CbC/CbC_gcc: gcc/protoize.c comparison

comparison gcc/protoize.c @ 0:a06113de4d67

first commit

author	kent <kent@cr.ie.u-ryukyu.ac.jp>
date	Fri, 17 Jul 2009 14:47:48 +0900
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comparison

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--1:000000000000
+:a06113de4d67
+/* Protoize program - Original version by Ron Guilmette (rfg@segfault.us.com).
+Copyright (C) 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
+1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008 Free Software
+Foundation, Inc.
+This file is part of GCC.
+GCC 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.
+GCC 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 GCC; see the file COPYING3.  If not see
+<http://www.gnu.org/licenses/>.  */
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "intl.h"
+#include "cppdefault.h"
+#include <setjmp.h>
+#include <signal.h>
+#if ! defined( SIGCHLD ) && defined( SIGCLD )
+#  define SIGCHLD SIGCLD
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+#include "version.h"
+/* Include getopt.h for the sake of getopt_long.  */
+#include "getopt.h"
+/* Macro to see if the path elements match.  */
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+#define IS_SAME_PATH_CHAR(a,b) (TOUPPER (a) == TOUPPER (b))
+#else
+#define IS_SAME_PATH_CHAR(a,b) ((a) == (b))
+#endif
+/* Macro to see if the paths match.  */
+#define IS_SAME_PATH(a,b) (FILENAME_CMP (a, b) == 0)
+/* Suffix for aux-info files.  */
+#ifdef __MSDOS__
+#define AUX_INFO_SUFFIX "X"
+#else
+#define AUX_INFO_SUFFIX ".X"
+#endif
+/* Suffix for saved files.  */
+#ifdef __MSDOS__
+#define SAVE_SUFFIX "sav"
+#else
+#define SAVE_SUFFIX ".save"
+#endif
+/* Suffix for renamed C++ files.  */
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+#define CPLUS_FILE_SUFFIX "cc"
+#else
+#define CPLUS_FILE_SUFFIX "C"
+#endif
+static void usage (void) ATTRIBUTE_NORETURN;
+static void aux_info_corrupted (void) ATTRIBUTE_NORETURN;
+static void declare_source_confusing (const char *) ATTRIBUTE_NORETURN;
+static const char *shortpath (const char *, const char *);
+static void notice (const char *, ...) ATTRIBUTE_PRINTF_1;
+static char *savestring (const char *, unsigned int);
+static char *dupnstr (const char *, size_t);
+static int safe_read (int, void *, int);
+static void safe_write (int, void *, int, const char *);
+static void save_pointers (void);
+static void restore_pointers (void);
+static int is_id_char (int);
+static int in_system_include_dir (const char *);
+static int directory_specified_p (const char *);
+static int file_excluded_p (const char *);
+static char *unexpand_if_needed (const char *);
+static char *abspath (const char *, const char *);
+static void check_aux_info (int);
+static const char *find_corresponding_lparen (const char *);
+static int referenced_file_is_newer (const char *, time_t);
+static void save_def_or_dec (const char *, int);
+static void munge_compile_params (const char *);
+static int gen_aux_info_file (const char *);
+static void process_aux_info_file (const char *, int, int);
+static int identify_lineno (const char *);
+static void check_source (int, const char *);
+static const char *seek_to_line (int);
+static const char *forward_to_next_token_char (const char *);
+static void output_bytes (const char *, size_t);
+static void output_string (const char *);
+static void output_up_to (const char *);
+static int other_variable_style_function (const char *);
+static const char *find_rightmost_formals_list (const char *);
+static void do_cleaning (char *, const char *);
+static const char *careful_find_l_paren (const char *);
+static void do_processing (void);
+/* Look for these where the `const' qualifier is intentionally cast aside.  */
+#define NONCONST
+/* Define a default place to find the SYSCALLS.X file.  */
+#ifndef UNPROTOIZE
+#ifndef STANDARD_EXEC_PREFIX
+#define STANDARD_EXEC_PREFIX "/usr/local/lib/gcc-lib/"
+#endif /* !defined STANDARD_EXEC_PREFIX */
+static const char * const standard_exec_prefix = STANDARD_EXEC_PREFIX;
+static const char * const target_machine = DEFAULT_TARGET_MACHINE;
+static const char * const target_version = DEFAULT_TARGET_VERSION;
+#endif /* !defined (UNPROTOIZE) */
+/* Suffix of aux_info files.  */
+static const char * const aux_info_suffix = AUX_INFO_SUFFIX;
+/* String to attach to filenames for saved versions of original files.  */
+static const char * const save_suffix = SAVE_SUFFIX;
+#ifndef UNPROTOIZE
+/* String to attach to C filenames renamed to C++.  */
+static const char * const cplus_suffix = CPLUS_FILE_SUFFIX;
+/* File name of the file which contains descriptions of standard system
+routines.  Note that we never actually do anything with this file per se,
+but we do read in its corresponding aux_info file.  */
+static const char syscalls_filename[] = "SYSCALLS.c";
+/* Default place to find the above file.  */
+static const char * default_syscalls_dir;
+/* Variable to hold the complete absolutized filename of the SYSCALLS.c.X
+file.  */
+static char * syscalls_absolute_filename;
+#endif /* !defined (UNPROTOIZE) */
+/* Type of the structure that holds information about macro unexpansions.  */
+struct unexpansion_struct {
+const char *const expanded;
+const char *const contracted;
+};
+typedef struct unexpansion_struct unexpansion;
+/* A table of conversions that may need to be made for some (stupid) older
+operating systems where these types are preprocessor macros rather than
+typedefs (as they really ought to be).
+WARNING: The contracted forms must be as small (or smaller) as the
+expanded forms, or else havoc will ensue.  */
+static const unexpansion unexpansions[] = {
+{ "struct _iobuf", "FILE" },
+{ 0, 0 }
+};
+/* The number of "primary" slots in the hash tables for filenames and for
+function names.  This can be as big or as small as you like, except that
+it must be a power of two.  */
+#define HASH_TABLE_SIZE		(1 << 9)
+/* Bit mask to use when computing hash values.  */
+static const int hash_mask = (HASH_TABLE_SIZE - 1);
+/* Datatype for lists of directories or filenames.  */
+struct string_list
+{
+const char *name;
+struct string_list *next;
+};
+static struct string_list *string_list_cons (const char *,
+					     struct string_list *);
+/* List of directories in which files should be converted.  */
+struct string_list *directory_list;
+/* List of file names which should not be converted.
+A file is excluded if the end of its name, following a /,
+matches one of the names in this list.  */
+struct string_list *exclude_list;
+/* The name of the other style of variable-number-of-parameters functions
+(i.e. the style that we want to leave unconverted because we don't yet
+know how to convert them to this style.  This string is used in warning
+messages.  */
+/* Also define here the string that we can search for in the parameter lists
+taken from the .X files which will unambiguously indicate that we have
+found a varargs style function.  */
+#ifdef UNPROTOIZE
+static const char * const other_var_style = "stdarg";
+#else /* !defined (UNPROTOIZE) */
+static const char * const other_var_style = "varargs";
+static const char *varargs_style_indicator = "va_alist";
+#endif /* !defined (UNPROTOIZE) */
+/* The following two types are used to create hash tables.  In this program,
+there are two hash tables which are used to store and quickly lookup two
+different classes of strings.  The first type of strings stored in the
+first hash table are absolute filenames of files which protoize needs to
+know about.  The second type of strings (stored in the second hash table)
+are function names.  It is this second class of strings which really
+inspired the use of the hash tables, because there may be a lot of them.  */
+typedef struct hash_table_entry_struct hash_table_entry;
+/* Do some typedefs so that we don't have to write "struct" so often.  */
+typedef struct def_dec_info_struct def_dec_info;
+typedef struct file_info_struct file_info;
+typedef struct f_list_chain_item_struct f_list_chain_item;
+#ifndef UNPROTOIZE
+static int is_syscalls_file (const file_info *);
+static void rename_c_file (const hash_table_entry *);
+static const def_dec_info *find_extern_def (const def_dec_info *,
+					    const def_dec_info *);
+static const def_dec_info *find_static_definition (const def_dec_info *);
+static void connect_defs_and_decs (const hash_table_entry *);
+static void add_local_decl (const def_dec_info *, const char *);
+static void add_global_decls (const file_info *, const char *);
+#endif /* ! UNPROTOIZE */
+static int needs_to_be_converted (const file_info *);
+static void visit_each_hash_node (const hash_table_entry *,
+				  void (*)(const hash_table_entry *));
+static hash_table_entry *add_symbol (hash_table_entry *, const char *);
+static hash_table_entry *lookup (hash_table_entry *, const char *);
+static void free_def_dec (def_dec_info *);
+static file_info *find_file (const char *, int);
+static void reverse_def_dec_list (const hash_table_entry *);
+static void edit_fn_declaration (const def_dec_info *, const char *);
+static int edit_formals_lists (const char *, unsigned int,
+			       const def_dec_info *);
+static void edit_fn_definition (const def_dec_info *, const char *);
+static void scan_for_missed_items (const file_info *);
+static void edit_file (const hash_table_entry *);
+/* In the struct below, note that the "_info" field has two different uses
+depending on the type of hash table we are in (i.e. either the filenames
+hash table or the function names hash table).  In the filenames hash table
+the info fields of the entries point to the file_info struct which is
+associated with each filename (1 per filename).  In the function names
+hash table, the info field points to the head of a singly linked list of
+def_dec_info entries which are all defs or decs of the function whose
+name is pointed to by the "symbol" field.  Keeping all of the defs/decs
+for a given function name on a special list specifically for that function
+name makes it quick and easy to find out all of the important information
+about a given (named) function.  */
+struct hash_table_entry_struct {
+hash_table_entry *		hash_next;	/* -> to secondary entries */
+const char *			symbol;		/* -> to the hashed string */
+union {
+const def_dec_info *	_ddip;
+file_info *			_fip;
+} _info;
+};
+#define ddip _info._ddip
+#define fip _info._fip
+/* Define a type specifically for our two hash tables.  */
+typedef hash_table_entry hash_table[HASH_TABLE_SIZE];
+/* The following struct holds all of the important information about any
+single filename (e.g. file) which we need to know about.  */
+struct file_info_struct {
+const hash_table_entry *	hash_entry; /* -> to associated hash entry */
+const def_dec_info *		defs_decs;  /* -> to chain of defs/decs */
+time_t			mtime;      /* Time of last modification.  */
+};
+/* Due to the possibility that functions may return pointers to functions,
+(which may themselves have their own parameter lists) and due to the
+fact that returned pointers-to-functions may be of type "pointer-to-
+function-returning-pointer-to-function" (ad nauseum) we have to keep
+an entire chain of ANSI style formal parameter lists for each function.
+Normally, for any given function, there will only be one formals list
+on the chain, but you never know.
+Note that the head of each chain of formals lists is pointed to by the
+`f_list_chain' field of the corresponding def_dec_info record.
+For any given chain, the item at the head of the chain is the *leftmost*
+parameter list seen in the actual C language function declaration.  If
+there are other members of the chain, then these are linked in left-to-right
+order from the head of the chain.  */
+struct f_list_chain_item_struct {
+const f_list_chain_item *	chain_next;	/* -> to next item on chain */
+const char *			formals_list;	/* -> to formals list string */
+};
+/* The following struct holds all of the important information about any
+single function definition or declaration which we need to know about.
+Note that for unprotoize we don't need to know very much because we
+never even create records for stuff that we don't intend to convert
+(like for instance defs and decs which are already in old K&R format
+and "implicit" function declarations).  */
+struct def_dec_info_struct {
+const def_dec_info *	next_in_file;	/* -> to rest of chain for file */
+file_info *        	file;		/* -> file_info for containing file */
+int        		line;		/* source line number of def/dec */
+const char *		ansi_decl;	/* -> left end of ansi decl */
+hash_table_entry *	hash_entry;	/* -> hash entry for function name */
+unsigned int        	is_func_def;	/* = 0 means this is a declaration */
+const def_dec_info *	next_for_func;	/* -> to rest of chain for func name */
+unsigned int		f_list_count;	/* count of formals lists we expect */
+char			prototyped;	/* = 0 means already prototyped */
+#ifndef UNPROTOIZE
+const f_list_chain_item * f_list_chain;	/* -> chain of formals lists */
+const def_dec_info *	definition;	/* -> def/dec containing related def */
+char	        	is_static;	/* = 0 means visibility is "extern"  */
+char			is_implicit;	/* != 0 for implicit func decl's */
+char			written;	/* != 0 means written for implicit */
+#else /* !defined (UNPROTOIZE) */
+const char *		formal_names;	/* -> to list of names of formals */
+const char *		formal_decls;	/* -> to string of formal declarations */
+#endif /* !defined (UNPROTOIZE) */
+};
+/* Pointer to the tail component of the filename by which this program was
+invoked.  Used everywhere in error and warning messages.  */
+static const char *pname;
+/* Error counter.  Will be nonzero if we should give up at the next convenient
+stopping point.  */
+static int errors = 0;
+/* Option flags.  */
+/* ??? The variables are not marked static because some of them have
+the same names as gcc variables declared in options.h.  */
+/* ??? These comments should say what the flag mean as well as the options
+that set them.  */
+/* File name to use for running gcc.  Allows GCC 2 to be named
+something other than gcc.  */
+static const char *compiler_file_name = "gcc";
+int version_flag = 0;		/* Print our version number.  */
+int quiet_flag = 0;		/* Don't print messages normally.  */
+int nochange_flag = 0;		/* Don't convert, just say what files
+				   we would have converted.  */
+int nosave_flag = 0;		/* Don't save the old version.  */
+int keep_flag = 0;		/* Don't delete the .X files.  */
+static const char ** compile_params = 0;	/* Option string for gcc.  */
+#ifdef UNPROTOIZE
+static const char *indent_string = "     ";	/* Indentation for newly
+						   inserted parm decls.  */
+#else /* !defined (UNPROTOIZE) */
+int local_flag = 0;		/* Insert new local decls (when?).  */
+int global_flag = 0;		/* set by -g option */
+int cplusplus_flag = 0;		/* Rename converted files to *.C.  */
+static const char *nondefault_syscalls_dir = 0; /* Dir to look for
+						   SYSCALLS.c.X in.  */
+#endif /* !defined (UNPROTOIZE) */
+/* An index into the compile_params array where we should insert the source
+file name when we are ready to exec the C compiler.  A zero value indicates
+that we have not yet called munge_compile_params.  */
+static int input_file_name_index = 0;
+/* An index into the compile_params array where we should insert the filename
+for the aux info file, when we run the C compiler.  */
+static int aux_info_file_name_index = 0;
+/* Count of command line arguments which were "filename" arguments.  */
+static int n_base_source_files = 0;
+/* Points to a malloc'ed list of pointers to all of the filenames of base
+source files which were specified on the command line.  */
+static const char **base_source_filenames;
+/* Line number of the line within the current aux_info file that we
+are currently processing.  Used for error messages in case the prototypes
+info file is corrupted somehow.  */
+static int current_aux_info_lineno;
+/* Pointer to the name of the source file currently being converted.  */
+static const char *convert_filename;
+/* Pointer to relative root string (taken from aux_info file) which indicates
+where directory the user was in when he did the compilation step that
+produced the containing aux_info file.  */
+static const char *invocation_filename;
+/* Pointer to the base of the input buffer that holds the original text for the
+source file currently being converted.  */
+static const char *orig_text_base;
+/* Pointer to the byte just beyond the end of the input buffer that holds the
+original text for the source file currently being converted.  */
+static const char *orig_text_limit;
+/* Pointer to the base of the input buffer that holds the cleaned text for the
+source file currently being converted.  */
+static const char *clean_text_base;
+/* Pointer to the byte just beyond the end of the input buffer that holds the
+cleaned text for the source file currently being converted.  */
+static const char *clean_text_limit;
+/* Pointer to the last byte in the cleaned text buffer that we have already
+(virtually) copied to the output buffer (or decided to ignore).  */
+static const char * clean_read_ptr;
+/* Pointer to the base of the output buffer that holds the replacement text
+for the source file currently being converted.  */
+static char *repl_text_base;
+/* Pointer to the byte just beyond the end of the output buffer that holds the
+replacement text for the source file currently being converted.  */
+static char *repl_text_limit;
+/* Pointer to the last byte which has been stored into the output buffer.
+The next byte to be stored should be stored just past where this points
+to.  */
+static char * repl_write_ptr;
+/* Pointer into the cleaned text buffer for the source file we are currently
+converting.  This points to the first character of the line that we last
+did a "seek_to_line" to (see below).  */
+static const char *last_known_line_start;
+/* Number of the line (in the cleaned text buffer) that we last did a
+"seek_to_line" to.  Will be one if we just read a new source file
+into the cleaned text buffer.  */
+static int last_known_line_number;
+/* The filenames hash table.  */
+static hash_table filename_primary;
+/* The function names hash table.  */
+static hash_table function_name_primary;
+/* The place to keep the recovery address which is used only in cases where
+we get hopelessly confused by something in the cleaned original text.  */
+static jmp_buf source_confusion_recovery;
+/* A pointer to the current directory filename (used by abspath).  */
+static char *cwd_buffer;
+/* A place to save the read pointer until we are sure that an individual
+attempt at editing will succeed.  */
+static const char * saved_clean_read_ptr;
+/* A place to save the write pointer until we are sure that an individual
+attempt at editing will succeed.  */
+static char * saved_repl_write_ptr;
+/* Translate and output an error message.  */
+static void
+notice (const char *cmsgid, ...)
