home *** CD-ROM | disk | FTP | other *** search
- /* Definitions for CPP library.
- Copyright (C) 1995 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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! */
-
- #include <sys/types.h>
- #include <sys/stat.h>
-
- #ifdef __cplusplus
- extern "C" {
- #endif
-
- #define STATIC_BUFFERS
-
- typedef unsigned char U_CHAR;
-
- struct parse_file;
- typedef struct cpp_reader cpp_reader;
- typedef struct cpp_buffer cpp_buffer;
- typedef struct cpp_options cpp_options;
- typedef struct hashnode cpp_hashnode;
-
- enum cpp_token {
- CPP_EOF = -1,
- CPP_OTHER = 0,
- CPP_COMMENT = 1,
- CPP_HSPACE,
- CPP_VSPACE, /* newlines and #line directives */
- CPP_NAME,
- CPP_NUMBER,
- CPP_CHAR,
- CPP_STRING,
- CPP_DIRECTIVE,
- CPP_LPAREN, /* "(" */
- CPP_RPAREN, /* ")" */
- CPP_LBRACE, /* "{" */
- CPP_RBRACE, /* "}" */
- CPP_COMMA, /* "," */
- CPP_SEMICOLON,/* ";" */
- CPP_3DOTS, /* "..." */
- #if 0
- CPP_ANDAND, /* "&&" */
- CPP_OROR, /* "||" */
- CPP_LSH, /* "<<" */
- CPP_RSH, /* ">>" */
- CPP_EQL, /* "==" */
- CPP_NEQ, /* "!=" */
- CPP_LEQ, /* "<=" */
- CPP_GEQ, /* ">=" */
- CPP_PLPL, /* "++" */
- CPP_MINMIN, /* "--" */
- #endif
- /* POP_TOKEN is returned when we've popped a cpp_buffer. */
- CPP_POP
- };
-
- #ifndef PARAMS
- #ifdef __STDC
- #define PARAMS(P) P
- #else
- #define PARAMS(P) ()
- #endif
- #endif /* !PARAMS */
-
- typedef enum cpp_token (*parse_underflow_t) PARAMS((cpp_reader*));
- typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader*));
-
- /* A parse_marker indicates a previous position,
- which we can backtrack to. */
-
- struct parse_marker {
- cpp_buffer *buf;
- struct parse_marker *next;
- int position;
- };
-
- extern void parse_set_mark PARAMS ((struct parse_marker*, cpp_reader*));
- extern void parse_clear_mark PARAMS ((struct parse_marker*));
- extern void parse_goto_mark PARAMS((struct parse_marker*, cpp_reader*));
- extern void parse_move_mark PARAMS((struct parse_marker*, cpp_reader*));
-
- extern int cpp_handle_options PARAMS ((cpp_reader*, int, char**));
- extern enum cpp_token cpp_get_token PARAMS ((struct parse_marker*));
- extern void cpp_skip_hspace PARAMS((cpp_reader*));
- extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *));
-
-
- /* Maintain and search list of included files, for #import. */
-
- #define IMPORT_HASH_SIZE 31
-
- struct import_file {
- char *name;
- ino_t inode;
- dev_t dev;
- struct import_file *next;
- };
-
- /* If we have a huge buffer, may need to cache more recent counts */
- #define CPP_LINE_BASE(BUF) ((BUF)->buf + (BUF)->line_base)
-
- struct cpp_buffer {
- unsigned char *buf;
- unsigned char *cur;
- unsigned char *rlimit; /* end of valid data */
- unsigned char *alimit; /* end of allocated buffer */
- unsigned char *prev; /* start of current token */
-
- char *fname;
- /* Filename specified with #line command. */
- char *nominal_fname;
-
- /* Record where in the search path this file was found.
- For #include_next. */
- struct file_name_list *dir;
-
- long line_base;
- long lineno; /* Line number at CPP_LINE_BASE. */
- long colno; /* Column number at CPP_LINE_BASE. */
- #ifndef STATIC_BUFFERS
- cpp_buffer *chain;
- #endif
- parse_underflow_t underflow;
- parse_cleanup_t cleanup;
- void *data;
- struct parse_marker *marks;
- /* Value of if_stack at start of this file.
- Used to prohibit unmatched #endif (etc) in an include file. */
- struct if_stack *if_stack;
-
- /* True if this is a header file included using <FILENAME>. */
- char system_header_p;
- char seen_eof;
-
- /* True if buffer contains escape sequences.
