jadeite/game_payload/src/tx.c

#include <windows.h>
#include <stdio.h>

#include <crc32.h>
#include <msg.h>
#include <pe.h>
#include <main.h>
#include <config.h>

#include <tx.h>

void tx_table_file(struct game_data *game, wchar_t *buf) {
    // Get temp directory path
    wchar_t tempDir[MAX_PATH];
    GetTempPathW(MAX_PATH, tempDir);

    // Memorymap the base module
    HANDLE baseFile = CreateFileA(game->base_module_name, FILE_READ_ACCESS, FILE_SHARE_READ, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
    if (!baseFile) {
        msg_err_a("Could not open file: %s", game->base_module_name);
    }

    HANDLE hBaseMap = CreateFileMappingA(baseFile, NULL, PAGE_READONLY, 0, 0, NULL);
    char *baseMap = MapViewOfFile(hBaseMap, FILE_MAP_READ, 0, 0, 0);
    if (!baseMap) {
        msg_err_a("Could not create file mapping for %s", game->base_module_name);
    }

    // Checksum the TXS section
    IMAGE_SECTION_HEADER *txsSection = pe_find_section(baseMap, game->txs_section_name);
    if (!txsSection) {
        msg_err_a("Could not find %s in %s. " ISSUE_SUFFIX, game->txs_section_name, game->base_module_name);
    }

    uint32_t txsChecksum = crc32c(0, baseMap + txsSection->PointerToRawData, txsSection->SizeOfRawData);

    // Format the path
    wsprintfW(buf, L"%sjadeite\\" JADEITE_VERSION "\\%hs.%x.dat", tempDir, game->base_module_name, txsChecksum);

    // Cleanup
    UnmapViewOfFile(baseMap);
    CloseHandle(hBaseMap);
    CloseHandle(baseFile);
}