summaryrefslogtreecommitdiffstats
path: root/src/WorldStorage/SchematicFileSerializer.cpp
blob: 115b2e8697ef8770a7e4c456c925f2852f7eca9c (plain) (blame)
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

// SchematicFileSerializer.cpp

// Implements the cSchematicFileSerializer class representing the interface to load and save cBlockArea to a .schematic file

#include "Globals.h"

#include "OSSupport/GZipFile.h"
#include "FastNBT.h"
#include "SchematicFileSerializer.h"
#include "../StringCompression.h"





#ifdef SELF_TEST

static class cSchematicStringSelfTest
{
public:
	cSchematicStringSelfTest(void)
	{
		cBlockArea ba;
		ba.Create(21, 256, 21);
		ba.RelLine(0, 0, 0, 9, 8, 7, cBlockArea::baTypes | cBlockArea::baMetas, E_BLOCK_WOODEN_STAIRS, 1);
		AString Schematic;
		if (!cSchematicFileSerializer::SaveToSchematicString(ba, Schematic))
		{
			assert_test(!"Schematic failed to save!");
		}
		cBlockArea ba2;
		if (!cSchematicFileSerializer::LoadFromSchematicString(ba2, Schematic))
		{
			assert_test(!"Schematic failed to load!");
		}
	}
} g_SelfTest;

#endif






///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// cSchematicFileSerializer:

bool cSchematicFileSerializer::LoadFromSchematicFile(cBlockArea & a_BlockArea, const AString & a_FileName)
{
	// Un-GZip the contents:
	AString Contents;
	cGZipFile File;
	if (!File.Open(a_FileName, cGZipFile::fmRead))
	{
		LOG("Cannot open the schematic file \"%s\".", a_FileName.c_str());
		return false;
	}
	int NumBytesRead = File.ReadRestOfFile(Contents);
	if (NumBytesRead < 0)
	{
		LOG("Cannot read GZipped data in the schematic file \"%s\", error %d", a_FileName.c_str(), NumBytesRead);
		return false;
	}
	File.Close();
	
	// Parse the NBT:
	cParsedNBT NBT(Contents.data(), Contents.size());
	if (!NBT.IsValid())
	{
		LOG("Cannot parse the NBT in the schematic file \"%s\".", a_FileName.c_str());
		return false;
	}
	
	return LoadFromSchematicNBT(a_BlockArea, NBT);
}






bool cSchematicFileSerializer::LoadFromSchematicString(cBlockArea & a_BlockArea, const AString & a_SchematicData)
{
	// Uncompress the data:
	AString UngzippedData;
	if (UncompressStringGZIP(a_SchematicData.data(), a_SchematicData.size(), UngzippedData) != Z_OK)
	{
		LOG("%s: Cannot unGZip the schematic data.", __FUNCTION__);
		return false;
	}

	// Parse the NBT:
	cParsedNBT NBT(UngzippedData.data(), UngzippedData.size());
	if (!NBT.IsValid())
	{
		LOG("%s: Cannot parse the NBT in the schematic data.", __FUNCTION__);
		return false;
	}
	
	return LoadFromSchematicNBT(a_BlockArea, NBT);
}





bool cSchematicFileSerializer::SaveToSchematicFile(const cBlockArea & a_BlockArea, const AString & a_FileName)
{
	// Serialize into NBT data:
	AString NBT = SaveToSchematicNBT(a_BlockArea);
	if (NBT.empty())
	{
		LOG("%s: Cannot serialize the area into an NBT representation for file \"%s\".", __FUNCTION__, a_FileName.c_str());
		return false;
	}
	
