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/* 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 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 itme 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\n", pname, version_string); do_processing (); } return (errors ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE); }
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