Files @ r8424:8ec8538eb70c
Branch filter:

Location: cpp/openttd-patchpack/source/src/newgrf_text.cpp

maedhros
(svn r11994) -Codechange: Remove numbers from string names where the strings aren't present in TTD, since they don't correspond to either TTD's TextIDs or OpenTTD's StringIDs.
  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
/* $Id$ */

/** @file newgrf_text.cpp
 * Implementation of  Action 04 "universal holder" structure and functions.
 * This file implements a linked-lists of strings,
 * holding everything that the newgrf action 04 will send over to OpenTTD.
 * One of the biggest problems is that Dynamic lang Array uses ISO codes
 * as way to identifying current user lang, while newgrf uses bit shift codes
 * not related to ISO.  So equivalence functionnality had to be set.
 */

#include "stdafx.h"
#include "debug.h"
#include "openttd.h"
#include "variables.h"
#include "newgrf.h"
#include "newgrf_text.h"
#include "strings_func.h"
#include "core/alloc_func.hpp"
#include "newgrf_storage.h"
#include "string_func.h"

#include "table/strings.h"
#include "table/control_codes.h"

#define GRFTAB  28
#define TABSIZE 11

/**
 * Explains the newgrf shift bit positionning.
 * the grf base will not be used in order to find the string, but rather for
 * jumping from standard langID scheme to the new one.
 */
enum grf_base_languages {
	GRFLB_AMERICAN    = 0x01,
	GRFLB_ENGLISH     = 0x02,
	GRFLB_GERMAN      = 0x04,
	GRFLB_FRENCH      = 0x08,
	GRFLB_SPANISH     = 0x10,
	GRFLB_GENERIC     = 0x80,
};

enum grf_extended_languages {
	GRFLX_AMERICAN    = 0x00,
	GRFLX_ENGLISH     = 0x01,
	GRFLX_GERMAN      = 0x02,
	GRFLX_FRENCH      = 0x03,
	GRFLX_SPANISH     = 0x04,
	GRFLX_ESPERANTO   = 0x05,
	GRFLX_RUSSIAN     = 0x07,
	GRFLX_CZECH       = 0x15,
	GRFLX_SLOVAK      = 0x16,
	GRFLX_BULGARIAN   = 0x18,
	GRFLX_AFRIKAANS   = 0x1B,
	GRFLX_GREEK       = 0x1E,
	GRFLX_DUTCH       = 0x1F,
	GRFLX_CATALAN     = 0x22,
	GRFLX_HUNGARIAN   = 0x24,
	GRFLX_ITALIAN     = 0x27,
	GRFLX_ROMANIAN    = 0x28,
	GRFLX_ICELANDIC   = 0x29,
	GRFLX_LATVIAN     = 0x2A,
	GRFLX_LITHUANIAN  = 0x2B,
	GRFLX_SLOVENIAN   = 0x2C,
	GRFLX_DANISH      = 0x2D,
	GRFLX_SWEDISH     = 0x2E,
	GRFLX_NORWEGIAN   = 0x2F,
	GRFLX_POLISH      = 0x30,
	GRFLX_GALICIAN    = 0x31,
	GRFLX_FRISIAN     = 0x32,
	GRFLX_UKRAINIAN   = 0x33,
	GRFLX_ESTONIAN    = 0x34,
	GRFLX_FINNISH     = 0x35,
	GRFLX_PORTUGUESE  = 0x36,
	GRFLX_BRAZILIAN   = 0x37,
	GRFLX_CROATIAN    = 0x38,
	GRFLX_JAPANESE    = 0x39,
	GRFLX_KOREAN      = 0x3A,
	GRFLX_TURKISH     = 0x3E,
	GRFLX_UNSPECIFIED = 0x7F,
};


struct iso_grf {
	char code[6];
	byte grfLangID;
};

