public static DbValue NULLIF(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "NULLIF";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
ImmediateValue argval = null;
argval = tools.AllocValue(arg0type.ID);
argval.SetValue(arg0);
DbFunctionArguments compareargs = new DbFunctionArguments(new DbValue[2]);
compareargs[0] = argval;
compareargs[1] = args[1];
DbValue result = COMPARE(tools, compareargs);
int iresult = tools.GetInt(result);
if (iresult == 0)
{
List<byte> buf = tools.AllocBuffer(arg0type.Size);
buf.Add(1);
for (int i = 0; i < arg0type.Size - 1; i++)
{
buf.Add(0);
}
return tools.AllocValue(ByteSlice.Prepare(buf), arg0type);
}
else
{
return args[0];
}
}
public static DbValue REVERSE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "REVERSE";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
mstring x = tools.GetString(arg0);
mstring r = mstring.Prepare();
for (int i = x.Length - 1; i >= 0; i--)
{
r = r.AppendM(x.SubstringM(i, 1));
}
return(tools.AllocValue(r));
}
public static DbValue ADD_MONTHS(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ADD_MONTHS";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 0, "input INT, got " + arg1type.Name.ToUpper());
}
DateTime dt = tools.GetDateTime(arg0);
int months = tools.GetInt(arg1);
dt = dt.AddMonths(months);
return(tools.AllocValue(dt));
}
public static DbValue ADD_MONTHS(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ADD_MONTHS";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 0, "input INT, got " + arg1type.Name.ToUpper());
}
DateTime dt = tools.GetDateTime(arg0);
int months = tools.GetInt(arg1);
dt = dt.AddMonths(months);
return tools.AllocValue(dt);
}
public static DbValue REVERSE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "REVERSE";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
mstring x = tools.GetString(arg0);
mstring r = mstring.Prepare();
for (int i = x.Length-1; i >= 0; i--)
{
r = r.AppendM(x.SubstringM(i, 1));
}
return tools.AllocValue(r);
}
public static DbValue NVL2(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "NVL2";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (arg0type.ID != arg1type.ID)
{
args.Expected(FunctionName, 0, "input " + arg0type.Name.ToString() + ", got " + arg1type.Name.ToUpper());
}
if (arg0type.ID != arg2type.ID)
{
args.Expected(FunctionName, 0, "input " + arg0type.Name.ToString() + ", got " + arg2type.Name.ToUpper());
}
if (Types.IsNullValue(arg0))
{
return(args[2]);
}
else
{
return(args[1]);
}
}
public static DbValue ROUND(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ROUND";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DOUBLE)
{
args.Expected(FunctionName, 0, "input DOUBLE, got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "digits INT, got " + arg1type.Name.ToUpper());
}
int digits = tools.GetInt(arg1);
double x = tools.GetDouble(arg0);
x = Math.Round(x, digits);
return tools.AllocValue(x);
}
public static DbValue SPACE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "SPACE";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 0, "input INT, got " + arg0type.Name.ToUpper());
return null;
}
int len = tools.GetInt(arg0);
if (len < 1)
{
return tools.AllocValue(mstring.Prepare(""));
}
else
{
mstring s = mstring.Prepare();
for (int i = 0; i < len; i++)
{
s = s.AppendM(" ");
}
return tools.AllocValue(s);
}
}
public static DbValue ROUND(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ROUND";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DOUBLE)
{
args.Expected(FunctionName, 0, "input DOUBLE, got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "digits INT, got " + arg1type.Name.ToUpper());
}
int digits = tools.GetInt(arg1);
double x = tools.GetDouble(arg0);
x = Math.Round(x, digits);
return(tools.AllocValue(x));
}
public static DbValue NVL2(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "NVL2";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (arg0type.ID != arg1type.ID)
{
args.Expected(FunctionName, 0, "input " + arg0type.Name.ToString() + ", got " + arg1type.Name.ToUpper());
}
if (arg0type.ID != arg2type.ID)
{
args.Expected(FunctionName, 0, "input " + arg0type.Name.ToString() + ", got " + arg2type.Name.ToUpper());
}
if (Types.IsNullValue(arg0))
{
return args[2];
}
else
{
return args[1];
}
}
public static DbValue NULLIF(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "NULLIF";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
ImmediateValue argval = null;
argval = tools.AllocValue(arg0type.ID);
argval.SetValue(arg0);
DbFunctionArguments compareargs = new DbFunctionArguments(new DbValue[2]);
compareargs[0] = argval;
compareargs[1] = args[1];
DbValue result = COMPARE(tools, compareargs);
int iresult = tools.GetInt(result);
if (iresult == 0)
{
List <byte> buf = tools.AllocBuffer(arg0type.Size);
buf.Add(1);
for (int i = 0; i < arg0type.Size - 1; i++)
{
buf.Add(0);
}
return(tools.AllocValue(ByteSlice.Prepare(buf), arg0type));
}
else
{
return(args[0]);
}
}
public static DbValue CONCAT(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "CONCAT";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg1type.Name.ToUpper());
}
mstring s0 = tools.GetString(arg0);
mstring s1 = tools.GetString(arg1);
s0 = s0.AppendM(s1);
return(tools.AllocValue(s0));
}
public static DbValue SUBSTRING(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "SUBSTRING";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
return null;
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "count INT, got " + arg1type.Name.ToUpper());
return null;
}
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (arg2type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "count INT, got " + arg2type.Name.ToUpper());
return null;
}
mstring x = tools.GetString(arg0);
int startIndex = tools.GetInt(arg1);
if (startIndex < 0)
{
startIndex = 0;
}
int len = tools.GetInt(arg2);
if (len < 0)
{
throw new ArgumentException(FunctionName + " length cannot be negative");
}
if (startIndex + len > x.Length)
{
return tools.AllocValue(mstring.Prepare());
}
else
{
mstring sub = x.SubstringM(startIndex, len);
return tools.AllocValue(sub);
}
}
public static DbValue ISNULL(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ISNULL";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
