bool User_Program::Math (void)
{
int l1, l2;
double f1, f2;
const char *math_types [] = {"Plus", "Minus", "Multiply", "Divide", "Modulo", "Power", "Negative"};
if (cmd_ptr->token == NEGATIVE) {
if (s->type == STRUCT_DATA || s->type == STRING_DATA) goto error;
//---- reverse the sign ----
if (s->type == INT_DATA) {
s->lvalue = -(s->lvalue);
} else if (s->type == FLOAT_DATA) {
s->fvalue = -(s->fvalue);
} else {
goto error;
}
return (true);
}
if (s->type == STRUCT_DATA || s1->type == STRUCT_DATA) goto error;
//---- process the data types ----
if (s->type == STRING_DATA || s1->type == STRING_DATA) {
//---- string contatination ----
if (cmd_ptr->token != PLUS ||
s->type != STRING_DATA ||
s1->type != STRING_DATA) goto error;
*(s1->str_ptr) += *(s->str_ptr);
} else if (s1->type == FLOAT_DATA || s->type == FLOAT_DATA) {
//---- floating point math ----
if (s1->type == FLOAT_DATA) {
f1 = s1->fvalue;
} else {
f1 = s1->lvalue;
}
if (s->type == FLOAT_DATA) {
f2 = s->fvalue;
} else {
f2 = s->lvalue;
}
switch (cmd_ptr->token) {
case PLUS:
f1 += f2;
break;
case MINUS:
f1 -= f2;
break;
case MULTIPLY:
f1 *= f2;
break;
case DIVIDE:
if (f2) {
f1 /= f2;
}
break;
case MODULO:
if (f2) {
f1 = (f1 / f2) - 1.0;
}
break;
case POWER:
f1 = pow (f1, f2);
break;
case FMIN:
if (f2 < f1) f1 = f2;
break;
case FMAX:
if (f2 > f1) f1 = f2;
break;
default:
goto token_error;
break;
}
s1->type = FLOAT_DATA;
s1->fvalue = f1;
} else {
l1 = s1->lvalue;
l2 = s->lvalue;
switch (cmd_ptr->token) {
case PLUS:
l1 += l2;
break;
case MINUS:
l1 -= l2;
break;
case MULTIPLY:
l1 *= l2;
break;
case DIVIDE:
if (l2) {
l1 /= l2;
}
break;
case MODULO:
if (l2) {
l1 %= l2;
}
break;
case POWER:
l1 = (int) pow ((double) l1, (double) l2);
break;
case FMIN:
if (l2 < l1) l1 = l2;
break;
case FMAX:
if (l2 > l1) l1 = l2;
break;
default:
goto token_error;
break;
}
s1->type = INT_DATA;
s1->lvalue = l1;
}
s = &stack [--sindex];
return (true);
error:
if (cmd_ptr->token == FMIN || cmd_ptr->token == FMAX) {
exe->Error (String ("Function \"%s\" does not support %s Data") %
Token_Name (FUNCTION, cmd_ptr->token) % Data_Type (s->type));
} else {
exe->Error (String ("%s Operator does not support %s Data") %
math_types [cmd_ptr->token - PLUS] % Data_Type (s->type));
}
return (false);
token_error:
exe->Error (String ("Unrecognized Math Token = %d") % cmd_ptr->token);
return (false);
}
bool User_Program::Convert (void)
{
String *str_ptr;
//--- sub string function ----
if (cmd_ptr->token == SUBSTR) {
int i1, i2, len;
if (sindex <= 2) goto string_error;
Stack_Data *s2 = &stack [sindex - 2];
if (s2->type != STRING_DATA || s1->type != INT_DATA ||
s->type != INT_DATA) goto string_error;
i1 = s1->lvalue;
i2 = s->lvalue;
str_ptr = s2->str_ptr;
len = (int) str_ptr->length ();
if (i1 < 0) i1 = 0;
if (i2 < i1) i2 = i1;
if (i2 > len) {
i2 = len;
if (i1 > i2) i1 = i2;
}
len = i2 - i1 + 1;
(*str_ptr) = str_ptr->substr (i1, len);
sindex -= 2;
s = s2;
s->str_ptr = str_ptr;
return (true);
} else if (cmd_ptr->token == TRIM) {
if (s->type != STRING_DATA) {
exe->Error ("Illegal TRIM Function Syntax");
return (false);
}
s->str_ptr->Trim ();
return (true);
}
//---- type conversion functions ----
if (s->type == STRUCT_DATA) goto error;
if (cmd_ptr->token != ATOI && cmd_ptr->token != ATOF) {
if (s->type == STRING_DATA) goto error;
} else {
if (s->type != STRING_DATA) goto error;
}
switch (cmd_ptr->token) {
case FINT:
if (s->type == FLOAT_DATA) {
s->type = INT_DATA;
s->lvalue = (int) s->fvalue;
}
break;
case FFLOAT:
if (s->type == INT_DATA) {
s->type = FLOAT_DATA;
s->fvalue = (double) s->lvalue;
}
break;
case ROUND:
if (s->type == FLOAT_DATA) {
s->type = INT_DATA;
s->lvalue = (int) (s->fvalue + 0.5);
}
break;
case ATOI:
s->type = INT_DATA;
s->lvalue = s->str_ptr->Integer ();
break;
case ATOF:
s->type = FLOAT_DATA;
s->fvalue = s->str_ptr->Double ();
break;
case ITOA:
if (s->type == FLOAT_DATA) {
s->lvalue = (int) s->fvalue;
}
str_ptr = &svalue [0];
(*str_ptr)("%d") % s->lvalue;
s->type = STRING_DATA;
s->str_ptr = str_ptr;
break;
case FTOA:
if (s->type == INT_DATA) {
s->fvalue = s->lvalue;
}
str_ptr = &svalue [0];
(*str_ptr)("%lf") % s->fvalue;
s->type = STRING_DATA;
s->str_ptr = str_ptr;
break;
case TTOI:
if (s->type == FLOAT_DATA) {
s->lvalue = (int) s->fvalue;
}
s->type = INT_DATA;
s->lvalue /= 10;
break;
case TTOF:
if (s->type == INT_DATA) {
s->fvalue = s->lvalue;
}
s->type = FLOAT_DATA;
s->fvalue /= 10.0;
break;
case ITOT:
if (s->type == FLOAT_DATA) {
s->lvalue = (int) s->fvalue;
}
s->type = INT_DATA;
s->lvalue *= 10;
break;
case FTOT:
if (s->type == INT_DATA) {
s->fvalue = s->lvalue;
}
s->type = FLOAT_DATA;
s->fvalue *= 10.0;
break;
default:
goto token_error;
break;
}
return (true);
error:
exe->Error (String ("Conversion \"%s\" does not support %s Data") %
Token_Name (CONVERT, cmd_ptr->token) % Data_Type (s->type));
return (false);
token_error:
exe->Error (String ("Conversion Token %d was Unrecognized") % cmd_ptr->token);
return (false);
string_error:
exe->Error ("Illegal SUBSTR Function Syntax");
return (false);
}