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78 lines
1.3 KiB
C
78 lines
1.3 KiB
C
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/* pr#1102 - Passing structs/unions <= 4 bytes to/from functions */
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#include <stdlib.h>
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#include <stdio.h>
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typedef struct test1_s {
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char a;
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int b;
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char c;
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} test1_t;
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test1_t test1(int a, int b, int c)
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{
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test1_t res;
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res.a = a;
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res.b = b;
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res.c = c;
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return res;
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}
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int test2(test1_t s)
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{
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printf("a: %d b: %d c: %d\n", s.a, s.b, s.c);
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if ((s.a != 13) || (s.b != 4711) || (s.c != 99)) {
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return 0;
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}
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return 1;
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}
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typedef struct test2_s {
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char a;
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char b;
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char c;
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char d;
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} test2_t;
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test2_t test3(test1_t s)
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{
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test2_t ret;
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printf("a: %d b: %d c: %d\n", s.a, s.b, s.c);
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ret.a = s.c;
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ret.b = s.b & 0xff;
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ret.c = s.b >> 8;
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ret.d = s.a;
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return ret;
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}
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int main(void) {
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test1_t t1;
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test2_t t2;
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t1 = test1(12, 1842, 23);
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printf("a: %d b: %d c: %d\n", t1.a, t1.b, t1.c);
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if ((t1.a != 12) || (t1.b != 1842) || (t1.c != 23)) {
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return EXIT_FAILURE;
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}
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t1.a = 13;
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t1.b = 4711;
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t1.c = 99;
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if (test2(t1) != 1) {
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return EXIT_FAILURE;
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}
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t1.a = 66;
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t1.b = 0x7788;
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t1.c = 22;
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t2 = test3(t1);
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printf("a: %d b: %d c: %d d: %d\n", t2.a, t2.b, t2.c, t2.d);
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if ((t2.a != 22) || (t2.b != 0x88) || (t2.c != 0x77) || (t2.d != 66)) {
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return EXIT_FAILURE;
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}
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printf("all fine\n");
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return EXIT_SUCCESS;
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}
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