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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [fix-header.c] - Blame information for rev 645

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/* fix-header.c - Make C header file suitable for C++.
   Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
   2002, 2003, 2004, 2006, 2007  Free Software Foundation, Inc.
 
   This program is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by the
   Free Software Foundation; either version 3, 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; see the file COPYING3.  If not see
   <http://www.gnu.org/licenses/>.  */
 
/* This program massages a system include file (such as stdio.h),
   into a form that is compatible with GNU C and GNU C++.
 
   * extern "C" { ... } braces are added (inside #ifndef __cplusplus),
   if they seem to be needed.  These prevent C++ compilers from name
   mangling the functions inside the braces.
 
   * If an old-style incomplete function declaration is seen (without
   an argument list), and it is a "standard" function listed in
   the file sys-protos.h (and with a non-empty argument list), then
   the declaration is converted to a complete prototype by replacing
   the empty parameter list with the argument list from sys-protos.h.
 
   * The program can be given a list of (names of) required standard
   functions (such as fclose for stdio.h).  If a required function
   is not seen in the input, then a prototype for it will be
   written to the output.
 
   * If all of the non-comment code of the original file is protected
   against multiple inclusion:
        #ifndef FOO
        #define FOO
        <body of include file>
        #endif
   then extra matter added to the include file is placed inside the <body>.
 
   * If the input file is OK (nothing needs to be done);
   the output file is not written (nor removed if it exists).
 
   There are also some special actions that are done for certain
   well-known standard include files:
 
   * If argv[1] is "sys/stat.h", the Posix.1 macros
   S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if
   they were missing, and the corresponding "traditional" S_IFxxx
   macros were defined.
 
   * If argv[1] is "errno.h", errno is declared if it was missing.
 
   * TODO:  The input file should be read complete into memory, because:
   a) it needs to be scanned twice anyway, and
   b) it would be nice to allow update in place.
 
   Usage:
        fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS]
   where:
   * FOO.H is the relative file name of the include file,
   as it would be #include'd by a C file.  (E.g. stdio.h)
   * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h)
   * OUTFILE.H is the full pathname for where to write the output file,
   if anything needs to be done.  (e.g. ./include/stdio.h)
   * OPTIONS can be -D or -I switches as you would pass to cpp.
 
   Written by Per Bothner <bothner@cygnus.com>, July 1993.  */
 
#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "obstack.h"
#include "scan.h"
#include "cpplib.h"
#include "c-incpath.h"
#include "errors.h"
 
#ifdef TARGET_EXTRA_INCLUDES
void
TARGET_EXTRA_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
                       const char *iprefix ATTRIBUTE_UNUSED,
                       int stdinc ATTRIBUTE_UNUSED)
{
}
#endif
 
#ifdef TARGET_EXTRA_PRE_INCLUDES 
void
TARGET_EXTRA_PRE_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED,
                           const char *iprefix ATTRIBUTE_UNUSED,
                           int stdinc ATTRIBUTE_UNUSED)
{
}
#endif
 
struct line_maps line_table;
 
sstring buf;
 
int verbose = 0;
int partial_count = 0;
int warnings = 0;
 
#if ADD_MISSING_EXTERN_C
int missing_extern_C_count = 0;
#endif
 
#include "xsys-protos.h"
 
#ifdef FIXPROTO_IGNORE_LIST
/* This is a currently unused feature.  */
 
/* List of files and directories to ignore.
   A directory name (ending in '/') means ignore anything in that
   directory.  (It might be more efficient to do directory pruning
   earlier in fixproto, but this is simpler and easier to customize.) */
 
static const char *const files_to_ignore[] = {
  "X11/",
  FIXPROTO_IGNORE_LIST
 
};
#endif
 
char *inf_buffer;
char *inf_limit;
char *inf_ptr;
static const char *cur_file;
 
/* Certain standard files get extra treatment */
 
enum special_file
{
  no_special,
#ifdef errno_h
#undef errno_h
#endif
  errno_h,
#ifdef stdio_h
#undef stdio_h
#endif
  stdio_h,
#ifdef stdlib_h
#undef stdlib_h
#endif
  stdlib_h,
#ifdef sys_stat_h
#undef sys_stat_h
#endif
  sys_stat_h
};
 
/* A NAMELIST is a sequence of names, separated by '\0', and terminated
   by an empty name (i.e. by "\0\0").  */
 
typedef const char *namelist;
 
/* The following macros provide the bits for symbol_flags.  */
typedef int symbol_flags;
 
/* Used to mark names defined in the ANSI/ISO C standard.  */
#define ANSI_SYMBOL 1
 