- Currently there are are only two kind:
- "@-" means following identifier should not be macro-expanded.
- "@ " means a token-separator. This turns into " " in final output
- if not stringizing and needed to separate tokens; otherwise nothing.
- "@@" means a normal '@'.
- (An '@' inside a string stands for itself and is never an escape.) */
- char has_escapes;
- };
-
- struct cpp_pending; /* Forward declaration - for C++. */
- struct file_name_map_list;
-
- typedef struct assertion_hashnode ASSERTION_HASHNODE;
- #define ASSERTION_HASHSIZE 37
-
- #ifdef STATIC_BUFFERS
- /* Maximum nesting of cpp_buffers. We use a static limit, partly for
- efficiency, and partly to limit runaway recursion. */
- #define CPP_STACK_MAX 200
- #endif
-
- struct cpp_reader {
- unsigned char *limit;
- parse_underflow_t get_token;
- cpp_buffer *buffer;
- #ifdef STATIC_BUFFERS
- cpp_buffer buffer_stack[CPP_STACK_MAX];
- #endif
-
- int errors; /* Error counter for exit code */
- void *data;
-
- U_CHAR *token_buffer;
- int token_buffer_size;
-
- /* Line where a newline was first seen in a string constant. */
- int multiline_string_line;
-
- /* Current depth in #include directives that use <...>. */
- int system_include_depth;
-
- /* List of included files that contained #pragma once. */
- struct file_name_list *dont_repeat_files;
-
- /* List of other included files.
- If ->control_macro if nonzero, the file had a #ifndef
- around the entire contents, and ->control_macro gives the macro name. */
- struct file_name_list *all_include_files;
-
- /* Current maximum length of directory names in the search path
- for include files. (Altered as we get more of them.) */
- int max_include_len;
-
- /* Hash table of files already included with #include or #import. */
- struct import_file *import_hash_table[IMPORT_HASH_SIZE];
-
- struct if_stack *if_stack;
-
- /* Nonzero means we are inside an IF during a -pcp run. In this mode
- macro expansion is done, and preconditions are output for all macro
- uses requiring them. */
- char pcp_inside_if;
-
- /* Nonzero means we have printed (while error reporting) a list of
- containing files that matches the current status. */
- char input_stack_listing_current;
-
- /* If non-zero, macros are not expanded. */
- char no_macro_expand;
-
- /* Print column number in error messages. */
- char show_column;
-
- /* We're printed a warning recommending against using #import. */
- char import_warning;
-
- /* If true, character between '<' and '>' are a single (string) token. */
- char parsing_include_directive;
-
- /* True if escape sequences (as described for has_escapes in
- parse_buffer) should be emitted. */
- char output_escapes;
-
- /* 0: Have seen non-white-space on this line.
- 1: Only seen white space so far on this line.
- 2: Only seen white space so far in this file. */
- char only_seen_white;
-
- /* Nonzero means this file was included with a -imacros or -include
- command line and should not be recorded as an include file. */
-
- int no_record_file;
-
- long lineno;
-
- struct tm *timebuf;
-
- ASSERTION_HASHNODE *assertion_hashtab[ASSERTION_HASHSIZE];
-
- /* Buffer of -M output. */
- char *deps_buffer;
-
- /* Number of bytes allocated in above. */
- int deps_allocated_size;
-
- /* Number of bytes used. */
- int deps_size;
-
- /* Number of bytes since the last newline. */
- int deps_column;
- };
-
- #define CPP_BUF_PEEK(BUFFER) \
- ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF)
- #define CPP_BUF_GET(BUFFER) \
- ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur++ : EOF)
- #define CPP_FORWARD(BUFFER, N) ((BUFFER)->cur += (N))
-
- /* Number of characters currently in PFILE's output buffer. */
- #define CPP_WRITTEN(PFILE) ((PFILE)->limit - (PFILE)->token_buffer)
- #define CPP_PWRITTEN(PFILE) ((PFILE)->limit)
-
- /* Make sure PFILE->token_buffer has space for at least N more characters. */
- #define CPP_RESERVE(PFILE, N) \
- (CPP_WRITTEN (PFILE) + N > (PFILE)->token_buffer_size \
- && (cpp_grow_buffer (PFILE, N), 0))
-
- /* Append string STR (of length N) to PFILE's output buffer.
