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/* $Id$ */
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#include "stdafx.h"
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#include "openttd.h"
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#include "functions.h"
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#include "macros.h"
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#include "debug.h"
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#include "variables.h"
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#include "string.h"
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#include "saveload.h"
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#include "md5.h"
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#include "network_data.h"
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#include "newgrf.h"
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#include "newgrf_config.h"
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#include "fileio.h"
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#include "fios.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#ifdef WIN32
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# include <io.h>
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#else
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# include <unistd.h>
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# include <dirent.h>
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#endif /* WIN32 */
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GRFConfig *_all_grfs;
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GRFConfig *_grfconfig;
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GRFConfig *_grfconfig_newgame;
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GRFConfig *_grfconfig_static;
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/* Calculate the MD5 Sum for a GRF */
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static bool CalcGRFMD5Sum(GRFConfig *config)
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{
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FILE *f;
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char filename[MAX_PATH];
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md5_state_t md5state;
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md5_byte_t buffer[1024];
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size_t len;
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/* open the file */
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snprintf(filename, lengthof(filename), "%s%s", _paths.data_dir, config->filename);
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f = fopen(filename, "rb");
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if (f == NULL) return false;
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/* calculate md5sum */
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md5_init(&md5state);
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while ((len = fread(buffer, 1, sizeof(buffer), f)) != 0) {
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md5_append(&md5state, buffer, len);
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}
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md5_finish(&md5state, config->md5sum);
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fclose(f);
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return true;
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}
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/* Find the GRFID and calculate the md5sum */
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bool FillGRFDetails(GRFConfig *config, bool is_static)
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{
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if (!FioCheckFileExists(config->filename)) {
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SETBIT(config->flags, GCF_NOT_FOUND);
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return false;
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}
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/* Find and load the Action 8 information */
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/* 62 is the last file slot before sample.cat.
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* Should perhaps be some "don't care" value */
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LoadNewGRFFile(config, 62, is_static ? GLS_SAFETYSCAN : GLS_FILESCAN);
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/* GCF_UNSAFE is set if GLS_SAFETYSCAN finds unsafe actions */
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if (HASBIT(config->flags, GCF_UNSAFE)) return false;
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/* Skip if the grfid is 0 (not read) or 0xFFFFFFFF (ttdp system grf) */
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if (config->grfid == 0 || config->grfid == 0xFFFFFFFF) return false;
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return CalcGRFMD5Sum(config);
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}
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void ClearGRFConfig(GRFConfig **config)
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{
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/* GCF_COPY as in NOT strdupped/alloced the filename, name and info */
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if (!HASBIT((*config)->flags, GCF_COPY)) {
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free((*config)->filename);
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free((*config)->name);
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free((*config)->info);
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}
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free(*config);
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*config = NULL;
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}
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/* Clear a GRF Config list */
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void ClearGRFConfigList(GRFConfig **config)
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{
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GRFConfig *c, *next;
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for (c = *config; c != NULL; c = next) {
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next = c->next;
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ClearGRFConfig(&c);
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}
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*config = NULL;
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}
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/** Copy a GRF Config list
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* @param dst pointer to destination list
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* @param srt pointer to source list values
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* @return pointer to the last value added to the destination list */
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GRFConfig **CopyGRFConfigList(GRFConfig **dst, const GRFConfig *src)
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{
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GRFConfig *c;
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/* Clear destination as it will be overwritten */
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ClearGRFConfigList(dst);
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for (; src != NULL; src = src->next) {
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c = calloc(1, sizeof(*c));
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*c = *src;
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if (src->filename != NULL) c->filename = strdup(src->filename);
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if (src->name != NULL) c->name = strdup(src->name);
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if (src->info != NULL) c->info = strdup(src->info);
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*dst = c;
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dst = &c->next;
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}
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return dst;
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}
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/* Reset the current GRF Config to either blank or newgame settings */
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void ResetGRFConfig(bool defaults)
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{
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GRFConfig **c = &_grfconfig;
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if (defaults) c = CopyGRFConfigList(c, _grfconfig_newgame);
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CopyGRFConfigList(c, _grfconfig_static);
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}
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/* Check if all GRFs in the GRF Config can be loaded */
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bool IsGoodGRFConfigList(void)
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{
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bool res = true;
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GRFConfig *c;
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for (c = _grfconfig; c != NULL; c = c->next) {
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const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
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if (f == NULL) {
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char buf[512], *p = buf;
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uint i;
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p += snprintf(p, lastof(buf) - p, "Couldn't find NewGRF %08X (%s) checksum ", BSWAP32(c->grfid), c->filename);
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for (i = 0; i < lengthof(c->md5sum); i++) {
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p += snprintf(p, lastof(buf) - p, "%02X", c->md5sum[i]);
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}
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ShowInfo(buf);
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res = false;
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} else {
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DEBUG(grf, 1, "Loading GRF %08X from '%s'", BSWAP32(c->grfid), f->filename);
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/* The filename could be the filename as in the savegame. As we need
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* to load the GRF here, we need the correct filename, so overwrite that
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* in any case and set the name and info when it is not set already.
