants. */
unsigned char warn_long_long;
 
/* Nonzero means warn about text after an #endif (or #else). */
unsigned char warn_endif_labels;
 
/* Nonzero means warn about implicit sign changes owing to integer
promotions. */
unsigned char warn_num_sign_change;
 
/* Zero means don't warn about __VA_ARGS__ usage in c89 pedantic mode.
Presumably the usage is protected by the appropriate #ifdef. */
unsigned char warn_variadic_macros;
 
/* Nonzero means turn warnings into errors. */
unsigned char warnings_are_errors;
 
/* Nonzero means we should look for header.gcc files that remap file
names. */
unsigned char remap;
 
/* Zero means dollar signs are punctuation. */
unsigned char dollars_in_ident;
 
/* Nonzero means UCNs are accepted in identifiers. */
unsigned char extended_identifiers;
 
/* True if we should warn about dollars in identifiers or numbers
for this translation unit. */
unsigned char warn_dollars;
 
/* Nonzero means warn if undefined identifiers are evaluated in an #if. */
unsigned char warn_undef;
 
/* Nonzero means warn of unused macros from the main file. */
unsigned char warn_unused_macros;
 
/* Nonzero for the 1999 C Standard, including corrigenda and amendments. */
unsigned char c99;
 
/* Nonzero if we are conforming to a specific C or C++ standard. */
unsigned char std;
 
/* Nonzero means give all the error messages the ANSI standard requires. */
unsigned char pedantic;
 
/* Nonzero means we're looking at already preprocessed code, so don't
bother trying to do macro expansion and whatnot. */
unsigned char preprocessed;
 
/* Print column number in error messages. */
unsigned char show_column;
 
/* Nonzero means handle C++ alternate operator names. */
unsigned char operator_names;
 
/* True for traditional preprocessing. */
unsigned char traditional;
 
/* Holds the name of the target (execution) character set. */
const char *narrow_charset;
 
/* Holds the name of the target wide character set. */
const char *wide_charset;
 
/* Holds the name of the input character set. */
const char *input_charset;
 
/* The minimum permitted level of normalization before a warning
is generated. */
enum cpp_normalize_level warn_normalize;
 
/* True to warn about precompiled header files we couldn't use. */
bool warn_invalid_pch;
 
/* True if dependencies should be restored from a precompiled header. */
bool restore_pch_deps;
 
/* Dependency generation. */
struct
{
/* Style of header dependencies to generate. */
enum cpp_deps_style style;
 
/* Assume missing files are generated files. */
bool missing_files;
 
/* Generate phony targets for each dependency apart from the first
one. */
bool phony_targets;
 
/* If true, no dependency is generated on the main file. */
bool ignore_main_file;
} deps;
 
/* Target-specific features set by the front end or client. */
 
/* Precision for target CPP arithmetic, target characters, target
ints and target wide characters, respectively. */
size_t precision, char_precision, int_precision, wchar_precision;
 
/* True means chars (wide chars) are unsigned. */
bool unsigned_char, unsigned_wchar;
 
/* True if the most significant byte in a word has the lowest
address in memory. */
bool bytes_big_endian;
 
/* Nonzero means __STDC__ should have the value 0 in system headers. */
unsigned char stdc_0_in_system_headers;
 
/* True means error callback should be used for diagnostics. */
bool client_diagnostic;
};
 
/* Callback for header lookup for HEADER, which is the name of a
source file. It is used as a method of last resort to find headers
that are not otherwise found during the normal include processing.
The return value is the malloced name of a header to try and open,
if any, or NULL otherwise. This callback is called only if the
header is otherwise unfound. */
typedef const char *(*missing_header_cb)(cpp_reader *, const char *header, cpp_dir **);
 
/* Call backs to cpplib client. */
struct cpp_callbacks
{
/* Called when a new line of preprocessed output is started. */
void (*line_change) (cpp_reader *, const cpp_token *, int);
 