- Assume there is enough space. */
- #define CPP_PUTS_Q(PFILE, STR, N) \
- (bcopy (STR, (PFILE)->limit, (N)), (PFILE)->limit += (N))
- /* Append string STR (of length N) to PFILE's output buffer. Make space. */
- #define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N)
- /* Append character CH to PFILE's output buffer. Assume sufficient space. */
- #define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH))
- /* Append character CH to PFILE's output buffer. Make space if need be. */
- #define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH))
- /* Make sure PFILE->limit is followed by '\0'. */
- #define CPP_NUL_TERMINATE_Q(PFILE) (*(PFILE)->limit = 0)
- #define CPP_NUL_TERMINATE(PFILE) (CPP_RESERVE(PFILE, 1), *(PFILE)->limit = 0)
- #define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA))
- #define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N))
-
- #define CPP_OPTIONS(PFILE) ((cpp_options*)(PFILE)->data)
- #define CPP_BUFFER(PFILE) ((PFILE)->buffer)
- #ifdef STATIC_BUFFERS
- #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)+1)
- #define CPP_NULL_BUFFER(PFILE) (&(PFILE)->buffer_stack[CPP_STACK_MAX])
- #else
- #define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->chain)
- #define CPP_NULL_BUFFER(PFILE) ((cpp_buffer*)0)
- #endif
-
- /* Pointed to by parse_file::data. */
- struct cpp_options {
- char *in_fname;
-
- /* Name of output file, for error messages. */
- char *out_fname;
-
- struct file_name_map_list *map_list;
-
- /* Non-0 means -v, so print the full set of include dirs. */
- char verbose;
-
- /* Nonzero means use extra default include directories for C++. */
-
- char cplusplus;
-
- /* Nonzero means handle cplusplus style comments */
-
- char cplusplus_comments;
-
- /* Nonzero means handle #import, for objective C. */
-
- char objc;
-
- /* Nonzero means this is an assembly file, and allow
- unknown directives, which could be comments. */
-
- int lang_asm;
-
- /* Nonzero means turn NOTREACHED into #pragma NOTREACHED etc */
-
- char for_lint;
-
- /* Nonzero means handle CHILL comment syntax
- and output CHILL string delimiter for __DATE___ etc. */
-
- char chill;
-
- /* Nonzero means copy comments into the output file. */
-
- char put_out_comments;
-
- /* Nonzero means don't process the ANSI trigraph sequences. */
-
- char no_trigraphs;
-
- /* Nonzero means print the names of included files rather than
- the preprocessed output. 1 means just the #include "...",
- 2 means #include <...> as well. */
-
- char print_deps;
-
- /* Nonzero if missing .h files in -M output are assumed to be generated
- files and not errors. */
-
- char print_deps_missing_files;
-
- /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */
- char print_deps_append;
-
- /* Nonzero means print names of header files (-H). */
-
- char print_include_names;
-
- /* Nonzero means try to make failure to fit ANSI C an error. */
-
- char pedantic_errors;
-
- /* Nonzero means don't print warning messages. -w. */
-
- char inhibit_warnings;
-
- /* Nonzero means warn if slash-star appears in a comment. */
-
- char warn_comments;
-
- /* Nonzero means warn if there are any trigraphs. */
-
- char warn_trigraphs;
-
- /* Nonzero means warn if #import is used. */
-
- char warn_import;
-
- /* Nonzero means warn if a macro argument is (or would be)
- stringified with -traditional. */
-
- char warn_stringify;
-
- /* Nonzero means turn warnings into errors. */
-
- char warnings_are_errors;
-
- /* Nonzero causes output not to be done,
- but directives such as #define that have side effects
- are still obeyed. */
-
- char no_output;
-
- /* Nonzero means don't output line number information. */
-
- char no_line_commands;
-
- /* Nonzero means output the text in failing conditionals,
- inside #failed ... #endfailed. */
-
- char output_conditionals;
-
- /* Nonzero means -I- has been seen,
- so don't look for #include "foo" the source-file directory. */
- char ignore_srcdir;
-
- /* Zero means dollar signs are punctuation.
- -$ stores 0; -traditional may store 1. Default is 1 for VMS, 0 otherwise.
- This must be 0 for correct processing of this ANSI C program:
- #define foo(a) #a
- #define lose(b) foo (b)
- #define test$
- lose (test) */
- char dollars_in_ident;
- #ifndef DOLLARS_IN_IDENTIFIERS
- #define DOLLARS_IN_IDENTIFIERS 1
- #endif
-
- /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
- char traditional;
-
- /* Nonzero means give all the error messages the ANSI standard requires. */
- char pedantic;
-
- char done_initializing;
-
- struct file_name_list *include; /* First dir to search */
- /* First dir to search for <file> */
- /* This is the first element to use for #include <...>.