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* When the GCF_COPY flag is set, it is certain that the filename is
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* already a local one, so there is no need to replace it. */
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if (!HASBIT(c->flags, GCF_COPY)) {
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free(c->filename);
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c->filename = strdup(f->filename);
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if (c->name == NULL) c->name = strdup(f->name);
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if (c->info == NULL) c->info = strdup(f->info);
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}
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}
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}
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return res;
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}
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extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb);
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/* Scan a path for NewGRFs */
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static uint ScanPath(const char *path)
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{
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uint num = 0;
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struct stat sb;
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struct dirent *dirent;
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DIR *dir;
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GRFConfig *c;
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if ((dir = opendir(path)) == NULL) return 0;
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while ((dirent = readdir(dir)) != NULL) {
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const char *d_name = FS2OTTD(dirent->d_name);
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char filename[MAX_PATH];
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if (!FiosIsValidFile(path, dirent, &sb)) continue;
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snprintf(filename, lengthof(filename), "%s" PATHSEP "%s", path, d_name);
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if (sb.st_mode & S_IFDIR) {
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/* Directory */
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if (strcmp(d_name, ".") == 0 || strcmp(d_name, "..") == 0) continue;
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num += ScanPath(filename);
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} else if (sb.st_mode & S_IFREG) {
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/* File */
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char *ext = strrchr(filename, '.');
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char *file = filename + strlen(_paths.data_dir) + 1; // Crop base path
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/* If no extension or extension isn't .grf, skip the file */
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if (ext == NULL) continue;
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if (strcasecmp(ext, ".grf") != 0) continue;
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c = calloc(1, sizeof(*c));
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c->filename = strdup(file);
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if (FillGRFDetails(c, false)) {
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if (_all_grfs == NULL) {
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_all_grfs = c;
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} else {
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/* Insert file into list at a position determined by its
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* name, so the list is sorted as we go along */
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GRFConfig **pd, *d;
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for (pd = &_all_grfs; (d = *pd) != NULL; pd = &d->next) {
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if (strcasecmp(c->name, d->name) <= 0) break;
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}
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c->next = d;
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*pd = c;
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}
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num++;
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} else {
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/* File couldn't be opened, or is either not a NewGRF or is a
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* 'system' NewGRF, so forget about it. */
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free(c->filename);
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free(c->name);
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free(c->info);
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free(c);
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}
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}
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}
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closedir(dir);
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return num;
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}
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/* Scan for all NewGRFs */
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void ScanNewGRFFiles(void)
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{
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uint num;
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ClearGRFConfigList(&_all_grfs);
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DEBUG(grf, 1, "Scanning for NewGRFs");
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num = ScanPath(_paths.data_dir);
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DEBUG(grf, 1, "Scan complete, found %d files", num);
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}
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/* Find a NewGRF in the scanned list */
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const GRFConfig *FindGRFConfig(uint32 grfid, uint8 *md5sum)
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{
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GRFConfig *c;
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static const uint8 blanksum[sizeof(c->md5sum)] = { 0 };
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for (c = _all_grfs; c != NULL; c = c->next) {
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if (c->grfid == grfid) {
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if (memcmp(blanksum, c->md5sum, sizeof(c->md5sum)) == 0) CalcGRFMD5Sum(c);
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if (memcmp(md5sum, c->md5sum, sizeof(c->md5sum)) == 0) return c;
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}
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}
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return NULL;
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}
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/** Structure for UnknownGRFs; this is a lightweight variant of GRFConfig */
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typedef struct UnknownGRF UnknownGRF;
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struct UnknownGRF {
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UnknownGRF *next;
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uint32 grfid;
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uint8 md5sum[16];
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char name[NETWORK_GRF_NAME_LENGTH];
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};
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/**
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* Finds the name of a NewGRF in the list of names for unknown GRFs. An
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* unknown GRF is a GRF where the .grf is not found during scanning.