	// Save to file
	cGZipFile File;
	if (!File.Open(a_FileName, cGZipFile::fmWrite))
	{
		LOG("%s: Cannot open file \"%s\" for writing.", __FUNCTION__, a_FileName.c_str());
		return false;
	}
	if (!File.Write(NBT))
	{
		LOG("%s: Cannot write data to file \"%s\".", __FUNCTION__, a_FileName.c_str());
		return false;
	}
	return true;
}






bool cSchematicFileSerializer::SaveToSchematicString(const cBlockArea & a_BlockArea, AString & a_Out)
{
	// Serialize into NBT data:
	AString NBT = SaveToSchematicNBT(a_BlockArea);
	if (NBT.empty())
	{
		LOG("%s: Cannot serialize the area into an NBT representation.", __FUNCTION__);
		return false;
	}
	
	// Gzip the data:
	int res = CompressStringGZIP(NBT.data(), NBT.size(), a_Out);
	if (res != Z_OK)
	{
		LOG("%s: Cannot Gzip the area data NBT representation: %d", __FUNCTION__, res);
		return false;
	}
	return true;
}





bool cSchematicFileSerializer::LoadFromSchematicNBT(cBlockArea & a_BlockArea, cParsedNBT & a_NBT)
{
	int TMaterials = a_NBT.FindChildByName(a_NBT.GetRoot(), "Materials");
	if ((TMaterials > 0) && (a_NBT.GetType(TMaterials) == TAG_String))
	{
		AString Materials = a_NBT.GetString(TMaterials);
		if (Materials.compare("Alpha") != 0)
		{
			LOG("Materials tag is present and \"%s\" instead of \"Alpha\". Possibly a wrong-format schematic file.", Materials.c_str());
			return false;
		}
	}
	int TSizeX = a_NBT.FindChildByName(a_NBT.GetRoot(), "Width");
	int TSizeY = a_NBT.FindChildByName(a_NBT.GetRoot(), "Height");
	int TSizeZ = a_NBT.FindChildByName(a_NBT.GetRoot(), "Length");
	if (
		(TSizeX < 0) || (TSizeY < 0) || (TSizeZ < 0) ||
		(a_NBT.GetType(TSizeX) != TAG_Short) ||
		(a_NBT.GetType(TSizeY) != TAG_Short) ||
		(a_NBT.GetType(TSizeZ) != TAG_Short)
	)
	{
		LOG("Dimensions are missing from the schematic file (%d, %d, %d), (%d, %d, %d)",
			TSizeX, TSizeY, TSizeZ,
			a_NBT.GetType(TSizeX), a_NBT.GetType(TSizeY), a_NBT.GetType(TSizeZ)
		);
		return false;
	}
	
	int SizeX = a_NBT.GetShort(TSizeX);
	int SizeY = a_NBT.GetShort(TSizeY);
	int SizeZ = a_NBT.GetShort(TSizeZ);
	if ((SizeX < 1) || (SizeX > 65535) || (SizeY < 1) || (SizeY > 256) || (SizeZ < 1) || (SizeZ > 65535))
	{
		LOG("Dimensions are invalid in the schematic file: %d, %d, %d", SizeX, SizeY, SizeZ);
		return false;
	}
	
	int TBlockTypes = a_NBT.FindChildByName(a_NBT.GetRoot(), "Blocks");
	int TBlockMetas = a_NBT.FindChildByName(a_NBT.GetRoot(), "Data");
	if ((TBlockTypes < 0) || (a_NBT.GetType(TBlockTypes) != TAG_ByteArray))
	{
		LOG("BlockTypes are invalid in the schematic file: %d", TBlockTypes);
		return false;
	}
	bool AreMetasPresent = (TBlockMetas > 0) && (a_NBT.GetType(TBlockMetas) == TAG_ByteArray);
	
	a_BlockArea.Clear();
	a_BlockArea.SetSize(SizeX, SizeY, SizeZ, AreMetasPresent ? (cBlockArea::baTypes | cBlockArea::baMetas) : cBlockArea::baTypes);
	
