Mercurial > hg > CbC > CbC_gcc
diff gcc/fix-header.c @ 0:a06113de4d67
first commit
| author | kent <kent@cr.ie.u-ryukyu.ac.jp> |
|---|---|
| date | Fri, 17 Jul 2009 14:47:48 +0900 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/gcc/fix-header.c Fri Jul 17 14:47:48 2009 +0900 @@ -0,0 +1,1314 @@ +/* fix-header.c - Make C header file suitable for C++. + Copyright (C) 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, + 2002, 2003, 2004, 2006, 2007, 2008 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by the + Free Software Foundation; either version 3, or (at your option) any + later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING3. If not see + <http://www.gnu.org/licenses/>. */ + +/* This program massages a system include file (such as stdio.h), + into a form that is compatible with GNU C and GNU C++. + + * extern "C" { ... } braces are added (inside #ifndef __cplusplus), + if they seem to be needed. These prevent C++ compilers from name + mangling the functions inside the braces. + + * If an old-style incomplete function declaration is seen (without + an argument list), and it is a "standard" function listed in + the file sys-protos.h (and with a non-empty argument list), then + the declaration is converted to a complete prototype by replacing + the empty parameter list with the argument list from sys-protos.h. + + * The program can be given a list of (names of) required standard + functions (such as fclose for stdio.h). If a required function + is not seen in the input, then a prototype for it will be + written to the output. + + * If all of the non-comment code of the original file is protected + against multiple inclusion: + #ifndef FOO + #define FOO + <body of include file> + #endif + then extra matter added to the include file is placed inside the <body>. + + * If the input file is OK (nothing needs to be done); + the output file is not written (nor removed if it exists). + + There are also some special actions that are done for certain + well-known standard include files: + + * If argv[1] is "sys/stat.h", the Posix.1 macros + S_ISBLK, S_ISCHR, S_ISDIR, S_ISFIFO, S_ISLNK, S_ISREG are added if + they were missing, and the corresponding "traditional" S_IFxxx + macros were defined. + + * If argv[1] is "errno.h", errno is declared if it was missing. + + * TODO: The input file should be read complete into memory, because: + a) it needs to be scanned twice anyway, and + b) it would be nice to allow update in place. + + Usage: + fix-header FOO.H INFILE.H OUTFILE.H [OPTIONS] + where: + * FOO.H is the relative file name of the include file, + as it would be #include'd by a C file. (E.g. stdio.h) + * INFILE.H is a full pathname for the input file (e.g. /usr/include/stdio.h) + * OUTFILE.H is the full pathname for where to write the output file, + if anything needs to be done. (e.g. ./include/stdio.h) + * OPTIONS can be -D or -I switches as you would pass to cpp. + + Written by Per Bothner <bothner@cygnus.com>, July 1993. */ + +#include "bconfig.h" +#include "system.h" +#include "coretypes.h" +#include "tm.h" +#include "obstack.h" +#include "scan.h" +#include "cpplib.h" +#include "incpath.h" +#include "errors.h" + +#ifdef TARGET_EXTRA_INCLUDES +void +TARGET_EXTRA_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED, + const char *iprefix ATTRIBUTE_UNUSED, + int stdinc ATTRIBUTE_UNUSED) +{ +} +#endif + +#ifdef TARGET_EXTRA_PRE_INCLUDES +void +TARGET_EXTRA_PRE_INCLUDES (const char *sysroot ATTRIBUTE_UNUSED, + const char *iprefix ATTRIBUTE_UNUSED, + int stdinc ATTRIBUTE_UNUSED) +{ +} +#endif + +struct line_maps line_table; + +sstring buf; + +int verbose = 0; +int partial_count = 0; +int warnings = 0; + +#if ADD_MISSING_EXTERN_C +int missing_extern_C_count = 0; +#endif + +#include "xsys-protos.h" + +#ifdef FIXPROTO_IGNORE_LIST +/* This is a currently unused feature. */ + +/* List of files and directories to ignore. + A directory name (ending in '/') means ignore anything in that + directory. (It might be more efficient to do directory pruning + earlier in fixproto, but this is simpler and easier to customize.) */ + +static const char *const files_to_ignore[] = { + "X11/", + FIXPROTO_IGNORE_LIST + 0 +}; +#endif + +char *inf_buffer; +char *inf_limit; +char *inf_ptr; +static const char *cur_file; + +/* Certain standard files get extra treatment */ + +enum special_file +{ + no_special, +#ifdef errno_h +#undef errno_h +#endif + errno_h, +#ifdef stdio_h +#undef stdio_h +#endif + stdio_h, +#ifdef stdlib_h +#undef stdlib_h +#endif + stdlib_h, +#ifdef sys_stat_h +#undef sys_stat_h +#endif + sys_stat_h +}; + +/* A NAMELIST is a sequence of names, separated by '\0', and terminated + by an empty name (i.e. by "\0\0"). */ + +typedef const char *namelist; + +/* The following macros provide the bits for symbol_flags. */ +typedef int symbol_flags; + +/* Used to mark names defined in the ANSI/ISO C standard. */ +#define ANSI_SYMBOL 1 + +/* We no longer massage include files for POSIX or XOPEN symbols, + as there are now several versions of the POSIX and XOPEN standards, + and it would be a maintenance nightmare for us to track them all. + Better to be compatible with the system include files. */ +/*#define ADD_MISSING_POSIX 1 */ +/*#define ADD_MISSING_XOPEN 1 */ + +#if ADD_MISSING_POSIX +/* Used to mark names defined in the Posix.1 or Posix.2 standard. */ +#define POSIX1_SYMBOL 2 +#define POSIX2_SYMBOL 4 +#else +#define POSIX1_SYMBOL 0 +#define POSIX2_SYMBOL 0 +#endif + +#if ADD_MISSING_XOPEN +/* Used to mark names defined in X/Open Portability Guide. */ +#define XOPEN_SYMBOL 8 +/* Used to mark names defined in X/Open UNIX Extensions. */ +#define XOPEN_EXTENDED_SYMBOL 16 +#else +#define XOPEN_SYMBOL 0 +#define XOPEN_EXTENDED_SYMBOL 0 +#endif + +/* Used to indicate names that are not functions */ +#define MACRO_SYMBOL 512 + +struct symbol_list { + symbol_flags flags; + namelist names; +}; + +#define SYMBOL_TABLE_SIZE 10 +struct symbol_list symbol_table[SYMBOL_TABLE_SIZE]; +int cur_symbol_table_size; + +static void add_symbols (symbol_flags, namelist); +static struct fn_decl *lookup_std_proto (const char *, int); +static void write_lbrac (void); +static void recognized_macro (const char *); +static void check_macro_names (cpp_reader *, namelist); +static void read_scan_file (char *, int, char **); +static void write_rbrac (void); +static int inf_skip_spaces (int); +static int inf_read_upto (sstring *, int); +static int inf_scan_ident (sstring *, int); +static int check_protection (int *, int *); +static void cb_file_change (cpp_reader *, const struct line_map *); + +static void +add_symbols (symbol_flags flags, namelist names) +{ + symbol_table[cur_symbol_table_size].flags = flags; + symbol_table[cur_symbol_table_size].names = names; + cur_symbol_table_size++; + if (cur_symbol_table_size >= SYMBOL_TABLE_SIZE) + fatal ("too many calls to add_symbols"); + symbol_table[cur_symbol_table_size].names = NULL; /* Termination. */ +} + +struct std_include_entry { + const char *const name; + const symbol_flags flags; + const namelist names; +}; + +const char NONE[] = ""; /* The empty namelist. */ + +/* Special name to indicate a continuation line in std_include_table. */ +const char CONTINUED[] = ""; + +const struct std_include_entry *include_entry; + +const struct std_include_entry std_include_table [] = { + { "ctype.h", ANSI_SYMBOL, + "isalnum\0isalpha\0iscntrl\0isdigit\0isgraph\0islower\0\ +isprint\0ispunct\0isspace\0isupper\0isxdigit\0tolower\0toupper\0" }, + + { "dirent.h", POSIX1_SYMBOL, "closedir\0opendir\0readdir\0rewinddir\0"}, + + { "errno.h", ANSI_SYMBOL|MACRO_SYMBOL, "errno\0" }, + + /* ANSI_SYMBOL is wrong, but ... */ + { "curses.h", ANSI_SYMBOL, "box\0delwin\0endwin\0getcurx\0getcury\0initscr\0\ +mvcur\0mvwprintw\0mvwscanw\0newwin\0overlay\0overwrite\0\ +scroll\0subwin\0touchwin\0waddstr\0wclear\0wclrtobot\0wclrtoeol\0\ +waddch\0wdelch\0wdeleteln\0werase\0wgetch\0wgetstr\0winsch\0winsertln\0\ +wmove\0wprintw\0wrefresh\0wscanw\0wstandend\0wstandout\0" }, + + { "fcntl.h", POSIX1_SYMBOL, "creat\0fcntl\0open\0" }, + + /* Maybe also "getgrent fgetgrent setgrent endgrent" */ + { "grp.h", POSIX1_SYMBOL, "getgrgid\0getgrnam\0" }, + +/*{ "limit.h", ... provided by gcc }, */ + + { "locale.h", ANSI_SYMBOL, "localeconv\0setlocale\0" }, + + { "math.h", ANSI_SYMBOL, + "acos\0asin\0atan\0atan2\0ceil\0cos\0cosh\0exp\0\ +fabs\0floor\0fmod\0frexp\0ldexp\0log10\0log\0modf\0pow\0sin\0sinh\0sqrt\0\ +tan\0tanh\0" }, + + { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "HUGE_VAL\0" }, + + { "pwd.h", POSIX1_SYMBOL, "getpwnam\0getpwuid\0" }, + + /* Left out siglongjmp sigsetjmp - these depend on sigjmp_buf. */ + { "setjmp.h", ANSI_SYMBOL, "longjmp\0setjmp\0" }, + + /* Left out signal() - its prototype is too complex for us! + Also left out "sigaction sigaddset sigdelset