/* Called when switching to/from a new file.
The line_map is for the new file. It is NULL if there is no new file.
(In C this happens when done with <built-in>+<command line> and also
when done with a main file.) This can be used for resource cleanup. */
void (*file_change) (cpp_reader *, const struct line_map *);
 
void (*dir_change) (cpp_reader *, const char *);
void (*include) (cpp_reader *, unsigned int, const unsigned char *,
const char *, int, const cpp_token **);
void (*define) (cpp_reader *, unsigned int, cpp_hashnode *);
void (*undef) (cpp_reader *, unsigned int, cpp_hashnode *);
void (*ident) (cpp_reader *, unsigned int, const cpp_string *);
void (*def_pragma) (cpp_reader *, unsigned int);
int (*valid_pch) (cpp_reader *, const char *, int);
void (*read_pch) (cpp_reader *, const char *, int, const char *);
missing_header_cb missing_header;
 
/* Called to emit a diagnostic if client_diagnostic option is true.
This callback receives the translated message. */
void (*error) (cpp_reader *, int, const char *, va_list *)
ATTRIBUTE_FPTR_PRINTF(3,0);
};
 
/* Chain of directories to look for include files in. */
struct cpp_dir
{
/* NULL-terminated singly-linked list. */
struct cpp_dir *next;
 
/* NAME of the directory, NUL-terminated. */
char *name;
unsigned int len;
 
/* One if a system header, two if a system header that has extern
"C" guards for C++. */
unsigned char sysp;
 
/* Mapping of file names for this directory for MS-DOS and related
platforms. A NULL-terminated array of (from, to) pairs. */
const char **name_map;
 
/* Routine to construct pathname, given the search path name and the
HEADER we are trying to find, return a constructed pathname to
try and open. If this is NULL, the constructed pathname is as
constructed by append_file_to_dir. */
char *(*construct) (const char *header, cpp_dir *dir);
 
/* The C front end uses these to recognize duplicated
directories in the search path. */
ino_t ino;
dev_t dev;
 
/* Is this a user-supplied directory? */
bool user_supplied_p;
};
 
/* Name under which this program was invoked. */
extern const char *progname;
 
/* The structure of a node in the hash table. The hash table has
entries for all identifiers: either macros defined by #define
commands (type NT_MACRO), assertions created with #assert
(NT_ASSERTION), or neither of the above (NT_VOID). Builtin macros
like __LINE__ are flagged NODE_BUILTIN. Poisoned identifiers are
flagged NODE_POISONED. NODE_OPERATOR (C++ only) indicates an
identifier that behaves like an operator such as "xor".
NODE_DIAGNOSTIC is for speed in lex_token: it indicates a
diagnostic may be required for this node. Currently this only
applies to __VA_ARGS__ and poisoned identifiers. */
 
/* Hash node flags. */
#define NODE_OPERATOR (1 << 0) /* C++ named operator. */
#define NODE_POISONED (1 << 1) /* Poisoned identifier. */
#define NODE_BUILTIN (1 << 2) /* Builtin macro. */
#define NODE_DIAGNOSTIC (1 << 3) /* Possible diagnostic when lexed. */
#define NODE_WARN (1 << 4) /* Warn if redefined or undefined. */
#define NODE_DISABLED (1 << 5) /* A disabled macro. */
#define NODE_MACRO_ARG (1 << 6) /* Used during #define processing. */
 
/* Different flavors of hash node. */
enum node_type
{
NT_VOID = 0, /* No definition yet. */
NT_MACRO, /* A macro of some form. */
NT_ASSERTION /* Predicate for #assert. */
};
 
/* Different flavors of builtin macro. _Pragma is an operator, but we
handle it with the builtin code for efficiency reasons. */
enum builtin_type
{
BT_SPECLINE = 0, /* `__LINE__' */
BT_DATE, /* `__DATE__' */
BT_FILE, /* `__FILE__' */
BT_BASE_FILE, /* `__BASE_FILE__' */
BT_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
BT_TIME, /* `__TIME__' */
BT_STDC, /* `__STDC__' */
BT_PRAGMA, /* `_Pragma' operator */
BT_TIMESTAMP /* `__TIMESTAMP__' */
};
 
#define CPP_HASHNODE(HNODE) ((cpp_hashnode *) (HNODE))
#define HT_NODE(NODE) ((ht_identifier *) (NODE))
#define NODE_LEN(NODE) HT_LEN (&(NODE)->ident)
#define NODE_NAME(NODE) HT_STR (&(NODE)->ident)
 
/* Specify which field, if any, of the union is used. */
 
enum {
NTV_MACRO,
NTV_ANSWER,
NTV_BUILTIN,
NTV_ARGUMENT,
NTV_NONE
};
 