+{
+va_list ap;
+va_start (ap, cmsgid);
+vfprintf (stderr, _(cmsgid), ap);
+va_end (ap);
+}
+/* Make a copy of a string INPUT with size SIZE.  */
+static char *
+savestring (const char *input, unsigned int size)
+{
+char *output = xmalloc (size + 1);
+strcpy (output, input);
+return output;
+}
+/* Make a duplicate of the first N bytes of a given string in a newly
+allocated area.  */
+static char *
+dupnstr (const char *s, size_t n)
+{
+char *ret_val = xmalloc (n + 1);
+strncpy (ret_val, s, n);
+ret_val[n] = '\0';
+return ret_val;
+}
+/* Read LEN bytes at PTR from descriptor DESC, for file FILENAME,
+retrying if necessary.  Return the actual number of bytes read.  */
+static int
+safe_read (int desc, void *ptr, int len)
+{
+int left = len;
+while (left > 0) {
+int nchars = read (desc, ptr, left);
+if (nchars < 0)
+{
+#ifdef EINTR
+	if (errno == EINTR)
+	  continue;
+#endif
+	return nchars;
+}
+if (nchars == 0)
+break;
+/* Arithmetic on void pointers is a gcc extension.  */
+ptr = (char *) ptr + nchars;
+left -= nchars;
+}
+return len - left;
+}
+/* Write LEN bytes at PTR to descriptor DESC,
+retrying if necessary, and treating any real error as fatal.  */
+static void
+safe_write (int desc, void *ptr, int len, const char *out_fname)
+{
+while (len > 0) {
+int written = write (desc, ptr, len);
+if (written < 0)
+{
+	int errno_val = errno;
+#ifdef EINTR
+	if (errno_val == EINTR)
+	  continue;
+#endif
+	notice ("%s: error writing file '%s': %s\n",
+		pname, shortpath (NULL, out_fname), xstrerror (errno_val));
+	return;
+}
+/* Arithmetic on void pointers is a gcc extension.  */
+ptr = (char *) ptr + written;
+len -= written;
+}
+}
+/* Get setup to recover in case the edit we are about to do goes awry.  */
+static void
+save_pointers (void)
+{
+saved_clean_read_ptr = clean_read_ptr;
+saved_repl_write_ptr = repl_write_ptr;
+}
+/* Call this routine to recover our previous state whenever something looks
+too confusing in the source code we are trying to edit.  */
+static void
+restore_pointers (void)
+{
+clean_read_ptr = saved_clean_read_ptr;
+repl_write_ptr = saved_repl_write_ptr;
+}
+/* Return true if the given character is a valid identifier character.  */
+static int
+is_id_char (int ch)
+{
+return (ISIDNUM (ch) || (ch == '$'));
+}
+/* Give a message indicating the proper way to invoke this program and then
+exit with nonzero status.  */
+static void
+usage (void)
+{
+#ifdef UNPROTOIZE
+notice ("%s: usage '%s [ -VqfnkN ] [ -i <istring> ] [ filename ... ]'\n",
+	  pname, pname);
+#else /* !defined (UNPROTOIZE) */
+notice ("%s: usage '%s [ -VqfnkNlgC ] [ -B <dirname> ] [ filename ... ]'\n",
+	  pname, pname);
+#endif /* !defined (UNPROTOIZE) */
+exit (FATAL_EXIT_CODE);
+}
+/* Return true if the given filename (assumed to be an absolute filename)
+designates a file residing anywhere beneath any one of the "system"
+include directories.  */
+static int
+in_system_include_dir (const char *path)
+{
+const struct default_include *p;
+gcc_assert (IS_ABSOLUTE_PATH (path));
+for (p = cpp_include_defaults; p->fname; p++)
+if (!strncmp (path, p->fname, strlen (p->fname))
+	&& IS_DIR_SEPARATOR (path[strlen (p->fname)]))
+return 1;
+return 0;
+}
+#if 0
+/* Return true if the given filename designates a file that the user has
+read access to and for which the user has write access to the containing
+directory.  */
+static int
+file_could_be_converted (const char *path)
+{
+char *const dir_name = alloca (strlen (path) + 1);
+if (access (path, R_OK))
+return 0;
+{
+char *dir_last_slash;
+strcpy (dir_name, path);
+dir_last_slash = strrchr (dir_name, DIR_SEPARATOR);
+#ifdef DIR_SEPARATOR_2
+{
+char *slash;
+slash = strrchr (dir_last_slash ? dir_last_slash : dir_name,
+		       DIR_SEPARATOR_2);
+if (slash)
+	dir_last_slash = slash;
+}
+#endif
+gcc_assert (dir_last_slash);
+*dir_last_slash = '\0';
+}
+if (access (path, W_OK))
+return 0;
+return 1;
+}
+/* Return true if the given filename designates a file that we are allowed
+to modify.  Files which we should not attempt to modify are (a) "system"
+include files, and (b) files which the user doesn't have write access to,
+and (c) files which reside in directories which the user doesn't have
+write access to.  Unless requested to be quiet, give warnings about
+files that we will not try to convert for one reason or another.  An
+exception is made for "system" include files, which we never try to
+convert and for which we don't issue the usual warnings.  */
+static int
+file_normally_convertible (const char *path)
+{
+char *const dir_name = alloca (strlen (path) + 1);
+if (in_system_include_dir (path))
+return 0;
+{
+char *dir_last_slash;
+strcpy (dir_name, path);
+dir_last_slash = strrchr (dir_name, DIR_SEPARATOR);
+#ifdef DIR_SEPARATOR_2
+{
+char *slash;
+slash = strrchr (dir_last_slash ? dir_last_slash : dir_name,
+		       DIR_SEPARATOR_2);
+if (slash)
+	dir_last_slash = slash;
+}
+#endif
+gcc_assert (dir_last_slash);
+*dir_last_slash = '\0';
+}
+if (access (path, R_OK))
+{
+if (!quiet_flag)
+	notice ("%s: warning: no read access for file '%s'\n",
+		pname, shortpath (NULL, path));
+return 0;
+}
+if (access (path, W_OK))
+{
+if (!quiet_flag)
+	notice ("%s: warning: no write access for file '%s'\n",
+		pname, shortpath (NULL, path));
+return 0;
+}
+if (access (dir_name, W_OK))
+{
+if (!quiet_flag)
+	notice ("%s: warning: no write access for dir containing '%s'\n",
+		pname, shortpath (NULL, path));
+return 0;
+}
+return 1;
+}
+#endif /* 0 */
+#ifndef UNPROTOIZE
+/* Return true if the given file_info struct refers to the special SYSCALLS.c.X
+file.  Return false otherwise.  */
+static int
+is_syscalls_file (const file_info *fi_p)
+{
+char const *f = fi_p->hash_entry->symbol;
+size_t fl = strlen (f), sysl = sizeof (syscalls_filename) - 1;
+return sysl <= fl  &&  strcmp (f + fl - sysl, syscalls_filename) == 0;
+}
+#endif /* !defined (UNPROTOIZE) */
+/* Check to see if this file will need to have anything done to it on this
+run.  If there is nothing in the given file which both needs conversion
+and for which we have the necessary stuff to do the conversion, return
+false.  Otherwise, return true.
+Note that (for protoize) it is only valid to call this function *after*
+the connections between declarations and definitions have all been made
+by connect_defs_and_decs.  */
+static int
+needs_to_be_converted (const file_info *file_p)
+{
+const def_dec_info *ddp;
+#ifndef UNPROTOIZE
+if (is_syscalls_file (file_p))
+return 0;
+#endif /* !defined (UNPROTOIZE) */
+for (ddp = file_p->defs_decs; ddp; ddp = ddp->next_in_file)
+if (
+#ifndef UNPROTOIZE
+/* ... and if we a protoizing and this function is in old style ...  */
+!ddp->prototyped
+/* ... and if this a definition or is a decl with an associated def ...  */
+&& (ddp->is_func_def || (!ddp->is_func_def && ddp->definition))
+#else /* defined (UNPROTOIZE) */
+/* ... and if we are unprotoizing and this function is in new style ...  */
+ddp->prototyped
+#endif /* defined (UNPROTOIZE) */
+)
+	  /* ... then the containing file needs converting.  */
+	  return -1;
+return 0;
+}
+/* Return 1 if the file name NAME is in a directory
+that should be converted.  */
+static int
+directory_specified_p (const char *name)
+{
+struct string_list *p;
+for (p = directory_list; p; p = p->next)
+if (!strncmp (name, p->name, strlen (p->name))
+	&& IS_DIR_SEPARATOR (name[strlen (p->name)]))
+{
+	const char *q = name + strlen (p->name) + 1;
+	/* If there are more slashes, it's in a subdir, so
+	   this match doesn't count.  */
+	while (*q++)
+	  if (IS_DIR_SEPARATOR (*(q-1)))
+	    goto lose;
+	return 1;
+lose: ;
+}
+return 0;
+}
+/* Return 1 if the file named NAME should be excluded from conversion.  */
+static int
+file_excluded_p (const char *name)
+{
+struct string_list *p;
+int len = strlen (name);
+for (p = exclude_list; p; p = p->next)
+if (!strcmp (name + len - strlen (p->name), p->name)
+	&& IS_DIR_SEPARATOR (name[len - strlen (p->name) - 1]))
+return 1;
+return 0;
+}
+/* Construct a new element of a string_list.
+STRING is the new element value, and REST holds the remaining elements.  */
+static struct string_list *
+string_list_cons (const char *string, struct string_list *rest)
+{
+struct string_list *temp = xmalloc (sizeof (struct string_list));
+temp->next = rest;
+temp->name = string;
+return temp;
+}
+/* ??? The GNU convention for mentioning function args in its comments
+is to capitalize them.  So change "hash_tab_p" to HASH_TAB_P below.
+Likewise for all the other functions.  */
+/* Given a hash table, apply some function to each node in the table. The
+table to traverse is given as the "hash_tab_p" argument, and the
+function to be applied to each node in the table is given as "func"
+argument.  */
+static void
+visit_each_hash_node (const hash_table_entry *hash_tab_p,
+		      void (*func) (const hash_table_entry *))
+{
+const hash_table_entry *primary;
+for (primary = hash_tab_p; primary < &hash_tab_p[HASH_TABLE_SIZE]; primary++)
+if (primary->symbol)
+{
+	hash_table_entry *second;
+	(*func)(primary);
+	for (second = primary->hash_next; second; second = second->hash_next)
+	  (*func) (second);
+}
+}
+/* Initialize all of the fields of a new hash table entry, pointed
+to by the "p" parameter.  Note that the space to hold the entry
+is assumed to have already been allocated before this routine is
+called.  */
+static hash_table_entry *
+add_symbol (hash_table_entry *p, const char *s)
+{
+p->hash_next = NULL;
+p->symbol = xstrdup (s);
+p->ddip = NULL;
+p->fip = NULL;
+return p;
+}
+/* Look for a particular function name or filename in the particular
+hash table indicated by "hash_tab_p".  If the name is not in the
+given hash table, add it.  Either way, return a pointer to the
+hash table entry for the given name.  */
+static hash_table_entry *
+lookup (hash_table_entry *hash_tab_p, const char *search_symbol)
+{
+int hash_value = 0;
+const char *search_symbol_char_p = search_symbol;
+hash_table_entry *p;
+while (*search_symbol_char_p)
+hash_value += *search_symbol_char_p++;
+hash_value &= hash_mask;
+p = &hash_tab_p[hash_value];
+if (! p->symbol)
+return add_symbol (p, search_symbol);
+if (!strcmp (p->symbol, search_symbol))
+return p;
+while (p->hash_next)
+{
+p = p->hash_next;
+if (!strcmp (p->symbol, search_symbol))
+	return p;
+}
+p->hash_next = xmalloc (sizeof (hash_table_entry));
+p = p->hash_next;
+return add_symbol (p, search_symbol);
+}
+/* Throw a def/dec record on the junk heap.
+Also, since we are not using this record anymore, free up all of the
+stuff it pointed to.  */
+static void
+free_def_dec (def_dec_info *p)
+{
+free ((NONCONST void *) p->ansi_decl);
+#ifndef UNPROTOIZE
+{
+const f_list_chain_item * curr;
+const f_list_chain_item * next;
+for (curr = p->f_list_chain; curr; curr = next)
+{
+	next = curr->chain_next;
+	free ((NONCONST void *) curr);
+}
+}
+#endif /* !defined (UNPROTOIZE) */
+free (p);
+}
+/* Unexpand as many macro symbols as we can find.
+If the given line must be unexpanded, make a copy of it in the heap and
+return a pointer to the unexpanded copy.  Otherwise return NULL.  */
+static char *
+unexpand_if_needed (const char *aux_info_line)
+{
+static char *line_buf = 0;
+static int line_buf_size = 0;
+const unexpansion *unexp_p;
+int got_unexpanded = 0;
+const char *s;
+char *copy_p = line_buf;
+if (line_buf == 0)
+{
+line_buf_size = 1024;
+line_buf = xmalloc (line_buf_size);
+}
+copy_p = line_buf;
+/* Make a copy of the input string in line_buf, expanding as necessary.  */
+for (s = aux_info_line; *s != '\n'; )
+{
+for (unexp_p = unexpansions; unexp_p->expanded; unexp_p++)
+	{
+	  const char *in_p = unexp_p->expanded;
+	  size_t len = strlen (in_p);
+	  if (*s == *in_p && !strncmp (s, in_p, len) && !is_id_char (s[len]))
+	    {
+	      int size = strlen (unexp_p->contracted);
+	      got_unexpanded = 1;
+	      if (copy_p + size - line_buf >= line_buf_size)
+		{
+		  int offset = copy_p - line_buf;
+		  line_buf_size *= 2;
+		  line_buf_size += size;
+		  line_buf = xrealloc (line_buf, line_buf_size);
+		  copy_p = line_buf + offset;
+		}
+	      strcpy (copy_p, unexp_p->contracted);
+	      copy_p += size;
+	      /* Assume that there will not be another replacement required
+	         within the text just replaced.  */
+	      s += len;
+	      goto continue_outer;
+	    }
+	}
+if (copy_p - line_buf == line_buf_size)
+	{
+	  int offset = copy_p - line_buf;
+	  line_buf_size *= 2;
+	  line_buf = xrealloc (line_buf, line_buf_size);
+	  copy_p = line_buf + offset;
+	}
+*copy_p++ = *s++;
+continue_outer: ;
+}
+if (copy_p + 2 - line_buf >= line_buf_size)
+{
+int offset = copy_p - line_buf;
+line_buf_size *= 2;
+line_buf = xrealloc (line_buf, line_buf_size);
+copy_p = line_buf + offset;
+}
+*copy_p++ = '\n';
+*copy_p = '\0';
+return (got_unexpanded ? savestring (line_buf, copy_p - line_buf) : 0);
+}
+/* Return the absolutized filename for the given relative
+filename.  Note that if that filename is already absolute, it may
+still be returned in a modified form because this routine also
+eliminates redundant slashes and single dots and eliminates double
+dots to get a shortest possible filename from the given input
+filename.  The absolutization of relative filenames is made by
+assuming that the given filename is to be taken as relative to
+the first argument (cwd) or to the current directory if cwd is
+NULL.  */
+static char *
+abspath (const char *cwd, const char *rel_filename)
+{
+/* Setup the current working directory as needed.  */
+const char *const cwd2 = (cwd) ? cwd : cwd_buffer;
+char *const abs_buffer = alloca (strlen (cwd2) + strlen (rel_filename) + 2);
+char *endp = abs_buffer;
+char *outp, *inp;
+/* Copy the  filename (possibly preceded by the current working
+directory name) into the absolutization buffer.  */
+{
+const char *src_p;
+if (! IS_ABSOLUTE_PATH (rel_filename))
+{
+	src_p = cwd2;
+	while ((*endp++ = *src_p++))
+	  continue;
+	*(endp-1) = DIR_SEPARATOR;     		/* overwrite null */
+}
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+else if (IS_DIR_SEPARATOR (rel_filename[0]))
+{
+	/* A path starting with a directory separator is considered absolute
+	   for dos based filesystems, but it's really not -- it's just the
+	   convention used throughout GCC and it works. However, in this
+	   case, we still need to prepend the drive spec from cwd_buffer.  */
+	*endp++ = cwd2[0];
+	*endp++ = cwd2[1];
+}
+#endif
+src_p = rel_filename;
+while ((*endp++ = *src_p++))
+continue;
+}
+/* Now make a copy of abs_buffer into abs_buffer, shortening the
+filename (by taking out slashes and dots) as we go.  */
+outp = inp = abs_buffer;
+*outp++ = *inp++;        	/* copy first slash */
+#if defined (apollo) || defined (_WIN32) || defined (__INTERIX)
+if (IS_DIR_SEPARATOR (inp[0]))
+*outp++ = *inp++;        	/* copy second slash */
+#endif
+for (;;)
+{
+if (!inp[0])
+	break;
+else if (IS_DIR_SEPARATOR (inp[0]) && IS_DIR_SEPARATOR (outp[-1]))
+	{
+	  inp++;
+	  continue;
+	}
+else if (inp[0] == '.' && IS_DIR_SEPARATOR (outp[-1]))
+	{
+	  if (!inp[1])
+	    break;
+	  else if (IS_DIR_SEPARATOR (inp[1]))
+	    {
+	      inp += 2;
+	      continue;
+	    }
+	  else if ((inp[1] == '.') && (inp[2] == 0
+	                               || IS_DIR_SEPARATOR (inp[2])))
+	    {
+	      inp += (IS_DIR_SEPARATOR (inp[2])) ? 3 : 2;
+	      outp -= 2;
+	      while (outp >= abs_buffer && ! IS_DIR_SEPARATOR (*outp))
+	      	outp--;
+	      if (outp < abs_buffer)
+		{
+		  /* Catch cases like /.. where we try to backup to a
+		     point above the absolute root of the logical file
+		     system.  */
+		  notice ("%s: invalid file name: %s\n",
+			  pname, rel_filename);
+		  exit (FATAL_EXIT_CODE);
+		}
+	      *++outp = '\0';
+	      continue;
+	    }
+	}
+*outp++ = *inp++;
+}
+/* On exit, make sure that there is a trailing null, and make sure that
+the last character of the returned string is *not* a slash.  */
+*outp = '\0';
+if (IS_DIR_SEPARATOR (outp[-1]))
+*--outp  = '\0';
+/* Make a copy (in the heap) of the stuff left in the absolutization
+buffer and return a pointer to the copy.  */
+return savestring (abs_buffer, outp - abs_buffer);
+}
+/* Given a filename (and possibly a directory name from which the filename
+is relative) return a string which is the shortest possible
+equivalent for the corresponding full (absolutized) filename.  The
+shortest possible equivalent may be constructed by converting the
+absolutized filename to be a relative filename (i.e. relative to
+the actual current working directory).  However if a relative filename
+is longer, then the full absolute filename is returned.
