%PDF-
%PDF-
Mini Shell
Mini Shell
#include "sass.hpp"
#include "operators.hpp"
namespace Sass {
namespace Operators {
inline double add(double x, double y) { return x + y; }
inline double sub(double x, double y) { return x - y; }
inline double mul(double x, double y) { return x * y; }
inline double div(double x, double y) { return x / y; } // x/0 checked by caller
inline double mod(double x, double y) { // x/0 checked by caller
if ((x > 0 && y < 0) || (x < 0 && y > 0)) {
double ret = std::fmod(x, y);
return ret ? ret + y : ret;
} else {
return std::fmod(x, y);
}
}
typedef double (*bop)(double, double);
bop ops[Sass_OP::NUM_OPS] = {
0, 0, // and, or
0, 0, 0, 0, 0, 0, // eq, neq, gt, gte, lt, lte
add, sub, mul, div, mod
};
/* static function, has no pstate or traces */
bool eq(Expression_Obj lhs, Expression_Obj rhs)
{
// operation is undefined if one is not a number
if (!lhs || !rhs) throw Exception::UndefinedOperation(lhs, rhs, Sass_OP::EQ);
// use compare operator from ast node
return *lhs == *rhs;
}
/* static function, throws OperationError, has no pstate or traces */
bool cmp(Expression_Obj lhs, Expression_Obj rhs, const Sass_OP op)
{
// can only compare numbers!?
Number_Obj l = Cast<Number>(lhs);
Number_Obj r = Cast<Number>(rhs);
// operation is undefined if one is not a number
if (!l || !r) throw Exception::UndefinedOperation(lhs, rhs, op);
// use compare operator from ast node
return *l < *r;
}
/* static functions, throws OperationError, has no pstate or traces */
bool lt(Expression_Obj lhs, Expression_Obj rhs) { return cmp(lhs, rhs, Sass_OP::LT); }
bool neq(Expression_Obj lhs, Expression_Obj rhs) { return eq(lhs, rhs) == false; }
bool gt(Expression_Obj lhs, Expression_Obj rhs) { return !cmp(lhs, rhs, Sass_OP::GT) && neq(lhs, rhs); }
bool lte(Expression_Obj lhs, Expression_Obj rhs) { return cmp(lhs, rhs, Sass_OP::LTE) || eq(lhs, rhs); }
bool gte(Expression_Obj lhs, Expression_Obj rhs) { return !cmp(lhs, rhs, Sass_OP::GTE) || eq(lhs, rhs); }
/* colour math deprecation warning */
void op_color_deprecation(enum Sass_OP op, std::string lsh, std::string rhs, const ParserState& pstate)
{
std::string op_str(
op == Sass_OP::ADD ? "plus" :
op == Sass_OP::DIV ? "div" :
op == Sass_OP::SUB ? "minus" :
op == Sass_OP::MUL ? "times" : ""
);
std::string msg("The operation `" + lsh + " " + op_str + " " + rhs + "` is deprecated and will be an error in future versions.");
std::string tail("Consider using Sass's color functions instead.\nhttp://sass-lang.com/documentation/Sass/Script/Functions.html#other_color_functions");
deprecated(msg, tail, false, pstate);
}
/* static function, throws OperationError, has no traces but optional pstate for returned value */
Value_Ptr op_strings(Sass::Operand operand, Value& lhs, Value& rhs, struct Sass_Inspect_Options opt, const ParserState& pstate, bool delayed)
{
enum Sass_OP op = operand.operand;
String_Quoted_Ptr lqstr = Cast<String_Quoted>(&lhs);
String_Quoted_Ptr rqstr = Cast<String_Quoted>(&rhs);
std::string lstr(lqstr ? lqstr->value() : lhs.to_string(opt));
std::string rstr(rqstr ? rqstr->value() : rhs.to_string(opt));
if (Cast<Null>(&lhs)) throw Exception::InvalidNullOperation(&lhs, &rhs, op);
if (Cast<Null>(&rhs)) throw Exception::InvalidNullOperation(&lhs, &rhs, op);
std::string sep;
switch (op) {
case Sass_OP::ADD: sep = ""; break;
case Sass_OP::SUB: sep = "-"; break;
case Sass_OP::DIV: sep = "/"; break;
case Sass_OP::EQ: sep = "=="; break;
case Sass_OP::NEQ: sep = "!="; break;
case Sass_OP::LT: sep = "<"; break;
case Sass_OP::GT: sep = ">"; break;
case Sass_OP::LTE: sep = "<="; break;
case Sass_OP::GTE: sep = ">="; break;
default:
throw Exception::UndefinedOperation(&lhs, &rhs, op);
break;
}
if (op == Sass_OP::ADD) {
// create string that might be quoted on output (but do not unquote what we pass)
return SASS_MEMORY_NEW(String_Quoted, pstate, lstr + rstr, 0, false, true);
}
// add whitespace around operator
// but only if result is not delayed
if (sep != "" && delayed == false) {
if (operand.ws_before) sep = " " + sep;
if (operand.ws_after) sep = sep + " ";
}
if (op == Sass_OP::SUB || op == Sass_OP::DIV) {
if (lqstr && lqstr->quote_mark()) lstr = quote(lstr);
if (rqstr && rqstr->quote_mark()) rstr = quote(rstr);
