490 lines
16 KiB
C
490 lines
16 KiB
C
/* Part of CPP library.
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002
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Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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/* This header defines all the internal data structures and functions
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that need to be visible across files. It's called cpphash.h for
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historical reasons. */
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#ifndef GCC_CPPHASH_H
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#define GCC_CPPHASH_H
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#include "hashtable.h"
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struct directive; /* Deliberately incomplete. */
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/* Test if a sign is valid within a preprocessing number. */
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#define VALID_SIGN(c, prevc) \
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(((c) == '+' || (c) == '-') && \
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((prevc) == 'e' || (prevc) == 'E' \
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|| (((prevc) == 'p' || (prevc) == 'P') \
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&& CPP_OPTION (pfile, extended_numbers))))
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#define CPP_OPTION(PFILE, OPTION) ((PFILE)->opts.OPTION)
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#define CPP_BUFFER(PFILE) ((PFILE)->buffer)
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#define CPP_BUF_COLUMN(BUF, CUR) ((CUR) - (BUF)->line_base + (BUF)->col_adjust)
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#define CPP_BUF_COL(BUF) CPP_BUF_COLUMN(BUF, (BUF)->cur)
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/* Maximum nesting of cpp_buffers. We use a static limit, partly for
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efficiency, and partly to limit runaway recursion. */
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#define CPP_STACK_MAX 200
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/* A generic memory buffer, and operations on it. */
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typedef struct _cpp_buff _cpp_buff;
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struct _cpp_buff
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{
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struct _cpp_buff *next;
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unsigned char *base, *cur, *limit;
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};
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extern _cpp_buff *_cpp_get_buff PARAMS ((cpp_reader *, size_t));
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extern void _cpp_release_buff PARAMS ((cpp_reader *, _cpp_buff *));
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extern void _cpp_extend_buff PARAMS ((cpp_reader *, _cpp_buff **, size_t));
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extern _cpp_buff *_cpp_append_extend_buff PARAMS ((cpp_reader *, _cpp_buff *,
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size_t));
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extern void _cpp_free_buff PARAMS ((_cpp_buff *));
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extern unsigned char *_cpp_aligned_alloc PARAMS ((cpp_reader *, size_t));
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extern unsigned char *_cpp_unaligned_alloc PARAMS ((cpp_reader *, size_t));
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#define BUFF_ROOM(BUFF) (size_t) ((BUFF)->limit - (BUFF)->cur)
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#define BUFF_FRONT(BUFF) ((BUFF)->cur)
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#define BUFF_LIMIT(BUFF) ((BUFF)->limit)
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/* List of directories to look for include files in. */
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struct search_path
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{
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struct search_path *next;
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/* NOTE: NAME may not be null terminated for the case of the current
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file's directory! */
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const char *name;
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unsigned int len;
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/* We use these to tell if the directory mentioned here is a duplicate
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of an earlier directory on the search path. */
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ino_t ino;
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dev_t dev;
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/* Non-zero if it is a system include directory. */
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int sysp;
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/* Mapping of file names for this directory. Only used on MS-DOS
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and related platforms. */
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struct file_name_map *name_map;
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};
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/* #include types. */
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enum include_type {IT_INCLUDE, IT_INCLUDE_NEXT, IT_IMPORT, IT_CMDLINE};
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union utoken
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{
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const cpp_token *token;
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const cpp_token **ptoken;
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};
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/* A "run" of tokens; part of a chain of runs. */
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typedef struct tokenrun tokenrun;
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struct tokenrun
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{
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tokenrun *next, *prev;
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cpp_token *base, *limit;
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};
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typedef struct cpp_context cpp_context;
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struct cpp_context
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{
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/* Doubly-linked list. */
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cpp_context *next, *prev;
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/* Contexts other than the base context are contiguous tokens.
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e.g. macro expansions, expanded argument tokens. */
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union utoken first;
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union utoken last;
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/* If non-NULL, a buffer used for storage related to this context.
