Exception.hpp

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 * Redistributions in binary form must reproduce the above copyright notice,
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*/


#ifndef _EXCEPTION_HPP_
#define _EXCEPTION_HPP_

#include <string>
#include <sstream>
#include <cfloat>  // For DBL_MAX
#include <climits> // For UINT_MAX & INT_MAX, necessary in gcc-4.3
#include <cstdlib> // Necessary in gcc-4.3 and later which don't include stdlib by default

const unsigned UNSIGNED_UNSET = UINT_MAX;
const int INT_UNSET = INT_MAX;
const double DOUBLE_UNSET = DBL_MAX;

class Exception
{
public:
    Exception(const std::string& rMessage, const std::string& rFilename, unsigned lineNumber);

    std::string GetMessage() const;

    std::string GetShortMessage() const;

    std::string CheckShortMessage(std::string expected) const;

    std::string CheckShortMessageContains(std::string expected) const;

    static void Terminate(const std::string& rMessage, const std::string& rFilename, unsigned lineNumber);

protected:
    void SetMessage(const std::string& rMessage,
                    const std::string& rFilename, unsigned lineNumber);

private:
    std::string mMessage; 
    std::string mShortMessage; 
};

#define EXCEPTION(message)                           \
    do {                                             \
        std::stringstream msg_stream;                \
        msg_stream << message;                       \
        throw Exception(msg_stream.str(), __FILE__, __LINE__); \
    } while (false)

#include <boost/preprocessor/stringize.hpp>

#define EXCEPT_IF_NOT(test) \
    if (!(test)) EXCEPTION("Assertion tripped: " BOOST_PP_STRINGIZE(test))


#define TERMINATE(message)                           \
    do {                                             \
        std::stringstream msg_stream;                \
        msg_stream << message;                       \
        Exception::Terminate(msg_stream.str(), __FILE__, __LINE__); \
    } while (false)

#define NEVER_REACHED  TERMINATE("Should have been impossible to reach this line of code"); exit(EXIT_FAILURE)

#ifdef NDEBUG
#define UNUSED_OPT(var) var=var
#else
#define UNUSED_OPT(var)
#endif

#define ABORT_IF_THROWS(block)          \
    try {                               \
        block;                          \
    } catch (const Exception& e) {      \
        TERMINATE(e.GetMessage());      \
    } catch (const std::exception &e) { \
        TERMINATE(e.what());            \
    } catch (...) {                     \
        TERMINATE("Unexpected exception thrown."); \
    }


// The macros below are deprecated.  In most cases, FileFinder routines should be used
// in preference to system() calls.

#define EXPECT0(cmd, arg) {      \
    std::string _arg(arg);       \
    int retcode = cmd(_arg.c_str()); \
    if (retcode != 0) {              \
        EXCEPTION("Error executing command: " #cmd "(" + _arg + ")"); \
    } }


#define ABORT_IF_NON0_WITH_MSG(retcode, msg)     \
    if (retcode != 0) {                          \
        TERMINATE(msg);                          \
    }

#define ABORT_IF_NON0(cmd, arg) { \
    std::string _arg(arg);        \
    int ret = cmd(_arg.c_str());  \
    ABORT_IF_NON0_WITH_MSG(ret, "Error executing command: " #cmd "(" + _arg + ")") \
    }

#define EXPECT_NON0(cmd, arg) {   \
    std::string _arg = (arg);     \
    int ret = cmd(_arg.c_str());  \
    if (ret == 0) {               \
        EXCEPTION("Command: " #cmd "(" + _arg + ") succeeded and it shouldn't have"); \
    } }

#define IGNORE_RET(cmd, arg) {   \
    std::string _arg = (arg);    \
    int ret = cmd(_arg.c_str()); \
    ret = ret;                   \
    }

#endif // _EXCEPTION_HPP_