sigemptyset + sigfillset sigismember sigpending sigprocmask sigsuspend" + because these need sigset_t or struct sigaction. + Most systems that provide them will also declare them. */ + { "signal.h", ANSI_SYMBOL, "raise\0" }, + { CONTINUED, POSIX1_SYMBOL, "kill\0" }, + + { "stdio.h", ANSI_SYMBOL, + "clearerr\0fclose\0feof\0ferror\0fflush\0fgetc\0fgetpos\0\ +fgets\0fopen\0fprintf\0fputc\0fputs\0fread\0freopen\0fscanf\0fseek\0\ +fsetpos\0ftell\0fwrite\0getc\0getchar\0gets\0perror\0\ +printf\0putc\0putchar\0puts\0remove\0rename\0rewind\0scanf\0setbuf\0\ +setvbuf\0sprintf\0sscanf\0vprintf\0vsprintf\0vfprintf\0tmpfile\0\ +tmpnam\0ungetc\0" }, + { CONTINUED, POSIX1_SYMBOL, "fdopen\0fileno\0" }, + { CONTINUED, POSIX2_SYMBOL, "pclose\0popen\0" }, /* I think ... */ +/* Should perhaps also handle NULL, EOF, ... ? */ + + /* "div ldiv", - ignored because these depend on div_t, ldiv_t + ignore these: "mblen mbstowcs mbstowc wcstombs wctomb" + Left out getgroups, because SunOS4 has incompatible BSD and SVR4 versions. + Should perhaps also add NULL */ + { "stdlib.h", ANSI_SYMBOL, + "abort\0abs\0atexit\0atof\0atoi\0atol\0bsearch\0calloc\0\ +exit\0free\0getenv\0labs\0malloc\0qsort\0rand\0realloc\0\ +srand\0strtod\0strtol\0strtoul\0system\0" }, + { CONTINUED, ANSI_SYMBOL|MACRO_SYMBOL, "EXIT_FAILURE\0EXIT_SUCCESS\0" }, + { CONTINUED, POSIX1_SYMBOL, "putenv\0" }, + + { "string.h", ANSI_SYMBOL, "memchr\0memcmp\0memcpy\0memmove\0memset\0\ +strcat\0strchr\0strcmp\0strcoll\0strcpy\0strcspn\0strerror\0\ +strlen\0strncat\0strncmp\0strncpy\0strpbrk\0strrchr\0strspn\0strstr\0\ +strtok\0strxfrm\0" }, +/* Should perhaps also add NULL and size_t */ + + { "strings.h", XOPEN_EXTENDED_SYMBOL, + "bcmp\0bcopy\0bzero\0ffs\0index\0rindex\0strcasecmp\0strncasecmp\0" }, + + { "strops.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" }, + + /* Actually, XPG4 does not seem to have <sys/ioctl.h>, but defines + ioctl in <strops.h>. However, many systems have it is sys/ioctl.h, + and many systems do have <sys/ioctl.h> but not <strops.h>. */ + { "sys/ioctl.h", XOPEN_EXTENDED_SYMBOL, "ioctl\0" }, + + { "sys/socket.h", XOPEN_EXTENDED_SYMBOL, "socket\0" }, + + { "sys/stat.h", POSIX1_SYMBOL, + "chmod\0fstat\0mkdir\0mkfifo\0stat\0lstat\0umask\0" }, + { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL, + "S_ISDIR\0S_ISBLK\0S_ISCHR\0S_ISFIFO\0S_ISREG\0S_ISLNK\0S_IFDIR\0\ +S_IFBLK\0S_IFCHR\0S_IFIFO\0S_IFREG\0S_IFLNK\0" }, + { CONTINUED, XOPEN_EXTENDED_SYMBOL, "fchmod\0" }, + +#if 0 +/* How do we handle fd_set? */ + { "sys/time.h", XOPEN_EXTENDED_SYMBOL, "select\0" }, + { "sys/select.h", XOPEN_EXTENDED_SYMBOL /* fake */, "select\0" }, +#endif + + { "sys/times.h", POSIX1_SYMBOL, "times\0" }, + /* "sys/types.h" add types (not in old g++-include) */ + + { "sys/utsname.h", POSIX1_SYMBOL, "uname\0" }, + + { "sys/wait.h", POSIX1_SYMBOL, "wait\0waitpid\0" }, + { CONTINUED, POSIX1_SYMBOL|MACRO_SYMBOL, + "WEXITSTATUS\0WIFEXITED\0WIFSIGNALED\0WIFSTOPPED\0WSTOPSIG\0\ +WTERMSIG\0WNOHANG\0WNOTRACED\0" }, + + { "tar.h", POSIX1_SYMBOL, NONE }, + + { "termios.h", POSIX1_SYMBOL, + "cfgetispeed\0cfgetospeed\0cfsetispeed\0cfsetospeed\0tcdrain\0tcflow\0tcflush\0tcgetattr\0tcsendbreak\0tcsetattr\0" }, + + { "time.h", ANSI_SYMBOL, + "asctime\0clock\0ctime\0difftime\0gmtime\0localtime\0mktime\0strftime\0time\0" }, + { CONTINUED, POSIX1_SYMBOL, "tzset\0" }, + + { "unistd.h", POSIX1_SYMBOL, + "_exit\0access\0alarm\0chdir\0chown\0close\0ctermid\0cuserid\0\ +dup\0dup2\0execl\0execle\0execlp\0execv\0execve\0execvp\0fork\0fpathconf\0\ +getcwd\0getegid\0geteuid\0getgid\0getlogin\0getpgrp\0getpid\0\ +getppid\0getuid\0isatty\0link\0lseek\0pathconf\0pause\0pipe\0read\0rmdir\0\ +setgid\0setpgid\0setsid\0setuid\0sleep\0sysconf\0tcgetpgrp\0tcsetpgrp\0\ +ttyname\0unlink\0write\0" }, + { CONTINUED, POSIX2_SYMBOL, "getopt\0" }, + { CONTINUED, XOPEN_EXTENDED_SYMBOL, + "lockf\0gethostid\0gethostname\0readlink\0symlink\0" }, + + { "utime.h", POSIX1_SYMBOL, "utime\0" }, + + { NULL, 0, NONE } +}; + +enum special_file special_file_handling = no_special; + +/* They are set if the corresponding macro has been seen. */ +/* The following are only used when handling sys/stat.h */ +int seen_S_IFBLK = 0, seen_S_ISBLK = 0; +int seen_S_IFCHR = 0, seen_S_ISCHR = 0; +int seen_S_IFDIR = 0, seen_S_ISDIR = 0; +int seen_S_IFIFO = 0, seen_S_ISFIFO = 0; +int seen_S_IFLNK = 0, seen_S_ISLNK = 0; +int seen_S_IFREG = 0, seen_S_ISREG = 0; +/* The following are only used when handling errno.h */ +int seen_errno = 0; +/* The following are only used when handling stdlib.h */ +int seen_EXIT_FAILURE = 0, seen_EXIT_SUCCESS = 0; + +struct obstack scan_file_obstack; + +/* NOTE: If you edit this, also edit gen-protos.c !! */ + +static struct fn_decl * +lookup_std_proto (const char *name, int name_length) +{ + int i = hashstr (name, name_length) % HASH_SIZE; + int i0 = i; + for (;;) + { + struct fn_decl *fn; + if (hash_tab[i] == 0) + return NULL; + fn = &std_protos[hash_tab[i]]; + if ((int) strlen (fn->fname) == name_length + && strncmp (fn->fname, name, name_length) == 0) + return fn; + i = (i+1) % HASH_SIZE; + gcc_assert (i != i0); + } +} + +char *inc_filename; +int inc_filename_length; +FILE *outf; +sstring line; + +int lbrac_line, rbrac_line; + +int required_unseen_count = 0; +int required_other = 0; + +static void +write_lbrac (void) +{ + if (partial_count) + { + fprintf (outf, "#ifndef _PARAMS\n"); + fprintf (outf, "#if defined(__STDC__) || defined(__cplusplus)\n"); + fprintf (outf, "#define _PARAMS(ARGS) ARGS\n"); + fprintf (outf, "#else\n"); + fprintf (outf, "#define _PARAMS(ARGS) ()\n"); + fprintf (outf, "#endif\n#endif /* _PARAMS */\n"); + } +} + +struct partial_proto +{ + struct partial_proto *next; + struct fn_decl *fn; + int line_seen; +}; + +struct partial_proto *partial_proto_list = NULL; + +struct partial_proto required_dummy_proto, seen_dummy_proto; +#define REQUIRED(FN) ((FN)->partial == &required_dummy_proto) +#define SET_REQUIRED(FN) ((FN)->partial = &required_dummy_proto) +#define SET_SEEN(FN) ((FN)->partial = &seen_dummy_proto) +#define SEEN(FN) ((FN)->partial == &seen_dummy_proto) + +static void +recognized_macro (const char *fname) +{ + /* The original include file defines fname as a macro. */ + struct fn_decl *fn = lookup_std_proto (fname, strlen (fname)); + + /* Since fname is a macro, don't require a prototype for it. */ + if (fn) + { + if (REQUIRED (fn)) + required_unseen_count--; + SET_SEEN (fn); + } + + switch (special_file_handling) + { + case errno_h: + if (strcmp (fname, "errno") == 0 && !seen_errno) + seen_errno = 1, required_other--; + break; + case stdlib_h: + if (strcmp (fname, "EXIT_FAILURE") == 0 && !seen_EXIT_FAILURE) + seen_EXIT_FAILURE = 1, required_other--; + if (strcmp (fname, "EXIT_SUCCESS") == 0 && !seen_EXIT_SUCCESS) + seen_EXIT_SUCCESS = 1, required_other--; + break; + case sys_stat_h: + if (fname[0] == 'S' && fname[1] == '_') + { + if (strcmp (fname, "S_IFBLK") == 0) seen_S_IFBLK++; + else if (strcmp (fname, "S_ISBLK") == 0) seen_S_ISBLK++; + else if (strcmp (fname, "S_IFCHR") == 0) seen_S_IFCHR++; + else if (strcmp (fname, "S_ISCHR") == 0) seen_S_ISCHR++; + else if (strcmp (fname, "S_IFDIR") == 0) seen_S_IFDIR++; + else if (strcmp (fname, "S_ISDIR") == 0) seen_S_ISDIR++; + else if (strcmp (fname, "S_IFIFO") == 0) seen_S_IFIFO++; + else if (strcmp (fname, "S_ISFIFO") == 0) seen_S_ISFIFO++; + else if (strcmp (fname, "S_IFLNK") == 0) seen_S_IFLNK++; + else if (strcmp (fname, "S_ISLNK") == 0) seen_S_ISLNK++; + else if (strcmp (fname, "S_IFREG") == 0) seen_S_IFREG++; + else if (strcmp (fname, "S_ISREG") == 0) seen_S_ISREG++; + } + break; + + default: + break; + } +} + +void +recognized_extern (const cpp_token *name) +{ + switch (special_file_handling) + { + case errno_h: + if (cpp_ideq (name, "errno")) + seen_errno = 1, required_other--; + break; + + default: + break; + } +} + +/* Called by scan_decls if it saw a function definition for a function + named FNAME. KIND is 'I' for an inline function; 'F' if a normal + function declaration preceded by 'extern "C"' (or nested inside + 'extern "C"' braces); or 'f' for other function declarations. */ + +void +recognized_function (const cpp_token *fname, unsigned int line, int kind, + int have_arg_list) +{ + struct partial_proto *partial; + int i; + struct fn_decl *fn; + + fn = lookup_std_proto ((const char *) NODE_NAME (fname->val.node), + NODE_LEN (fname->val.node)); + + /* Remove the function from the list of required function. */ + if (fn) + { + if (REQUIRED (fn)) + required_unseen_count--; + SET_SEEN (fn); + } + + /* If we have a full prototype, we're done. */ + if (have_arg_list) + return; + + if (kind == 'I') /* don't edit inline function */ + return; + + /* If the partial prototype was included from some other file, + we don't need to patch it up (in this run). */ + i = strlen (cur_file); + if (i < inc_filename_length + || strcmp (inc_filename, cur_file + (i - inc_filename_length)) != 0) + return; + + if (fn == NULL) + return; + if (fn->params[0] == '\0') + return; + + /* We only have a partial function declaration, + so remember that we have to add a complete prototype. */ + partial_count++; + partial + = (struct partial_proto *) + obstack_alloc (&scan_file_obstack, + sizeof (struct partial_proto)); + partial->line_seen = line; + partial->fn = fn; + fn->partial = partial; + partial->next = partial_proto_list; + partial_proto_list = partial; + if (verbose) + { + fprintf (stderr, "(%s: %s non-prototype function declaration.)\n", + inc_filename, fn->fname); + } +} + +/* For any name in NAMES that is defined as a macro, + call recognized_macro on it. */ + +static void +check_macro_names (cpp_reader *pfile, namelist names) +{ + size_t len; + while (*names) + { + len = strlen (names); + if (cpp_defined (pfile, (const unsigned char *)names, len)) + recognized_macro (names); + names += len + 1; + } +} + +static void +cb_file_change (cpp_reader *pfile ATTRIBUTE_UNUSED, + const struct line_map *map) +{ + /* Just keep track of current file name. */ + cur_file = map == NULL ? NULL : map->to_file; +} + +static void +read_scan_file (char *in_fname, int argc, char **argv) +{ + cpp_reader *scan_in; + cpp_callbacks *cb; + cpp_options *options; + struct fn_decl *fn; + int i, strings_processed; + struct symbol_list *cur_symbols; + + obstack_init (&scan_file_obstack); + + linemap_init (&line_table); + scan_in = cpp_create_reader (CLK_GNUC89, NULL, &line_table); + cb = cpp_get_callbacks (scan_in); + cb->file_change = cb_file_change; + + /* We are going to be scanning a header file out of its proper context, + so ignore warnings and errors. */ + options = cpp_get_options (scan_in); + options->inhibit_warnings = 1; + options->inhibit_errors = 1; + cpp_post_options (scan_in); + + if (!cpp_read_main_file (scan_in, in_fname)) + exit (FATAL_EXIT_CODE); + + cpp_change_file (scan_in, LC_RENAME, "<built-in>"); + cpp_init_builtins (scan_in, true); + cpp_change_file (scan_in, LC_RENAME, in_fname); + + /* Process switches after builtins so -D can override them. */ + for (i = 0; i < argc; i += strings_processed) + { + strings_processed = 0; + if (argv[i][0] == '-') + { + if (argv[i][1] == 'I') + { + if (argv[i][2] != '\0') + { + strings_processed = 1; + add_path (xstrdup (argv[i] + 2), BRACKET, false, false); + } + else if (i + 1 != argc) + { + strings_processed = 2; + add_path (xstrdup (argv[i + 1]), BRACKET, false, false); + } + } + else if (argv[i][1] == 'D') + { + if (argv[i][2] != '\0') + strings_processed = 1, cpp_define (scan_in, argv[i] + 2); + else if (i + 1 != argc) + strings_processed = 2, cpp_define (scan_in, argv[i + 1]); + } + } + + if (strings_processed == 0) + break; + } + + if (i < argc) + cpp_error (scan_in, CPP_DL_ERROR, "invalid option `%s'", argv[i]); + if (cpp_errors (scan_in)) + exit (FATAL_EXIT_CODE); + + register_include_chains (scan_in, NULL /* sysroot */, NULL /* iprefix */, + NULL /* imultilib */, true /* stdinc */, + false /* cxx_stdinc */, false /* verbose */); + + /* We are scanning a system header, so mark it as such. */ + cpp_make_system_header (scan_in, 1, 0); + + scan_decls (scan_in, argc, argv); + for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++) + check_macro_names (scan_in, cur_symbols->names); + + /* Traditionally, getc and putc are defined in terms of _filbuf and _flsbuf. + If so, those functions are also required. */ + if (special_file_handling == stdio_h + && (fn = lookup_std_proto ("_filbuf", 7)) != NULL) + { + unsigned char getchar_call[] = "getchar();\n"; + int seen_filbuf = 0; + + /* Scan the macro expansion of "getchar();". */ + cpp_push_buffer (scan_in, getchar_call, sizeof(getchar_call) - 1, + /* from_stage3 */ true); + for (;;) + { + const cpp_token *t = cpp_get_token (scan_in); + + if (t->type == CPP_EOF) + break; + else if (cpp_ideq (t, "_filbuf")) + seen_filbuf++; + } + + if (seen_filbuf) + { + int need_filbuf = !SEEN (fn) && !REQUIRED (fn); + struct fn_decl *flsbuf_fn = lookup_std_proto ("_flsbuf", 7); + int need_flsbuf + = flsbuf_fn && !SEEN (flsbuf_fn) && !REQUIRED (flsbuf_fn); + + /* Append "_filbuf" and/or "_flsbuf" to the required functions. */ + if (need_filbuf + need_flsbuf) + { + const char *new_list; + if (need_filbuf) + SET_REQUIRED (fn); + if (need_flsbuf) + SET_REQUIRED (flsbuf_fn); + if (need_flsbuf && need_filbuf) + new_list = "_filbuf\0_flsbuf\0"; + else if (need_flsbuf) + new_list = "_flsbuf\0"; + else /* if (need_flsbuf) */ + new_list = "_filbuf\0"; + add_symbols (ANSI_SYMBOL, new_list); + required_unseen_count += need_filbuf + need_flsbuf; + } + } + } + + if (required_unseen_count + partial_count + required_other == 0) + { + if (verbose) + fprintf (stderr, "%s: OK, nothing needs to be done.