bool bresult = Types.IsNullValue(arg0);
return tools.AllocValue(bresult ? 1 : 0);
}
public static DbValue ISNULL(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ISNULL";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
bool bresult = Types.IsNullValue(arg0);
return(tools.AllocValue(bresult ? 1 : 0));
}
public static DbValue MONTHS_BETWEEN(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "MONTHS_BETWEEN";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg1type.Name.ToUpper());
}
DateTime dt0 = tools.GetDateTime(arg0);
DateTime dt1 = tools.GetDateTime(arg1);
int daysInMonth0 = DateTime.DaysInMonth(dt0.Year, dt0.Month);
int daysInMonth1 = DateTime.DaysInMonth(dt1.Year, dt1.Month);
double btw = 0;
if (dt0.Year == dt1.Year && dt0.Month == dt1.Month) //same month and same year
{
btw = (double)(dt0.Day - dt1.Day) / (double)daysInMonth0;
}
else if (dt0.Day == daysInMonth0 && dt1.Day == daysInMonth1) //both fall on the last day of their months
{
btw = 12 * (dt0.Year - dt1.Year) + dt0.Month - dt1.Month;
}
else
{
TimeSpan sp = dt0 - dt1;
btw = sp.TotalDays / 31d;
}
return(tools.AllocValue(btw));
}
public static DbValue MONTHS_BETWEEN(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "MONTHS_BETWEEN";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg1type.Name.ToUpper());
}
DateTime dt0 = tools.GetDateTime(arg0);
DateTime dt1 = tools.GetDateTime(arg1);
int daysInMonth0 = DateTime.DaysInMonth(dt0.Year, dt0.Month);
int daysInMonth1 = DateTime.DaysInMonth(dt1.Year, dt1.Month);
double btw = 0;
if (dt0.Year == dt1.Year && dt0.Month == dt1.Month) //same month and same year
{
btw = (double)(dt0.Day - dt1.Day) / (double)daysInMonth0;
}
else if (dt0.Day == daysInMonth0 && dt1.Day == daysInMonth1) //both fall on the last day of their months
{
btw = 12 * (dt0.Year - dt1.Year) + dt0.Month - dt1.Month;
}
else
{
TimeSpan sp = dt0 - dt1;
btw = sp.TotalDays / 31d;
}
return tools.AllocValue(btw);
}
public static DbValue REPLACE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "REPLACE";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg1type.Name.ToUpper());
}
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg2))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg2type.Name.ToUpper());
}
mstring sentence = tools.GetString(arg0);
mstring word = tools.GetString(arg1);
mstring replacement = tools.GetString(arg2);
sentence = sentence.ReplaceM(ref word, ref replacement);
return(tools.AllocValue(sentence));
}
public static DbValue DEGREES(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DEGREES";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
double d = 0;
switch (arg0type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg0);
d = (double)x;
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg0);
d = (double)x;
}
break;
case DbTypeID.DOUBLE:
{
d = tools.GetDouble(arg0);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
double r = (d * 180d) / Math.PI;
return(tools.AllocValue(r));
}
public static DbValue ABS(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ABS";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
switch (arg0type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg0);
x = Math.Abs(x);
return tools.AllocValue(x);
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg0);
x = Math.Abs(x);
return tools.AllocValue(x);
}
break;
case DbTypeID.DOUBLE:
{
double x = tools.GetDouble(arg0);
x = Math.Abs(x);
return tools.AllocValue(x);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return null; // Doesn't reach here.
}
}
public static DbValue LEFT(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LEFT";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "count INT, got " + arg1type.Name.ToUpper());
}
mstring x = tools.GetString(arg0);
int LeftCount = tools.GetInt(arg1);
if (LeftCount >= x.Length)
{
// User requested the whole string.
return(tools.AllocValue(arg0, arg0type));
}
else if (LeftCount < 0)
{
throw new ArgumentException(FunctionName + " count cannot be negative");
}
else
{
x = x.SubstringM(0, LeftCount);
return(tools.AllocValue(x));
}
}
public static DbValue REPLACE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "REPLACE";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg1type.Name.ToUpper());
}
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg2))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg2type.Name.ToUpper());
}
mstring sentence = tools.GetString(arg0);
mstring word = tools.GetString(arg1);
mstring replacement = tools.GetString(arg2);
sentence = sentence.ReplaceM(ref word, ref replacement);
return tools.AllocValue(sentence);
}
public static DbValue PATINDEX(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "PATINDEX";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg1type.Name.ToUpper());
}
string pat = tools.GetString(arg0).ToString();
string str = tools.GetString(arg1).ToString();
pat = pat.Trim('%');
string rpat = GetRegexString(pat);
System.Text.RegularExpressions.Regex regx = new System.Text.RegularExpressions.Regex(rpat);
System.Text.RegularExpressions.Match match = regx.Match(str);
int indx = -1;
if (match != null)
{
indx = match.Index;
}
return(tools.AllocValue(indx));
}
public static DbValue ISLIKE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ISLIKE";
args.EnsureCount(FunctionName, 2);
int ismatch = 0;
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocValue(ismatch));
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 1, "pattern CHAR(n), got " + arg1type.Name.ToUpper());
}
string x = tools.GetString(arg0).ToString();
string y = tools.GetString(arg1).ToString();
string pattern = GetRegexString(y);
if (pattern != null)
{
System.Text.RegularExpressions.Regex regx = new System.Text.RegularExpressions.Regex(pattern, System.Text.RegularExpressions.RegexOptions.IgnoreCase);
if (regx.IsMatch(x))
{
ismatch = 1;
}
}
return(tools.AllocValue(ismatch));
}
public static DbValue LEFT(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LEFT";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "count INT, got " + arg1type.Name.ToUpper());
}
mstring x = tools.GetString(arg0);
int LeftCount = tools.GetInt(arg1);
if (LeftCount >= x.Length)
{
// User requested the whole string.
