* tree-cfg.c (tree_find_edge_insert_loc): Handle naked RETURN_EXPR.
[official-gcc.git] / gcc / fix-header.c
blob9ba38867f6c6de94296707d0dbd30037100aba20
1 /* fix-header.c - Make C header file suitable for C++.
2 Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
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
8 later version.
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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
19 /* This program massages a system include file (such as stdio.h),
20 into a form that is compatible with GNU C and GNU C++.
22 * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
23 if they seem to be needed. These prevent C++ compilers from name
24 mangling the functions inside the braces.
26 * If an old-style incomplete function declaration is seen (without
27 an argument list), and it is a "standard" function listed in
28 the file sys-protos.h (and with a non-empty argument list), then
29 the declaration is converted to a complete prototype by replacing
30 the empty parameter list with the argument list from sys-protos.h.
32 * The program can be given a list of (names of) required standard
33 functions (such as fclose for stdio.h). If a required function
34 is not seen in the input, then a prototype for it will be
35 written to the output.
37 * If all of the non-comment code of the original file is protected
38 against multiple inclusion:
39 #ifndef FOO
40 #define FOO
41 <body of include file>
42 #endif
43 then extra matter added to the include file is placed inside the <body>.
45 * If the input file is OK (nothing needs to be done);
46 the output file is not written (nor removed if it exists).
48 There are also some special actions that are done for certain
49 well-known standard include files:
51 * If argv[1] is "sys/stat.h", the Posix.1 macros
52 S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
53 they were missing, and the corresponding "traditional" S_IFxxx
54 macros were defined.
56 * If argv[1] is "errno.h", errno is declared if it was missing.
58 * TODO: The input file should be read complete into memory, because:
59 a) it needs to be scanned twice anyway, and
60 b) it would be nice to allow update in place.
62 Usage:
63 fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
64 where:
65 * FOO.H is the relative file name of the include file,
66 as it would be #include'd by a C file. (E.g. stdio.h)
67 * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
68 * OUTFILE.H is the full pathname for where to write the output file,
69 if anything needs to be done. (e.g. ./include/stdio.h)
70 * OPTIONS can be -D or -I switches as you would pass to cpp.
72 Written by Per Bothner <bothner@cygnus.com>, July 1993. */
74 #include "bconfig.h"
75 #include "system.h"
76 #include "coretypes.h"
77 #include "tm.h"
78 #include "obstack.h"
79 #include "scan.h"
80 #include "cpplib.h"
81 #include "c-incpath.h"
82 #include "errors.h"
84 #ifdef TARGET_EXTRA_INCLUDES
85 void TARGET_EXTRA_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
86 const char *iprefix ATTRIBUTE_UNUSED,
87 int stdinc ATTRIBUTE_UNUSED)
90 #endif
92 #ifdef TARGET_EXTRA_PRE_INCLUDES
93 void TARGET_EXTRA_PRE_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
94 const char *iprefix ATTRIBUTE_UNUSED,
95 int stdinc ATTRIBUTE_UNUSED)
98 #endif
100 struct line_maps line_table;
102 sstring buf;
104 int verbose = 0;
105 int partial_count = 0;
106 int warnings = 0;
108 #if ADD_MISSING_EXTERN_C
109 int missing_extern_C_count = 0;
110 #endif
112 #include "xsys-protos.h"
114 #ifdef FIXPROTO_IGNORE_LIST
115 /* This is a currently unused feature. */
117 /* List of files and directories to ignore.
118 A directory name (ending in '/') means ignore anything in that
119 directory. (It might be more efficient to do directory pruning
120 earlier in fixproto, but this is simpler and easier to customize.) */
122 static const char *const files_to_ignore[] = {
123 "X11/",
124 FIXPROTO_IGNORE_LIST
127 #endif
129 char *inf_buffer;
130 char *inf_limit;
131 char *inf_ptr;
132 static const char *cur_file;
134 /* Certain standard files get extra treatment */
136 enum special_file
138 no_special,
139 #ifdef errno_h
140 #undef errno_h
141 #endif
142 errno_h,
143 #ifdef stdio_h
144 #undef stdio_h
145 #endif
146 stdio_h,
147 #ifdef stdlib_h
148 #undef stdlib_h
149 #endif
150 stdlib_h,
151 #ifdef sys_stat_h
152 #undef sys_stat_h
153 #endif
154 sys_stat_h
157 /* A NAMELIST is a sequence of names, separated by '\0', and terminated
158 by an empty name (i.e. by "\0\0"). */
160 typedef const char *namelist;
162 /* The following macros provide the bits for symbol_flags. */
163 typedef int symbol_flags;
165 /* Used to mark names defined in the ANSI/ISO C standard. */
166 #define ANSI_SYMBOL 1
168 /* We no longer massage include files for POSIX or XOPEN symbols,
169 as there are now several versions of the POSIX and XOPEN standards,
170 and it would be a maintenance nightmare for us to track them all.
