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/* $Id$ */

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     3

/** @file

     4

 * All actions handling saving and loading of the settings/configuration goes on in this file.

     5

 * The file consists of four parts:

     6

 * <ol>

     7

 * <li>Parsing the configuration file (openttd.cfg). This is achieved with the ini_ functions which

     8

 *     handle various types, such as normal 'key = value' pairs, lists and value combinations of

     9

 *     lists, strings, integers, 'bit'-masks and element selections.

    10

 * <li>Defining the data structures that go into the configuration. These include for example

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 *     the _patches struct, but also network-settings, banlists, newgrf, etc. There are a lot

    12

 *     of helper macros available for the various types, and also saving/loading of these settings

    13

 *     in a savegame is handled inside these structures.

    14

 * <li>Handle reading and writing to the setting-structures from inside the game either from

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 *     the console for example or through the gui with CMD_ functions.

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 * <li>Handle saving/loading of the PATS chunk inside the savegame.

    17

 * </ol>

    18

 * @see SettingDesc

    19

 * @see SaveLoad

    20

 */

    21

    22

#include "stdafx.h"

    23

#include "openttd.h"

    24

#include "currency.h"

    25

#include "functions.h"

    26

#include "macros.h"

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#include "screenshot.h"

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#include "sound.h"

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#include "string.h"

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#include "variables.h"

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#include "network.h"

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#include "settings.h"

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#include "command.h"

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#include "console.h"

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#include "saveload.h"

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#include "npf.h"

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#include "yapf/yapf.h"

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#include "newgrf.h"

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/** The patch values that are used for new games and/or modified in config file */

    41

Patches _patches_newgame;

    42

    43

typedef struct IniFile IniFile;

    44

typedef struct IniItem IniItem;

    45

typedef struct IniGroup IniGroup;

    46

typedef struct SettingsMemoryPool SettingsMemoryPool;

    47

    48

typedef const char *SettingListCallbackProc(const IniItem *item, uint index);

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typedef void SettingDescProc(IniFile *ini, const SettingDesc *desc, const char *grpname, void *object);

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typedef void SettingDescProcList(IniFile *ini, const char *grpname, char **list, uint len, SettingListCallbackProc proc);

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    52

static void pool_init(SettingsMemoryPool **pool);

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static void *pool_alloc(SettingsMemoryPool **pool, uint size);

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static void *pool_strdup(SettingsMemoryPool **pool, const char *mem, uint size);

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static void pool_free(SettingsMemoryPool **pool);

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static bool IsSignedVarMemType(VarType vt);

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    58

struct SettingsMemoryPool {

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	uint pos,size;

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	SettingsMemoryPool *next;

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	byte mem[1];

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};

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    64

static SettingsMemoryPool *pool_new(uint minsize)

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{

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	SettingsMemoryPool *p;

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	if (minsize < 4096 - 12) minsize = 4096 - 12;

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    69

	p = malloc(sizeof(SettingsMemoryPool) - 1 + minsize);

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	p->pos = 0;

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	p->size = minsize;

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	p->next = NULL;

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	return p;

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}

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    76

static void pool_init(SettingsMemoryPool **pool)

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{

    78

	*pool = pool_new(0);

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}

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    81

static void *pool_alloc(SettingsMemoryPool **pool, uint size)

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{

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	uint pos;

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	SettingsMemoryPool *p = *pool;

    85

    86

	size = ALIGN(size, sizeof(void*));

    87

    88

	// first check if there's memory in the next pool

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	if (p->next && p->next->pos + size <= p->next->size) {

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		p = p->next;

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	// then check if there's not memory in the cur pool

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	} else if (p->pos + size > p->size) {

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		SettingsMemoryPool *n = pool_new(size);

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		*pool = n;

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		n->next = p;

    96

		p = n;

    97

	}

    98

    99

	pos = p->pos;

   100

	p->pos += size;

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	return p->mem + pos;

   102

}

   103

   104

static void *pool_strdup(SettingsMemoryPool **pool, const char *mem, uint size)

   105

{

   106

	byte *p = pool_alloc(pool, size + 1);

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	p[size] = 0;

   108

	memcpy(p, mem, size);

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	return p;

   110

}

   111

   112

static void pool_free(SettingsMemoryPool **pool)

   113

{

   114

	SettingsMemoryPool *p = *pool, *n;

   115

	*pool = NULL;

   116

	while (p) {

   117

		n = p->next;

   118

		free(p);

   119

		p = n;

   120

	}

   121

}

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   123

// structs describing the ini format.