- If it is 0, use the entire chain for such includes. */
- struct file_name_list *first_bracket_include;
- /* This is the first element in the chain that corresponds to
- a directory of system header files. */
- struct file_name_list *first_system_include;
- struct file_name_list *last_include; /* Last in chain */
-
- /* Chain of include directories to put at the end of the other chain. */
- struct file_name_list *after_include;
- struct file_name_list *last_after_include; /* Last in chain */
-
- /* Chain to put at the start of the system include files. */
- struct file_name_list *before_system;
- struct file_name_list *last_before_system; /* Last in chain */
-
- /* Directory prefix that should replace `/usr' in the standard
- include file directories. */
- char *include_prefix;
-
- char inhibit_predefs;
- char no_standard_includes;
- char no_standard_cplusplus_includes;
-
- /* dump_only means inhibit output of the preprocessed text
- and instead output the definitions of all user-defined
- macros in a form suitable for use as input to cccp.
- dump_names means pass #define and the macro name through to output.
- dump_definitions means pass the whole definition (plus #define) through
- */
-
- enum {dump_none = 0, dump_only, dump_names, dump_definitions}
- dump_macros;
-
- /* Nonzero means pass all #define and #undef directives which we actually
- process through to the output stream. This feature is used primarily
- to allow cc1 to record the #defines and #undefs for the sake of
- debuggers which understand about preprocessor macros, but it may
- also be useful with -E to figure out how symbols are defined, and
- where they are defined. */
- int debug_output;
-
- /* Pending -D, -U and -A options, in reverse order. */
- struct cpp_pending *pending;
-
- /* File name which deps are being written to.
- This is 0 if deps are being written to stdout. */
- char *deps_file;
-
- /* Target-name to write with the dependency information. */
- char *deps_target;
- };
-
- #define CPP_TRADITIONAL(PFILE) (CPP_OPTIONS(PFILE)-> traditional)
- #define CPP_PEDANTIC(PFILE) (CPP_OPTIONS (PFILE)->pedantic)
- #define CPP_PRINT_DEPS(PFILE) (CPP_OPTIONS (PFILE)->print_deps)
-
- /* Name under which this program was invoked. */
-
- extern char *progname;
-
- /* The structure of a node in the hash table. The hash table
- has entries for all tokens defined by #define commands (type T_MACRO),
- plus some special tokens like __LINE__ (these each have their own
- type, and the appropriate code is run when that type of node is seen.
- It does not contain control words like "#define", which are recognized
- by a separate piece of code. */
-
- /* different flavors of hash nodes --- also used in keyword table */
- enum node_type {
- T_DEFINE = 1, /* the `#define' keyword */
- T_INCLUDE, /* the `#include' keyword */
- T_INCLUDE_NEXT, /* the `#include_next' keyword */
- T_IMPORT, /* the `#import' keyword */
- T_IFDEF, /* the `#ifdef' keyword */
- T_IFNDEF, /* the `#ifndef' keyword */
- T_IF, /* the `#if' keyword */
- T_ELSE, /* `#else' */
- T_PRAGMA, /* `#pragma' */
- T_ELIF, /* `#elif' */
- T_UNDEF, /* `#undef' */
- T_LINE, /* `#line' */
- T_ERROR, /* `#error' */
- T_WARNING, /* `#warning' */
- T_ENDIF, /* `#endif' */
- T_SCCS, /* `#sccs', used on system V. */
- T_IDENT, /* `#ident', used on system V. */
- T_ASSERT, /* `#assert', taken from system V. */
- T_UNASSERT, /* `#unassert', taken from system V. */
- T_SPECLINE, /* special symbol `__LINE__' */
- T_DATE, /* `__DATE__' */
- T_FILE, /* `__FILE__' */
- T_BASE_FILE, /* `__BASE_FILE__' */
- T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
- T_VERSION, /* `__VERSION__' */
- T_SIZE_TYPE, /* `__SIZE_TYPE__' */
- T_PTRDIFF_TYPE, /* `__PTRDIFF_TYPE__' */
- T_WCHAR_TYPE, /* `__WCHAR_TYPE__' */
- T_USER_LABEL_PREFIX_TYPE, /* `__USER_LABEL_PREFIX__' */
- T_REGISTER_PREFIX_TYPE, /* `__REGISTER_PREFIX__' */
- T_TIME, /* `__TIME__' */
- T_CONST, /* Constant value, used by `__STDC__' */
- T_MACRO, /* macro defined by `#define' */
- T_DISABLED, /* macro temporarily turned off for rescan */
- T_SPEC_DEFINED, /* special `defined' macro for use in #if statements */
- T_PCSTRING, /* precompiled string (hashval is KEYDEF *) */
- T_UNUSED /* Used for something not defined. */
- };
-
- /* Structure returned by create_definition */
- typedef struct macrodef MACRODEF;
- struct macrodef
- {
- struct definition *defn;
- U_CHAR *symnam;
- int symlen;
- };
-
- /* Structure allocated for every #define. For a simple replacement
- such as
- #define foo bar ,
- nargs = -1, the `pattern' list is null, and the expansion is just
- the replacement text. Nargs = 0 means a functionlike macro with no args,
- e.g.,
- #define getchar() getc (stdin) .
