/* Initialization of the front end environment, before command line
options are parsed. Signal handlers, internationalization etc.
ARGV0 is main's argv[0]. */
static void
general_init (const char *argv0)
{
const char *p;
p = argv0 + strlen (argv0);
while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
--p;
progname = p;
xmalloc_set_program_name (progname);
hex_init ();
gcc_init_libintl ();
line_table = XNEW (struct line_maps);
linemap_init (line_table);
line_table->reallocator = xrealloc;
}
void
general_init(const char *argv0)
{
const char *p;
p = argv0 + strlen(argv0);
while(p != argv0 && !IS_DIR_SEPARATOR(p[-1]))
--p;
progname = p;
xmalloc_set_program_name(progname);
hex_init();
/* Unlock the stdio streams. */
unlock_std_streams();
gcc_init_libintl();
/* Initialize the diagnostics reporting machinery, so option parsing
can give warnings and errors. */
diagnostic_initialize(global_dc);
/* Set a default printer. Language specific initializations will
override it later. */
pp_format_decoder(global_dc->printer) = &default_tree_printer;
/* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
#ifdef SIGSEGV
signal(SIGSEGV, crash_signal);
#endif
#ifdef SIGILL
signal(SIGILL, crash_signal);
#endif
#ifdef SIGBUS
signal(SIGBUS, crash_signal);
#endif
#ifdef SIGABRT
signal(SIGABRT, crash_signal);
#endif
#if defined SIGIOT &&(!defined SIGABRT || SIGABRT != SIGIOT)
signal(SIGIOT, crash_signal);
#endif
#ifdef SIGFPE
signal(SIGFPE, crash_signal);
#endif
/* Other host-specific signal setup. */
(*host_hooks.extra_signals)();
/* Initialize the garbage-collector, string pools and tree type hash
table. */
init_ggc();
init_stringpool();
linemap_init(&line_table);
init_ttree();
/* Initialize register usage now so switches may override. */
init_reg_sets();
/* Register the language-independent parameters. */
add_params(lang_independent_params, LAST_PARAM);
/* This must be done after add_params but before argument processing. */
init_ggc_heuristics();
init_optimization_passes();
}
/* Initialize a cpp_reader structure. */
cpp_reader *
cpp_create_reader (enum c_lang lang, hash_table *table)
{
cpp_reader *pfile;
/* Initialize this instance of the library if it hasn't been already. */
init_library ();
pfile = xcalloc (1, sizeof (cpp_reader));
cpp_set_lang (pfile, lang);
CPP_OPTION (pfile, warn_multichar) = 1;
CPP_OPTION (pfile, discard_comments) = 1;
CPP_OPTION (pfile, discard_comments_in_macro_exp) = 1;
CPP_OPTION (pfile, show_column) = 1;
CPP_OPTION (pfile, tabstop) = 8;
CPP_OPTION (pfile, operator_names) = 1;
CPP_OPTION (pfile, warn_trigraphs) = 2;
CPP_OPTION (pfile, warn_endif_labels) = 1;
CPP_OPTION (pfile, warn_deprecated) = 1;
CPP_OPTION (pfile, warn_long_long) = !CPP_OPTION (pfile, c99);
CPP_OPTION (pfile, dollars_in_ident) = 1;
CPP_OPTION (pfile, warn_dollars) = 1;
/* Default CPP arithmetic to something sensible for the host for the
benefit of dumb users like fix-header. */
CPP_OPTION (pfile, precision) = CHAR_BIT * sizeof (long);
CPP_OPTION (pfile, char_precision) = CHAR_BIT;
CPP_OPTION (pfile, wchar_precision) = CHAR_BIT * sizeof (int);
CPP_OPTION (pfile, int_precision) = CHAR_BIT * sizeof (int);
CPP_OPTION (pfile, unsigned_char) = 0;
CPP_OPTION (pfile, unsigned_wchar) = 1;
CPP_OPTION (pfile, bytes_big_endian) = 1; /* does not matter */
/* Default to locale/UTF-8. */
CPP_OPTION (pfile, narrow_charset) = _cpp_default_encoding ();
CPP_OPTION (pfile, wide_charset) = 0;
CPP_OPTION (pfile, input_charset) = _cpp_default_encoding ();
/* A fake empty "directory" used as the starting point for files
looked up without a search path. Name cannot be '/' because we
don't want to prepend anything at all to filenames using it. All
other entries are correct zero-initialized. */
pfile->no_search_path.name = (char *) "";
/* Initialize the line map. Start at logical line 1, so we can use
a line number of zero for special states. */
linemap_init (&pfile->line_maps);
pfile->line = 1;
/* Initialize lexer state. */
pfile->state.save_comments = ! CPP_OPTION (pfile, discard_comments);
/* Set up static tokens. */
pfile->avoid_paste.type = CPP_PADDING;
pfile->avoid_paste.val.source = NULL;
pfile->eof.type = CPP_EOF;
pfile->eof.flags = 0;
/* Create a token buffer for the lexer. */
_cpp_init_tokenrun (&pfile->base_run, 250);
pfile->cur_run = &pfile->base_run;
pfile->cur_token = pfile->base_run.base;
/* Initialize the base context. */
pfile->context = &pfile->base_context;
pfile->base_context.macro = 0;
pfile->base_context.prev = pfile->base_context.next = 0;
/* Aligned and unaligned storage. */
pfile->a_buff = _cpp_get_buff (pfile, 0);
pfile->u_buff = _cpp_get_buff (pfile, 0);
/* The expression parser stack. */
_cpp_expand_op_stack (pfile);
/* Initialize the buffer obstack. */
_obstack_begin (&pfile->buffer_ob, 0, 0,
(void *(*) (long)) xmalloc,
(void (*) (void *)) free);
_cpp_init_files (pfile);
_cpp_init_hashtable (pfile, table);
return pfile;
}
