1 /* Definitions for CPP library.
2 Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
3 Written by Per Bothner, 1994-95.
5 This program is free software; you can redistribute it and/or modify it
6 under the terms of the GNU General Public License as published by the
7 Free Software Foundation; either version 2, or (at your option) any
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
19 In other words, you are welcome to use, share and improve this program.
20 You are forbidden to forbid anyone else to use, share and improve
21 what you give them. Help stamp out software-hoarding! */
23 #include <sys/types.h>
30 typedef enum cpp_token (*parseUnderflow) (cppReader *);
31 typedef void (*parseCleanup) (cppBuffer *, cppReader *);
33 /* Structure returned by create_definition */
34 typedef struct s_macrodef macroDef;
36 /* A parse_marker indicates a previous position,
37 which we can backtrack to. */
40 /*@dependent@*/ cppBuffer *buf;
41 /*@dependent@*/ /*@null@*/ struct parse_marker *next;
45 /* The arglist structure is built by do_define to tell
46 collect_definition where the argument names begin. That
47 is, for a define like "#define f(x,y,z) foo+x-bar*y", the arglist
48 would contain pointers to the strings x, y, and z.
49 Collect_definition would then build a DEFINITION node,
50 with reflist nodes pointing to the places x, y, and z had
51 appeared. So the arglist is just convenience data passed
52 between these two routines. It is not kept around after
53 the current #define has been processed and entered into the
57 /*@null@*/ struct arglist *next;
58 /*@dependent@*/ char *name;
64 extern enum cpp_token cpplib_getToken (cppReader *);
65 extern enum cpp_token cpplib_getTokenForceExpand (cppReader *);
66 extern enum cpp_token cpplib_getTokenAux (cppReader *, bool p_forceExpand);
67 extern int /*@alt void@*/ cppSkipHspace (cppReader *);
69 /* This frees resources used by PFILE. */
70 extern /*@unused@*/ void cppCleanup (cppReader *p_pfile);
73 /*@null@*/ /*@only@*/ char *buf;
74 /*@null@*/ /*@exposed@*/ char *cur;
75 /*@null@*/ /*@exposed@*/ char *rlimit; /* end of valid data */
76 /*@null@*/ /*@exposed@*/ char *alimit; /* end of allocated buffer */
77 /*@null@*/ /*@exposed@*/ char *prev;
79 /*@dependent@*/ cstring fname;
81 /* Filename specified with #line command. */
82 /*@exposed@*/ cstring nominal_fname;
84 /* Record where in the search path this file was found.
87 /*@dependent@*/ /*@null@*/ struct file_name_list *dir;
90 int lineno; /* Line number at CPP_LINE_BASE. */
91 int colno; /* Column number at CPP_LINE_BASE. */
92 parseUnderflow underflow;
95 /*@dependent@*/ hashNode hnode;
96 /*@dependent@*/ /*@null@*/ struct parse_marker *marks;
97 /* Value of if_stack at start of this file.
98 Used to prohibit unmatched #endif (etc) in an include file. */
99 /*@null@*/ /*@exposed@*/ struct if_stack *if_stack;
101 /* True if this is a header file included using <FILENAME>. */
102 char system_header_p;
105 /* True if buffer contains escape sequences.
106 Currently there are three kinds:
107 "@-" means following identifier should not be macro-expanded.
108 "@ " means a token-separator. This turns into " " in final output
109 if not stringizing and needed to separate tokens; otherwise nothing.
110 "@@" means a normal '@'.
111 (An '@' inside a string stands for itself and is never an escape.) */
115 struct cpp_pending; /* Forward declaration - for C++. */
116 struct file_name_map_list;
118 /* Maximum nesting of cppBuffers. We use a static limit, partly for
119 efficiency, and partly to limit runaway recursion. */
121 /*@constant int CPP_STACK_MAX; @*/
122 # define CPP_STACK_MAX 200
124 /* A cppReader encapsulates the "state" of a pre-processor run.
125 Applying cppGetToken repeatedly yields a stream of pre-processor
126 tokens. Usually, there is only one cppReader object active. */
129 parseUnderflow get_token;
130 /*@dependent@*/ /*@null@*/ cppBuffer *buffer;
131 cppBuffer buffer_stack[CPP_STACK_MAX];
133 int errors; /* Error counter for exit code */
137 /* A buffer used for both for cppGetToken's output, and also internally. */
138 /*@relnull@*/ char *token_buffer;
140 /* Alocated size of token_buffer. cppReader_reserve allocates space. */
141 size_t token_buffer_size;
142 /* End of the written part of token_buffer. */
143 /*@exposed@*/ char *limit;
145 /* Line where a newline was first seen in a string constant. */
146 int multiline_string_line;
148 /* Current depth in #include directives that use <...>. */
149 int system_include_depth;
151 /* List of other included files.
