gdb/testsuite/gdb.base/long_long.c

   1 /* This test script is part of GDB, the GNU debugger.
   2
   3    Copyright 1999, 2004,
   4    Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18    */
  19
  20 /* Test long long expression; test printing in general.
  21  *
  22  * /CLO/BUILD_ENV/Exports/cc -g +e -o long_long long_long.c
  23  *
  24  * or
  25  *
  26  * cc +e +DA2.0 -g -o long_long long_long.c
  27  */
  28
  29 #include <string.h>
  30
  31 enum { MAX_BYTES = 16 };
  32
  33 void
  34 pack (unsigned char b[MAX_BYTES], int size, int nr)
  35 {
  36   static long long val[] = { 0x123456789abcdefLL, 01234567123456701234567LL, 12345678901234567890ULL};
  37   volatile static int e = 1;
  38   int i;
  39   for (i = 0; i < nr; i++)
  40     {
  41       int offset;
  42       if (*(char *)&e)
  43         /* Little endian.  */
  44         offset = sizeof (long long) - size;
  45       else
  46         /* Big endian endian.  */
  47         offset = 0;
  48       memcpy (b + size * i, (char *) val + sizeof (long long) * i + offset, size);
  49     }
  50 }
  51
  52 unsigned char b[MAX_BYTES];
  53 unsigned char h[MAX_BYTES];
  54 unsigned char w[MAX_BYTES];
  55 unsigned char g[MAX_BYTES];
  56
  57 unsigned char c[MAX_BYTES];
  58 unsigned char s[MAX_BYTES];
  59 unsigned char i[MAX_BYTES];
  60 unsigned char l[MAX_BYTES];
  61 unsigned char ll[MAX_BYTES];
  62
  63 int known_types()
  64 {
  65   /* A union is used here as, hopefully it has well defined packing
  66      rules.  */
  67   struct {
  68     long long bin, oct, dec, hex;
  69   } val;
  70   memset (&val, 0, sizeof val);
  71
  72   /* Known values, filling the full 64 bits.  */
  73   val.bin = 0x123456789abcdefLL; /* 64 bits = 16 hex digits */
  74   val.oct = 01234567123456701234567LL; /*  = 21+ octal digits */
  75   val.dec = 12345678901234567890ULL;    /*  = 19+ decimal digits */
  76
  77   /* Stop here and look!  */
  78   val.hex = val.bin - val.dec | val.oct;
  79
  80   return 0;
  81 }
  82
  83 int main() {
  84
  85    /* Pack Byte, Half, Word and Giant arrays with byte-orderd values.
  86       That way "(gdb) x" gives the same output on different
  87       architectures.  */
  88    pack (b, 1, 2);
  89    pack (h, 2, 2);
  90    pack (w, 4, 2);
  91    pack (g, 8, 2);
  92    pack (c, sizeof (char), 2);
  93    pack (s, sizeof (short), 2);
  94    pack (i, sizeof (int), 2);
  95    pack (l, sizeof (long), 2);
  96    pack (ll, sizeof (long long), 2);
  97
  98    known_types();
  99
 100    return 0;
 101 }