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<pre class="has-background-white py-0 px-2">use std::{</pre>
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<pre class="has-background-white py-0 px-2"> fmt::{Display, Error},</pre>
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<pre class="has-background-white py-0 px-2"> io::{Read, Write},</pre>
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<pre class="has-background-white py-0 px-2">};</pre>
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<pre class="has-background-white py-0 px-2">use anyhow::Result;</pre>
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<pre class="has-background-white py-0 px-2">use crate::RwBuilder;</pre>
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<pre class="has-background-white py-0 px-2">/// Type returned by the `string` function on the `RwBuilder` trait.</pre>
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<pre class="has-background-white py-0 px-2">/// It is itself not an `RwBuilder` so can't be chained further.</pre>
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<pre class="has-background-white py-0 px-2">/// This is why we call it a sink.</pre>
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<pre class="has-background-white py-0 px-2">#[derive(Debug)]</pre>
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<pre class="has-background-white py-0 px-2">pub struct Builder<B></pre>
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<pre class="has-background-white py-0 px-2"> B: RwBuilder,</pre>
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<pre class="has-background-white py-0 px-2">{</pre>
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<pre class="has-background-white py-0 px-2"> /// The inner builder it wraps</pre>
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<pre class="has-background-white py-0 px-2">impl<B> Builder<B></pre>
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<pre class="has-background-white py-0 px-2"> B: RwBuilder,</pre>
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<pre class="has-background-white py-0 px-2"> /// Factory function to wrap an inner builder</pre>
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<pre class="has-background-white py-0 px-2"> #[must_use]</pre>
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<pre class="has-background-success-light py-0 px-2"> pub const fn new(builder: B) -> Self {</pre>
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<pre class="has-background-white py-0 px-2">}</pre>
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<pre class="has-background-white py-0 px-2">impl<B> Display for Builder<B></pre>
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<pre class="has-background-white py-0 px-2"> B: RwBuilder,</pre>
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<pre class="has-background-white py-0 px-2">{</pre>
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<pre class="has-background-success-light py-0 px-2"> fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {</pre>
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<pre class="has-background-white py-0 px-2"> /// The size with which the buffer is extended until the reader is empty</pre>
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<pre class="has-background-white py-0 px-2"> const BLOCK_SIZE: usize = 1024;</pre>
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<pre class="has-background-success-light py-0 px-2"> let mut reader = self.builder.reader().or(Err(Error))?;</pre>
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<pre class="has-background-success-light py-0 px-2"> let mut buffer = vec![0u8; BLOCK_SIZE];</pre>
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<pre class="has-background-success-light py-0 px-2"> let mut position: usize = 0;</pre>
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<pre class="has-background-success-light py-0 px-2"> while let Ok(bytes) = reader.read(&mut buffer[position..]) {</pre>
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<pre class="has-background-success-light py-0 px-2"> if bytes == BLOCK_SIZE {</pre>
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<pre class="has-background-success-light py-0 px-2"> position += BLOCK_SIZE;</pre>
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<pre class="has-background-success-light py-0 px-2"> buffer.extend_from_slice(&[0u8; BLOCK_SIZE]);</pre>
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<pre class="has-background-success-light py-0 px-2"> } else {</pre>
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<pre class="has-background-success-light py-0 px-2"> buffer.truncate(position + bytes);</pre>
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<pre class="has-background-success-light py-0 px-2"> break;</pre>
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<pre class="has-background-white py-0 px-2"> }</pre>
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<pre class="has-background-success-light py-0 px-2"> write!(f, "{}", String::from_utf8(buffer).or(Err(Error))?)</pre>
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<pre class="has-background-white py-0 px-2">}</pre>
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<pre class="has-background-white py-0 px-2">/// Creates a writer and writes the string to it</pre>
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<pre class="has-background-white py-0 px-2">pub trait AdhocWriter {</pre>
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<pre class="has-background-white py-0 px-2"> /// Write a string to a built writer</pre>
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<pre class="has-background-white py-0 px-2"> /// # Errors</pre>
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<pre class="has-background-white py-0 px-2"> /// If either the writer creation or the write operation fails the error is</pre>
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<pre class="has-background-white py-0 px-2"> /// propagated.</pre>
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<pre class="has-background-white py-0 px-2"> fn write_string(&self, text: &str) -> Result<()>;</pre>
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<pre class="has-background-white py-0 px-2">}</pre>
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<pre class="has-background-white py-0 px-2">impl<B> AdhocWriter for Builder<B></pre>
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<pre class="has-background-white py-0 px-2">where</pre>
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<pre class="has-background-white py-0 px-2"> B: RwBuilder,</pre>
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<pre class="has-background-white py-0 px-2">{</pre>
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<pre class="has-background-success-light py-0 px-2"> fn write_string(&self, text: &str) -> Result<()> {</pre>
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<pre class="has-background-success-light py-0 px-2"> let mut writer = self.builder.writer()?;</pre>
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<pre class="has-background-success-light py-0 px-2"> let byte_count = writer.write(text.as_bytes())?;</pre>
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<pre class="has-background-success-light py-0 px-2"> assert_eq!(byte_count, text.len());</pre>
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<pre class="has-background-success-light py-0 px-2"> Ok(writer.flush()?)</pre>
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<pre class="has-background-success-light py-0 px-2"> }</pre>
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<pre class="has-background-white py-0 px-2">}</pre>
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