qswiki/database/hdr/sqlite_modern_cpp/errors.h

101 regels
3.7 KiB
C++

#pragma once
#include <string>
#include <stdexcept>
#include <sqlite3.h>
namespace sqlite
{
class sqlite_exception : public std::runtime_error
{
public:
sqlite_exception(const char *msg, std::string sql, int code = -1) : runtime_error(msg), code(code), sql(sql)
{
}
sqlite_exception(int code, std::string sql) : runtime_error(sqlite3_errstr(code)), code(code), sql(sql)
{
}
int get_code() const
{
return code & 0xFF;
}
int get_extended_code() const
{
return code;
}
std::string get_sql() const
{
return sql;
}
private:
int code;
std::string sql;
};
namespace errors
{
// One more or less trivial derived error class for each SQLITE error.
// Note the following are not errors so have no classes:
// SQLITE_OK, SQLITE_NOTICE, SQLITE_WARNING, SQLITE_ROW, SQLITE_DONE
//
// Note these names are exact matches to the names of the SQLITE error codes.
#define SQLITE_MODERN_CPP_ERROR_CODE(NAME, name, derived) \
class name : public sqlite_exception \
{ \
using sqlite_exception::sqlite_exception; \
}; \
derived
#define SQLITE_MODERN_CPP_ERROR_CODE_EXTENDED(BASE, SUB, base, sub) \
class base##_##sub : public base \
{ \
using base::base; \
};
#include "lists/error_codes.h"
#undef SQLITE_MODERN_CPP_ERROR_CODE_EXTENDED
#undef SQLITE_MODERN_CPP_ERROR_CODE
// Some additional errors are here for the C++ interface
class more_rows : public sqlite_exception
{
using sqlite_exception::sqlite_exception;
};
class no_rows : public sqlite_exception
{
using sqlite_exception::sqlite_exception;
};
class more_statements : public sqlite_exception
{
using sqlite_exception::sqlite_exception;
}; // Prepared statements can only contain one statement
class invalid_utf16 : public sqlite_exception
{
using sqlite_exception::sqlite_exception;
};
static void throw_sqlite_error(const int &error_code, const std::string &sql = "")
{
switch(error_code & 0xFF)
{
#define SQLITE_MODERN_CPP_ERROR_CODE(NAME, name, derived) \
case SQLITE_##NAME: \
switch(error_code) \
{ \
derived default : throw name(error_code, sql); \
}
#define SQLITE_MODERN_CPP_ERROR_CODE_EXTENDED(BASE, SUB, base, sub) \
case SQLITE_##BASE##_##SUB: \
throw base##_##sub(error_code, sql);
#include "lists/error_codes.h"
#undef SQLITE_MODERN_CPP_ERROR_CODE_EXTENDED
#undef SQLITE_MODERN_CPP_ERROR_CODE
default:
throw sqlite_exception(error_code, sql);
}
}
} // namespace errors
namespace exceptions = errors;
} // namespace sqlite