152 If ->control_macro if nonzero, the file had a #ifndef
153 around the entire contents, and ->control_macro gives the macro name. */
154 /*@owned@*/ /*@null@*/ struct file_name_list *all_include_files;
156 /* Current maximum length of directory names in the search path
157 for include files. (Altered as we get more of them.) */
160 /*@null@*/ struct if_stack *if_stack;
162 /* Nonzero means we are inside an IF during a -pcp run. In this mode
163 macro expansion is done, and preconditions are output for all macro
164 uses requiring them. */
167 /* Nonzero means we have printed (while error reporting) a list of
168 containing files that matches the current status. */
169 char input_stack_listing_current;
171 /* If non-zero, macros are not expanded. */
172 bool no_macro_expand;
174 /* Print column number in error messages. */
177 /* If true, character between '<' and '>' are a single (string) token. */
178 char parsing_include_directive;
180 /* True if escape sequences (as described for has_escapes in
181 parse_buffer) should be emitted. */
184 /* 0: Have seen non-white-space on this line.
185 1: Only seen white space so far on this line.
186 2: Only seen white space so far in this file. */
187 char only_seen_white;
191 /*@null@*/ /*@observer@*/ struct tm *timebuf;
194 ~cppReader () { cppCleanup (this); }
198 /*@constant int cppReader_fatalErrorLimit; @*/
199 #define cppReader_fatalErrorLimit 1000
201 /* True if we have seen a "fatal" error. */
202 extern bool cpplib_fatalErrors (cppReader *) /*@*/ ;
203 #define cpplib_fatalErrors(READER) ((READER)->errors >= cppReader_fatalErrorLimit)
205 extern int cpplib_bufPeek (cppBuffer *) /*@*/ ;
207 /* Macros for manipulating the token_buffer. */
210 #define CPP_OUT_BUFFER(PFILE) ((PFILE)->token_buffer)
212 /* Number of characters currently in PFILE's output buffer. */
214 extern size_t cpplib_getWritten (/*@sef@*/ cppReader *) /*@*/ ;
215 # define cpplib_getWritten(PFILE) \
216 (size_fromInt ((PFILE)->limit - (PFILE)->token_buffer))
218 extern /*@exposed@*/ char *cpplib_getPWritten (cppReader *) /*@*/ ;
219 # define cpplib_getPWritten(PFILE) ((PFILE)->limit)
221 extern /*@null@*/ macroDef
222 cpplib_createDefinition (/*@dependent@*/ cstring p_def, fileloc p_loc,
223 bool p_predefinition, bool p_noExpand) ;
225 /* Make sure PFILE->token_buffer has space for at least N more characters. */
227 extern void cpplib_reserve (/*@sef@*/ cppReader *, /*@sef@*/ size_t);
228 #define cpplib_reserve(PFILE, N) \
229 (cpplib_getWritten (PFILE) + (N) > (PFILE)->token_buffer_size \
230 && (cppReader_growBuffer (PFILE, (N)), 0))
232 /* Append string STR (of length N) to PFILE's output buffer.