/**
 * ISO code VS NewGrf langID conversion array.
 * This array is used in two ways:
 * 1-its ISO part is matching OpenTTD dynamic language id
 *   with newgrf bit positionning language id
 * 2-its shift part is used to know what is the shift to
 *   watch for when inserting new strings, hence analysing newgrf langid
 */
const iso_grf iso_codes[] = {
	{"en_US", GRFLX_AMERICAN},
	{"en_GB", GRFLX_ENGLISH},
	{"de_DE", GRFLX_GERMAN},
	{"fr_FR", GRFLX_FRENCH},
	{"es_ES", GRFLX_SPANISH},
	{"af_ZA", GRFLX_AFRIKAANS},
	{"hr_HR", GRFLX_CROATIAN},
	{"cs_CZ", GRFLX_CZECH},
	{"ca_ES", GRFLX_CATALAN},
	{"da_DA", GRFLX_DANISH},
	{"nl_NL", GRFLX_DUTCH},
	{"et_ET", GRFLX_ESTONIAN},
	{"fi_FI", GRFLX_FINNISH},
	{"fy_NL", GRFLX_FRISIAN},
	{"gl_ES", GRFLX_GALICIAN},
	{"el_GR", GRFLX_GREEK},
	{"hu_HU", GRFLX_HUNGARIAN},
	{"is_IS", GRFLX_ICELANDIC},
	{"it_IT", GRFLX_ITALIAN},
	{"lv_LV", GRFLX_LATVIAN},
	{"lt_LT", GRFLX_LITHUANIAN},
	{"nb_NO", GRFLX_NORWEGIAN},
	{"pl_PL", GRFLX_POLISH},
	{"pt_PT", GRFLX_PORTUGUESE},
	{"pt_BR", GRFLX_BRAZILIAN},
	{"ro_RO", GRFLX_ROMANIAN},
	{"ru_RU", GRFLX_RUSSIAN},
	{"sk_SK", GRFLX_SLOVAK},
	{"sl_SL", GRFLX_SLOVENIAN},
	{"sv_SE", GRFLX_SWEDISH},
	{"tr_TR", GRFLX_TURKISH},
	{"uk_UA", GRFLX_UKRAINIAN},
	{"eo_EO", GRFLX_ESPERANTO},
	{"bg_BG", GRFLX_BULGARIAN},
	{"ja_JP", GRFLX_JAPANESE},
	{"ko_KR", GRFLX_KOREAN},
	{"gen",   GRFLB_GENERIC}   ///< this is not iso code, but there has to be something...
};


/**
 * Element of the linked list.
 * Each of those elements represent the string,
 * but according to a different lang.
 */
struct GRFText {
	public:
		static GRFText* New(byte langid, const char* text)
		{
			return new(strlen(text) + 1) GRFText(langid, text);
		}

	private:
		GRFText(byte langid_, const char* text_) : next(NULL), langid(langid_)
		{
			strcpy(text, text_);
		}

		void* operator new(size_t size, size_t extra)
		{
			return ::operator new(size + extra);
		}

public:
		/* dummy operator delete to silence VC8:
		 * 'void *GRFText::operator new(size_t,size_t)' : no matching operator delete found;
		 *     memory will not be freed if initialization throws an exception */
		void operator delete(void *p, size_t extra)
		{
			return ::operator delete(p);
		}

	public:
		GRFText *next;
		byte langid;
		char text[VARARRAY_SIZE];
};


/**
 * Holder of the above structure.
 * Putting both grfid and stringid together allows us to avoid duplicates,
 * since it is NOT SUPPOSED to happen.
 */
struct GRFTextEntry {
	uint32 grfid;
	uint16 stringid;
	StringID def_string;
	GRFText *textholder;
};


static uint _num_grf_texts = 0;
static GRFTextEntry _grf_text[(1 << TABSIZE) * 3];
static byte _currentLangID = GRFLX_ENGLISH;  ///< by default, english is used.