\n", inc_filename); + exit (SUCCESS_EXIT_CODE); + } + if (!verbose) + fprintf (stderr, "%s: fixing %s\n", progname, inc_filename); + else + { + if (required_unseen_count) + fprintf (stderr, "%s: %d missing function declarations.\n", + inc_filename, required_unseen_count); + if (partial_count) + fprintf (stderr, "%s: %d non-prototype function declarations.\n", + inc_filename, partial_count); + } +} + +static void +write_rbrac (void) +{ + struct fn_decl *fn; + const char *cptr; + struct symbol_list *cur_symbols; + + if (required_unseen_count) + { +#ifdef NO_IMPLICIT_EXTERN_C + fprintf (outf, "#ifdef __cplusplus\nextern \"C\" {\n#endif\n"); +#endif + } + + /* Now we print out prototypes for those functions that we haven't seen. */ + for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++) + { + int if_was_emitted = 0; + int name_len; + cptr = cur_symbols->names; + for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1) + { + int macro_protect = 0; + + if (cur_symbols->flags & MACRO_SYMBOL) + continue; + + fn = lookup_std_proto (cptr, name_len); + if (fn == NULL || !REQUIRED (fn)) + continue; + + if (!if_was_emitted) + { +/* what about curses. ??? or _flsbuf/_filbuf ??? */ + if (cur_symbols->flags & ANSI_SYMBOL) + fprintf (outf, + "#if defined(__USE_FIXED_PROTOTYPES__) || defined(__cplusplus) || defined (__STRICT_ANSI__)\n"); + else if (cur_symbols->flags & (POSIX1_SYMBOL|POSIX2_SYMBOL)) + fprintf (outf, + "#if defined(__USE_FIXED_PROTOTYPES__) || (defined(__cplusplus) \\\n\ + ? (!defined(__STRICT_ANSI__) || defined(_POSIX_SOURCE)) \\\n\ + : (defined(__STRICT_ANSI__) && defined(_POSIX_SOURCE)))\n"); + else if (cur_symbols->flags & XOPEN_SYMBOL) + { + fprintf (outf, + "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\ + || (defined(__STRICT_ANSI__) && defined(_XOPEN_SOURCE))\n"); + } + else if (cur_symbols->flags & XOPEN_EXTENDED_SYMBOL) + { + fprintf (outf, + "#if defined(__USE_FIXED_PROTOTYPES__) \\\n\ + || (defined(__STRICT_ANSI__) && defined(_XOPEN_EXTENDED_SOURCE))\n"); + } + else + { + fatal ("internal error for function %s", fn->fname); + } + if_was_emitted = 1; + } + + /* In the case of memmove, protect in case the application + defines it as a macro before including the header. */ + if (!strcmp (fn->fname, "memmove") + || !strcmp (fn->fname, "putc") + || !strcmp (fn->fname, "getc") + || !strcmp (fn->fname, "vprintf") + || !strcmp (fn->fname, "vfprintf") + || !strcmp (fn->fname, "vsprintf") + || !strcmp (fn->fname, "rewinddir") + || !strcmp (fn->fname, "abort")) + macro_protect = 1; + + if (macro_protect) + fprintf (outf, "#ifndef %s\n", fn->fname); + fprintf (outf, "extern %s %s (%s);\n", + fn->rtype, fn->fname, fn->params); + if (macro_protect) + fprintf (outf, "#endif\n"); + } + if (if_was_emitted) + fprintf (outf, + "#endif /* defined(__USE_FIXED_PROTOTYPES__) || ... */\n"); + } + if (required_unseen_count) + { +#ifdef NO_IMPLICIT_EXTERN_C + fprintf (outf, "#ifdef __cplusplus\n}\n#endif\n"); +#endif + } + + switch (special_file_handling) + { + case errno_h: + if (!seen_errno) + fprintf (outf, "extern int errno;\n"); + break; + case stdlib_h: + if (!seen_EXIT_FAILURE) + fprintf (outf, "#define EXIT_FAILURE 1\n"); + if (!seen_EXIT_SUCCESS) + fprintf (outf, "#define EXIT_SUCCESS 0\n"); + break; + case sys_stat_h: + if (!seen_S_ISBLK && seen_S_IFBLK) + fprintf (outf, + "#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)\n"); + if (!seen_S_ISCHR && seen_S_IFCHR) + fprintf (outf, + "#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)\n"); + if (!seen_S_ISDIR && seen_S_IFDIR) + fprintf (outf, + "#define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)\n"); + if (!seen_S_ISFIFO && seen_S_IFIFO) + fprintf (outf, + "#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)\n"); + if (!seen_S_ISLNK && seen_S_IFLNK) + fprintf (outf, + "#define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)\n"); + if (!seen_S_ISREG && seen_S_IFREG) + fprintf (outf, + "#define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)\n"); + break; + + default: + break; + } + +} + +/* Returns 1 iff the file is properly protected from multiple inclusion: + #ifndef PROTECT_NAME + #define PROTECT_NAME + #endif + + */ + +#define INF_GET() (inf_ptr < inf_limit ? *(unsigned char *) inf_ptr++ : EOF) +#define INF_UNGET(c) ((c)!