/* We no longer massage include files for POSIX or XOPEN symbols,
   as there are now several versions of the POSIX and XOPEN standards,
   and it would be a maintenance nightmare for us to track them all.
   Better to be compatible with the system include files.  */
/*#define ADD_MISSING_POSIX 1 */
/*#define ADD_MISSING_XOPEN 1 */
 
#if ADD_MISSING_POSIX
/* Used to mark names defined in the Posix.1 or Posix.2 standard.  */
#define POSIX1_SYMBOL 2
#define POSIX2_SYMBOL 4
#else
#define POSIX1_SYMBOL 0
#define POSIX2_SYMBOL 0
#endif
 
#if ADD_MISSING_XOPEN
/* Used to mark names defined in X/Open Portability Guide.  */
#define XOPEN_SYMBOL 8
/* Used to mark names defined in X/Open UNIX Extensions.  */
#define XOPEN_EXTENDED_SYMBOL 16
#else
#define XOPEN_SYMBOL 0
#define XOPEN_EXTENDED_SYMBOL 0
#endif
 
/* Used to indicate names that are not functions */
#define MACRO_SYMBOL 512
 
struct symbol_list {
  symbol_flags flags;
  namelist names;
};
 
#define SYMBOL_TABLE_SIZE 10
struct symbol_list symbol_table[SYMBOL_TABLE_SIZE];
int cur_symbol_table_size;
 
static void add_symbols (symbol_flags, namelist);
static struct fn_decl *lookup_std_proto (const char *, int);
static void write_lbrac (void);
static void recognized_macro (const char *);
static void check_macro_names (cpp_reader *, namelist);
static void read_scan_file (char *, int, char **);
static void write_rbrac (void);
static int inf_skip_spaces (int);
static int inf_read_upto (sstring *, int);
static int inf_scan_ident (sstring *, int);
static int check_protection (int *, int *);
static void cb_file_change (cpp_reader *, const struct line_map *);
 
static void
add_symbols (symbol_flags flags, namelist names)
{
  symbol_table[cur_symbol_table_size].flags = flags;
  symbol_table[cur_symbol_table_size].names = names;
  cur_symbol_table_size++;
  if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE)
    fatal ("too many calls to add_symbols");
  symbol_table[cur_symbol_table_size].names = NULL; /* Termination.  */
}
 
struct std_include_entry {
  const char *const name;
  const symbol_flags flags;
  const namelist names;
};
 
const char NONE[] = "";  /* The empty namelist.  */
 
/* Special name to indicate a continuation line in std_include_table.  */
const char CONTINUED[] = "";
 
const struct std_include_entry *include_entry;
 
const struct std_include_entry std_include_table [] = {
  { "ctype.h", ANSI_SYMBOL,
      "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\
isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" },
 
  { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"},
 
  { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" },
 
  /* ANSI_SYMBOL is wrong, but ...  */
  { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\
mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\
scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\
waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\
wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" },
 
  { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" },
 
  /* Maybe also "getgrent fgetgrent setgrent endgrent" */
  { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" },
 
/*{ "limit.h", ... provided by gcc }, */
 
  { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" },
 
  { "math.h", ANSI_SYMBOL,
      "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\
fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\
tan\0tanh\0" },
 
  { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" },
 
  { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" },
 
  /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf.  */
  { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" },
 
  /* Left out signal() - its prototype is too complex for us!
     Also left out "sigaction sigaddset sigdelset sigemptyset
     sigfillset sigismember sigpending sigprocmask sigsuspend"
     because these need sigset_t or struct sigaction.
     Most systems that provide them will also declare them.  */
  { "signal.h", ANSI_SYMBOL, "raise\0" },
  { CONTINUED, POSIX1_SYMBOL, "kill\0" },
 
  { "stdio.h", ANSI_SYMBOL,
      "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\
fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\
fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\
printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\
setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\
tmpnam\0ungetc\0" },
  { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" },
  { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" },  /* I think ...  */
/* Should perhaps also handle NULL, EOF, ... ? */
 
  /* "div ldiv", - ignored because these depend on div_t, ldiv_t
     ignore these: "mblen mbstowcs mbstowc wcstombs wctomb"
     Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions.
     Should perhaps also add NULL */
  { "stdlib.h", ANSI_SYMBOL,
      "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\
exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\
srand\0strtod\0strtol\0strtoul\0system\0" },
  { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" },
  { CONTINUED, POSIX1_SYMBOL, "putenv\0" },
 
  { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\
strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\
strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\
strtok\0strxfrm\0" },
/* Should perhaps also add NULL and size_t */
 