233 Assume there is enough space. */
235 extern void cppReader_putStrN (/*@sef@*/ cppReader *p_file,
236 /*@unique@*/ char *p_str, /*@sef@*/ size_t p_n)
237 /*@modifies *p_file; @*/;
239 #define cppReader_putStrN(PFILE, STR, N) \
240 (memcpy ((PFILE)->limit, STR, (N)), (PFILE)->limit += (N))
242 extern void cppReader_setWritten (/*@sef@*/ /*@special@*/ cppReader *p_file, size_t)
243 /*@uses p_file, *p_file, p_file->token_buffer;@*/
244 /*@sets p_file->limit;@*/
245 /*@modifies *p_file@*/ ;
247 # define cppReader_setWritten(PFILE,N) \
248 ((PFILE)->limit = (PFILE)->token_buffer + (N))
250 extern /*@dependent@*/ /*@exposed@*/ cppOptions *CPPOPTIONS (/*@special@*/ cppReader *p_pfile)
251 /*@uses p_pfile->opts@*/ ;
252 #define CPPOPTIONS(PFILE) ((PFILE)->opts)
255 #define CPPBUFFER(PFILE) ((PFILE)->buffer)
257 /* Checks for null */
258 extern /*@exposed@*/ cppBuffer *
259 cppReader_getBufferSafe (/*@special@*/ cppReader *p_pfile)
260 /*@uses p_pfile->buffer@*/
261 /*@modifies nothing@*/ ;
263 extern /*@exposed@*/ cppBuffer *cppBuffer_prevBuffer (cppBuffer *) /*@*/ ;
265 /* The bottom of the buffer stack. */
266 extern /*@exposed@*/ cppBuffer *cppReader_nullBuffer (/*@special@*/ cppReader *p_pfile) /*@uses p_pfile->buffer_stack@*/ /*@*/ ;
267 # define cppReader_nullBuffer(PFILE) (&(PFILE)->buffer_stack[CPP_STACK_MAX])
269 /* Pointed to by cppReader::data. */
271 /*@dependent@*/ cstring in_fname;
273 /* Name of output file, for error messages. */
274 /*@dependent@*/ cstring out_fname;
276 struct file_name_map_list *map_list;
278 /* Non-0 means -v, so print the full set of include dirs. */
281 /* Nonzero means use extra default include directories for C++. */
285 /* Nonzero means handle cplusplus style comments */
287 bool cplusplus_comments;
289 /* Nonzero means this is an assembly file, and allow
290 unknown directives, which could be comments. */
294 /* Nonzero means turn NOTREACHED into #pragma NOTREACHED etc */
298 /* Nonzero means handle CHILL comment syntax
299 and output CHILL string delimiter for __DATE___ etc. */
303 /* Nonzero means copy comments into the output file. */
305 bool put_out_comments;
307 /* Nonzero means don't process the ANSI trigraph sequences. */
311 /* Nonzero means print names of header files (-H). */
313 bool print_include_names;
315 /* Nonzero means try to make failure to fit ANSI C an error. */
317 bool pedantic_errors;
319 /* Nonzero means don't print warning messages. -w. */
320 /* bool inhibit_warnings; -- removed evans 2001-07-19 */
322 /* Nonzero means warn if slash-star appears in a comment. */
325 /* Nonzero means warn if a macro argument is (or would be)
326 stringified with -traditional. */
329 bool warnings_are_errors;
332 /* Nonzero means don't output line number information. */
334 bool no_line_commands;
336 /* Nonzero means output the text in failing conditionals,
337 inside #failed ... #endfailed. */
339 char output_conditionals;
343 /* Zero means dollar signs are punctuation.
344 This used to be needed for conformance to the C Standard,
345 before the C Standard was corrected. */
346 bool dollars_in_ident;
348 /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */
351 /* Nonzero for the 1989 C Standard, including corrigenda and amendments. */
354 /* Nonzero means give all the error messages the ANSI standard requires. */
357 bool done_initializing;
359 /* First dir to search */
360 /*@owned@*/ struct file_name_list *include;
361 /* First dir to search for <file> */
362 /* This is the first element to use for #include <...>.
363 If it is 0, use the entire chain for such includes. */
364 /*@dependent@*/ struct file_name_list *first_bracket_include;
365 /* This is the first element in the chain that corresponds to
366 a directory of system header files. */
367 /*@dependent@*/ struct file_name_list *first_system_include;
368 /*@exposed@*/ struct file_name_list *last_include; /* Last in chain */
370 /* Chain of include directories to put at the end of the other chain. */
371 struct file_name_list *after_include;
372 /*@exposed@*/ struct file_name_list *last_after_include; /* Last in chain */
374 /* Chain to put at the start of the system include files. */
375 struct file_name_list *before_system;
376 /*@exposed@*/ struct file_name_list *last_before_system; /* Last in chain */
378 /* Directory prefix that should replace `/usr' in the standard
379 include file directories. */
380 char *include_prefix;
382 char inhibit_predefs;
383 char no_standard_includes;
384 char no_standard_cplusplus_includes;
387 ** DUMP_NAMES means pass #define and the macro name through to output.
