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-rw-r--r--src/coded_input_stream.rs1004
1 files changed, 1004 insertions, 0 deletions
diff --git a/src/coded_input_stream.rs b/src/coded_input_stream.rs
new file mode 100644
index 0000000..52a13a6
--- /dev/null
+++ b/src/coded_input_stream.rs
@@ -0,0 +1,1004 @@
+#![doc(hidden)]
+
+//! `CodedInputStream` and `CodedOutputStream` implementations
+
+use std::io;
+use std::io::BufRead;
+use std::io::Read;
+use std::mem;
+use std::slice;
+
+#[cfg(feature = "bytes")]
+use crate::chars::Chars;
+#[cfg(feature = "bytes")]
+use bytes::Bytes;
+
+use crate::buf_read_iter::BufReadIter;
+use crate::enums::ProtobufEnum;
+use crate::error::ProtobufError;
+use crate::error::ProtobufResult;
+use crate::error::WireError;
+use crate::message::Message;
+use crate::unknown::UnknownValue;
+use crate::wire_format;
+use crate::zigzag::decode_zig_zag_32;
+use crate::zigzag::decode_zig_zag_64;
+
+/// Default recursion level limit. 100 is the default value of C++'s implementation.
+const DEFAULT_RECURSION_LIMIT: u32 = 100;
+
+/// Max allocated vec when reading length-delimited from unknown input stream
+pub(crate) const READ_RAW_BYTES_MAX_ALLOC: usize = 10_000_000;
+
+/// Buffered read with handy utilities.
+pub struct CodedInputStream<'a> {
+ source: BufReadIter<'a>,
+ recursion_level: u32,
+ recursion_limit: u32,
+}
+
+impl<'a> CodedInputStream<'a> {
+ /// Wrap a `Read`.
+ ///
+ /// Note resulting `CodedInputStream` is buffered even if `Read` is not.
+ pub fn new(read: &'a mut dyn Read) -> CodedInputStream<'a> {
+ CodedInputStream::from_buf_read_iter(BufReadIter::from_read(read))
+ }
+
+ /// Create from `BufRead`.
+ ///
+ /// `CodedInputStream` will utilize `BufRead` buffer.
+ pub fn from_buffered_reader(buf_read: &'a mut dyn BufRead) -> CodedInputStream<'a> {
+ CodedInputStream::from_buf_read_iter(BufReadIter::from_buf_read(buf_read))
+ }
+
+ /// Read from byte slice
+ pub fn from_bytes(bytes: &'a [u8]) -> CodedInputStream<'a> {
+ CodedInputStream::from_buf_read_iter(BufReadIter::from_byte_slice(bytes))
+ }
+
+ /// Read from `Bytes`.
+ ///
+ /// `CodedInputStream` operations like
+ /// [`read_carllerche_bytes`](crate::CodedInputStream::read_carllerche_bytes)
+ /// will return a shared copy of this bytes object.
+ #[cfg(feature = "bytes")]
+ pub fn from_carllerche_bytes(bytes: &'a Bytes) -> CodedInputStream<'a> {
+ CodedInputStream::from_buf_read_iter(BufReadIter::from_bytes(bytes))
+ }
+
+ fn from_buf_read_iter(source: BufReadIter<'a>) -> CodedInputStream<'a> {
+ CodedInputStream {
+ source: source,
+ recursion_level: 0,
+ recursion_limit: DEFAULT_RECURSION_LIMIT,
+ }
+ }
+
+ /// Set the recursion limit.
+ pub fn set_recursion_limit(&mut self, limit: u32) {
+ self.recursion_limit = limit;
+ }
+
+ #[inline]
+ pub(crate) fn incr_recursion(&mut self) -> ProtobufResult<()> {
+ if self.recursion_level >= self.recursion_limit {
+ return Err(ProtobufError::WireError(WireError::OverRecursionLimit));
+ }
+ self.recursion_level += 1;
+ Ok(())
+ }
+
+ #[inline]
+ pub(crate) fn decr_recursion(&mut self) {
+ self.recursion_level -= 1;
+ }
+
+ /// How many bytes processed
+ pub fn pos(&self) -> u64 {
+ self.source.pos()
+ }
+
+ /// How many bytes until current limit
+ pub fn bytes_until_limit(&self) -> u64 {
+ self.source.bytes_until_limit()
+ }
+
+ /// Read bytes into given `buf`.