char *TranslateTTDPatchCodes(const char *str)
{
	char *tmp = MallocT<char>(strlen(str) * 10 + 1); // Allocate space to allow for expansion
	char *d = tmp;
	bool unicode = false;
	WChar c;
	size_t len = Utf8Decode(&c, str);

	if (c == 0x00DE) {
		/* The thorn ('þ') indicates a unicode string to TTDPatch */
		unicode = true;
		str += len;
	}

	for (;;) {
		if (unicode && Utf8EncodedCharLen(*str) != 0) {
			c = Utf8Consume(&str);
			/* 'Magic' range of control codes. */
			if (GB(c, 8, 8) == 0xE0) c = GB(c, 0, 8);
		} else {
			c = (byte)*str++;
		}
		if (c == 0) break;

		switch (c) {
			case 0x01:
				d += Utf8Encode(d, SCC_SETX);
				*d++ = *str++;
				break;
			case 0x0A: break;
			case 0x0D: *d++ = 0x0A; break;
			case 0x0E: d += Utf8Encode(d, SCC_TINYFONT); break;
			case 0x0F: d += Utf8Encode(d, SCC_BIGFONT); break;
			case 0x1F:
				d += Utf8Encode(d, SCC_SETXY);
				*d++ = *str++;
				*d++ = *str++;
				break;
			case 0x7B:
			case 0x7C:
			case 0x7D:
			case 0x7E:
			case 0x7F:
			case 0x80: d += Utf8Encode(d, SCC_NEWGRF_PRINT_DWORD + c - 0x7B); break;
			case 0x81: {
				StringID string;
				string  = *str++;
				string |= *str++ << 8;
				d += Utf8Encode(d, SCC_STRING_ID);
				d += Utf8Encode(d, string);
				break;
			}
			case 0x82:
			case 0x83:
			case 0x84: d += Utf8Encode(d, SCC_NEWGRF_PRINT_WORD_SPEED + c - 0x82); break;
			case 0x85: d += Utf8Encode(d, SCC_NEWGRF_DISCARD_WORD);       break;
			case 0x86: d += Utf8Encode(d, SCC_NEWGRF_ROTATE_TOP_4_WORDS); break;
			case 0x87: d += Utf8Encode(d, SCC_NEWGRF_PRINT_WORD_LITRES);  break;
			case 0x88: d += Utf8Encode(d, SCC_BLUE);    break;
			case 0x89: d += Utf8Encode(d, SCC_SILVER);  break;
			case 0x8A: d += Utf8Encode(d, SCC_GOLD);    break;
			case 0x8B: d += Utf8Encode(d, SCC_RED);     break;
			case 0x8C: d += Utf8Encode(d, SCC_PURPLE);  break;
			case 0x8D: d += Utf8Encode(d, SCC_LTBROWN); break;
			case 0x8E: d += Utf8Encode(d, SCC_ORANGE);  break;
			case 0x8F: d += Utf8Encode(d, SCC_GREEN);   break;
			case 0x90: d += Utf8Encode(d, SCC_YELLOW);  break;
			case 0x91: d += Utf8Encode(d, SCC_DKGREEN); break;
			case 0x92: d += Utf8Encode(d, SCC_CREAM);   break;
			case 0x93: d += Utf8Encode(d, SCC_BROWN);   break;
			case 0x94: d += Utf8Encode(d, SCC_WHITE);   break;
			case 0x95: d += Utf8Encode(d, SCC_LTBLUE);  break;
			case 0x96: d += Utf8Encode(d, SCC_GRAY);    break;
			case 0x97: d += Utf8Encode(d, SCC_DKBLUE);  break;
			case 0x98: d += Utf8Encode(d, SCC_BLACK);   break;
			case 0x9A:
				switch (*str++) {
					case 0: /* FALL THROUGH */
					case 1: d += Utf8Encode(d, SCC_NEWGRF_PRINT_QWORD_CURRENCY); break;
					case 3: {
						uint16 tmp = *str++;
						tmp |= (*str++) << 8;
						d += Utf8Encode(d, SCC_NEWGRF_PUSH_WORD); d += Utf8Encode(d, tmp);
					} break;
					case 4: d += Utf8Encode(d, SCC_NEWGRF_UNPRINT); d += Utf8Encode(d, *str++); break;
					default: grfmsg(1, "missing handler for extended format code"); break;
				}
				break;

