/* ES5 15.12.3 JO. */
static JSBool
JO(JSContext *cx, HandleObject obj, StringifyContext *scx)
{
/*
* This method implements the JO algorithm in ES5 15.12.3, but:
*
* * The algorithm is somewhat reformulated to allow the final string to
* be streamed into a single buffer, rather than be created and copied
* into place incrementally as the ES5 algorithm specifies it. This
* requires moving portions of the Str call in 8a into this algorithm
* (and in JA as well).
*/
/* Steps 1-2, 11. */
CycleDetector detect(cx, scx, obj);
if (!detect.init(cx))
return JS_FALSE;
if (!scx->sb.append('{'))
return JS_FALSE;
/* Steps 5-7. */
Maybe<AutoIdVector> ids;
const AutoIdVector *props;
if (scx->replacer && !scx->replacer->isCallable()) {
JS_ASSERT(JS_IsArrayObject(cx, scx->replacer));
props = &scx->propertyList;
} else {
JS_ASSERT_IF(scx->replacer, scx->propertyList.length() == 0);
ids.construct(cx);
if (!GetPropertyNames(cx, obj, JSITER_OWNONLY, ids.addr()))
return false;
props = ids.addr();
}
/* My kingdom for not-quite-initialized-from-the-start references. */
const AutoIdVector &propertyList = *props;
/* Steps 8-10, 13. */
bool wroteMember = false;
for (size_t i = 0, len = propertyList.length(); i < len; i++) {
/*
* Steps 8a-8b. Note that the call to Str is broken up into 1) getting
* the property; 2) processing for toJSON, calling the replacer, and
* handling boxed Number/String/Boolean objects; 3) filtering out
* values which process to |undefined|, and 4) stringifying all values
* which pass the filter.
*/
const jsid &id = propertyList[i];
Value outputValue;
if (!obj->getGeneric(cx, id, &outputValue))
return false;
if (!PreprocessValue(cx, obj, id, &outputValue, scx))
return false;
if (IsFilteredValue(outputValue))
continue;
/* Output a comma unless this is the first member to write. */
if (wroteMember && !scx->sb.append(','))
return false;
wroteMember = true;
if (!WriteIndent(cx, scx, scx->depth))
return false;
JSString *s = IdToString(cx, id);
if (!s)
return false;
if (!Quote(cx, scx->sb, s) ||
!scx->sb.append(':') ||
!(scx->gap.empty() || scx->sb.append(' ')) ||
!Str(cx, outputValue, scx))
{
return false;
}
}
if (wroteMember && !WriteIndent(cx, scx, scx->depth - 1))
return false;
return scx->sb.append('}');
}
