kaguya
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
#include <assert.h>
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#include <stdint.h>
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#include <unistd.h>
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void test_swab_even_bytes() {
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uint8_t input[] = {0x01, 0x02, 0x03, 0x04};
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uint8_t output[4];
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swab(input, output, sizeof(input));
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assert(output[0] == 0x02);
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assert(output[1] == 0x01);
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assert(output[2] == 0x04);
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assert(output[3] == 0x03);
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}
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void test_swab_odd_bytes() {
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uint8_t input[] = {0x01, 0x02, 0x03, 0x04, 0x05};
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uint8_t output[5] = {0, 0, 0, 0, 0};
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swab(input, output, sizeof(input));
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assert(output[0] == 0x02);
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assert(output[1] == 0x01);
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assert(output[2] == 0x04);
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assert(output[3] == 0x03);
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// Last byte is UB, assume unchanged?
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assert(output[4] == 0);
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}
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void test_swab_negative_bytes() {
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uint8_t input[] = {0x01, 0x02, 0x03, 0x04};
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uint8_t output[4] = {0, 0, 0, 0};
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#pragma GCC diagnostic push
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#pragma GCC diagnostic ignored "-Wstringop-overflow"
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swab(input, output, -1); // Should change nothing
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#pragma GCC diagnostic pop
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assert(output[0] == 0);
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assert(output[1] == 0);
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assert(output[2] == 0);
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assert(output[3] == 0);
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}
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void test_swab_zero_bytes() {
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uint8_t input[] = {0x01, 0x02, 0x03, 0x04};
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uint8_t output[4] = {0, 0, 0, 0};
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swab(input, output, 0); // Should change nothing
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assert(output[0] == 0);
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assert(output[1] == 0);
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assert(output[2] == 0);
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assert(output[3] == 0);
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}
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int main() {
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test_swab_even_bytes();
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test_swab_odd_bytes();
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test_swab_negative_bytes();
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test_swab_zero_bytes();
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return 0;
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}
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