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 "common/config.h"
22#include "Exception.h"
23
24#include <iostream>
25
26namespace love
27{
28
29Exception::Exception(const char *fmt, ...)
30{
31 va_list args;
32 int size_buffer = 256, size_out;
33 char *buffer;
34 while (true)
35 {
36 buffer = new char[size_buffer];
37 memset(buffer, 0, size_buffer);
38
39 va_start(args, fmt);
40 size_out = vsnprintf(buffer, size_buffer, fmt, args);
41 va_end(args);
42
43 // see http://perfec.to/vsnprintf/pasprintf.c
44 // if size_out ...
45 // == -1 --> output was truncated
46 // == size_buffer --> output was truncated
47 // == size_buffer-1 --> ambiguous, /may/ have been truncated
48 // > size_buffer --> output was truncated, and size_out
49 // bytes would have been written
50 if (size_out == size_buffer || size_out == -1 || size_out == size_buffer-1)
51 size_buffer *= 2;
52 else if (size_out > size_buffer)
53 size_buffer = size_out + 2; // to avoid the ambiguous case
54 else
55 break;
56
57 delete[] buffer;
58 }
59 message = std::string(buffer);
60 delete[] buffer;
61}
62
63Exception::~Exception() throw()
64{
65}
66
67}
68