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struct IniItem {

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	char *name;

   126

	char *value;

   127

	char *comment;

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	IniItem *next;

   129

};

   130

   131

struct IniGroup {

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	char *name; // name of group

   133

	char *comment; //comment for group

   134

	IniItem *item, **last_item;

   135

	IniGroup *next;

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	IniFile *ini;

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	IniGroupType type; // type of group

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};

   139

   140

struct IniFile {

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	SettingsMemoryPool *pool;

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	IniGroup *group, **last_group;

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	char *comment; // last comment in file

   144

};

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   146

// allocate an inifile object

   147

static IniFile *ini_alloc(void)

   148

{

   149

	IniFile *ini;

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	SettingsMemoryPool *pool;

   151

	pool_init(&pool);

   152

	ini = (IniFile*)pool_alloc(&pool, sizeof(IniFile));

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	ini->pool = pool;

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	ini->group = NULL;

   155

	ini->last_group = &ini->group;

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	ini->comment = NULL;

   157

	return ini;

   158

}

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   160

// allocate an ini group object

   161

static IniGroup *ini_group_alloc(IniFile *ini, const char *grpt, int len)

   162

{

   163

	IniGroup *grp = pool_alloc(&ini->pool, sizeof(IniGroup));

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	grp->ini = ini;

   165

	grp->name = pool_strdup(&ini->pool, grpt, len);

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	if (!strcmp(grp->name, "newgrf") || !strcmp(grp->name, "servers") || !strcmp(grp->name, "bans")) {

   167

		grp->type = IGT_LIST;

   168

	} else {

   169

		grp->type = IGT_VARIABLES;

   170

	}

   171

	grp->next = NULL;

   172

	grp->item = NULL;

   173

	grp->comment = NULL;

   174

	grp->last_item = &grp->item;

   175

	*ini->last_group = grp;

   176

	ini->last_group = &grp->next;

   177

	return grp;

   178

}

   179

   180

static IniItem *ini_item_alloc(IniGroup *group, const char *name, int len)

   181

{

   182

	IniItem *item = pool_alloc(&group->ini->pool, sizeof(IniItem));

   183

	item->name = pool_strdup(&group->ini->pool, name, len);

   184

	item->next = NULL;

   185

	item->comment = NULL;

   186

	item->value = NULL;

   187

	*group->last_item = item;

   188

	group->last_item = &item->next;

   189

	return item;

   190

}

   191

   192

// load an ini file into the "abstract" format

   193

static IniFile *ini_load(const char *filename)

   194

{

   195

	char buffer[1024], c, *s, *t, *e;

   196

	FILE *in;

   197

	IniFile *ini;

   198

	IniGroup *group = NULL;

   199

	IniItem *item;

   200

   201

	char *comment = NULL;

   202

	uint comment_size = 0;

   203

	uint comment_alloc = 0;

   204

   205

	ini = ini_alloc();

   206

   207

	in = fopen(filename, "r");

   208

	if (in == NULL) return ini;

   209

   210

	// for each line in the file

   211

	while (fgets(buffer, sizeof(buffer), in)) {

   212

   213

		// trim whitespace from the left side

   214

		for (s = buffer; *s == ' ' || *s == '\t'; s++);

   215

   216

		// trim whitespace from right side.

   217

		e = s + strlen(s);

   218

		while (e > s && ((c=e[-1]) == '\n' || c == '\r' || c == ' ' || c == '\t')) e--;

   219

		*e = '\0';

   220

   221

		// skip comments and empty lines

   222

		if (*s == '#' || *s == '\0') {

   223

			uint ns = comment_size + (e - s + 1);

   224

			uint a = comment_alloc;

   225

			uint pos;

   226

			// add to comment

   227

			if (ns > a) {

   228

				a = max(a, 128);

   229

				do a*=2; while (a < ns);

   230

				comment = realloc(comment, comment_alloc = a);

   231

			}

   232

			pos = comment_size;

   233

			comment_size += (e - s + 1);

   234

			comment[pos + e - s] = '\n'; // comment newline

   235

			memcpy(comment + pos, s, e - s); // copy comment contents

   236

			continue;

   237

		}

   238

   239

		// it's a group?

   240

		if (s[0] == '[') {

   241

			if (e[-1] != ']') {

   242

				ShowInfoF("ini: invalid group name '%s'\n", buffer);

   243

			} else {

   244

				e--;

   245

			}

   246

			s++; // skip [

   247

			group = ini_group_alloc(ini, s, e - s);

   248

			if (comment_size) {

   249

				group->comment = pool_strdup(&ini->pool, comment, comment_size);

   250

				comment_size = 0;

   251

			}

   252

		} else if (group) {

   253

			// find end of keyname

   254

			for (t = s; *t != '\0' && *t != '=' && *t != '\t' && *t != ' '; t++);

   255

   256

			// it's an item in an existing group

   257

			item = ini_item_alloc(group, s, t-s);