return tools.AllocValue(arg0, arg0type);
}
else if (LeftCount < 0)
{
throw new ArgumentException(FunctionName + " count cannot be negative");
}
else
{
x = x.SubstringM(0, LeftCount);
return tools.AllocValue(x);
}
}
public static DbValue FLOOR(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "FLOOR";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DOUBLE)
{
args.Expected(FunctionName, 0, "input DOUBLE, got " + arg0type.Name.ToUpper());
}
double x = tools.GetDouble(arg0);
x = Math.Floor(x);
return tools.AllocValue(x);
}
public static DbValue LOWER(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LOWER";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
mstring x = tools.GetString(arg0);
mstring lower = x.ToLowerM();
return tools.AllocValue(lower);
}
public static DbValue LTRIM(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LTRIM";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
string x = tools.GetString(arg0).ToString();
string y = x.TrimStart();
return tools.AllocValue(mstring.Prepare(y));
}
public static DbValue ISLIKE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ISLIKE";
args.EnsureCount(FunctionName, 2);
int ismatch = 0;
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocValue(ismatch);
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 1, "pattern CHAR(n), got " + arg1type.Name.ToUpper());
}
string x = tools.GetString(arg0).ToString();
string y = tools.GetString(arg1).ToString();
string pattern = GetRegexString(y);
if (pattern != null)
{
System.Text.RegularExpressions.Regex regx = new System.Text.RegularExpressions.Regex(pattern, System.Text.RegularExpressions.RegexOptions.IgnoreCase);
if(regx.IsMatch(x))
{
ismatch = 1;
}
}
return tools.AllocValue(ismatch);
}
public static DbValue FORMAT(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "FORMAT";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg1type.Name.ToUpper());
}
string formatstr = tools.GetString(arg0).ToString();
DateTime dt = tools.GetDateTime(arg1);
mstring result = mstring.Prepare(dt.ToString(formatstr));
while (result.Length < 80)
{
result.MAppend('\0');
}
return(tools.AllocValue(result));
}
public static DbValue PATINDEX(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "PATINDEX";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (arg1type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg1type.Name.ToUpper());
}
string pat = tools.GetString(arg0).ToString();
string str = tools.GetString(arg1).ToString();
pat = pat.Trim('%');
string rpat = GetRegexString(pat);
System.Text.RegularExpressions.Regex regx = new System.Text.RegularExpressions.Regex(rpat);
System.Text.RegularExpressions.Match match = regx.Match(str);
int indx = -1;
if (match != null)
{
indx = match.Index;
}
return tools.AllocValue(indx);
}
public static DbValue LAST_DAY(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LAST_DAY";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg0type.Name.ToUpper());
}
DateTime dt = tools.GetDateTime(arg0);
dt = dt.AddMonths(1);
dt = dt.AddDays(-1);
return tools.AllocValue(dt);
}
public static DbValue CEILING(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "CEILING";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DOUBLE)
{
args.Expected(FunctionName, 0, "input DOUBLE, got " + arg0type.Name.ToUpper());
}
double x = tools.GetDouble(arg0);
x = Math.Ceiling(x);
return(tools.AllocValue(x));
}
public static DbValue LEN(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LEN";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
mstring x = tools.GetString(arg0);
int len = x.Length;
return(tools.AllocValue(len));
}
public static DbValue NEXT_DAY(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "NEXT_DAY";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg0type.Name.ToUpper());
}
DateTime dt = tools.GetDateTime(arg0);
dt = dt.AddDays(1);
return(tools.AllocValue(dt));
}
public static DbValue LTRIM(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "LTRIM";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
string x = tools.GetString(arg0).ToString();
string y = x.TrimStart();
return(tools.AllocValue(mstring.Prepare(y)));
}
public static DbValue FORMAT(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "FORMAT";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg1type.Name.ToUpper());
}
string formatstr = tools.GetString(arg0).ToString();
DateTime dt = tools.GetDateTime(arg1);
mstring result = mstring.Prepare(dt.ToString(formatstr));
while (result.Length < 80)
{
result.MAppend('\0');
}
return tools.AllocValue(result);
}
public static DbValue SPACE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "SPACE";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 0, "input INT, got " + arg0type.Name.ToUpper());
return(null);
}
int len = tools.GetInt(arg0);
if (len < 1)
{
return(tools.AllocValue(mstring.Prepare("")));
}
else
{
mstring s = mstring.Prepare();
for (int i = 0; i < len; i++)
{
s = s.AppendM(" ");
}
return(tools.AllocValue(s));
}
}
public static DbValue DATEPART_YEAR(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DATEPART_YEAR";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DateTime, got " + arg0type.Name.ToUpper());
return null; // Doesn't reach here.
}
DateTime dt = tools.GetDateTime(arg0);
return tools.AllocValue(dt.Year);
}
public static DbValue DATEPART_HOUR(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DATEPART_HOUR";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DateTime, got " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
DateTime dt = tools.GetDateTime(arg0);
return(tools.AllocValue(dt.Hour));
}
public static DbValue MOD(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "MOD";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
int i0, i1 = 0;
long l0, l1 = 0;
double d0, d1 = 0;
switch (arg1type.ID)
{
case DbTypeID.INT:
i1 = tools.GetInt(arg1);
break;
case DbTypeID.LONG:
l1 = tools.GetLong(arg1);
break;
case DbTypeID.DOUBLE:
d1 = tools.GetDouble(arg1);
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg1type.Name.ToUpper());
return null; // Doesn't reach here.
}
if (i1 == 0 && l1 == 0 && d1 == 0)
{
args.Expected(FunctionName, 0, "Division by zero");
return null;
}
switch (arg0type.ID)
{
case DbTypeID.INT:
{
i0 = tools.GetInt(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int rem = i0 % i1;
return tools.AllocValue(rem);
}
break;
case DbTypeID.LONG:
{
long rem = (long)i0 % l1;
return tools.AllocValue(rem);
}
break;
case DbTypeID.DOUBLE:
{
double rem = (double)i0 % d1;
return tools.AllocValue(rem);
}
break;
}
}
break;
case DbTypeID.LONG:
{
l0 = tools.GetLong(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
long rem = l0 % (long)i1;
return tools.AllocValue(rem);
}
break;
case DbTypeID.LONG:
{
long rem = l0 % l1;
return tools.AllocValue(rem);
}
break;
case DbTypeID.DOUBLE:
{
double rem = (double)l0 % d1;
return tools.AllocValue(rem);
}
break;
}
}
break;
case DbTypeID.DOUBLE:
{
d0 = tools.GetDouble(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
double rem = d0 % (double)i1;
return tools.AllocValue(rem);
}
break;
case DbTypeID.LONG:
{
double rem = d0 % (double)l1;
return tools.AllocValue(rem);
}
break;
case DbTypeID.DOUBLE:
{
double rem = d0 % d1;
return tools.AllocValue(rem);
}
break;
}
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return null; // Doesn't reach here.
}
return null; // Doesn't reach here.
}
public static DbValue CAST(DbFunctionTools tools, DbFunctionArguments args)
{
#if DEBUG
//System.Diagnostics.Debugger.Launch();
#endif
string FunctionName = "CAST";
args.EnsureCount(FunctionName, 2);
DbType type;
ByteSlice bs = args[0].Eval(out type);
mstring xas = tools.GetString(args[1]);
if (!xas.StartsWith("AS "))
{
#if DEBUG
throw new Exception("Expected AS <type> in CAST, not: " + xas);
#endif
throw new Exception("Expected AS <type> in CAST");
}
mstring msastype = xas.SubstringM(3);
string sastype = msastype.ToString(); // Alloc.
sastype = DbType.NormalizeName(sastype); // Alloc if char(n).
DbType astype = DbType.Prepare(sastype); // Alloc if char(n).
