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SqMod/modules/mysql/Convert.cpp
Sandu Liviu Catalin 7dc20fcc0c Improve type conversion in the MySQL module. 
Implement field wrappers and field retrieval by name.
Various other fixes and adjustments.
2016-07-19 21:42:41 +03:00

475 lines
19 KiB
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// ------------------------------------------------------------------------------------------------
#include "Convert.hpp"
// ------------------------------------------------------------------------------------------------
#include <cerrno>
#include <cstdio>
#include <cstdlib>
#include <cstring>
// ------------------------------------------------------------------------------------------------
namespace SqMod {
// ------------------------------------------------------------------------------------------------
CSStr SqMySQLTypename(enum_field_types type)
{
switch(type)
{
case MYSQL_TYPE_DECIMAL: return _SC("decimal");
case MYSQL_TYPE_TINY: return _SC("tiny");
case MYSQL_TYPE_SHORT: return _SC("short");
case MYSQL_TYPE_LONG: return _SC("long");
case MYSQL_TYPE_FLOAT: return _SC("float");
case MYSQL_TYPE_DOUBLE: return _SC("double");
case MYSQL_TYPE_NULL: return _SC("null");
case MYSQL_TYPE_TIMESTAMP: return _SC("time-stamp");
case MYSQL_TYPE_LONGLONG: return _SC("long-long");
case MYSQL_TYPE_INT24: return _SC("int24");
case MYSQL_TYPE_DATE: return _SC("date");
case MYSQL_TYPE_TIME: return _SC("time");
case MYSQL_TYPE_DATETIME: return _SC("date-time");
case MYSQL_TYPE_YEAR: return _SC("year");
case MYSQL_TYPE_NEWDATE: return _SC("new-date");
case MYSQL_TYPE_VARCHAR: return _SC("var-char");
case MYSQL_TYPE_BIT: return _SC("bit");
#ifdef MYSQL_TYPE_TIMESTAMP2
case MYSQL_TYPE_TIMESTAMP2: return _SC("time-stamp2");
#endif // MYSQL_TYPE_TIMESTAMP2
#ifdef MYSQL_TYPE_DATETIME2
case MYSQL_TYPE_DATETIME2: return _SC("date-time2");
#endif // MYSQL_TYPE_DATETIME2
#ifdef MYSQL_TYPE_TIME2
case MYSQL_TYPE_TIME2: return _SC("time2");
#endif // MYSQL_TYPE_TIME2
case MYSQL_TYPE_NEWDECIMAL: return _SC("new-decimal");
case MYSQL_TYPE_ENUM: return _SC("enum");
case MYSQL_TYPE_SET: return _SC("set");
case MYSQL_TYPE_TINY_BLOB: return _SC("tiny-blob");
case MYSQL_TYPE_MEDIUM_BLOB: return _SC("medium-blob");
case MYSQL_TYPE_LONG_BLOB: return _SC("long-blob");
case MYSQL_TYPE_BLOB: return _SC("blob");
case MYSQL_TYPE_VAR_STRING: return _SC("var-string");
case MYSQL_TYPE_STRING: return _SC("string");
case MYSQL_TYPE_GEOMETRY: return _SC("geometry");
default: return _SC("unknown");
}
}
// ------------------------------------------------------------------------------------------------
CSStr SqMySQLTypenameC(enum_field_types type)
{
switch(type)
{
case MYSQL_TYPE_DECIMAL: return _SC("Decimal");
case MYSQL_TYPE_TINY: return _SC("Tiny");
case MYSQL_TYPE_SHORT: return _SC("Short");
case MYSQL_TYPE_LONG: return _SC("Long");
case MYSQL_TYPE_FLOAT: return _SC("Float");
case MYSQL_TYPE_DOUBLE: return _SC("Double");
case MYSQL_TYPE_NULL: return _SC("Null");
case MYSQL_TYPE_TIMESTAMP: return _SC("Time-Stamp");
case MYSQL_TYPE_LONGLONG: return _SC("Long-Long");
case MYSQL_TYPE_INT24: return _SC("Int24");
case MYSQL_TYPE_DATE: return _SC("Date");
case MYSQL_TYPE_TIME: return _SC("Time");
case MYSQL_TYPE_DATETIME: return _SC("Date-Time");
case MYSQL_TYPE_YEAR: return _SC("Year");
case MYSQL_TYPE_NEWDATE: return _SC("New-Date");
case MYSQL_TYPE_VARCHAR: return _SC("Var-Char");
case MYSQL_TYPE_BIT: return _SC("Bit");
#ifdef MYSQL_TYPE_TIMESTAMP2
case MYSQL_TYPE_TIMESTAMP2: return _SC("Time-Stamp2");
#endif // MYSQL_TYPE_TIMESTAMP2
#ifdef MYSQL_TYPE_DATETIME2
case MYSQL_TYPE_DATETIME2: return _SC("Date-Time2");
#endif // MYSQL_TYPE_DATETIME2
