(svn r10211) -Feature: [NewGRF] Add support for action 0F

src/newgrf_townname.cpp

@@ -0,0 +1,132 @@
+/* $Id$ */
+
+/** @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 "string.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;
+}