  { "strings.h", XOPEN_EXTENDED_SYMBOL,
      "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" },
 
  { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 
  /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines
     ioctl in <strops.h>.  However, many systems have it is sys/ioctl.h,
     and many systems do have <sys/ioctl.h> but not <strops.h>.  */
  { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" },
 
  { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" },
 
  { "sys/stat.h", POSIX1_SYMBOL,
      "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" },
  { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
      "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\
S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" },
  { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" },
 
#if 0
/* How do we handle fd_set? */
  { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" },
  { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" },
#endif
 
  { "sys/times.h", POSIX1_SYMBOL, "times\0" },
  /* "sys/types.h" add types (not in old g++-include) */
 
  { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" },
 
  { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" },
  { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL,
      "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\
WTERMSIG\0WNOHANG\0WNOTRACED\0" },
 
  { "tar.h", POSIX1_SYMBOL, NONE },
 
  { "termios.h", POSIX1_SYMBOL,
      "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" },
 
  { "time.h", ANSI_SYMBOL,
      "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" },
  { CONTINUED, POSIX1_SYMBOL, "tzset\0" },
 
  { "unistd.h", POSIX1_SYMBOL,
      "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\
dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\
getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\
getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\
setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\
ttyname\0unlink\0write\0" },
  { CONTINUED, POSIX2_SYMBOL, "getopt\0" },
  { CONTINUED, XOPEN_EXTENDED_SYMBOL,
      "lockf\0gethostid\0gethostname\0readlink\0symlink\0" },
 
  { "utime.h", POSIX1_SYMBOL, "utime\0" },
 
  { NULL, 0, NONE }
};
 
enum special_file special_file_handling = no_special;
 
/* They are set if the corresponding macro has been seen.  */
/* The following are only used when handling sys/stat.h */
int seen_S_IFBLK = 0, seen_S_ISBLK  = 0;
int seen_S_IFCHR = 0, seen_S_ISCHR  = 0;
int seen_S_IFDIR = 0, seen_S_ISDIR  = 0;
int seen_S_IFIFO = 0, seen_S_ISFIFO = 0;
int seen_S_IFLNK = 0, seen_S_ISLNK  = 0;
int seen_S_IFREG = 0, seen_S_ISREG  = 0;
/* The following are only used when handling errno.h */
int seen_errno = 0;
/* The following are only used when handling stdlib.h */
int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0;
 
struct obstack scan_file_obstack;
 
/* NOTE:  If you edit this, also edit gen-protos.c !! */
 
static struct fn_decl *
lookup_std_proto (const char *name, int name_length)
{
  int i = hashstr (name, name_length) % HASH_SIZE;
  int i0 = i;
  for (;;)
    {
      struct fn_decl *fn;
      if (hash_tab[i] == 0)
        return NULL;
      fn = &std_protos[hash_tab[i]];
      if ((int) strlen (fn->fname) == name_length
          && strncmp (fn->fname, name, name_length) == 0)
        return fn;
      i = (i+1) % HASH_SIZE;
      gcc_assert (i != i0);
    }
}
 
char *inc_filename;
int inc_filename_length;
FILE *outf;
sstring line;
 
int lbrac_line, rbrac_line;
 
int required_unseen_count = 0;
int required_other = 0;
 
static void
write_lbrac (void)
{
  if (partial_count)
    {
      fprintf (outf, "#ifndef _PARAMS\n");
      fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n");
      fprintf (outf, "#define _PARAMS(ARGS) ARGS\n");
      fprintf (outf, "#else\n");
      fprintf (outf, "#define _PARAMS(ARGS) ()\n");
      fprintf (outf, "#endif\n#endif /* _PARAMS */\n");
    }
}
 
struct partial_proto
{
  struct partial_proto *next;
  struct fn_decl *fn;
  int line_seen;
};
 
struct partial_proto *partial_proto_list = NULL;
 
struct partial_proto required_dummy_proto, seen_dummy_proto;
#define REQUIRED(FN) ((FN)->partial == &required_dummy_proto)
#define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto)
#define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto)
#define SEEN(FN) ((FN)->partial == &seen_dummy_proto)
 
static void
recognized_macro (const char *fname)
{
  /* The original include file defines fname as a macro.  */
  struct fn_decl *fn = lookup_std_proto (fname, strlen (fname));
 