   258

			if (comment_size) {

   259

				item->comment = pool_strdup(&ini->pool, comment, comment_size);

   260

				comment_size = 0;

   261

			}

   262

   263

			// find start of parameter

   264

			while (*t == '=' || *t == ' ' || *t == '\t') t++;

   265

   266

   267

			// remove starting quotation marks

   268

			if (*t == '\"') t++;

   269

			// remove ending quotation marks

   270

			e = t + strlen(t);

   271

			if (e > t && e[-1] == '\"') e--;

   272

			*e = '\0';

   273

   274

			item->value = pool_strdup(&ini->pool, t, e - t);

   275

		} else {

   276

			// it's an orphan item

   277

			ShowInfoF("ini: '%s' outside of group\n", buffer);

   278

		}

   279

	}

   280

   281

	if (comment_size > 0) {

   282

		ini->comment = pool_strdup(&ini->pool, comment, comment_size);

   283

		comment_size = 0;

   284

	}

   285

   286

	free(comment);

   287

	fclose(in);

   288

   289

	return ini;

   290

}

   291

   292

// lookup a group or make a new one

   293

static IniGroup *ini_getgroup(IniFile *ini, const char *name, int len)

   294

{

   295

	IniGroup *group;

   296

   297

	if (len == -1) len = strlen(name);

   298

   299

	// does it exist already?

   300

	for (group = ini->group; group; group = group->next)

   301

		if (!memcmp(group->name, name, len) && group->name[len] == 0)

   302

			return group;

   303

   304

	// otherwise make a new one

   305

	group = ini_group_alloc(ini, name, len);

   306

	group->comment = pool_strdup(&ini->pool, "\n", 1);

   307

	return group;

   308

}

   309

   310

// lookup an item or make a new one

   311

static IniItem *ini_getitem(IniGroup *group, const char *name, bool create)

   312

{

   313

	IniItem *item;

   314

	uint len = strlen(name);

   315

   316

	for (item = group->item; item; item = item->next)

   317

		if (strcmp(item->name, name) == 0) return item;

   318

   319

	if (!create) return NULL;

   320

   321

	// otherwise make a new one

   322

	return ini_item_alloc(group, name, len);

   323

}

   324

   325

// save ini file from the "abstract" format.

   326

static bool ini_save(const char *filename, IniFile *ini)

   327

{

   328

	FILE *f;

   329

	IniGroup *group;

   330

	IniItem *item;

   331

   332

	f = fopen(filename, "w");

   333

	if (f == NULL) return false;

   334

   335

	for (group = ini->group; group != NULL; group = group->next) {

   336

		if (group->comment) fputs(group->comment, f);

   337

		fprintf(f, "[%s]\n", group->name);

   338

		for (item = group->item; item != NULL; item = item->next) {

   339

			assert(item->value != NULL);

   340

			if (item->comment != NULL) fputs(item->comment, f);

   341

   342

			//*Don't give an equal sign to list items that don't have a parameter */

   343

			if (group->type == IGT_LIST && *item->value == '\0') {

   344

				fprintf(f, "%s\n", item->name);

   345

			} else {

   346

				fprintf(f, "%s = %s\n", item->name, item->value);

   347

			}

   348

		}

   349

	}

   350

	if (ini->comment) fputs(ini->comment, f);

   351

   352

	fclose(f);

   353

	return true;

   354

}

   355

   356

static void ini_free(IniFile *ini)

   357

{

   358

	pool_free(&ini->pool);

   359

}

   360

   361

/** Find the index value of a ONEofMANY type in a string seperated by |

   362

 * @param many full domain of values the ONEofMANY setting can have

   363

 * @param one the current value of the setting for which a value needs found

   364

 * @param onelen force calculation of the *one parameter

   365

 * @return the integer index of the full-list, or -1 if not found */

   366

static int lookup_oneofmany(const char *many, const char *one, int onelen)

   367

{

   368

	const char *s;

   369

	int idx;

   370

   371

	if (onelen == -1) onelen = strlen(one);

   372

   373

	// check if it's an integer

   374

	if (*one >= '0' && *one <= '9')

   375

		return strtoul(one, NULL, 0);

   376

   377

	idx = 0;

   378

	for (;;) {

   379

		// find end of item

   380

		s = many;

   381

		while (*s != '|' && *s != 0) s++;

   382

		if (s - many == onelen && !memcmp(one, many, onelen)) return idx;

   383

		if (*s == 0) return -1;

   384

		many = s + 1;

   385

		idx++;

   386

	}

   387

}

   388

   389

/** Find the set-integer value MANYofMANY type in a string

   390

 * @param many full domain of values the MANYofMANY setting can have

   391

 * @param str the current string value of the setting, each individual

   392

 * of seperated by a whitespace\tab or | character

   393

 * @return the 'fully' set integer, or -1 if a set is not found */

   394

static uint32 lookup_manyofmany(const char *many, const char *str)