171 Better to be compatible with the system include files. */
172 /*#define ADD_MISSING_POSIX 1 */
173 /*#define ADD_MISSING_XOPEN 1 */
175 #if ADD_MISSING_POSIX
176 /* Used to mark names defined in the Posix.1 or Posix.2 standard. */
177 #define POSIX1_SYMBOL 2
178 #define POSIX2_SYMBOL 4
179 #else
180 #define POSIX1_SYMBOL 0
181 #define POSIX2_SYMBOL 0
182 #endif
184 #if ADD_MISSING_XOPEN
185 /* Used to mark names defined in X/Open Portability Guide. */
186 #define XOPEN_SYMBOL 8
187 /* Used to mark names defined in X/Open UNIX Extensions. */
188 #define XOPEN_EXTENDED_SYMBOL 16
189 #else
190 #define XOPEN_SYMBOL 0
191 #define XOPEN_EXTENDED_SYMBOL 0
192 #endif
194 /* Used to indicate names that are not functions */
195 #define MACRO_SYMBOL 512
197 struct symbol_list {
198 symbol_flags flags;
199 namelist names;
202 #define SYMBOL_TABLE_SIZE 10
203 struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
204 int cur_symbol_table_size;
206 static void add_symbols (symbol_flags, namelist);
207 static struct fn_decl *lookup_std_proto (const char *, int);
208 static void write_lbrac (void);
209 static void recognized_macro (const char *);
210 static void check_macro_names (cpp_reader *, namelist);
211 static void read_scan_file (char *, int, char **);
212 static void write_rbrac (void);
213 static int inf_skip_spaces (int);
214 static int inf_read_upto (sstring *, int);
215 static int inf_scan_ident (sstring *, int);
216 static int check_protection (int *, int *);
217 static void cb_file_change (cpp_reader *, const struct line_map *);
219 static void
220 add_symbols (symbol_flags flags, namelist names)
222 symbol_table[cur_symbol_table_size].flags = flags;
223 symbol_table[cur_symbol_table_size].names = names;
224 cur_symbol_table_size++;
225 if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
226 fatal ("too many calls to add_symbols");
227 symbol_table[cur_symbol_table_size].names = NULL; /* Termination. */
230 struct std_include_entry {
231 const char *const name;
232 const symbol_flags flags;
233 const namelist names;
236 const char NONE[] = ""; /* The empty namelist. */
238 /* Special name to indicate a continuation line in std_include_table. */
239 const char CONTINUED[] = "";
241 const struct std_include_entry *include_entry;
243 const struct std_include_entry std_include_table [] = {
244 { "ctype.h", ANSI_SYMBOL,
245 "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
246 isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
248 { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
250 { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
252 /* ANSI_SYMBOL is wrong, but ... */
253 { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
254 mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
255 scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
256 waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
257 wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
259 { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
261 /* Maybe also "getgrent fgetgrent setgrent endgrent" */
262 { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
264 /*{ "limit.h", ... provided by gcc }, */
266 { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
268 { "math.h", ANSI_SYMBOL,
269 "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
270 fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
271 tan\0tanh\0" },
273 { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
275 { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
277 /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf. */
278 { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
280 /* Left out signal() - its prototype is too complex for us!
281 Also left out "sigaction sigaddset sigdelset sigemptyset
282 sigfillset sigismember sigpending sigprocmask sigsuspend"
283 because these need sigset_t or struct sigaction.