if (DbTypeID.NULL == astype.ID)
{
throw new Exception("Unknown AS type in CAST: " + sastype);
}
switch (astype.ID)
{
case DbTypeID.INT:
switch (type.ID)
{
case DbTypeID.INT: // as INT
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return(tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype));
case DbTypeID.LONG: // as INT
return(tools.AllocValue((int)tools.GetLong(bs)));
case DbTypeID.DOUBLE: // as INT
return(tools.AllocValue((int)tools.GetDouble(bs)));
case DbTypeID.DATETIME: // as INT
return(tools.AllocValue((int)tools.GetDateTime(bs).Ticks));
case DbTypeID.CHARS: // as INT
{
int to = tools.GetString(bs).NextItemToInt32(' ');
return(tools.AllocValue(to));
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.LONG:
switch (type.ID)
{
case DbTypeID.INT: // as LONG
return(tools.AllocValue((long)tools.GetInt(bs)));
case DbTypeID.LONG: // as LONG
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return(tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype));
case DbTypeID.DOUBLE: // as LONG
return(tools.AllocValue((long)tools.GetDouble(bs)));
case DbTypeID.DATETIME: // as LONG
return(tools.AllocValue((long)tools.GetDateTime(bs).Ticks));
case DbTypeID.CHARS: // as LONG
{
long to = tools.GetString(bs).NextItemToInt64(' ');
return(tools.AllocValue(to));
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.DOUBLE:
switch (type.ID)
{
case DbTypeID.INT: // as DOUBLE
return(tools.AllocValue((double)tools.GetInt(bs)));
case DbTypeID.LONG: // as DOUBLE
return(tools.AllocValue((double)tools.GetLong(bs)));
case DbTypeID.DOUBLE: // as DOUBLE
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return(tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype));
case DbTypeID.DATETIME: // as DOUBLE
return(tools.AllocValue((double)tools.GetDateTime(bs).Ticks));
case DbTypeID.CHARS: // as DOUBLE
{
double to = tools.GetString(bs).NextItemToDouble(' ');
return(tools.AllocValue(to));
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.DATETIME:
switch (type.ID)
{
case DbTypeID.INT: // as DATETIME
return(tools.AllocValue(new DateTime((long)tools.GetInt(bs))));
case DbTypeID.LONG: // as DATETIME
return(tools.AllocValue(new DateTime((long)tools.GetLong(bs))));
case DbTypeID.DOUBLE: // as DATETIME
return(tools.AllocValue(new DateTime((long)tools.GetDouble(bs))));
case DbTypeID.DATETIME: // as DATETIME
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return(tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype));
case DbTypeID.CHARS: // as DATETIME
{
mstring to = tools.GetString(bs);
return(tools.AllocValue(DateTime.Parse(to.ToString())));
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.CHARS:
switch (type.ID)
{
case DbTypeID.INT: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetInt(bs));
return(tools.AllocValue(ms, astype.Size));
}
case DbTypeID.LONG: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetLong(bs));
return(tools.AllocValue(ms, astype.Size));
}
case DbTypeID.DOUBLE: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetDouble(bs));
return(tools.AllocValue(ms, astype.Size));
}
case DbTypeID.DATETIME: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetDateTime(bs).ToString());
return(tools.AllocValue(ms, astype.Size));
}
case DbTypeID.CHARS: // as CHAR(n)
if (astype.Size > type.Size)
{
//throw new Exception("CAST: source value buffer too small");
return(tools.AllocValue(tools.GetString(bs), astype.Size));
}
return(tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype));
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
}
public static DbValue ATN2(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "ATN2";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0) || Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
double d1 = 0;
double d2 = 0;
switch (arg0type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg0);
d1 = (double)x;
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg0);
d1 = (double)x;
}
break;
case DbTypeID.DOUBLE:
{
d1 = tools.GetDouble(arg0);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return null; // Doesn't reach here.
}
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg1);
d2 = (double)x;
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg1);
d2 = (double)x;
}
break;
case DbTypeID.DOUBLE:
{
d2 = tools.GetDouble(arg1);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return null; // Doesn't reach here.
}
d1 = Math.Atan2(d1, d2);
return tools.AllocValue(d1);
}
public static DbValue COMPARE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "COMPARE";
args.EnsureCount(FunctionName, 2);
int result;
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0))
{
result = int.MaxValue;
return(tools.AllocValue(result));
}
if (Types.IsNullValue(arg1))
{
result = int.MinValue;
return(tools.AllocValue(result));
}
int i0 = 0, i1 = 0;
long l0 = 0, l1 = 0;
double d0 = 0, d1 = 0;
switch (arg0type.ID)
{
case DbTypeID.INT:
i0 = tools.GetInt(arg0);
break;
case DbTypeID.LONG:
l0 = tools.GetLong(arg0);
break;
case DbTypeID.DOUBLE:
d0 = tools.GetDouble(arg0);
break;
case DbTypeID.CHARS:
{
if (arg1type.ID != DbTypeID.CHARS && arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input CHAR(n) or DATETIME, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
if (arg1type.ID == DbTypeID.CHARS)
{
for (int i = 1; ; i += 2)
{
bool b1end = (i + 2 > arg0.Length) || (arg0[i] == 0 && arg0[i + 1] == 0);
bool b2end = (i + 2 > arg1.Length) || (arg1[i] == 0 && arg1[i + 1] == 0);
if (b1end)
{
if (b2end)
{
result = 0;
break;
}
result = -1;
break;
}
else if (b2end)
{
result = 1;
break;
}
int diff = Types.UTF16BytesToLowerChar(arg0[i], arg0[i + 1])
- Types.UTF16BytesToLowerChar(arg1[i], arg1[i + 1]);
if (0 != diff)
{
char ch0 = Types.UTF16BytesToChar(arg0[i], arg0[i + 1]);
char ch1 = Types.UTF16BytesToChar(arg1[i], arg1[i + 1]);
if (!Char.IsLetter(ch0) || !Char.IsLetter(ch1))
{
result = ch0 - ch1;
}
result = diff;
break;
}
}
}
else
{
string sdt = tools.GetString(arg0).ToString();
DateTime dt0 = DateTime.Parse(sdt);
DateTime dt1 = tools.GetDateTime(arg1);
result = dt0.CompareTo(dt1);
}
return(tools.AllocValue(result));
}
break;
case DbTypeID.DATETIME:
{
if (arg1type.ID != DbTypeID.CHARS && arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input CHAR(n) or DATETIME, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
if (arg1type.ID == DbTypeID.DATETIME)
{
DateTime dt0 = tools.GetDateTime(arg0);
DateTime dt1 = tools.GetDateTime(arg1);
result = dt0.CompareTo(dt1);
}
else
{
DateTime dt0 = tools.GetDateTime(arg0);
string sdt = tools.GetString(arg1).ToString();
DateTime dt1 = DateTime.Parse(sdt);
result = dt0.CompareTo(dt1);
}
return(tools.AllocValue(result));
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got1 " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
switch (arg1type.ID)
{
case DbTypeID.INT:
i1 = tools.GetInt(arg1);
break;
case DbTypeID.LONG:
l1 = tools.GetLong(arg1);
break;
case DbTypeID.DOUBLE:
d1 = tools.GetDouble(arg1);
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got2 " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
switch (arg0type.ID)
{
case DbTypeID.INT:
switch (arg1type.ID)
{
case DbTypeID.INT:
result = i0.CompareTo(i1);
break;
case DbTypeID.LONG:
result = ((long)i0).CompareTo(l1);
break;
case DbTypeID.DOUBLE:
result = ((double)i0).CompareTo(d1);
break;
default:
return(null); // Should never happen.