+KNOWN BUG:
+Note that "simple-minded" conversion of any given type of filename (either
+relative or absolute) may not result in a valid equivalent filename if any
+subpart of the original filename is actually a symbolic link.  */
+static const char *
+shortpath (const char *cwd, const char *filename)
+{
+char *rel_buffer;
+char *rel_buf_p;
+char *cwd_p = cwd_buffer;
+char *path_p;
+int unmatched_slash_count = 0;
+size_t filename_len = strlen (filename);
+path_p = abspath (cwd, filename);
+rel_buf_p = rel_buffer = xmalloc (filename_len);
+while (*cwd_p && IS_SAME_PATH_CHAR (*cwd_p, *path_p))
+{
+cwd_p++;
+path_p++;
+}
+if (!*cwd_p && (!*path_p || IS_DIR_SEPARATOR (*path_p)))
+{
+/* whole pwd matched */
+if (!*path_p)        	/* input *is* the current path! */
+	return ".";
+else
+	return ++path_p;
+}
+else
+{
+if (*path_p)
+	{
+	  --cwd_p;
+	  --path_p;
+	  while (! IS_DIR_SEPARATOR (*cwd_p))     /* backup to last slash */
+	    {
+	      --cwd_p;
+	      --path_p;
+	    }
+	  cwd_p++;
+	  path_p++;
+	  unmatched_slash_count++;
+	}
+/* Find out how many directory levels in cwd were *not* matched.  */
+while (*cwd_p++)
+	if (IS_DIR_SEPARATOR (*(cwd_p-1)))
+	  unmatched_slash_count++;
+/* Now we know how long the "short name" will be.
+	 Reject it if longer than the input.  */
+if (unmatched_slash_count * 3 + strlen (path_p) >= filename_len)
+	return filename;
+/* For each of them, put a `../' at the beginning of the short name.  */
+while (unmatched_slash_count--)
+	{
+	  /* Give up if the result gets to be longer
+	     than the absolute path name.  */
+	  if (rel_buffer + filename_len <= rel_buf_p + 3)
+	    return filename;
+	  *rel_buf_p++ = '.';
+	  *rel_buf_p++ = '.';
+	  *rel_buf_p++ = DIR_SEPARATOR;
+	}
+/* Then tack on the unmatched part of the desired file's name.  */
+do
+	{
+	  if (rel_buffer + filename_len <= rel_buf_p)
+	    return filename;
+	}
+while ((*rel_buf_p++ = *path_p++));
+--rel_buf_p;
+if (IS_DIR_SEPARATOR (*(rel_buf_p-1)))
+	*--rel_buf_p = '\0';
+return rel_buffer;
+}
+}
+/* Lookup the given filename in the hash table for filenames.  If it is a
+new one, then the hash table info pointer will be null.  In this case,
+we create a new file_info record to go with the filename, and we initialize
+that record with some reasonable values.  */
+/* FILENAME was const, but that causes a warning on AIX when calling stat.
+That is probably a bug in AIX, but might as well avoid the warning.  */
+static file_info *
+find_file (const char *filename, int do_not_stat)
+{
+hash_table_entry *hash_entry_p;
+hash_entry_p = lookup (filename_primary, filename);
+if (hash_entry_p->fip)
+return hash_entry_p->fip;
+else
+{
+struct stat stat_buf;
+file_info *file_p = xmalloc (sizeof (file_info));
+/* If we cannot get status on any given source file, give a warning
+	 and then just set its time of last modification to infinity.  */
+if (do_not_stat)
+	stat_buf.st_mtime = (time_t) 0;
+else
+	{
+	  if (stat (filename, &stat_buf) == -1)
+	    {
+	      int errno_val = errno;
+	      notice ("%s: %s: can't get status: %s\n",
+		      pname, shortpath (NULL, filename),
+		      xstrerror (errno_val));
+	      stat_buf.st_mtime = (time_t) -1;
+	    }
+	}
+hash_entry_p->fip = file_p;
+file_p->hash_entry = hash_entry_p;
+file_p->defs_decs = NULL;
+file_p->mtime = stat_buf.st_mtime;
+return file_p;
+}
+}
+/* Generate a fatal error because some part of the aux_info file is
+messed up.  */
+static void
+aux_info_corrupted (void)
+{
+notice ("\n%s: fatal error: aux info file corrupted at line %d\n",
+	  pname, current_aux_info_lineno);
+exit (FATAL_EXIT_CODE);
+}
+/* ??? This comment is vague.  Say what the condition is for.  */
+/* Check to see that a condition is true.  This is kind of like an assert.  */
+static void
+check_aux_info (int cond)
+{
+if (! cond)
+aux_info_corrupted ();
+}
+/* Given a pointer to the closing right parenthesis for a particular formals
+list (in an aux_info file) find the corresponding left parenthesis and
+return a pointer to it.  */
+static const char *
+find_corresponding_lparen (const char *p)
+{
+const char *q;
+int paren_depth;
+for (paren_depth = 1, q = p-1; paren_depth; q--)
+{
+switch (*q)
+	{
+	case ')':
+	  paren_depth++;
+	  break;
+	case '(':
+	  paren_depth--;
+	  break;
+	}
+}
+return ++q;
+}
+/* Given a line from  an aux info file, and a time at which the aux info
+file it came from was created, check to see if the item described in
+the line comes from a file which has been modified since the aux info
+file was created.  If so, return nonzero, else return zero.  */
+static int
+referenced_file_is_newer (const char *l, time_t aux_info_mtime)
+{
+const char *p;
+file_info *fi_p;
+char *filename;
+check_aux_info (l[0] == '/');
+check_aux_info (l[1] == '*');
+check_aux_info (l[2] == ' ');
+{
+const char *filename_start = p = l + 3;
+while (*p != ':'
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+	   || (*p == ':' && *p && *(p+1) && IS_DIR_SEPARATOR (*(p+1)))
+#endif
+	   )
+p++;
+filename = alloca ((size_t) (p - filename_start) + 1);
+strncpy (filename, filename_start, (size_t) (p - filename_start));
+filename[p-filename_start] = '\0';
+}
+/* Call find_file to find the file_info record associated with the file
+which contained this particular def or dec item.  Note that this call
+may cause a new file_info record to be created if this is the first time
+that we have ever known about this particular file.  */
+fi_p = find_file (abspath (invocation_filename, filename), 0);
+return (fi_p->mtime > aux_info_mtime);
+}
+/* Given a line of info from the aux_info file, create a new
+def_dec_info record to remember all of the important information about
+a function definition or declaration.
+Link this record onto the list of such records for the particular file in
+which it occurred in proper (descending) line number order (for now).
+If there is an identical record already on the list for the file, throw
+this one away.  Doing so takes care of the (useless and troublesome)
+duplicates which are bound to crop up due to multiple inclusions of any
+given individual header file.
+Finally, link the new def_dec record onto the list of such records
+pertaining to this particular function name.  */
+static void
+save_def_or_dec (const char *l, int is_syscalls)
+{
+const char *p;
+const char *semicolon_p;
+def_dec_info *def_dec_p = xmalloc (sizeof (def_dec_info));
+#ifndef UNPROTOIZE
+def_dec_p->written = 0;
+#endif /* !defined (UNPROTOIZE) */
+/* Start processing the line by picking off 5 pieces of information from
+the left hand end of the line.  These are filename, line number,
+new/old/implicit flag (new = ANSI prototype format), definition or
+declaration flag, and extern/static flag).  */
+check_aux_info (l[0] == '/');
+check_aux_info (l[1] == '*');
+check_aux_info (l[2] == ' ');
+{
+const char *filename_start = p = l + 3;
+char *filename;
+while (*p != ':'
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+	   || (*p == ':' && *p && *(p+1) && IS_DIR_SEPARATOR (*(p+1)))
+#endif
+	   )
+p++;
+filename = alloca ((size_t) (p - filename_start) + 1);
+strncpy (filename, filename_start, (size_t) (p - filename_start));
+filename[p-filename_start] = '\0';
+/* Call find_file to find the file_info record associated with the file
+which contained this particular def or dec item.  Note that this call
+may cause a new file_info record to be created if this is the first time
+that we have ever known about this particular file.
+Note that we started out by forcing all of the base source file names
+(i.e. the names of the aux_info files with the .X stripped off) into the
+filenames hash table, and we simultaneously setup file_info records for
+all of these base file names (even if they may be useless later).
+The file_info records for all of these "base" file names (properly)
+act as file_info records for the "original" (i.e. un-included) files
+which were submitted to gcc for compilation (when the -aux-info
+option was used).  */
+def_dec_p->file = find_file (abspath (invocation_filename, filename), is_syscalls);
+}
+{
+const char *line_number_start = ++p;
+char line_number[10];
+while (*p != ':'
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+	   || (*p == ':' && *p && *(p+1) && IS_DIR_SEPARATOR (*(p+1)))
+#endif
+	   )
+p++;
+strncpy (line_number, line_number_start, (size_t) (p - line_number_start));
+line_number[p-line_number_start] = '\0';
+def_dec_p->line = atoi (line_number);
+}
+/* Check that this record describes a new-style, old-style, or implicit
+definition or declaration.  */
+p++;	/* Skip over the `:'.  */
+check_aux_info ((*p == 'N') || (*p == 'O') || (*p == 'I'));
+/* Is this a new style (ANSI prototyped) definition or declaration? */
+def_dec_p->prototyped = (*p == 'N');
+#ifndef UNPROTOIZE
+/* Is this an implicit declaration? */
+def_dec_p->is_implicit = (*p == 'I');
+#endif /* !defined (UNPROTOIZE) */
+p++;
+check_aux_info ((*p == 'C') || (*p == 'F'));
+/* Is this item a function definition (F) or a declaration (C).  Note that
+we treat item taken from the syscalls file as though they were function
+definitions regardless of what the stuff in the file says.  */
+def_dec_p->is_func_def = ((*p++ == 'F') || is_syscalls);
+#ifndef UNPROTOIZE
+def_dec_p->definition = 0;	/* Fill this in later if protoizing.  */
+#endif /* !defined (UNPROTOIZE) */
+check_aux_info (*p++ == ' ');
+check_aux_info (*p++ == '*');
+check_aux_info (*p++ == '/');
+check_aux_info (*p++ == ' ');
+#ifdef UNPROTOIZE
+check_aux_info ((!strncmp (p, "static", 6)) || (!strncmp (p, "extern", 6)));
+#else /* !defined (UNPROTOIZE) */
+if (!strncmp (p, "static", 6))
+def_dec_p->is_static = -1;
+else if (!strncmp (p, "extern", 6))
+def_dec_p->is_static = 0;
+else
+check_aux_info (0);	/* Didn't find either `extern' or `static'.  */
+#endif /* !defined (UNPROTOIZE) */
+{
+const char *ansi_start = p;
+p += 6;	/* Pass over the "static" or "extern".  */
+/* We are now past the initial stuff.  Search forward from here to find
+the terminating semicolon that should immediately follow the entire
+ANSI format function declaration.  */
+while (*++p != ';')
+continue;
+semicolon_p = p;
+/* Make a copy of the ansi declaration part of the line from the aux_info
+file.  */
+def_dec_p->ansi_decl
+= dupnstr (ansi_start, (size_t) ((semicolon_p+1) - ansi_start));
+/* Backup and point at the final right paren of the final argument list.  */
+p--;
+#ifndef UNPROTOIZE
+def_dec_p->f_list_chain = NULL;
+#endif /* !defined (UNPROTOIZE) */
+while (p != ansi_start && (p[-1] == ' ' || p[-1] == '\t')) p--;
+if (*p != ')')
+{
+	free_def_dec (def_dec_p);
+	return;
+}
+}
+/* Now isolate a whole set of formal argument lists, one-by-one.  Normally,
+there will only be one list to isolate, but there could be more.  */
+def_dec_p->f_list_count = 0;
+for (;;)
+{
+const char *left_paren_p = find_corresponding_lparen (p);
+#ifndef UNPROTOIZE
+{
+	f_list_chain_item *cip = xmalloc (sizeof (f_list_chain_item));
+	cip->formals_list
+	  = dupnstr (left_paren_p + 1, (size_t) (p - (left_paren_p+1)));
+	/* Add the new chain item at the head of the current list.  */
+	cip->chain_next = def_dec_p->f_list_chain;
+	def_dec_p->f_list_chain = cip;
+}
+#endif /* !defined (UNPROTOIZE) */
+def_dec_p->f_list_count++;
+p = left_paren_p - 2;
+/* p must now point either to another right paren, or to the last
+	 character of the name of the function that was declared/defined.
+	 If p points to another right paren, then this indicates that we
+	 are dealing with multiple formals lists.  In that case, there
+	 really should be another right paren preceding this right paren.  */
+if (*p != ')')
+	break;
+else
+	check_aux_info (*--p == ')');
+}
+{
+const char *past_fn = p + 1;
+check_aux_info (*past_fn == ' ');
+/* Scan leftwards over the identifier that names the function.  */
+while (is_id_char (*p))
+p--;
+p++;
+/* p now points to the leftmost character of the function name.  */
+{
+char *fn_string = alloca (past_fn - p + 1);
+strncpy (fn_string, p, (size_t) (past_fn - p));
+fn_string[past_fn-p] = '\0';
+def_dec_p->hash_entry = lookup (function_name_primary, fn_string);
+}
+}
+/* Look at all of the defs and decs for this function name that we have
+collected so far.  If there is already one which is at the same
+line number in the same file, then we can discard this new def_dec_info
+record.
+As an extra assurance that any such pair of (nominally) identical
+function declarations are in fact identical, we also compare the
+ansi_decl parts of the lines from the aux_info files just to be on
+the safe side.
+This comparison will fail if (for instance) the user was playing
+messy games with the preprocessor which ultimately causes one
+function declaration in one header file to look differently when
+that file is included by two (or more) other files.  */
+{
+const def_dec_info *other;
+for (other = def_dec_p->hash_entry->ddip; other; other = other->next_for_func)
+{
+	if (def_dec_p->line == other->line && def_dec_p->file == other->file)
+	  {
+	    if (strcmp (def_dec_p->ansi_decl, other->ansi_decl))
+	      {
+	        notice ("%s:%d: declaration of function '%s' takes different forms\n",
+			def_dec_p->file->hash_entry->symbol,
+			def_dec_p->line,
+			def_dec_p->hash_entry->symbol);
+	        exit (FATAL_EXIT_CODE);
+	      }
+	    free_def_dec (def_dec_p);
+	    return;
+	  }
+}
+}
+#ifdef UNPROTOIZE
+/* If we are doing unprotoizing, we must now setup the pointers that will
+point to the K&R name list and to the K&R argument declarations list.
+Note that if this is only a function declaration, then we should not
+expect to find any K&R style formals list following the ANSI-style
+formals list.  This is because GCC knows that such information is
+useless in the case of function declarations (function definitions
+are a different story however).
+Since we are unprotoizing, we don't need any such lists anyway.
+All we plan to do is to delete all characters between ()'s in any
+case.  */
+def_dec_p->formal_names = NULL;
+def_dec_p->formal_decls = NULL;
+if (def_dec_p->is_func_def)
+{
+p = semicolon_p;
+check_aux_info (*++p == ' ');
+check_aux_info (*++p == '/');
+check_aux_info (*++p == '*');
+check_aux_info (*++p == ' ');
+check_aux_info (*++p == '(');
+{
+	const char *kr_names_start = ++p;   /* Point just inside '('.  */
+	while (*p++ != ')')
+	  continue;
+	p--;		/* point to closing right paren */
+	/* Make a copy of the K&R parameter names list.  */
+	def_dec_p->formal_names
+	  = dupnstr (kr_names_start, (size_t) (p - kr_names_start));
+}
+check_aux_info (*++p == ' ');
+p++;
+/* p now points to the first character of the K&R style declarations
+	 list (if there is one) or to the star-slash combination that ends
+	 the comment in which such lists get embedded.  */
+/* Make a copy of the K&R formal decls list and set the def_dec record
+	 to point to it.  */
+if (*p == '*')		/* Are there no K&R declarations? */
+	{
+	  check_aux_info (*++p == '/');
+	  def_dec_p->formal_decls = "";
+	}
+else
+	{
+	  const char *kr_decls_start = p;
+	  while (p[0] != '*' || p[1] != '/')
+	    p++;
+	  p--;
+	  check_aux_info (*p == ' ');
+	  def_dec_p->formal_decls
+	    = dupnstr (kr_decls_start, (size_t) (p - kr_decls_start));
+	}
+/* Handle a special case.  If we have a function definition marked as
+	 being in "old" style, and if its formal names list is empty, then
+	 it may actually have the string "void" in its real formals list
+	 in the original source code.  Just to make sure, we will get setup
+	 to convert such things anyway.