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When the context is popped, the buffer is released. */
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_cpp_buff *buff;
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/* For a macro context, the macro node, otherwise NULL. */
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cpp_hashnode *macro;
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/* True if utoken element is token, else ptoken. */
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bool direct_p;
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};
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struct lexer_state
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{
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/* Nonzero if first token on line is CPP_HASH. */
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unsigned char in_directive;
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/* True if we are skipping a failed conditional group. */
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unsigned char skipping;
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/* Nonzero if in a directive that takes angle-bracketed headers. */
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unsigned char angled_headers;
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/* Nonzero to save comments. Turned off if discard_comments, and in
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all directives apart from #define. */
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unsigned char save_comments;
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/* Nonzero if we're mid-comment. */
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unsigned char lexing_comment;
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/* Nonzero if lexing __VA_ARGS__ is valid. */
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unsigned char va_args_ok;
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/* Nonzero if lexing poisoned identifiers is valid. */
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unsigned char poisoned_ok;
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/* Nonzero to prevent macro expansion. */
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unsigned char prevent_expansion;
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/* Nonzero when parsing arguments to a function-like macro. */
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unsigned char parsing_args;
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/* Nonzero when in a # NUMBER directive. */
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unsigned char line_extension;
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};
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/* Special nodes - identifiers with predefined significance. */
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struct spec_nodes
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{
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cpp_hashnode *n_defined; /* defined operator */
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cpp_hashnode *n_true; /* C++ keyword true */
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cpp_hashnode *n_false; /* C++ keyword false */
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cpp_hashnode *n__STRICT_ANSI__; /* STDC_0_IN_SYSTEM_HEADERS */
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cpp_hashnode *n__CHAR_UNSIGNED__; /* plain char is unsigned */
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cpp_hashnode *n__VA_ARGS__; /* C99 vararg macros */
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};
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/* Represents the contents of a file cpplib has read in. */
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struct cpp_buffer
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{
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const unsigned char *cur; /* current position */
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const unsigned char *backup_to; /* if peeked character is not wanted */
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const unsigned char *rlimit; /* end of valid data */
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const unsigned char *line_base; /* start of current line */
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struct cpp_buffer *prev;
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const unsigned char *buf; /* Entire character buffer. */
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/* Pointer into the include table; non-NULL if this is a file
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buffer. Used for include_next and to record control macros. */
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struct include_file *inc;
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/* Value of if_stack at start of this file.
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Used to prohibit unmatched #endif (etc) in an include file. */
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struct if_stack *if_stack;
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/* Token column position adjustment owing to tabs in whitespace. */
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unsigned int col_adjust;
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/* Contains PREV_WHITE and/or AVOID_LPASTE. */
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unsigned char saved_flags;
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/* Because of the way the lexer works, -Wtrigraphs can sometimes
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warn twice for the same trigraph. This helps prevent that. */
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const unsigned char *last_Wtrigraphs;
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/* True if we have already warned about C++ comments in this file.
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The warning happens only for C89 extended mode with -pedantic on,
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or for -Wtraditional, and only once per file (otherwise it would
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be far too noisy). */
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unsigned char warned_cplusplus_comments;
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/* True if we don't process trigraphs and escaped newlines. True
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for preprocessed input, command line directives, and _Pragma
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buffers. */
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unsigned char from_stage3;
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/* Nonzero means that the directory to start searching for ""
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include files has been calculated and stored in "dir" below. */
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unsigned char search_cached;
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/* At EOF, a buffer is automatically popped. If RETURN_AT_EOF is
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true, a CPP_EOF token is then returned. Otherwise, the next
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token from the enclosing buffer is returned. */
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bool return_at_eof;
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/* The directory of the this buffer's file. Its NAME member is not
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allocated, so we don't need to worry about freeing it. */
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struct search_path dir;
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};
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/* A cpp_reader encapsulates the "state" of a pre-processor run.
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Applying cpp_get_token repeatedly yields a stream of pre-processor
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tokens. Usually, there is only one cpp_reader object active. */
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struct cpp_reader
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{
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/* Top of buffer stack. */
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cpp_buffer *buffer;
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/* Lexer state. */
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struct lexer_state state;
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/* Source line tracking. */
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struct line_maps line_maps;
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const struct line_map *map;
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unsigned int line;
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/* The line of the '#' of the current directive. */
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unsigned int directive_line;
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/* Memory buffers. */
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_cpp_buff *a_buff; /* Aligned permanent storage. */
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_cpp_buff *u_buff; /* Unaligned permanent storage. */
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_cpp_buff *free_buffs; /* Free buffer chain. */
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/* Context stack. */
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struct cpp_context base_context;
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struct cpp_context *context;
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/* If in_directive, the directive if known. */
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const struct directive *directive;
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/* Multiple inlcude optimisation. */
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const cpp_hashnode *mi_cmacro;
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const cpp_hashnode *mi_ind_cmacro;
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bool mi_valid;
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/* Lexing. */
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cpp_token *cur_token;
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tokenrun base_run, *cur_run;
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unsigned int lookaheads;
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/* Non-zero prevents the lexer from re-using the token runs. */
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unsigned int keep_tokens;
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/* Error counter for exit code. */
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unsigned int errors;
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/* Line and column where a newline was first seen in a string
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constant (multi-line strings). */
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unsigned int mls_line;
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unsigned int mls_col;
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/* Buffer to hold macro definition string. */
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unsigned char *macro_buffer;
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unsigned int macro_buffer_len;
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/* Tree of other included files. See cppfiles.c. */
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struct splay_tree_s *all_include_files;
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/* Current maximum length of directory names in the search path
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for include files. (Altered as we get more of them.) */
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unsigned int max_include_len;
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/* Date and time tokens. Calculated together if either is requested. */
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cpp_token date;
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cpp_token time;
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/* EOF token, and a token forcing paste avoidance. */
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cpp_token avoid_paste;
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cpp_token eof;
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/* Opaque handle to the dependencies of mkdeps.c. Used by -M etc. */
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struct deps *deps;
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/* Obstack holding all macro hash nodes. This never shrinks.
