#include "encoder.h"
#include "encoderlib.h"
void encode(int N, int M[]) {
if (N <= 8) {
for (int i = 0; i < N; i++) {
send((i << 5) | (M[i] & 0xf));
send((i << 5) | (1 << 4) | ((M[i] >> 4) & 0xf));
}
} else if (N <= 16) {
for (int i = 0; i < N; i++) {
send((i << 4) + (M[i] & 0xf));
send((i << 4) + ((M[i] >> 4) & 0xf));
send((i << 4) + ((M[i] >> 4) & 0xf));
}
} else {
for (int i = 0; i < N && i < 32; i++) {
for (int j = 0, k = 1; j < 8; j++, k <<= 1) {
if (N > 32 && i + 32 < N) {
if ((M[i] & k) && (M[i + 32] & k)) {
send(i * 8 + j);
} else if (M[i + 32] & k) {
send(i * 8 + j);
send(i * 8 + j);
send(i * 8 + j);
} else if (M[i] & k) {
send(i * 8 + j);
send(i * 8 + j);
}
} else {
if (M[i] & k) {
send(i * 8 + j);
}
}
}
}
}
}
#include "decoder.h"
#include "decoderlib.h"
void decode(int N, int L, int X[]) {
int message[64] = {0};
if (N <= 8) {
for (int i = 0; i < L; i++) {
message[X[i] >> 5] |= (X[i] & 0xf) << (4 * ((X[i] >> 4) & 1));
}
} else if (N <= 16) {
int message_box[16][16];
for (int i = 0; i < 16; i++)
for (int j = 0; j < 16; j++)
message_box[i][j] = 0;
for (int i = 0; i < L; i++) {
message_box[(X[i] >> 4) & 0xf][X[i] & 0xf]++;
}
for (int i = 0; i < 16; i++) {
for (int j = 0; j < 16; j++) {
switch (message_box[i][j]) {
case 1:
message[i] |= j;
break;
case 2:
message[i] |= (j << 4);
break;
case 3:
message[i] |= (j << 4) | j;
break;
}
}
}
} else {
int bitCount[256] = {0};
for (int i = 0; i < L; i++) {
bitCount[X[i]]++;
}
for (int i = 0; i < 256; i++) {
if (N > 32) {
switch (bitCount[i]) {
case 2:
message[i / 8] |= (1 << (i % 8));
break;
case 3:
message[i / 8 + 32] |= 1 << (i % 8);
break;
case 1:
message[i / 8 + 32] |= 1 << (i % 8);
message[i / 8] |= 1 << (i % 8);
break;
}
} else if (bitCount[i]) {
message[i / 8] |= (1 << (i % 8));
}
}
}
for (int i = 0; i < N; i++) {
output(message[i]);
}
}
