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types.cc
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#include "lslmini.hh"
#include "types.hh"
#define LST_ANY -1
#define LST_NONE -2
#define LST_BOOLEAN LST_INTEGER // for clarity
// TODO: use structs or something here
const static int coercion_table[][2] = {
// wanted type acceptable type
{ LST_FLOATINGPOINT, LST_INTEGER },
{ LST_STRING, LST_KEY },
{ LST_KEY, LST_STRING },
{ -1, -1 },
};
const static int operator_result_table[][4] = {
// operator left type right type result type
// ++
{ INC_OP, LST_INTEGER, LST_NONE, LST_INTEGER },
{ INC_OP, LST_FLOATINGPOINT, LST_NONE, LST_FLOATINGPOINT },
// --
{ DEC_OP, LST_INTEGER, LST_NONE, LST_INTEGER },
{ DEC_OP, LST_FLOATINGPOINT, LST_NONE, LST_FLOATINGPOINT },
// =
{ '=', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '=', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '=', LST_FLOATINGPOINT, LST_INTEGER, LST_FLOATINGPOINT },
{ '=', LST_STRING, LST_STRING, LST_STRING },
{ '=', LST_STRING, LST_KEY, LST_STRING },
{ '=', LST_KEY, LST_STRING, LST_KEY },
{ '=', LST_KEY, LST_KEY, LST_KEY },
{ '=', LST_VECTOR, LST_VECTOR, LST_VECTOR },
{ '=', LST_QUATERNION, LST_QUATERNION, LST_QUATERNION },
{ '=', LST_LIST, LST_LIST, LST_LIST },
// -
{ '-', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '-', LST_INTEGER, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '-', LST_FLOATINGPOINT, LST_INTEGER, LST_FLOATINGPOINT },
{ '-', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '-', LST_VECTOR, LST_VECTOR, LST_VECTOR },
{ '-', LST_QUATERNION, LST_QUATERNION, LST_QUATERNION },
// unary -
{ '-', LST_INTEGER, LST_NONE, LST_INTEGER },
{ '-', LST_FLOATINGPOINT, LST_NONE, LST_FLOATINGPOINT },
{ '-', LST_VECTOR, LST_NONE, LST_VECTOR },
{ '-', LST_QUATERNION, LST_NONE, LST_QUATERNION },
// TODO: does (rotation - rotation) work ?
// +
{ '+', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '+', LST_INTEGER, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '+', LST_FLOATINGPOINT, LST_INTEGER, LST_FLOATINGPOINT },
{ '+', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '+', LST_STRING, LST_STRING, LST_STRING },
{ '+', LST_VECTOR, LST_VECTOR, LST_VECTOR },
{ '+', LST_QUATERNION, LST_QUATERNION, LST_QUATERNION },
{ '+', LST_LIST, LST_ANY, LST_LIST },
{ '+', LST_ANY, LST_LIST, LST_LIST },
// *
{ '*', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '*', LST_INTEGER, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '*', LST_INTEGER, LST_VECTOR, LST_VECTOR }, // scale vector
{ '*', LST_FLOATINGPOINT, LST_INTEGER, LST_FLOATINGPOINT },
{ '*', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '*', LST_FLOATINGPOINT, LST_VECTOR, LST_VECTOR }, // scale vector
{ '*', LST_VECTOR, LST_INTEGER, LST_VECTOR }, // scale vector
{ '*', LST_VECTOR, LST_FLOATINGPOINT, LST_VECTOR }, // scale vector
{ '*', LST_VECTOR, LST_VECTOR, LST_FLOATINGPOINT }, // dot product
{ '*', LST_VECTOR, LST_QUATERNION, LST_VECTOR }, // rotate
{ '*', LST_QUATERNION, LST_QUATERNION, LST_QUATERNION },
// /
{ '/', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '/', LST_INTEGER, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '/', LST_FLOATINGPOINT, LST_INTEGER, LST_FLOATINGPOINT },
{ '/', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_FLOATINGPOINT },
{ '/', LST_VECTOR, LST_INTEGER, LST_VECTOR }, // scale vector
{ '/', LST_VECTOR, LST_FLOATINGPOINT, LST_VECTOR }, // scale vector
{ '/', LST_VECTOR, LST_QUATERNION, LST_VECTOR }, // TODO: what does this do
{ '/', LST_QUATERNION, LST_QUATERNION, LST_QUATERNION }, // TODO: what does this do
// %
{ '%', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '%', LST_VECTOR, LST_VECTOR, LST_VECTOR }, // cross product
