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| 1 | +/* $Id: lshift-type.c 53089 2012-07-06 11:18:26Z vinc17/ypig $ |
| 2 | + |
| 3 | +Tests on left-shift type, written by Vincent Lefevre <vincent@vinc17.net>. |
| 4 | + |
| 5 | +ISO C99 TC3 says: [6.5.7#3] "The integer promotions are performed on |
| 6 | +each of the operands. The type of the result is that of the promoted |
| 7 | +left operand." |
| 8 | +*/ |
| 9 | + |
| 10 | +#include <stdio.h> |
| 11 | + |
| 12 | +#define PTYPE(M) ((M) < 0 || -(M) < 0 ? -1 : 1) * (int) sizeof((M)+0) |
| 13 | +#define CHECK(X,T) check(#X, PTYPE(X), PTYPE((X) << (T) 1)) |
| 14 | +#define TEST1(X,T) do { CHECK(X,T); CHECK(X,unsigned T); } while (0) |
| 15 | +#define TEST2(X) \ |
| 16 | + do \ |
| 17 | + { \ |
| 18 | + TEST1((X),short); \ |
| 19 | + TEST1((X),int); \ |
| 20 | + TEST1((X),long); \ |
| 21 | + TEST1((X),long long); \ |
| 22 | + } \ |
| 23 | + while (0) |
| 24 | +#define TEST3(X,T) do { TEST2((T)(X)); TEST2((unsigned T)(X)); } while (0) |
| 25 | +#define TEST4(X) \ |
| 26 | + do \ |
| 27 | + { \ |
| 28 | + TEST3((X),short); \ |
| 29 | + TEST3((X),int); \ |
| 30 | + TEST3((X),long); \ |
| 31 | + TEST3((X),long long); \ |
| 32 | + } \ |
| 33 | + while (0) |
| 34 | + |
| 35 | +static int debug, nfailed = 0; |
| 36 | + |
| 37 | +static void check (const char *s, int arg1, int shift) |
| 38 | +{ |
| 39 | + int failed = arg1 != shift; |
| 40 | + if (debug || failed) |
| 41 | + printf ("%s %d %d\n", s, arg1, shift); |
| 42 | + nfailed += failed; |
| 43 | +} |
| 44 | + |
| 45 | +int main (int argc, char **argv) |
| 46 | +{ |
| 47 | + debug = argc > 1; |
| 48 | + TEST4(1); |
| 49 | + TEST4(-1); |
| 50 | + printf ("%d test(s) failed\n", nfailed); |
| 51 | + return nfailed != 0; |
| 52 | +} |