}
break;
case DbTypeID.LONG:
switch (arg1type.ID)
{
case DbTypeID.INT:
result = l0.CompareTo((long)i1);
break;
case DbTypeID.LONG:
result = l0.CompareTo(l1);
break;
case DbTypeID.DOUBLE:
result = ((double)l0).CompareTo(d1);
break;
default:
return(null); // Should never happen.
}
break;
case DbTypeID.DOUBLE:
switch (arg1type.ID)
{
case DbTypeID.INT:
result = d0.CompareTo((double)i1);
break;
case DbTypeID.LONG:
result = d0.CompareTo((double)l1);
break;
case DbTypeID.DOUBLE:
result = d0.CompareTo(d1);
break;
default:
return(null); // Should never happen.
}
break;
default:
return(null); // Should never happen.
}
return(tools.AllocValue(result));
}
private static DbValue _PAD(string functionName, DbFunctionTools tools, DbFunctionArguments args, bool isLeft)
{
args.EnsureCount(functionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(functionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(functionName, 0, "input INT, got " + arg1type.Name.ToUpper());
}
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg2))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.CHARS)
{
args.Expected(functionName, 0, "input CHAR(n), got " + arg2type.Name.ToUpper());
}
mstring str = tools.GetString(arg0);
int totallen = tools.GetInt(arg1);
mstring padstr = tools.GetString(arg2);
if (str.Length > totallen)
{
str = str.SubstringM(0, totallen);
}
else if(str.Length < totallen)
{
int delta = totallen - str.Length;
int padlen = padstr.Length;
mstring newstr = mstring.Prepare();
for (int remain = delta; remain > 0; )
{
newstr = newstr.AppendM(padstr);
remain -= padlen;
}
//if we go over, truncate.
if (newstr.Length > delta)
{
newstr = newstr.SubstringM(0, delta);
}
if (isLeft)
{
str = newstr.AppendM(str);
}
else
{
str = str.AppendM(newstr);
}
}
return tools.AllocValue(str);
}
public static DbValue SUBSTRING(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "SUBSTRING";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
return(null);
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "count INT, got " + arg1type.Name.ToUpper());
return(null);
}
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (arg2type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 1, "count INT, got " + arg2type.Name.ToUpper());
return(null);
}
mstring x = tools.GetString(arg0);
int startIndex = tools.GetInt(arg1);
if (startIndex < 0)
{
startIndex = 0;
}
int len = tools.GetInt(arg2);
if (len < 0)
{
throw new ArgumentException(FunctionName + " length cannot be negative");
}
if (startIndex + len > x.Length)
{
return(tools.AllocValue(mstring.Prepare()));
}
else
{
mstring sub = x.SubstringM(startIndex, len);
return(tools.AllocValue(sub));
}
}
private static DbValue _PAD(string functionName, DbFunctionTools tools, DbFunctionArguments args, bool isLeft)
{
args.EnsureCount(functionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(functionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(functionName, 0, "input INT, got " + arg1type.Name.ToUpper());
}
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg2))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.CHARS)
{
args.Expected(functionName, 0, "input CHAR(n), got " + arg2type.Name.ToUpper());
}
mstring str = tools.GetString(arg0);
int totallen = tools.GetInt(arg1);
mstring padstr = tools.GetString(arg2);
if (str.Length > totallen)
{
str = str.SubstringM(0, totallen);
}
else if (str.Length < totallen)
{
int delta = totallen - str.Length;
int padlen = padstr.Length;
mstring newstr = mstring.Prepare();
for (int remain = delta; remain > 0;)
{
newstr = newstr.AppendM(padstr);
remain -= padlen;
}
//if we go over, truncate.
if (newstr.Length > delta)
{
newstr = newstr.SubstringM(0, delta);
}
if (isLeft)
{
str = newstr.AppendM(str);
}
else
{
str = str.AppendM(newstr);
}
}
return(tools.AllocValue(str));
}
public static DbValue COMPARE(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "COMPARE";
args.EnsureCount(FunctionName, 2);
int result;
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg0))
{
result = int.MaxValue;
return tools.AllocValue(result);
}
if (Types.IsNullValue(arg1))
{
result = int.MinValue;
return tools.AllocValue(result);
}
int i0 = 0, i1 = 0;
long l0 = 0, l1 = 0;
double d0 = 0, d1 = 0;
switch (arg0type.ID)
{
case DbTypeID.INT:
i0 = tools.GetInt(arg0);
break;
case DbTypeID.LONG:
l0 = tools.GetLong(arg0);
break;
case DbTypeID.DOUBLE:
d0 = tools.GetDouble(arg0);
break;
case DbTypeID.CHARS:
{
if (arg1type.ID != DbTypeID.CHARS && arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input CHAR(n) or DATETIME, got " + arg1type.Name.ToUpper());
return null; // Doesn't reach here.
}
if (arg1type.ID == DbTypeID.CHARS)
{
for (int i = 1; ; i += 2)
{
bool b1end = (i + 2 > arg0.Length) || (arg0[i] == 0 && arg0[i + 1] == 0);
bool b2end = (i + 2 > arg1.Length) || (arg1[i] == 0 && arg1[i + 1] == 0);
if (b1end)
{
if (b2end)
{
result = 0;
break;
}
result = -1;
break;
}
else if (b2end)
{
result = 1;
break;
}
int diff = Types.UTF16BytesToLowerChar(arg0[i], arg0[i + 1])
- Types.UTF16BytesToLowerChar(arg1[i], arg1[i + 1]);
if (0 != diff)
{
char ch0 = Types.UTF16BytesToChar(arg0[i], arg0[i + 1]);
char ch1 = Types.UTF16BytesToChar(arg1[i], arg1[i + 1]);
if (!Char.IsLetter(ch0) || !Char.IsLetter(ch1))
{
result = ch0 - ch1;
}
result = diff;
break;
}
}
}
else
{
string sdt = tools.GetString(arg0).ToString();
DateTime dt0 = DateTime.Parse(sdt);
DateTime dt1 = tools.GetDateTime(arg1);
result = dt0.CompareTo(dt1);
}
return tools.AllocValue(result);
}
break;
case DbTypeID.DATETIME:
{
if (arg1type.ID != DbTypeID.CHARS && arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input CHAR(n) or DATETIME, got " + arg1type.Name.ToUpper());
return null; // Doesn't reach here.
}
if (arg1type.ID == DbTypeID.DATETIME)
{
DateTime dt0 = tools.GetDateTime(arg0);
DateTime dt1 = tools.GetDateTime(arg1);
result = dt0.CompareTo(dt1);
}
else
{
DateTime dt0 = tools.GetDateTime(arg0);
string sdt = tools.GetString(arg1).ToString();
DateTime dt1 = DateTime.Parse(sdt);
result = dt0.CompareTo(dt1);
}
return tools.AllocValue(result);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got1 " + arg0type.Name.ToUpper());
return null; // Doesn't reach here.
