71900fe836
* gdb.base/sizeof.c (main): Print the value of '\377'. * gdb.base/sizeof.exp: Check the sign of '\377'.
123 lines
2.8 KiB
C
123 lines
2.8 KiB
C
#include <stdio.h>
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typedef char padding[16];
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struct {
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padding p1;
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char v;
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padding p2;
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} padding_char;
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struct {
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padding p1;
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short v;
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padding p2;
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} padding_short;
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struct {
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padding p1;
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int v;
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padding p2;
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} padding_int;
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struct {
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padding p1;
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long v;
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padding p2;
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} padding_long;
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struct {
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padding p1;
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long long v;
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padding p2;
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} padding_long_long;
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struct {
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padding p1;
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float v;
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padding p2;
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} padding_float;
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struct {
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padding p1;
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double v;
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padding p2;
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} padding_double;
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struct {
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padding p1;
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long double v;
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padding p2;
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} padding_long_double;
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static void
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fill (void *buf, long sizeof_buf)
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{
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char *p = buf;
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int i;
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for (i = 0; i < sizeof_buf; i++)
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p[i] = "The quick brown dingo jumped over the layzy dog."[i];
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}
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void
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fill_structs (void)
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{
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fill (&padding_char.p1, sizeof (padding));
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fill (&padding_char.v, sizeof (padding_char.v));
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fill (&padding_char.p2, sizeof (padding));
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fill (&padding_short.p1, sizeof (padding));
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fill (&padding_short.v, sizeof (padding_short.v));
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fill (&padding_short.p2, sizeof (padding));
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fill (&padding_int.p1, sizeof (padding));
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fill (&padding_int.v, sizeof (padding_int.v));
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fill (&padding_int.p2, sizeof (padding));
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fill (&padding_long.p1, sizeof (padding));
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fill (&padding_long.v, sizeof (padding_long.v));
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fill (&padding_long.p2, sizeof (padding));
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fill (&padding_long_long.p1, sizeof (padding));
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fill (&padding_long_long.v, sizeof (padding_long_long.v));
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fill (&padding_long_long.p2, sizeof (padding));
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fill (&padding_float.p1, sizeof (padding));
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fill (&padding_float.v, sizeof (padding_float.v));
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fill (&padding_float.p2, sizeof (padding));
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fill (&padding_double.p1, sizeof (padding));
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fill (&padding_double.v, sizeof (padding_double.v));
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fill (&padding_double.p2, sizeof (padding));
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fill (&padding_long_double.p1, sizeof (padding));
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fill (&padding_long_double.v, sizeof (padding_long_double.v));
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fill (&padding_long_double.p2, sizeof (padding));
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}
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int
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main ()
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{
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fill_structs ();
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printf ("sizeof (char) == %d\n", sizeof (char));
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printf ("sizeof (short) == %d\n", sizeof (short));
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printf ("sizeof (int) == %d\n", sizeof (int));
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printf ("sizeof (long) == %d\n", sizeof (long));
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printf ("sizeof (long long) == %d\n", sizeof (long long));
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printf ("sizeof (void *) == %d\n", sizeof (void*));
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printf ("sizeof (void (*)(void)) == %d\n", sizeof (void (*)(void)));
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printf ("sizeof (float) == %d\n", sizeof (float));
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printf ("sizeof (double) == %d\n", sizeof (double));
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printf ("sizeof (long double) == %d\n", sizeof (long double));
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/* Signed char? */
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printf ("valueof ('\\377') == %d\n", '\377');
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printf ("valueof ((int) (char) -1) == %d\n", (int) (char) -1);
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printf ("valueof ((int) (signed char) -1) == %d\n", (int) (signed char) -1);
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printf ("valueof ((int) (unsigned char) -1) == %d\n", (int) (unsigned char) -1);
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return 0;
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}
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