53 lines
1.5 KiB
C
53 lines
1.5 KiB
C
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/* $Id: lshift-type.c 53089 2012-07-06 11:18:26Z vinc17/ypig $
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Tests on left-shift type, written by Vincent Lefevre <vincent@vinc17.net>.
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ISO C99 TC3 says: [6.5.7#3] "The integer promotions are performed on
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each of the operands. The type of the result is that of the promoted
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left operand."
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*/
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#include <stdio.h>
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#define PTYPE(M) ((M) < 0 || -(M) < 0 ? -1 : 1) * (int) sizeof((M)+0)
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#define CHECK(X,T) check(#X, PTYPE(X), PTYPE((X) << (T) 1))
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#define TEST1(X,T) do { CHECK(X,T); CHECK(X,unsigned T); } while (0)
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#define TEST2(X) \
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do \
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{ \
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TEST1((X),short); \
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TEST1((X),int); \
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TEST1((X),long); \
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TEST1((X),long long); \
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} \
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while (0)
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#define TEST3(X,T) do { TEST2((T)(X)); TEST2((unsigned T)(X)); } while (0)
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#define TEST4(X) \
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do \
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{ \
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TEST3((X),short); \
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TEST3((X),int); \
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TEST3((X),long); \
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TEST3((X),long long); \
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} \
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while (0)
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static int debug, nfailed = 0;
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static void check (const char *s, int arg1, int shift)
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{
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int failed = arg1 != shift;
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if (debug || failed)
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printf ("%s %d %d\n", s, arg1, shift);
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nfailed += failed;
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}
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int main (int argc, char **argv)
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{
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debug = argc > 1;
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TEST4(1);
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TEST4(-1);
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printf ("%d test(s) failed\n", nfailed);
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return nfailed != 0;
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}
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