  /* Since fname is a macro, don't require a prototype for it.  */
  if (fn)
    {
      if (REQUIRED (fn))
        required_unseen_count--;
      SET_SEEN (fn);
    }
 
  switch (special_file_handling)
    {
    case errno_h:
      if (strcmp (fname, "errno") == 0 && !seen_errno)
        seen_errno = 1, required_other--;
      break;
    case stdlib_h:
      if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE)
        seen_EXIT_FAILURE = 1, required_other--;
      if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS)
        seen_EXIT_SUCCESS = 1, required_other--;
      break;
    case sys_stat_h:
      if (fname[0] == 'S' && fname[1] == '_')
        {
          if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++;
          else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++;
          else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++;
          else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++;
          else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++;
          else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++;
          else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++;
          else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++;
          else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++;
          else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++;
          else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++;
          else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++;
        }
      break;
 
    default:
      break;
    }
}
 
void
recognized_extern (const cpp_token *name)
{
  switch (special_file_handling)
    {
    case errno_h:
      if (cpp_ideq (name, "errno"))
        seen_errno = 1, required_other--;
      break;
 
    default:
      break;
    }
}
 
/* Called by scan_decls if it saw a function definition for a function
   named FNAME.  KIND is 'I' for an inline function; 'F' if a normal
   function declaration preceded by 'extern "C"' (or nested inside
   'extern "C"' braces); or 'f' for other function declarations.  */
 
void
recognized_function (const cpp_token *fname, unsigned int line, int kind,
                     int have_arg_list)
{
  struct partial_proto *partial;
  int i;
  struct fn_decl *fn;
 
  fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node),
                         NODE_LEN (fname->val.node));
 
  /* Remove the function from the list of required function.  */
  if (fn)
    {
      if (REQUIRED (fn))
        required_unseen_count--;
      SET_SEEN (fn);
    }
 
  /* If we have a full prototype, we're done.  */
  if (have_arg_list)
    return;
 
  if (kind == 'I')  /* don't edit inline function */
    return;
 
  /* If the partial prototype was included from some other file,
     we don't need to patch it up (in this run).  */
  i = strlen (cur_file);
  if (i < inc_filename_length
      || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0)
    return;
 
  if (fn == NULL)
    return;
  if (fn->params[0] == '\0')
    return;
 
  /* We only have a partial function declaration,
     so remember that we have to add a complete prototype.  */
  partial_count++;
  partial = obstack_alloc (&scan_file_obstack, sizeof (struct partial_proto));
  partial->line_seen = line;
  partial->fn = fn;
  fn->partial = partial;
  partial->next = partial_proto_list;
  partial_proto_list = partial;
  if (verbose)
    {
      fprintf (stderr, "(%s: %s non-prototype function declaration.)\n",
               inc_filename, fn->fname);
    }
}
 
/* For any name in NAMES that is defined as a macro,
   call recognized_macro on it.  */
 
static void
check_macro_names (cpp_reader *pfile, namelist names)
{
  size_t len;
  while (*names)
    {
      len = strlen (names);
      if (cpp_defined (pfile, (const unsigned char *)names, len))
        recognized_macro (names);
      names += len + 1;
    }
}
 
static void
cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED,
                const struct line_map *map)
{
  /* Just keep track of current file name.  */
  cur_file = map == NULL ? NULL : map->to_file;
}
 
static void
read_scan_file (char *in_fname, int argc, char **argv)
{
  cpp_reader *scan_in;
  cpp_callbacks *cb;
  cpp_options *options;
  struct fn_decl *fn;
  int i, strings_processed;
  struct symbol_list *cur_symbols;
 
  obstack_init (&scan_file_obstack);
 
  linemap_init (&line_table);
  scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table);
  cb = cpp_get_callbacks (scan_in);
  cb->file_change = cb_file_change;
 
  /* We are going to be scanning a header file out of its proper context,
     so ignore warnings and errors.  */
  options = cpp_get_options (scan_in);
  options->inhibit_warnings = 1;
  options->inhibit_errors = 1;
  cpp_post_options (scan_in);
 
  if (!cpp_read_main_file (scan_in, in_fname))
    exit (FATAL_EXIT_CODE);
 
  cpp_change_file (scan_in, LC_RENAME, "<built-in>");
  cpp_init_builtins (scan_in, true);
  cpp_change_file (scan_in, LC_RENAME, in_fname);
 
