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@@ -25,7 +25,7 @@ struct MD5File {
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};
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struct FileList {
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MD5File basic[4]; ///< grf files that always have to be loaded
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MD5File basic[2]; ///< grf files that always have to be loaded
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MD5File landscape[3]; ///< landscape specific grf files
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};
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@@ -53,7 +53,7 @@ static const SpriteID * const _halftile_
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};
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static uint LoadGrfFile(const char* filename, uint load_index, int file_index)
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static uint LoadGrfFile(const char *filename, uint load_index, int file_index)
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{
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uint load_index_org = load_index;
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uint sprite_id = 0;
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@@ -110,17 +110,12 @@ static void LoadGrfIndexed(const char* f
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}
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/* Check that the supplied MD5 hash matches that stored for the supplied filename */
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static bool CheckMD5Digest(const MD5File file, md5_byte_t *digest, bool warn)
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{
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if (memcmp(file.hash, digest, sizeof(file.hash)) == 0) return true;
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if (warn) fprintf(stderr, "MD5 of %s is ****INCORRECT**** - File Corrupt.\n", file.filename);
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return false;
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}
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/* Calculate and check the MD5 hash of the supplied filename.
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* returns true if the checksum is correct */
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static bool FileMD5(const MD5File file, bool warn)
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/**
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* Calculate and check the MD5 hash of the supplied filename.
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* @param file filename and expected MD5 hash for the given filename.
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* @return true if the checksum is correct.
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*/
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static bool FileMD5(const MD5File file)
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{
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size_t size;
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FILE *f = FioFOpenFile(file.filename, "rb", DATA_DIR, &size);
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@@ -137,53 +132,38 @@ static bool FileMD5(const MD5File file,
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md5_append(&filemd5state, buffer, len);
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}
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if (ferror(f) && warn) ShowInfoF("Error Reading from %s \n", file.filename);
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FioFCloseFile(f);
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md5_finish(&filemd5state, digest);
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return CheckMD5Digest(file, digest, warn);
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return memcmp(file.hash, digest, sizeof(file.hash)) == 0;
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} else { // file not found
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return false;
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}
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}
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/* Checks, if either the Windows files exist (TRG1R.GRF) or the DOS files (TRG1.GRF)
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* by comparing the MD5 checksums of the files. _use_dos_palette is set accordingly.
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* If neither are found, Windows palette is assumed.
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*
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* (Note: Also checks sample.cat for corruption) */
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void CheckExternalFiles()
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/**
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* Determine the palette that has to be used.
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* - forced DOS palette via command line -> leave it that way
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* - all Windows files present -> Windows palette
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* - all DOS files present -> DOS palette
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* - no Windows files present and any DOS file present -> DOS palette
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* - otherwise -> Windows palette
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*/
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static void DeterminePalette()
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{
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uint i;
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/* count of files from this version */
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if (_use_dos_palette) return;
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/* Count of files from the different versions. */
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uint dos = 0;
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uint win = 0;
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for (i = 0; i < 2; i++) if (FileMD5(files_dos.basic[i], true)) dos++;
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for (i = 0; i < 3; i++) if (FileMD5(files_dos.landscape[i], true)) dos++;
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for (i = 0; i < 2; i++) if (FileMD5(files_win.basic[i], true)) win++;
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for (i = 0; i < 3; i++) if (FileMD5(files_win.landscape[i], true)) win++;
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if (!FileMD5(sample_cat_win, false) && !FileMD5(sample_cat_dos, false))
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ShowInfo("Your 'sample.cat' file is corrupted or missing!");
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for (uint i = 0; i < lengthof(files_dos.basic); i++) if (FioCheckFileExists(files_dos.basic[i].filename)) dos++;
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for (uint i = 0; i < lengthof(files_dos.landscape); i++) if (FioCheckFileExists(files_dos.landscape[i].filename)) dos++;
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for (i = 0; i < lengthof(files_openttd); i++) {
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if (!FileMD5(files_openttd[i], false)) {
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ShowInfoF("Your '%s' file is corrupted or missing!", files_openttd[i].filename);
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}
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}
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for (uint i = 0; i < lengthof(files_win.basic); i++) if (FioCheckFileExists(files_win.basic[i].filename)) win++;
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for (uint i = 0; i < lengthof(files_win.landscape); i++) if (FioCheckFileExists(files_win.landscape[i].filename)) win++;
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/*
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* forced DOS palette via command line -> leave it that way
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* all Windows files present -> Windows palette
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* all DOS files present -> DOS palette
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* no Windows files present and any DOS file present -> DOS palette
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* otherwise -> Windows palette
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*/
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if (_use_dos_palette) {
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return;
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} else if (win == 5) {
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if (win == 5) {
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_use_dos_palette = false;
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} else if (dos == 5 || (win == 0 && dos > 0)) {
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_use_dos_palette = true;
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@@ -192,6 +172,46 @@ void CheckExternalFiles()
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}
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}
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/**
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* Checks whether the MD5 checksums of the files are correct.
