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53 lines
1.8 KiB
Rust
53 lines
1.8 KiB
Rust
use super::{BufMut, Encode};
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use byteorder::{BigEndian, ByteOrder};
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pub struct Bind<'a> {
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/// The name of the destination portal (an empty string selects the unnamed portal).
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pub portal: &'a str,
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/// The name of the source prepared statement (an empty string selects the unnamed prepared statement).
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pub statement: &'a str,
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/// The parameter format codes. Each must presently be zero (text) or one (binary).
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///
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/// There can be zero to indicate that there are no parameters or that the parameters all use the
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/// default format (text); or one, in which case the specified format code is applied to all
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/// parameters; or it can equal the actual number of parameters.
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pub formats: &'a [i16],
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pub values_len: i16,
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pub values: &'a [u8],
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/// The result-column format codes. Each must presently be zero (text) or one (binary).
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///
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/// There can be zero to indicate that there are no result columns or that the
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/// result columns should all use the default format (text); or one, in which
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/// case the specified format code is applied to all result columns (if any);
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/// or it can equal the actual number of result columns of the query.
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pub result_formats: &'a [i16],
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}
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impl Encode for Bind<'_> {
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fn encode(&self, buf: &mut Vec<u8>) {
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buf.put_byte(b'B');
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let pos = buf.len();
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buf.put_int_32(0); // skip over len
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buf.put_str(self.portal);
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buf.put_str(self.statement);
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buf.put_array_int_16(&self.formats);
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buf.put_int_16(self.values_len);
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buf.put(self.values);
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buf.put_array_int_16(&self.result_formats);
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// Write-back the len to the beginning of this frame
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let len = buf.len() - pos;
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BigEndian::write_i32(&mut buf[pos..], len as i32);
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}
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}
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