#define CPP_HASHNODE_VALUE_IDX(HNODE) \
((HNODE.flags & NODE_MACRO_ARG) ? NTV_ARGUMENT \
: HNODE.type == NT_MACRO ? ((HNODE.flags & NODE_BUILTIN) \
? NTV_BUILTIN : NTV_MACRO) \
: HNODE.type == NT_ASSERTION ? NTV_ANSWER \
: NTV_NONE)
 
/* The common part of an identifier node shared amongst all 3 C front
ends. Also used to store CPP identifiers, which are a superset of
identifiers in the grammatical sense. */
 
union _cpp_hashnode_value GTY(())
{
/* If a macro. */
cpp_macro * GTY((tag ("NTV_MACRO"))) macro;
/* Answers to an assertion. */
struct answer * GTY ((tag ("NTV_ANSWER"))) answers;
/* Code for a builtin macro. */
enum builtin_type GTY ((tag ("NTV_BUILTIN"))) builtin;
/* Macro argument index. */
unsigned short GTY ((tag ("NTV_ARGUMENT"))) arg_index;
};
 
struct cpp_hashnode GTY(())
{
struct ht_identifier ident;
unsigned int is_directive : 1;
unsigned int directive_index : 7; /* If is_directive,
then index into directive table.
Otherwise, a NODE_OPERATOR. */
unsigned char rid_code; /* Rid code - for front ends. */
ENUM_BITFIELD(node_type) type : 8; /* CPP node type. */
unsigned char flags; /* CPP flags. */
 
union _cpp_hashnode_value GTY ((desc ("CPP_HASHNODE_VALUE_IDX (%1)"))) value;
};
 
/* Call this first to get a handle to pass to other functions.
 
If you want cpplib to manage its own hashtable, pass in a NULL
pointer. Otherwise you should pass in an initialized hash table
that cpplib will share; this technique is used by the C front
ends. */
extern cpp_reader *cpp_create_reader (enum c_lang, struct ht *,
struct line_maps *);
 
/* Call this to change the selected language standard (e.g. because of
command line options). */
extern void cpp_set_lang (cpp_reader *, enum c_lang);
 
/* Set the include paths. */
extern void cpp_set_include_chains (cpp_reader *, cpp_dir *, cpp_dir *, int);
 
/* Call these to get pointers to the options, callback, and deps
structures for a given reader. These pointers are good until you
call cpp_finish on that reader. You can either edit the callbacks
through the pointer returned from cpp_get_callbacks, or set them
with cpp_set_callbacks. */
extern cpp_options *cpp_get_options (cpp_reader *);
extern cpp_callbacks *cpp_get_callbacks (cpp_reader *);
extern void cpp_set_callbacks (cpp_reader *, cpp_callbacks *);
extern struct deps *cpp_get_deps (cpp_reader *);
 
/* This function reads the file, but does not start preprocessing. It
returns the name of the original file; this is the same as the
input file, except for preprocessed input. This will generate at
least one file change callback, and possibly a line change callback
too. If there was an error opening the file, it returns NULL. */
extern const char *cpp_read_main_file (cpp_reader *, const char *);
 
/* Set up built-ins like __FILE__. */
extern void cpp_init_builtins (cpp_reader *, int);
 
/* This is called after options have been parsed, and partially
processed. */
extern void cpp_post_options (cpp_reader *);
 
/* Set up translation to the target character set. */
extern void cpp_init_iconv (cpp_reader *);
 
/* Call this to finish preprocessing. If you requested dependency
generation, pass an open stream to write the information to,
otherwise NULL. It is your responsibility to close the stream.
 
Returns cpp_errors (pfile). */
extern int cpp_finish (cpp_reader *, FILE *deps_stream);
 
/* Call this to release the handle at the end of preprocessing. Any
use of the handle after this function returns is invalid. Returns
cpp_errors (pfile). */
extern void cpp_destroy (cpp_reader *);
 
