1/**
2 * Copyright (c) 2006-2023 LOVE Development Team
3 *
4 * This software is provided 'as-is', without any express or implied
5 * warranty. In no event will the authors be held liable for any damages
6 * arising from the use of this software.
7 *
8 * Permission is granted to anyone to use this software for any purpose,
9 * including commercial applications, and to alter it and redistribute it
10 * freely, subject to the following restrictions:
11 *
12 * 1. The origin of this software must not be misrepresented; you must not
13 * claim that you wrote the original software. If you use this software
14 * in a product, an acknowledgment in the product documentation would be
15 * appreciated but is not required.
16 * 2. Altered source versions must be plainly marked as such, and must not be
17 * misrepresented as being the original software.
18 * 3. This notice may not be removed or altered from any source distribution.
19 **/
20
21#include "File.h"
22
23namespace love
24{
25namespace filesystem
26{
27
28love::Type File::type("File", &Object::type);
29
30File::~File()
31{
32}
33
34FileData *File::read(int64 size)
35{
36 bool isopen = isOpen();
37
38 if (!isopen && !open(MODE_READ))
39 throw love::Exception("Could not read file %s.", getFilename().c_str());
40
41 int64 max = getSize();
42 int64 cur = tell();
43 size = (size == ALL) ? max : size;
44
45 if (size < 0)
46 throw love::Exception("Invalid read size.");
47
48 // Clamping because the file offset may be in a weird position.
49 if (cur < 0)
50 cur = 0;
51 else if (cur > max)
52 cur = max;
53
54 if (cur + size > max)
55 size = max - cur;
56
57 FileData *fileData = new FileData(size, getFilename());
58 int64 bytesRead = read(fileData->getData(), size);
59
60 if (bytesRead < 0 || (bytesRead == 0 && bytesRead != size))
61 {
62 delete fileData;
63 throw love::Exception("Could not read from file.");
64 }
65
66 if (bytesRead < size)
67 {
68 FileData *tmpFileData = new FileData(bytesRead, getFilename());
69 memcpy(tmpFileData->getData(), fileData->getData(), (size_t) bytesRead);
70 fileData->release();
71 fileData = tmpFileData;
72 }
73
74 if (!isopen)
75 close();
76
77 return fileData;
78}
79
80bool File::write(const Data *data, int64 size)
81{
82 return write(data->getData(), (size == ALL) ? data->getSize() : size);
83}
84
85std::string File::getExtension() const
86{
87 const std::string &filename = getFilename();
88 std::string::size_type idx = filename.rfind('.');
89
90 if (idx != std::string::npos)
91 return filename.substr(idx+1);
92 else
93 return std::string();
94}
95
96bool File::getConstant(const char *in, Mode &out)
97{
98 return modes.find(in, out);
99}
100
101bool File::getConstant(Mode in, const char *&out)
102{
103 return modes.find(in, out);
104}
105
106std::vector<std::string> File::getConstants(Mode)
107{
108 return modes.getNames();
109}
110
111bool File::getConstant(const char *in, BufferMode &out)
112{
113 return bufferModes.find(in, out);
114}
115
116bool File::getConstant(BufferMode in, const char *&out)
117{
118 return bufferModes.find(in, out);
119}
120
121std::vector<std::string> File::getConstants(BufferMode)
122{
123 return bufferModes.getNames();
124}
125
126StringMap<File::Mode, File::MODE_MAX_ENUM>::Entry File::modeEntries[] =
127{
128 { "c", MODE_CLOSED },
129 { "r", MODE_READ },
130 { "w", MODE_WRITE },
131 { "a", MODE_APPEND },
132};
133
134StringMap<File::Mode, File::MODE_MAX_ENUM> File::modes(File::modeEntries, sizeof(File::modeEntries));
135
136StringMap<File::BufferMode, File::BUFFER_MAX_ENUM>::Entry File::bufferModeEntries[] =
137{
138 { "none", BUFFER_NONE },
139 { "line", BUFFER_LINE },
140 { "full", BUFFER_FULL },
141};
142
143StringMap<File::BufferMode, File::BUFFER_MAX_ENUM> File::bufferModes(File::bufferModeEntries, sizeof(File::bufferModeEntries));
144
145} // filesystem
146} // love
147