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See cpphash.c */
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struct obstack hash_ob;
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/* Obstack holding buffer and conditional structures. This is a
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real stack. See cpplib.c. */
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struct obstack buffer_ob;
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/* Pragma table - dynamic, because a library user can add to the
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list of recognized pragmas. */
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struct pragma_entry *pragmas;
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/* Call backs. */
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struct cpp_callbacks cb;
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/* Identifier hash table. */
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struct ht *hash_table;
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/* User visible options. */
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struct cpp_options opts;
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/* Special nodes - identifiers with predefined significance to the
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preprocessor. */
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struct spec_nodes spec_nodes;
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/* Whether to print our version number. Done this way so
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we don't get it twice for -v -version. */
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unsigned char print_version;
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/* Whether cpplib owns the hashtable. */
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unsigned char our_hashtable;
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};
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/* Character classes. Based on the more primitive macros in safe-ctype.h.
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If the definition of `numchar' looks odd to you, please look up the
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definition of a pp-number in the C standard [section 6.4.8 of C99].
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In the unlikely event that characters other than \r and \n enter
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the set is_vspace, the macro handle_newline() in cpplex.c must be
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updated. */
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#define _dollar_ok(x) ((x) == '$' && CPP_OPTION (pfile, dollars_in_ident))
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#define is_idchar(x) (ISIDNUM(x) || _dollar_ok(x))
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#define is_numchar(x) ISIDNUM(x)
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#define is_idstart(x) (ISIDST(x) || _dollar_ok(x))
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#define is_numstart(x) ISDIGIT(x)
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#define is_hspace(x) ISBLANK(x)
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#define is_vspace(x) IS_VSPACE(x)
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#define is_nvspace(x) IS_NVSPACE(x)
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#define is_space(x) IS_SPACE_OR_NUL(x)
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/* This table is constant if it can be initialized at compile time,
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which is the case if cpp was compiled with GCC >=2.7, or another
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compiler that supports C99. */
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#if HAVE_DESIGNATED_INITIALIZERS
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extern const unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
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#else
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extern unsigned char _cpp_trigraph_map[UCHAR_MAX + 1];
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#endif
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/* Macros. */
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#define CPP_PRINT_DEPS(PFILE) CPP_OPTION (PFILE, print_deps)
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#define CPP_IN_SYSTEM_HEADER(PFILE) ((PFILE)->map && (PFILE)->map->sysp)
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#define CPP_PEDANTIC(PF) CPP_OPTION (PF, pedantic)
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#define CPP_WTRADITIONAL(PF) CPP_OPTION (PF, warn_traditional)
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/* In cpperror.c */
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enum error_type { WARNING = 0, WARNING_SYSHDR, PEDWARN, ERROR, FATAL, ICE };
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extern int _cpp_begin_message PARAMS ((cpp_reader *, enum error_type,
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unsigned int, unsigned int));
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/* In cppmacro.c */
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extern void _cpp_free_definition PARAMS ((cpp_hashnode *));
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extern int _cpp_create_definition PARAMS ((cpp_reader *, cpp_hashnode *));
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extern void _cpp_pop_context PARAMS ((cpp_reader *));
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/* In cpphash.c */
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extern void _cpp_init_hashtable PARAMS ((cpp_reader *, hash_table *));
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extern void _cpp_destroy_hashtable PARAMS ((cpp_reader *));
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/* In cppfiles.c */
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extern void _cpp_fake_include PARAMS ((cpp_reader *, const char *));
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extern void _cpp_never_reread PARAMS ((struct include_file *));
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extern char *_cpp_simplify_pathname PARAMS ((char *));
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extern bool _cpp_read_file PARAMS ((cpp_reader *, const char *));
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extern bool _cpp_execute_include PARAMS ((cpp_reader *,
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const cpp_token *,
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enum include_type));
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extern int _cpp_compare_file_date PARAMS ((cpp_reader *,
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const cpp_token *));
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extern void _cpp_report_missing_guards PARAMS ((cpp_reader *));
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extern void _cpp_init_includes PARAMS ((cpp_reader *));