284 Most systems that provide them will also declare them. */
285 { "signal.h", ANSI_SYMBOL, "raise\0" },
286 { CONTINUED, POSIX1_SYMBOL, "kill\0" },
288 { "stdio.h", ANSI_SYMBOL,
289 "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
290 fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
291 fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
292 printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
293 setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
294 tmpnam\0ungetc\0" },
295 { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
296 { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" }, /* I think ... */
297 /* Should perhaps also handle NULL, EOF, ... ? */
299 /* "div ldiv", - ignored because these depend on div_t, ldiv_t
300 ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
301 Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
302 Should perhaps also add NULL */
303 { "stdlib.h", ANSI_SYMBOL,
304 "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
305 exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\
306 srand\0strtod\0strtol\0strtoul\0system\0" },
307 { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
308 { CONTINUED, POSIX1_SYMBOL, "putenv\0" },
310 { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
311 strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
312 strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
313 strtok\0strxfrm\0" },
314 /* Should perhaps also add NULL and size_t */
316 { "strings.h", XOPEN_EXTENDED_SYMBOL,
317 "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
319 { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
321 /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
322 ioctl in <strops.h>. However, many systems have it is sys/ioctl.h,
323 and many systems do have <sys/ioctl.h> but not <strops.h>. */
324 { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
326 { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
328 { "sys/stat.h", POSIX1_SYMBOL,
329 "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
330 { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
331 "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
332 S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
333 { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
335 #if 0
336 /* How do we handle fd_set? */
337 { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
338 { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
339 #endif
341 { "sys/times.h", POSIX1_SYMBOL, "times\0" },
342 /* "sys/types.h" add types (not in old g++-include) */
344 { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
346 { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
347 { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
348 "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
349 WTERMSIG\0WNOHANG\0WNOTRACED\0" },
351 { "tar.h", POSIX1_SYMBOL, NONE },
353 { "termios.h", POSIX1_SYMBOL,
354 "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
356 { "time.h", ANSI_SYMBOL,
357 "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" },
358 { CONTINUED, POSIX1_SYMBOL, "tzset\0" },
360 { "unistd.h", POSIX1_SYMBOL,
361 "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
362 dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
363 getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
364 getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
365 setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
366 ttyname\0unlink\0write\0" },
367 { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
368 { CONTINUED, XOPEN_EXTENDED_SYMBOL,
369 "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
371 { "utime.h", POSIX1_SYMBOL, "utime\0" },
373 { NULL, 0, NONE }
376 enum special_file special_file_handling = no_special;
378 /* They are set if the corresponding macro has been seen. */
379 /* The following are only used when handling sys/stat.h */
380 int seen_S_IFBLK = 0, seen_S_ISBLK = 0;
381 int seen_S_IFCHR = 0, seen_S_ISCHR = 0;
382 int seen_S_IFDIR = 0, seen_S_ISDIR = 0;
383 int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
384 int seen_S_IFLNK = 0, seen_S_ISLNK = 0;
385 int seen_S_IFREG = 0, seen_S_ISREG = 0;
386 /* The following are only used when handling errno.h */
387 int seen_errno = 0;
388 /* The following are only used when handling stdlib.h */
389 int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
391 struct obstack scan_file_obstack;
393 /* NOTE: If you edit this, also edit gen-protos.c !! */
395 static struct fn_decl *
396 lookup_std_proto (const char *name, int name_length)
398 int i = hashstr (name, name_length) % HASH_SIZE;
399 int i0 = i;
400 for (;;)
402 struct fn_decl *fn;
403 if (hash_tab[i] == 0)
404 return NULL;
405 fn = &std_protos[hash_tab[i]];
