Imanol-Mikel Barba Sabariego / mcplayerstat · Commits

Commit 4f07b8766a5497ad8476be6b6ebb7a8405d1adc0

Authored by Imanol-Mikel Barba Sabariego
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Showing 1 changed file with 110 additions and 0 deletions
mcplayerstat.c 0 → 100644
  View file @4f07b87
  1 +++ a/mcplayerstat.c
  1 +#include <stdio.h>
  2 +#include <unistd.h>
  3 +#include <sys/mman.h>
  4 +#include <sys/stat.h>
  5 +#include <fcntl.h>
  6 +#include <stdint.h>
  7 +#include <byteswap.h>
  8 +
  9 +#include "nbt.h"
  10 +
  11 +double convertDouble(uint64_t data) {
  12 + double d = 0;
  13 + uint64_t swapped = __bswap_64(data);
  14 + memcpy(&d,&swapped,sizeof(uint64_t));
  15 + return d;
  16 +}
  17 +
  18 +void printInventory(TagList *inv) {
  19 + for(int j = 0; j < inv->size; ++j) {
  20 + TagCompound item = *(TagCompound*)inv->list[j].payload;
  21 + uint8_t slot = 0;
  22 + char* id;
  23 + uint8_t count = 0;
  24 + for(int k = 0; k < item.numTags; ++k) {
  25 + Tag attr = item.list[k];
  26 + if(!strncmp(attr.name,"Slot",attr.nameLength)) {
  27 + slot = *((uint8_t*)attr.payload);
  28 + } else if(!strncmp(attr.name,"id",attr.nameLength)) {
  29 + id = (char*)attr.payload;
  30 + } else if(!strncmp(attr.name,"Count",attr.nameLength)) {
  31 + count = *((uint8_t*)attr.payload);
  32 + }
  33 + }
  34 + printf("\t- [%u] %ux %s\n",slot,count,id);
  35 + }
  36 +}
  37 +
  38 +int parseMCPlayerFile(const char* filename) {
  39 + struct stat sb;
  40 + unsigned int pos = 0;
  41 +
  42 + int fd = open(filename,O_RDONLY);
  43 + if(fd == -1) {
  44 + perror("Can't open file");
  45 + return 3;
  46 + }
  47 + fstat(fd, &sb);
  48 +
  49 + void* mappedFile = mmap(NULL,sb.st_size,PROT_READ,MAP_PRIVATE,fd,0);
  50 +
  51 + // int playerGameType
  52 + // int XpLevel
  53 + // list(compound) Inventory
  54 + // list(compound) EnderItems
  55 + // list(float) Pos
  56 +
  57 + Tag t;
  58 + pos = parseTag((mappedFile + pos),&t);
  59 + if(pos != sb.st_size) {
  60 + fprintf(stderr,"Didn't reach end of NBT file\n");
  61 + return 4;
  62 + }
  63 +
  64 + TagCompound root = *(TagCompound*) t.payload;
  65 + for(int i = 0; i < root.numTags; ++i) {
  66 + Tag node = root.list[i];
  67 + if(node.type == TAG_INT) {
  68 + if(!strncmp(node.name,"playerGameType",node.nameLength)) {
  69 + int playerGameType = __bswap_32(*((uint32_t*)node.payload));
  70 + printf("playerGameType: %s\n",(playerGameType == 0 ? "Survival" : (playerGameType == 1 ? "Creative" : (playerGameType == 2 ? "Adventure" : (playerGameType == 3 ? "Spectator" : "UNKNOWN")))));
  71 + } else if (!strncmp(node.name,"XpLevel",node.nameLength)) {
  72 + int xpLevel = __bswap_32(*((uint32_t*)node.payload));
  73 + printf("XpLevel: %u\n",xpLevel);
  74 + }
  75 + } else if(node.type == TAG_LIST) {
  76 + TagList* l = (TagList*)node.payload;
  77 + if(!strncmp(node.name,"Inventory",node.nameLength)) {
  78 + printf("Inventory:\n");
  79 + printInventory(l);
  80 + } else if (!strncmp(node.name,"EnderItems",node.nameLength)) {
  81 + printf("Ender Inventory:\n");
  82 + printInventory(l);
  83 + } else if (!strncmp(node.name,"Pos",node.nameLength)) {
  84 + double x = convertDouble((*(uint64_t*)l->list[0].payload));
  85 + double y = convertDouble((*(uint64_t*)l->list[1].payload));
  86 + double z = convertDouble((*(uint64_t*)l->list[2].payload));
  87 + printf("Pos: (x: %f,y: %f,z: %f)\n",x,y,z);
  88 + }
  89 + }
  90 + }
  91 +
  92 + destroyTag(&t);
  93 + munmap(mappedFile,sb.st_size);
  94 + close(fd);
  95 + return 0;
  96 +}
  97 +
  98 +int main(int argc, char** argv) {
  99 + if(argc != 2) {
  100 + fprintf(stderr,"No file specified\n");
  101 + return 1;
  102 + }
  103 +
  104 + if(access(argv[1],R_OK) == -1) {
  105 + perror("Can't access file");
  106 + return 2;
  107 + }
  108 +
  109 + return parseMCPlayerFile(argv[1]);
  110 +}
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