#ifdef MYSQL_TYPE_TIME2
case MYSQL_TYPE_TIME2: return _SC("Time2");
#endif // MYSQL_TYPE_TIME2
case MYSQL_TYPE_NEWDECIMAL: return _SC("New-Decimal");
case MYSQL_TYPE_ENUM: return _SC("Enum");
case MYSQL_TYPE_SET: return _SC("Set");
case MYSQL_TYPE_TINY_BLOB: return _SC("Tiny-Blob");
case MYSQL_TYPE_MEDIUM_BLOB: return _SC("Medium-Blob");
case MYSQL_TYPE_LONG_BLOB: return _SC("Long-Blob");
case MYSQL_TYPE_BLOB: return _SC("Blob");
case MYSQL_TYPE_VAR_STRING: return _SC("Var-String");
case MYSQL_TYPE_STRING: return _SC("String");
case MYSQL_TYPE_GEOMETRY: return _SC("Geometry");
default: return _SC("Unknown");
}
}
// ------------------------------------------------------------------------------------------------
static inline Int64 MySQLDateStrToSeconds(CSStr value)
{
Uint32 y = 1000, m = 1, d = 1;
// Attempt to extract the numeric values from the string
std::sscanf(value, "%u - %u - %u", &y, &m, &d);
// Calculate the number of seconds and return it
return SqMod_DateRangeToSeconds(1000, 1, 1, y, m, d);
}
// ------------------------------------------------------------------------------------------------
static inline Int64 MySQLTimeStrToSeconds(CSStr value)
{
Int32 h = 0, m = 0, s = 0;
// Attempt to extract the numeric values from the string
std::sscanf(value, "%d : %d : %d", &h, &m, &s);
// Convert the hours to seconds
h *= (60 * 60);
// Add the remaining minutes and seconds and return the result
return (h < 0) ? (h - ((m * 60) + s)) : (h + ((m * 60) + s));
}
// ------------------------------------------------------------------------------------------------
static inline Int64 MySQLDatetimeStrToSeconds(CSStr value)
{
Uint32 y = 1000, mo = 1, d = 1, h = 0, mi = 0, s = 0;
// Attempt to extract the numeric values from the string
std::sscanf(value, "%u - %u - %u %u : %u : %u", &y, &mo, &d, &h, &mi, &s);
// Calculate the number of seconds and return it
return SqMod_DateRangeToSeconds(1000, 1, 1, y, mo, d) + (h * (60 * 60)) + ((mi * 60) + s);
}
// ------------------------------------------------------------------------------------------------
static inline Int64 MySQLTimestampStrToSeconds(CSStr value)
{
Uint32 y = 1000, mo = 1, d = 1, h = 0, mi = 0, s = 0;
// Attempt to extract the numeric values from the string
std::sscanf(value, "%u - %u - %u %u : %u : %u", &y, &mo, &d, &h, &mi, &s);
// Detect if this was time-stamp 0
if (!y && !mo && !d && !h && !mi && !s)
{
return 0;
}
// Calculate the number of seconds and return it
return SqMod_DateRangeToSeconds(1970, 1, 1, y, mo, d) + (h * (60 * 60)) + ((mi * 60) + s);
}
// ------------------------------------------------------------------------------------------------
template < typename T > static inline T MemToNum(const Uint8 * b, Ulong l)
{
union
{
Uint8 a[8];
T n;
};
n = 0ULL;
switch (l)
{
default:
case 8:
{
a[7] = b[0];
a[6] = b[1];
a[5] = b[2];
a[4] = b[3];
a[3] = b[4];
a[2] = b[5];
a[1] = b[6];
a[0] = b[7];
} break;
case 7:
{
a[6] = b[0];
a[5] = b[1];
a[4] = b[2];
a[3] = b[3];
a[2] = b[4];
a[1] = b[5];
a[0] = b[6];
} break;
case 6:
{
a[5] = b[0];
a[4] = b[1];
a[3] = b[2];
a[2] = b[3];
a[1] = b[4];
a[0] = b[5];
} break;
case 5:
{
a[4] = b[0];
a[3] = b[1];
a[2] = b[2];
a[1] = b[3];
a[0] = b[4];
} break;
case 4:
{
a[3] = b[0];
a[2] = b[1];
a[1] = b[2];
a[0] = b[3];
} break;
case 3:
{
a[2] = b[0];
a[1] = b[1];
a[0] = b[2];
} break;
case 2:
{
a[1] = b[0];
a[0] = b[1];
} break;
case 1:
{
a[0] = b[0];
} break;
case 0: break;
}
return n;
}
// ------------------------------------------------------------------------------------------------
template < typename T >
static inline T ConvertToSInt(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
// Is there even a value to attempt to extract?