	int TOffsetX = a_NBT.FindChildByName(a_NBT.GetRoot(), "WEOffsetX");
	int TOffsetY = a_NBT.FindChildByName(a_NBT.GetRoot(), "WEOffsetY");
	int TOffsetZ = a_NBT.FindChildByName(a_NBT.GetRoot(), "WEOffsetZ");
	
	if (
		(TOffsetX < 0) || (TOffsetY < 0) || (TOffsetZ < 0) ||
		(a_NBT.GetType(TOffsetX) != TAG_Int) ||
		(a_NBT.GetType(TOffsetY) != TAG_Int) ||
		(a_NBT.GetType(TOffsetZ) != TAG_Int)
	)
	{
		// Not every schematic file has an offset, so we shoudn't give a warn message.
		a_BlockArea.SetWEOffset(0, 0, 0);
	}
	else
	{
		a_BlockArea.SetWEOffset(a_NBT.GetInt(TOffsetX), a_NBT.GetInt(TOffsetY), a_NBT.GetInt(TOffsetZ));
	}

	// Copy the block types and metas:
	int NumBytes = a_BlockArea.GetBlockCount();
	if (a_NBT.GetDataLength(TBlockTypes) < NumBytes)
	{
		LOG("BlockTypes truncated in the schematic file (exp %d, got %d bytes). Loading partial.",
			NumBytes, a_NBT.GetDataLength(TBlockTypes)
		);
		NumBytes = a_NBT.GetDataLength(TBlockTypes);
	}
	memcpy(a_BlockArea.m_BlockTypes, a_NBT.GetData(TBlockTypes), NumBytes);
	
	if (AreMetasPresent)
	{
		int NumBytes = a_BlockArea.GetBlockCount();
		if (a_NBT.GetDataLength(TBlockMetas) < NumBytes)
		{
			LOG("BlockMetas truncated in the schematic file (exp %d, got %d bytes). Loading partial.",
				NumBytes, a_NBT.GetDataLength(TBlockMetas)
			);
			NumBytes = a_NBT.GetDataLength(TBlockMetas);
		}
		memcpy(a_BlockArea.m_BlockMetas, a_NBT.GetData(TBlockMetas), NumBytes);
	}
	
	return true;
}





AString cSchematicFileSerializer::SaveToSchematicNBT(const cBlockArea & a_BlockArea)
{
	cFastNBTWriter Writer("Schematic");
	Writer.AddShort("Width",  a_BlockArea.m_Size.x);
	Writer.AddShort("Height", a_BlockArea.m_Size.y);
	Writer.AddShort("Length", a_BlockArea.m_Size.z);
	Writer.AddString("Materials", "Alpha");
	if (a_BlockArea.HasBlockTypes())
	{
		Writer.AddByteArray("Blocks", (const char *)a_BlockArea.m_BlockTypes, a_BlockArea.GetBlockCount());
	}
	else
	{
		AString Dummy(a_BlockArea.GetBlockCount(), 0);
		Writer.AddByteArray("Blocks", Dummy.data(), Dummy.size());
	}
	if (a_BlockArea.HasBlockMetas())
	{
		Writer.AddByteArray("Data", (const char *)a_BlockArea.m_BlockMetas, a_BlockArea.GetBlockCount());
	}
	else
	{
		AString Dummy(a_BlockArea.GetBlockCount(), 0);
		Writer.AddByteArray("Data", Dummy.data(), Dummy.size());
	}
	
	Writer.AddInt("WEOffsetX", a_BlockArea.m_WEOffset.x);
	Writer.AddInt("WEOffsetY", a_BlockArea.m_WEOffset.y);
	Writer.AddInt("WEOffsetZ", a_BlockArea.m_WEOffset.z);

	// TODO: Save entities and block entities
	Writer.BeginList("Entities", TAG_Compound);
	Writer.EndList();
	Writer.BeginList("TileEntities", TAG_Compound);
	Writer.EndList();
	Writer.Finish();
	
	return Writer.GetResult();
}