/* Command line option handling.
- Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
+ Free Software Foundation, Inc.
Contributed by Neil Booth.
This file is part of GCC.
You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301, USA. */
#include "config.h"
#include "system.h"
const char **in_fnames;
unsigned num_in_fnames;
-static size_t find_opt (const char *, int);
static int common_handle_option (size_t scode, const char *arg, int value);
static unsigned int handle_option (const char **argv, unsigned int lang_mask);
static char *write_langs (unsigned int lang_mask);
static void handle_options (unsigned int, const char **, unsigned int);
static void wrap_help (const char *help, const char *item, unsigned int);
static void print_help (void);
-static void print_filtered_help (unsigned int flag);
+static void print_filtered_help (unsigned int);
static unsigned int print_switch (const char *text, unsigned int indent);
-/* Perform a binary search to find which option the command-line INPUT
- matches. Returns its index in the option array, and N_OPTS
- (cl_options_count) on failure.
-
- This routine is quite subtle. A normal binary search is not good
- enough because some options can be suffixed with an argument, and
- multiple sub-matches can occur, e.g. input of "-pedantic" matching
- the initial substring of "-pedantic-errors".
-
- A more complicated example is -gstabs. It should match "-g" with
- an argument of "stabs". Suppose, however, that the number and list
- of switches are such that the binary search tests "-gen-decls"
- before having tested "-g". This doesn't match, and as "-gen-decls"
- is less than "-gstabs", it will become the lower bound of the
- binary search range, and "-g" will never be seen. To resolve this
- issue, opts.sh makes "-gen-decls" point, via the back_chain member,
- to "-g" so that failed searches that end between "-gen-decls" and
- the lexicographically subsequent switch know to go back and see if
- "-g" causes a match (which it does in this example).
-
- This search is done in such a way that the longest match for the
- front end in question wins. If there is no match for the current
- front end, the longest match for a different front end is returned
- (or N_OPTS if none) and the caller emits an error message. */
-static size_t
-find_opt (const char *input, int lang_mask)
-{
- size_t mn, mx, md, opt_len;
- size_t match_wrong_lang;
- int comp;
-
- mn = 0;
- mx = cl_options_count;
-
- /* Find mn such this lexicographical inequality holds:
- cl_options[mn] <= input < cl_options[mn + 1]. */
- while (mx - mn > 1)
- {
- md = (mn + mx) / 2;
- opt_len = cl_options[md].opt_len;
- comp = strncmp (input, cl_options[md].opt_text + 1, opt_len);
-
- if (comp < 0)
- mx = md;
- else
- mn = md;
- }
-
- /* This is the switch that is the best match but for a different
- front end, or cl_options_count if there is no match at all. */
- match_wrong_lang = cl_options_count;
-
- /* Backtrace the chain of possible matches, returning the longest
- one, if any, that fits best. With current GCC switches, this
- loop executes at most twice. */
- do
- {
- const struct cl_option *opt = &cl_options[mn];
-
- /* Is the input either an exact match or a prefix that takes a
- joined argument? */
- if (!strncmp (input, opt->opt_text + 1, opt->opt_len)
- && (input[opt->opt_len] == '\0' || (opt->flags & CL_JOINED)))
- {
- /* If language is OK, return it. */
- if (opt->flags & lang_mask)
-
-
- /* If we haven't remembered a prior match, remember this
- one. Any prior match is necessarily better. */
- if (match_wrong_lang == cl_options_count)
- match_wrong_lang = mn;
- }
-
- /* Try the next possibility. This is cl_options_count if there
- are no more. */
- mn = opt->back_chain;
- }
- while (mn != cl_options_count);
-
- /* Return the best wrong match, or cl_options_count if none. */
- return match_wrong_lang;
-}
-
/* If ARG is a non-negative integer made up solely of digits, return its
value, otherwise return -1. */
static int
if (mask & (1U << n))
len += strlen (lang_name) + 1;
- result = xmalloc (len);
+ result = XNEWVEC (char, len);
len = 0;
for (n = 0; (lang_name = lang_names[n]) != 0; n++)
if (mask & (1U << n))
/* Drop the "no-" from negative switches. */
size_t len = strlen (opt) - 3;
- dup = xmalloc (len + 1);
+ dup = XNEWVEC (char, len + 1);
dup[0] = '-';
dup[1] = opt[1];
memcpy (dup + 2, opt + 5, len - 2 + 1);
}
if (option->flags & lang_mask)
- if ((*lang_hooks.handle_option) (opt_index, arg, value) == 0)
+ if (lang_hooks.handle_option (opt_index, arg, value) == 0)
result = 0;
if (result && (option->flags & CL_COMMON))
}
/* Handle FILENAME from the command line. */
-void
+static void
add_input_filename (const char *filename)
{
num_in_fnames++;
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