			case 0x9E: d += Utf8Encode(d, 0x20AC); break; // Euro
			case 0x9F: d += Utf8Encode(d, 0x0178); break; // Y with diaeresis
			case 0xA0: d += Utf8Encode(d, SCC_UPARROW); break;
			case 0xAA: d += Utf8Encode(d, SCC_DOWNARROW); break;
			case 0xAC: d += Utf8Encode(d, SCC_CHECKMARK); break;
			case 0xAD: d += Utf8Encode(d, SCC_CROSS); break;
			case 0xAF: d += Utf8Encode(d, SCC_RIGHTARROW); break;
			case 0xB4: d += Utf8Encode(d, SCC_TRAIN); break;
			case 0xB5: d += Utf8Encode(d, SCC_LORRY); break;
			case 0xB6: d += Utf8Encode(d, SCC_BUS); break;
			case 0xB7: d += Utf8Encode(d, SCC_PLANE); break;
			case 0xB8: d += Utf8Encode(d, SCC_SHIP); break;
			case 0xB9: d += Utf8Encode(d, SCC_SUPERSCRIPT_M1); break;
			case 0xBC: d += Utf8Encode(d, SCC_SMALLUPARROW); break;
			case 0xBD: d += Utf8Encode(d, SCC_SMALLDOWNARROW); break;
			default:
				/* Validate any unhandled character */
				if (!IsValidChar(c, CS_ALPHANUMERAL)) c = '?';
				d += Utf8Encode(d, c);
				break;
		}
	}

	*d = '\0';
	tmp = ReallocT(tmp, strlen(tmp) + 1);
	return tmp;
}


/**
 * Add the new read string into our structure.
 */
StringID AddGRFString(uint32 grfid, uint16 stringid, byte langid_to_add, bool new_scheme, const char *text_to_add, StringID def_string)
{
	char *translatedtext;
	uint id;

	/* When working with the old language scheme (grf_version is less than 7) and
	 * English or American is among the set bits, simply add it as English in
	 * the new scheme, i.e. as langid = 1.
	 * If English is set, it is pretty safe to assume the translations are not
	 * actually translated.
	 */
	if (!new_scheme) {
		if (HASBITS(langid_to_add, GRFLB_AMERICAN | GRFLB_ENGLISH)) {
			langid_to_add = GRFLX_ENGLISH;
		} else {
			StringID ret = STR_EMPTY;
			if (langid_to_add & GRFLB_GERMAN)  ret = AddGRFString(grfid, stringid, GRFLX_GERMAN,  true, text_to_add, def_string);
			if (langid_to_add & GRFLB_FRENCH)  ret = AddGRFString(grfid, stringid, GRFLX_FRENCH,  true, text_to_add, def_string);
			if (langid_to_add & GRFLB_SPANISH) ret = AddGRFString(grfid, stringid, GRFLX_SPANISH, true, text_to_add, def_string);
			return ret;
		}
	}

	for (id = 0; id < _num_grf_texts; id++) {
		if (_grf_text[id].grfid == grfid && _grf_text[id].stringid == stringid) {
			break;
		}
	}

	/* Too many strings allocated, return empty */
	if (id == lengthof(_grf_text)) return STR_EMPTY;

	translatedtext = TranslateTTDPatchCodes(text_to_add);

	GRFText *newtext = GRFText::New(langid_to_add, translatedtext);

	free(translatedtext);

	/* If we didn't find our stringid and grfid in the list, allocate a new id */
	if (id == _num_grf_texts) _num_grf_texts++;

	if (_grf_text[id].textholder == NULL) {
		_grf_text[id].grfid      = grfid;
		_grf_text[id].stringid   = stringid;
		_grf_text[id].def_string = def_string;
		_grf_text[id].textholder = newtext;
	} else {
		GRFText **ptext, *text;
		bool replaced = false;