  /* Process switches after builtins so -D can override them.  */
  for (i = 0; i < argc; i += strings_processed)
    {
      strings_processed = 0;
      if (argv[i][0] == '-')
        {
          if (argv[i][1] == 'I')
            {
              if (argv[i][2] != '\0')
                {
                  strings_processed = 1;
                  add_path (xstrdup (argv[i] + 2), BRACKET, false, false);
                }
              else if (i + 1 != argc)
                {
                  strings_processed = 2;
                  add_path (xstrdup (argv[i + 1]), BRACKET, false, false);
                }
            }
          else if (argv[i][1] == 'D')
            {
              if (argv[i][2] != '\0')
                strings_processed = 1, cpp_define (scan_in, argv[i] + 2);
              else if (i + 1 != argc)
                strings_processed = 2, cpp_define (scan_in, argv[i + 1]);
            }
        }
 
      if (strings_processed == 0)
        break;
    }
 
  if (i < argc)
    cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]);
  if (cpp_errors (scan_in))
    exit (FATAL_EXIT_CODE);
 
  register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */,
                           NULL /* imultilib */, true /* stdinc */,
                           false /* cxx_stdinc */, false /* verbose */);
 
  /* We are scanning a system header, so mark it as such.  */
  cpp_make_system_header (scan_in, 1, 0);
 
  scan_decls (scan_in, argc, argv);
  for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
    check_macro_names (scan_in, cur_symbols->names);
 
  /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf.
     If so, those functions are also required.  */
  if (special_file_handling == stdio_h
      && (fn = lookup_std_proto ("_filbuf", 7)) != NULL)
    {
      unsigned char getchar_call[] = "getchar();\n";
      int seen_filbuf = 0;
 
      /* Scan the macro expansion of "getchar();".  */
      cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1,
                       /* from_stage3 */ true);
      for (;;)
        {
          const cpp_token *t = cpp_get_token (scan_in);
 
          if (t->type == CPP_EOF)
            break;
          else if (cpp_ideq (t, "_filbuf"))
            seen_filbuf++;
        }
 
      if (seen_filbuf)
        {
          int need_filbuf = !SEEN (fn) && !REQUIRED (fn);
          struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7);
          int need_flsbuf
            = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn);
 
          /* Append "_filbuf" and/or "_flsbuf" to the required functions.  */
          if (need_filbuf + need_flsbuf)
            {
              const char *new_list;
              if (need_filbuf)
                SET_REQUIRED (fn);
              if (need_flsbuf)
                SET_REQUIRED (flsbuf_fn);
              if (need_flsbuf && need_filbuf)
                new_list = "_filbuf\0_flsbuf\0";
              else if (need_flsbuf)
                new_list = "_flsbuf\0";
              else /* if (need_flsbuf) */
                new_list = "_filbuf\0";
              add_symbols (ANSI_SYMBOL, new_list);
              required_unseen_count += need_filbuf + need_flsbuf;
            }
        }
    }
 
  if (required_unseen_count + partial_count + required_other == 0)
    {
      if (verbose)
        fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename);
      exit (SUCCESS_EXIT_CODE);
    }
  if (!verbose)
    fprintf (stderr, "%s: fixing %s\n", progname, inc_filename);
  else
    {
      if (required_unseen_count)
        fprintf (stderr, "%s: %d missing function declarations.\n",
                 inc_filename, required_unseen_count);
      if (partial_count)
        fprintf (stderr, "%s: %d non-prototype function declarations.\n",
                 inc_filename, partial_count);
    }
}
 
static void
write_rbrac (void)
{
  struct fn_decl *fn;
  const char *cptr;
  struct symbol_list *cur_symbols;
 
  if (required_unseen_count)
    {
#ifdef NO_IMPLICIT_EXTERN_C
      fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n");
#endif
    }
 
  /* Now we print out prototypes for those functions that we haven't seen.  */
  for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
    {
      int if_was_emitted = 0;
      int name_len;
      cptr = cur_symbols->names;
      for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
        {
          int macro_protect = 0;
 
          if (cur_symbols->flags & MACRO_SYMBOL)
            continue;
 
          fn = lookup_std_proto (cptr, name_len);
          if (fn == NULL || !REQUIRED (fn))
            continue;
 
          if (!if_was_emitted)
            {
/*            what about curses. ??? or _flsbuf/_filbuf ??? */
              if (cur_symbols->flags & ANSI_SYMBOL)
                fprintf (outf,
         "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n");
              else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL))
                fprintf (outf,
       "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\
    ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\
    : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n");
              else if (cur_symbols->flags & XOPEN_SYMBOL)
                {
                fprintf (outf,
       "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
   || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n");
                }
              else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL)
                {
                fprintf (outf,
       "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\
   || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n");
                }
              else
                {
                  fatal ("internal error for function %s", fn->fname);
                }
              if_was_emitted = 1;
            }
 