}
switch (arg1type.ID)
{
case DbTypeID.INT:
i1 = tools.GetInt(arg1);
break;
case DbTypeID.LONG:
l1 = tools.GetLong(arg1);
break;
case DbTypeID.DOUBLE:
d1 = tools.GetDouble(arg1);
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got2 " + arg1type.Name.ToUpper());
return null; // Doesn't reach here.
}
switch (arg0type.ID)
{
case DbTypeID.INT:
switch (arg1type.ID)
{
case DbTypeID.INT:
result = i0.CompareTo(i1);
break;
case DbTypeID.LONG:
result = ((long)i0).CompareTo(l1);
break;
case DbTypeID.DOUBLE:
result = ((double)i0).CompareTo(d1);
break;
default:
return null; // Should never happen.
}
break;
case DbTypeID.LONG:
switch (arg1type.ID)
{
case DbTypeID.INT:
result = l0.CompareTo((long)i1);
break;
case DbTypeID.LONG:
result = l0.CompareTo(l1);
break;
case DbTypeID.DOUBLE:
result = ((double)l0).CompareTo(d1);
break;
default:
return null; // Should never happen.
}
break;
case DbTypeID.DOUBLE:
switch (arg1type.ID)
{
case DbTypeID.INT:
result = d0.CompareTo((double)i1);
break;
case DbTypeID.LONG:
result = d0.CompareTo((double)l1);
break;
case DbTypeID.DOUBLE:
result = d0.CompareTo(d1);
break;
default:
return null; // Should never happen.
}
break;
default:
return null; // Should never happen.
}
return tools.AllocValue(result);
}
public static DbValue SUB(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "SUB";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocValue(arg0, arg0type)); // Give a null, take a null.
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocValue(arg1, arg1type)); // Give a null, take a null.
}
switch (arg0type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int y = tools.GetInt(arg1);
return(tools.AllocValue(x - y));
}
break;
case DbTypeID.LONG:
{
long y = tools.GetLong(arg1);
return(tools.AllocValue(x - y));
}
break;
case DbTypeID.DOUBLE:
{
double y = tools.GetDouble(arg1);
return(tools.AllocValue(x - y));
}
break;
default:
args.Expected(FunctionName, 1, "input INT, LONG or DOUBLE, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int y = tools.GetInt(arg1);
return(tools.AllocValue(x - y));
}
break;
case DbTypeID.LONG:
{
long y = tools.GetLong(arg1);
return(tools.AllocValue(x - y));
}
break;
case DbTypeID.DOUBLE:
{
double y = tools.GetDouble(arg1);
return(tools.AllocValue(x - y));
}
break;
default:
args.Expected(FunctionName, 1, "input INT, LONG or DOUBLE, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
}
break;
case DbTypeID.DOUBLE:
{
double x = tools.GetDouble(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int y = tools.GetInt(arg1);
return(tools.AllocValue(x - y));
}
break;
case DbTypeID.LONG:
{
long y = tools.GetLong(arg1);
return(tools.AllocValue(x - y));
}
break;
case DbTypeID.DOUBLE:
{
double y = tools.GetDouble(arg1);
return(tools.AllocValue(x - y));
}
break;
default:
args.Expected(FunctionName, 1, "input INT, LONG or DOUBLE, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
}
public static DbValue CAST(DbFunctionTools tools, DbFunctionArguments args)
{
#if DEBUG
//System.Diagnostics.Debugger.Launch();
#endif
string FunctionName = "CAST";
args.EnsureCount(FunctionName, 2);
DbType type;
ByteSlice bs = args[0].Eval(out type);
mstring xas = tools.GetString(args[1]);
if (!xas.StartsWith("AS "))
{
#if DEBUG
throw new Exception("Expected AS <type> in CAST, not: " + xas);
#endif
throw new Exception("Expected AS <type> in CAST");
}
mstring msastype = xas.SubstringM(3);
string sastype = msastype.ToString(); // Alloc.
sastype = DbType.NormalizeName(sastype); // Alloc if char(n).
DbType astype = DbType.Prepare(sastype); // Alloc if char(n).
if (DbTypeID.NULL == astype.ID)
{
throw new Exception("Unknown AS type in CAST: " + sastype);
}
switch (astype.ID)
{
case DbTypeID.INT:
switch (type.ID)
{
case DbTypeID.INT: // as INT
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype);
case DbTypeID.LONG: // as INT
return tools.AllocValue((int)tools.GetLong(bs));
case DbTypeID.DOUBLE: // as INT
return tools.AllocValue((int)tools.GetDouble(bs));
case DbTypeID.DATETIME: // as INT
return tools.AllocValue((int)tools.GetDateTime(bs).Ticks);
case DbTypeID.CHARS: // as INT
{
int to = tools.GetString(bs).NextItemToInt32(' ');
return tools.AllocValue(to);
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.LONG:
switch (type.ID)
{
case DbTypeID.INT: // as LONG
return tools.AllocValue((long)tools.GetInt(bs));
case DbTypeID.LONG: // as LONG
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype);
case DbTypeID.DOUBLE: // as LONG
return tools.AllocValue((long)tools.GetDouble(bs));
case DbTypeID.DATETIME: // as LONG
return tools.AllocValue((long)tools.GetDateTime(bs).Ticks);
case DbTypeID.CHARS: // as LONG
{
long to = tools.GetString(bs).NextItemToInt64(' ');
return tools.AllocValue(to);
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.DOUBLE:
switch (type.ID)
{
case DbTypeID.INT: // as DOUBLE
return tools.AllocValue((double)tools.GetInt(bs));
case DbTypeID.LONG: // as DOUBLE
return tools.AllocValue((double)tools.GetLong(bs));
case DbTypeID.DOUBLE: // as DOUBLE
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype);
case DbTypeID.DATETIME: // as DOUBLE
return tools.AllocValue((double)tools.GetDateTime(bs).Ticks);
case DbTypeID.CHARS: // as DOUBLE
{
double to = tools.GetString(bs).NextItemToDouble(' ');
return tools.AllocValue(to);
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.DATETIME:
switch (type.ID)
{
case DbTypeID.INT: // as DATETIME
