/* Implement the SELECT statement for character variables.
- Contributed by Andy Vaught
+ Copyright 2008, 2009 Free Software Foundation, Inc.
-This file is part of the GNU Fortran 95 runtime library (libgfor).
+This file is part of the GNU Fortran runtime library (libgfortran).
-Libgfor 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 2, or (at your option)
-any later version.
+Libgfortran 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 of the License, or (at your option) any later version.
-Libgfor is distributed in the hope that it will be useful,
+Libgfortran 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 libgfor; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
-#include "libgfortran.h"
-
-typedef struct
-{
- char *low;
- int low_len;
- char *high;
- int high_len;
- void *address;
-}
-select_struct;
-
-extern void * select_string (select_struct *table, int table_len,
- void *default_jump, const char *selector,
- int selector_len);
-export_proto(select_string);
-
-
-/* select_string()-- Given a selector string and a table of
- * select_struct structures, return the address to jump to. */
-
-void *
-select_string (select_struct *table, int table_len, void *default_jump,
- const char *selector, int selector_len)
-{
- select_struct *t;
- int i, low, high, mid;
-
- if (table_len == 0)
- return default_jump;
-
- /* Record the default address if present */
-
- if (table->low == NULL && table->high == NULL)
- {
- default_jump = table->address;
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+<http://www.gnu.org/licenses/>. */
- table++;
- table_len--;
- if (table_len == 0)
- return default_jump;
- }
-
- /* Try the high and low bounds if present. */
-
- if (table->low == NULL)
- {
- if (compare_string (table->high_len, table->high,
- selector_len, selector) >= 0)
- return table->address;
-
- table++;
- table_len--;
- if (table_len == 0)
- return default_jump;
- }
-
- t = table + table_len - 1;
-
- if (t->high == NULL)
- {
- if (compare_string (t->low_len, t->low,
- selector_len, selector) <= 0)
- return t->address;
-
- table_len--;
- if (table_len == 0)
- return default_jump;
- }
-
- /* At this point, the only table entries are bounded entries. Find
- the right entry with a binary chop. */
-
- low = -1;
- high = table_len;
+#include "libgfortran.h"
- while (low + 1 < high)
- {
- mid = (low + high) / 2;
- t = table + mid;
- i = compare_string (t->low_len, t->low, selector_len, selector);
+/* The string selection function is defined using a few generic macros
+ in select_inc.c, so we avoid code duplication between the various
+ character type kinds. */
- if (i == 0)
- return t->address;
+#undef CHARTYPE
+#define CHARTYPE char
+#undef SUFFIX
+#define SUFFIX(x) x
- if (i < 0)
- low = mid;
- else
- high = mid;
- }
+#include "select_inc.c"
- /* The string now lies between the low indeces of the now-adjacent
- high and low entries. Because it is less than the low entry of
- 'high', it can't be that one. If low is still -1, then no
- entries match. Otherwise, we have to check the high entry of
- 'low'. */
- if (low == -1)
- return default_jump;
+#undef CHARTYPE
+#define CHARTYPE gfc_char4_t
+#undef SUFFIX
+#define SUFFIX(x) x ## _char4
- t = table + low;
- if (compare_string (selector_len, selector,
- t->high_len, t->high) <= 0)
- return t->address;
+#include "select_inc.c"
- return default_jump;
-}
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