+	 This kludge only needs to be here because of an insurmountable
+	 problem with generating .X files.  */
+if (!def_dec_p->prototyped && !*def_dec_p->formal_names)
+	def_dec_p->prototyped = 1;
+}
+/* Since we are unprotoizing, if this item is already in old (K&R) style,
+we can just ignore it.  If that is true, throw away the item now.  */
+if (!def_dec_p->prototyped)
+{
+free_def_dec (def_dec_p);
+return;
+}
+#endif /* defined (UNPROTOIZE) */
+/* Add this record to the head of the list of records pertaining to this
+particular function name.  */
+def_dec_p->next_for_func = def_dec_p->hash_entry->ddip;
+def_dec_p->hash_entry->ddip = def_dec_p;
+/* Add this new def_dec_info record to the sorted list of def_dec_info
+records for this file.  Note that we don't have to worry about duplicates
+(caused by multiple inclusions of header files) here because we have
+already eliminated duplicates above.  */
+if (!def_dec_p->file->defs_decs)
+{
+def_dec_p->file->defs_decs = def_dec_p;
+def_dec_p->next_in_file = NULL;
+}
+else
+{
+int line = def_dec_p->line;
+const def_dec_info *prev = NULL;
+const def_dec_info *curr = def_dec_p->file->defs_decs;
+const def_dec_info *next = curr->next_in_file;
+while (next && (line < curr->line))
+	{
+	  prev = curr;
+	  curr = next;
+	  next = next->next_in_file;
+	}
+if (line >= curr->line)
+	{
+	  def_dec_p->next_in_file = curr;
+	  if (prev)
+	    ((NONCONST def_dec_info *) prev)->next_in_file = def_dec_p;
+	  else
+	    def_dec_p->file->defs_decs = def_dec_p;
+	}
+else	/* assert (next == NULL); */
+	{
+	  ((NONCONST def_dec_info *) curr)->next_in_file = def_dec_p;
+	  /* assert (next == NULL); */
+	  def_dec_p->next_in_file = next;
+	}
+}
+}
+/* Set up the vector COMPILE_PARAMS which is the argument list for running GCC.
+Also set input_file_name_index and aux_info_file_name_index
+to the indices of the slots where the file names should go.  */
+/* We initialize the vector by  removing -g, -O, -S, -c, and -o options,
+and adding '-aux-info AUXFILE -S  -o /dev/null INFILE' at the end.  */
+static void
+munge_compile_params (const char *params_list)
+{
+/* Build up the contents in a temporary vector
+that is so big that to has to be big enough.  */
+const char **temp_params
+= alloca ((strlen (params_list) + 8) * sizeof (char *));
+int param_count = 0;
+const char *param;
+struct stat st;
+temp_params[param_count++] = compiler_file_name;
+for (;;)
+{
+while (ISSPACE ((const unsigned char)*params_list))
+	params_list++;
+if (!*params_list)
+	break;
+param = params_list;
+while (*params_list && !ISSPACE ((const unsigned char)*params_list))
+	params_list++;
+if (param[0] != '-')
+	temp_params[param_count++]
+	  = dupnstr (param, (size_t) (params_list - param));
+else
+	{
+	  switch (param[1])
+	    {
+	    case 'g':
+	    case 'O':
+	    case 'S':
+	    case 'c':
+	      break;		/* Don't copy these.  */
+	    case 'o':
+	      while (ISSPACE ((const unsigned char)*params_list))
+		params_list++;
+	      while (*params_list
+		     && !ISSPACE ((const unsigned char)*params_list))
+		params_list++;
+	      break;
+	    default:
+	      temp_params[param_count++]
+		= dupnstr (param, (size_t) (params_list - param));
+	    }
+	}
+if (!*params_list)
+	break;
+}
+temp_params[param_count++] = "-aux-info";
+/* Leave room for the aux-info file name argument.  */
+aux_info_file_name_index = param_count;
+temp_params[param_count++] = NULL;
+temp_params[param_count++] = "-S";
+temp_params[param_count++] = "-o";
+if ((stat (HOST_BIT_BUCKET, &st) == 0)
+&& (!S_ISDIR (st.st_mode))
+&& (access (HOST_BIT_BUCKET, W_OK) == 0))
+temp_params[param_count++] = HOST_BIT_BUCKET;
+else
+/* FIXME: This is hardly likely to be right, if HOST_BIT_BUCKET is not
+writable.  But until this is rejigged to use make_temp_file(), this
+is the best we can do.  */
+temp_params[param_count++] = "/dev/null";
+/* Leave room for the input file name argument.  */
+input_file_name_index = param_count;
+temp_params[param_count++] = NULL;
+/* Terminate the list.  */
+temp_params[param_count++] = NULL;
+/* Make a copy of the compile_params in heap space.  */
+compile_params = xmalloc (sizeof (char *) * (param_count+1));
+memcpy (compile_params, temp_params, sizeof (char *) * param_count);
+}
+/* Do a recompilation for the express purpose of generating a new aux_info
+file to go with a specific base source file.
+The result is a boolean indicating success.  */
+static int
+gen_aux_info_file (const char *base_filename)
+{
+if (!input_file_name_index)
+munge_compile_params ("");
+/* Store the full source file name in the argument vector.  */
+compile_params[input_file_name_index] = shortpath (NULL, base_filename);
+/* Add .X to source file name to get aux-info file name.  */
+compile_params[aux_info_file_name_index] =
+concat (compile_params[input_file_name_index], aux_info_suffix, NULL);
+if (!quiet_flag)
+notice ("%s: compiling '%s'\n",
+	    pname, compile_params[input_file_name_index]);
+{
+char *errmsg_fmt, *errmsg_arg;
+int wait_status, pid;
+pid = pexecute (compile_params[0], (char * const *) compile_params,
+		    pname, NULL, &errmsg_fmt, &errmsg_arg,
+		    PEXECUTE_FIRST | PEXECUTE_LAST | PEXECUTE_SEARCH);
+if (pid == -1)
+{
+	int errno_val = errno;
+	fprintf (stderr, "%s: ", pname);
+	fprintf (stderr, errmsg_fmt, errmsg_arg);
+	fprintf (stderr, ": %s\n", xstrerror (errno_val));
+	return 0;
+}
+pid = pwait (pid, &wait_status, 0);
+if (pid == -1)
+{
+	notice ("%s: wait: %s\n", pname, xstrerror (errno));
+	return 0;
+}
+if (WIFSIGNALED (wait_status))
+{
+	notice ("%s: subprocess got fatal signal %d\n",
+		pname, WTERMSIG (wait_status));
+	return 0;
+}
+if (WIFEXITED (wait_status))
+{
+	if (WEXITSTATUS (wait_status) != 0)
+	  {
+	    notice ("%s: %s exited with status %d\n",
+		    pname, compile_params[0], WEXITSTATUS (wait_status));
+	    return 0;
+	  }
+	return 1;
+}
+gcc_unreachable ();
+}
+}
+/* Read in all of the information contained in a single aux_info file.
+Save all of the important stuff for later.  */
+static void
+process_aux_info_file (const char *base_source_filename, int keep_it,
+		       int is_syscalls)
+{
+size_t base_len = strlen (base_source_filename);
+char * aux_info_filename = alloca (base_len + strlen (aux_info_suffix) + 1);
+char *aux_info_base;
+char *aux_info_limit;
+char *aux_info_relocated_name;
+const char *aux_info_second_line;
+time_t aux_info_mtime;
+size_t aux_info_size;
+int must_create;
+/* Construct the aux_info filename from the base source filename.  */
+strcpy (aux_info_filename, base_source_filename);
+strcat (aux_info_filename, aux_info_suffix);
+/* Check that the aux_info file exists and is readable.  If it does not
+exist, try to create it (once only).  */
+/* If file doesn't exist, set must_create.
+Likewise if it exists and we can read it but it is obsolete.
+Otherwise, report an error.  */
+must_create = 0;
+/* Come here with must_create set to 1 if file is out of date.  */
+start_over: ;
+if (access (aux_info_filename, R_OK) == -1)
+{
+if (errno == ENOENT)
+	{
+	  if (is_syscalls)
+	    {
+	      notice ("%s: warning: missing SYSCALLS file '%s'\n",
+		      pname, aux_info_filename);
+	      return;
+	    }
+	  must_create = 1;
+	}
+else
+	{
+	  int errno_val = errno;
+	  notice ("%s: can't read aux info file '%s': %s\n",
+		  pname, shortpath (NULL, aux_info_filename),
+		  xstrerror (errno_val));
+	  errors++;
+	  return;
+	}
+}
+#if 0 /* There is code farther down to take care of this.  */
+else
+{
+struct stat s1, s2;
+stat (aux_info_file_name, &s1);
+stat (base_source_file_name, &s2);
+if (s2.st_mtime > s1.st_mtime)
+	must_create = 1;
+}
+#endif /* 0 */
+/* If we need a .X file, create it, and verify we can read it.  */
+if (must_create)
+{
+if (!gen_aux_info_file (base_source_filename))
+	{
+	  errors++;
+	  return;
+	}
+if (access (aux_info_filename, R_OK) == -1)
+	{
+	  int errno_val = errno;
+	  notice ("%s: can't read aux info file '%s': %s\n",
+		  pname, shortpath (NULL, aux_info_filename),
+		  xstrerror (errno_val));
+	  errors++;
+	  return;
+	}
+}
+{
+struct stat stat_buf;
+/* Get some status information about this aux_info file.  */
+if (stat (aux_info_filename, &stat_buf) == -1)
+{
+	int errno_val = errno;
+	notice ("%s: can't get status of aux info file '%s': %s\n",
+		pname, shortpath (NULL, aux_info_filename),
+		xstrerror (errno_val));
+	errors++;
+	return;
+}
+/* Check on whether or not this aux_info file is zero length.  If it is,
+then just ignore it and return.  */
+if ((aux_info_size = stat_buf.st_size) == 0)
+return;
+/* Get the date/time of last modification for this aux_info file and
+remember it.  We will have to check that any source files that it
+contains information about are at least this old or older.  */
+aux_info_mtime = stat_buf.st_mtime;
+if (!is_syscalls)
+{
+	/* Compare mod time with the .c file; update .X file if obsolete.
+	   The code later on can fail to check the .c file
+	   if it did not directly define any functions.  */
+	if (stat (base_source_filename, &stat_buf) == -1)
+	  {
+	    int errno_val = errno;
+	    notice ("%s: can't get status of aux info file '%s': %s\n",
+		    pname, shortpath (NULL, base_source_filename),
+		    xstrerror (errno_val));
+	    errors++;
+	    return;
+	  }
+	if (stat_buf.st_mtime > aux_info_mtime)
+	  {
+	    must_create = 1;
+	    goto start_over;
+	  }
+}
+}
+{
+int aux_info_file;
+int fd_flags;
+/* Open the aux_info file.  */
+fd_flags = O_RDONLY;
+#ifdef O_BINARY
+/* Use binary mode to avoid having to deal with different EOL characters.  */
+fd_flags |= O_BINARY;
+#endif
+if ((aux_info_file = open (aux_info_filename, fd_flags, 0444 )) == -1)
+{
+	int errno_val = errno;
+	notice ("%s: can't open aux info file '%s' for reading: %s\n",
+		pname, shortpath (NULL, aux_info_filename),
+		xstrerror (errno_val));
+	return;
+}
+/* Allocate space to hold the aux_info file in memory.  */
+aux_info_base = xmalloc (aux_info_size + 1);
+aux_info_limit = aux_info_base + aux_info_size;
+*aux_info_limit = '\0';
+/* Read the aux_info file into memory.  */
+if (safe_read (aux_info_file, aux_info_base, aux_info_size) !=
+	(int) aux_info_size)
+{
+	int errno_val = errno;
+	notice ("%s: error reading aux info file '%s': %s\n",
+		pname, shortpath (NULL, aux_info_filename),
+		xstrerror (errno_val));
+	free (aux_info_base);
+	close (aux_info_file);
+	return;
+}
+/* Close the aux info file.  */
+if (close (aux_info_file))
+{
+	int errno_val = errno;
+	notice ("%s: error closing aux info file '%s': %s\n",
+		pname, shortpath (NULL, aux_info_filename),
+		xstrerror (errno_val));
+	free (aux_info_base);
+	close (aux_info_file);
+	return;
+}
+}
+/* Delete the aux_info file (unless requested not to).  If the deletion
+fails for some reason, don't even worry about it.  */
+if (must_create && !keep_it)
+if (unlink (aux_info_filename) == -1)
+{
+	int errno_val = errno;
+	notice ("%s: can't delete aux info file '%s': %s\n",
+		pname, shortpath (NULL, aux_info_filename),
+		xstrerror (errno_val));
+}
+/* Save a pointer into the first line of the aux_info file which
+contains the filename of the directory from which the compiler
+was invoked when the associated source file was compiled.
+This information is used later to help create complete
+filenames out of the (potentially) relative filenames in
+the aux_info file.  */
+{
+char *p = aux_info_base;
+while (*p != ':'
+#ifdef HAVE_DOS_BASED_FILE_SYSTEM
+	   || (*p == ':' && *p && *(p+1) && IS_DIR_SEPARATOR (*(p+1)))
+#endif
+	   )
+p++;
+p++;
+while (*p == ' ')
+p++;
+invocation_filename = p;	/* Save a pointer to first byte of path.  */
+while (*p != ' ')
+p++;
+*p++ = DIR_SEPARATOR;
+*p++ = '\0';
+while (*p++ != '\n')
+continue;
+aux_info_second_line = p;
+aux_info_relocated_name = 0;
+if (! IS_ABSOLUTE_PATH (invocation_filename))
+{
+	/* INVOCATION_FILENAME is relative;
+	   append it to BASE_SOURCE_FILENAME's dir.  */
+	char *dir_end;
+	aux_info_relocated_name = xmalloc (base_len + (p-invocation_filename));
+	strcpy (aux_info_relocated_name, base_source_filename);
+	dir_end = strrchr (aux_info_relocated_name, DIR_SEPARATOR);
+#ifdef DIR_SEPARATOR_2
+	{
+	  char *slash;
+	  slash = strrchr (dir_end ? dir_end : aux_info_relocated_name,
+			   DIR_SEPARATOR_2);
+	  if (slash)
+	    dir_end = slash;
+	}
+#endif
+	if (dir_end)
+	  dir_end++;
+	else
+	  dir_end = aux_info_relocated_name;
+	strcpy (dir_end, invocation_filename);
+	invocation_filename = aux_info_relocated_name;
+}
+}
+{
+const char *aux_info_p;
+/* Do a pre-pass on the lines in the aux_info file, making sure that all
+of the source files referenced in there are at least as old as this
+aux_info file itself.  If not, go back and regenerate the aux_info
+file anew.  Don't do any of this for the syscalls file.  */
+if (!is_syscalls)
+{
+	current_aux_info_lineno = 2;
+	for (aux_info_p = aux_info_second_line; *aux_info_p; )
+	  {
+	    if (referenced_file_is_newer (aux_info_p, aux_info_mtime))
+	      {
+		free (aux_info_base);
+		free (aux_info_relocated_name);
+		if (keep_it && unlink (aux_info_filename) == -1)
+		  {
+		    int errno_val = errno;
+	            notice ("%s: can't delete file '%s': %s\n",
+			    pname, shortpath (NULL, aux_info_filename),
+			    xstrerror (errno_val));
+	            return;
+	          }
+		must_create = 1;
+	        goto start_over;
+	      }
+	    /* Skip over the rest of this line to start of next line.  */
+	    while (*aux_info_p != '\n')
+	      aux_info_p++;
+	    aux_info_p++;
+	    current_aux_info_lineno++;
+	  }
+}
+/* Now do the real pass on the aux_info lines.  Save their information in
+the in-core data base.  */
+current_aux_info_lineno = 2;
+for (aux_info_p = aux_info_second_line; *aux_info_p;)
+{
+	char *unexpanded_line = unexpand_if_needed (aux_info_p);
+	if (unexpanded_line)
+	  {
+	    save_def_or_dec (unexpanded_line, is_syscalls);
+	    free (unexpanded_line);
+	  }
+	else
+	  save_def_or_dec (aux_info_p, is_syscalls);
+	/* Skip over the rest of this line and get to start of next line.  */
+	while (*aux_info_p != '\n')
+	  aux_info_p++;
+	aux_info_p++;
+	current_aux_info_lineno++;
+}
+}
+free (aux_info_base);
+free (aux_info_relocated_name);
+}
+#ifndef UNPROTOIZE
+/* Check an individual filename for a .c suffix.  If the filename has this
+suffix, rename the file such that its suffix is changed to .C.  This
+function implements the -C option.  */
+static void
+rename_c_file (const hash_table_entry *hp)
+{
+const char *filename = hp->symbol;
+int last_char_index = strlen (filename) - 1;
+char *const new_filename = alloca (strlen (filename)
+				     + strlen (cplus_suffix) + 1);
+/* Note that we don't care here if the given file was converted or not.  It
+is possible that the given file was *not* converted, simply because there
+was nothing in it which actually required conversion.  Even in this case,
+we want to do the renaming.  Note that we only rename files with the .c
+suffix (except for the syscalls file, which is left alone).  */
+if (filename[last_char_index] != 'c' || filename[last_char_index-1] != '.'
