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#include <stdarg.h>
#include "exception.h"
namespace JinEngine
{
Exception::Exception(const char *fmt, ...)
{
va_list args;
int size_buffer = 256, size_out;
char *buffer;
while (true)
{
buffer = new char[size_buffer];
memset(buffer, 0, size_buffer);
va_start(args, fmt);
size_out = vsnprintf(buffer, size_buffer, fmt, args);
va_end(args);
// see http://perfec.to/vsnprintf/pasprintf.c
// if size_out ...
// == -1 --> output was truncated
// == size_buffer --> output was truncated
// == size_buffer-1 --> ambiguous, /may/ have been truncated
// > size_buffer --> output was truncated, and size_out
// bytes would have been written
if (size_out == size_buffer || size_out == -1 || size_out == size_buffer - 1)
size_buffer *= 2;
else if (size_out > size_buffer)
size_buffer = size_out + 2; // to avoid the ambiguous case
else
break;
delete[] buffer;
}
mMessage = std::string(buffer);
delete[] buffer;
}
Exception::~Exception() throw()
{
}
} // namespace JinEngine
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