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*
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* @note Also checks sample.cat and other required non-NewGRF GRFs for corruption.
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*/
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void CheckExternalFiles()
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{
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DeterminePalette();
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static const size_t ERROR_MESSAGE_LENGTH = 128;
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const FileList *files = _use_dos_palette ? &files_dos : &files_win;
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char error_msg[ERROR_MESSAGE_LENGTH * (lengthof(files->basic) + lengthof(files->landscape) + lengthof(files_openttd) + 1)];
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error_msg[0] = '\0';
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char *add_pos = error_msg;
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for (uint i = 0; i < lengthof(files->basic); i++) {
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if (!FileMD5(files->basic[i])) {
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add_pos += snprintf(add_pos, ERROR_MESSAGE_LENGTH, "Your '%s' file is corrupted or missing! You can find '%s' on your Transport Tycoon Deluxe CD-ROM.\n", files->basic[i].filename, files->basic[i].filename);
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}
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}
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for (uint i = 0; i < lengthof(files->landscape); i++) {
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if (!FileMD5(files->landscape[i])) {
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add_pos += snprintf(add_pos, ERROR_MESSAGE_LENGTH, "Your '%s' file is corrupted or missing! You can find '%s' on your Transport Tycoon Deluxe CD-ROM.\n", files->landscape[i].filename, files->landscape[i].filename);
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}
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}
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if (!FileMD5(sample_cat_win) && !FileMD5(sample_cat_dos)) {
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add_pos += snprintf(add_pos, ERROR_MESSAGE_LENGTH, "Your 'sample.cat' file is corrupted or missing! You can find 'sample.cat' on your Transport Tycoon Deluxe CD-ROM.\n");
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}
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for (uint i = 0; i < lengthof(files_openttd); i++) {
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if (!FileMD5(files_openttd[i])) {
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add_pos += snprintf(add_pos, ERROR_MESSAGE_LENGTH, "Your '%s' file is corrupted or missing! The file was part of your installation.\n", files_openttd[i].filename);
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}
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}
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if (add_pos != error_msg) ShowInfoF(error_msg);
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}
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static const SpriteID trg1idx[] = {
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0, 1, ///< Mouse cursor, ZZZ
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@@ -332,7 +352,7 @@ static const SpriteID _openttd_grf_index
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static void LoadSpriteTables()
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{
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const FileList* files = _use_dos_palette ? &files_dos : &files_win;
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const FileList *files = _use_dos_palette ? &files_dos : &files_win;
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uint load_index;
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uint i = FIRST_GRF_SLOT;
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@@ -340,13 +360,20 @@ static void LoadSpriteTables()
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DupSprite( 2, 130); // non-breaking space medium
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DupSprite(226, 354); // non-breaking space tiny
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DupSprite(450, 578); // non-breaking space large
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load_index = 4793;
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for (uint j = 1; files->basic[j].filename != NULL; j++) {
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load_index += LoadGrfFile(files->basic[j].filename, load_index, i++);
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}
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/*
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* The second basic file always starts at the given location and does
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* contain a different amount of sprites depending on the "type"; DOS
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* has a few sprites less. However, we do not care about those missing
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* sprites as they are not shown anyway (logos in intro game).
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*/
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LoadGrfFile(files->basic[1].filename, 4793, i++);
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/* Load additional sprites for climates other than temperate */
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/*
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* Load additional sprites for climates other than temperate.
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* This overwrites some of the temperate sprites, such as foundations
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* and the ground sprites.
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*/
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if (_opt.landscape != LT_TEMPERATE) {
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LoadGrfIndexed(
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files->landscape[_opt.landscape - 1].filename,
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@@ -355,7 +382,8 @@ static void LoadSpriteTables()
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);
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}
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assert(load_index == SPR_SIGNALS_BASE);
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/* Start loading the extra, non-TTD, base GRFs for the given index. */
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load_index = SPR_SIGNALS_BASE;
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load_index += LoadGrfFile("nsignalsw.grf", load_index, i++);
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assert(load_index == SPR_CANALS_BASE);
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