summaryrefslogtreecommitdiff
path: root/dggui/resource.cc
blob: 52aca0ac8021610e07643675f4a194b092fc8871 (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
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
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
 *            resource.cc
 *
 *  Sun Mar 17 19:38:04 CET 2013
 *  Copyright 2013 Bent Bisballe Nyeng
 *  deva@aasimon.org
 ****************************************************************************/

/*
 *  This file is part of DrumGizmo.
 *
 *  DrumGizmo is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation; either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  DrumGizmo is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with DrumGizmo; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
 */
#include "resource.h"

#include <hugin.hpp>
#include <cstdio>
#include <climits>

#include <platform.h>

#if DG_PLATFORM != DG_PLATFORM_WINDOWS
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#endif

// rcgen generated file containing rc_data declaration.
#include "resource_data.h"

extern const rc_data_t* rc_data;

namespace GUI
{

// TODO: Replace with std::filesystem::is_regular_file once we update the
// compiler to require C++17
static bool pathIsFile(const std::string& path)
{
#if DG_PLATFORM == DG_PLATFORM_WINDOWS
	return (GetFileAttributesA(path.data()) & FILE_ATTRIBUTE_DIRECTORY) == 0;
#else
	struct stat s;
	if(stat(path.data(), &s) != 0)
	{
		return false; // error
	}

	return (s.st_mode & S_IFREG) != 0; // s.st_mode & S_IFDIR => dir
#endif
}

// Internal resources start with a colon.
static bool nameIsInternal(const std::string& name)
{
	return name.size() && (name[0] == ':');
}

Resource::Resource(const std::string& name)
{
	isValid = false;

	if(nameIsInternal(name))
	{
		// Use internal resource:

		// Find internal resource in rc_data.
		const rc_data_t* p = rc_data;
		while(p && *p->name) // last entry in rc_data has the name := ""
		{
			if(name == p->name)
			{
				internalData = p->data;
				internalSize = p->size;
				break;
			}
			++p;
		}

		// We did not find the named resource.
		if(internalData == nullptr)
		{
			ERR(rc, "Could not find '%s'\n", name.c_str());
			return;
		}

		isInternal = true;
	}
	else
	{
		if(!pathIsFile(name))
		{
			return;
		}

		// Read from file:
		std::FILE *fp = std::fopen(name.data(), "rb");
		if(!fp)
		{
			return;
		}

		// Get the file size
		if(std::fseek(fp, 0, SEEK_END) == -1)
		{
			std::fclose(fp);
			return;
		}

		long filesize = std::ftell(fp);

		// Apparently fseek doesn't fail if fp points to a directory that has been
		// opened (which doesn't fail either!!) and ftell will then fail by either
		// returning -1 or LONG_MAX
		if(filesize == -1L || filesize == LONG_MAX)
		{
			std::fclose(fp);
			return;
		}

		// Reserve space in the string for the data.
		externalData.reserve(filesize);

		// Rewind and read...
		std::rewind(fp);

		char buffer[32];
		while(!std::feof(fp))
		{
			size_t size = std::fread(buffer, 1, sizeof(buffer), fp);
			externalData.append(buffer, size);
		}

		std::fclose(fp);

		isInternal = false;
	}

	isValid = true;
}

const char *Resource::data()
{
	if(isValid == false)
	{
		return nullptr;
	}

	if(isInternal)
	{
		return internalData;
	}
	else
	{
		return externalData.data();
	}
}

size_t Resource::size()
{
	if(isValid == false)
	{
	  return 0;
	}

	if(isInternal)
	{
		return internalSize;
	}
	else
	{
		return externalData.length();
	}
}

bool Resource::valid()
{
	return isValid;
}

} // GUI::