406 if ((int) strlen (fn->fname) == name_length
407 && strncmp (fn->fname, name, name_length) == 0)
408 return fn;
409 i = (i+1) % HASH_SIZE;
410 gcc_assert (i != i0);
414 char *inc_filename;
415 int inc_filename_length;
416 FILE *outf;
417 sstring line;
419 int lbrac_line, rbrac_line;
421 int required_unseen_count = 0;
422 int required_other = 0;
424 static void
425 write_lbrac (void)
427 if (partial_count)
429 fprintf (outf, "#ifndef _PARAMS\n");
430 fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
431 fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
432 fprintf (outf, "#else\n");
433 fprintf (outf, "#define _PARAMS(ARGS) ()\n");
434 fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
438 struct partial_proto
440 struct partial_proto *next;
441 struct fn_decl *fn;
442 int line_seen;
445 struct partial_proto *partial_proto_list = NULL;
447 struct partial_proto required_dummy_proto, seen_dummy_proto;
448 #define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
449 #define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
450 #define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
451 #define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
453 static void
454 recognized_macro (const char *fname)
456 /* The original include file defines fname as a macro. */
457 struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
459 /* Since fname is a macro, don't require a prototype for it. */
460 if (fn)
462 if (REQUIRED (fn))
463 required_unseen_count--;
464 SET_SEEN (fn);
467 switch (special_file_handling)
469 case errno_h:
470 if (strcmp (fname, "errno") == 0 && !seen_errno)
471 seen_errno = 1, required_other--;
472 break;
473 case stdlib_h:
474 if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
475 seen_EXIT_FAILURE = 1, required_other--;
476 if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
477 seen_EXIT_SUCCESS = 1, required_other--;
478 break;
479 case sys_stat_h:
480 if (fname[0] == 'S' && fname[1] == '_')
482 if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
483 else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
484 else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
485 else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
486 else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
487 else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
488 else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
489 else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
490 else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
491 else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
492 else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
493 else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
495 break;
497 default:
498 break;
502 void
503 recognized_extern (const cpp_token *name)
505 switch (special_file_handling)
507 case errno_h:
508 if (cpp_ideq (name, "errno"))
509 seen_errno = 1, required_other--;
510 break;
512 default:
513 break;
517 /* Called by scan_decls if it saw a function definition for a function
518 named FNAME. KIND is 'I' for an inline function; 'F' if a normal
519 function declaration preceded by 'extern "C"' (or nested inside
520 'extern "C"' braces); or 'f' for other function declarations. */
522 void
523 recognized_function (const cpp_token *fname, unsigned int line, int kind,
524 int have_arg_list)
526 struct partial_proto *partial;
527 int i;
528 struct fn_decl *fn;
530 fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
531 NODE_LEN (fname->val.node));
533 /* Remove the function from the list of required function. */
534 if (fn)
536 if (REQUIRED (fn))
537 required_unseen_count--;
538 SET_SEEN (fn);
541 /* If we have a full prototype, we're done. */
542 if (have_arg_list)
543 return;
545 if (kind == 'I') /* don't edit inline function */
546 return;
548 /* If the partial prototype was included from some other file,
549 we don't need to patch it up (in this run). */
550 i = strlen (cur_file);
551 if (i < inc_filename_length
552 || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
553 return;
555 if (fn == NULL)
556 return;
557 if (fn->params[0] == '\0')
558 return;
560 /* We only have a partial function declaration,
561 so remember that we have to add a complete prototype. */
562 partial_count++;
563 partial = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
564 partial->line_seen = line;
565 partial->fn = fn;
566 fn->partial = partial;
567 partial->next = partial_proto_list;
568 partial_proto_list = partial;
569 if (verbose)
571 fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
572 inc_filename, fn->fname);
576 /* For any name in NAMES that is defined as a macro,
577 call recognized_macro on it. */
579 static void
580 check_macro_names (cpp_reader *pfile, namelist names)