          /* In the case of memmove, protect in case the application
             defines it as a macro before including the header.  */
          if (!strcmp (fn->fname, "memmove")
              || !strcmp (fn->fname, "putc")
              || !strcmp (fn->fname, "getc")
              || !strcmp (fn->fname, "vprintf")
              || !strcmp (fn->fname, "vfprintf")
              || !strcmp (fn->fname, "vsprintf")
              || !strcmp (fn->fname, "rewinddir")
              || !strcmp (fn->fname, "abort"))
            macro_protect = 1;
 
          if (macro_protect)
            fprintf (outf, "#ifndef %s\n", fn->fname);
          fprintf (outf, "extern %s %s (%s);\n",
                   fn->rtype, fn->fname, fn->params);
          if (macro_protect)
            fprintf (outf, "#endif\n");
        }
      if (if_was_emitted)
        fprintf (outf,
                 "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n");
    }
  if (required_unseen_count)
    {
#ifdef NO_IMPLICIT_EXTERN_C
      fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n");
#endif
    }
 
  switch (special_file_handling)
    {
    case errno_h:
      if (!seen_errno)
        fprintf (outf, "extern int errno;\n");
      break;
    case stdlib_h:
      if (!seen_EXIT_FAILURE)
        fprintf (outf, "#define EXIT_FAILURE 1\n");
      if (!seen_EXIT_SUCCESS)
        fprintf (outf, "#define EXIT_SUCCESS 0\n");
      break;
    case sys_stat_h:
      if (!seen_S_ISBLK && seen_S_IFBLK)
        fprintf (outf,
                 "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n");
      if (!seen_S_ISCHR && seen_S_IFCHR)
        fprintf (outf,
                 "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n");
      if (!seen_S_ISDIR && seen_S_IFDIR)
        fprintf (outf,
                 "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n");
      if (!seen_S_ISFIFO && seen_S_IFIFO)
        fprintf (outf,
                 "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n");
      if (!seen_S_ISLNK && seen_S_IFLNK)
        fprintf (outf,
                 "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n");
      if (!seen_S_ISREG && seen_S_IFREG)
        fprintf (outf,
                 "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n");
      break;
 
    default:
      break;
    }
 
}
 
/* Returns 1 iff the file is properly protected from multiple inclusion:
   #ifndef PROTECT_NAME
   #define PROTECT_NAME
   #endif
 
 */
 
#define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF)
#define INF_UNGET(c) ((c)!=EOF && inf_ptr--)
 
static int
inf_skip_spaces (int c)
{
  for (;;)
    {
      if (c == ' ' || c == '\t')
        c = INF_GET ();
      else if (c == '/')
        {
          c = INF_GET ();
          if (c != '*')
            {
              (void) INF_UNGET (c);
              return '/';
            }
          c = INF_GET ();
          for (;;)
            {
              if (c == EOF)
                return EOF;
              else if (c != '*')
                {
                  if (c == '\n')
                    source_lineno++, lineno++;
                  c = INF_GET ();
                }
              else if ((c = INF_GET ()) == '/')
                return INF_GET ();
            }
        }
      else
        break;
    }
  return c;
}
 
/* Read into STR from inf_buffer upto DELIM.  */
 
static int
inf_read_upto (sstring *str, int delim)
{
  int ch;
  for (;;)
    {
      ch = INF_GET ();
      if (ch == EOF || ch == delim)
        break;
      SSTRING_PUT (str, ch);
    }
  MAKE_SSTRING_SPACE (str, 1);
  *str->ptr = 0;
  return ch;
}
 
static int
inf_scan_ident (sstring *s, int c)
{
  s->ptr = s->base;
  if (ISIDST (c))
    {
      for (;;)
        {
          SSTRING_PUT (s, c);
          c = INF_GET ();
          if (c == EOF || !(ISIDNUM (c)))
            break;
        }
    }
  MAKE_SSTRING_SPACE (s, 1);
  *s->ptr = 0;
  return c;
}
 
/* Returns 1 if the file is correctly protected against multiple
   inclusion, setting *ifndef_line to the line number of the initial #ifndef
   and setting *endif_line to the final #endif.
   Otherwise return 0.  */
 
static int
check_protection (int *ifndef_line, int *endif_line)
{
  int c;
  int if_nesting = 1; /* Level of nesting of #if's */
  char *protect_name = NULL; /* Identifier following initial #ifndef */
  int define_seen = 0;
 
  /* Skip initial white space (including comments).  */
  for (;; lineno++)
    {
      c = inf_skip_spaces (' ');
      if (c == EOF)
        return 0;
      if (c != '\n')
        break;
    }
  if (c != '#')
    return 0;
  c = inf_scan_ident (&buf, inf_skip_spaces (' '));
  if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0)
    return 0;
 