		/* Loop through all languages and see if we can replace a string */
		for (ptext = &_grf_text[id].textholder; (text = *ptext) != NULL; ptext = &text->next) {
			if (text->langid != langid_to_add) continue;
			newtext->next = text->next;
			*ptext = newtext;
			delete text;
			replaced = true;
			break;
		}

		/* If a string wasn't replaced, then we must append the new string */
		if (!replaced) *ptext = newtext;
	}

	grfmsg(3, "Added 0x%X: grfid %08X string 0x%X lang 0x%X string '%s'", id, grfid, stringid, newtext->langid, newtext->text);

	return (GRFTAB << TABSIZE) + id;
}

/* Used to remember the grfid that the last retrieved string came from */
static uint32 _last_grfid = 0;

/**
 * Returns the index for this stringid associated with its grfID
 */
StringID GetGRFStringID(uint32 grfid, uint16 stringid)
{
	uint id;

	/* grfid is zero when we're being called via an include */
	if (grfid == 0) grfid = _last_grfid;

	for (id = 0; id < _num_grf_texts; id++) {
		if (_grf_text[id].grfid == grfid && _grf_text[id].stringid == stringid) {
			return (GRFTAB << TABSIZE) + id;
		}
	}

	return STR_UNDEFINED;
}


char *GetGRFString(char *buff, uint16 stringid, const char* last)
{
	const GRFText *default_text = NULL;
	const GRFText *search_text;

	assert(_grf_text[stringid].grfid != 0);

	/* Remember this grfid in case the string has included text */
	_last_grfid = _grf_text[stringid].grfid;

	/*Search the list of lang-strings of this stringid for current lang */
	for (search_text = _grf_text[stringid].textholder; search_text != NULL; search_text = search_text->next) {
		if (search_text->langid == _currentLangID) {
			return strecpy(buff, search_text->text, last);
		}

		/* If the current string is English or American, set it as the
		 * fallback language if the specific language isn't available. */
		if (search_text->langid == GRFLX_UNSPECIFIED || (default_text == NULL && (search_text->langid == GRFLX_ENGLISH || search_text->langid == GRFLX_AMERICAN))) {
			default_text = search_text;
		}
	}

	/* If there is a fallback string, return that */
	if (default_text != NULL) return strecpy(buff, default_text->text, last);

	/* Use the default string ID if the fallback string isn't available */
	return GetString(buff, _grf_text[stringid].def_string, last);
}

/**
 * Equivalence Setter function between game and newgrf langID.
 * This function will adjust _currentLangID as to what is the LangID
 * of the current language set by the user.
 * The array iso_codes will be used to find that match.
 * If not found, it will have to be standard english
 * This function is called after the user changed language,
 * from strings.cpp:ReadLanguagePack
 * @param iso_name iso code of current selection
 */
void SetCurrentGrfLangID(const char *iso_name)
{
	/* Use English by default, if we can't match up the iso_code. */
	byte ret = GRFLX_ENGLISH;
	byte i;

	for (i=0; i < lengthof(iso_codes); i++) {
		if (strncmp(iso_codes[i].code, iso_name, strlen(iso_codes[i].code)) == 0) {
			/* We found a match, so let's use it. */
			ret = iso_codes[i].grfLangID;
			break;
		}
	}
	_currentLangID = ret;
}

bool CheckGrfLangID(byte lang_id, byte grf_version)
{
	if (grf_version < 7) {
		switch (_currentLangID) {
			case GRFLX_GERMAN:  return (lang_id & GRFLB_GERMAN)  != 0;
			case GRFLX_FRENCH:  return (lang_id & GRFLB_FRENCH)  != 0;
			case GRFLX_SPANISH: return (lang_id & GRFLB_SPANISH) != 0;
			default:            return (lang_id & (GRFLB_ENGLISH | GRFLB_AMERICAN)) != 0;
		}
	}