388 ** DUMP_DEFINITIONS means pass the whole definition (plus #define) through
392 enum { DUMP_NONE = 0, DUMP_NAMES, DUMP_DEFINITIONS }
396 /* Nonzero means pass all #define and #undef directives which we actually
397 process through to the output stream. This feature is used primarily
398 to allow cc1 to record the #defines and #undefs for the sake of
399 debuggers which understand about preprocessor macros, but it may
400 also be useful with -E to figure out how symbols are defined, and
401 where they are defined. */
405 extern bool cppReader_isTraditional (/*@special@*/ cppReader *p_pfile)
406 /*@uses p_pfile->opts@*/
407 /*@modifies nothing@*/ ;
409 #define cppReader_isTraditional(PFILE) (CPPOPTIONS(PFILE)-> traditional)
411 extern bool cppReader_isPedantic (cppReader *) /*@*/;
412 #define cppReader_isPedantic(PFILE) (CPPOPTIONS (PFILE)->pedantic)
414 /* The structure of a node in the hash table. The hash table
415 has entries for all tokens defined by #define commands (type T_MACRO),
416 plus some special tokens like __LINE__ (these each have their own
417 type, and the appropriate code is run when that type of node is seen.
418 It does not contain control words like "#define", which are recognized
419 by a separate piece of code. */
421 /* different flavors of hash nodes --- also used in keyword table */
424 T_DEFINE = 1, /* the `#define' keyword */
425 T_INCLUDE, /* the `#include' keyword */
426 T_INCLUDE_NEXT, /* the `#include_next' keyword */
427 T_IFDEF, /* the `#ifdef' keyword */
428 T_IFNDEF, /* the `#ifndef' keyword */
429 T_IF, /* the `#if' keyword */
430 T_ELSE, /* `#else' */
431 T_PRAGMA, /* `#pragma' */
432 T_ELIF, /* `#elif' */
433 T_UNDEF, /* `#undef' */
434 T_LINE, /* `#line' */
435 T_ERROR, /* `#error' */
436 T_WARNING, /* `#warning' */
437 T_ENDIF, /* `#endif' */
438 T_IDENT, /* `#ident', used on system V. */
439 T_SPECLINE, /* special symbol `__LINE__' */
440 T_DATE, /* `__DATE__' */
441 T_FILE, /* `__FILE__' */
442 T_BASE_FILE, /* `__BASE_FILE__' */
443 T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */
444 T_VERSION, /* `__VERSION__' */
445 T_SIZE_TYPE, /* `__SIZE_TYPE__' */
446 T_PTRDIFF_TYPE, /* `__PTRDIFF_TYPE__' */
447 T_WCHAR_TYPE, /* `__WCHAR_TYPE__' */
448 T_USER_LABEL_PREFIX_TYPE, /* `__USER_LABEL_PREFIX__' */
449 T_REGISTER_PREFIX_TYPE, /* `__REGISTER_PREFIX__' */
450 T_TIME, /* `__TIME__' */
451 T_CONST, /* Constant value, used by `__STDC__' */
452 T_MACRO, /* macro defined by `#define' */
453 T_DISABLED, /* macro temporarily turned off for rescan */
454 T_SPEC_DEFINED, /* special `defined' macro for use in #if statements */
455 T_PCSTRING, /* precompiled string (hashval is KEYDEF *) */
456 T_UNUSED /* Used for something not defined. */
461 /*@null@*/ struct definition *defn;
462 /*@exposed@*/ /*@relnull@*/ char *symnam; /* null if defn is null */
466 /* Structure allocated for every #define. For a simple replacement
469 nargs = -1, the `pattern' list is null, and the expansion is just
470 the replacement text. Nargs = 0 means a functionlike macro with no args,
472 #define getchar() getc (stdin) .
473 When there are args, the expansion is the replacement text with the
474 args squashed out, and the reflist is a list describing how to
475 build the output from the input: e.g., "3 chars, then the 1st arg,
476 then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg".
477 The chars here come from the expansion. Whatever is left of the
478 expansion after the last arg-occurrence is copied after that arg.
479 Note that the reflist can be arbitrarily long---
480 its length depends on the number of times the arguments appear in
481 the replacement text, not how many args there are. Example:
482 #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and
484 { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL }
485 where (x, y) means (nchars, argno). */
487 typedef struct definition DEFINITION;
491 size_t length; /* length of expansion string */
492 bool predefined; /* True if the macro was builtin or */
493 /* came from the command line */
494 /*@dependent@*/ char *expansion;
495 long line; /* Line number of definition */
496 /*@exposed@*/ cstring file; /* File of definition */
498 bool noExpand; /* True if macro should not be expanded in code. */
499 bool rest_args; /* Nonzero if last arg. absorbs the rest */
501 /*@null@*/ struct reflist {
502 /*@null@*/ /*@dependent@*/ struct reflist *next;
503 bool stringify; /* nonzero if this arg was preceded by a
505 bool raw_before; /* Nonzero if a ## operator before arg. */
506 bool raw_after; /* Nonzero if a ## operator after arg. */
507 bool rest_args; /* Nonzero if this arg. absorbs the rest */
508 int nchars; /* Number of literal chars to copy before
509 this arg occurrence. */
510 int argno; /* Number of arg to substitute (origin-0) */
514 /* Names of macro args, concatenated in reverse order
515 with comma-space between them.