+ ///
+ /// Return `0` on EOF.
+ // TODO: overload with `Read::read`
+ pub fn read(&mut self, buf: &mut [u8]) -> ProtobufResult<()> {
+ self.source.read_exact(buf)?;
+ Ok(())
+ }
+
+ /// Read exact number of bytes as `Bytes` object.
+ ///
+ /// This operation returns a shared view if `CodedInputStream` is
+ /// constructed with `Bytes` parameter.
+ #[cfg(feature = "bytes")]
+ fn read_raw_callerche_bytes(&mut self, count: usize) -> ProtobufResult<Bytes> {
+ self.source.read_exact_bytes(count)
+ }
+
+ /// Read one byte
+ #[inline(always)]
+ pub fn read_raw_byte(&mut self) -> ProtobufResult<u8> {
+ self.source.read_byte()
+ }
+
+ /// Push new limit, return previous limit.
+ pub fn push_limit(&mut self, limit: u64) -> ProtobufResult<u64> {
+ self.source.push_limit(limit)
+ }
+
+ /// Restore previous limit.
+ pub fn pop_limit(&mut self, old_limit: u64) {
+ self.source.pop_limit(old_limit);
+ }
+
+ /// Are we at EOF?
+ #[inline(always)]
+ pub fn eof(&mut self) -> ProtobufResult<bool> {
+ self.source.eof()
+ }
+
+ /// Check we are at EOF.
+ ///
+ /// Return error if we are not at EOF.
+ pub fn check_eof(&mut self) -> ProtobufResult<()> {
+ let eof = self.eof()?;
+ if !eof {
+ return Err(ProtobufError::WireError(WireError::UnexpectedEof));
+ }
+ Ok(())
+ }
+
+ fn read_raw_varint64_slow(&mut self) -> ProtobufResult<u64> {
+ let mut r: u64 = 0;
+ let mut i = 0;
+ loop {
+ if i == 10 {
+ return Err(ProtobufError::WireError(WireError::IncorrectVarint));
+ }
+ let b = self.read_raw_byte()?;
+ // TODO: may overflow if i == 9
+ r = r | (((b & 0x7f) as u64) << (i * 7));
+ i += 1;
+ if b < 0x80 {
+ return Ok(r);
+ }
+ }
+ }
+
+ /// Read varint
+ #[inline(always)]
+ pub fn read_raw_varint64(&mut self) -> ProtobufResult<u64> {
+ 'slow: loop {
+ let ret;
+ let consume;
+
+ loop {
+ let rem = self.source.remaining_in_buf();
+
+ if rem.len() >= 1 {
+ // most varints are in practice fit in 1 byte
+ if rem[0] < 0x80 {
+ ret = rem[0] as u64;
+ consume = 1;
+ } else {
+ // handle case of two bytes too
+ if rem.len() >= 2 && rem[1] < 0x80 {
+ ret = (rem[0] & 0x7f) as u64 | (rem[1] as u64) << 7;
+ consume = 2;
+ } else if rem.len() >= 10 {
+ // Read from array when buf at at least 10 bytes,
+ // max len for varint.
