forked from EXTERNAL/bareiron
initial code dump
This commit is contained in:
p2r3
288
src/tools.c
Normal file
288
src/tools.c
Normal file
@@ -0,0 +1,288 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <arpa/inet.h>
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#include <unistd.h>
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#include "globals.h"
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#include "varnum.h"
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static uint64_t htonll (uint64_t value) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return ((uint64_t)htonl((uint32_t)(value >> 32))) |
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((uint64_t)htonl((uint32_t)(value & 0xFFFFFFFF)) << 32);
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#else
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return value;
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#endif
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}
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ssize_t writeByte (int client_fd, uint8_t byte) {
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return send(client_fd, &byte, 1, 0);
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}
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ssize_t writeUint16 (int client_fd, uint16_t num) {
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uint16_t be = htons(num);
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return send(client_fd, &be, sizeof(be), 0);
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}
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ssize_t writeUint32 (int client_fd, uint32_t num) {
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uint32_t be = htonl(num);
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return send(client_fd, &be, sizeof(be), 0);
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}
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ssize_t writeUint64 (int client_fd, uint64_t num) {
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uint64_t be = htonll(num);
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return send(client_fd, &be, sizeof(be), 0);
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}
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ssize_t writeFloat (int client_fd, float num) {
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uint32_t bits;
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memcpy(&bits, &num, sizeof(bits));
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bits = htonl(bits);
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return send(client_fd, &bits, sizeof(bits), 0);
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}
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ssize_t writeDouble (int client_fd, double num) {
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uint64_t bits;
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memcpy(&bits, &num, sizeof(bits));
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bits = htonll(bits);
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return send(client_fd, &bits, sizeof(bits), 0);
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}
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uint8_t readByte (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 1, MSG_WAITALL);
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return recv_buffer[0];
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}
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uint16_t readUint16 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 2, MSG_WAITALL);
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return ((uint16_t)recv_buffer[0] << 8) | recv_buffer[1];
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}
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uint32_t readUint32 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 4, MSG_WAITALL);
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return ((uint32_t)recv_buffer[0] << 24) |
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((uint32_t)recv_buffer[1] << 16) |
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((uint32_t)recv_buffer[2] << 8) |
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((uint32_t)recv_buffer[3]);
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}
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uint64_t readUint64 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 8, MSG_WAITALL);
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return ((uint64_t)recv_buffer[0] << 56) |
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((uint64_t)recv_buffer[1] << 48) |
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((uint64_t)recv_buffer[2] << 40) |
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((uint64_t)recv_buffer[3] << 32) |
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((uint64_t)recv_buffer[4] << 24) |
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((uint64_t)recv_buffer[5] << 16) |
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((uint64_t)recv_buffer[6] << 8) |
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((uint64_t)recv_buffer[7]);
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}
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int64_t readInt64 (int client_fd) {
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recv_count = recv(client_fd, recv_buffer, 8, MSG_WAITALL);
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return ((int64_t)recv_buffer[0] << 56) |
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((int64_t)recv_buffer[1] << 48) |
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((int64_t)recv_buffer[2] << 40) |
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((int64_t)recv_buffer[3] << 32) |
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((int64_t)recv_buffer[4] << 24) |
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((int64_t)recv_buffer[5] << 16) |
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((int64_t)recv_buffer[6] << 8) |
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((int64_t)recv_buffer[7]);
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}
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float readFloat (int client_fd) {
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uint32_t bytes = readUint32(client_fd);
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float output;
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memcpy(&output, &bytes, sizeof(output));
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return output;
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}
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double readDouble (int client_fd) {
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uint64_t bytes = readUint64(client_fd);
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double output;
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memcpy(&output, &bytes, sizeof(output));
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return output;
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}
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void readString (int client_fd) {
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uint32_t length = readVarInt(client_fd);
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recv_count = recv(client_fd, recv_buffer, length, MSG_WAITALL);
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recv_buffer[recv_count] = '\0';
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}
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int client_states[MAX_PLAYERS * 2];
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void setClientState (int client_fd, int new_state) {
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for (int i = 0; i < MAX_PLAYERS * 2; i += 2) {
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if (client_states[i] != client_fd && client_states[i] != 0) continue;
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client_states[i] = client_fd;
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client_states[i + 1] = new_state;
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}
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}
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int getClientState (int client_fd) {
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for (int i = 0; i < MAX_PLAYERS * 2; i += 2) {
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if (client_states[i] != client_fd) continue;
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return client_states[i + 1];
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}
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return STATE_NONE;
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}
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int getClientIndex (int client_fd) {
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for (int i = 0; i < MAX_PLAYERS * 2; i += 2) {
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if (client_states[i] != client_fd) continue;
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return i;
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}
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return -1;
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}
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int reservePlayerData (int client_fd, char *uuid) {
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uint64_t tmp;
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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memcpy(&tmp, player_data + i * player_data_size, 8);
