aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/libraries/irrlicht-1.8.1/tools/GUIEditor/CMemoryReadWriteFile.cpp
blob: 0a69587ed8f921af0ab621e9e0d6a8dfa4946c3b (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
// Copyright (C) 2002-2012 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in irrlicht.h

#include "CMemoryReadWriteFile.h"

using namespace irr;
using namespace io;

CMemoryReadWriteFile::CMemoryReadWriteFile(const c8* filename)
:  Data(), FileName(filename), Pos(0)
{
}


s32 CMemoryReadWriteFile::write(const void* buffer, u32 sizeToWrite)
{
	// no point in writing 0 bytes
	if (sizeToWrite < 1)
		return 0;

	// expand size
	if (Pos + sizeToWrite > Data.size())
		Data.set_used(Pos+sizeToWrite);

	// copy data
	memcpy( (void*) &Data[Pos], buffer, (size_t) sizeToWrite);

	Pos += sizeToWrite;

	return sizeToWrite;

}

bool CMemoryReadWriteFile::seek(long finalPos, bool relativeMovement)
{
	if (relativeMovement)
	{
		if (finalPos + Pos < 0)
			return 0;
		else
			Pos += finalPos;
	}
	else
	{
		Pos = finalPos;
	}

	if (Pos > (s32)Data.size())
		Data.set_used(Pos+1);

	return true;

}

const io::path& CMemoryReadWriteFile::getFileName() const
{
	return FileName;
}

long CMemoryReadWriteFile::getPos() const
{
	return Pos;
}

core::array<c8>& CMemoryReadWriteFile::getData()
{
	return Data;
}


long CMemoryReadWriteFile::getSize() const
{
	return Data.size();
}


s32 CMemoryReadWriteFile::read(void* buffer, u32 sizeToRead)
{
	// cant read past the end
	if (Pos + sizeToRead >= Data.size())
		sizeToRead = Data.size() - Pos;

	// cant read 0 bytes
	if (!sizeToRead)
		return 0;

	// copy data
	memcpy( buffer, (void*) &Data[Pos], (size_t) sizeToRead);

	Pos += sizeToRead;

	return sizeToRead;
}