+ let mut r: u64 = 0;
+ let mut i: usize = 0;
+ {
+ let rem = rem;
+ loop {
+ if i == 10 {
+ return Err(ProtobufError::WireError(
+ WireError::IncorrectVarint,
+ ));
+ }
+
+ let b = if true {
+ // skip range check
+ unsafe { *rem.get_unchecked(i) }
+ } else {
+ rem[i]
+ };
+
+ // TODO: may overflow if i == 9
+ r = r | (((b & 0x7f) as u64) << (i * 7));
+ i += 1;
+ if b < 0x80 {
+ break;
+ }
+ }
+ }
+ consume = i;
+ ret = r;
+ } else {
+ break 'slow;
+ }
+ }
+ } else {
+ break 'slow;
+ }
+ break;
+ }
+
+ self.source.consume(consume);
+ return Ok(ret);
+ }
+
+ self.read_raw_varint64_slow()
+ }
+
+ /// Read varint
+ #[inline(always)]
+ pub fn read_raw_varint32(&mut self) -> ProtobufResult<u32> {
+ self.read_raw_varint64().map(|v| v as u32)
+ }
+
+ /// Read little-endian 32-bit integer
+ pub fn read_raw_little_endian32(&mut self) -> ProtobufResult<u32> {
+ let mut r = 0u32;
+ let bytes: &mut [u8] = unsafe {
+ let p: *mut u8 = mem::transmute(&mut r);
+ slice::from_raw_parts_mut(p, mem::size_of::<u32>())
+ };
+ self.read(bytes)?;
+ Ok(r.to_le())
+ }
+
+ /// Read little-endian 64-bit integer
+ pub fn read_raw_little_endian64(&mut self) -> ProtobufResult<u64> {
+ let mut r = 0u64;
+ let bytes: &mut [u8] = unsafe {
+ let p: *mut u8 = mem::transmute(&mut r);
+ slice::from_raw_parts_mut(p, mem::size_of::<u64>())
+ };
+ self.read(bytes)?;
+ Ok(r.to_le())
+ }
+
+ /// Read tag
+ #[inline]
+ pub fn read_tag(&mut self) -> ProtobufResult<wire_format::Tag> {
+ let v = self.read_raw_varint32()?;
+ match wire_format::Tag::new(v) {
+ Some(tag) => Ok(tag),
+ None => Err(ProtobufError::WireError(WireError::IncorrectTag(v))),
+ }
+ }
+
+ /// Read tag, return it is pair (field number, wire type)
+ #[inline]
+ pub fn read_tag_unpack(&mut self) -> ProtobufResult<(u32, wire_format::WireType)> {
+ self.read_tag().map(|t| t.unpack())
+ }
+
+ /// Read `double`
+ pub fn read_double(&mut self) -> ProtobufResult<f64> {
+ let bits = self.read_raw_little_endian64()?;
+ unsafe { Ok(mem::transmute::<u64, f64>(bits)) }
+ }
+
+ /// Read `float`
+ pub fn read_float(&mut self) -> ProtobufResult<f32> {
+ let bits = self.read_raw_little_endian32()?;
+ unsafe { Ok(mem::transmute::<u32, f32>(bits)) }
+ }
+
+ /// Read `int64`
+ pub fn read_int64(&mut self) -> ProtobufResult<i64> {
+ self.read_raw_varint64().map(|v| v as i64)
+ }
+
+ /// Read `int32`
+ pub fn read_int32(&mut self) -> ProtobufResult<i32> {
+ self.read_raw_varint32().map(|v| v as i32)
+ }
+
+ /// Read `uint64`
+ pub fn read_uint64(&mut self) -> ProtobufResult<u64> {
+ self.read_raw_varint64()
+ }
+
+ /// Read `uint32`
+ pub fn read_uint32(&mut self) -> ProtobufResult<u32> {
+ self.read_raw_varint32()
+ }
+
+ /// Read `sint64`
+ pub fn read_sint64(&mut self) -> ProtobufResult<i64> {
+ self.read_uint64().map(decode_zig_zag_64)
+ }
+
+ /// Read `sint32`
+ pub fn read_sint32(&mut self) -> ProtobufResult<i32> {
+ self.read_uint32().map(decode_zig_zag_32)
+ }
+
+ /// Read `fixed64`
+ pub fn read_fixed64(&mut self) -> ProtobufResult<u64> {
+ self.read_raw_little_endian64()
+ }
+
+ /// Read `fixed32`
+ pub fn read_fixed32(&mut self) -> ProtobufResult<u32> {
+ self.read_raw_little_endian32()
+ }
+
+ /// Read `sfixed64`
+ pub fn read_sfixed64(&mut self) -> ProtobufResult<i64> {
+ self.read_raw_little_endian64().map(|v| v as i64)
+ }
+
+ /// Read `sfixed32`
+ pub fn read_sfixed32(&mut self) -> ProtobufResult<i32> {
+ self.read_raw_little_endian32().map(|v| v as i32)
+ }
+
+ /// Read `bool`
+ pub fn read_bool(&mut self) -> ProtobufResult<bool> {
+ self.read_raw_varint32().map(|v| v != 0)
+ }
+
+ /// Read `enum` as `ProtobufEnum`
+ pub fn read_enum<E: ProtobufEnum>(&mut self) -> ProtobufResult<E> {
+ let i = self.read_int32()?;
+ match ProtobufEnum::from_i32(i) {
+ Some(e) => Ok(e),
+ None => Err(ProtobufError::WireError(WireError::InvalidEnumValue(i))),
+ }
+ }
+
+ /// Read `repeated` packed `double`
+ pub fn read_repeated_packed_double_into(
+ &mut self,
+ target: &mut Vec<f64>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ target.reserve((len / 4) as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_double()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read `repeated` packed `float`
+ pub fn read_repeated_packed_float_into(&mut self, target: &mut Vec<f32>) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ target.reserve((len / 4) as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_float()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read `repeated` packed `int64`
