summaryrefslogtreecommitdiff
path: root/src/newgrf_townname.cpp
blob: fdaa6623044b0be0b8298923c0beabc9c6f75692 (plain)
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
/* $Id$ */

/** @file newgrf_townname.cpp
 * Implementation of  Action 0F "universal holder" structure and functions.
 * This file implements a linked-lists of townname generators,
 * holding everything that the newgrf action 0F will send over to OpenTTD.
 */

#include "stdafx.h"
#include "openttd.h"
#include "table/strings.h"
#include "newgrf_townname.h"
#include "core/alloc_func.hpp"
#include "string_func.h"

static GRFTownName *_grf_townnames = NULL;

GRFTownName *GetGRFTownName(uint32 grfid)
{
	GRFTownName *t = _grf_townnames;
	for (; t != NULL; t = t->next) {
		if (t->grfid == grfid) return t;
	}
	return NULL;
}

GRFTownName *AddGRFTownName(uint32 grfid)
{
	GRFTownName *t = GetGRFTownName(grfid);
	if (t == NULL) {
		t = CallocT<GRFTownName>(1);
		t->grfid = grfid;
		t->next = _grf_townnames;
		_grf_townnames = t;
	}
	return t;
}

void DelGRFTownName(uint32 grfid)
{
	GRFTownName *t = _grf_townnames;
	GRFTownName *p = NULL;
	for (;t != NULL; p = t, t = t->next) if (t->grfid == grfid) break;
	if (t != NULL) {
		for (int i = 0; i < 128; i++) {
			for (int j = 0; j < t->nbparts[i]; j++) {
				for (int k = 0; k < t->partlist[i][j].partcount; k++) {
					if (!HasBit(t->partlist[i][j].parts[k].prob, 7)) free(t->partlist[i][j].parts[k].data.text);
				}
				free(t->partlist[i][j].parts);
			}
			free(t->partlist[i]);
		}
		if (p != NULL) {
			p->next = t->next;
		} else {
			_grf_townnames = t->next;
		}
		free(t);
	}
}

static char *RandomPart(char *buf, GRFTownName *t, uint32 seed, byte id, const char *last)
{
	assert(t != NULL);
	for (int i = 0; i < t->nbparts[id]; i++) {
		byte count = t->partlist[id][i].bitcount;
		uint16 maxprob = t->partlist[id][i].maxprob;
		uint32 r = (GB(seed, t->partlist[id][i].bitstart, count) * maxprob) >> count;
		for (int j = 0; j < t->partlist[id][i].partcount; j++) {
			byte prob = t->partlist[id][i].parts[j].prob;
			maxprob -= GB(prob, 0, 7);
			if (maxprob > r) continue;
			if (HasBit(prob, 7)) {
				buf = RandomPart(buf, t, seed, t->partlist[id][i].parts[j].data.id, last);
			} else {
				buf = strecat(buf, t->partlist[id][i].parts[j].data.text, last);
			}
			break;
		}
	}
	return buf;
}

char *GRFTownNameGenerate(char *buf, uint32 grfid, uint16 gen, uint32 seed, const char *last)
{
	strecpy(buf, "", last);
	for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
		if (t->grfid == grfid) {
			assert(gen < t->nb_gen);
			buf = RandomPart(buf, t, seed, t->id[gen], last);
			break;
		}
	}
	return buf;
}

StringID *GetGRFTownNameList()
{
	int nb_names = 0, n = 0;
	for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) nb_names += t->nb_gen;
	StringID *list = MallocT<StringID>(nb_names + 1);
	for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
		for (int j = 0; j < t->nb_gen; j++) list[n++] = t->name[j];
	}
	list[n] = INVALID_STRING_ID;
	return list;
}

void CleanUpGRFTownNames()
{
	while (_grf_townnames != NULL) DelGRFTownName(_grf_townnames->grfid);
}

uint32 GetGRFTownNameId(int gen)
{
	for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
		if (gen < t->nb_gen) return t->grfid;
		gen -= t->nb_gen;
	}
	/* Fallback to no NewGRF */
	return 0;
}

uint16 GetGRFTownNameType(int gen)
{
	for (GRFTownName *t = _grf_townnames; t != NULL; t = t->next) {
		if (gen < t->nb_gen) return gen;
		gen -= t->nb_gen;
	}
	/* Fallback to english original */
	return SPECSTR_TOWNNAME_ENGLISH;
}