/* Error count. */
extern unsigned int cpp_errors (cpp_reader *);
 
extern unsigned int cpp_token_len (const cpp_token *);
extern unsigned char *cpp_token_as_text (cpp_reader *, const cpp_token *);
extern unsigned char *cpp_spell_token (cpp_reader *, const cpp_token *,
unsigned char *, bool);
extern void cpp_register_pragma (cpp_reader *, const char *, const char *,
void (*) (cpp_reader *), bool);
extern void cpp_register_deferred_pragma (cpp_reader *, const char *,
const char *, unsigned, bool, bool);
extern int cpp_avoid_paste (cpp_reader *, const cpp_token *,
const cpp_token *);
extern const cpp_token *cpp_get_token (cpp_reader *);
extern const unsigned char *cpp_macro_definition (cpp_reader *,
const cpp_hashnode *);
extern void _cpp_backup_tokens (cpp_reader *, unsigned int);
 
/* Evaluate a CPP_CHAR or CPP_WCHAR token. */
extern cppchar_t cpp_interpret_charconst (cpp_reader *, const cpp_token *,
unsigned int *, int *);
/* Evaluate a vector of CPP_STRING or CPP_WSTRING tokens. */
extern bool cpp_interpret_string (cpp_reader *,
const cpp_string *, size_t,
cpp_string *, bool);
extern bool cpp_interpret_string_notranslate (cpp_reader *,
const cpp_string *, size_t,
cpp_string *, bool);
 
/* Convert a host character constant to the execution character set. */
extern cppchar_t cpp_host_to_exec_charset (cpp_reader *, cppchar_t);
 
/* Used to register macros and assertions, perhaps from the command line.
The text is the same as the command line argument. */
extern void cpp_define (cpp_reader *, const char *);
extern void cpp_assert (cpp_reader *, const char *);
extern void cpp_undef (cpp_reader *, const char *);
extern void cpp_unassert (cpp_reader *, const char *);
 
/* Undefine all macros and assertions. */
extern void cpp_undef_all (cpp_reader *);
 
extern cpp_buffer *cpp_push_buffer (cpp_reader *, const unsigned char *,
size_t, int);
extern int cpp_defined (cpp_reader *, const unsigned char *, int);
 
/* A preprocessing number. Code assumes that any unused high bits of
the double integer are set to zero. */
typedef unsigned HOST_WIDE_INT cpp_num_part;
typedef struct cpp_num cpp_num;
struct cpp_num
{
cpp_num_part high;
cpp_num_part low;
bool unsignedp; /* True if value should be treated as unsigned. */
bool overflow; /* True if the most recent calculation overflowed. */
};
 
/* cpplib provides two interfaces for interpretation of preprocessing
numbers.
 
cpp_classify_number categorizes numeric constants according to
their field (integer, floating point, or invalid), radix (decimal,
octal, hexadecimal), and type suffixes. */
 
#define CPP_N_CATEGORY 0x000F
#define CPP_N_INVALID 0x0000
#define CPP_N_INTEGER 0x0001
#define CPP_N_FLOATING 0x0002
 
#define CPP_N_WIDTH 0x00F0
#define CPP_N_SMALL 0x0010 /* int, float. */
#define CPP_N_MEDIUM 0x0020 /* long, double. */
#define CPP_N_LARGE 0x0040 /* long long, long double. */
 
#define CPP_N_RADIX 0x0F00
#define CPP_N_DECIMAL 0x0100
#define CPP_N_HEX 0x0200
#define CPP_N_OCTAL 0x0400
 
#define CPP_N_UNSIGNED 0x1000 /* Properties. */
#define CPP_N_IMAGINARY 0x2000
#define CPP_N_DFLOAT 0x4000
 
/* Classify a CPP_NUMBER token. The return value is a combination of
the flags from the above sets. */
extern unsigned cpp_classify_number (cpp_reader *, const cpp_token *);
 
/* Evaluate a token classified as category CPP_N_INTEGER. */
extern cpp_num cpp_interpret_integer (cpp_reader *, const cpp_token *,
unsigned int type);
 
/* Sign extend a number, with PRECISION significant bits and all
others assumed clear, to fill out a cpp_num structure. */
cpp_num cpp_num_sign_extend (cpp_num, size_t);
 
/* Diagnostic levels. To get a diagnostic without associating a
position in the translation unit with it, use cpp_error_with_line
with a line number of zero. */
 