if (!value || *value == '\0')
{
return 0;
}
// Identify the type of value that must be converted and try to at least approximate something
switch(type)
{
case MYSQL_TYPE_NULL:
case MYSQL_TYPE_GEOMETRY: return static_cast< T >(0);
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_YEAR:
case MYSQL_TYPE_TINY:
case MYSQL_TYPE_SHORT:
case MYSQL_TYPE_INT24:
case MYSQL_TYPE_LONG: return ConvTo< T >::From(std::strtol(value, nullptr, 10));
case MYSQL_TYPE_LONGLONG:
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET: return ConvTo< T >::From(std::strtoll(value, nullptr, 10));
case MYSQL_TYPE_FLOAT: return ConvTo< T >::From(std::strtof(value, nullptr));
case MYSQL_TYPE_DOUBLE:
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL: return ConvTo< T >::From(std::strtod(value, nullptr));
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_NEWDATE: return ConvTo< T >::From(MySQLDateStrToSeconds(value));
case MYSQL_TYPE_TIME: return ConvTo< T >::From(MySQLTimeStrToSeconds(value));
case MYSQL_TYPE_TIMESTAMP: return ConvTo< T >::From(MySQLTimestampStrToSeconds(value));
case MYSQL_TYPE_DATETIME: return ConvTo< T >::From(MySQLDatetimeStrToSeconds(value));
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB: return MemToNum< T >(reinterpret_cast< const Uint8 * >(value), length);
default:
{
STHROWF("Unknown conversion from (%s) to (%s)", SqMySQLTypenameC(type), tn);
} break;
}
// Should not reach this point!
return 0;
}
// ------------------------------------------------------------------------------------------------
template < typename T >
static inline T ConvertToUInt(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
// Is there even a value to attempt to extract?
if (!value || *value == '\0')
{
return 0;
}
// Identify the type of value that must be converted and try to at least approximate something
switch(type)
{
case MYSQL_TYPE_NULL:
case MYSQL_TYPE_GEOMETRY: return static_cast< T >(0);
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_YEAR:
case MYSQL_TYPE_TINY:
case MYSQL_TYPE_SHORT:
case MYSQL_TYPE_INT24:
case MYSQL_TYPE_LONG: return ConvTo< T >::From(std::strtoul(value, nullptr, 10));
case MYSQL_TYPE_LONGLONG:
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET: return ConvTo< T >::From(std::strtoull(value, nullptr, 10));
case MYSQL_TYPE_FLOAT: return ConvTo< T >::From(std::strtof(value, nullptr));
case MYSQL_TYPE_DOUBLE:
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL: return ConvTo< T >::From(std::strtod(value, nullptr));
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_NEWDATE: return ConvTo< T >::From(MySQLDateStrToSeconds(value));
case MYSQL_TYPE_TIME: return ConvTo< T >::From(MySQLTimeStrToSeconds(value));
case MYSQL_TYPE_TIMESTAMP: return ConvTo< T >::From(MySQLTimestampStrToSeconds(value));
case MYSQL_TYPE_DATETIME: return ConvTo< T >::From(MySQLDatetimeStrToSeconds(value));
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB: return MemToNum< T >(reinterpret_cast< const Uint8 * >(value), length);
default:
{
STHROWF("Unknown conversion from (%s) to (%s)", SqMySQLTypenameC(type), tn);
} break;
}
// Should not reach this point!
return 0;
}
// ------------------------------------------------------------------------------------------------
Int8 DbConvTo< Int8 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToSInt< Int8 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Uint8 DbConvTo< Uint8 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToUInt< Uint8 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Int16 DbConvTo< Int16 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToSInt< Int16 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Uint16 DbConvTo< Uint16 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToUInt< Uint16 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Int32 DbConvTo< Int32 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToSInt< Int32 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Uint32 DbConvTo< Uint32 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToUInt< Uint32 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Int64 DbConvTo< Int64 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToSInt< Int64 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Uint64 DbConvTo< Uint64 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToUInt< Uint64 >(value, length, type, tn);
}
// ------------------------------------------------------------------------------------------------
Float32 DbConvTo< Float32 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
// Is there even a value to attempt to extract?