	return (lang_id == _currentLangID || lang_id == GRFLX_UNSPECIFIED);
}

/**
 * House cleaning.
 * Remove all strings and reset the text counter.
 */
void CleanUpStrings()
{
	uint id;

	for (id = 0; id < _num_grf_texts; id++) {
		GRFText *grftext = _grf_text[id].textholder;
		while (grftext != NULL) {
			GRFText *grftext2 = grftext->next;
			delete grftext;
			grftext = grftext2;
		}
		_grf_text[id].grfid      = 0;
		_grf_text[id].stringid   = 0;
		_grf_text[id].textholder = NULL;
	}

	_num_grf_texts = 0;
}

struct TextRefStack {
	byte stack[0x30];
	byte position;
	bool used;

	TextRefStack() : used(false) {}

	uint8  PopUnsignedByte()  { assert(this->position < lengthof(this->stack)); return this->stack[this->position++]; }
	int8   PopSignedByte()    { return (int8)this->PopUnsignedByte(); }

	uint16 PopUnsignedWord()
	{
		uint16 val = this->PopUnsignedByte();
		return val | (this->PopUnsignedByte() << 8);
	}
	int16  PopSignedWord()    { return (int32)this->PopUnsignedWord(); }

	uint32 PopUnsignedDWord()
	{
		uint32 val = this->PopUnsignedWord();
		return val | (this->PopUnsignedWord() << 16);
	}
	int32  PopSignedDWord()   { return (int32)this->PopUnsignedDWord(); }

	uint64 PopUnsignedQWord()
	{
		uint64 val = this->PopUnsignedDWord();
		return val | (((uint64)this->PopUnsignedDWord()) << 32);
	}
	int64  PopSignedQWord()   { return (int64)this->PopUnsignedQWord(); }

	/** Rotate the top four words down: W1, W2, W3, W4 -> W4, W1, W2, W3 */
	void RotateTop4Words()
	{
		byte tmp[2];
		for (int i = 0; i  < 2; i++) tmp[i] = this->stack[this->position + i + 6];
		for (int i = 5; i >= 0; i--) this->stack[this->position + i + 2] = this->stack[this->position + i];
		for (int i = 0; i  < 2; i++) this->stack[this->position + i] = tmp[i];
	}

	void PushWord(uint16 word)
	{
		if (this->position >= 2) {
			this->position -= 2;
		} else {
			for (uint i = lengthof(stack) - 3; i >= this->position; i--) {
				this->stack[this->position + 2] = this->stack[this->position];
			}
		}
		this->stack[this->position]     = GB(word, 0, 8);
		this->stack[this->position + 1] = GB(word, 8, 8);
	}

	void ResetStack()  { this->position = 0; this->used = true; }
	void RewindStack() { this->position = 0; }
};

static TextRefStack _newgrf_normal_textrefstack;
static TextRefStack _newgrf_error_textrefstack;

/** The stack that is used for TTDP compatible string code parsing */
static TextRefStack *_newgrf_textrefstack = &_newgrf_normal_textrefstack;

/**
 * Prepare the TTDP compatible string code parsing
 * @param numEntries number of entries to copy from the registers
 */
void PrepareTextRefStackUsage(byte numEntries)
{
	extern TemporaryStorageArray<uint32, 0x110> _temp_store;

	_newgrf_textrefstack->ResetStack();

	byte *p = _newgrf_textrefstack->stack;
	for (uint i = 0; i < numEntries; i++) {
		for (uint j = 0; j < 32; j += 8) {
			*p = GB(_temp_store.Get(0x100 + i), j, 8);
			p++;
		}
	}
}