/* Warning, an error with -Werror. */
#define CPP_DL_WARNING 0x00
/* Same as CPP_DL_WARNING, except it is not suppressed in system headers. */
#define CPP_DL_WARNING_SYSHDR 0x01
/* Warning, an error with -pedantic-errors or -Werror. */
#define CPP_DL_PEDWARN 0x02
/* An error. */
#define CPP_DL_ERROR 0x03
/* An internal consistency check failed. Prints "internal error: ",
otherwise the same as CPP_DL_ERROR. */
#define CPP_DL_ICE 0x04
/* Extracts a diagnostic level from an int. */
#define CPP_DL_EXTRACT(l) (l & 0xf)
/* Nonzero if a diagnostic level is one of the warnings. */
#define CPP_DL_WARNING_P(l) (CPP_DL_EXTRACT (l) >= CPP_DL_WARNING \
&& CPP_DL_EXTRACT (l) <= CPP_DL_PEDWARN)
 
/* Output a diagnostic of some kind. */
extern void cpp_error (cpp_reader *, int, const char *msgid, ...)
ATTRIBUTE_PRINTF_3;
 
/* Output a diagnostic with "MSGID: " preceding the
error string of errno. No location is printed. */
extern void cpp_errno (cpp_reader *, int, const char *msgid);
 
/* Same as cpp_error, except additionally specifies a position as a
(translation unit) physical line and physical column. If the line is
zero, then no location is printed. */
extern void cpp_error_with_line (cpp_reader *, int, source_location, unsigned,
const char *msgid, ...) ATTRIBUTE_PRINTF_5;
 
/* In cpplex.c */
extern int cpp_ideq (const cpp_token *, const char *);
extern void cpp_output_line (cpp_reader *, FILE *);
extern void cpp_output_token (const cpp_token *, FILE *);
extern const char *cpp_type2name (enum cpp_ttype);
/* Returns the value of an escape sequence, truncated to the correct
target precision. PSTR points to the input pointer, which is just
after the backslash. LIMIT is how much text we have. WIDE is true
if the escape sequence is part of a wide character constant or
string literal. Handles all relevant diagnostics. */
extern cppchar_t cpp_parse_escape (cpp_reader *, const unsigned char ** pstr,
const unsigned char *limit, int wide);
 
/* In cpphash.c */
 
/* Lookup an identifier in the hashtable. Puts the identifier in the
table if it is not already there. */
extern cpp_hashnode *cpp_lookup (cpp_reader *, const unsigned char *,
unsigned int);
 
typedef int (*cpp_cb) (cpp_reader *, cpp_hashnode *, void *);
extern void cpp_forall_identifiers (cpp_reader *, cpp_cb, void *);
 
/* In cppmacro.c */
extern void cpp_scan_nooutput (cpp_reader *);
extern int cpp_sys_macro_p (cpp_reader *);
extern unsigned char *cpp_quote_string (unsigned char *, const unsigned char *,
unsigned int);
 
/* In cppfiles.c */
extern bool cpp_included (cpp_reader *, const char *);
extern void cpp_make_system_header (cpp_reader *, int, int);
extern bool cpp_push_include (cpp_reader *, const char *);
extern void cpp_change_file (cpp_reader *, enum lc_reason, const char *);
extern const char *cpp_get_path (struct _cpp_file *);
extern cpp_dir *cpp_get_dir (struct _cpp_file *);
extern cpp_buffer *cpp_get_buffer (cpp_reader *);
extern struct _cpp_file *cpp_get_file (cpp_buffer *);
extern cpp_buffer *cpp_get_prev (cpp_buffer *);
 
/* In cpppch.c */
struct save_macro_data;
extern int cpp_save_state (cpp_reader *, FILE *);
extern int cpp_write_pch_deps (cpp_reader *, FILE *);
extern int cpp_write_pch_state (cpp_reader *, FILE *);
extern int cpp_valid_state (cpp_reader *, const char *, int);
extern void cpp_prepare_state (cpp_reader *, struct save_macro_data **);
extern int cpp_read_state (cpp_reader *, const char *, FILE *,
struct save_macro_data *);
 
#ifdef __cplusplus
}
#endif
 
#endif /* ! LIBCPP_CPPLIB_H */
/symtab.h
0,0 → 1,96
/* Hash tables.
Copyright (C) 2000, 2001, 2003, 2004 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
 
