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+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2008, 2009 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 of the License, 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. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Test gdb's "return" command in reverse. */
+
+int void_test = 0;
+int main_test = 0;
+
+char char_returnval = '1';
+short short_returnval = 1;
+int int_returnval = 1;
+long long_returnval = 1;
+long long long_long_returnval = 1;
+float float_returnval = 1;
+double double_returnval = 1;
+
+union {
+ char char_testval;
+ short short_testval;
+ int int_testval;
+ long long_testval;
+ long long long_long_testval;
+ float float_testval;
+ double double_testval;
+ char ffff[80];
+} testval;
+
+void void_func ()
+{
+ void_test = 1; /* VOID FUNC */
+}
+
+char char_func ()
+{
+ return char_returnval; /* CHAR FUNC */
+}
+
+short short_func ()
+{
+ return short_returnval; /* SHORT FUNC */
+}
+
+int int_func ()
+{
+ return int_returnval; /* INT FUNC */
+}
+
+long long_func ()
+{
+ return long_returnval; /* LONG FUNC */
+}
+
+long long long_long_func ()
+{
+ return long_long_returnval; /* LONG LONG FUNC */
+}
+
+float float_func ()
+{
+ return float_returnval; /* FLOAT FUNC */
+}
+
+double double_func ()
+{
+ return double_returnval; /* DOUBLE FUNC */
+}
+
+int main (int argc, char **argv)
+{
+ char char_resultval;
+ short short_resultval;
+ int int_resultval;
+ long long_resultval;
+ long long long_long_resultval;
+ float float_resultval;
+ double double_resultval;
+ int i;
+
+ /* A "test load" that will insure that the function really returns
+ a ${type} (as opposed to just a truncated or part of a ${type}). */
+ for (i = 0; i < sizeof (testval.ffff); i++)
+ testval.ffff[i] = 0xff;
+
+ void_func (); /* call to void_func */
+ char_resultval = char_func (); /* void_checkpoint */
+ short_resultval = short_func (); /* char_checkpoint */
+ int_resultval = int_func (); /* short_checkpoint */
+ long_resultval = long_func (); /* int_checkpoint */
+ long_long_resultval = long_long_func (); /* long_checkpoint */
+
+ /* On machines using IEEE floating point, the test pattern of all
+ 1-bits established above turns out to be a floating-point NaN
+ ("Not a Number"). According to the IEEE rules, NaN's aren't even
+ equal to themselves. This can lead to stupid conversations with
+ GDB like:
+
+ (gdb) p testval.float_testval == testval.float_testval
+ $7 = 0
+ (gdb)
+
+ This is the correct answer, but it's not the sort of thing
+ return2.exp wants to see. So to make things work the way they
+ ought, we'll set aside the `union' cleverness and initialize the
+ test values explicitly here. These values have interesting bits
+ throughout the value, so we'll still detect truncated values. */
+
+ testval.float_testval = 2.7182818284590452354;/* long_long_checkpoint */
+ float_resultval = float_func ();
+ testval.double_testval = 3.14159265358979323846; /* float_checkpoint */
+ double_resultval = double_func ();
+ main_test = 1; /* double_checkpoint */
+ return 0;
+}