+ pub fn read_repeated_packed_int64_into(&mut self, target: &mut Vec<i64>) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len as u64)?;
+ while !self.eof()? {
+ target.push(self.read_int64()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `int32`
+ pub fn read_repeated_packed_int32_into(&mut self, target: &mut Vec<i32>) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_int32()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `uint64`
+ pub fn read_repeated_packed_uint64_into(
+ &mut self,
+ target: &mut Vec<u64>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_uint64()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `uint32`
+ pub fn read_repeated_packed_uint32_into(
+ &mut self,
+ target: &mut Vec<u32>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_uint32()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `sint64`
+ pub fn read_repeated_packed_sint64_into(
+ &mut self,
+ target: &mut Vec<i64>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_sint64()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `sint32`
+ pub fn read_repeated_packed_sint32_into(
+ &mut self,
+ target: &mut Vec<i32>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_sint32()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `fixed64`
+ pub fn read_repeated_packed_fixed64_into(
+ &mut self,
+ target: &mut Vec<u64>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ target.reserve((len / 8) as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_fixed64()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `fixed32`
+ pub fn read_repeated_packed_fixed32_into(
+ &mut self,
+ target: &mut Vec<u32>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ target.reserve((len / 4) as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_fixed32()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `sfixed64`
+ pub fn read_repeated_packed_sfixed64_into(
+ &mut self,
+ target: &mut Vec<i64>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ target.reserve((len / 8) as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_sfixed64()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `sfixed32`
+ pub fn read_repeated_packed_sfixed32_into(
+ &mut self,
+ target: &mut Vec<i32>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ target.reserve((len / 4) as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_sfixed32()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `bool`
+ pub fn read_repeated_packed_bool_into(&mut self, target: &mut Vec<bool>) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+
+ // regular bool value is 1-byte size
+ target.reserve(len as usize);
+
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_bool()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read repeated packed `enum` into `ProtobufEnum`
+ pub fn read_repeated_packed_enum_into<E: ProtobufEnum>(
+ &mut self,
+ target: &mut Vec<E>,
+ ) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ while !self.eof()? {
+ target.push(self.read_enum()?);
+ }
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read `UnknownValue`
+ pub fn read_unknown(
+ &mut self,
+ wire_type: wire_format::WireType,
+ ) -> ProtobufResult<UnknownValue> {
+ match wire_type {
+ wire_format::WireTypeVarint => {
+ self.read_raw_varint64().map(|v| UnknownValue::Varint(v))
+ }
+ wire_format::WireTypeFixed64 => self.read_fixed64().map(|v| UnknownValue::Fixed64(v)),
+ wire_format::WireTypeFixed32 => self.read_fixed32().map(|v| UnknownValue::Fixed32(v)),
+ wire_format::WireTypeLengthDelimited => {
+ let len = self.read_raw_varint32()?;
+ self.read_raw_bytes(len)
+ .map(|v| UnknownValue::LengthDelimited(v))
+ }
+ _ => Err(ProtobufError::WireError(WireError::UnexpectedWireType(
+ wire_type,
+ ))),
+ }
+ }
+
+ /// Skip field
+ pub fn skip_field(&mut self, wire_type: wire_format::WireType) -> ProtobufResult<()> {
+ self.read_unknown(wire_type).map(|_| ())
+ }
+
+ /// Read raw bytes into the supplied vector. The vector will be resized as needed and
+ /// overwritten.
+ pub fn read_raw_bytes_into(&mut self, count: u32, target: &mut Vec<u8>) -> ProtobufResult<()> {
+ if false {
+ // Master uses this version, but keep existing version for a while
+ // to avoid possible breakages.