582 size_t len;
583 while (*names)
585 len = strlen (names);
586 if (cpp_defined (pfile, (const unsigned char *)names, len))
587 recognized_macro (names);
588 names += len + 1;
592 static void
593 cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
594 const struct line_map *map)
596 /* Just keep track of current file name. */
597 cur_file = map == NULL ? NULL : map->to_file;
600 static void
601 read_scan_file (char *in_fname, int argc, char **argv)
603 cpp_reader *scan_in;
604 cpp_callbacks *cb;
605 cpp_options *options;
606 struct fn_decl *fn;
607 int i, strings_processed;
608 struct symbol_list *cur_symbols;
610 obstack_init (&scan_file_obstack);
612 linemap_init (&line_table);
613 scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table);
614 cb = cpp_get_callbacks (scan_in);
615 cb->file_change = cb_file_change;
617 /* We are going to be scanning a header file out of its proper context,
618 so ignore warnings and errors. */
619 options = cpp_get_options (scan_in);
620 options->inhibit_warnings = 1;
621 options->inhibit_errors = 1;
622 cpp_post_options (scan_in);
624 if (!cpp_read_main_file (scan_in, in_fname))
625 exit (FATAL_EXIT_CODE);
627 cpp_change_file (scan_in, LC_RENAME, "<built-in>");
628 cpp_init_builtins (scan_in, true);
629 cpp_change_file (scan_in, LC_RENAME, in_fname);
631 /* Process switches after builtins so -D can override them. */
632 for (i = 0; i < argc; i += strings_processed)
634 strings_processed = 0;
635 if (argv[i][0] == '-')
637 if (argv[i][1] == 'I')
639 if (argv[i][2] != '\0')
641 strings_processed = 1;
642 add_path (xstrdup (argv[i] + 2), BRACKET, false, false);
644 else if (i + 1 != argc)
646 strings_processed = 2;
647 add_path (xstrdup (argv[i + 1]), BRACKET, false, false);
650 else if (argv[i][1] == 'D')
652 if (argv[i][2] != '\0')
653 strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
654 else if (i + 1 != argc)
655 strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
659 if (strings_processed == 0)
660 break;
663 if (i < argc)
664 cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
665 if (cpp_errors (scan_in))
666 exit (FATAL_EXIT_CODE);
668 register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
669 true /* stdinc */, false /* cxx_stdinc */,
670 false /* verbose */);
672 /* We are scanning a system header, so mark it as such. */
673 cpp_make_system_header (scan_in, 1, 0);
675 scan_decls (scan_in, argc, argv);
676 for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
677 check_macro_names (scan_in, cur_symbols->names);
679 /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
680 If so, those functions are also required. */
681 if (special_file_handling == stdio_h
682 && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
684 unsigned char getchar_call[] = "getchar();\n";
685 int seen_filbuf = 0;
687 /* Scan the macro expansion of "getchar();". */
688 cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
689 /* from_stage3 */ true);
690 for (;;)
692 const cpp_token *t = cpp_get_token (scan_in);
694 if (t->type == CPP_EOF)
695 break;
696 else if (cpp_ideq (t, "_filbuf"))
697 seen_filbuf++;
700 if (seen_filbuf)
702 int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
703 struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
704 int need_flsbuf
705 = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
707 /* Append "_filbuf" and/or "_flsbuf" to the required functions. */
708 if (need_filbuf + need_flsbuf)
710 const char *new_list;
711 if (need_filbuf)
712 SET_REQUIRED (fn);
713 if (need_flsbuf)
714 SET_REQUIRED (flsbuf_fn);
715 if (need_flsbuf && need_filbuf)
716 new_list = "_filbuf\0_flsbuf\0";
717 else if (need_flsbuf)
718 new_list = "_flsbuf\0";
719 else /* if (need_flsbuf) */
720 new_list = "_filbuf\0";
721 add_symbols (ANSI_SYMBOL, new_list);
722 required_unseen_count += need_filbuf + need_flsbuf;
727 if (required_unseen_count + partial_count + required_other == 0)
729 if (verbose)
730 fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
731 exit (SUCCESS_EXIT_CODE);
733 if (!verbose)
734 fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
735 else
737 if (required_unseen_count)
738 fprintf (stderr, "%s: %d missing function declarations.\n",
739 inc_filename, required_unseen_count);
740 if (partial_count)
741 fprintf (stderr, "%s: %d non-prototype function declarations.\n",
742 inc_filename, partial_count);
746 static void
747 write_rbrac (void)
749 struct fn_decl *fn;
750 const char *cptr;
751 struct symbol_list *cur_symbols;
753 if (required_unseen_count)
755 #ifdef NO_IMPLICIT_EXTERN_C
756 fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
757 #endif
760 /* Now we print out prototypes for those functions that we haven't seen. */
