peter1138@5228: /* $Id$ */
peter1138@5228: 
peter1138@5228: #include "stdafx.h"
peter1138@5228: #include "openttd.h"
peter1138@5228: #include "functions.h"
peter1138@5228: #include "macros.h"
peter1138@5228: #include "debug.h"
peter1138@5228: #include "variables.h"
peter1138@5228: #include "saveload.h"
peter1138@5228: #include "md5.h"
peter1138@5228: #include "newgrf.h"
peter1138@5228: #include "newgrf_config.h"
peter1138@5228: 
peter1138@5228: #include "fileio.h"
peter1138@5228: #include "fios.h"
peter1138@5228: #include <sys/types.h>
peter1138@5228: #include <sys/stat.h>
peter1138@5228: 
peter1138@5228: #ifdef WIN32
peter1138@5228: # include <io.h>
peter1138@5228: #else
peter1138@5228: # include <unistd.h>
peter1138@5228: # include <dirent.h>
peter1138@5228: #endif /* WIN32 */
peter1138@5228: 
peter1138@5228: 
peter1138@5228: GRFConfig *_all_grfs;
peter1138@5228: GRFConfig *_grfconfig;
peter1138@5228: GRFConfig *_grfconfig_newgame;
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Calculate the MD5 Sum for a GRF */
peter1138@5228: static bool CalcGRFMD5Sum(GRFConfig *config)
peter1138@5228: {
peter1138@5228: 	FILE *f;
peter1138@5228: 	char filename[MAX_PATH];
peter1138@5228: 	md5_state_t md5state;
peter1138@5228: 	md5_byte_t buffer[1024];
peter1138@5228: 	size_t len;
peter1138@5228: 
peter1138@5228: 	/* open the file */
peter1138@5228: 	snprintf(filename, lengthof(filename), "%s%s", _path.data_dir, config->filename);
peter1138@5228: 	f = fopen(filename, "rb");
peter1138@5228: 	if (f == NULL) return false;
peter1138@5228: 
peter1138@5228: 	/* calculate md5sum */
peter1138@5228: 	md5_init(&md5state);
peter1138@5228: 	while ((len = fread(buffer, 1, sizeof(buffer), f)) != 0) {
peter1138@5228: 		md5_append(&md5state, buffer, len);
peter1138@5228: 	}
peter1138@5228: 	md5_finish(&md5state, config->md5sum);
peter1138@5228: 
peter1138@5228: 	fclose(f);
peter1138@5228: 
peter1138@5228: 	return true;
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Find the GRFID and calculate the md5sum */
peter1138@5228: bool FillGRFDetails(GRFConfig *config)
peter1138@5228: {
peter1138@5228: 	if (!FioCheckFileExists(config->filename)) {
peter1138@5228: 		SETBIT(config->flags, GCF_NOT_FOUND);
peter1138@5228: 		return false;
peter1138@5228: 	}
peter1138@5228: 
peter1138@5228: 	/* Find and load the Action 8 information */
peter1138@5228: 	/* 62 is the last file slot before sample.cat.
peter1138@5228: 	 * Should perhaps be some "don't care" value */
peter1138@5228: 	LoadNewGRFFile(config, 62, GLS_FILESCAN);
peter1138@5228: 
peter1138@5228: 	/* Skip if the grfid is 0 (not read) or 0xFFFFFFFF (ttdp system grf) */
peter1138@5228: 	if (config->grfid == 0 || config->grfid == 0xFFFFFFFF) return false;
peter1138@5228: 
peter1138@5228: 	return CalcGRFMD5Sum(config);
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Clear a GRF Config list */
peter1138@5228: void ClearGRFConfigList(GRFConfig *config)
peter1138@5228: {
peter1138@5228: 	GRFConfig *c, *next;
peter1138@5228: 	for (c = config; c != NULL; c = next) {
peter1138@5228: 		next = c->next;
peter1138@5228: 		free(c->filename);
peter1138@5228: 		free(c->name);
peter1138@5228: 		free(c->info);
peter1138@5228: 		free(c);
peter1138@5228: 	}
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Copy a GRF Config list */
peter1138@5228: static void CopyGRFConfigList(GRFConfig **dst, GRFConfig *src)
peter1138@5228: {
peter1138@5228: 	GRFConfig *c;
peter1138@5228: 
peter1138@5228: 	for (; src != NULL; src = src->next) {
peter1138@5228: 		c = calloc(1, sizeof(*c));
peter1138@5228: 		*c = *src;
peter1138@5228: 		c->filename = strdup(src->filename);
peter1138@5228: 		if (src->name != NULL) c->name = strdup(src->name);
peter1138@5228: 		if (src->info != NULL) c->info = strdup(src->info);
peter1138@5228: 
peter1138@5228: 		*dst = c;