+ return self.source.read_exact_to_vec(count as usize, target);
+ }
+
+ let count = count as usize;
+
+ // TODO: also do some limits when reading from unlimited source
+ if count as u64 > self.source.bytes_until_limit() {
+ return Err(ProtobufError::WireError(WireError::TruncatedMessage));
+ }
+
+ unsafe {
+ target.set_len(0);
+ }
+
+ if count >= READ_RAW_BYTES_MAX_ALLOC {
+ // avoid calling `reserve` on buf with very large buffer: could be a malformed message
+
+ let mut take = self.by_ref().take(count as u64);
+ take.read_to_end(target)?;
+
+ if target.len() != count {
+ return Err(ProtobufError::WireError(WireError::TruncatedMessage));
+ }
+ } else {
+ target.reserve(count);
+ unsafe {
+ target.set_len(count);
+ }
+
+ self.source.read_exact(target)?;
+ }
+ Ok(())
+ }
+
+ /// Read exact number of bytes
+ pub fn read_raw_bytes(&mut self, count: u32) -> ProtobufResult<Vec<u8>> {
+ let mut r = Vec::new();
+ self.read_raw_bytes_into(count, &mut r)?;
+ Ok(r)
+ }
+
+ /// Skip exact number of bytes
+ pub fn skip_raw_bytes(&mut self, count: u32) -> ProtobufResult<()> {
+ // TODO: make it more efficient
+ self.read_raw_bytes(count).map(|_| ())
+ }
+
+ /// Read `bytes` field, length delimited
+ pub fn read_bytes(&mut self) -> ProtobufResult<Vec<u8>> {
+ let mut r = Vec::new();
+ self.read_bytes_into(&mut r)?;
+ Ok(r)
+ }
+
+ /// Read `bytes` field, length delimited
+ #[cfg(feature = "bytes")]
+ pub fn read_carllerche_bytes(&mut self) -> ProtobufResult<Bytes> {
+ let len = self.read_raw_varint32()?;
+ self.read_raw_callerche_bytes(len as usize)
+ }
+
+ /// Read `string` field, length delimited
+ #[cfg(feature = "bytes")]
+ pub fn read_carllerche_chars(&mut self) -> ProtobufResult<Chars> {
+ let bytes = self.read_carllerche_bytes()?;
+ Ok(Chars::from_bytes(bytes)?)
+ }
+
+ /// Read `bytes` field, length delimited
+ pub fn read_bytes_into(&mut self, target: &mut Vec<u8>) -> ProtobufResult<()> {
+ let len = self.read_raw_varint32()?;
+ self.read_raw_bytes_into(len, target)?;
+ Ok(())
+ }
+
+ /// Read `string` field, length delimited
+ pub fn read_string(&mut self) -> ProtobufResult<String> {
+ let mut r = String::new();
+ self.read_string_into(&mut r)?;
+ Ok(r)
+ }
+
+ /// Read `string` field, length delimited
+ pub fn read_string_into(&mut self, target: &mut String) -> ProtobufResult<()> {
+ target.clear();
+ // take target's buffer
+ let mut vec = mem::replace(target, String::new()).into_bytes();
+ self.read_bytes_into(&mut vec)?;
+
+ let s = match String::from_utf8(vec) {
+ Ok(t) => t,
+ Err(_) => return Err(ProtobufError::WireError(WireError::Utf8Error)),
+ };
+ *target = s;
+ Ok(())
+ }
+
+ /// Read message, do not check if message is initialized
+ pub fn merge_message<M: Message>(&mut self, message: &mut M) -> ProtobufResult<()> {
+ let len = self.read_raw_varint64()?;
+ let old_limit = self.push_limit(len)?;
+ message.merge_from(self)?;
+ self.pop_limit(old_limit);
+ Ok(())
+ }
+
+ /// Read message
+ pub fn read_message<M: Message>(&mut self) -> ProtobufResult<M> {
+ let mut r: M = Message::new();
+ self.merge_message(&mut r)?;
+ r.check_initialized()?;
+ Ok(r)
+ }
+}
+
+impl<'a> Read for CodedInputStream<'a> {
+ fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
+ self.source.read(buf).map_err(Into::into)
+ }
+}
+
+impl<'a> BufRead for CodedInputStream<'a> {
+ fn fill_buf(&mut self) -> io::Result<&[u8]> {