761 for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
763 int if_was_emitted = 0;
764 int name_len;
765 cptr = cur_symbols->names;
766 for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
768 int macro_protect = 0;
770 if (cur_symbols->flags & MACRO_SYMBOL)
771 continue;
773 fn = lookup_std_proto (cptr, name_len);
774 if (fn == NULL || !REQUIRED (fn))
775 continue;
777 if (!if_was_emitted)
779 /* what about curses. ??? or _flsbuf/_filbuf ??? */
780 if (cur_symbols->flags & ANSI_SYMBOL)
781 fprintf (outf,
782 "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
783 else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
784 fprintf (outf,
785 "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
786 ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
787 : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
788 else if (cur_symbols->flags & XOPEN_SYMBOL)
790 fprintf (outf,
791 "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
792 || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
794 else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
796 fprintf (outf,
797 "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
798 || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
800 else
802 fatal ("internal error for function %s", fn->fname);
804 if_was_emitted = 1;
807 /* In the case of memmove, protect in case the application
808 defines it as a macro before including the header. */
809 if (!strcmp (fn->fname, "memmove")
810 || !strcmp (fn->fname, "putc")
811 || !strcmp (fn->fname, "getc")
812 || !strcmp (fn->fname, "vprintf")
813 || !strcmp (fn->fname, "vfprintf")
814 || !strcmp (fn->fname, "vsprintf")
815 || !strcmp (fn->fname, "rewinddir")
816 || !strcmp (fn->fname, "abort"))
817 macro_protect = 1;
819 if (macro_protect)
820 fprintf (outf, "#ifndef %s\n", fn->fname);
821 fprintf (outf, "extern %s %s (%s);\n",
822 fn->rtype, fn->fname, fn->params);
823 if (macro_protect)
824 fprintf (outf, "#endif\n");
826 if (if_was_emitted)
827 fprintf (outf,
828 "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
830 if (required_unseen_count)
832 #ifdef NO_IMPLICIT_EXTERN_C
833 fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
834 #endif
837 switch (special_file_handling)
839 case errno_h:
840 if (!seen_errno)
841 fprintf (outf, "extern int errno;\n");
842 break;
843 case stdlib_h:
844 if (!seen_EXIT_FAILURE)
845 fprintf (outf, "#define EXIT_FAILURE 1\n");
846 if (!seen_EXIT_SUCCESS)
847 fprintf (outf, "#define EXIT_SUCCESS 0\n");
848 break;
849 case sys_stat_h:
850 if (!seen_S_ISBLK && seen_S_IFBLK)
851 fprintf (outf,
852 "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
853 if (!seen_S_ISCHR && seen_S_IFCHR)
854 fprintf (outf,
855 "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
856 if (!seen_S_ISDIR && seen_S_IFDIR)
857 fprintf (outf,
858 "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
859 if (!seen_S_ISFIFO && seen_S_IFIFO)
860 fprintf (outf,
861 "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
862 if (!seen_S_ISLNK && seen_S_IFLNK)
863 fprintf (outf,
864 "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
865 if (!seen_S_ISREG && seen_S_IFREG)
866 fprintf (outf,
867 "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
868 break;
870 default:
871 break;
876 /* Returns 1 iff the file is properly protected from multiple inclusion:
877 #ifndef PROTECT_NAME
878 #define PROTECT_NAME
879 #endif
883 #define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
884 #define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
886 static int
887 inf_skip_spaces (int c)
889 for (;;)
891 if (c == ' ' || c == '\t')
892 c = INF_GET ();
893 else if (c == '/')
895 c = INF_GET ();
896 if (c != '*')
898 (void) INF_UNGET (c);
899 return '/';
901 c = INF_GET ();
902 for (;;)
904 if (c == EOF)
905 return EOF;
906 else if (c != '*')
908 if (c == '\n')
909 source_lineno++, lineno++;
910 c = INF_GET ();
912 else if ((c = INF_GET ()) == '/')
913 return INF_GET ();
916 else
917 break;
919 return c;
922 /* Read into STR from inf_buffer upto DELIM. */
924 static int
925 inf_read_upto (sstring *str, int delim)
927 int ch;
928 for (;;)
930 ch = INF_GET ();
931 if (ch == EOF || ch == delim)
932 break;
933 SSTRING_PUT (str, ch);
935 MAKE_SSTRING_SPACE (str, 1);
936 *str->ptr = 0;
937 return ch;
940 static int
941 inf_scan_ident (sstring *s, int c)
943 s->ptr = s->base;
944 if (ISIDST (c))
946 for (;;)
948 SSTRING_PUT (s, c);
949 c = INF_GET ();
950 if (c == EOF || !(ISIDNUM (c)))
951 break;
954 MAKE_SSTRING_SPACE (s, 1);
955 *s->ptr = 0;
956 return c;
959 /* Returns 1 if the file is correctly protected against multiple
960 inclusion, setting *ifndef_line to the line number of the initial #ifndef
961 and setting *endif_line to the final #endif.
