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#include "stdafx.h"
#include "Row.h"
#include "Exception.h"
namespace sql {
const GcType Row::elemType = {
GcType::tArray,
null,
null,
sizeof(Row::Element),
1,
{ OFFSET_OF(Row::Element, object) },
};
Row::Row() : data(null) {}
Row::Row(Builder b) : data(b.data) {
assert(data->filled == data->count, L"Data array was not properly filled before creating a row!");
}
void Row::deepCopy(CloneEnv *env) {
GcArray<Element> *copy = runtime::allocArray<Element>(env->engine(), &elemType, data->count);
memcpy(©->v[0], &data->v[0], sizeof(Element) * data->count);
data = copy;
}
const Row::Element &Row::checkIndex(Nat index) const {
if (!data || index >= data->count)
throw new (runtime::someEngine()) ArrayError(index, data ? Nat(data->count) : 0);
return data->v[index];
}
void Row::throwTypeError(const wchar *expected, const Element &found) const {
Engine &e = runtime::someEngine();
StrBuf *msg = new (e) StrBuf();
*msg << S("Expected type of column: ") << expected
<< S(", but column has type: ");
switch (size_t(found.object)) {
case COL_NULL:
*msg << S("NULL");
break;
case COL_LONG:
*msg << S("Long");
break;
case COL_DOUBLE:
*msg << S("Double");
break;
default:
if (size_t(found.object) < COL_LAST) {
*msg << S("<unknown>");
} else {
*msg << runtime::typeName(runtime::typeOf((RootObject *)found.object));
}
break;
}
throw new (e) SQLError(msg->toS());
}
Str *Row::getStr(Nat index) const {
const Element &e = checkIndex(index);
if (size_t(e.object) < COL_LAST)
throwTypeError(S("Str"), e);
Object *o = (Object *)e.object;
if (Str *s = as<Str>(o))
return s;
throwTypeError(S("Str"), e);
return null;
}
Bool Row::getBool(Nat index) const {
return getLong(index) != 0;
}
Int Row::getInt(Nat index) const {
return Int(getLong(index));
}
Long Row::getLong(Nat index) const {
const Element &e = checkIndex(index);
if (size_t(e.object) != COL_LONG)
throwTypeError(S("Long"), e);
return e.l;
}
Float Row::getFloat(Nat index) const {
return Float(getDouble(index));
}
Double Row::getDouble(Nat index) const {
const Element &e = checkIndex(index);
if (size_t(e.object) != COL_DOUBLE)
throwTypeError(S("Double"), e);
return e.d;
}
Bool Row::isNull(Nat index) const {
const Element &e = checkIndex(index);
return e.object == null;
}
Variant at(EnginePtr engine, const Row &row, Nat index) {
const Row::Element &e = row.checkIndex(index);
switch (size_t(e.object)) {
case Row::COL_NULL:
return Variant();
case Row::COL_LONG:
return Variant(e.l, engine.v);
case Row::COL_DOUBLE:
return Variant(e.d, engine.v);
default:
return Variant((RootObject *)e.object);
}
}
Row::Builder::Builder(GcArray<Element> *elems) : data(elems) {
elems->filled = 0;
}
Row::Builder Row::builder(EnginePtr e, Nat columns) {
return Builder(runtime::allocArray<Row::Element>(e.v, &elemType, columns));
}
Row::Element &Row::Builder::next() {
if (data->filled >= data->count)
throw new (runtime::someEngine()) ArrayError(Nat(data->filled), Nat(data->count));
return data->v[data->filled++];
}
void Row::Builder::push(Str *v) {
Element &e = next();
e.object = v;
}
void Row::Builder::push(Long l) {
Element &e = next();
e.object = (void *)COL_LONG;
e.l = l;
}
void Row::Builder::push(Double d) {
Element &e = next();
e.object = (void *)COL_DOUBLE;
e.d = d;
}
void Row::Builder::pushNull() {
Element &e = next();
e.object = null;
}
void Row::toS(StrBuf *to) const {
*to << S("row: ");
for (Nat i = 0; i < count(); i++) {
if (i > 0)
*to << S(", ");
// Note: slower than necessary, but OK for debugging.
*to << at(to->engine(), *this, i);
}
}
}
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