+ self.source.fill_buf().map_err(Into::into)
+ }
+
+ fn consume(&mut self, amt: usize) {
+ self.source.consume(amt)
+ }
+}
+
+/// Helper internal utility, should not be used directly
+#[doc(hidden)]
+pub trait WithCodedInputStream {
+ fn with_coded_input_stream<T, F>(self, cb: F) -> ProtobufResult<T>
+ where
+ F: FnOnce(&mut CodedInputStream) -> ProtobufResult<T>;
+}
+
+impl<'a> WithCodedInputStream for &'a mut (dyn Read + 'a) {
+ fn with_coded_input_stream<T, F>(self, cb: F) -> ProtobufResult<T>
+ where
+ F: FnOnce(&mut CodedInputStream) -> ProtobufResult<T>,
+ {
+ let mut is = CodedInputStream::new(self);
+ let r = cb(&mut is)?;
+ is.check_eof()?;
+ Ok(r)
+ }
+}
+
+impl<'a> WithCodedInputStream for &'a mut (dyn BufRead + 'a) {
+ fn with_coded_input_stream<T, F>(self, cb: F) -> ProtobufResult<T>
+ where
+ F: FnOnce(&mut CodedInputStream) -> ProtobufResult<T>,
+ {
+ let mut is = CodedInputStream::from_buffered_reader(self);
+ let r = cb(&mut is)?;
+ is.check_eof()?;
+ Ok(r)
+ }
+}
+
+impl<'a> WithCodedInputStream for &'a [u8] {
+ fn with_coded_input_stream<T, F>(self, cb: F) -> ProtobufResult<T>
+ where
+ F: FnOnce(&mut CodedInputStream) -> ProtobufResult<T>,
+ {
+ let mut is = CodedInputStream::from_bytes(self);
+ let r = cb(&mut is)?;
+ is.check_eof()?;
+ Ok(r)
+ }
+}
+
+#[cfg(feature = "bytes")]
+impl<'a> WithCodedInputStream for &'a Bytes {
+ fn with_coded_input_stream<T, F>(self, cb: F) -> ProtobufResult<T>
+ where
+ F: FnOnce(&mut CodedInputStream) -> ProtobufResult<T>,
+ {
+ let mut is = CodedInputStream::from_carllerche_bytes(self);
+ let r = cb(&mut is)?;
+ is.check_eof()?;
+ Ok(r)
+ }
+}
+
+#[cfg(test)]
+mod test {
+
+ use std::fmt::Debug;
+ use std::io;
+ use std::io::BufRead;
+ use std::io::Read;
+
+ use crate::error::ProtobufError;
+ use crate::error::ProtobufResult;
+ use crate::hex::decode_hex;
+
+ use super::CodedInputStream;
+ use super::READ_RAW_BYTES_MAX_ALLOC;
+
+ fn test_read_partial<F>(hex: &str, mut callback: F)
+ where
+ F: FnMut(&mut CodedInputStream),
+ {
+ let d = decode_hex(hex);
+ let mut reader = io::Cursor::new(d);
+ let mut is = CodedInputStream::from_buffered_reader(&mut reader as &mut dyn BufRead);
+ assert_eq!(0, is.pos());
+ callback(&mut is);
+ }
+
+ fn test_read<F>(hex: &str, mut callback: F)
+ where
+ F: FnMut(&mut CodedInputStream),
+ {
+ let len = decode_hex(hex).len();
+ test_read_partial(hex, |reader| {
+ callback(reader);
+ assert!(reader.eof().expect("eof"));
+ assert_eq!(len as u64, reader.pos());
+ });
+ }
+
+ fn test_read_v<F, V>(hex: &str, v: V, mut callback: F)
+ where
+ F: FnMut(&mut CodedInputStream) -> ProtobufResult<V>,
+ V: PartialEq + Debug,
+ {
+ test_read(hex, |reader| {
+ assert_eq!(v, callback(reader).unwrap());
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_byte() {
+ test_read("17", |is| {
+ assert_eq!(23, is.read_raw_byte().unwrap());
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_varint() {
+ test_read_v("07", 7, |reader| reader.read_raw_varint32());
+ test_read_v("07", 7, |reader| reader.read_raw_varint64());
+
+ test_read_v("96 01", 150, |reader| reader.read_raw_varint32());
+ test_read_v("96 01", 150, |reader| reader.read_raw_varint64());
+
+ test_read_v(
+ "ff ff ff ff ff ff ff ff ff 01",
+ 0xffffffffffffffff,
+ |reader| reader.read_raw_varint64(),
+ );
+
+ test_read_v("ff ff ff ff 0f", 0xffffffff, |reader| {
+ reader.read_raw_varint32()
+ });