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*
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* The names are resolved via UDP calls to servers that should know the name,
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* though the replies may not come. This leaves "<Unknown>" as name, though
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* that shouldn't matter _very_ much as they need GRF crawler or so to look
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* up the GRF anyway and that works better with the GRF ID.
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*
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* @param grfid the GRF ID part of the 'unique' GRF identifier
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* @param md5sum the MD5 checksum part of the 'unique' GRF identifier
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* @param create whether to create a new GRFConfig if the GRFConfig did not
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* exist in the fake list of GRFConfigs.
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* @return the GRFConfig with the given GRF ID and MD5 checksum or NULL when
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* it does not exist and create is false. This value must NEVER be
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* freed by the caller.
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*/
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char *FindUnknownGRFName(uint32 grfid, uint8 *md5sum, bool create)
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{
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UnknownGRF *grf;
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static UnknownGRF *unknown_grfs = NULL;
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for (grf = unknown_grfs; grf != NULL; grf = grf->next) {
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if (grf->grfid == grfid) {
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if (memcmp(md5sum, grf->md5sum, sizeof(grf->md5sum)) == 0) return grf->name;
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}
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}
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if (!create) return NULL;
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grf = calloc(1, sizeof(*grf));
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grf->grfid = grfid;
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grf->next = unknown_grfs;
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ttd_strlcpy(grf->name, UNKNOWN_GRF_NAME_PLACEHOLDER, sizeof(grf->name));
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memcpy(grf->md5sum, md5sum, sizeof(grf->md5sum));
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unknown_grfs = grf;
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return grf->name;
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}
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/* Retrieve a NewGRF from the current config by its grfid */
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GRFConfig *GetGRFConfig(uint32 grfid)
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{
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GRFConfig *c;
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for (c = _grfconfig; c != NULL; c = c->next) {
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if (c->grfid == grfid) return c;
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}
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return NULL;
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}
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/* Build a space separated list of parameters, and terminate */
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char *GRFBuildParamList(char *dst, const GRFConfig *c, const char *last)
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{
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uint i;
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/* Return an empty string if there are no parameters */
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if (c->num_params == 0) return strecpy(dst, "", last);
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for (i = 0; i < c->num_params; i++) {
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if (i > 0) dst = strecpy(dst, " ", last);
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dst += snprintf(dst, last - dst, "%d", c->param[i]);
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}
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return dst;
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}
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static const SaveLoad _grfconfig_desc[] = {
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SLE_STR(GRFConfig, filename, SLE_STR, 0x40),
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SLE_VAR(GRFConfig, grfid, SLE_UINT32),
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SLE_ARR(GRFConfig, md5sum, SLE_UINT8, 16),
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SLE_ARR(GRFConfig, param, SLE_UINT32, 0x80),
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SLE_VAR(GRFConfig, num_params, SLE_UINT8),
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SLE_END()
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};
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static void Save_NGRF(void)
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{
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GRFConfig *c;
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int index = 0;
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|
|
for (c = _grfconfig; c != NULL; c = c->next) {
|
|
|
|
if (HASBIT(c->flags, GCF_STATIC)) continue;
|
|
|
|
SlSetArrayIndex(index++);
|
|
|
|
SlObject(c, _grfconfig_desc);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
static void Load_NGRF(void)
|
|
|
|
{
|
|
|
|
GRFConfig *first = NULL;
|
|
|
|
GRFConfig **last = &first;
|
|
|
|
|
|
|
|
while (SlIterateArray() != -1) {
|
|
|
|
GRFConfig *c = calloc(1, sizeof(*c));
|
|
|
|
SlObject(c, _grfconfig_desc);
|
|
|
|
|
|
|
|
/* Append our configuration to the list */
|
|
|
|
*last = c;
|
|
|
|
last = &c->next;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Append static NewGRF configuration */
|
|
|
|
CopyGRFConfigList(last, _grfconfig_static);
|
|
|
|
|
|
|
|
ClearGRFConfigList(&_grfconfig);
|
|
|
|
_grfconfig = first;
|
|
|
|
}
|
|
|
|
|
|
|
|
const ChunkHandler _newgrf_chunk_handlers[] = {
|
|
|
|
{ 'NGRF', Save_NGRF, Load_NGRF, CH_ARRAY | CH_LAST }
|
|
|
|
};
|
|
|
|
|
|
|
|
|