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Bug 363767. Add AppendElements() API (that appends empty elements) to nsTArray. r=sicking,sr=darin

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git-svn-id: svn://10.0.0.236/trunk@217103 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
roc+%cs.cmu.edu 2006-12-18 01:17:23 +00:00
parent bb74327ee2
commit f50a7d874f
1 changed files with 16 additions and 6 deletions
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22
mozilla/xpcom/glue/nsTArray.h
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@ -519,16 +519,26 @@ class nsTArray : public nsTArray_base {
return AppendElements(&item, 1);
}
// Append new elements without copy-constructing. This is useful to avoid
// temporaries.
// @return A pointer to the newly appended elements, or null on OOM.
elem_type *AppendElements(size_type count) {
if (!EnsureCapacity(Length() + count, sizeof(elem_type)))
return nsnull;
elem_type *elems = Elements() + Length();
size_type i;
for (i = 0; i < count; ++i) {
elem_traits::Construct(elems + i);
}
IncrementLength(count);
return elems;
}
// Append a new element without copy-constructing. This is useful to avoid
// temporaries.
// @return A pointer to the newly appended element, or null on OOM.
elem_type *AppendElement() {
if (!EnsureCapacity(Length() + 1, sizeof(elem_type)))
return nsnull;
elem_type *elem = Elements() + Length();
elem_traits::Construct(elem);
IncrementLength(1);
return elem;
return AppendElements(1);
}
// This method removes a range of elements from this array.