return tools.AllocValue(new DateTime((long)tools.GetInt(bs)));
case DbTypeID.LONG: // as DATETIME
return tools.AllocValue(new DateTime((long)tools.GetLong(bs)));
case DbTypeID.DOUBLE: // as DATETIME
return tools.AllocValue(new DateTime((long)tools.GetDouble(bs)));
case DbTypeID.DATETIME: // as DATETIME
if (astype.Size > type.Size)
{
throw new Exception("CAST: source value buffer too small");
}
return tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype);
case DbTypeID.CHARS: // as DATETIME
{
mstring to = tools.GetString(bs);
return tools.AllocValue(DateTime.Parse(to.ToString()));
}
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
case DbTypeID.CHARS:
switch (type.ID)
{
case DbTypeID.INT: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetInt(bs));
return tools.AllocValue(ms, astype.Size);
}
case DbTypeID.LONG: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetLong(bs));
return tools.AllocValue(ms, astype.Size);
}
case DbTypeID.DOUBLE: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetDouble(bs));
return tools.AllocValue(ms, astype.Size);
}
case DbTypeID.DATETIME: // as CHAR(n)
{
mstring ms = mstring.Prepare(tools.GetDateTime(bs).ToString());
return tools.AllocValue(ms, astype.Size);
}
case DbTypeID.CHARS: // as CHAR(n)
if (astype.Size > type.Size)
{
//throw new Exception("CAST: source value buffer too small");
return tools.AllocValue(tools.GetString(bs), astype.Size);
}
return tools.AllocValue(ByteSlice.Prepare(bs, 0, astype.Size), astype);
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
break;
default:
throw new Exception("Cannot handle CAST value of type " + type.Name + " AS " + astype.Name);
}
}
public static DbValue MOD(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "MOD";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
int i0, i1 = 0;
long l0, l1 = 0;
double d0, d1 = 0;
switch (arg1type.ID)
{
case DbTypeID.INT:
i1 = tools.GetInt(arg1);
break;
case DbTypeID.LONG:
l1 = tools.GetLong(arg1);
break;
case DbTypeID.DOUBLE:
d1 = tools.GetDouble(arg1);
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
if (i1 == 0 && l1 == 0 && d1 == 0)
{
args.Expected(FunctionName, 0, "Division by zero");
return(null);
}
switch (arg0type.ID)
{
case DbTypeID.INT:
{
i0 = tools.GetInt(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int rem = i0 % i1;
return(tools.AllocValue(rem));
}
break;
case DbTypeID.LONG:
{
long rem = (long)i0 % l1;
return(tools.AllocValue(rem));
}
break;
case DbTypeID.DOUBLE:
{
double rem = (double)i0 % d1;
return(tools.AllocValue(rem));
}
break;
}
}
break;
case DbTypeID.LONG:
{
l0 = tools.GetLong(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
long rem = l0 % (long)i1;
return(tools.AllocValue(rem));
}
break;
case DbTypeID.LONG:
{
long rem = l0 % l1;
return(tools.AllocValue(rem));
}
break;
case DbTypeID.DOUBLE:
{
double rem = (double)l0 % d1;
return(tools.AllocValue(rem));
}
break;
}
}
break;
case DbTypeID.DOUBLE:
{
d0 = tools.GetDouble(arg0);
switch (arg1type.ID)
{
case DbTypeID.INT:
{
double rem = d0 % (double)i1;
return(tools.AllocValue(rem));
}
break;
case DbTypeID.LONG:
{
double rem = d0 % (double)l1;
return(tools.AllocValue(rem));
}
break;
case DbTypeID.DOUBLE:
{
double rem = d0 % d1;
return(tools.AllocValue(rem));
}
break;
}
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
return(null); // Doesn't reach here.
}
public static DbValue DATEADD(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DATEADD";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 0, "input INT, got " + arg1type.Name.ToUpper());
}
if (Types.IsNullValue(arg2))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg2type.Name.ToUpper());
}
string datepart = tools.GetString(arg0).ToUpperM().ToString();
int num = tools.GetInt(arg1);
DateTime dt = tools.GetDateTime(arg2);
DateTime newdt = dt;
switch (datepart)
{
case "YEAR":
case "YY":
case "YYYY":
newdt = dt.AddYears(num);
break;
case "QUARTER":
case "QQ":
case "Q":
newdt = dt.AddMonths(num * 3);
break;
case "MONTH":
case "MM":
case "M":
newdt = dt.AddMonths(num);
break;
case "DAY":
case "DD":
case "D":
newdt = dt.AddDays(num);
break;
case "WEEK":
case "WK":
case "WW":
newdt = dt.AddDays(7 * num);
break;
case "HOUR":
case "HH":
newdt = dt.AddHours(num);
break;
case "MINUTE":
case "MI":
case "N":
newdt = dt.AddMinutes(num);
break;
case "SECOND":
case "SS":
case "S":
newdt = dt.AddSeconds(num);
break;
case "MILLISECOND":
case "MS":
newdt = dt.AddMilliseconds(num);
break;
default:
args.Expected(FunctionName, 0, "input datepart invalid");
return null;
}
return tools.AllocValue(newdt);
}
public static DbValue POWER(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "POWER";
args.EnsureCount(FunctionName, 2);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
double b = 0;
double p = 0;
switch (arg0type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg0);
b = (double)x;
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg0);
b = (double)x;
}
break;
case DbTypeID.DOUBLE:
{
b = tools.GetDouble(arg0);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
switch (arg1type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg1);
p = (double)x;
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg1);
p = (double)x;
}
break;
case DbTypeID.DOUBLE:
{
p = tools.GetDouble(arg1);
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg1type.Name.ToUpper());
return(null); // Doesn't reach here.