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extern void _cpp_cleanup_includes PARAMS ((cpp_reader *));
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extern bool _cpp_pop_file_buffer PARAMS ((cpp_reader *,
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struct include_file *));
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/* In cppexp.c */
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extern int _cpp_parse_expr PARAMS ((cpp_reader *));
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/* In cpplex.c */
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extern cpp_token *_cpp_temp_token PARAMS ((cpp_reader *));
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extern const cpp_token *_cpp_lex_token PARAMS ((cpp_reader *));
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extern cpp_token *_cpp_lex_direct PARAMS ((cpp_reader *));
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extern int _cpp_equiv_tokens PARAMS ((const cpp_token *,
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const cpp_token *));
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extern void _cpp_init_tokenrun PARAMS ((tokenrun *, unsigned int));
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/* In cppinit.c. */
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extern bool _cpp_push_next_buffer PARAMS ((cpp_reader *));
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/* In cpplib.c */
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extern int _cpp_test_assertion PARAMS ((cpp_reader *, int *));
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extern int _cpp_handle_directive PARAMS ((cpp_reader *, int));
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extern void _cpp_define_builtin PARAMS ((cpp_reader *, const char *));
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extern void _cpp_do__Pragma PARAMS ((cpp_reader *));
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extern void _cpp_init_directives PARAMS ((cpp_reader *));
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extern void _cpp_init_internal_pragmas PARAMS ((cpp_reader *));
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extern void _cpp_do_file_change PARAMS ((cpp_reader *, enum lc_reason,
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const char *,
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unsigned int, unsigned int));
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extern void _cpp_pop_buffer PARAMS ((cpp_reader *));
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/* Utility routines and macros. */
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#define DSC(str) (const U_CHAR *)str, sizeof str - 1
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#define xnew(T) (T *) xmalloc (sizeof(T))
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#define xcnew(T) (T *) xcalloc (1, sizeof(T))
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#define xnewvec(T, N) (T *) xmalloc (sizeof(T) * (N))
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#define xcnewvec(T, N) (T *) xcalloc (N, sizeof(T))
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#define xobnew(O, T) (T *) obstack_alloc (O, sizeof(T))
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/* These are inline functions instead of macros so we can get type
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checking. */
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typedef unsigned char U_CHAR;
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#define U (const U_CHAR *) /* Intended use: U"string" */
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static inline int ustrcmp PARAMS ((const U_CHAR *, const U_CHAR *));
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static inline int ustrncmp PARAMS ((const U_CHAR *, const U_CHAR *,
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size_t));
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static inline size_t ustrlen PARAMS ((const U_CHAR *));
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static inline U_CHAR *uxstrdup PARAMS ((const U_CHAR *));
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static inline U_CHAR *ustrchr PARAMS ((const U_CHAR *, int));
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static inline int ufputs PARAMS ((const U_CHAR *, FILE *));
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static inline int
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ustrcmp (s1, s2)
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const U_CHAR *s1, *s2;
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{
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return strcmp ((const char *)s1, (const char *)s2);
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}
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static inline int
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ustrncmp (s1, s2, n)
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const U_CHAR *s1, *s2;
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size_t n;
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{
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return strncmp ((const char *)s1, (const char *)s2, n);
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}
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static inline size_t
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ustrlen (s1)
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const U_CHAR *s1;
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{
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return strlen ((const char *)s1);
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}
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static inline U_CHAR *
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uxstrdup (s1)
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const U_CHAR *s1;
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{
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return (U_CHAR *) xstrdup ((const char *)s1);
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}
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static inline U_CHAR *
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ustrchr (s1, c)
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const U_CHAR *s1;
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int c;
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{
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return (U_CHAR *) strchr ((const char *)s1, c);
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}
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static inline int
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ufputs (s, f)
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const U_CHAR *s;
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FILE *f;
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{
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return fputs ((const char *)s, f);
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}
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#endif /* ! GCC_CPPHASH_H */
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