#ifndef LIBCPP_SYMTAB_H
#define LIBCPP_SYMTAB_H
 
#include "obstack.h"
#define GTY(x) /* nothing */
 
/* This is what each hash table entry points to. It may be embedded
deeply within another object. */
typedef struct ht_identifier ht_identifier;
struct ht_identifier GTY(())
{
const unsigned char *str;
unsigned int len;
unsigned int hash_value;
};
 
#define HT_LEN(NODE) ((NODE)->len)
#define HT_STR(NODE) ((NODE)->str)
 
typedef struct ht hash_table;
typedef struct ht_identifier *hashnode;
 
enum ht_lookup_option {HT_NO_INSERT = 0, HT_ALLOC, HT_ALLOCED};
 
/* An identifier hash table for cpplib and the front ends. */
struct ht
{
/* Identifiers are allocated from here. */
struct obstack stack;
 
hashnode *entries;
/* Call back, allocate a node. */
hashnode (*alloc_node) (hash_table *);
/* Call back, allocate something that hangs off a node like a cpp_macro.
NULL means use the usual allocator. */
void * (*alloc_subobject) (size_t);
 
unsigned int nslots; /* Total slots in the entries array. */
unsigned int nelements; /* Number of live elements. */
 
/* Link to reader, if any. For the benefit of cpplib. */
struct cpp_reader *pfile;
 
/* Table usage statistics. */
unsigned int searches;
unsigned int collisions;
 
/* Should 'entries' be freed when it is no longer needed? */
bool entries_owned;
};
 
/* Initialize the hashtable with 2 ^ order entries. */
extern hash_table *ht_create (unsigned int order);
 
/* Frees all memory associated with a hash table. */
extern void ht_destroy (hash_table *);
 
extern hashnode ht_lookup (hash_table *, const unsigned char *,
size_t, enum ht_lookup_option);
extern hashnode ht_lookup_with_hash (hash_table *, const unsigned char *,
size_t, unsigned int,
enum ht_lookup_option);
#define HT_HASHSTEP(r, c) ((r) * 67 + ((c) - 113));
#define HT_HASHFINISH(r, len) ((r) + (len))
 
/* For all nodes in TABLE, make a callback. The callback takes
TABLE->PFILE, the node, and a PTR, and the callback sequence stops
if the callback returns zero. */
typedef int (*ht_cb) (struct cpp_reader *, hashnode, const void *);
extern void ht_forall (hash_table *, ht_cb, const void *);
 
/* Restore the hash table. */
extern void ht_load (hash_table *ht, hashnode *entries,
unsigned int nslots, unsigned int nelements, bool own);
 
/* Dump allocation statistics to stderr. */
extern void ht_dump_statistics (hash_table *);
 
#endif /* LIBCPP_SYMTAB_H */
/line-map.h
0,0 → 1,180
/* Map logical line numbers to (source file, line number) pairs.
Copyright (C) 2001, 2003, 2004
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding! */
 
#ifndef LIBCPP_LINE_MAP_H
#define LIBCPP_LINE_MAP_H
 
/* Reason for adding a line change with add_line_map (). LC_ENTER is
when including a new file, e.g. a #include directive in C.
LC_LEAVE is when reaching a file's end. LC_RENAME is when a file
name or line number changes for neither of the above reasons
(e.g. a #line directive in C). */
enum lc_reason {LC_ENTER = 0, LC_LEAVE, LC_RENAME};
 
/* A logical line/column number, i.e. an "index" into a line_map. */
/* Long-term, we want to use this to replace struct location_s (in input.h),
and effectively typedef source_location location_t. */
typedef unsigned int source_location;
 
/* Physical source file TO_FILE at line TO_LINE at column 0 is represented
by the logical START_LOCATION. TO_LINE+L at column C is represented by
START_LOCATION+(L*(1<<column_bits))+C, as long as C<(1<<column_bits),
and the result_location is less than the next line_map's start_location.
(The top line is line 1 and the leftmost column is column 1; line/column 0
means "entire file/line" or "unknown line/column" or "not applicable".)
INCLUDED_FROM is an index into the set that gives the line mapping
at whose end the current one was included. File(s) at the bottom
of the include stack have this set to -1. REASON is the reason for
creation of this line map, SYSP is one for a system header, two for
a C system header file that therefore needs to be extern "C"
protected in C++, and zero otherwise. */
struct line_map
{
const char *to_file;
unsigned int to_line;
source_location start_location;
int included_from;
ENUM_BITFIELD (lc_reason) reason : CHAR_BIT;
/* The sysp field isn't really needed now that it's in cpp_buffer. */
unsigned char sysp;
/* Number of the low-order source_location bits used for a column number. */
unsigned int column_bits : 8;
};
 