+ test_read_v("ff ff ff ff 0f", 0xffffffff, |reader| {
+ reader.read_raw_varint64()
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_vaint_malformed() {
+ // varint cannot have length > 10
+ test_read_partial("ff ff ff ff ff ff ff ff ff ff 01", |reader| {
+ let result = reader.read_raw_varint64();
+ match result {
+ // TODO: make an enum variant
+ Err(ProtobufError::WireError(..)) => (),
+ _ => panic!(),
+ }
+ });
+ test_read_partial("ff ff ff ff ff ff ff ff ff ff 01", |reader| {
+ let result = reader.read_raw_varint32();
+ match result {
+ // TODO: make an enum variant
+ Err(ProtobufError::WireError(..)) => (),
+ _ => panic!(),
+ }
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_varint_unexpected_eof() {
+ test_read_partial("96 97", |reader| {
+ let result = reader.read_raw_varint32();
+ match result {
+ Err(ProtobufError::WireError(..)) => (),
+ _ => panic!(),
+ }
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_varint_pos() {
+ test_read_partial("95 01 98", |reader| {
+ assert_eq!(149, reader.read_raw_varint32().unwrap());
+ assert_eq!(2, reader.pos());
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_int32() {
+ test_read_v("02", 2, |reader| reader.read_int32());
+ }
+
+ #[test]
+ fn test_input_stream_read_float() {
+ test_read_v("95 73 13 61", 17e19, |is| is.read_float());
+ }
+
+ #[test]
+ fn test_input_stream_read_double() {
+ test_read_v("40 d5 ab 68 b3 07 3d 46", 23e29, |is| is.read_double());
+ }
+
+ #[test]
+ fn test_input_stream_skip_raw_bytes() {
+ test_read("", |reader| {
+ reader.skip_raw_bytes(0).unwrap();
+ });
+ test_read("aa bb", |reader| {
+ reader.skip_raw_bytes(2).unwrap();
+ });
+ test_read("aa bb cc dd ee ff", |reader| {
+ reader.skip_raw_bytes(6).unwrap();
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_bytes() {
+ test_read("", |reader| {
+ assert_eq!(
+ Vec::from(&b""[..]),
+ reader.read_raw_bytes(0).expect("read_raw_bytes")
+ );
+ })
+ }
+
+ #[test]
+ fn test_input_stream_limits() {
+ test_read("aa bb cc", |is| {
+ let old_limit = is.push_limit(1).unwrap();
+ assert_eq!(1, is.bytes_until_limit());
+ let r1 = is.read_raw_bytes(1).unwrap();
+ assert_eq!(&[0xaa as u8], &r1[..]);
+ is.pop_limit(old_limit);
+ let r2 = is.read_raw_bytes(2).unwrap();
+ assert_eq!(&[0xbb as u8, 0xcc], &r2[..]);
+ });
+ }
+
+ #[test]
+ fn test_input_stream_io_read() {
+ test_read("aa bb cc", |is| {
+ let mut buf = [0; 3];
+ assert_eq!(Read::read(is, &mut buf).expect("io::Read"), 3);
+ assert_eq!(buf, [0xaa, 0xbb, 0xcc]);
+ });
+ }
+
+ #[test]
+ fn test_input_stream_io_bufread() {
+ test_read("aa bb cc", |is| {
+ assert_eq!(
+ BufRead::fill_buf(is).expect("io::BufRead::fill_buf"),
+ &[0xaa, 0xbb, 0xcc]
+ );
+ BufRead::consume(is, 3);
+ });
+ }
+
+ #[test]
+ fn test_input_stream_read_raw_bytes_into_huge() {
+ let mut v = Vec::new();
+ for i in 0..READ_RAW_BYTES_MAX_ALLOC + 1000 {
+ v.push((i % 10) as u8);
+ }
+
+ let mut slice: &[u8] = v.as_slice();
+
+ let mut is = CodedInputStream::new(&mut slice);
+
+ let mut buf = Vec::new();
+
+ is.read_raw_bytes_into(READ_RAW_BYTES_MAX_ALLOC as u32 + 10, &mut buf)
+ .expect("read");
+
+ assert_eq!(READ_RAW_BYTES_MAX_ALLOC + 10, buf.len());
+
+ buf.clear();
+
+ is.read_raw_bytes_into(1000 - 10, &mut buf).expect("read");
+
+ assert_eq!(1000 - 10, buf.len());
+
+ assert!(is.eof().expect("eof"));
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 08:29:20 +0000