/// Use it like: outs() << "foo" << "bar";
raw_ostream &llvm::outs() {
// Set buffer settings to model stdout behavior.
- // Delete the file descriptor when the program exists, forcing error
+ // Delete the file descriptor when the program exits, forcing error
// detection. If you don't want this behavior, don't use outs().
static raw_fd_ostream S(STDOUT_FILENO, true);
return S;
// and we only need to set the vector size when the data is flushed.
raw_svector_ostream::raw_svector_ostream(SmallVectorImpl<char> &O) : OS(O) {
- init();
-}
-
-void raw_svector_ostream::init() {
// Set up the initial external buffer. We make sure that the buffer has at
// least 128 bytes free; raw_ostream itself only requires 64, but we want to
// make sure that we don't grow the buffer unnecessarily on destruction (when
}
void raw_svector_ostream::write_impl(const char *Ptr, size_t 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);
+ // Grow the buffer to include the scratch area without copying.
+ size_t NewSize = OS.size() + Size;
+ assert(NewSize <= OS.capacity() && "Invalid write_impl() call!");
+ OS.set_size(NewSize);
} else {
- assert(GetNumBytesInBuffer() == 0 &&
- "Should be writing from buffer if some bytes in it");
- // Otherwise, do copy the bytes.
- OS.append(Ptr, Ptr+Size);
+ assert(!GetNumBytesInBuffer());
+ OS.append(Ptr, Ptr + Size);
}
- // Grow the vector if necessary.
- if (OS.capacity() - OS.size() < 64)
- OS.reserve(OS.capacity() * 2);
-
- // Update the buffer position.
+ OS.reserve(OS.size() + 64);
SetBuffer(OS.end(), OS.capacity() - OS.size());
}