+|| IS_SAME_PATH (syscalls_absolute_filename, filename))
+return;
+strcpy (new_filename, filename);
+strcpy (&new_filename[last_char_index], cplus_suffix);
+if (rename (filename, new_filename) == -1)
+{
+int errno_val = errno;
+notice ("%s: warning: can't rename file '%s' to '%s': %s\n",
+	      pname, shortpath (NULL, filename),
+	      shortpath (NULL, new_filename), xstrerror (errno_val));
+errors++;
+return;
+}
+}
+#endif /* !defined (UNPROTOIZE) */
+/* Take the list of definitions and declarations attached to a particular
+file_info node and reverse the order of the list.  This should get the
+list into an order such that the item with the lowest associated line
+number is nearest the head of the list.  When these lists are originally
+built, they are in the opposite order.  We want to traverse them in
+normal line number order later (i.e. lowest to highest) so reverse the
+order here.  */
+static void
+reverse_def_dec_list (const hash_table_entry *hp)
+{
+file_info *file_p = hp->fip;
+def_dec_info *prev = NULL;
+def_dec_info *current = (def_dec_info *) file_p->defs_decs;
+if (!current)
+return;        		/* no list to reverse */
+prev = current;
+if (! (current = (def_dec_info *) current->next_in_file))
+return;        		/* can't reverse a single list element */
+prev->next_in_file = NULL;
+while (current)
+{
+def_dec_info *next = (def_dec_info *) current->next_in_file;
+current->next_in_file = prev;
+prev = current;
+current = next;
+}
+file_p->defs_decs = prev;
+}
+#ifndef UNPROTOIZE
+/* Find the (only?) extern definition for a particular function name, starting
+from the head of the linked list of entries for the given name.  If we
+cannot find an extern definition for the given function name, issue a
+warning and scrounge around for the next best thing, i.e. an extern
+function declaration with a prototype attached to it.  Note that we only
+allow such substitutions for extern declarations and never for static
+declarations.  That's because the only reason we allow them at all is
+to let un-prototyped function declarations for system-supplied library
+functions get their prototypes from our own extra SYSCALLS.c.X file which
+contains all of the correct prototypes for system functions.  */
+static const def_dec_info *
+find_extern_def (const def_dec_info *head, const def_dec_info *user)
+{
+const def_dec_info *dd_p;
+const def_dec_info *extern_def_p = NULL;
+int conflict_noted = 0;
+/* Don't act too stupid here.  Somebody may try to convert an entire system
+in one swell fwoop (rather than one program at a time, as should be done)
+and in that case, we may find that there are multiple extern definitions
+of a given function name in the entire set of source files that we are
+converting.  If however one of these definitions resides in exactly the
+same source file as the reference we are trying to satisfy then in that
+case it would be stupid for us to fail to realize that this one definition
+*must* be the precise one we are looking for.
+To make sure that we don't miss an opportunity to make this "same file"
+leap of faith, we do a prescan of the list of records relating to the
+given function name, and we look (on this first scan) *only* for a
+definition of the function which is in the same file as the reference
+we are currently trying to satisfy.  */
+for (dd_p = head; dd_p; dd_p = dd_p->next_for_func)
+if (dd_p->is_func_def && !dd_p->is_static && dd_p->file == user->file)
+return dd_p;
+/* Now, since we have not found a definition in the same file as the
+reference, we scan the list again and consider all possibilities from
+all files.  Here we may get conflicts with the things listed in the
+SYSCALLS.c.X file, but if that happens it only means that the source
+code being converted contains its own definition of a function which
+could have been supplied by libc.a.  In such cases, we should avoid
+issuing the normal warning, and defer to the definition given in the
+user's own code.  */
+for (dd_p = head; dd_p; dd_p = dd_p->next_for_func)
+if (dd_p->is_func_def && !dd_p->is_static)
+{
+	if (!extern_def_p)	/* Previous definition? */
+	  extern_def_p = dd_p;	/* Remember the first definition found.  */
+	else
+	  {
+	    /* Ignore definition just found if it came from SYSCALLS.c.X.  */
+	    if (is_syscalls_file (dd_p->file))
+	      continue;
+	    /* Quietly replace the definition previously found with the one
+	       just found if the previous one was from SYSCALLS.c.X.  */
+	    if (is_syscalls_file (extern_def_p->file))
+	      {
+	        extern_def_p = dd_p;
+	        continue;
+	      }
+	    /* If we get here, then there is a conflict between two function
+	       declarations for the same function, both of which came from the
+	       user's own code.  */
+	    if (!conflict_noted)	/* first time we noticed? */
+	      {
+		conflict_noted = 1;
+		notice ("%s: conflicting extern definitions of '%s'\n",
+			pname, head->hash_entry->symbol);
+		if (!quiet_flag)
+		  {
+		    notice ("%s: declarations of '%s' will not be converted\n",
+			    pname, head->hash_entry->symbol);
+		    notice ("%s: conflict list for '%s' follows:\n",
+			    pname, head->hash_entry->symbol);
+		    fprintf (stderr, "%s:     %s(%d): %s\n",
+			     pname,
+			     shortpath (NULL, extern_def_p->file->hash_entry->symbol),
+			     extern_def_p->line, extern_def_p->ansi_decl);
+		  }
+	      }
+	    if (!quiet_flag)
+	      fprintf (stderr, "%s:     %s(%d): %s\n",
+		       pname,
+		       shortpath (NULL, dd_p->file->hash_entry->symbol),
+		       dd_p->line, dd_p->ansi_decl);
+	  }
+}
+/* We want to err on the side of caution, so if we found multiple conflicting
+definitions for the same function, treat this as being that same as if we
+had found no definitions (i.e. return NULL).  */
+if (conflict_noted)
+return NULL;
+if (!extern_def_p)
+{
+/* We have no definitions for this function so do the next best thing.
+	 Search for an extern declaration already in prototype form.  */
+for (dd_p = head; dd_p; dd_p = dd_p->next_for_func)
+	if (!dd_p->is_func_def && !dd_p->is_static && dd_p->prototyped)
+	  {
+	    extern_def_p = dd_p;	/* save a pointer to the definition */
+	    if (!quiet_flag)
+	      notice ("%s: warning: using formals list from %s(%d) for function '%s'\n",
+		      pname,
+		      shortpath (NULL, dd_p->file->hash_entry->symbol),
+		      dd_p->line, dd_p->hash_entry->symbol);
+	    break;
+	  }
+/* Gripe about unprototyped function declarations that we found no
+	 corresponding definition (or other source of prototype information)
+	 for.
+	 Gripe even if the unprototyped declaration we are worried about
+	 exists in a file in one of the "system" include directories.  We
+	 can gripe about these because we should have at least found a
+	 corresponding (pseudo) definition in the SYSCALLS.c.X file.  If we
+	 didn't, then that means that the SYSCALLS.c.X file is missing some
+	 needed prototypes for this particular system.  That is worth telling
+	 the user about!  */
+if (!extern_def_p)
+	{
+	  const char *file = user->file->hash_entry->symbol;
+	  if (!quiet_flag)
+	    if (in_system_include_dir (file))
+	      {
+		/* Why copy this string into `needed' at all?
+		   Why not just use user->ansi_decl without copying?  */
+		char *needed = alloca (strlen (user->ansi_decl) + 1);
+	        char *p;
+	        strcpy (needed, user->ansi_decl);
+	        p = strstr (needed, user->hash_entry->symbol)
+	            + strlen (user->hash_entry->symbol) + 2;
+		/* Avoid having ??? in the string.  */
+		*p++ = '?';
+		*p++ = '?';
+		*p++ = '?';
+	        strcpy (p, ");");
+	        notice ("%s: %d: '%s' used but missing from SYSCALLS\n",
+			shortpath (NULL, file), user->line,
+			needed+7);	/* Don't print "extern " */
+	      }
+#if 0
+	    else
+	      notice ("%s: %d: warning: no extern definition for '%s'\n",
+		      shortpath (NULL, file), user->line,
+		      user->hash_entry->symbol);
+#endif
+	}
+}
+return extern_def_p;
+}
+/* Find the (only?) static definition for a particular function name in a
+given file.  Here we get the function-name and the file info indirectly
+from the def_dec_info record pointer which is passed in.  */
+static const def_dec_info *
+find_static_definition (const def_dec_info *user)
+{
+const def_dec_info *head = user->hash_entry->ddip;
+const def_dec_info *dd_p;
+int num_static_defs = 0;
+const def_dec_info *static_def_p = NULL;
+for (dd_p = head; dd_p; dd_p = dd_p->next_for_func)
+if (dd_p->is_func_def && dd_p->is_static && (dd_p->file == user->file))
+{
+	static_def_p = dd_p;	/* save a pointer to the definition */
+	num_static_defs++;
+}
+if (num_static_defs == 0)
+{
+if (!quiet_flag)
+	notice ("%s: warning: no static definition for '%s' in file '%s'\n",
+		pname, head->hash_entry->symbol,
+		shortpath (NULL, user->file->hash_entry->symbol));
+}
+else if (num_static_defs > 1)
+{
+notice ("%s: multiple static defs of '%s' in file '%s'\n",
+	      pname, head->hash_entry->symbol,
+	      shortpath (NULL, user->file->hash_entry->symbol));
+return NULL;
+}
+return static_def_p;
+}
+/* Find good prototype style formal argument lists for all of the function
+declarations which didn't have them before now.
+To do this we consider each function name one at a time.  For each function
+name, we look at the items on the linked list of def_dec_info records for
+that particular name.
+Somewhere on this list we should find one (and only one) def_dec_info
+record which represents the actual function definition, and this record
+should have a nice formal argument list already associated with it.
+Thus, all we have to do is to connect up all of the other def_dec_info
+records for this particular function name to the special one which has
+the full-blown formals list.
+Of course it is a little more complicated than just that.  See below for
+more details.  */
+static void
+connect_defs_and_decs (const hash_table_entry *hp)
+{
+const def_dec_info *dd_p;
+const def_dec_info *extern_def_p = NULL;
+int first_extern_reference = 1;
+/* Traverse the list of definitions and declarations for this particular
+function name.  For each item on the list, if it is a function
+definition (either old style or new style) then GCC has already been
+kind enough to produce a prototype for us, and it is associated with
+the item already, so declare the item as its own associated "definition".
+Also, for each item which is only a function declaration, but which
+nonetheless has its own prototype already (obviously supplied by the user)
+declare the item as its own definition.
+Note that when/if there are multiple user-supplied prototypes already
+present for multiple declarations of any given function, these multiple
+prototypes *should* all match exactly with one another and with the
+prototype for the actual function definition.  We don't check for this
+here however, since we assume that the compiler must have already done
+this consistency checking when it was creating the .X files.  */
+for (dd_p = hp->ddip; dd_p; dd_p = dd_p->next_for_func)
+if (dd_p->prototyped)
+((NONCONST def_dec_info *) dd_p)->definition = dd_p;
+/* Traverse the list of definitions and declarations for this particular
+function name.  For each item on the list, if it is an extern function
+declaration and if it has no associated definition yet, go try to find
+the matching extern definition for the declaration.
+When looking for the matching function definition, warn the user if we
+fail to find one.
+If we find more that one function definition also issue a warning.
+Do the search for the matching definition only once per unique function
+name (and only when absolutely needed) so that we can avoid putting out
+redundant warning messages, and so that we will only put out warning
+messages when there is actually a reference (i.e. a declaration) for
+which we need to find a matching definition.  */
+for (dd_p = hp->ddip; dd_p; dd_p = dd_p->next_for_func)
+if (!dd_p->is_func_def && !dd_p->is_static && !dd_p->definition)
+{
+	if (first_extern_reference)
+	  {
+	    extern_def_p = find_extern_def (hp->ddip, dd_p);
+	    first_extern_reference = 0;
+	  }
+	((NONCONST def_dec_info *) dd_p)->definition = extern_def_p;
+}
+/* Traverse the list of definitions and declarations for this particular
+function name.  For each item on the list, if it is a static function
+declaration and if it has no associated definition yet, go try to find
+the matching static definition for the declaration within the same file.
+When looking for the matching function definition, warn the user if we
+fail to find one in the same file with the declaration, and refuse to
+convert this kind of cross-file static function declaration.  After all,
+this is stupid practice and should be discouraged.
+We don't have to worry about the possibility that there is more than one
+matching function definition in the given file because that would have
+been flagged as an error by the compiler.
+Do the search for the matching definition only once per unique
+function-name/source-file pair (and only when absolutely needed) so that
+we can avoid putting out redundant warning messages, and so that we will
+only put out warning messages when there is actually a reference (i.e. a
+declaration) for which we actually need to find a matching definition.  */
+for (dd_p = hp->ddip; dd_p; dd_p = dd_p->next_for_func)
+if (!dd_p->is_func_def && dd_p->is_static && !dd_p->definition)
+{
+	const def_dec_info *dd_p2;
+	const def_dec_info *static_def;
+	/* We have now found a single static declaration for which we need to
+	   find a matching definition.  We want to minimize the work (and the
+	   number of warnings), so we will find an appropriate (matching)
+	   static definition for this declaration, and then distribute it
+	   (as the definition for) any and all other static declarations
+	   for this function name which occur within the same file, and which
+	   do not already have definitions.
+	   Note that a trick is used here to prevent subsequent attempts to
+	   call find_static_definition for a given function-name & file
+	   if the first such call returns NULL.  Essentially, we convert
+	   these NULL return values to -1, and put the -1 into the definition
+	   field for each other static declaration from the same file which
+	   does not already have an associated definition.
+	   This makes these other static declarations look like they are
+	   actually defined already when the outer loop here revisits them
+	   later on.  Thus, the outer loop will skip over them.  Later, we
+	   turn the -1's back to NULL's.  */
+	((NONCONST def_dec_info *) dd_p)->definition =
+	  (static_def = find_static_definition (dd_p))
+	  ? static_def
+	  : (const def_dec_info *) -1;
+	for (dd_p2 = dd_p->next_for_func; dd_p2; dd_p2 = dd_p2->next_for_func)
+	  if (!dd_p2->is_func_def && dd_p2->is_static
+	      && !dd_p2->definition && (dd_p2->file == dd_p->file))
+	    ((NONCONST def_dec_info *) dd_p2)->definition = dd_p->definition;
+}
+/* Convert any dummy (-1) definitions we created in the step above back to
+NULL's (as they should be).  */
+for (dd_p = hp->ddip; dd_p; dd_p = dd_p->next_for_func)
+if (dd_p->definition == (def_dec_info *) -1)
+((NONCONST def_dec_info *) dd_p)->definition = NULL;
+}
+#endif /* !defined (UNPROTOIZE) */
+/* Give a pointer into the clean text buffer, return a number which is the
+original source line number that the given pointer points into.  */
+static int
+identify_lineno (const char *clean_p)
+{
+int line_num = 1;
+const char *scan_p;
+for (scan_p = clean_text_base; scan_p <= clean_p; scan_p++)
+if (*scan_p == '\n')
+line_num++;
+return line_num;
+}
+/* Issue an error message and give up on doing this particular edit.  */
+static void
+declare_source_confusing (const char *clean_p)
+{
+if (!quiet_flag)
+{
+if (clean_p == 0)
+	notice ("%s: %d: warning: source too confusing\n",
+		shortpath (NULL, convert_filename), last_known_line_number);
+else
+	notice ("%s: %d: warning: source too confusing\n",
+		shortpath (NULL, convert_filename),
+		identify_lineno (clean_p));
+}
+longjmp (source_confusion_recovery, 1);
+}
+/* Check that a condition which is expected to be true in the original source
+code is in fact true.  If not, issue an error message and give up on
+converting this particular source file.  */
+static void
+check_source (int cond, const char *clean_p)
+{
+if (!cond)
+declare_source_confusing (clean_p);
+}
+/* If we think of the in-core cleaned text buffer as a memory mapped
+file (with the variable last_known_line_start acting as sort of a
+file pointer) then we can imagine doing "seeks" on the buffer.  The
+following routine implements a kind of "seek" operation for the in-core
+(cleaned) copy of the source file.  When finished, it returns a pointer to
+the start of a given (numbered) line in the cleaned text buffer.
+Note that protoize only has to "seek" in the forward direction on the
+in-core cleaned text file buffers, and it never needs to back up.
+This routine is made a little bit faster by remembering the line number
+(and pointer value) supplied (and returned) from the previous "seek".
+This prevents us from always having to start all over back at the top
+of the in-core cleaned buffer again.  */
+static const char *
+seek_to_line (int n)
+{
+gcc_assert (n >= last_known_line_number);
+while (n > last_known_line_number)
+{
+while (*last_known_line_start != '\n')
+	check_source (++last_known_line_start < clean_text_limit, 0);
+last_known_line_start++;
+last_known_line_number++;
+}
+return last_known_line_start;
+}
+/* Given a pointer to a character in the cleaned text buffer, return a pointer
+to the next non-whitespace character which follows it.  */
+static const char *
+forward_to_next_token_char (const char *ptr)
+{
+for (++ptr; ISSPACE ((const unsigned char)*ptr);
+check_source (++ptr < clean_text_limit, 0))
+continue;
+return ptr;
+}
+/* Copy a chunk of text of length `len' and starting at `str' to the current
+output buffer.  Note that all attempts to add stuff to the current output
+buffer ultimately go through here.  */
+static void
+output_bytes (const char *str, size_t len)
+{
+if ((repl_write_ptr + 1) + len >= repl_text_limit)
+{
+size_t new_size = (repl_text_limit - repl_text_base) << 1;
+char *new_buf = xrealloc (repl_text_base, new_size);
+repl_write_ptr = new_buf + (repl_write_ptr - repl_text_base);
+repl_text_base = new_buf;
+repl_text_limit = new_buf + new_size;
+}
+memcpy (repl_write_ptr + 1, str, len);
+repl_write_ptr += len;
+}
+/* Copy all bytes (except the trailing null) of a null terminated string to
+the current output buffer.  */
+static void
+output_string (const char *str)
+{
+output_bytes (str, strlen (str));
+}
+/* Copy some characters from the original text buffer to the current output
+buffer.
+This routine takes a pointer argument `p' which is assumed to be a pointer
+into the cleaned text buffer.  The bytes which are copied are the `original'
+equivalents for the set of bytes between the last value of `clean_read_ptr'
+and the argument value `p'.
+The set of bytes copied however, comes *not* from the cleaned text buffer,
+but rather from the direct counterparts of these bytes within the original
+text buffer.
+Thus, when this function is called, some bytes from the original text
+buffer (which may include original comments and preprocessing directives)
+will be copied into the  output buffer.
