Exception.cc

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#include "Exception.hh"

#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>

namespace crl {
namespace multisense {
namespace details {
namespace utility {

#ifndef NEED_VASPRINTF
#define NEED_VASPRINTF 0
#endif

#if NEED_VASPRINTF
int vasprintf (char** strp, const char* fmt, va_list ap)
{
    int len = _vscprintf (fmt, ap);
    if (len < 0)
    {
        *strp = NULL;
        return len;
    }

    *strp = (char*)malloc ((size_t)len + 1);
    if (*strp == NULL)
    {
        return -1;
    }

    len = _vsnprintf (*strp, (size_t)len + 1, fmt, ap);
    if (len < 0)
    {
        free (*strp);
        *strp = NULL;
    }

    return len;
}
#endif

Exception::Exception(const char *failureReason, ...)
{
    char   *stringP;
    va_list ap;
    int returnValue;

    va_start(ap, failureReason);
    returnValue = vasprintf(&stringP, failureReason, ap);
    va_end(ap);
    
    if ((NULL != stringP) && (returnValue != -1)) {
        reason = std::string(stringP);
        free(stringP);
    }
}

Exception::Exception(const std::string& failureReason)
{
    reason = failureReason;
}

Exception::~Exception() throw()
{
    // Empty.
}

const char* Exception::what() const throw()
{
    return this->reason.c_str();
}

}}}} // namespaces