962 Otherwise return 0. */
964 static int
965 check_protection (int *ifndef_line, int *endif_line)
967 int c;
968 int if_nesting = 1; /* Level of nesting of #if's */
969 char *protect_name = NULL; /* Identifier following initial #ifndef */
970 int define_seen = 0;
972 /* Skip initial white space (including comments). */
973 for (;; lineno++)
975 c = inf_skip_spaces (' ');
976 if (c == EOF)
977 return 0;
978 if (c != '\n')
979 break;
981 if (c != '#')
982 return 0;
983 c = inf_scan_ident (&buf, inf_skip_spaces (' '));
984 if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
985 return 0;
987 /* So far so good: We've seen an initial #ifndef. */
988 *ifndef_line = lineno;
989 c = inf_scan_ident (&buf, inf_skip_spaces (c));
990 if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
991 return 0;
992 protect_name = xstrdup (buf.base);
994 (void) INF_UNGET (c);
995 c = inf_read_upto (&buf, '\n');
996 if (c == EOF)
997 return 0;
998 lineno++;
1000 for (;;)
1002 c = inf_skip_spaces (' ');
1003 if (c == EOF)
1004 return 0;
1005 if (c == '\n')
1007 lineno++;
1008 continue;
1010 if (c != '#')
1011 goto skip_to_eol;
1012 c = inf_scan_ident (&buf, inf_skip_spaces (' '));
1013 if (SSTRING_LENGTH (&buf) == 0)
1015 else if (!strcmp (buf.base, "ifndef")
1016 || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
1018 if_nesting++;
1020 else if (!strcmp (buf.base, "endif"))
1022 if_nesting--;
1023 if (if_nesting == 0)
1024 break;
1026 else if (!strcmp (buf.base, "else"))
1028 if (if_nesting == 1)
1029 return 0;
1031 else if (!strcmp (buf.base, "define"))
1033 c = inf_skip_spaces (c);
1034 c = inf_scan_ident (&buf, c);
1035 if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
1036 define_seen = 1;
1038 skip_to_eol:
1039 for (;;)
1041 if (c == '\n' || c == EOF)
1042 break;
1043 c = INF_GET ();
1045 if (c == EOF)
1046 return 0;
1047 lineno++;
1050 if (!define_seen)
1051 return 0;
1052 *endif_line = lineno;
1053 /* Skip final white space (including comments). */
1054 for (;;)
1056 c = inf_skip_spaces (' ');
1057 if (c == EOF)
1058 break;
1059 if (c != '\n')
1060 return 0;
1063 return 1;
1066 extern int main (int, char **);
1069 main (int argc, char **argv)
1071 int inf_fd;
1072 struct stat sbuf;
1073 int c;
1074 #ifdef FIXPROTO_IGNORE_LIST
1075 int i;
1076 #endif
1077 const char *cptr;
1078 int ifndef_line;
1079 int endif_line;
1080 long to_read;
1081 long int inf_size;
1082 struct symbol_list *cur_symbols;
1084 progname = "fix-header";
1085 if (argv[0] && argv[0][0])
1087 char *p;
1089 progname = 0;
1090 for (p = argv[0]; *p; p++)
1091 if (*p == '/')
1092 progname = p;
1093 progname = progname ? progname+1 : argv[0];
1096 if (argc < 4)
1098 fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
1099 progname);
1100 exit (FATAL_EXIT_CODE);
1103 inc_filename = argv[1];
1104 inc_filename_length = strlen (inc_filename);
1106 #ifdef FIXPROTO_IGNORE_LIST
1107 for (i = 0; files_to_ignore[i] != NULL; i++)
1109 const char *const ignore_name = files_to_ignore[i];
1110 int ignore_len = strlen (ignore_name);
1111 if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
1113 if (ignore_name[ignore_len-1] == '/'
1114 || inc_filename[ignore_len] == '\0')
1116 if (verbose)
1117 fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
1118 exit (SUCCESS_EXIT_CODE);
1123 #endif
1125 if (strcmp (inc_filename, "sys/stat.h") == 0)
1126 special_file_handling = sys_stat_h;
1127 else if (strcmp (inc_filename, "errno.h") == 0)
1128 special_file_handling = errno_h, required_other++;
1129 else if (strcmp (inc_filename, "stdlib.h") == 0)
1130 special_file_handling = stdlib_h, required_other+=2;
1131 else if (strcmp (inc_filename, "stdio.h") == 0)
1132 special_file_handling = stdio_h;
1133 include_entry = std_include_table;