+Note that the request implied when this routine is called includes the
+byte pointed to by the argument pointer `p'.  */
+static void
+output_up_to (const char *p)
+{
+size_t copy_length = (size_t) (p - clean_read_ptr);
+const char *copy_start = orig_text_base+(clean_read_ptr-clean_text_base)+1;
+if (copy_length == 0)
+return;
+output_bytes (copy_start, copy_length);
+clean_read_ptr = p;
+}
+/* Given a pointer to a def_dec_info record which represents some form of
+definition of a function (perhaps a real definition, or in lieu of that
+perhaps just a declaration with a full prototype) return true if this
+function is one which we should avoid converting.  Return false
+otherwise.  */
+static int
+other_variable_style_function (const char *ansi_header)
+{
+#ifdef UNPROTOIZE
+/* See if we have a stdarg function, or a function which has stdarg style
+parameters or a stdarg style return type.  */
+return strstr (ansi_header, "...") != 0;
+#else /* !defined (UNPROTOIZE) */
+/* See if we have a varargs function, or a function which has varargs style
+parameters or a varargs style return type.  */
+const char *p;
+int len = strlen (varargs_style_indicator);
+for (p = ansi_header; p; )
+{
+const char *candidate;
+if ((candidate = strstr (p, varargs_style_indicator)) == 0)
+	return 0;
+else
+	if (!is_id_char (candidate[-1]) && !is_id_char (candidate[len]))
+	  return 1;
+	else
+	  p = candidate + 1;
+}
+return 0;
+#endif /* !defined (UNPROTOIZE) */
+}
+/* Do the editing operation specifically for a function "declaration".  Note
+that editing for function "definitions" are handled in a separate routine
+below.  */
+static void
+edit_fn_declaration (const def_dec_info *def_dec_p,
+		     const char *volatile clean_text_p)
+{
+const char *start_formals;
+const char *end_formals;
+const char *function_to_edit = def_dec_p->hash_entry->symbol;
+size_t func_name_len = strlen (function_to_edit);
+const char *end_of_fn_name;
+#ifndef UNPROTOIZE
+const f_list_chain_item *this_f_list_chain_item;
+const def_dec_info *definition = def_dec_p->definition;
+/* If we are protoizing, and if we found no corresponding definition for
+this particular function declaration, then just leave this declaration
+exactly as it is.  */
+if (!definition)
+return;
+/* If we are protoizing, and if the corresponding definition that we found
+for this particular function declaration defined an old style varargs
+function, then we want to issue a warning and just leave this function
+declaration unconverted.  */
+if (other_variable_style_function (definition->ansi_decl))
+{
+if (!quiet_flag)
+	notice ("%s: %d: warning: varargs function declaration not converted\n",
+		shortpath (NULL, def_dec_p->file->hash_entry->symbol),
+		def_dec_p->line);
+return;
+}
+#endif /* !defined (UNPROTOIZE) */
+/* Setup here to recover from confusing source code detected during this
+particular "edit".  */
+save_pointers ();
+if (setjmp (source_confusion_recovery))
+{
+restore_pointers ();
+notice ("%s: declaration of function '%s' not converted\n",
+	      pname, function_to_edit);
+return;
+}
+/* We are editing a function declaration.  The line number we did a seek to
+contains the comma or semicolon which follows the declaration.  Our job
+now is to scan backwards looking for the function name.  This name *must*
+be followed by open paren (ignoring whitespace, of course).  We need to
+replace everything between that open paren and the corresponding closing
+paren.  If we are protoizing, we need to insert the prototype-style
+formals lists.  If we are unprotoizing, we need to just delete everything
+between the pairs of opening and closing parens.  */
+/* First move up to the end of the line.  */
+while (*clean_text_p != '\n')
+check_source (++clean_text_p < clean_text_limit, 0);
+clean_text_p--;  /* Point to just before the newline character.  */
+/* Now we can scan backwards for the function name.  */
+do
+{
+for (;;)
+	{
+	  /* Scan leftwards until we find some character which can be
+	     part of an identifier.  */
+	  while (!is_id_char (*clean_text_p))
+	    check_source (--clean_text_p > clean_read_ptr, 0);
+	  /* Scan backwards until we find a char that cannot be part of an
+	     identifier.  */
+	  while (is_id_char (*clean_text_p))
+	    check_source (--clean_text_p > clean_read_ptr, 0);
+	  /* Having found an "id break", see if the following id is the one
+	     that we are looking for.  If so, then exit from this loop.  */
+	  if (!strncmp (clean_text_p+1, function_to_edit, func_name_len))
+	    {
+	      char ch = *(clean_text_p + 1 + func_name_len);
+	      /* Must also check to see that the name in the source text
+	         ends where it should (in order to prevent bogus matches
+	         on similar but longer identifiers.  */
+	      if (! is_id_char (ch))
+	        break;			/* exit from loop */
+	    }
+	}
+/* We have now found the first perfect match for the function name in
+	 our backward search.  This may or may not be the actual function
+	 name at the start of the actual function declaration (i.e. we could
+	 have easily been mislead).  We will try to avoid getting fooled too
+	 often by looking forward for the open paren which should follow the
+	 identifier we just found.  We ignore whitespace while hunting.  If
+	 the next non-whitespace byte we see is *not* an open left paren,
+	 then we must assume that we have been fooled and we start over
+	 again accordingly.  Note that there is no guarantee, that even if
+	 we do see the open paren, that we are in the right place.
+	 Programmers do the strangest things sometimes!  */
+end_of_fn_name = clean_text_p + strlen (def_dec_p->hash_entry->symbol);
+start_formals = forward_to_next_token_char (end_of_fn_name);
+}
+while (*start_formals != '(');
+/* start_of_formals now points to the opening left paren which immediately
+follows the name of the function.  */
+/* Note that there may be several formals lists which need to be modified
+due to the possibility that the return type of this function is a
+pointer-to-function type.  If there are several formals lists, we
+convert them in left-to-right order here.  */
+#ifndef UNPROTOIZE
+this_f_list_chain_item = definition->f_list_chain;
+#endif /* !defined (UNPROTOIZE) */
+for (;;)
+{
+{
+	int depth;
+	end_formals = start_formals + 1;
+	depth = 1;
+	for (; depth; check_source (++end_formals < clean_text_limit, 0))
+	  {
+	    switch (*end_formals)
+	      {
+	      case '(':
+		depth++;
+		break;
+	      case ')':
+		depth--;
+		break;
+	      }
+	  }
+	end_formals--;
+}
+/* end_formals now points to the closing right paren of the formals
+	 list whose left paren is pointed to by start_formals.  */
+/* Now, if we are protoizing, we insert the new ANSI-style formals list
+	 attached to the associated definition of this function.  If however
+	 we are unprotoizing, then we simply delete any formals list which
+	 may be present.  */
+output_up_to (start_formals);
+#ifndef UNPROTOIZE
+if (this_f_list_chain_item)
+	{
+	  output_string (this_f_list_chain_item->formals_list);
+	  this_f_list_chain_item = this_f_list_chain_item->chain_next;
+	}
+else
+	{
+	  if (!quiet_flag)
+	    notice ("%s: warning: too many parameter lists in declaration of '%s'\n",
+		    pname, def_dec_p->hash_entry->symbol);
+	  check_source (0, end_formals);  /* leave the declaration intact */
+	}
+#endif /* !defined (UNPROTOIZE) */
+clean_read_ptr = end_formals - 1;
+/* Now see if it looks like there may be another formals list associated
+	 with the function declaration that we are converting (following the
+	 formals list that we just converted.  */
+{
+	const char *another_r_paren = forward_to_next_token_char (end_formals);
+	if ((*another_r_paren != ')')
+	    || (*(start_formals = forward_to_next_token_char (another_r_paren)) != '('))
+	  {
+#ifndef UNPROTOIZE
+	    if (this_f_list_chain_item)
+	      {
+		if (!quiet_flag)
+		  notice ("\n%s: warning: too few parameter lists in declaration of '%s'\n",
+			  pname, def_dec_p->hash_entry->symbol);
+		check_source (0, start_formals); /* leave the decl intact */
+	      }
+#endif /* !defined (UNPROTOIZE) */
+	    break;
+	  }
+}
+/* There does appear to be yet another formals list, so loop around
+	 again, and convert it also.  */
+}
+}
+/* Edit a whole group of formals lists, starting with the rightmost one
+from some set of formals lists.  This routine is called once (from the
+outside) for each function declaration which is converted.  It is
+recursive however, and it calls itself once for each remaining formal
+list that lies to the left of the one it was originally called to work
+on.  Thus, a whole set gets done in right-to-left order.
+This routine returns nonzero if it thinks that it should not be trying
+to convert this particular function definition (because the name of the
+function doesn't match the one expected).  */
+static int
+edit_formals_lists (const char *end_formals, unsigned int f_list_count,
+		    const def_dec_info *def_dec_p)
+{
+const char *start_formals;
+int depth;
+start_formals = end_formals - 1;
+depth = 1;
+for (; depth; check_source (--start_formals > clean_read_ptr, 0))
+{
+switch (*start_formals)
+	{
+	case '(':
+	  depth--;
+	  break;
+	case ')':
+	  depth++;
+	  break;
+	}
+}
+start_formals++;
+/* start_formals now points to the opening left paren of the formals list.  */
+f_list_count--;
+if (f_list_count)
+{
+const char *next_end;
+/* There should be more formal lists to the left of here.  */
+next_end = start_formals - 1;
+check_source (next_end > clean_read_ptr, 0);
+while (ISSPACE ((const unsigned char)*next_end))
+	check_source (--next_end > clean_read_ptr, 0);
+check_source (*next_end == ')', next_end);
+check_source (--next_end > clean_read_ptr, 0);
+check_source (*next_end == ')', next_end);
+if (edit_formals_lists (next_end, f_list_count, def_dec_p))
+	return 1;
+}
+/* Check that the function name in the header we are working on is the same
+as the one we would expect to find.  If not, issue a warning and return
+nonzero.  */
+if (f_list_count == 0)
+{
+const char *expected = def_dec_p->hash_entry->symbol;
+const char *func_name_start;
+const char *func_name_limit;
+size_t func_name_len;
+for (func_name_limit = start_formals-1;
+	   ISSPACE ((const unsigned char)*func_name_limit); )
+	check_source (--func_name_limit > clean_read_ptr, 0);
+for (func_name_start = func_name_limit++;
+	   is_id_char (*func_name_start);
+	   func_name_start--)
+	check_source (func_name_start > clean_read_ptr, 0);
+func_name_start++;
+func_name_len = func_name_limit - func_name_start;
+if (func_name_len == 0)
+	check_source (0, func_name_start);
+if (func_name_len != strlen (expected)
+	  || strncmp (func_name_start, expected, func_name_len))
+	{
+	  notice ("%s: %d: warning: found '%s' but expected '%s'\n",
+		  shortpath (NULL, def_dec_p->file->hash_entry->symbol),
+		  identify_lineno (func_name_start),
+		  dupnstr (func_name_start, func_name_len),
+		  expected);
+	  return 1;
+	}
+}
+output_up_to (start_formals);
+#ifdef UNPROTOIZE
+if (f_list_count == 0)
+output_string (def_dec_p->formal_names);
+#else /* !defined (UNPROTOIZE) */
+{
+unsigned f_list_depth;
+const f_list_chain_item *flci_p = def_dec_p->f_list_chain;
+/* At this point, the current value of f_list count says how many
+links we have to follow through the f_list_chain to get to the
+particular formals list that we need to output next.  */
+for (f_list_depth = 0; f_list_depth < f_list_count; f_list_depth++)
+flci_p = flci_p->chain_next;
+output_string (flci_p->formals_list);
+}
+#endif /* !defined (UNPROTOIZE) */
+clean_read_ptr = end_formals - 1;
+return 0;
+}
+/* Given a pointer to a byte in the clean text buffer which points to
+the beginning of a line that contains a "follower" token for a
+function definition header, do whatever is necessary to find the
+right closing paren for the rightmost formals list of the function
+definition header.  */
+static const char *
+find_rightmost_formals_list (const char *clean_text_p)
+{
+const char *end_formals;
+/* We are editing a function definition.  The line number we did a seek
+to contains the first token which immediately follows the entire set of
+formals lists which are part of this particular function definition
+header.
+Our job now is to scan leftwards in the clean text looking for the
+right-paren which is at the end of the function header's rightmost
+formals list.
+If we ignore whitespace, this right paren should be the first one we
+see which is (ignoring whitespace) immediately followed either by the
+open curly-brace beginning the function body or by an alphabetic
+character (in the case where the function definition is in old (K&R)
+style and there are some declarations of formal parameters).  */
+/* It is possible that the right paren we are looking for is on the
+current line (together with its following token).  Just in case that
+might be true, we start out here by skipping down to the right end of
+the current line before starting our scan.  */
+for (end_formals = clean_text_p; *end_formals != '\n'; end_formals++)
+continue;
+end_formals--;
+#ifdef UNPROTOIZE
+/* Now scan backwards while looking for the right end of the rightmost
+formals list associated with this function definition.  */
+{
+char ch;
+const char *l_brace_p;
+/* Look leftward and try to find a right-paren.  */
+while (*end_formals != ')')
+{
+	if (ISSPACE ((unsigned char)*end_formals))
+	  while (ISSPACE ((unsigned char)*end_formals))
+	    check_source (--end_formals > clean_read_ptr, 0);
+	else
+	  check_source (--end_formals > clean_read_ptr, 0);
+}
+ch = *(l_brace_p = forward_to_next_token_char (end_formals));
+/* Since we are unprotoizing an ANSI-style (prototyped) function
+definition, there had better not be anything (except whitespace)
+between the end of the ANSI formals list and the beginning of the
+function body (i.e. the '{').  */
+check_source (ch == '{', l_brace_p);
+}
+#else /* !defined (UNPROTOIZE) */
+/* Now scan backwards while looking for the right end of the rightmost
+formals list associated with this function definition.  */
+while (1)
+{
+char ch;
+const char *l_brace_p;
+/* Look leftward and try to find a right-paren.  */
+while (*end_formals != ')')
+	{
+	  if (ISSPACE ((const unsigned char)*end_formals))
+	    while (ISSPACE ((const unsigned char)*end_formals))
+	      check_source (--end_formals > clean_read_ptr, 0);
+	  else
+	    check_source (--end_formals > clean_read_ptr, 0);
+	}
+ch = *(l_brace_p = forward_to_next_token_char (end_formals));
+/* Since it is possible that we found a right paren before the starting
+	 '{' of the body which IS NOT the one at the end of the real K&R
+	 formals list (say for instance, we found one embedded inside one of
+	 the old K&R formal parameter declarations) we have to check to be
+	 sure that this is in fact the right paren that we were looking for.
+	 The one we were looking for *must* be followed by either a '{' or
+	 by an alphabetic character, while others *cannot* validly be followed
+	 by such characters.  */
+if ((ch == '{') || ISALPHA ((unsigned char) ch))
+	break;
+/* At this point, we have found a right paren, but we know that it is
+	 not the one we were looking for, so backup one character and keep
+	 looking.  */
+check_source (--end_formals > clean_read_ptr, 0);
+}
+#endif /* !defined (UNPROTOIZE) */
+return end_formals;
+}
+#ifndef UNPROTOIZE
+/* Insert into the output file a totally new declaration for a function
+which (up until now) was being called from within the current block
+without having been declared at any point such that the declaration
+was visible (i.e. in scope) at the point of the call.
+We need to add in explicit declarations for all such function calls
+in order to get the full benefit of prototype-based function call
+parameter type checking.  */
+static void
+add_local_decl (const def_dec_info *def_dec_p, const char *clean_text_p)
+{
+const char *start_of_block;
+const char *function_to_edit = def_dec_p->hash_entry->symbol;
+/* Don't insert new local explicit declarations unless explicitly requested
+to do so.  */
+if (!local_flag)
+return;
+/* Setup here to recover from confusing source code detected during this
+particular "edit".  */
+save_pointers ();
+if (setjmp (source_confusion_recovery))
+{
+restore_pointers ();
+notice ("%s: local declaration for function '%s' not inserted\n",
+	      pname, function_to_edit);
+return;
+}
+/* We have already done a seek to the start of the line which should
+contain *the* open curly brace which begins the block in which we need
+to insert an explicit function declaration (to replace the implicit one).
+Now we scan that line, starting from the left, until we find the
+open curly brace we are looking for.  Note that there may actually be
+multiple open curly braces on the given line, but we will be happy
+with the leftmost one no matter what.  */
+start_of_block = clean_text_p;
+while (*start_of_block != '{' && *start_of_block != '\n')
+check_source (++start_of_block < clean_text_limit, 0);
+/* Note that the line from the original source could possibly
+contain *no* open curly braces!  This happens if the line contains
+a macro call which expands into a chunk of text which includes a
+block (and that block's associated open and close curly braces).
+In cases like this, we give up, issue a warning, and do nothing.  */
+if (*start_of_block != '{')
+{
+if (!quiet_flag)
+	notice ("\n%s: %d: warning: can't add declaration of '%s' into macro call\n",
+	  def_dec_p->file->hash_entry->symbol, def_dec_p->line,
+	  def_dec_p->hash_entry->symbol);
+return;
+}
+/* Figure out what a nice (pretty) indentation would be for the new
+declaration we are adding.  In order to do this, we must scan forward
+from the '{' until we find the first line which starts with some
+non-whitespace characters (i.e. real "token" material).  */
+{
+const char *ep = forward_to_next_token_char (start_of_block) - 1;
+const char *sp;
+/* Now we have ep pointing at the rightmost byte of some existing indent
+stuff.  At least that is the hope.
+We can now just scan backwards and find the left end of the existing
+indentation string, and then copy it to the output buffer.  */
+for (sp = ep; ISSPACE ((const unsigned char)*sp) && *sp != '\n'; sp--)
+continue;
+/* Now write out the open { which began this block, and any following
+trash up to and including the last byte of the existing indent that
+we just found.  */
+output_up_to (ep);
+/* Now we go ahead and insert the new declaration at this point.
