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#pragma once
/**
@file
@brief definition of abstruct exception class
@author MITSUNARI Shigeo(@herumi)
*/
#ifdef CYBOZU_MINIMUM_EXCEPTION
#include <cybozu/inttype.hpp>
namespace cybozu {
namespace exception {
inline const char *makeString(const char *, size_t)
{
return "";
}
} // cybozu::exception
class Exception {
public:
explicit Exception(const char* = 0, bool = true)
{
}
~Exception() CYBOZU_NOEXCEPT {}
const char *what() const CYBOZU_NOEXCEPT { return "cybozu:Exception"; }
template<class T>
Exception& operator<<(const T&)
{
return *this;
}
};
} // cybozu
#else
#include <string>
#include <algorithm>
#include <sstream>
#include <errno.h>
#include <stdio.h>
#ifdef _WIN32
#include <winsock2.h>
#include <windows.h>
#else
#include <string.h> // for strerror_r
#endif
#include <cybozu/inttype.hpp>
#ifdef CYBOZU_EXCEPTION_WITH_STACKTRACE
#include <cybozu/stacktrace.hpp>
#endif
namespace cybozu {
const bool DontThrow = true;
namespace exception {
/* get max 16 characters to avoid buffer overrun */
inline std::string makeString(const char *str, size_t size)
{
return std::string(str, std::min<size_t>(size, 16));
}
#ifdef _WIN32
inline std::string wstr2str(const std::wstring& wstr)
{
std::string str;
for (size_t i = 0; i < wstr.size(); i++) {
uint16_t c = wstr[i];
if (c < 0x80) {
str += char(c);
} else {
char buf[16];
CYBOZU_SNPRINTF(buf, sizeof(buf), "\\u%04x", c);
str += buf;
}
}
return str;
}
#endif
} // cybozu::exception
/**
convert errno to string
@param err [in] errno
@note for both windows and linux
*/
inline std::string ConvertErrorNoToString(int err)
{
char errBuf[256];
std::string ret;
#ifdef _WIN32
if (strerror_s(errBuf, sizeof(errBuf), err) == 0) {
ret = errBuf;
} else {
ret = "err";
}
#elif defined(_GNU_SOURCE)
ret = ::strerror_r(err, errBuf, sizeof(errBuf));
#else
if (strerror_r(err, errBuf, sizeof(errBuf)) == 0) {
ret = errBuf;
} else {
ret = "err";
}
#endif
char buf2[64];
CYBOZU_SNPRINTF(buf2, sizeof(buf2), "(%d)", err);
ret += buf2;
return ret;
}
class Exception : public std::exception {
mutable std::string str_;
#ifdef CYBOZU_EXCEPTION_WITH_STACKTRACE
mutable std::string stackTrace_;
#endif
public:
explicit Exception(const std::string& name = "", bool enableStackTrace = true)
: str_(name)
{
#ifdef CYBOZU_EXCEPTION_WITH_STACKTRACE
if (enableStackTrace) stackTrace_ = cybozu::StackTrace().toString();
#else
cybozu::disable_warning_unused_variable(enableStackTrace);
#endif
}
~Exception() CYBOZU_NOEXCEPT {}
const char *what() const CYBOZU_NOEXCEPT { return toString().c_str(); }
const std::string& toString() const CYBOZU_NOEXCEPT
{
#ifdef CYBOZU_EXCEPTION_WITH_STACKTRACE
try {
if (!stackTrace_.empty()) {
#ifdef CYBOZU_STACKTRACE_ONELINE
str_ += "\n<<<STACKTRACE>>> ";
str_ += stackTrace_;
#else
str_ += "\n<<<STACKTRACE\n";
str_ += stackTrace_;
str_ += "\n>>>STACKTRACE";
#endif
}
} catch (...) {
}
stackTrace_.clear();
#endif
return str_;
}
Exception& operator<<(const char *s)
{
str_ += ':';
str_ += s;
return *this;
}
Exception& operator<<(const std::string& s)
{
return operator<<(s.c_str());
}
#ifdef _WIN32
Exception& operator<<(const std::wstring& s)
{
return operator<<(cybozu::exception::wstr2str(s));
}
#endif
template<class T>
Exception& operator<<(const T& x)
{
std::ostringstream os;
os << x;
return operator<<(os.str());
}
};
class ErrorNo {
public:
#ifdef _WIN32
typedef unsigned int NativeErrorNo;
#else
typedef int NativeErrorNo;
#endif
explicit ErrorNo(NativeErrorNo err)
: err_(err)
{
}
ErrorNo()
: err_(getLatestNativeErrorNo())
{
}
NativeErrorNo getLatestNativeErrorNo() const
{
#ifdef _WIN32
return ::GetLastError();
#else
return errno;
#endif
}
/**
convert NativeErrNo to string(maybe UTF8)
@param err [in] errno
@note Linux : same as ConvertErrorNoToString
Windows : for Win32 API(use en-us)
*/
std::string toString() const
{
#ifdef _WIN32
const int msgSize = 256;
wchar_t msg[msgSize];
int size = FormatMessageW(
FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
0,
err_,
MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US),
msg,
msgSize,
NULL
);
if (size <= 0) return "";
// remove last "\r\n"
if (size > 2 && msg[size - 2] == '\r') {
msg[size - 2] = 0;
size -= 2;
}
std::string ret;
ret.resize(size);
// assume ascii only
for (int i = 0; i < size; i++) {
ret[i] = (char)msg[i];
}
char buf2[64];
CYBOZU_SNPRINTF(buf2, sizeof(buf2), "(%u)", err_);
ret += buf2;
return ret;
#else
return ConvertErrorNoToString(err_);
#endif
}
private:
NativeErrorNo err_;
};
inline std::ostream& operator<<(std::ostream& os, const cybozu::ErrorNo& self)
{
return os << self.toString();
}
} // cybozu
#endif
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