// >
{ '>', LST_INTEGER, LST_INTEGER, LST_BOOLEAN },
{ '>', LST_INTEGER, LST_FLOATINGPOINT, LST_BOOLEAN },
{ '>', LST_FLOATINGPOINT, LST_INTEGER, LST_BOOLEAN },
{ '>', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_BOOLEAN },
// <
{ '<', LST_INTEGER, LST_INTEGER, LST_BOOLEAN },
{ '<', LST_INTEGER, LST_FLOATINGPOINT, LST_BOOLEAN },
{ '<', LST_FLOATINGPOINT, LST_INTEGER, LST_BOOLEAN },
{ '<', LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_BOOLEAN },
// ==
{ EQ, LST_INTEGER, LST_INTEGER, LST_BOOLEAN },
{ EQ, LST_INTEGER, LST_FLOATINGPOINT, LST_BOOLEAN },
{ EQ, LST_FLOATINGPOINT, LST_INTEGER, LST_BOOLEAN },
{ EQ, LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_BOOLEAN },
{ EQ, LST_VECTOR, LST_VECTOR, LST_BOOLEAN },
{ EQ, LST_QUATERNION, LST_QUATERNION, LST_BOOLEAN },
{ EQ, LST_STRING, LST_STRING, LST_BOOLEAN },
{ EQ, LST_STRING, LST_KEY, LST_BOOLEAN },
{ EQ, LST_KEY, LST_STRING, LST_BOOLEAN },
{ EQ, LST_KEY, LST_KEY, LST_BOOLEAN },
{ EQ, LST_LIST, LST_LIST, LST_BOOLEAN }, // compares list lengths
// !=
{ NEQ, LST_INTEGER, LST_INTEGER, LST_BOOLEAN },
{ NEQ, LST_INTEGER, LST_FLOATINGPOINT, LST_BOOLEAN },
{ NEQ, LST_FLOATINGPOINT, LST_INTEGER, LST_BOOLEAN },
{ NEQ, LST_FLOATINGPOINT, LST_FLOATINGPOINT, LST_BOOLEAN },
{ NEQ, LST_VECTOR, LST_VECTOR, LST_BOOLEAN },
{ NEQ, LST_QUATERNION, LST_QUATERNION, LST_BOOLEAN },
{ NEQ, LST_STRING, LST_STRING, LST_BOOLEAN },
{ NEQ, LST_STRING, LST_KEY, LST_BOOLEAN }, // strcmp in LSO, != in Mono
{ NEQ, LST_KEY, LST_STRING, LST_BOOLEAN },
{ NEQ, LST_KEY, LST_KEY, LST_BOOLEAN },
{ NEQ, LST_LIST, LST_LIST, LST_BOOLEAN }, // subtracts list lengths
// bitwise operators
{ '&', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '|', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '^', LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ '~', LST_INTEGER, LST_NONE, LST_INTEGER },
// boolean opeartors
{ '!', LST_INTEGER, LST_NONE, LST_BOOLEAN },
{ BOOLEAN_AND,LST_INTEGER, LST_INTEGER, LST_BOOLEAN },
{ BOOLEAN_OR, LST_INTEGER, LST_INTEGER, LST_BOOLEAN },
// shift operators
{ SHIFT_LEFT, LST_INTEGER, LST_INTEGER, LST_INTEGER },
{ SHIFT_RIGHT,LST_INTEGER, LST_INTEGER, LST_INTEGER },
// end
{ -1, -1, -1, -1 },
};
std::vector<LLScriptType*> LLScriptType::types;
bool LLScriptType::can_coerce( LLScriptType *to ) {
int i;
// error type matches anything
if ( get_itype() == LST_ERROR || to->get_itype() == LST_ERROR )
return true;
// if we're already of the target type, then of course we can be used for it
if ( get_itype() == to->get_itype() )
return true;
for ( i = 0; coercion_table[i][1] != -1; i++ ) {
if ( coercion_table[i][1] == get_itype() && coercion_table[i][0] == to->get_itype() ) {
return true;
}
}
return false;
}
class LLScriptType *LLScriptType::get_result_type(int op, LLScriptType *right) {
int i;
// error on either side is always error
if ( get_itype() == LST_ERROR || (right != NULL && right->get_itype() == LST_ERROR) )
return TYPE(LST_ERROR);
// go through each entry in the operator result table
for ( i = 0; operator_result_table[i][0] != -1; i++ ) {
// if the operator is the one we're looking for
if ( operator_result_table[i][0] == op ) {
// if the left side matches our left side
if ( operator_result_table[i][1] == get_itype() || operator_result_table[i][1] == LST_ANY ) {
// right isn't empty and matches our side
if ( ( right != NULL &&
(operator_result_table[i][2] == LST_ANY ||
operator_result_table[i][2] == (int)right->get_itype())
) || // or right IS empty and matches nothing
( right == NULL &&
(operator_result_table[i][2] == LST_NONE)
)
)
{ // send back the type
return TYPE((LST_TYPE)operator_result_table[i][3]);
}
}
}
}
return NULL;
}