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enhance raw_svector_ostream::write_impl to work with unbuffered streams,

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which may call write_impl on things that are not the usual buffer.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@96209 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-02-15 02:18:26 +00:00
parent efbdaa6463
commit 17f26b4fd2
1 changed files with 12 additions and 6 deletions
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18
lib/Support/raw_ostream.cpp
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@ -574,12 +574,18 @@ void raw_svector_ostream::resync() {
}
void raw_svector_ostream::write_impl(const char *Ptr, size_t Size) {
assert(Ptr == OS.end() && OS.size() + Size <= OS.capacity() &&
"Invalid write_impl() call!");
// We don't need to copy the bytes, just commit the bytes to the
// SmallVector.
OS.set_size(OS.size() + Size);
// If we're writing bytes from the end of the buffer into the smallvector, we
// don't need to copy the bytes, just commit the bytes because they are
// already in the right place.
if (Ptr == OS.end()) {
assert(OS.size() + Size <= OS.capacity() && "Invalid write_impl() call!");
OS.set_size(OS.size() + Size);
} else {
assert(GetNumBytesInBuffer() == 0 &&
"Should be writing from buffer if some bytes in it");
// Otherwise, do copy the bytes.
OS.append(Ptr, Ptr+Size);
}
// Grow the vector if necessary.
if (OS.capacity() - OS.size() < 64)