}
double r = Math.Pow(b, p);
return(tools.AllocValue(r));
}
public static DbValue DATEDIFF(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DATEDIFF";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg1type.Name.ToUpper());
}
if (Types.IsNullValue(arg2))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg2type.Name.ToUpper());
}
string datepart = tools.GetString(arg0).ToUpperM().ToString();
DateTime startdate = tools.GetDateTime(arg1);
DateTime enddate = tools.GetDateTime(arg2);
double partdiff = 0;
switch (datepart)
{
case "YEAR":
case "YY":
case "YYYY":
partdiff = enddate.Year - startdate.Year;
break;
case "QUARTER":
case "QQ":
case "Q":
partdiff = GetMonthDiff(startdate.Year, startdate.Month, enddate.Year, enddate.Month) / 3;
break;
case "MONTH":
case "MM":
case "M":
partdiff = GetMonthDiff(startdate.Year, startdate.Month, enddate.Year, enddate.Month);
break;
case "DAY":
case "DD":
case "D":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalDays;
}
break;
case "WEEK":
case "WK":
case "WW":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day);
TimeSpan sp = edate - sdate;
partdiff = (int)sp.TotalDays / 7;
}
break;
case "HOUR":
case "HH":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day, startdate.Hour, 0, 0);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day, enddate.Hour, 0, 0);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalHours;
}
break;
case "MINUTE":
case "MI":
case "N":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day, startdate.Hour, startdate.Minute, 0);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day, enddate.Hour, enddate.Minute, 0);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalMinutes;
}
break;
case "SECOND":
case "SS":
case "S":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day, startdate.Hour, startdate.Minute, startdate.Second);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day, enddate.Hour, enddate.Minute, enddate.Second);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalSeconds;
}
break;
case "MILLISECOND":
case "MS":
{
TimeSpan sp = enddate - startdate;
partdiff = sp.TotalMilliseconds;
}
break;
default:
args.Expected(FunctionName, 0, "input datepart invalid");
return(null);
}
return(tools.AllocValue(partdiff));
}
public static DbValue IIF(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "IIF";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
bool truecond;
if (Types.IsNullValue(arg0))
{
truecond = false;
}
else if (DbTypeID.INT == arg0type.ID)
{
truecond = 0 != tools.GetInt(arg0);
}
else if (DbTypeID.LONG == arg0type.ID)
{
truecond = 0 != tools.GetLong(arg0);
}
else if (DbTypeID.DOUBLE == arg0type.ID)
{
truecond = 0 != tools.GetDouble(arg0);
}
else
{
bool allzero = true;
for (int i = 1; i < arg0.Length; i++)
{
if (arg0[i] != 0)
{
allzero = false;
break;
}
}
truecond = !allzero;
}
byte[] resultbuf = new byte[arg1.Length > arg2.Length ? arg1.Length : arg2.Length];
DbType resulttype;
if (truecond)
{
resulttype = DbType.Prepare(resultbuf.Length, arg1type.ID);
for (int i = 0; i < arg1.Length; i++)
{
resultbuf[i] = arg1[i];
}
}
else
{
resulttype = DbType.Prepare(resultbuf.Length, arg2type.ID);
for (int i = 0; i < arg2.Length; i++)
{
resultbuf[i] = arg2[i];
}
}
return tools.AllocValue(ByteSlice.Prepare(resultbuf), resulttype);
}
public static DbValue SIGN(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "SIGN";
args.EnsureCount(FunctionName, 1);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
int sign = 0;
switch (arg0type.ID)
{
case DbTypeID.INT:
{
int x = tools.GetInt(arg0);
if (x > 0)
{
sign = 1;
}
else if (x < 0)
{
sign = -1;
}
}
break;
case DbTypeID.LONG:
{
long x = tools.GetLong(arg0);
if (x > 0)
{
sign = 1;
}
else if (x < 0)
{
sign = -1;
}
}
break;
case DbTypeID.DOUBLE:
{
double x = tools.GetDouble(arg0);
if (x > 0)
{
sign = 1;
}
else if (x < 0)
{
sign = -1;
}
}
break;
default:
args.Expected(FunctionName, 0, "input INT, LONG or DOUBLE, got " + arg0type.Name.ToUpper());
return(null); // Doesn't reach here.
}
return(tools.AllocValue(sign));
}
public static DbValue DATEADD(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DATEADD";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg0))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (Types.IsNullValue(arg1))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.INT)
{
args.Expected(FunctionName, 0, "input INT, got " + arg1type.Name.ToUpper());
}
if (Types.IsNullValue(arg2))
{
return(tools.AllocNullValue()); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg2type.Name.ToUpper());
}
string datepart = tools.GetString(arg0).ToUpperM().ToString();
int num = tools.GetInt(arg1);
DateTime dt = tools.GetDateTime(arg2);
DateTime newdt = dt;
switch (datepart)
{
case "YEAR":
case "YY":
case "YYYY":
newdt = dt.AddYears(num);
break;
case "QUARTER":
case "QQ":
case "Q":
newdt = dt.AddMonths(num * 3);
break;
case "MONTH":
case "MM":
case "M":
newdt = dt.AddMonths(num);
break;
case "DAY":
case "DD":
case "D":
newdt = dt.AddDays(num);
break;
case "WEEK":
case "WK":
case "WW":
newdt = dt.AddDays(7 * num);
break;
case "HOUR":
case "HH":
newdt = dt.AddHours(num);
break;
case "MINUTE":
case "MI":
case "N":
newdt = dt.AddMinutes(num);
break;
case "SECOND":
case "SS":
case "S":
newdt = dt.AddSeconds(num);
break;
case "MILLISECOND":
case "MS":
newdt = dt.AddMilliseconds(num);
break;
default:
args.Expected(FunctionName, 0, "input datepart invalid");
return(null);
}
return(tools.AllocValue(newdt));
}
public static DbValue DATEDIFF(DbFunctionTools tools, DbFunctionArguments args)
{
string FunctionName = "DATEDIFF";
args.EnsureCount(FunctionName, 3);
DbType arg0type;
ByteSlice arg0 = args[0].Eval(out arg0type);
DbType arg1type;
ByteSlice arg1 = args[1].Eval(out arg1type);
DbType arg2type;
ByteSlice arg2 = args[2].Eval(out arg2type);
if (Types.IsNullValue(arg0))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg0type.ID != DbTypeID.CHARS)
{
args.Expected(FunctionName, 0, "input CHAR(n), got " + arg0type.Name.ToUpper());
}
if (Types.IsNullValue(arg1))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg1type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg1type.Name.ToUpper());
}
if (Types.IsNullValue(arg2))
{
return tools.AllocNullValue(); // Give a null, take a null.
}
if (arg2type.ID != DbTypeID.DATETIME)
{
args.Expected(FunctionName, 0, "input DATETIME, got " + arg2type.Name.ToUpper());
}
string datepart = tools.GetString(arg0).ToUpperM().ToString();
DateTime startdate = tools.GetDateTime(arg1);
DateTime enddate = tools.GetDateTime(arg2);
double partdiff = 0;
switch (datepart)
{
case "YEAR":
case "YY":
case "YYYY":
partdiff = enddate.Year - startdate.Year;
break;
case "QUARTER":
case "QQ":
case "Q":
partdiff = GetMonthDiff(startdate.Year, startdate.Month, enddate.Year, enddate.Month) / 3;
break;
case "MONTH":
case "MM":
case "M":
partdiff = GetMonthDiff(startdate.Year, startdate.Month, enddate.Year, enddate.Month);
break;
case "DAY":
case "DD":
case "D":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalDays;
}
break;
case "WEEK":
case "WK":
case "WW":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day);
TimeSpan sp = edate - sdate;
partdiff = (int)sp.TotalDays / 7;
}
break;
case "HOUR":
case "HH":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day, startdate.Hour, 0, 0);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day, enddate.Hour, 0, 0);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalHours;
}
break;
case "MINUTE":
case "MI":
case "N":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day, startdate.Hour, startdate.Minute, 0);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day, enddate.Hour, enddate.Minute, 0);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalMinutes;
}
break;
case "SECOND":
case "SS":
case "S":
{
DateTime sdate = new DateTime(startdate.Year, startdate.Month, startdate.Day, startdate.Hour, startdate.Minute, startdate.Second);
DateTime edate = new DateTime(enddate.Year, enddate.Month, enddate.Day, enddate.Hour, enddate.Minute, enddate.Second);
TimeSpan sp = edate - sdate;
partdiff = sp.TotalSeconds;
}
break;
case "MILLISECOND":
case "MS":
{
TimeSpan sp = enddate - startdate;
partdiff = sp.TotalMilliseconds;
}
break;
default:
args.Expected(FunctionName, 0, "input datepart invalid");
return null;
}
return tools.AllocValue(partdiff);
}