/* A set of chronological line_map structures. */
struct line_maps
{
struct line_map *maps;
unsigned int allocated;
unsigned int used;
 
unsigned int cache;
 
/* The most recently listed include stack, if any, starts with
LAST_LISTED as the topmost including file. -1 indicates nothing
has been listed yet. */
int last_listed;
 
/* Depth of the include stack, including the current file. */
unsigned int depth;
 
/* If true, prints an include trace a la -H. */
bool trace_includes;
 
/* Highest source_location "given out". */
source_location highest_location;
 
/* Start of line of highest source_location "given out". */
source_location highest_line;
 
/* The maximum column number we can quickly allocate. Higher numbers
may require allocating a new line_map. */
unsigned int max_column_hint;
};
 
/* Initialize a line map set. */
extern void linemap_init (struct line_maps *);
 
/* Free a line map set. */
extern void linemap_free (struct line_maps *);
 
/* Check for and warn about line_maps entered but not exited. */
 
extern void linemap_check_files_exited (struct line_maps *);
 
/* Return a source_location for the start (i.e. column==0) of
(physical) line TO_LINE in the current source file (as in the
most recent linemap_add). MAX_COLUMN_HINT is the highest column
number we expect to use in this line (but it does not change
the highest_location). */
 
extern source_location linemap_line_start
(struct line_maps *set, unsigned int to_line, unsigned int max_column_hint);
 
/* Add a mapping of logical source line to physical source file and
line number.
 
The text pointed to by TO_FILE must have a lifetime
at least as long as the final call to lookup_line (). An empty
TO_FILE means standard input. If reason is LC_LEAVE, and
TO_FILE is NULL, then TO_FILE, TO_LINE and SYSP are given their
natural values considering the file we are returning to.
 
A call to this function can relocate the previous set of
maps, so any stored line_map pointers should not be used. */
extern const struct line_map *linemap_add
(struct line_maps *, enum lc_reason, unsigned int sysp,
const char *to_file, unsigned int to_line);
 
/* Given a logical line, returns the map from which the corresponding
(source file, line) pair can be deduced. */
extern const struct line_map *linemap_lookup
(struct line_maps *, source_location);
 
/* Print the file names and line numbers of the #include commands
which led to the map MAP, if any, to stderr. Nothing is output if
the most recently listed stack is the same as the current one. */
extern void linemap_print_containing_files (struct line_maps *,
const struct line_map *);
 
/* Converts a map and a source_location to source line. */
#define SOURCE_LINE(MAP, LINE) \
((((LINE) - (MAP)->start_location) >> (MAP)->column_bits) + (MAP)->to_line)
 
#define SOURCE_COLUMN(MAP, LINE) \
(((LINE) - (MAP)->start_location) & ((1 << (MAP)->column_bits) - 1))
 
/* Returns the last source line within a map. This is the (last) line
of the #include, or other directive, that caused a map change. */
#define LAST_SOURCE_LINE(MAP) \
SOURCE_LINE (MAP, LAST_SOURCE_LINE_LOCATION (MAP))
#define LAST_SOURCE_LINE_LOCATION(MAP) \
((((MAP)[1].start_location - 1 - (MAP)->start_location) \
& ~((1 << (MAP)->column_bits) - 1)) \
+ (MAP)->start_location)
 
/* Returns the map a given map was included from. */
#define INCLUDED_FROM(SET, MAP) (&(SET)->maps[(MAP)->included_from])
 
/* Nonzero if the map is at the bottom of the include stack. */
#define MAIN_FILE_P(MAP) ((MAP)->included_from < 0)
 
/* Set LOC to a source position that is the same line as the most recent
linemap_line_start, but with the specified TO_COLUMN column number. */
 