+If the definition of the given function is in the same file that we
+are currently editing, and if its full ANSI declaration normally
+would start with the keyword `extern', suppress the `extern'.  */
+{
+const char *decl = def_dec_p->definition->ansi_decl;
+if ((*decl == 'e') && (def_dec_p->file == def_dec_p->definition->file))
+	decl += 7;
+output_string (decl);
+}
+/* Finally, write out a new indent string, just like the preceding one
+that we found.  This will typically include a newline as the first
+character of the indent string.  */
+output_bytes (sp, (size_t) (ep - sp) + 1);
+}
+}
+/* Given a pointer to a file_info record, and a pointer to the beginning
+of a line (in the clean text buffer) which is assumed to contain the
+first "follower" token for the first function definition header in the
+given file, find a good place to insert some new global function
+declarations (which will replace scattered and imprecise implicit ones)
+and then insert the new explicit declaration at that point in the file.  */
+static void
+add_global_decls (const file_info *file_p, const char *clean_text_p)
+{
+const def_dec_info *dd_p;
+const char *scan_p;
+/* Setup here to recover from confusing source code detected during this
+particular "edit".  */
+save_pointers ();
+if (setjmp (source_confusion_recovery))
+{
+restore_pointers ();
+notice ("%s: global declarations for file '%s' not inserted\n",
+	      pname, shortpath (NULL, file_p->hash_entry->symbol));
+return;
+}
+/* Start by finding a good location for adding the new explicit function
+declarations.  To do this, we scan backwards, ignoring whitespace
+and comments and other junk until we find either a semicolon, or until
+we hit the beginning of the file.  */
+scan_p = find_rightmost_formals_list (clean_text_p);
+for (;; --scan_p)
+{
+if (scan_p < clean_text_base)
+	break;
+check_source (scan_p > clean_read_ptr, 0);
+if (*scan_p == ';')
+	break;
+}
+/* scan_p now points either to a semicolon, or to just before the start
+of the whole file.  */
+/* Now scan forward for the first non-whitespace character.  In theory,
+this should be the first character of the following function definition
+header.  We will put in the added declarations just prior to that.  */
+scan_p++;
+while (ISSPACE ((const unsigned char)*scan_p))
+scan_p++;
+scan_p--;
+output_up_to (scan_p);
+/* Now write out full prototypes for all of the things that had been
+implicitly declared in this file (but only those for which we were
+actually able to find unique matching definitions).  Avoid duplicates
+by marking things that we write out as we go.  */
+{
+int some_decls_added = 0;
+for (dd_p = file_p->defs_decs; dd_p; dd_p = dd_p->next_in_file)
+if (dd_p->is_implicit && dd_p->definition && !dd_p->definition->written)
+	{
+	  const char *decl = dd_p->definition->ansi_decl;
+	  /* If the function for which we are inserting a declaration is
+	     actually defined later in the same file, then suppress the
+	     leading `extern' keyword (if there is one).  */
+	  if (*decl == 'e' && (dd_p->file == dd_p->definition->file))
+	    decl += 7;
+	  output_string ("\n");
+	  output_string (decl);
+	  some_decls_added = 1;
+	  ((NONCONST def_dec_info *) dd_p->definition)->written = 1;
+	}
+if (some_decls_added)
+output_string ("\n\n");
+}
+/* Unmark all of the definitions that we just marked.  */
+for (dd_p = file_p->defs_decs; dd_p; dd_p = dd_p->next_in_file)
+if (dd_p->definition)
+((NONCONST def_dec_info *) dd_p->definition)->written = 0;
+}
+#endif /* !defined (UNPROTOIZE) */
+/* Do the editing operation specifically for a function "definition".  Note
+that editing operations for function "declarations" are handled by a
+separate routine above.  */
+static void
+edit_fn_definition (const def_dec_info *def_dec_p,
+		    const char *volatile clean_text_p)
+{
+const char *end_formals;
+const char *function_to_edit = def_dec_p->hash_entry->symbol;
+/* Setup here to recover from confusing source code detected during this
+particular "edit".  */
+save_pointers ();
+if (setjmp (source_confusion_recovery))
+{
+restore_pointers ();
+notice ("%s: definition of function '%s' not converted\n",
+	      pname, function_to_edit);
+return;
+}
+end_formals = find_rightmost_formals_list (clean_text_p);
+/* end_of_formals now points to the closing right paren of the rightmost
+formals list which is actually part of the `header' of the function
+definition that we are converting.  */
+/* If the header of this function definition looks like it declares a
+function with a variable number of arguments, and if the way it does
+that is different from that way we would like it (i.e. varargs vs.
+stdarg) then issue a warning and leave the header unconverted.  */
+if (other_variable_style_function (def_dec_p->ansi_decl))
+{
+if (!quiet_flag)
+	notice ("%s: %d: warning: definition of %s not converted\n",
+		shortpath (NULL, def_dec_p->file->hash_entry->symbol),
+		identify_lineno (end_formals),
+		other_var_style);
+output_up_to (end_formals);
+return;
+}
+if (edit_formals_lists (end_formals, def_dec_p->f_list_count, def_dec_p))
+{
+restore_pointers ();
+notice ("%s: definition of function '%s' not converted\n",
+	      pname, function_to_edit);
+return;
+}
+/* Have to output the last right paren because this never gets flushed by
+edit_formals_list.  */
+output_up_to (end_formals);
+#ifdef UNPROTOIZE
+{
+const char *decl_p;
+const char *semicolon_p;
+const char *limit_p;
+const char *scan_p;
+int had_newlines = 0;
+/* Now write out the K&R style formal declarations, one per line.  */
+decl_p = def_dec_p->formal_decls;
+limit_p = decl_p + strlen (decl_p);
+for (;decl_p < limit_p; decl_p = semicolon_p + 2)
+{
+	for (semicolon_p = decl_p; *semicolon_p != ';'; semicolon_p++)
+	  continue;
+	output_string ("\n");
+	output_string (indent_string);
+	output_bytes (decl_p, (size_t) ((semicolon_p + 1) - decl_p));
+}
+/* If there are no newlines between the end of the formals list and the
+start of the body, we should insert one now.  */
+for (scan_p = end_formals+1; *scan_p != '{'; )
+{
+	if (*scan_p == '\n')
+	  {
+	    had_newlines = 1;
+	    break;
+	  }
+	check_source (++scan_p < clean_text_limit, 0);
+}
+if (!had_newlines)
+output_string ("\n");
+}
+#else /* !defined (UNPROTOIZE) */
+/* If we are protoizing, there may be some flotsam & jetsam (like comments
+and preprocessing directives) after the old formals list but before
+the following { and we would like to preserve that stuff while effectively
+deleting the existing K&R formal parameter declarations.  We do so here
+in a rather tricky way.  Basically, we white out any stuff *except*
+the comments/pp-directives in the original text buffer, then, if there
+is anything in this area *other* than whitespace, we output it.  */
+{
+const char *end_formals_orig;
+const char *start_body;
+const char *start_body_orig;
+const char *scan;
+const char *scan_orig;
+int have_flotsam = 0;
+int have_newlines = 0;
+for (start_body = end_formals + 1; *start_body != '{';)
+check_source (++start_body < clean_text_limit, 0);
+end_formals_orig = orig_text_base + (end_formals - clean_text_base);
+start_body_orig = orig_text_base + (start_body - clean_text_base);
+scan = end_formals + 1;
+scan_orig = end_formals_orig + 1;
+for (; scan < start_body; scan++, scan_orig++)
+{
+	if (*scan == *scan_orig)
+	  {
+	    have_newlines |= (*scan_orig == '\n');
+	    /* Leave identical whitespace alone.  */
+	    if (!ISSPACE ((const unsigned char)*scan_orig))
+	      *((NONCONST char *) scan_orig) = ' '; /* identical - so whiteout */
+	  }
+	else
+	  have_flotsam = 1;
+}
+if (have_flotsam)
+output_bytes (end_formals_orig + 1,
+		    (size_t) (start_body_orig - end_formals_orig) - 1);
+else
+if (have_newlines)
+	output_string ("\n");
+else
+	output_string (" ");
+clean_read_ptr = start_body - 1;
+}
+#endif /* !defined (UNPROTOIZE) */
+}
+/* Clean up the clean text buffer.  Do this by converting comments and
+preprocessing directives into spaces.   Also convert line continuations
+into whitespace.  Also, whiteout string and character literals.  */
+static void
+do_cleaning (char *new_clean_text_base, const char *new_clean_text_limit)
+{
+char *scan_p;
+int non_whitespace_since_newline = 0;
+for (scan_p = new_clean_text_base; scan_p < new_clean_text_limit; scan_p++)
+{
+switch (*scan_p)
+	{
+	case '/':			/* Handle comments.  */
+	  if (scan_p[1] != '*')
+	    goto regular;
+	  non_whitespace_since_newline = 1;
+	  scan_p[0] = ' ';
+	  scan_p[1] = ' ';
+	  scan_p += 2;
+	  while (scan_p[1] != '/' || scan_p[0] != '*')
+	    {
+	      if (!ISSPACE ((const unsigned char)*scan_p))
+		*scan_p = ' ';
+	      ++scan_p;
+	      gcc_assert (scan_p < new_clean_text_limit);
+	    }
+	  *scan_p++ = ' ';
+	  *scan_p = ' ';
+	  break;
+	case '#':			/* Handle pp directives.  */
+	  if (non_whitespace_since_newline)
+	    goto regular;
+	  *scan_p = ' ';
+	  while (scan_p[1] != '\n' || scan_p[0] == '\\')
+	    {
+	      if (!ISSPACE ((const unsigned char)*scan_p))
+		*scan_p = ' ';
+	      ++scan_p;
+	      gcc_assert (scan_p < new_clean_text_limit);
+	    }
+	  *scan_p++ = ' ';
+	  break;
+	case '\'':			/* Handle character literals.  */
+	  non_whitespace_since_newline = 1;
+	  while (scan_p[1] != '\'' || scan_p[0] == '\\')
+	    {
+	      if (scan_p[0] == '\\'
+		  && !ISSPACE ((const unsigned char) scan_p[1]))
+		scan_p[1] = ' ';
+	      if (!ISSPACE ((const unsigned char)*scan_p))
+		*scan_p = ' ';
+	      ++scan_p;
+	      gcc_assert (scan_p < new_clean_text_limit);
+	    }
+	  *scan_p++ = ' ';
+	  break;
+	case '"':			/* Handle string literals.  */
+	  non_whitespace_since_newline = 1;
+	  while (scan_p[1] != '"' || scan_p[0] == '\\')
+	    {
+	      if (scan_p[0] == '\\'
+		  && !ISSPACE ((const unsigned char) scan_p[1]))
+		scan_p[1] = ' ';
+	      if (!ISSPACE ((const unsigned char)*scan_p))
+		*scan_p = ' ';
+	      ++scan_p;
+	      gcc_assert (scan_p < new_clean_text_limit);
+	    }
+	  if (!ISSPACE ((const unsigned char)*scan_p))
+	    *scan_p = ' ';
+	  scan_p++;
+	  break;
+	case '\\':			/* Handle line continuations.  */
+	  if (scan_p[1] != '\n')
+	    goto regular;
+	  *scan_p = ' ';
+	  break;
+	case '\n':
+	  non_whitespace_since_newline = 0;	/* Reset.  */
+	  break;
+	case ' ':
+	case '\v':
+	case '\t':
+	case '\r':
+	case '\f':
+	case '\b':
+	  break;		/* Whitespace characters.  */
+	default:
+regular:
+	  non_whitespace_since_newline = 1;
+	  break;
+	}
+}
+}
+/* Given a pointer to the closing right parenthesis for a particular formals
+list (in the clean text buffer) find the corresponding left parenthesis
+and return a pointer to it.  */
+static const char *
+careful_find_l_paren (const char *p)
+{
+const char *q;
+int paren_depth;
+for (paren_depth = 1, q = p-1; paren_depth; check_source (--q >= clean_text_base, 0))
+{
+switch (*q)
+	{
+	case ')':
+	  paren_depth++;
+	  break;
+	case '(':
+	  paren_depth--;
+	  break;
+	}
+}
+return ++q;
+}
+/* Scan the clean text buffer for cases of function definitions that we
+don't really know about because they were preprocessed out when the
+aux info files were created.
+In this version of protoize/unprotoize we just give a warning for each
+one found.  A later version may be able to at least unprotoize such
+missed items.
+Note that we may easily find all function definitions simply by
+looking for places where there is a left paren which is (ignoring
+whitespace) immediately followed by either a left-brace or by an
+upper or lower case letter.  Whenever we find this combination, we
+have also found a function definition header.
+Finding function *declarations* using syntactic clues is much harder.
+I will probably try to do this in a later version though.  */
+static void
+scan_for_missed_items (const file_info *file_p)
+{
+static const char *scan_p;
+const char *limit = clean_text_limit - 3;
+static const char *backup_limit;
+backup_limit = clean_text_base - 1;
+for (scan_p = clean_text_base; scan_p < limit; scan_p++)
+{
+if (*scan_p == ')')
+	{
+	  static const char *last_r_paren;
+	  const char *ahead_p;
+	  last_r_paren = scan_p;
+	  for (ahead_p = scan_p + 1; ISSPACE ((const unsigned char)*ahead_p); )
+	    check_source (++ahead_p < limit, limit);
+	  scan_p = ahead_p - 1;
+	  if (ISALPHA ((const unsigned char)*ahead_p) || *ahead_p == '{')
+	    {
+	      const char *last_l_paren;
+	      const int lineno = identify_lineno (ahead_p);
+	      if (setjmp (source_confusion_recovery))
+		continue;
+	      /* We know we have a function definition header.  Now skip
+	         leftwards over all of its associated formals lists.  */
+	      do
+		{
+		  last_l_paren = careful_find_l_paren (last_r_paren);
+		  for (last_r_paren = last_l_paren-1;
+		       ISSPACE ((const unsigned char)*last_r_paren); )
+		    check_source (--last_r_paren >= backup_limit, backup_limit);
+		}
+	      while (*last_r_paren == ')');
+	      if (is_id_char (*last_r_paren))
+		{
+		  const char *id_limit = last_r_paren + 1;
+		  const char *id_start;
+		  size_t id_length;
+		  const def_dec_info *dd_p;
+		  for (id_start = id_limit-1; is_id_char (*id_start); )
+		    check_source (--id_start >= backup_limit, backup_limit);
+		  id_start++;
+		  backup_limit = id_start;
+		  if ((id_length = (size_t) (id_limit - id_start)) == 0)
+		    goto not_missed;
+		  {
+		    char *func_name = alloca (id_length + 1);
+		    static const char * const stmt_keywords[]
+		      = { "if", "else", "do", "while", "for", "switch", "case", "return", 0 };
+		    const char * const *stmt_keyword;
+		    strncpy (func_name, id_start, id_length);
+		    func_name[id_length] = '\0';
+		    /* We must check here to see if we are actually looking at
+		       a statement rather than an actual function call.  */
+		    for (stmt_keyword = stmt_keywords; *stmt_keyword; stmt_keyword++)
+		      if (!strcmp (func_name, *stmt_keyword))
+			goto not_missed;
+#if 0
+		    notice ("%s: found definition of '%s' at %s(%d)\n",
+			    pname,
+			    func_name,
+			    shortpath (NULL, file_p->hash_entry->symbol),
+			    identify_lineno (id_start));
+#endif				/* 0 */
+		    /* We really should check for a match of the function name
+		       here also, but why bother.  */
+		    for (dd_p = file_p->defs_decs; dd_p; dd_p = dd_p->next_in_file)
+		      if (dd_p->is_func_def && dd_p->line == lineno)
+			goto not_missed;
+		    /* If we make it here, then we did not know about this
+		       function definition.  */
+		    notice ("%s: %d: warning: '%s' excluded by preprocessing\n",
+			    shortpath (NULL, file_p->hash_entry->symbol),
+			    identify_lineno (id_start), func_name);
+		    notice ("%s: function definition not converted\n",
+			    pname);
+		  }
+		not_missed: ;
+	        }
+	    }
+	}
+}
+}
+/* Do all editing operations for a single source file (either a "base" file
+or an "include" file).  To do this we read the file into memory, keep a
+virgin copy there, make another cleaned in-core copy of the original file
+(i.e. one in which all of the comments and preprocessing directives have
+been replaced with whitespace), then use these two in-core copies of the
+file to make a new edited in-core copy of the file.  Finally, rename the
+original file (as a way of saving it), and then write the edited version
+of the file from core to a disk file of the same name as the original.
