}

// Read reads the next len(p) bytes from the buffer or until the buffer
// is drained. The return value n is the number of bytes read. If the
// buffer has no data to return, err is [io.EOF] (unless len(p) is zero);
// otherwise it is nil.
func (b *Buffer) Read(p []byte) (n int, err error) {
	b.lastRead = opInvalid
	if b.empty() {
		// Buffer is empty, reset to recover space.
		b.Reset()
		if len(p) == 0 {

 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
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 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
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 * you may not use this file except in compliance with the License.
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 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
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 * in compliance with the License. You may obtain a copy of the License at
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 *
 * Unless required by applicable law or agreed to in writing, software distributed under the License
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 * you may not use this file except in compliance with the License.
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 * Unless required by applicable law or agreed to in writing, software
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 * you may not use this file except in compliance with the License.
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 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
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 * you may not use this file except in compliance with the License.
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 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
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 * you may not use this file except in compliance with the License.
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 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
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 * you may not use this file except in compliance with the License.
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 *
 * Unless required by applicable law or agreed to in writing, software
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 * you may not use this file except in compliance with the License.
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 *
 * Unless required by applicable law or agreed to in writing, software
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