1134 while (include_entry->name != NULL
1135 && ((strcmp (include_entry->name, CONTINUED) == 0)
1136 || strcmp (inc_filename, include_entry->name) != 0))
1137 include_entry++;
1139 if (include_entry->name != NULL)
1141 const struct std_include_entry *entry;
1142 cur_symbol_table_size = 0;
1143 for (entry = include_entry; ;)
1145 if (entry->flags)
1146 add_symbols (entry->flags, entry->names);
1147 entry++;
1148 if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
1149 break;
1152 else
1153 symbol_table[0].names = NULL;
1155 /* Count and mark the prototypes required for this include file. */
1156 for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
1158 int name_len;
1159 if (cur_symbols->flags & MACRO_SYMBOL)
1160 continue;
1161 cptr = cur_symbols->names;
1162 for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
1164 struct fn_decl *fn = lookup_std_proto (cptr, name_len);
1165 required_unseen_count++;
1166 if (fn == NULL)
1167 fprintf (stderr, "Internal error: No prototype for %s\n", cptr);
1168 else
1169 SET_REQUIRED (fn);
1173 read_scan_file (argv[2], argc - 4, argv + 4);
1175 inf_fd = open (argv[2], O_RDONLY, 0666);
1176 if (inf_fd < 0)
1178 fprintf (stderr, "%s: Cannot open '%s' for reading -",
1179 progname, argv[2]);
1180 perror (NULL);
1181 exit (FATAL_EXIT_CODE);
1183 if (fstat (inf_fd, &sbuf) < 0)
1185 fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
1186 perror (NULL);
1187 exit (FATAL_EXIT_CODE);
1189 inf_size = sbuf.st_size;
1190 inf_buffer = xmalloc (inf_size + 2);
1191 inf_ptr = inf_buffer;
1193 to_read = inf_size;
1194 while (to_read > 0)
1196 long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
1197 if (i < 0)
1199 fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
1200 perror (NULL);
1201 exit (FATAL_EXIT_CODE);
1203 if (i == 0)
1205 inf_size -= to_read;
1206 break;
1208 to_read -= i;
1211 close (inf_fd);
1213 /* Inf_size may have changed if read was short (as on VMS) */
1214 inf_buffer[inf_size] = '\n';
1215 inf_buffer[inf_size + 1] = '\0';
1216 inf_limit = inf_buffer + inf_size;
1218 /* If file doesn't end with '\n', add one. */
1219 if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
1220 inf_limit++;
1222 unlink (argv[3]);
1223 outf = fopen (argv[3], "w");
1224 if (outf == NULL)
1226 fprintf (stderr, "%s: Cannot open '%s' for writing -",
1227 progname, argv[3]);
1228 perror (NULL);
1229 exit (FATAL_EXIT_CODE);
1232 lineno = 1;
1234 if (check_protection (&ifndef_line, &endif_line))
1236 lbrac_line = ifndef_line+1;
1237 rbrac_line = endif_line;
1239 else
1241 lbrac_line = 1;
1242 rbrac_line = -1;
1245 /* Reset input file. */
1246 inf_ptr = inf_buffer;
1247 lineno = 1;
1249 for (;;)
1251 if (lineno == lbrac_line)
1252 write_lbrac ();
1253 if (lineno == rbrac_line)
1254 write_rbrac ();
1255 for (;;)
1257 struct fn_decl *fn;
1258 c = INF_GET ();
1259 if (c == EOF)
1260 break;
1261 if (ISIDST (c))
1263 c = inf_scan_ident (&buf, c);
1264 (void) INF_UNGET (c);
1265 fputs (buf.base, outf);
1266 fn = lookup_std_proto (buf.base, strlen (buf.base));
1267 /* We only want to edit the declaration matching the one
1268 seen by scan-decls, as there can be multiple
1269 declarations, selected by #ifdef __STDC__ or whatever. */
1270 if (fn && fn->partial && fn->partial->line_seen == lineno)
1272 c = inf_skip_spaces (' ');
1273 if (c == EOF)
1274 break;
1275 if (c == '(')
1277 c = inf_skip_spaces (' ');
1278 if (c == ')')
1280 fprintf (outf, " _PARAMS((%s))", fn->params);
1282 else
1284 putc ('(', outf);
1285 (void) INF_UNGET (c);
1288 else
1289 fprintf (outf, " %c", c);
1292 else
1294 putc (c, outf);
1295 if (c == '\n')
1296 break;
1299 if (c == EOF)
1300 break;
1301 lineno++;
1303 if (rbrac_line < 0)
1304 write_rbrac ();
1306 fclose (outf);
1308 return 0;