pub use nom::Err as ParserError;
use crate::{
flags::*,
types::*,
value::*,
};
use nom::{
self,
bytes::streaming::take,
combinator::{all_consuming, complete, flat_map, map, map_opt, map_parser, map_res},
error::ErrorKind,
multi::fold_many0,
number::streaming::{be_i8, be_u8, be_i16, be_u16, be_i32, be_u32, be_i64, be_u64, be_f32, be_f64},
sequence::pair,
};
pub type ParserResult<'a, T> = Result<(&'a [u8], T), ParserError<(&'a [u8], ErrorKind)>>;
pub fn parse_raw_value(amqp_type: AMQPType) -> impl Fn(&[u8]) -> ParserResult<'_, AMQPValue> {
move |i| match amqp_type {
AMQPType::Boolean => map(parse_boolean, AMQPValue::Boolean)(i),
AMQPType::ShortShortInt => map(parse_short_short_int, AMQPValue::ShortShortInt)(i),
AMQPType::ShortShortUInt => map(parse_short_short_uint, AMQPValue::ShortShortUInt)(i),
AMQPType::ShortInt => map(parse_short_int, AMQPValue::ShortInt)(i),
AMQPType::ShortUInt => map(parse_short_uint, AMQPValue::ShortUInt)(i),
AMQPType::LongInt => map(parse_long_int, AMQPValue::LongInt)(i),
AMQPType::LongUInt => map(parse_long_uint, AMQPValue::LongUInt)(i),
AMQPType::LongLongInt => map(parse_long_long_int, AMQPValue::LongLongInt)(i),
AMQPType::LongLongUInt => map(parse_long_long_int, AMQPValue::LongLongInt)(i),
AMQPType::Float => map(parse_float, AMQPValue::Float)(i),
AMQPType::Double => map(parse_double, AMQPValue::Double)(i),
AMQPType::DecimalValue => map(parse_decimal_value, AMQPValue::DecimalValue)(i),
AMQPType::ShortString => map(parse_short_string, AMQPValue::LongString)(i),
AMQPType::LongString => map(parse_long_string, AMQPValue::LongString)(i),
AMQPType::FieldArray => map(parse_field_array, AMQPValue::FieldArray)(i),
AMQPType::Timestamp => map(parse_timestamp, AMQPValue::Timestamp)(i),
AMQPType::FieldTable => map(parse_field_table, AMQPValue::FieldTable)(i),
AMQPType::ByteArray => map(parse_byte_array, AMQPValue::ByteArray)(i),
AMQPType::Void => Ok((i, AMQPValue::Void)),
}
}
pub fn parse_value(i: &[u8]) -> ParserResult<'_, AMQPValue> {
flat_map(parse_type, parse_raw_value)(i)
}
pub fn parse_type(i: &[u8]) -> ParserResult<'_, AMQPType> {
map_opt(be_u8, |t| AMQPType::from_id(t as char))(i)
}
pub fn parse_id(i: &[u8]) -> ParserResult<'_, ShortUInt> {
parse_short_uint(i)
}
pub fn parse_boolean(i: &[u8]) -> ParserResult<'_, Boolean> {
map(be_u8, |b| b != 0)(i)
}
pub fn parse_short_short_int(i: &[u8]) -> ParserResult<'_, ShortShortInt> {
be_i8(i)
}
pub fn parse_short_short_uint(i: &[u8]) -> ParserResult<'_, ShortShortUInt> {
be_u8(i)
}
pub fn parse_short_int(i: &[u8]) -> ParserResult<'_, ShortInt> {
be_i16(i)
}
pub fn parse_short_uint(i: &[u8]) -> ParserResult<'_, ShortUInt> {
be_u16(i)
}
pub fn parse_long_int(i: &[u8]) -> ParserResult<'_, LongInt> {
be_i32(i)
}
pub fn parse_long_uint(i: &[u8]) -> ParserResult<'_, LongUInt> {
be_u32(i)
}
pub fn parse_long_long_int(i: &[u8]) -> ParserResult<'_, LongLongInt> {
be_i64(i)
}
pub fn parse_long_long_uint(i: &[u8]) -> ParserResult<'_, LongLongUInt> {
be_u64(i)
}
pub fn parse_float(i: &[u8]) -> ParserResult<'_, Float> {
be_f32(i)
}
pub fn parse_double(i: &[u8]) -> ParserResult<'_, Double> {
be_f64(i)
}
pub fn parse_decimal_value(i: &[u8]) -> ParserResult<'_, DecimalValue> {
flat_map(parse_short_short_uint, |scale| map(parse_long_uint, move |value| DecimalValue { scale, value, }))(i)
}
pub fn parse_short_string(i: &[u8]) -> ParserResult<'_, ShortString> {
map(map_res(flat_map(parse_short_short_uint, take), std::str::from_utf8), ToString::to_string)(i)