peter1138@5228: 		dst = &c->next;
peter1138@5228: 	}
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Reset the current GRF Config to either blank or newgame settings */
peter1138@5228: void ResetGRFConfig(bool defaults)
peter1138@5228: {
peter1138@5228: 	ClearGRFConfigList(_grfconfig);
peter1138@5228: 	_grfconfig = NULL;
peter1138@5228: 	if (defaults) CopyGRFConfigList(&_grfconfig, _grfconfig_newgame);
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Check if all GRFs in the GRF Config can be loaded */
peter1138@5228: bool IsGoodGRFConfigList(void)
peter1138@5228: {
peter1138@5228: 	bool res = true;
peter1138@5228: 	GRFConfig *c;
peter1138@5228: 
peter1138@5228: 	for (c = _grfconfig; c != NULL; c = c->next) {
peter1138@5228: 		const GRFConfig *f = FindGRFConfig(c->grfid, c->md5sum);
peter1138@5228: 		if (f == NULL) {
peter1138@5228: 			char buf[512], *p = buf;
peter1138@5228: 			uint i;
peter1138@5228: 
peter1138@5228: 			p += snprintf(p, lastof(buf) - p, "Couldn't find NewGRF %08X (%s) checksum ", BSWAP32(c->grfid), c->filename);
peter1138@5228: 			for (i = 0; i < lengthof(c->md5sum); i++) {
peter1138@5228: 				p += snprintf(p, lastof(buf) - p, "%02X", c->md5sum[i]);
peter1138@5228: 			}
peter1138@5228: 			ShowInfo(buf);
peter1138@5228: 
peter1138@5228: 			res = false;
peter1138@5228: 		} else {
peter1138@5228: 			DEBUG(grf, 1) ("[GRF] Loading GRF %X from %s", BSWAP32(c->grfid), f->filename);
peter1138@5228: 			c->filename = strdup(f->filename);
peter1138@5228: 			c->name     = strdup(f->name);
peter1138@5228: 			c->info     = strdup(f->info);
peter1138@5228: 		}
peter1138@5228: 	}
peter1138@5228: 
peter1138@5228: 	return res;
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb);
peter1138@5228: 
peter1138@5228: /* Scan a path for NewGRFs */
peter1138@5228: static uint ScanPath(const char *path)
peter1138@5228: {
peter1138@5228: 	uint num = 0;
peter1138@5228: 	struct stat sb;
peter1138@5228: 	struct dirent *dirent;
peter1138@5228: 	DIR *dir;
peter1138@5228: 	GRFConfig *c;
peter1138@5228: 
peter1138@5228: 	if ((dir = opendir(path)) == NULL) return 0;
peter1138@5228: 
peter1138@5228: 	while ((dirent = readdir(dir)) != NULL) {
peter1138@5228: 		const char *d_name = FS2OTTD(dirent->d_name);
peter1138@5228: 		char filename[MAX_PATH];
peter1138@5228: 
peter1138@5228: 		if (!FiosIsValidFile(path, dirent, &sb)) continue;
peter1138@5228: 
peter1138@5228: 		snprintf(filename, lengthof(filename), "%s" PATHSEP "%s", path, d_name);
peter1138@5228: 
peter1138@5228: 		if (sb.st_mode & S_IFDIR) {
peter1138@5228: 			/* Directory */
peter1138@5228: 			if (strcmp(d_name, ".") == 0 || strcmp(d_name, "..") == 0) continue;
peter1138@5228: 			num += ScanPath(filename);
peter1138@5228: 		} else if (sb.st_mode & S_IFREG) {
peter1138@5228: 			/* File */
peter1138@5228: 			char *ext = strrchr(filename, '.');
peter1138@5229: 			char *file = filename + strlen(_path.data_dir) + 1; // Crop base path
peter1138@5228: 
peter1138@5228: 			/* If no extension or extension isn't .grf, skip the file */
peter1138@5228: 			if (ext == NULL) continue;
peter1138@5228: 			if (strcasecmp(ext, ".grf") != 0) continue;
peter1138@5228: 
peter1138@5228: 			c = calloc(1, sizeof(*c));
peter1138@5228: 			c->filename = strdup(file);
peter1138@5228: 
peter1138@5228: 			if (FillGRFDetails(c)) {
peter1138@5228: 				if (_all_grfs == NULL) {
peter1138@5228: 					_all_grfs = c;
peter1138@5228: 				} else {
peter1138@5228: 					/* Insert file into list at a position determined by its
peter1138@5228: 					 * name, so the list is sorted as we go along */
peter1138@5228: 					GRFConfig **pd, *d;
peter1138@5228: 					for (pd = &_all_grfs; (d = *pd) != NULL; pd = &d->next) {
peter1138@5228: 						if (strcasecmp(c->name, d->name) <= 0) break;
peter1138@5228: 					}
peter1138@5228: 					c->next = d;