#define LINEMAP_POSITION_FOR_COLUMN(LOC, SET, TO_COLUMN) { \
unsigned int to_column = (TO_COLUMN); \
struct line_maps *set = (SET); \
if (__builtin_expect (to_column >= set->max_column_hint, 0)) \
(LOC) = linemap_position_for_column (set, to_column); \
else { \
source_location r = set->highest_line; \
r = r + to_column; \
if (r >= set->highest_location) \
set->highest_location = r; \
(LOC) = r; \
}}
 
extern source_location
linemap_position_for_column (struct line_maps *set, unsigned int to_column);
#endif /* !LIBCPP_LINE_MAP_H */
/cpp-id-data.h
0,0 → 1,78
/* Structures that hang off cpp_identifier, for PCH.
Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
1999, 2000, 2001, 2002, 2003, 2004 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
 
#include "cpplib.h"
 
#if !defined (HAVE_UCHAR) && !defined (IN_GCC)
typedef unsigned char uchar;
#endif
 
#define U (const unsigned char *) /* Intended use: U"string" */
 
/* Chained list of answers to an assertion. */
struct answer GTY(())
{
struct answer *next;
unsigned int count;
cpp_token GTY ((length ("%h.count"))) first[1];
};
 
/* Each macro definition is recorded in a cpp_macro structure.
Variadic macros cannot occur with traditional cpp. */
struct cpp_macro GTY(())
{
/* Parameters, if any. */
cpp_hashnode ** GTY ((nested_ptr (union tree_node,
"%h ? CPP_HASHNODE (GCC_IDENT_TO_HT_IDENT (%h)) : NULL",
"%h ? HT_IDENT_TO_GCC_IDENT (HT_NODE (%h)) : NULL"),
length ("%h.paramc")))
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_macro_u
{
cpp_token * GTY ((tag ("0"), length ("%0.count"))) tokens;
const unsigned char * GTY ((tag ("1"))) text;
} GTY ((desc ("%1.traditional"))) exp;
 
/* Definition line number. */
source_location 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;
 
/* Indicate which field of 'exp' is in use. */
unsigned int traditional : 1;
};
/mkdeps.h
0,0 → 1,79
/* Dependency generator for Makefile fragments.
Copyright (C) 2000, 2001, 2003 Free Software Foundation, Inc.
Contributed by Zack Weinberg, Mar 2000
 
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 
In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them. Help stamp out software-hoarding! */
 
#ifndef LIBCPP_MKDEPS_H
#define LIBCPP_MKDEPS_H
 
/* This is the data structure used by all the functions in mkdeps.c.
It's quite straightforward, but should be treated as opaque. */
 
struct deps;
 
/* Create a deps buffer. */
extern struct deps *deps_init (void);
 
/* Destroy a deps buffer. */
extern void deps_free (struct deps *);
 
/* Add a set of "vpath" directories. The second argument is a colon-
separated list of pathnames, like you would set Make's VPATH
variable to. If a dependency or target name begins with any of
these pathnames (and the next path element is not "..") that
pathname is stripped off. */
extern void deps_add_vpath (struct deps *, const char *);
 
/* Add a target (appears on left side of the colon) to the deps list. Takes
a boolean indicating whether to quote the target for MAKE. */
extern void deps_add_target (struct deps *, const char *, int);
 
/* Sets the default target if none has been given already. An empty
string as the default target is interpreted as stdin. */
extern void deps_add_default_target (struct deps *, const char *);
 
/* Add a dependency (appears on the right side of the colon) to the
deps list. Dependencies will be printed in the order that they
were entered with this function. By convention, the first
dependency entered should be the primary source file. */
extern void deps_add_dep (struct deps *, const char *);
 
/* Write out a deps buffer to a specified file. The third argument
is the number of columns to word-wrap at (0 means don't wrap). */
extern void deps_write (const struct deps *, FILE *, unsigned int);
 
/* Write out a deps buffer to a file, in a form that can be read back
with deps_restore. Returns nonzero on error, in which case the
error number will be in errno. */
extern int deps_save (struct deps *, FILE *);
 
/* Read back dependency information written with deps_save into
the deps buffer. The third argument may be NULL, in which case
the dependency information is just skipped, or it may be a filename,
in which case that filename is skipped. */
extern int deps_restore (struct deps *, FILE *, const char *);
 
/* For each dependency *except the first*, emit a dummy rule for that
file, causing it to depend on nothing. This is used to work around
the intermediate-file deletion misfeature in Make, in some
automatic dependency schemes. */
extern void deps_phony_targets (const struct deps *, FILE *);
 
#endif /* ! LIBCPP_MKDEPS_H */

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