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if (memcmp(&tmp, uuid, 8) == 0) {
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memcpy(player_data + i * player_data_size + 16, &client_fd, 4);
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return 0;
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}
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if (tmp == 0) {
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memcpy(player_data + i * player_data_size, uuid, 16);
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memcpy(player_data + i * player_data_size + 16, &client_fd, 4);
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player_data[i * player_data_size + 20] = 8;
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player_data[i * player_data_size + 22] = 80;
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player_data[i * player_data_size + 24] = 8;
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return 0;
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}
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}
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return 1;
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}
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void clearPlayerFD (int client_fd) {
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int tmp;
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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memcpy(&tmp, player_data + i * player_data_size + 16, 4);
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if (tmp == client_fd) {
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tmp = 0;
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memcpy(player_data + i * player_data_size + 16, &tmp, 4);
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break;
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}
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}
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}
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int savePlayerPosition (int client_fd, short x, short y, short z) {
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int tmp;
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (memcmp(&client_fd, player_data + i * player_data_size + 16, 4) == 0) {
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memcpy(player_data + i * player_data_size + 20, &x, 2);
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memcpy(player_data + i * player_data_size + 22, &y, 2);
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memcpy(player_data + i * player_data_size + 24, &z, 2);
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return 0;
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}
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}
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return 1;
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}
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int savePlayerPositionAndRotation (int client_fd, short x, short y, short z, int8_t yaw, int8_t pitch) {
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int tmp;
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (memcmp(&client_fd, player_data + i * player_data_size + 16, 4) == 0) {
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memcpy(player_data + i * player_data_size + 20, &x, 2);
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memcpy(player_data + i * player_data_size + 22, &y, 2);
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memcpy(player_data + i * player_data_size + 24, &z, 2);
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memcpy(player_data + i * player_data_size + 26, &yaw, 1);
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memcpy(player_data + i * player_data_size + 27, &pitch, 1);
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return 0;
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}
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}
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return 1;
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}
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int restorePlayerPosition (int client_fd, short *x, short *y, short *z, int8_t *yaw, int8_t *pitch) {
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int tmp;
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (memcmp(&client_fd, player_data + i * player_data_size + 16, 4) == 0) {
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memcpy(x, player_data + i * player_data_size + 20, 2);
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memcpy(y, player_data + i * player_data_size + 22, 2);
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memcpy(z, player_data + i * player_data_size + 24, 2);
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if (yaw != NULL) memcpy(yaw, player_data + i * player_data_size + 26, 1);
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if (pitch != NULL) memcpy(pitch, player_data + i * player_data_size + 27, 1);
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return 0;
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}
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}
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return 1;
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}
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uint8_t *getPlayerInventory (int client_fd) {
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int tmp;
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for (int i = 0; i < MAX_PLAYERS; i ++) {
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if (memcmp(&client_fd, player_data + i * player_data_size + 16, 4) == 0) {
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return player_data + i * player_data_size + 29;
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}
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}
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return NULL;
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}
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uint8_t serverSlotToClientSlot (uint8_t slot) {
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if (slot >= 0 && slot <= 9) return slot + 36;
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if (slot == 40) return 45;
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if (slot >= 36 && slot <= 39) return 3 - (slot - 36) + 5;
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}
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uint8_t clientSlotToServerSlot (uint8_t slot) {
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if (slot >= 36 && slot <= 44) return slot - 36;
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if (slot == 45) return 40;
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if (slot >= 5 && slot <= 8) return 4 - (slot - 5) + 36;
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return 255;
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}
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uint8_t getBlockChange (short x, short y, short z) {
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short tmp;
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for (int i = 0; i < block_changes_count * 7; i += 7) {
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if (block_changes[i + 6] == 0xFF) continue;
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memcpy(&tmp, block_changes + i, 2);
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if (x != tmp) continue;
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memcpy(&tmp, block_changes + i + 2, 2);
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if (y != tmp) continue;
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memcpy(&tmp, block_changes + i + 4, 2);
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if (z != tmp) continue;
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return block_changes[i + 6];
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}
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return 0xFF;
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}
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void makeBlockChange (short x, short y, short z, uint8_t block) {
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short tmp;
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for (int i = 0; i < block_changes_count * 7; i += 7) {
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memcpy(&tmp, block_changes + i, 2);
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if (x != tmp) continue;
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memcpy(&tmp, block_changes + i + 2, 2);
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if (y != tmp) continue;
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memcpy(&tmp, block_changes + i + 4, 2);
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if (z != tmp) continue;
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block_changes[i + 6] = block;
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return;
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}
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int end = block_changes_count * 7;
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memcpy(block_changes + end, &x, 2);
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memcpy(block_changes + end + 2, &y, 2);
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memcpy(block_changes + end + 4, &z, 2);
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block_changes[end + 6] = block;
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block_changes_count ++;
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}
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