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#pragma once
#include <stdarg.h>
#include <typeinfo>
#include <functional>
#ifndef _MSC_VER
#include <cxxabi.h>
#else
#include <intrin.h>
#endif
#include <BString.h>
#include <vector>
namespace Balau {
class ClassName {
public:
template<typename T> ClassName(T * ptr);
~ClassName() { free(m_demangled); }
const char * c_str() const { return m_demangled; }
private:
char * m_demangled;
};
class GeneralException {
public:
GeneralException(const char * msg, const char * details = NULL, bool notrace = false) : m_msg(msg ? ::strdup(msg) : NULL) { setDetails(details); if (!notrace) genTrace(); }
GeneralException(const String & msg, const char * details = NULL, bool notrace = false) : m_msg(msg.strdup()) { setDetails(details); if (!notrace) genTrace(); }
GeneralException(const GeneralException & e) : m_msg(e.m_msg ? strdup(e.m_msg) : NULL), m_trace(e.m_trace) { setDetails(e.m_details); }
GeneralException(GeneralException && e) : m_msg(e.m_msg), m_trace(e.m_trace), m_details(e.m_details) { e.m_msg = e.m_details = NULL; }
// don't hate me, this is to generate typeinfo in the getMsg() case where there's no message.
virtual ~GeneralException() { if (m_msg) free(m_msg); if (m_details) free(m_details); }
const char * getMsg() const {
if (!m_msg)
m_msg = ::strdup(ClassName(this).c_str());
return m_msg;
}
const char * getDetails() const { return m_details; }
const std::vector<String> getTrace() const { return m_trace; }
protected:
explicit GeneralException() { }
void setMsg(char * msg) { if (m_msg) free(m_msg); m_msg = msg; }
void genTrace();
private:
mutable char * m_msg = NULL;
char * m_details = NULL;
std::vector<String> m_trace;
void setDetails(const char * details) {
if (details)
m_details = ::strdup(details);
else
m_details = NULL;
}
};
class RessourceException : public GeneralException {
public:
RessourceException(const String & msg, const char * details) : GeneralException(msg, details) { }
};
void ExitHelper(const String & msg, const char * fmt = NULL, ...) printfwarning(2, 3);
static inline void * malloc(size_t size) {
void * r = ::malloc(size);
if (!r && size)
ExitHelper("Failed to allocate memory", "%zu bytes", size);
return r;
}
static inline void * calloc(size_t count, size_t size) {
void * r = ::calloc(count, size);
if (!r && ((count * size) != 0))
ExitHelper("Failed to allocate memory", "%zu * %zu = %zu bytes", count, size, count * size);
return r;
}
static inline void * realloc(void * previous, size_t size) {
void * r = ::realloc(previous, size);
if (!r && size)
ExitHelper("Failed to re-allocate memory", "%zu bytes", size);
return r;
}
static inline void AssertHelperInner(const String & msg, const char * details = NULL) throw (GeneralException) {
#if defined(_MSC_VER) && defined(DEBUG)
__debugbreak();
#endif
throw GeneralException(msg, details);
}
static inline void AssertHelper(const String & msg, const char * fmt, ...) printfwarning(2, 3);
static inline void AssertHelper(const String & msg, const char * fmt, ...) {
String details;
va_list ap;
va_start(ap, fmt);
details.set(fmt, ap);
va_end(ap);
AssertHelperInner(msg, details.to_charp());
}
static inline void AssertHelper(const String & msg) {
AssertHelperInner(msg);
}
class TestException : public GeneralException {
public:
TestException(const String & msg) : GeneralException(msg) { }
};
static inline void TestHelper(const String & msg) throw (TestException) {
throw TestException(msg);
}
template<typename T>
ClassName::ClassName(T * ptr) {
#ifdef _MSC_VER
m_demangled = strdup(typeid(*ptr).name());
#else
int status;
m_demangled = abi::__cxa_demangle(typeid(*ptr).name(), 0, 0, &status);
#endif
}
};
#ifdef _MSC_VER
#define likely(expr) (expr)
#define unlikely(expr) (expr)
#else
#define likely(expr) __builtin_expect((expr), !0)
#define unlikely(expr) __builtin_expect((expr), 0)
#endif
#define Failure(msg) Balau::AssertHelper(msg);
#define FailureDetails(msg, ...) Balau::AssertHelper(msg, __VA_ARGS__);
#define IAssert(c, ...) if (unlikely(!(c))) { \
Balau::String msg; \
msg.set("Internal Assertion " #c " failed at %s:%i", __FILE__, __LINE__); \
Balau::AssertHelper(msg, __VA_ARGS__); \
}
#define AAssert(c, ...) if (unlikely(!(c))) { \
Balau::String msg; \
msg.set("API Assertion " #c " failed at %s:%i", __FILE__, __LINE__); \
Balau::AssertHelper(msg, __VA_ARGS__); \
}
#define RAssert(c, ...) if (unlikely(!(c))) { \
Balau::String msg; \
msg.set("Ressource Assertion " #c " failed at %s:%i", __FILE__, __LINE__); \
Balau::ExitHelper(msg, __VA_ARGS__); \
}
#define EAssert(c, ...) if (unlikely(!(c))) { \
Balau::String msg; \
msg.set("Execution Assertion " #c " failed at %s:%i", __FILE__, __LINE__); \
Balau::AssertHelper(msg, __VA_ARGS__); \
}
#define TAssert(c) if (unlikely(!(c))) { \
Balau::String msg; \
msg.set("UnitTest Assert " #c " failed at %s:%i", __FILE__, __LINE__); \
Balau::TestHelper(msg); \
}
class ScopedLambda {
public:
ScopedLambda(std::function<void()> l) : m_l(l) { }
~ScopedLambda() { m_l(); }
private:
std::function<void()> m_l;
};
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