if (!value || *value == '\0')
{
return 0;
}
// Identify the type of value that must be converted and try to at least approximate something
switch(type)
{
case MYSQL_TYPE_NULL:
case MYSQL_TYPE_GEOMETRY: return static_cast< Float32 >(0);
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_YEAR:
case MYSQL_TYPE_TINY:
case MYSQL_TYPE_SHORT:
case MYSQL_TYPE_INT24:
case MYSQL_TYPE_LONG: return ConvTo< Float32 >::From(std::strtol(value, nullptr, 10));
case MYSQL_TYPE_LONGLONG: return ConvTo< Float32 >::From(std::strtoll(value, nullptr, 10));
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET:
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_FLOAT: return std::strtof(value, nullptr);
case MYSQL_TYPE_DOUBLE: return ConvTo< Float32 >::From(std::strtod(value, nullptr));
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL: return std::strtof(value, nullptr);
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_NEWDATE: return ConvTo< Float32 >::From(MySQLDateStrToSeconds(value));
case MYSQL_TYPE_TIME: return ConvTo< Float32 >::From(MySQLTimeStrToSeconds(value));
case MYSQL_TYPE_TIMESTAMP: return ConvTo< Float32 >::From(MySQLTimestampStrToSeconds(value));
case MYSQL_TYPE_DATETIME: return ConvTo< Float32 >::From(MySQLDatetimeStrToSeconds(value));
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB: return MemToNum< Float32 >(reinterpret_cast< const Uint8 * >(value), length);
default:
{
STHROWF("Unknown conversion from (%s) to (%s)", SqMySQLTypenameC(type), tn);
} break;
}
// Should not reach this point!
return 0;
}
// ------------------------------------------------------------------------------------------------
Float64 DbConvTo< Float64 >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
// Is there even a value to attempt to extract?
if (!value || *value == '\0')
{
return 0;
}
// Identify the type of value that must be converted and try to at least approximate something
switch(type)
{
case MYSQL_TYPE_NULL:
case MYSQL_TYPE_GEOMETRY: return static_cast< Float64 >(0);
case MYSQL_TYPE_BIT:
case MYSQL_TYPE_YEAR:
case MYSQL_TYPE_TINY:
case MYSQL_TYPE_SHORT:
case MYSQL_TYPE_INT24:
case MYSQL_TYPE_LONG: return ConvTo< Float64 >::From(std::strtol(value, nullptr, 10));
case MYSQL_TYPE_LONGLONG: return ConvTo< Float64 >::From(std::strtoll(value, nullptr, 10));
case MYSQL_TYPE_ENUM:
case MYSQL_TYPE_SET:
case MYSQL_TYPE_VARCHAR:
case MYSQL_TYPE_VAR_STRING:
case MYSQL_TYPE_STRING:
case MYSQL_TYPE_FLOAT:
case MYSQL_TYPE_DOUBLE:
case MYSQL_TYPE_DECIMAL:
case MYSQL_TYPE_NEWDECIMAL: return std::strtod(value, nullptr);
case MYSQL_TYPE_DATE:
case MYSQL_TYPE_NEWDATE: return ConvTo< Float64 >::From(MySQLDateStrToSeconds(value));
case MYSQL_TYPE_TIME: return ConvTo< Float64 >::From(MySQLTimeStrToSeconds(value));
case MYSQL_TYPE_TIMESTAMP: return ConvTo< Float64 >::From(MySQLTimestampStrToSeconds(value));
case MYSQL_TYPE_DATETIME: return ConvTo< Float64 >::From(MySQLDatetimeStrToSeconds(value));
case MYSQL_TYPE_TINY_BLOB:
case MYSQL_TYPE_MEDIUM_BLOB:
case MYSQL_TYPE_LONG_BLOB:
case MYSQL_TYPE_BLOB: return MemToNum< Float64 >(reinterpret_cast< const Uint8 * >(value), length);
default:
{
STHROWF("Unknown conversion from (%s) to (%s)", SqMySQLTypenameC(type), tn);
} break;
}
// Should not reach this point!
return 0;
}
// ------------------------------------------------------------------------------------------------
bool DbConvTo< bool >::From(CSStr value, Ulong length, enum_field_types type, CSStr tn)
{
return ConvertToSInt< Int64 >(value, length, type, tn) > 0;
}
} // Namespace:: SqMod
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