=EOF && inf_ptr--) + +static int +inf_skip_spaces (int c) +{ + for (;;) + { + if (c == ' ' || c == '\t') + c = INF_GET (); + else if (c == '/') + { + c = INF_GET (); + if (c != '*') + { + (void) INF_UNGET (c); + return '/'; + } + c = INF_GET (); + for (;;) + { + if (c == EOF) + return EOF; + else if (c != '*') + { + if (c == '\n') + source_lineno++, lineno++; + c = INF_GET (); + } + else if ((c = INF_GET ()) == '/') + return INF_GET (); + } + } + else + break; + } + return c; +} + +/* Read into STR from inf_buffer upto DELIM. */ + +static int +inf_read_upto (sstring *str, int delim) +{ + int ch; + for (;;) + { + ch = INF_GET (); + if (ch == EOF || ch == delim) + break; + SSTRING_PUT (str, ch); + } + MAKE_SSTRING_SPACE (str, 1); + *str->ptr = 0; + return ch; +} + +static int +inf_scan_ident (sstring *s, int c) +{ + s->ptr = s->base; + if (ISIDST (c)) + { + for (;;) + { + SSTRING_PUT (s, c); + c = INF_GET (); + if (c == EOF || !(ISIDNUM (c))) + break; + } + } + MAKE_SSTRING_SPACE (s, 1); + *s->ptr = 0; + return c; +} + +/* Returns 1 if the file is correctly protected against multiple + inclusion, setting *ifndef_line to the line number of the initial #ifndef + and setting *endif_line to the final #endif. + Otherwise return 0. */ + +static int +check_protection (int *ifndef_line, int *endif_line) +{ + int c; + int if_nesting = 1; /* Level of nesting of #if's */ + char *protect_name = NULL; /* Identifier following initial #ifndef */ + int define_seen = 0; + + /* Skip initial white space (including comments). */ + for (;; lineno++) + { + c = inf_skip_spaces (' '); + if (c == EOF) + return 0; + if (c != '\n') + break; + } + if (c != '#') + return 0; + c = inf_scan_ident (&buf, inf_skip_spaces (' ')); + if (SSTRING_LENGTH (&buf) == 0 || strcmp (buf.base, "ifndef") != 0) + return 0; + + /* So far so good: We've seen an initial #ifndef. */ + *ifndef_line = lineno; + c = inf_scan_ident (&buf, inf_skip_spaces (c)); + if (SSTRING_LENGTH (&buf) == 0 || c == EOF) + return 0; + protect_name = xstrdup (buf.base); + + (void) INF_UNGET (c); + c = inf_read_upto (&buf, '\n'); + if (c == EOF) + return 0; + lineno++; + + for (;;) + { + c = inf_skip_spaces (' '); + if (c == EOF) + return 0; + if (c == '\n') + { + lineno++; + continue; + } + if (c != '#') + goto skip_to_eol; + c = inf_scan_ident (&buf, inf_skip_spaces (' ')); + if (SSTRING_LENGTH (&buf) == 0) + ; + else if (!strcmp (buf.base, "ifndef") + || !strcmp (buf.base, "ifdef") || !strcmp (buf.base, "if")) + { + if_nesting++; + } + else if (!strcmp (buf.base, "endif")) + { + if_nesting--; + if (if_nesting == 0) + break; + } + else if (!strcmp (buf.base, "else")) + { + if (if_nesting == 1) + return 0; + } + else if (!strcmp (buf.base, "define")) + { + c = inf_skip_spaces (c); + c = inf_scan_ident (&buf, c); + if (buf.base[0] > 0 && strcmp (buf.base, protect_name) == 0) + define_seen = 1; + } + skip_to_eol: + for (;;) + { + if (c == '\n' || c == EOF) + break; + c = INF_GET (); + } + if (c == EOF) + return 0; + lineno++; + } + + if (!define_seen) + return 0; + *endif_line = lineno; + /* Skip final white space (including comments). */ + for (;;) + { + c = inf_skip_spaces (' '); + if (c == EOF) + break; + if (c != '\n') + return 0; + } + + return 1; +} + +extern int main (int, char **); + +int +main (int argc, char **argv) +{ + int inf_fd; + struct stat sbuf; + int c; +#ifdef FIXPROTO_IGNORE_LIST + int i; +#endif + const char *cptr; + int ifndef_line; + int endif_line; + long to_read; + long int inf_size; + struct symbol_list *cur_symbols; + + progname = "fix-header"; + if (argv[0] && argv[0][0]) + { + char *p; + + progname = 0; + for (p = argv[0]; *p; p++) + if (*p == '/') + progname = p; + progname = progname ? progname+1 : argv[0]; + } + + if (argc < 4) + { + fprintf (stderr, "%s: Usage: foo.h infile.h outfile.h options\n", + progname); + exit (FATAL_EXIT_CODE); + } + + inc_filename = argv[1]; + inc_filename_length = strlen (inc_filename); + +#ifdef FIXPROTO_IGNORE_LIST + for (i = 0; files_to_ignore[i] != NULL; i++) + { + const char *const ignore_name = files_to_ignore[i]; + int ignore_len = strlen (ignore_name); + if (strncmp (inc_filename, ignore_name, ignore_len) == 0) + { + if (ignore_name[ignore_len-1] == '/' + || inc_filename[ignore_len] == '\0') + { + if (verbose) + fprintf (stderr, "%s: ignoring %s\n", progname, inc_filename); + exit (SUCCESS_EXIT_CODE); + } + } + + } +#endif + + if (strcmp (inc_filename, "sys/stat.h") == 0) + special_file_handling = sys_stat_h; + else if (strcmp (inc_filename, "errno.h") == 0) + special_file_handling = errno_h, required_other++; + else if (strcmp (inc_filename, "stdlib.h") == 0) + special_file_handling = stdlib_h, required_other+=2; + else if (strcmp (inc_filename, "stdio.h") == 0) + special_file_handling = stdio_h; + include_entry = std_include_table; + while (include_entry->name != NULL + && ((strcmp (include_entry->name, CONTINUED) == 0) + || strcmp (inc_filename, include_entry->name) != 0)) + include_entry++; + + if (include_entry->name != NULL) + { + const struct std_include_entry *entry; + cur_symbol_table_size = 0; + for (entry = include_entry; ;) + { + if (entry->flags) + add_symbols (entry->flags, entry->names); + entry++; + if (!entry->name || strcmp (entry->name, CONTINUED) != 0) + break; + } + } + else + symbol_table[0].names = NULL; + + /* Count and mark the prototypes required for this include file. */ + for (cur_symbols = &symbol_table[0]; cur_symbols->names; cur_symbols++) + { + int name_len; + if (cur_symbols->flags & MACRO_SYMBOL) + continue; + cptr = cur_symbols->names; + for ( ; (name_len = strlen (cptr)) != 0; cptr+= name_len + 1) + { + struct fn_decl *fn = lookup_std_proto (cptr, name_len); + required_unseen_count++; + if (fn == NULL) + fprintf (stderr, "Internal error: No prototype for %s\n", cptr); + else + SET_REQUIRED (fn); + } + } + + read_scan_file (argv[2], argc - 4, argv + 4); + + inf_fd = open (argv[2], O_RDONLY, 0666); + if (inf_fd < 0) + { + fprintf (stderr, "%s: Cannot open '%s' for reading -", + progname, argv[2]); + perror (NULL); + exit (FATAL_EXIT_CODE); + } + if (fstat (inf_fd, &sbuf) < 0) + { + fprintf (stderr, "%s: Cannot get size of '%s' -", progname, argv[2]); + perror (NULL); + exit (FATAL_EXIT_CODE); + } + inf_size = sbuf.st_size; + inf_buffer = XNEWVEC (char, inf_size + 2); + inf_ptr = inf_buffer; + + to_read = inf_size; + while (to_read > 0) + { + long i = read (inf_fd, inf_buffer + inf_size - to_read, to_read); + if (i < 0) + { + fprintf (stderr, "%s: Failed to read '%s' -", progname, argv[2]); + perror (NULL); + exit (FATAL_EXIT_CODE); + } + if (i == 0) + { + inf_size -= to_read; + break; + } + to_read -= i; + } + + close (inf_fd); + + /* Inf_size may have changed if read was short (as on VMS) */ + inf_buffer[inf_size] = '\n'; + inf_buffer[inf_size + 1] = '\0'; + inf_limit = inf_buffer + inf_size; + + /* If file doesn't end with '\n', add one. */ + if (inf_limit > inf_buffer && inf_limit[-1] != '\n') + inf_limit++; + + unlink (argv[3]); + outf = fopen (argv[3], "w"); + if (outf == NULL) + { + fprintf (stderr, "%s: Cannot open '%s' for writing -", + progname, argv[3]); + perror (NULL); + exit (FATAL_EXIT_CODE); + } + + lineno = 1; + + if (check_protection (&ifndef_line, &endif_line)) + { + lbrac_line = ifndef_line+1; + rbrac_line = endif_line; + } + else + { + lbrac_line = 1; + rbrac_line = -1; + } + + /* Reset input file. */ + inf_ptr = inf_buffer; + lineno = 1; + + for (;;) + { + if (lineno == lbrac_line) + write_lbrac (); + if (lineno == rbrac_line) + write_rbrac (); + for (;;) + { + struct fn_decl *fn; + c = INF_GET (); + if (c == EOF) + break; + if (ISIDST (c)) + { + c = inf_scan_ident (&buf, c); + (void) INF_UNGET (c); + fputs (buf.base, outf); + fn = lookup_std_proto (buf.base, strlen (buf.base)); + /* We only want to edit the declaration matching the one + seen by scan-decls, as there can be multiple + declarations, selected by #ifdef __STDC__ or whatever. */ + if (fn && fn->partial && fn->partial->line_seen == lineno) + { + c = inf_skip_spaces (' '); + if (c == EOF) + break; + if (c == '(') + { + c = inf_skip_spaces (' '); + if (c == ')') + { + fprintf (outf, " _PARAMS((%s))", fn->params); + } + else + { + putc ('(', outf); + (void) INF_UNGET (c); + } + } + else + fprintf (outf, " %c", c); + } + } + else + { + putc (c, outf); + if (c == '\n') + break; + } + } + if (c == EOF) + break; + lineno++; + } + if (rbrac_line < 0) + write_rbrac (); + + fclose (outf); + + return 0; +}