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102 строки
2.6 KiB
C++
102 строки
2.6 KiB
C++
#include <iostream>
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#include <cassert>
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using namespace std;
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// Ôóíêöèÿ äëÿ ïðåäñòàâëåíèÿ nibble (4 áèò) â øåñòíàäöàòåðè÷íîé ñèñòåìå
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char nibble_to_hex(uint8_t i) {
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// Ìàññèâ öèôð â øåñòíàäöàòåðè÷íîé ñèñòåìå
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char digits[] = "0123456789abcdef";
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// Ïðîâåðêà íà êîððåêòíîñòü àðãóìåíòà
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assert(0x0 <= i && i <= 0xf);
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// Âîçâðàùàåì ñèìâîë äëÿ nibble èç ìàññèâà digits
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return digits[i];
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}
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// Ôóíêöèÿ äëÿ ïå÷àòè îäíîãî áàéòà â øåñòíàäöàòåðè÷íîé è äâîè÷íîé ôîðìå
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void print_in_hex(uint8_t byte) {
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// Ïå÷àòü â øåñòíàäöàòåðè÷íîé ôîðìå
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cout << "Hex: " << nibble_to_hex(byte >> 4) << nibble_to_hex(byte & 0xf) << endl;
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// Ïå÷àòü â äâîè÷íîé ôîðìå
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cout << "Binary: ";
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for (int i = 7; i >= 0; --i) {
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cout << ((byte >> i) & 1);
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}
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cout << endl;
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}
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const uint8_t* as_bytes(const void* data) {
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return reinterpret_cast<const uint8_t*>(data);
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};
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void print_in_hex(const void* data, size_t size) {
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const uint8_t* bytes = as_bytes(data);
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for (size_t i = 0; i < size; i++) {
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print_in_hex(bytes[i]);
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// Äëÿ óäîáñòâà ÷òåíèÿ: ïðîáåëû ìåæäó áàéòàìè, ïî 16 áàéò íà ñòðîêó.
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if ((i + 1) % 16 == 0) {
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cout << '\n';
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} else {
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cout << ' ';
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}
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}
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cout << endl;
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}
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int main() {
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// Òåñòèðîâàíèå ôóíêöèè nibble_to_hex
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//for (int i = 0; i <= 0xf; ++i) {
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//assert(nibble_to_hex(i) == nibble_to_hex(i));
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//}
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assert(nibble_to_hex(0x0) == '0');
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assert(nibble_to_hex(0x1) == '1');
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assert(nibble_to_hex(0x2) == '2');
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assert(nibble_to_hex(0x3) == '3');
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assert(nibble_to_hex(0x4) == '4');
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assert(nibble_to_hex(0x5) == '5');
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assert(nibble_to_hex(0x6) == '6');
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assert(nibble_to_hex(0x7) == '7');
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assert(nibble_to_hex(0x8) == '8');
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assert(nibble_to_hex(0x9) == '9');
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assert(nibble_to_hex(0xa) == 'a');
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assert(nibble_to_hex(0xb) == 'b');
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assert(nibble_to_hex(0xc) == 'c');
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assert(nibble_to_hex(0xd) == 'd');
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assert(nibble_to_hex(0xe) == 'e');
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assert(nibble_to_hex(0xf) == 'f');
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// Ïå÷àòü áàéòà â øåñòíàäöàòåðè÷íîé è äâîè÷íîé ôîðìå
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//uint8_t test_byte = 0x2f;
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//uint8_t test_byte = 0x0;
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//uint8_t test_byte = 0xab;
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//uint8_t test_byte = 0xff;
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uint8_t u8 = 0x42;
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uint16_t u16 = 0x42;
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uint32_t u32 = 0x42;
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std::cout << "u8 bytes: ";
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print_in_hex(&u8, sizeof(u8));
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std::cout << '\n';
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std::cout << "u16 bytes: ";
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print_in_hex(&u16, sizeof(u16));
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std::cout << '\n';
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std::cout << "u32 bytes: ";
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print_in_hex(&u32, sizeof(u32));
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std::cout << '\n';
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return 0;
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}
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