+Note that the trick of making a copy of the original sans comments &
+preprocessing directives make the editing a whole lot easier.  */
+static void
+edit_file (const hash_table_entry *hp)
+{
+struct stat stat_buf;
+const file_info *file_p = hp->fip;
+char *new_orig_text_base;
+char *new_orig_text_limit;
+char *new_clean_text_base;
+char *new_clean_text_limit;
+size_t orig_size;
+size_t repl_size;
+int first_definition_in_file;
+/* If we are not supposed to be converting this file, or if there is
+nothing in there which needs converting, just skip this file.  */
+if (!needs_to_be_converted (file_p))
+return;
+convert_filename = file_p->hash_entry->symbol;
+/* Convert a file if it is in a directory where we want conversion
+and the file is not excluded.  */
+if (!directory_specified_p (convert_filename)
+|| file_excluded_p (convert_filename))
+{
+if (!quiet_flag
+#ifdef UNPROTOIZE
+	  /* Don't even mention "system" include files unless we are
+	     protoizing.  If we are protoizing, we mention these as a
+	     gentle way of prodding the user to convert his "system"
+	     include files to prototype format.  */
+	  && !in_system_include_dir (convert_filename)
+#endif /* defined (UNPROTOIZE) */
+	  )
+	notice ("%s: '%s' not converted\n",
+		pname, shortpath (NULL, convert_filename));
+return;
+}
+/* Let the user know what we are up to.  */
+if (nochange_flag)
+notice ("%s: would convert file '%s'\n",
+	    pname, shortpath (NULL, convert_filename));
+else
+notice ("%s: converting file '%s'\n",
+	    pname, shortpath (NULL, convert_filename));
+fflush (stderr);
+/* Find out the size (in bytes) of the original file.  */
+/* The cast avoids an erroneous warning on AIX.  */
+if (stat (convert_filename, &stat_buf) == -1)
+{
+int errno_val = errno;
+notice ("%s: can't get status for file '%s': %s\n",
+	      pname, shortpath (NULL, convert_filename),
+	      xstrerror (errno_val));
+return;
+}
+orig_size = stat_buf.st_size;
+/* Allocate a buffer to hold the original text.  */
+orig_text_base = new_orig_text_base = xmalloc (orig_size + 2);
+orig_text_limit = new_orig_text_limit = new_orig_text_base + orig_size;
+/* Allocate a buffer to hold the cleaned-up version of the original text.  */
+clean_text_base = new_clean_text_base = xmalloc (orig_size + 2);
+clean_text_limit = new_clean_text_limit = new_clean_text_base + orig_size;
+clean_read_ptr = clean_text_base - 1;
+/* Allocate a buffer that will hopefully be large enough to hold the entire
+converted output text.  As an initial guess for the maximum size of the
+output buffer, use 125% of the size of the original + some extra.  This
+buffer can be expanded later as needed.  */
+repl_size = orig_size + (orig_size >> 2) + 4096;
+repl_text_base = xmalloc (repl_size + 2);
+repl_text_limit = repl_text_base + repl_size - 1;
+repl_write_ptr = repl_text_base - 1;
+{
+int input_file;
+int fd_flags;
+/* Open the file to be converted in READ ONLY mode.  */
+fd_flags = O_RDONLY;
+#ifdef O_BINARY
+/* Use binary mode to avoid having to deal with different EOL characters.  */
+fd_flags |= O_BINARY;
+#endif
+if ((input_file = open (convert_filename, fd_flags, 0444)) == -1)
+{
+	int errno_val = errno;
+	notice ("%s: can't open file '%s' for reading: %s\n",
+		pname, shortpath (NULL, convert_filename),
+		xstrerror (errno_val));
+	return;
+}
+/* Read the entire original source text file into the original text buffer
+in one swell fwoop.  Then figure out where the end of the text is and
+make sure that it ends with a newline followed by a null.  */
+if (safe_read (input_file, new_orig_text_base, orig_size) !=
+	(int) orig_size)
+{
+	int errno_val = errno;
+	close (input_file);
+	notice ("\n%s: error reading input file '%s': %s\n",
+		pname, shortpath (NULL, convert_filename),
+		xstrerror (errno_val));
+	return;
+}
+close (input_file);
+}
+if (orig_size == 0 || orig_text_limit[-1] != '\n')
+{
+*new_orig_text_limit++ = '\n';
+orig_text_limit++;
+}
+/* Create the cleaned up copy of the original text.  */
+memcpy (new_clean_text_base, orig_text_base,
+	  (size_t) (orig_text_limit - orig_text_base));
+do_cleaning (new_clean_text_base, new_clean_text_limit);
+#if 0
+{
+int clean_file;
+size_t clean_size = orig_text_limit - orig_text_base;
+char *const clean_filename = alloca (strlen (convert_filename) + 6 + 1);
+/* Open (and create) the clean file.  */
+strcpy (clean_filename, convert_filename);
+strcat (clean_filename, ".clean");
+if ((clean_file = creat (clean_filename, 0666)) == -1)
+{
+	int errno_val = errno;
+	notice ("%s: can't create/open clean file '%s': %s\n",
+		pname, shortpath (NULL, clean_filename),
+		xstrerror (errno_val));
+	return;
+}
+/* Write the clean file.  */
+safe_write (clean_file, new_clean_text_base, clean_size, clean_filename);
+close (clean_file);
+}
+#endif /* 0 */
+/* Do a simplified scan of the input looking for things that were not
+mentioned in the aux info files because of the fact that they were
+in a region of the source which was preprocessed-out (via #if or
+via #ifdef).  */
+scan_for_missed_items (file_p);
+/* Setup to do line-oriented forward seeking in the clean text buffer.  */
+last_known_line_number = 1;
+last_known_line_start = clean_text_base;
+/* Now get down to business and make all of the necessary edits.  */
+{
+const def_dec_info *def_dec_p;
+first_definition_in_file = 1;
+def_dec_p = file_p->defs_decs;
+for (; def_dec_p; def_dec_p = def_dec_p->next_in_file)
+{
+	const char *clean_text_p = seek_to_line (def_dec_p->line);
+	/* clean_text_p now points to the first character of the line which
+	   contains the `terminator' for the declaration or definition that
+	   we are about to process.  */
+#ifndef UNPROTOIZE
+	if (global_flag && def_dec_p->is_func_def && first_definition_in_file)
+	  {
+	    add_global_decls (def_dec_p->file, clean_text_p);
+	    first_definition_in_file = 0;
+	  }
+	/* Don't edit this item if it is already in prototype format or if it
+	   is a function declaration and we have found no corresponding
+	   definition.  */
+	if (def_dec_p->prototyped
+	    || (!def_dec_p->is_func_def && !def_dec_p->definition))
+	  continue;
+#endif /* !defined (UNPROTOIZE) */
+	if (def_dec_p->is_func_def)
+	  edit_fn_definition (def_dec_p, clean_text_p);
+	else
+#ifndef UNPROTOIZE
+	if (def_dec_p->is_implicit)
+	  add_local_decl (def_dec_p, clean_text_p);
+	else
+#endif /* !defined (UNPROTOIZE) */
+	  edit_fn_declaration (def_dec_p, clean_text_p);
+}
+}
+/* Finalize things.  Output the last trailing part of the original text.  */
+output_up_to (clean_text_limit - 1);
+/* If this is just a test run, stop now and just deallocate the buffers.  */
+if (nochange_flag)
+{
+free (new_orig_text_base);
+free (new_clean_text_base);
+free (repl_text_base);
+return;
+}
+/* Change the name of the original input file.  This is just a quick way of
+saving the original file.  */
+if (!nosave_flag)
+{
+char *new_filename
+	= xmalloc (strlen (convert_filename) + strlen (save_suffix) + 2);
+strcpy (new_filename, convert_filename);
+#ifdef __MSDOS__
+/* MSDOS filenames are restricted to 8.3 format, so we save `foo.c'
+	 as `foo.<save_suffix>'.  */
+new_filename[(strlen (convert_filename) - 1] = '\0';
+#endif
+strcat (new_filename, save_suffix);
+/* Don't overwrite existing file.  */
+if (access (new_filename, F_OK) == 0)
+	{
+	  if (!quiet_flag)
+	    notice ("%s: warning: file '%s' already saved in '%s'\n",
+		    pname,
+		    shortpath (NULL, convert_filename),
+		    shortpath (NULL, new_filename));
+	}
+else if (rename (convert_filename, new_filename) == -1)
+	{
+	  int errno_val = errno;
+	  notice ("%s: can't link file '%s' to '%s': %s\n",
+		  pname,
+		  shortpath (NULL, convert_filename),
+		  shortpath (NULL, new_filename),
+		  xstrerror (errno_val));
+	  return;
+	}
+}
+if (unlink (convert_filename) == -1)
+{
+int errno_val = errno;
+/* The file may have already been renamed.  */
+if (errno_val != ENOENT)
+	{
+	  notice ("%s: can't delete file '%s': %s\n",
+		  pname, shortpath (NULL, convert_filename),
+		  xstrerror (errno_val));
+	  return;
+	}
+}
+{
+int output_file;
+/* Open (and create) the output file.  */
+if ((output_file = creat (convert_filename, 0666)) == -1)
+{
+	int errno_val = errno;
+	notice ("%s: can't create/open output file '%s': %s\n",
+		pname, shortpath (NULL, convert_filename),
+		xstrerror (errno_val));
+	return;
+}
+#ifdef O_BINARY
+/* Use binary mode to avoid changing the existing EOL character.  */
+setmode (output_file, O_BINARY);
+#endif
+/* Write the output file.  */
+{
+unsigned int out_size = (repl_write_ptr + 1) - repl_text_base;
+safe_write (output_file, repl_text_base, out_size, convert_filename);
+}
+close (output_file);
+}
+/* Deallocate the conversion buffers.  */
+free (new_orig_text_base);
+free (new_clean_text_base);
+free (repl_text_base);
+/* Change the mode of the output file to match the original file.  */
+/* The cast avoids an erroneous warning on AIX.  */
+if (chmod (convert_filename, stat_buf.st_mode) == -1)
+{
+int errno_val = errno;
+notice ("%s: can't change mode of file '%s': %s\n",
+	      pname, shortpath (NULL, convert_filename),
+	      xstrerror (errno_val));
+}
+/* Note:  We would try to change the owner and group of the output file
+to match those of the input file here, except that may not be a good
+thing to do because it might be misleading.  Also, it might not even
+be possible to do that (on BSD systems with quotas for instance).  */
+}
+/* Do all of the individual steps needed to do the protoization (or
+unprotoization) of the files referenced in the aux_info files given
+in the command line.  */
+static void
+do_processing (void)
+{
+const char * const *base_pp;
+const char * const * const end_pps
+= &base_source_filenames[n_base_source_files];
+#ifndef UNPROTOIZE
+int syscalls_len;
+#endif /* !defined (UNPROTOIZE) */
+/* One-by-one, check (and create if necessary), open, and read all of the
+stuff in each aux_info file.  After reading each aux_info file, the
+aux_info_file just read will be automatically deleted unless the
+keep_flag is set.  */
+for (base_pp = base_source_filenames; base_pp < end_pps; base_pp++)
+process_aux_info_file (*base_pp, keep_flag, 0);
+#ifndef UNPROTOIZE
+/* Also open and read the special SYSCALLS.c aux_info file which gives us
+the prototypes for all of the standard system-supplied functions.  */
+if (nondefault_syscalls_dir)
+{
+syscalls_absolute_filename
+	= xmalloc (strlen (nondefault_syscalls_dir) + 1
+		   + sizeof (syscalls_filename));
+strcpy (syscalls_absolute_filename, nondefault_syscalls_dir);
+}
+else
+{
+GET_ENVIRONMENT (default_syscalls_dir, "GCC_EXEC_PREFIX");
+if (!default_syscalls_dir)
+	{
+	  default_syscalls_dir = standard_exec_prefix;
+	}
+syscalls_absolute_filename
+	= xmalloc (strlen (default_syscalls_dir) + 0
+		   + strlen (target_machine) + 1
+		   + strlen (target_version) + 1
+		   + sizeof (syscalls_filename));
+strcpy (syscalls_absolute_filename, default_syscalls_dir);
+strcat (syscalls_absolute_filename, target_machine);
+strcat (syscalls_absolute_filename, "/");
+strcat (syscalls_absolute_filename, target_version);
+strcat (syscalls_absolute_filename, "/");
+}
+syscalls_len = strlen (syscalls_absolute_filename);
+if (! IS_DIR_SEPARATOR (*(syscalls_absolute_filename + syscalls_len - 1)))
+{
+*(syscalls_absolute_filename + syscalls_len++) = DIR_SEPARATOR;
+*(syscalls_absolute_filename + syscalls_len) = '\0';
+}
+strcat (syscalls_absolute_filename, syscalls_filename);
+/* Call process_aux_info_file in such a way that it does not try to
+delete the SYSCALLS aux_info file.  */
+process_aux_info_file (syscalls_absolute_filename, 1, 1);
+#endif /* !defined (UNPROTOIZE) */
+/* When we first read in all of the information from the aux_info files
+we saved in it descending line number order, because that was likely to
+be faster.  Now however, we want the chains of def & dec records to
+appear in ascending line number order as we get further away from the
+file_info record that they hang from.  The following line causes all of
+these lists to be rearranged into ascending line number order.  */
+visit_each_hash_node (filename_primary, reverse_def_dec_list);
+#ifndef UNPROTOIZE
+/* Now do the "real" work.  The following line causes each declaration record
+to be "visited".  For each of these nodes, an attempt is made to match
+up the function declaration with a corresponding function definition,
+which should have a full prototype-format formals list with it.  Once
+these match-ups are made, the conversion of the function declarations
+to prototype format can be made.  */
+visit_each_hash_node (function_name_primary, connect_defs_and_decs);
+#endif /* !defined (UNPROTOIZE) */
+/* Now convert each file that can be converted (and needs to be).  */
+visit_each_hash_node (filename_primary, edit_file);
+#ifndef UNPROTOIZE
+/* If we are working in cplusplus mode, try to rename all .c files to .C
+files.  Don't panic if some of the renames don't work.  */
+if (cplusplus_flag && !nochange_flag)
+visit_each_hash_node (filename_primary, rename_c_file);
+#endif /* !defined (UNPROTOIZE) */
+}
+static const struct option longopts[] =
+{
+{"version", 0, 0, 'V'},
+{"file_name", 0, 0, 'p'},
+{"quiet", 0, 0, 'q'},
+{"silent", 0, 0, 'q'},
+{"force", 0, 0, 'f'},
+{"keep", 0, 0, 'k'},
+{"nosave", 0, 0, 'N'},
+{"nochange", 0, 0, 'n'},
+{"compiler-options", 1, 0, 'c'},
+{"exclude", 1, 0, 'x'},
+{"directory", 1, 0, 'd'},
+#ifdef UNPROTOIZE
+{"indent", 1, 0, 'i'},
+#else
+{"local", 0, 0, 'l'},
+{"global", 0, 0, 'g'},
+{"c++", 0, 0, 'C'},
+{"syscalls-dir", 1, 0, 'B'},
+#endif
+{0, 0, 0, 0}
+};
+extern int main (int, char **const);
+int
+main (int argc, char **const argv)
+{
+int longind;
+int c;
+const char *params = "";
+pname = strrchr (argv[0], DIR_SEPARATOR);
+#ifdef DIR_SEPARATOR_2
+{
+char *slash;
+slash = strrchr (pname ? pname : argv[0], DIR_SEPARATOR_2);
+if (slash)
+pname = slash;
+}
+#endif
+pname = pname ? pname+1 : argv[0];
+#ifdef SIGCHLD
+/* We *MUST* set SIGCHLD to SIG_DFL so that the wait4() call will
+receive the signal.  A different setting is inheritable */
+signal (SIGCHLD, SIG_DFL);
+#endif
+/* Unlock the stdio streams.  */
+unlock_std_streams ();
+gcc_init_libintl ();
+cwd_buffer = getpwd ();
+if (!cwd_buffer)
+{
+notice ("%s: cannot get working directory: %s\n",
+	      pname, xstrerror(errno));
+return (FATAL_EXIT_CODE);
+}
+/* By default, convert the files in the current directory.  */
+directory_list = string_list_cons (cwd_buffer, NULL);
+while ((c = getopt_long (argc, argv,
+#ifdef UNPROTOIZE
+			   "c:d:i:knNp:qvVx:",
+#else
+			   "B:c:Cd:gklnNp:qvVx:",
+#endif
+			   longopts, &longind)) != EOF)
+{
+if (c == 0)		/* Long option.  */
+	c = longopts[longind].val;
+switch (c)
+	{
+	case 'p':
+	  compiler_file_name = optarg;
+	  break;
+	case 'd':
+	  directory_list
+	    = string_list_cons (abspath (NULL, optarg), directory_list);
+	  break;
+	case 'x':
+	  exclude_list = string_list_cons (optarg, exclude_list);
+	  break;
+	case 'v':
+	case 'V':
+	  version_flag = 1;
+	  break;
+	case 'q':
+	  quiet_flag = 1;
+	  break;
+#if 0
+	case 'f':
+	  force_flag = 1;
+	  break;
+#endif
+	case 'n':
+	  nochange_flag = 1;
+	  keep_flag = 1;
+	  break;
+	case 'N':
+	  nosave_flag = 1;
+	  break;
+	case 'k':
+	  keep_flag = 1;
+	  break;
+	case 'c':
+	  params = optarg;
+	  break;
+#ifdef UNPROTOIZE
+	case 'i':
+	  indent_string = optarg;
+	  break;
+#else				/* !defined (UNPROTOIZE) */
+	case 'l':
+	  local_flag = 1;
+	  break;
+	case 'g':
+	  global_flag = 1;
+	  break;
+	case 'C':
+	  cplusplus_flag = 1;
+	  break;
+	case 'B':
+	  nondefault_syscalls_dir = optarg;
+	  break;
+#endif				/* !defined (UNPROTOIZE) */
+	default:
+	  usage ();
+	}
+}
+/* Set up compile_params based on -p and -c options.  */
+munge_compile_params (params);
+n_base_source_files = argc - optind;
+/* Now actually make a list of the base source filenames.  */
+base_source_filenames
+= xmalloc ((n_base_source_files + 1) * sizeof (char *));
+n_base_source_files = 0;
+for (; optind < argc; optind++)
+{
+const char *path = abspath (NULL, argv[optind]);
+int len = strlen (path);
+if (path[len-1] == 'c' && path[len-2] == '.')
+	base_source_filenames[n_base_source_files++] = path;
+else
+	{
+	  notice ("%s: input file names must have .c suffixes: %s\n",
+		  pname, shortpath (NULL, path));
+	  errors++;
+	}
+}
+#ifndef UNPROTOIZE
+/* We are only interested in the very first identifier token in the
+definition of `va_list', so if there is more junk after that first
+identifier token, delete it from the `varargs_style_indicator'.  */
+{
+const char *cp;
+for (cp = varargs_style_indicator; ISIDNUM (*cp); cp++)
+continue;
+if (*cp != 0)
+varargs_style_indicator = savestring (varargs_style_indicator,
+					    cp - varargs_style_indicator);
+}
+#endif /* !defined (UNPROTOIZE) */
+if (errors)
+usage ();
+else
+{
+if (version_flag)
+	fprintf (stderr, "%s %s%s\n", pname, pkgversion_string,
+		 version_string);
+do_processing ();
+}
+return (errors ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE);
+}

Mercurial > hg > CbC > CbC_gcc

comparison gcc/protoize.c @ 0:a06113de4d67