/** Stop using the TTDP compatible string code parsing */
void StopTextRefStackUsage() { _newgrf_textrefstack->used = false; }

void SwitchToNormalRefStack()
{
	_newgrf_textrefstack = &_newgrf_normal_textrefstack;
}

void SwitchToErrorRefStack()
{
	_newgrf_textrefstack = &_newgrf_error_textrefstack;
}

void RewindTextRefStack()
{
	_newgrf_textrefstack->RewindStack();
}

/**
 * FormatString for NewGRF specific "magic" string control codes
 * @param scc   the string control code that has been read
 * @param stack the current "stack"
 * @return the string control code to "execute" now
 */
uint RemapNewGRFStringControlCode(uint scc, char **buff, const char **str, int64 *argv)
{
	if (_newgrf_textrefstack->used) {
		switch (scc) {
			default: NOT_REACHED();
			case SCC_NEWGRF_PRINT_SIGNED_BYTE:    *argv = _newgrf_textrefstack->PopSignedByte();    break;
			case SCC_NEWGRF_PRINT_SIGNED_WORD:    *argv = _newgrf_textrefstack->PopSignedWord();    break;
			case SCC_NEWGRF_PRINT_QWORD_CURRENCY: *argv = _newgrf_textrefstack->PopUnsignedQWord(); break;

			case SCC_NEWGRF_PRINT_DWORD_CURRENCY:
			case SCC_NEWGRF_PRINT_DWORD:          *argv = _newgrf_textrefstack->PopSignedDWord();   break;

			case SCC_NEWGRF_PRINT_WORD_SPEED:
			case SCC_NEWGRF_PRINT_WORD_LITRES:
			case SCC_NEWGRF_PRINT_UNSIGNED_WORD:  *argv = _newgrf_textrefstack->PopUnsignedWord();  break;

			case SCC_NEWGRF_PRINT_DATE:
			case SCC_NEWGRF_PRINT_MONTH_YEAR:     *argv = _newgrf_textrefstack->PopSignedWord() + DAYS_TILL_ORIGINAL_BASE_YEAR; break;

			case SCC_NEWGRF_DISCARD_WORD:         _newgrf_textrefstack->PopUnsignedWord(); break;

			case SCC_NEWGRF_ROTATE_TOP_4_WORDS:   _newgrf_textrefstack->RotateTop4Words(); break;
			case SCC_NEWGRF_PUSH_WORD:            _newgrf_textrefstack->PushWord(Utf8Consume(str)); break;
			case SCC_NEWGRF_UNPRINT:              *buff -= Utf8Consume(str); break;

			case SCC_NEWGRF_PRINT_STRING_ID:
				*argv = _newgrf_textrefstack->PopUnsignedWord();
				if (*argv == STR_NULL) *argv = STR_EMPTY;
				break;
		}
	}

	switch (scc) {
		default: NOT_REACHED();
		case SCC_NEWGRF_PRINT_DWORD:
		case SCC_NEWGRF_PRINT_SIGNED_WORD:
		case SCC_NEWGRF_PRINT_SIGNED_BYTE:
		case SCC_NEWGRF_PRINT_UNSIGNED_WORD:
			return SCC_NUM;

		case SCC_NEWGRF_PRINT_DWORD_CURRENCY:
		case SCC_NEWGRF_PRINT_QWORD_CURRENCY:
			return SCC_CURRENCY;

		case SCC_NEWGRF_PRINT_STRING_ID:
			return SCC_STRING1;

		case SCC_NEWGRF_PRINT_DATE:
			return SCC_DATE_LONG;

		case SCC_NEWGRF_PRINT_MONTH_YEAR:
			return SCC_DATE_TINY;

		case SCC_NEWGRF_PRINT_WORD_SPEED:
			return SCC_VELOCITY;

		case SCC_NEWGRF_PRINT_WORD_LITRES:
			return SCC_VOLUME;

		case SCC_NEWGRF_DISCARD_WORD:
		case SCC_NEWGRF_ROTATE_TOP_4_WORDS:
		case SCC_NEWGRF_PUSH_WORD:
		case SCC_NEWGRF_UNPRINT:
			return 0;
	}
}