  /* So far so good: We've seen an initial #ifndef.  */
  *ifndef_line = lineno;
  c = inf_scan_ident (&buf, inf_skip_spaces (c));
  if (SSTRING_LENGTH (&buf) == 0 || c == EOF)
    return 0;
  protect_name = xstrdup (buf.base);
 
  (void) INF_UNGET (c);
  c = inf_read_upto (&buf, '\n');
  if (c == EOF)
    return 0;
  lineno++;
 
  for (;;)
    {
      c = inf_skip_spaces (' ');
      if (c == EOF)
        return 0;
      if (c == '\n')
        {
          lineno++;
          continue;
        }
      if (c != '#')
        goto skip_to_eol;
      c = inf_scan_ident (&buf, inf_skip_spaces (' '));
      if (SSTRING_LENGTH (&buf) == 0)
        ;
      else if (!strcmp (buf.base, "ifndef")
          || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if"))
        {
          if_nesting++;
        }
      else if (!strcmp (buf.base, "endif"))
        {
          if_nesting--;
          if (if_nesting == 0)
            break;
        }
      else if (!strcmp (buf.base, "else"))
        {
          if (if_nesting == 1)
            return 0;
        }
      else if (!strcmp (buf.base, "define"))
        {
          c = inf_skip_spaces (c);
          c = inf_scan_ident (&buf, c);
          if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0)
            define_seen = 1;
        }
    skip_to_eol:
      for (;;)
        {
          if (c == '\n' || c == EOF)
            break;
          c = INF_GET ();
        }
      if (c == EOF)
        return 0;
      lineno++;
    }
 
  if (!define_seen)
     return 0;
  *endif_line = lineno;
  /* Skip final white space (including comments).  */
  for (;;)
    {
      c = inf_skip_spaces (' ');
      if (c == EOF)
        break;
      if (c != '\n')
        return 0;
    }
 
  return 1;
}
 
extern int main (int, char **);
 
int
main (int argc, char **argv)
{
  int inf_fd;
  struct stat sbuf;
  int c;
#ifdef FIXPROTO_IGNORE_LIST
  int i;
#endif
  const char *cptr;
  int ifndef_line;
  int endif_line;
  long to_read;
  long int inf_size;
  struct symbol_list *cur_symbols;
 
  progname = "fix-header";
  if (argv[0] && argv[0][0])
    {
      char *p;
 
      progname = 0;
      for (p = argv[0]; *p; p++)
        if (*p == '/')
          progname = p;
      progname = progname ? progname+1 : argv[0];
    }
 
  if (argc < 4)
    {
      fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n",
               progname);
      exit (FATAL_EXIT_CODE);
    }
 
  inc_filename = argv[1];
  inc_filename_length = strlen (inc_filename);
 
#ifdef FIXPROTO_IGNORE_LIST
  for (i = 0; files_to_ignore[i] != NULL; i++)
    {
      const char *const ignore_name = files_to_ignore[i];
      int ignore_len = strlen (ignore_name);
      if (strncmp (inc_filename, ignore_name, ignore_len) == 0)
        {
          if (ignore_name[ignore_len-1] == '/'
              || inc_filename[ignore_len] == '\0')
            {
              if (verbose)
                fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename);
              exit (SUCCESS_EXIT_CODE);
            }
        }
 
    }
#endif
 
  if (strcmp (inc_filename, "sys/stat.h") == 0)
    special_file_handling = sys_stat_h;
  else if (strcmp (inc_filename, "errno.h") == 0)
    special_file_handling = errno_h, required_other++;
  else if (strcmp (inc_filename, "stdlib.h") == 0)
    special_file_handling = stdlib_h, required_other+=2;
  else if (strcmp (inc_filename, "stdio.h") == 0)
    special_file_handling = stdio_h;
  include_entry = std_include_table;
  while (include_entry->name != NULL
         && ((strcmp (include_entry->name, CONTINUED) == 0)
             || strcmp (inc_filename, include_entry->name) != 0))
    include_entry++;
 
  if (include_entry->name != NULL)
    {
      const struct std_include_entry *entry;
      cur_symbol_table_size = 0;
      for (entry = include_entry; ;)
        {
          if (entry->flags)
            add_symbols (entry->flags, entry->names);
          entry++;
          if (!entry->name || strcmp (entry->name, CONTINUED) != 0)
            break;
        }
    }
  else
    symbol_table[0].names = NULL;
 
  /* Count and mark the prototypes required for this include file.  */
  for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++)
    {
      int name_len;
      if (cur_symbols->flags & MACRO_SYMBOL)
        continue;
      cptr = cur_symbols->names;
      for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1)
        {
          struct fn_decl *fn = lookup_std_proto (cptr, name_len);
          required_unseen_count++;
          if (fn == NULL)
            fprintf (stderr, "Internal error:  No prototype for %s\n", cptr);
          else
            SET_REQUIRED (fn);
        }
    }
 
  read_scan_file (argv[2], argc - 4, argv + 4);
 
  inf_fd = open (argv[2], O_RDONLY, 0666);
  if (inf_fd < 0)
    {
      fprintf (stderr, "%s: Cannot open '%s' for reading -",
               progname, argv[2]);
      perror (NULL);
      exit (FATAL_EXIT_CODE);
    }
  if (fstat (inf_fd, &sbuf) < 0)
    {
      fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]);
      perror (NULL);
      exit (FATAL_EXIT_CODE);
    }
  inf_size = sbuf.st_size;
  inf_buffer = XNEWVEC (char, inf_size + 2);
  inf_ptr = inf_buffer;
 
  to_read = inf_size;
  while (to_read > 0)
    {
      long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read);
      if (i < 0)
        {
          fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]);
          perror (NULL);
          exit (FATAL_EXIT_CODE);
        }
      if (i == 0)
        {
          inf_size -= to_read;
          break;
        }
      to_read -= i;
    }
 
  close (inf_fd);
 
  /* Inf_size may have changed if read was short (as on VMS) */
  inf_buffer[inf_size] = '\n';
  inf_buffer[inf_size + 1] = '\0';
  inf_limit = inf_buffer + inf_size;
 
  /* If file doesn't end with '\n', add one.  */
  if (inf_limit > inf_buffer && inf_limit[-1] != '\n')
    inf_limit++;
 
  unlink (argv[3]);
  outf = fopen (argv[3], "w");
  if (outf == NULL)
    {
      fprintf (stderr, "%s: Cannot open '%s' for writing -",
               progname, argv[3]);
      perror (NULL);
      exit (FATAL_EXIT_CODE);
    }
 
  lineno = 1;
 
  if (check_protection (&ifndef_line, &endif_line))
    {
      lbrac_line = ifndef_line+1;
      rbrac_line = endif_line;
    }
  else
    {
      lbrac_line = 1;
      rbrac_line = -1;
    }
 
  /* Reset input file.  */
  inf_ptr = inf_buffer;
  lineno = 1;
 
  for (;;)
    {
      if (lineno == lbrac_line)
        write_lbrac ();
      if (lineno == rbrac_line)
        write_rbrac ();
      for (;;)
        {
          struct fn_decl *fn;
          c = INF_GET ();
          if (c == EOF)
            break;
          if (ISIDST (c))
            {
              c = inf_scan_ident (&buf, c);
              (void) INF_UNGET (c);
              fputs (buf.base, outf);
              fn = lookup_std_proto (buf.base, strlen (buf.base));
              /* We only want to edit the declaration matching the one
                 seen by scan-decls, as there can be multiple
                 declarations, selected by #ifdef __STDC__ or whatever.  */
              if (fn && fn->partial && fn->partial->line_seen == lineno)
                {
                  c = inf_skip_spaces (' ');
                  if (c == EOF)
                    break;
                  if (c == '(')
                    {
                      c = inf_skip_spaces (' ');
                      if (c == ')')
                        {
                          fprintf (outf, " _PARAMS((%s))", fn->params);
                        }
                      else
                        {
                          putc ('(', outf);
                          (void) INF_UNGET (c);
                        }
                    }
                  else
                    fprintf (outf, " %c", c);
                }
            }
          else
            {
              putc (c, outf);
              if (c == '\n')
                break;
            }
        }
      if (c == EOF)
        break;
      lineno++;
    }
  if (rbrac_line < 0)
    write_rbrac ();
 
  fclose (outf);
 
  return 0;
}
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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [fix-header.c] - Blame information for rev 645

Line No.	Rev	Author	Line
1	38	julius	`/* fix-header.c - Make C header file suitable for C++.`
2			`Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,`
3			`2002, 2003, 2004, 2006, 2007 Free Software Foundation, Inc.`
4
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 3, or (at your option) any`
8			`later version.`
9
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.`
14
15			`You should have received a copy of the GNU General Public License`
16			`along with this program; see the file COPYING3. If not see`
17			`<http://www.gnu.org/licenses/>. */`
18
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++.`
21
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.`
25
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.`
31
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.`
36
37			`* If all of the non-comment code of the original file is protected`
38			`against multiple inclusion:`
39			`#ifndef FOO`
40			`#define FOO`