peter1138@5228: 					*pd = c;
peter1138@5228: 				}
peter1138@5228: 
peter1138@5228: 				num++;
peter1138@5228: 			} else {
peter1138@5228: 				/* File couldn't be opened, or is either not a NewGRF or is a
peter1138@5228: 				 * 'system' NewGRF, so forget about it. */
peter1138@5228: 				free(c->filename);
peter1138@5228: 				free(c->name);
peter1138@5228: 				free(c->info);
peter1138@5228: 				free(c);
peter1138@5228: 			}
peter1138@5228: 		}
peter1138@5228: 	}
peter1138@5228: 
peter1138@5228: 	closedir(dir);
peter1138@5228: 
peter1138@5228: 	return num;
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Scan for all NewGRFs */
peter1138@5228: void ScanNewGRFFiles(void)
peter1138@5228: {
peter1138@5228: 	uint num;
peter1138@5228: 
peter1138@5228: 	ClearGRFConfigList(_all_grfs);
peter1138@5228: 	_all_grfs = NULL;
peter1138@5228: 
peter1138@5228: 	DEBUG(grf, 1) ("[GRF] Scanning for NewGRFs");
peter1138@5228: 	num = ScanPath(_path.data_dir);
peter1138@5228: 	DEBUG(grf, 1) ("[GRF] Scan complete, found %d files", num);
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: /* Find a NewGRF in the scanned list */
peter1138@5228: const GRFConfig *FindGRFConfig(uint32 grfid, uint8 *md5sum)
peter1138@5228: {
peter1138@5228: 	GRFConfig *c;
peter1138@5228: 	static const uint8 blanksum[sizeof(c->md5sum)] = { 0 };
peter1138@5228: 
peter1138@5228: 	for (c = _all_grfs; c != NULL; c = c->next) {
peter1138@5228: 		if (c->grfid == grfid) {
peter1138@5228: 			if (memcmp(blanksum, c->md5sum, sizeof(c->md5sum)) == 0) CalcGRFMD5Sum(c);
peter1138@5228: 			if (memcmp(md5sum, c->md5sum, sizeof(c->md5sum)) == 0) return c;
peter1138@5228: 		}
peter1138@5228: 	}
peter1138@5228: 
peter1138@5228: 	return NULL;
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5234: /* Retrieve a NewGRF from the current config by its grfid */
peter1138@5234: const GRFConfig *GetGRFConfig(uint32 grfid)
peter1138@5234: {
peter1138@5234: 	GRFConfig *c;
peter1138@5234: 
peter1138@5234: 	for (c = _grfconfig; c != NULL; c = c->next) {
peter1138@5234: 		if (c->grfid == grfid) return c;
peter1138@5234: 	}
peter1138@5234: 
peter1138@5234: 	return NULL;
peter1138@5234: }
peter1138@5234: 
peter1138@5234: 
peter1138@5228: static const SaveLoad _grfconfig_desc[] = {
peter1138@5228: 	SLE_STR(GRFConfig, filename,   SLE_STR, 0x40),
peter1138@5228: 	SLE_VAR(GRFConfig, grfid,      SLE_UINT32),
peter1138@5228: 	SLE_ARR(GRFConfig, md5sum,     SLE_UINT8, 16),
peter1138@5228: 	SLE_ARR(GRFConfig, param,      SLE_UINT32, 0x80),
peter1138@5228: 	SLE_VAR(GRFConfig, num_params, SLE_UINT8),
peter1138@5228: 	SLE_END()
peter1138@5228: };
peter1138@5228: 
peter1138@5228: 
peter1138@5228: static void Save_NGRF(void)
peter1138@5228: {
peter1138@5228: 	GRFConfig *c;
peter1138@5228: 	int index = 0;
peter1138@5228: 
peter1138@5228: 	for (c = _grfconfig; c != NULL; c = c->next) {
peter1138@5228: 		SlSetArrayIndex(index++);
peter1138@5228: 		SlObject(c, _grfconfig_desc);
peter1138@5228: 	}
peter1138@5228: }
peter1138@5228: 
peter1138@5228: 
peter1138@5228: static void Load_NGRF(void)
peter1138@5228: {
peter1138@5228: 	GRFConfig *first = NULL;
peter1138@5228: 	GRFConfig **last = &first;
peter1138@5228: 
peter1138@5228: 	while (SlIterateArray() != -1) {
peter1138@5228: 		GRFConfig *c = calloc(1, sizeof(*c));
peter1138@5228: 		SlObject(c, _grfconfig_desc);
peter1138@5228: 
peter1138@5228: 		/* Append our configuration to the list */
peter1138@5228: 		*last = c;
peter1138@5228: 		last = &c->next;
peter1138@5228: 	}
peter1138@5228: 
peter1138@5228: 	ClearGRFConfigList(_grfconfig);
peter1138@5228: 	_grfconfig = first;
peter1138@5228: }
peter1138@5228: 
peter1138@5228: const ChunkHandler _newgrf_chunk_handlers[] = {
peter1138@5228: 	{ 'NGRF', Save_NGRF, Load_NGRF, CH_ARRAY | CH_LAST }
peter1138@5228: };
peter1138@5228: