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use core::mem::size_of;
use super::new_writer::NewWriter;
use super::z_helpers::z_count;
use crate::postgres::types::int_types::{Int4, int32};
// PORT NOTE: Zig `deinit` is a no-op (`_ = this;`), so all three slice fields are
// borrowed for the lifetime of the write. Most protocol message structs avoid
// lifetime params, but none of Box / &'static / raw fit a transient borrow-only
// message builder, so this struct carries an explicit `'a`.
#[derive(Default)]
pub struct Parse<'a> {
pub name: &'a [u8],
pub query: &'a [u8],
pub params: &'a [Int4],
}
// Zig `pub fn deinit(this: *Parse) void { _ = this; }` — no-op, so no `Drop` impl.
impl<'a> Parse<'a> {
pub fn write_internal<Context: super::new_writer::WriterContext>(
&self,
writer: &mut NewWriter<Context>,
) -> Result<(), bun_core::Error> {
// TODO(port): narrow error set
let parameters = self.params;
if parameters.len() > u16::MAX as usize {
return Err(bun_core::err!("TooManyParameters"));
}
let count: usize = size_of::<u32>()
+ size_of::<u16>()
+ std::mem::size_of_val(parameters)
+ z_count(self.name).max(1)
+ z_count(self.query).max(1);
// Zig: `[_]u8{'P'} ++ toBytes(Int32(count))` — 1 tag byte + 4 length bytes.
// `std.mem.toBytes` is native-endian raw bytes of the value; `Int32(count)`
// is the PostgresTypes big-endian wrapper, so the on-wire layout matches.
let mut header = [0u8; 1 + size_of::<u32>()];
header[0] = b'P';
header[1..].copy_from_slice(&int32(count));
writer.write(&header)?;
writer.string(self.name)?;
writer.string(self.query)?;
writer.short(parameters.len())?;
for parameter in parameters {
writer.int4(*parameter)?;
}
Ok(())
}
// Zig `WriteWrap(@This(), ...)` — see src/sql/postgres/protocol/WriteWrap.rs
pub fn write<Context: super::new_writer::WriterContext>(
&self,
writer: &mut NewWriter<Context>,
) -> Result<(), bun_core::Error> {
self.write_internal(writer)
}
}
// ported from: src/sql/postgres/protocol/Parse.zig