}
return SASS_MEMORY_NEW(String_Constant, pstate, lstr + sep + rstr);
}
/* static function, throws OperationError, has no traces but optional pstate for returned value */
Value_Ptr op_colors(enum Sass_OP op, const Color& lhs, const Color& rhs, struct Sass_Inspect_Options opt, const ParserState& pstate, bool delayed)
{
if (lhs.a() != rhs.a()) {
throw Exception::AlphaChannelsNotEqual(&lhs, &rhs, op);
}
if ((op == Sass_OP::DIV || op == Sass_OP::MOD) && (!rhs.r() || !rhs.g() || !rhs.b())) {
throw Exception::ZeroDivisionError(lhs, rhs);
}
op_color_deprecation(op, lhs.to_string(), rhs.to_string(), pstate);
return SASS_MEMORY_NEW(Color,
pstate,
ops[op](lhs.r(), rhs.r()),
ops[op](lhs.g(), rhs.g()),
ops[op](lhs.b(), rhs.b()),
lhs.a());
}
/* static function, throws OperationError, has no traces but optional pstate for returned value */
Value_Ptr op_numbers(enum Sass_OP op, const Number& lhs, const Number& rhs, struct Sass_Inspect_Options opt, const ParserState& pstate, bool delayed)
{
double lval = lhs.value();
double rval = rhs.value();
if (op == Sass_OP::MOD && rval == 0) {
return SASS_MEMORY_NEW(String_Quoted, pstate, "NaN");
}
if (op == Sass_OP::DIV && rval == 0) {
std::string result(lval ? "Infinity" : "NaN");
return SASS_MEMORY_NEW(String_Quoted, pstate, result);
}
size_t l_n_units = lhs.numerators.size();
size_t l_d_units = lhs.numerators.size();
size_t r_n_units = rhs.denominators.size();
size_t r_d_units = rhs.denominators.size();
// optimize out the most common and simplest case
if (l_n_units == r_n_units && l_d_units == r_d_units) {
if (l_n_units + l_d_units <= 1 && r_n_units + r_d_units <= 1) {
if (lhs.numerators == rhs.numerators) {
if (lhs.denominators == rhs.denominators) {
Number_Ptr v = SASS_MEMORY_COPY(&lhs);
v->value(ops[op](lval, rval));
return v;
}
}
}
}
Number_Obj v = SASS_MEMORY_COPY(&lhs);
if (lhs.is_unitless() && (op == Sass_OP::ADD || op == Sass_OP::SUB || op == Sass_OP::MOD)) {
v->numerators = rhs.numerators;
v->denominators = rhs.denominators;
}
if (op == Sass_OP::MUL) {
v->value(ops[op](lval, rval));
v->numerators.insert(v->numerators.end(),
rhs.numerators.begin(), rhs.numerators.end()
);
v->denominators.insert(v->denominators.end(),
rhs.denominators.begin(), rhs.denominators.end()
);
v->reduce();
}
else if (op == Sass_OP::DIV) {
v->value(ops[op](lval, rval));
v->numerators.insert(v->numerators.end(),
rhs.denominators.begin(), rhs.denominators.end()
);
v->denominators.insert(v->denominators.end(),
rhs.numerators.begin(), rhs.numerators.end()
);
v->reduce();
}
else {
Number ln(lhs), rn(rhs);
ln.reduce(); rn.reduce();
double f(rn.convert_factor(ln));
v->value(ops[op](lval, rn.value() * f));
}
v->pstate(pstate);
return v.detach();
}
/* static function, throws OperationError, has no traces but optional pstate for returned value */
Value_Ptr op_number_color(enum Sass_OP op, const Number& lhs, const Color& rhs, struct Sass_Inspect_Options opt, const ParserState& pstate, bool delayed)
{
double lval = lhs.value();
switch (op) {
case Sass_OP::ADD:
case Sass_OP::MUL: {
op_color_deprecation(op, lhs.to_string(), rhs.to_string(opt), pstate);
return SASS_MEMORY_NEW(Color,
pstate,
ops[op](lval, rhs.r()),
ops[op](lval, rhs.g()),
ops[op](lval, rhs.b()),
rhs.a());
}
case Sass_OP::SUB:
case Sass_OP::DIV: {
std::string color(rhs.to_string(opt));
op_color_deprecation(op, lhs.to_string(), color, pstate);
return SASS_MEMORY_NEW(String_Quoted,
pstate,
lhs.to_string(opt)
+ sass_op_separator(op)
+ color);
}
default: break;
}
throw Exception::UndefinedOperation(&lhs, &rhs, op);
}
/* static function, throws OperationError, has no traces but optional pstate for returned value */
Value_Ptr op_color_number(enum Sass_OP op, const Color& lhs, const Number& rhs, struct Sass_Inspect_Options opt, const ParserState& pstate, bool delayed)
{
double rval = rhs.value();
if ((op == Sass_OP::DIV || op == Sass_OP::DIV) && rval == 0) {
// comparison of Fixnum with Float failed?
throw Exception::ZeroDivisionError(lhs, rhs);
}
op_color_deprecation(op, lhs.to_string(), rhs.to_string(), pstate);
return SASS_MEMORY_NEW(Color,
pstate,
ops[op](lhs.r(), rval),
ops[op](lhs.g(), rval),
ops[op](lhs.b(), rval),
lhs.a());
}
}
}
Zerion Mini Shell 1.0