}
pub fn parse_long_string(i: &[u8]) -> ParserResult<'_, LongString> {
map(map_res(flat_map(parse_long_uint, take), std::str::from_utf8), ToString::to_string)(i)
}
pub fn parse_field_array(i: &[u8]) -> ParserResult<'_, FieldArray> {
map_parser(flat_map(parse_long_uint, take), all_consuming(fold_many0(complete(parse_value), FieldArray::new(), |mut acc, elem| {
acc.push(elem);
acc
})))(i)
}
pub fn parse_timestamp(i: &[u8]) -> ParserResult<'_, Timestamp> {
parse_long_long_uint(i)
}
pub fn parse_field_table(i: &[u8]) -> ParserResult<'_, FieldTable> {
map_parser(flat_map(parse_long_uint, take), all_consuming(fold_many0(complete(pair(parse_short_string, parse_value)), FieldTable::new(), |mut acc, (key, value)| {
acc.insert(key, value);
acc
})))(i)
}
pub fn parse_byte_array(i: &[u8]) -> ParserResult<'_, ByteArray> {
map(flat_map(parse_long_uint, take), |a| a.to_vec())(i)
}
pub fn parse_flags<'a, 'b>(i: &'a [u8], names: &'b [&'b str]) -> ParserResult<'a, AMQPFlags> {
map(take((names.len() + 7) / 8), |b| AMQPFlags::from_bytes(names, b))(i)
}
#[cfg(test)]
mod test {
use super::*;
const EMPTY: &'static [u8] = b"";
#[test]
fn test_parse_value() {
assert_eq!(parse_value(&[84, 42, 42, 42, 42, 42, 42, 42, 42]), Ok((EMPTY, AMQPValue::Timestamp(3038287259199220266))));
assert_eq!(parse_value(&[83, 0, 0, 0, 4, 116, 101, 115, 116]), Ok((EMPTY, AMQPValue::LongString("test".to_string()))));
}
#[test]
fn test_parse_raw_value() {
assert_eq!(parse_raw_value(AMQPType::Timestamp) (&[42, 42, 42, 42, 42, 42, 42, 42]), Ok((EMPTY, AMQPValue::Timestamp(3038287259199220266))));
assert_eq!(parse_raw_value(AMQPType::LongString) (&[0, 0, 0, 4, 116, 101, 115, 116]), Ok((EMPTY, AMQPValue::LongString("test".to_string()))));
assert_eq!(parse_raw_value(AMQPType::LongLongUInt)(&[42, 42, 42, 42, 42, 42, 42, 42]), Ok((EMPTY, AMQPValue::LongLongInt(3038287259199220266))));
assert_eq!(parse_raw_value(AMQPType::ShortString) (&[4, 116, 101, 115, 116]), Ok((EMPTY, AMQPValue::LongString("test".to_string()))));
}
#[test]
fn test_parse_type() {
assert_eq!(parse_type(&[116]), Ok((EMPTY, AMQPType::Boolean)));
assert_eq!(parse_type(&[102]), Ok((EMPTY, AMQPType::Float)));
}
#[test]
fn test_parse_id() {
assert_eq!(parse_id(&[0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_id(&[255, 255]), Ok((EMPTY, 65535)));
}
#[test]
fn test_parse_boolean() {
assert_eq!(parse_boolean(&[0]), Ok((EMPTY, false)));
assert_eq!(parse_boolean(&[1]), Ok((EMPTY, true)));
}
#[test]
fn test_parse_short_short_int() {
assert_eq!(parse_short_short_int(&[0]), Ok((EMPTY, 0)));
assert_eq!(parse_short_short_int(&[255]), Ok((EMPTY, -1)));
}
#[test]
fn test_parse_short_short_uint() {
assert_eq!(parse_short_short_uint(&[0]), Ok((EMPTY, 0)));
assert_eq!(parse_short_short_uint(&[255]), Ok((EMPTY, 255)));
}
#[test]
fn test_parse_short_int() {
assert_eq!(parse_short_int(&[0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_short_int(&[255, 255]), Ok((EMPTY, -1)));
}
#[test]
fn test_parse_short_uint() {
assert_eq!(parse_short_uint(&[0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_short_uint(&[255, 255]), Ok((EMPTY, 65535)));
}
#[test]
fn test_parse_long_int() {
assert_eq!(parse_long_int(&[0, 0, 0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_long_int(&[255, 255, 255, 255]), Ok((EMPTY, -1)));
}
#[test]
fn test_parse_long_uint() {
assert_eq!(parse_long_uint(&[0, 0, 0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_long_uint(&[255, 255, 255, 255]), Ok((EMPTY, 4294967295)));