- When there are args, the expansion is the replacement text with the
- args squashed out, and the reflist is a list describing how to
- build the output from the input: e.g., "3 chars, then the 1st arg,
- then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
- The chars here come from the expansion. Whatever is left of the
- expansion after the last arg-occurrence is copied after that arg.
- Note that the reflist can be arbitrarily long---
- its length depends on the number of times the arguments appear in
- the replacement text, not how many args there are. Example:
- #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
- pattern list
- { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
- where (x, y) means (nchars, argno). */
-
- typedef struct definition DEFINITION;
- struct definition {
- int nargs;
- int length; /* length of expansion string */
- int predefined; /* True if the macro was builtin or */
- /* came from the command line */
- U_CHAR *expansion;
- int line; /* Line number of definition */
- char *file; /* File of definition */
- char rest_args; /* Nonzero if last arg. absorbs the rest */
- struct reflist {
- struct reflist *next;
- char stringify; /* nonzero if this arg was preceded by a
- # operator. */
- char raw_before; /* Nonzero if a ## operator before arg. */
- char raw_after; /* Nonzero if a ## operator after arg. */
- char rest_args; /* Nonzero if this arg. absorbs the rest */
- int nchars; /* Number of literal chars to copy before
- this arg occurrence. */
- int argno; /* Number of arg to substitute (origin-0) */
- } *pattern;
- union {
- /* Names of macro args, concatenated in reverse order
- with comma-space between them.
- The only use of this is that we warn on redefinition
- if this differs between the old and new definitions. */
- U_CHAR *argnames;
- } args;
- };
-
- extern U_CHAR is_idchar[256];
-
- /* Stack of conditionals currently in progress
- (including both successful and failing conditionals). */
-
- struct if_stack {
- struct if_stack *next; /* for chaining to the next stack frame */
- char *fname; /* copied from input when frame is made */
- int lineno; /* similarly */
- int if_succeeded; /* true if a leg of this if-group
- has been passed through rescan */
- U_CHAR *control_macro; /* For #ifndef at start of file,
- this is the macro name tested. */
- enum node_type type; /* type of last directive seen in this group */
- };
- typedef struct if_stack IF_STACK_FRAME;
-
- extern void cpp_buf_line_and_col PARAMS((cpp_buffer*, long*, long*));
- extern cpp_buffer* cpp_file_buffer PARAMS((cpp_reader*));
- extern void cpp_define PARAMS ((cpp_reader*, U_CHAR*));
-
- extern void cpp_error ();
- extern void cpp_warning ();
- extern void cpp_pedwarn ();
- extern void cpp_error_with_line ();
- extern void cpp_pedwarn_with_line ();
- extern void cpp_pedwarn_with_file_and_line ();
- extern void fatal ();
- extern void cpp_error_from_errno ();
- extern void cpp_perror_with_name ();
- extern void cpp_pfatal_with_name ();
-
- extern void cpp_grow_buffer PARAMS ((cpp_reader*, long));
- extern int cpp_parse_escape PARAMS ((cpp_reader*, char**));
- extern cpp_buffer* cpp_push_buffer PARAMS ((cpp_reader *, U_CHAR*, long));
- extern cpp_buffer* cpp_pop_buffer PARAMS ((cpp_reader *));
-
- extern cpp_hashnode* cpp_lookup PARAMS ((cpp_reader*, const U_CHAR*,
- int, int));
-
- #ifdef __cplusplus
- }
- #endif
-