nsresult
nsSceneTracker::ParseSceneNumber(nsString sceneNumber,
PRUint32* ioNumberLength,
PRUint32* outNumber) {
NS_ENSURE_ARG_POINTER(ioNumberLength);
NS_ENSURE_ARG_POINTER(outNumber);
NS_ENSURE_ARG_MIN(*ioNumberLength, 1);
NS_LossyConvertUTF16toASCII asciiSceneNumber(sceneNumber);
const char* cursor = asciiSceneNumber.get();
PRUint32 scanned = 0;
PRUint32 number;
int read = 0;
// %n is not counted in the return value, but we can detect it
// if we reset 'read' before each call, because read will not
// be set if it fails to parse a period after the number
while (sscanf(cursor, "%u.%n", &number, &read) > 0) {
outNumber[scanned++] = number;
if (read == 0 || scanned == *ioNumberLength)
break;
cursor += read;
read = 0;
}
*ioNumberLength = scanned;
if (scanned == 0)
return NS_ERROR_FAILURE;
else
return NS_OK;
}
nsresult
nsSceneTracker::SceneNumberBetweenScenes (
nsIDOMHTMLParagraphElement* aLeftScene,
nsIDOMHTMLParagraphElement* aRightScene,
PRUint32* ioNumberLength,
PRUint32* outNumber,
PRBool* outPropagateChanges) {
NS_ENSURE_ARG_POINTER(ioNumberLength);
NS_ENSURE_ARG_POINTER(outNumber);
NS_ENSURE_ARG_POINTER(outPropagateChanges);
NS_ENSURE_ARG_MIN(*ioNumberLength, 1);
nsresult rv;
nsAutoString leftNumberStr;
PRUint32 leftNumber[DEFAULT_MAX_SCENE_DEPTH];
PRUint32 leftNumberLength = DEFAULT_MAX_SCENE_DEPTH;
nsAutoString rightNumberStr;
PRUint32 rightNumber[DEFAULT_MAX_SCENE_DEPTH];
PRUint32 rightNumberLength = DEFAULT_MAX_SCENE_DEPTH;
NS_NAMED_LITERAL_STRING(kNumberAttr, "scenenumber");
if (aLeftScene) {
rv = aLeftScene->GetAttribute(kNumberAttr, leftNumberStr);
if (NS_FAILED(rv))
return rv;
rv = ParseSceneNumber(leftNumberStr, &leftNumberLength, leftNumber);
if (NS_FAILED(rv))
return rv;
}
// Skip unlocked scenes, since we are allowed to renumber them anyway
nsCOMPtr<nsIDOMHTMLParagraphElement> nextScene(aRightScene);
while (nextScene && ! SceneHasLockedNumber(nextScene)) {
nsCOMPtr<nsIDOMHTMLParagraphElement> tmp(nextScene);
rv = GetNextNumberedScene(tmp, getter_AddRefs(nextScene));
if (NS_FAILED(rv))
return rv;
}
if (nextScene) {
rv = nextScene->GetAttribute(kNumberAttr, rightNumberStr);
if (NS_FAILED(rv))
return rv;
rv = ParseSceneNumber(rightNumberStr, &rightNumberLength, rightNumber);
if (NS_FAILED(rv))
return rv;
}
rv = mNumberSvc->NumberBetweenNumbers(
aLeftScene ? leftNumber : nsnull, leftNumberLength,
nextScene ? rightNumber : nsnull, rightNumberLength,
outNumber, ioNumberLength, outPropagateChanges);
return rv;
}
NS_IMETHODIMP
nsCommandLine::GetArgument(int32_t aIndex, nsAString& aResult)
{
NS_ENSURE_ARG_MIN(aIndex, 0);
NS_ENSURE_ARG_MAX(aIndex, int32_t(mArgs.Length() - 1));
aResult = mArgs[aIndex];
return NS_OK;
}
NS_IMETHODIMP
nsCommandLine::RemoveArguments(int32_t aStart, int32_t aEnd)
{
NS_ENSURE_ARG_MIN(aStart, 0);
NS_ENSURE_ARG_MAX(uint32_t(aEnd) + 1, mArgs.Length());
for (int32_t i = aEnd; i >= aStart; --i) {
mArgs.RemoveElementAt(i);
}
return NS_OK;
}