}
#[test]
fn test_parse_long_long_int() {
assert_eq!(parse_long_long_int(&[0, 0, 0, 0, 0, 0, 0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_long_long_int(&[255, 255, 255, 255, 255, 255, 255, 255]), Ok((EMPTY, -1)));
}
#[test]
fn test_parse_long_long_uint() {
assert_eq!(parse_long_long_uint(&[0, 0, 0, 0, 0, 0, 0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_long_long_uint(&[255, 255, 255, 255, 255, 255, 255, 255]), Ok((EMPTY, 18446744073709551615)));
}
#[test]
fn test_parse_float() {
assert_eq!(parse_float(&[0, 0, 0, 0]), Ok((EMPTY, 0.)));
assert_eq!(parse_float(&[66, 41, 174, 20]), Ok((EMPTY, 42.42)));
}
#[test]
fn test_parse_double() {
assert_eq!(parse_double(&[0, 0, 0, 0, 0, 0, 0, 0]), Ok((EMPTY, 0.)));
assert_eq!(parse_double(&[64, 69, 53, 194, 143, 92, 40, 246]), Ok((EMPTY, 42.42)));
}
#[test]
fn test_parse_decimal_value() {
assert_eq!(parse_decimal_value(&[0, 0, 0, 0, 0]), Ok((EMPTY, DecimalValue { scale: 0, value: 0 })));
assert_eq!(parse_decimal_value(&[255, 255, 255, 255, 255]), Ok((EMPTY, DecimalValue { scale: 255, value: 4294967295 })));
}
#[test]
fn test_parse_short_string() {
assert_eq!(parse_short_string(&[0]), Ok((EMPTY, ShortString::new())));
assert_eq!(parse_short_string(&[4, 116, 101, 115, 116]), Ok((EMPTY, "test".to_string())));
}
#[test]
fn test_parse_long_string() {
assert_eq!(parse_long_string(&[0, 0, 0, 0]), Ok((EMPTY, LongString::new())));
assert_eq!(parse_long_string(&[0, 0, 0, 4, 116, 101, 115, 116]), Ok((EMPTY, "test".to_string())));
}
#[test]
fn test_parse_field_array() {
assert_eq!(parse_field_array(&[0, 0, 0, 0]), Ok((EMPTY, FieldArray::new())));
assert_eq!(parse_field_array(&[0, 0, 0, 10, 83, 0, 0, 0, 4, 116, 101, 115, 116, 86]), Ok((EMPTY, vec![AMQPValue::LongString("test".to_string()), AMQPValue::Void])));
}
#[test]
fn test_parse_timestamp() {
assert_eq!(parse_timestamp(&[0, 0, 0, 0, 0, 0, 0, 0]), Ok((EMPTY, 0)));
assert_eq!(parse_timestamp(&[255, 255, 255, 255, 255, 255, 255, 255]), Ok((EMPTY, 18446744073709551615)));
}
#[test]
fn test_parse_field_table() {
let mut table = FieldTable::new();
table.insert("test".to_string(), AMQPValue::LongString("test".to_string()));
table.insert("tt".to_string(), AMQPValue::Void);
assert_eq!(parse_field_table(&[0, 0, 0, 0]), Ok((EMPTY, FieldTable::new())));
assert_eq!(parse_field_table(&[0, 0, 0, 18, 4, 116, 101, 115, 116, 83, 0, 0, 0, 4, 116, 101, 115, 116, 2, 116, 116, 86]), Ok((EMPTY, table)));
}
#[test]
fn test_parse_byte_array() {
assert_eq!(parse_byte_array(&[0, 0, 0, 0]), Ok((EMPTY, ByteArray::new())));
assert_eq!(parse_byte_array(&[0, 0, 0, 4, 42, 1, 2, 3]), Ok((EMPTY, vec![42, 1, 2, 3])));
}
#[test]
fn test_parse_flags() {
let mut flags = AMQPFlags::default();
let mut names = Vec::new();
names.push("a"); flags.add_flag("a".to_string(), true);
names.push("b"); flags.add_flag("b".to_string(), false);
names.push("c"); flags.add_flag("c".to_string(), true);
names.push("d"); flags.add_flag("d".to_string(), true);
assert_eq!(parse_flags(&[0b00001101], &names), Ok((EMPTY, flags.clone())));
names.push("e"); flags.add_flag("e".to_string(), true);
names.push("f"); flags.add_flag("f".to_string(), false);
names.push("g"); flags.add_flag("g".to_string(), true);
names.push("h"); flags.add_flag("h".to_string(), true);
names.push("i"); flags.add_flag("i".to_string(), false);
names.push("j"); flags.add_flag("j".to_string(), true);
assert_eq!(parse_flags(&[0b11011101, 0b00000010], &names), Ok((EMPTY, flags)));
}
}