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  1. #include <stdio.h>
  2. #include <stdint.h>
  3.  
  4. void f(uint32_t result, size_t last_generated_size) {
  5. 	printf("conditional(0x%x << %2zu) = 0x%08x\n", result, 8 * last_generated_size, last_generated_size >= sizeof(result) ? 0 : result << (8 * last_generated_size));
  6. }
  7.  
  8. int main(void) {
  9. 	uint32_t r = 0x12345678;
  10. 	for (size_t s = 0; s <= 8; s++) {
  11. 		f(r, s);
  12. 	}
  13. 	return 0;
  14. }
  15.  
Success #stdin #stdout 0.01s 5304KB
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stdin
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Standard input is empty
stdout
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conditional(0x12345678 <<  0) = 0x12345678
conditional(0x12345678 <<  8) = 0x34567800
conditional(0x12345678 << 16) = 0x56780000
conditional(0x12345678 << 24) = 0x78000000
conditional(0x12345678 << 32) = 0x00000000
conditional(0x12345678 << 40) = 0x00000000
conditional(0x12345678 << 48) = 0x00000000
conditional(0x12345678 << 56) = 0x00000000
conditional(0x12345678 << 64) = 0x00000000
https://ideone.com/Oy1PqS
language:
C99 (gcc 8.3)
created:
3 years ago
visibility:
secret

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