   395

{

   396

	const char *s;

   397

	int r;

   398

	uint32 res = 0;

   399

   400

	for (;;) {

   401

		// skip "whitespace"

   402

		while (*str == ' ' || *str == '\t' || *str == '|') str++;

   403

		if (*str == 0) break;

   404

   405

		s = str;

   406

		while (*s != 0 && *s != ' ' && *s != '\t' && *s != '|') s++;

   407

   408

		r = lookup_oneofmany(many, str, s - str);

   409

		if (r == -1) return (uint32)-1;

   410

   411

		SETBIT(res, r); // value found, set it

   412

		if (*s == 0) break;

   413

		str = s + 1;

   414

	}

   415

	return res;

   416

}

   417

   418

/** Parse an integerlist string and set each found value

   419

 * @param p the string to be parsed. Each element in the list is seperated by a

   420

 * comma or a space character

   421

 * @param items pointer to the integerlist-array that will be filled with values

   422

 * @param maxitems the maximum number of elements the integerlist-array has

   423

 * @return returns the number of items found, or -1 on an error */

   424

static int parse_intlist(const char *p, int *items, int maxitems)

   425

{

   426

	int n = 0, v;

   427

	char *end;

   428

   429

	for (;;) {

   430

		v = strtol(p, &end, 0);

   431

		if (p == end || n == maxitems) return -1;

   432

		p = end;

   433

		items[n++] = v;

   434

		if (*p == '\0') break;

   435

		if (*p != ',' && *p != ' ') return -1;

   436

		p++;

   437

	}

   438

   439

	return n;

   440

}

   441

   442

/** Load parsed string-values into an integer-array (intlist)

   443

 * @param str the string that contains the values (and will be parsed)

   444

 * @param array pointer to the integer-arrays that will be filled

   445

 * @param nelems the number of elements the array holds. Maximum is 64 elements

   446

 * @param type the type of elements the array holds (eg INT8, UINT16, etc.)

   447

 * @return return true on success and false on error */

   448

static bool load_intlist(const char *str, void *array, int nelems, VarType type)

   449

{

   450

	int items[64];

   451

	int i, nitems;

   452

   453

	if (str == NULL) {

   454

		memset(items, 0, sizeof(items));

   455

		nitems = nelems;

   456

	} else {

   457

		nitems = parse_intlist(str, items, lengthof(items));

   458

		if (nitems != nelems) return false;

   459

	}

   460

   461

	switch (type) {

   462

	case SLE_VAR_BL:

   463

	case SLE_VAR_I8:

   464

	case SLE_VAR_U8:

   465

		for (i = 0; i != nitems; i++) ((byte*)array)[i] = items[i];

   466

		break;

   467

	case SLE_VAR_I16:

   468

	case SLE_VAR_U16:

   469

		for (i = 0; i != nitems; i++) ((uint16*)array)[i] = items[i];

   470

		break;

   471

	case SLE_VAR_I32:

   472

	case SLE_VAR_U32:

   473

		for (i = 0; i != nitems; i++) ((uint32*)array)[i] = items[i];

   474

		break;

   475

	default: NOT_REACHED();

   476

	}

   477

   478

	return true;

   479

}

   480

   481

/** Convert an integer-array (intlist) to a string representation. Each value

   482

 * is seperated by a comma or a space character

   483

 * @param buf output buffer where the string-representation will be stored

   484

 * @param array pointer to the integer-arrays that is read from

   485

 * @param nelems the number of elements the array holds.

   486

 * @param type the type of elements the array holds (eg INT8, UINT16, etc.) */

   487

static void make_intlist(char *buf, const void *array, int nelems, VarType type)

   488

{

   489

	int i, v = 0;

   490

	const byte *p = (const byte*)array;

   491

   492

	for (i = 0; i != nelems; i++) {

   493

		switch (type) {

   494

		case SLE_VAR_BL:

   495

		case SLE_VAR_I8:  v = *(int8*)p;   p += 1; break;

   496

		case SLE_VAR_U8:  v = *(byte*)p;   p += 1; break;

   497

		case SLE_VAR_I16: v = *(int16*)p;  p += 2; break;

   498

		case SLE_VAR_U16: v = *(uint16*)p; p += 2; break;

   499

		case SLE_VAR_I32: v = *(int32*)p;  p += 4; break;

   500

		case SLE_VAR_U32: v = *(uint32*)p; p += 4; break;

   501

		default: NOT_REACHED();

   502

		}

   503

		buf += sprintf(buf, (i == 0) ? "%d" : ",%d", v);

   504

	}

   505

}

   506

   507