516 The only use of this is that we warn on redefinition
517 if this differs between the old and new definitions. */
518 /*@null@*/ char *argnames;
522 /* Stack of conditionals currently in progress
523 (including both successful and failing conditionals). */
526 /*@null@*/ struct if_stack *next; /* for chaining to the next stack frame */
527 /*@observer@*/ cstring fname; /* copied from input when frame is made */
528 int lineno; /* similarly */
529 int if_succeeded; /* true if a leg of this if-group
530 has been passed through rescan */
532 /* For #ifndef at start of file, this is the macro name tested. */
533 /*@null@*/ /*@dependent@*/ char *control_macro;
536 enum node_type type; /* type of last directive seen in this group */
538 typedef struct if_stack cppIfStackFrame;
540 extern void cppBuffer_lineAndColumn (/*@null@*/ cppBuffer *, /*@out@*/ int *,
541 /*@out@*/ /*@null@*/ int *);
542 extern /*@exposed@*/ /*@null@*/ cppBuffer *cppReader_fileBuffer (cppReader *);
544 extern void cppReader_growBuffer (cppReader *, size_t);
545 extern int cppReader_parseEscape (cppReader *, char **);
547 extern /*@exposed@*/ cppBuffer *cppReader_popBuffer (cppReader *p_pfile)
548 /*@modifies p_pfile@*/ ;
554 extern void cppReader_skipRestOfLine (cppReader *p_pfile);
558 /*@constant observer char *GCC_INCLUDE_DIR;@*/
559 /* This is defined by config.h now. */
561 /*@constant observer char *GCC_INCLUDE_DIR2@*/
562 /* This is defined by config.h now. */
564 struct file_name_list
566 /*@owned@*/ /*@null@*/ struct file_name_list *next;
567 /*@dependent@*/ cstring fname;
569 /* If the following is nonzero, it is a macro name.
570 Don't include the file again if that macro is defined. */
572 /*@dependent@*/ /*@null@*/ char *control_macro;
573 /* If the following is nonzero, it is a C-language system include
576 bool c_system_include_path;
578 /* Mapping of file names for this directory. */
579 /*@exposed@*/ /*@relnull@*/ /*@reldef@*/ struct file_name_map *name_map;
581 /* Non-zero if name_map is valid. */
585 extern void cppReader_addIncludeChain (/*@special@*/ cppReader *p_pfile,
586 /*@keep@*/ struct file_name_list *p_dir)
587 /*@uses p_pfile->opts, p_pfile->max_include_len@*/
588 /*@modifies p_pfile, p_dir@*/ ;
590 extern void cppReader_define (cppReader *p_pfile, char *p_str);
591 extern void cppReader_finish (cppReader *p_pfile);
592 extern void cpplib_init (/*@out@*/ cppReader *p_pfile) ;
593 extern void cppOptions_init (/*@out@*/ cppOptions *p_opts);
594 extern void cpplib_initializeReader (cppReader *p_pfile) /*@modifies p_pfile@*/ ;
596 extern int cppReader_startProcess (cppReader *p_pfile, cstring p_fname);
598 extern bool isIdentifierChar (char) /*@*/ ;
600 /* Find the largest host integer type and set its size and type. */
602 #ifndef HOST_BITS_PER_WIDE_INT
604 #if HOST_BITS_PER_LONG > HOST_BITS_PER_INT
606 #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG
608 #define HOST_WIDE_INT long
611 #define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT
613 #define HOST_WIDE_INT long
621 #define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
627 #define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
631 #ifndef INCLUDE_LEN_FUDGE
632 /*@constant int INCLUDE_LEN_FUDGE@*/
633 #define INCLUDE_LEN_FUDGE 0
636 extern int cppReader_checkMacroName (cppReader *p_pfile, char *p_symname,
639 extern struct operation cppReader_parseNumber (cppReader *, char *, int);