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Commit | Line | Data |
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28884194 | 1 | //! Bytestream reading/writing functionality. |
37f2396b | 2 | pub use std::io::SeekFrom; |
90aa4e6b KS |
3 | use std::fs::File; |
4 | use std::io::prelude::*; | |
e243ceb4 | 5 | use std::ptr; |
90aa4e6b | 6 | |
28884194 | 7 | /// A list specifying general bytestream reading and writing errors. |
90aa4e6b KS |
8 | #[derive(Debug)] |
9 | pub enum ByteIOError { | |
28884194 | 10 | /// End of stream. |
90aa4e6b | 11 | EOF, |
28884194 | 12 | /// Wrong seek position was provided. |
90aa4e6b | 13 | WrongRange, |
28884194 | 14 | /// Tried to call read() on bytestream writer or write() on bytestream reader. |
90aa4e6b | 15 | WrongIOMode, |
28884194 | 16 | /// Functionality is not implemented. |
90aa4e6b | 17 | NotImplemented, |
28884194 | 18 | /// Read error. |
90aa4e6b | 19 | ReadError, |
28884194 | 20 | /// Write error. |
90aa4e6b | 21 | WriteError, |
28884194 | 22 | /// Seeking failed. |
90aa4e6b KS |
23 | SeekError, |
24 | } | |
25 | ||
28884194 | 26 | /// A specialised `Result` type for bytestream operations. |
296d86b2 | 27 | pub type ByteIOResult<T> = Result<T, ByteIOError>; |
90aa4e6b | 28 | |
28884194 | 29 | /// Common trait for bytestream operations. |
90aa4e6b | 30 | pub trait ByteIO { |
28884194 | 31 | /// Reads data into provided buffer. Fails if it cannot fill whole buffer. |
90aa4e6b | 32 | fn read_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize>; |
28884194 | 33 | /// Reads data into provided buffer. Partial read is treated as success. |
89de616c | 34 | fn read_buf_some(&mut self, buf: &mut [u8]) -> ByteIOResult<usize>; |
28884194 | 35 | /// Reads data into provided buffer but does not advance read position. |
794364cf | 36 | fn peek_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize>; |
28884194 | 37 | /// Reads single byte from the stream. |
90aa4e6b | 38 | fn read_byte(&mut self) -> ByteIOResult<u8>; |
28884194 | 39 | /// Returns the next byte value in the stream without advancing read position. |
794364cf | 40 | fn peek_byte(&mut self) -> ByteIOResult<u8>; |
28884194 | 41 | /// Writes buffer to the stream. |
d532000c | 42 | fn write_buf(&mut self, buf: &[u8]) -> ByteIOResult<()>; |
28884194 | 43 | /// Returns current read or write position. |
90aa4e6b | 44 | fn tell(&mut self) -> u64; |
28884194 | 45 | /// Seeks to the provided position. |
90aa4e6b | 46 | fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64>; |
28884194 | 47 | /// Tells whether this is end of stream. |
e243ceb4 | 48 | fn is_eof(&self) -> bool; |
28884194 | 49 | /// Reports whether stream is seekable or not. |
90aa4e6b | 50 | fn is_seekable(&mut self) -> bool; |
28884194 | 51 | /// Returns stream size or -1 if it is not known. |
d532000c | 52 | fn size(&mut self) -> i64; |
90aa4e6b KS |
53 | } |
54 | ||
28884194 KS |
55 | /// High-level bytestream reader. |
56 | /// | |
57 | /// User is supposed to create some reader implementing [`ByteIO`] trait e.g. [`MemoryReader`] and use it to create `ByteReader` which can be used for reading e.g. various integer types. | |
58 | /// | |
59 | /// # Examples | |
60 | /// | |
61 | /// ```` | |
62 | /// use nihav_core::io::byteio::{MemoryReader,ByteReader}; | |
63 | /// # use nihav_core::io::byteio::ByteIOResult; | |
64 | /// | |
65 | /// # fn foo() -> ByteIOResult<()> { | |
66 | /// let memory: [u8; 4] = [ 0, 42, 42, 0 ]; | |
67 | /// let mut mr = MemoryReader::new_read(&memory); | |
68 | /// let mut br = ByteReader::new(&mut mr); | |
69 | /// let val = br.read_u16be()?; // read 16-bit big-endian integer, should be 42 | |
70 | /// let val = br.read_u16le()?; // read 16-bit little-endian integer, should be 42 as well | |
71 | /// # Ok(()) | |
72 | /// # } | |
73 | /// ```` | |
74 | /// | |
75 | /// [`ByteIO`]: ./trait.ByteIO.html | |
76 | /// [`MemoryReader`]: ./struct.MemoryReader.html | |
90aa4e6b KS |
77 | #[allow(dead_code)] |
78 | pub struct ByteReader<'a> { | |
79 | io: &'a mut ByteIO, | |
80 | } | |
81 | ||
28884194 | 82 | /// Bytestream reader from memory. |
90aa4e6b KS |
83 | pub struct MemoryReader<'a> { |
84 | buf: &'a [u8], | |
90aa4e6b | 85 | pos: usize, |
90aa4e6b KS |
86 | } |
87 | ||
28884194 | 88 | /// Bytestream reader from file. |
90aa4e6b KS |
89 | pub struct FileReader<'a> { |
90 | file: &'a File, | |
91 | eof: bool, | |
92 | } | |
93 | ||
94 | macro_rules! read_int { | |
95 | ($s: ident, $inttype: ty, $size: expr, $which: ident) => ({ | |
90aa4e6b | 96 | unsafe { |
e243ceb4 KS |
97 | let mut buf: $inttype = 0; |
98 | $s.read_buf(&mut *(&mut buf as *mut $inttype as *mut [u8; $size]))?; | |
99 | Ok(buf.$which()) | |
90aa4e6b KS |
100 | } |
101 | }) | |
102 | } | |
103 | ||
794364cf KS |
104 | macro_rules! peek_int { |
105 | ($s: ident, $inttype: ty, $size: expr, $which: ident) => ({ | |
794364cf | 106 | unsafe { |
e243ceb4 KS |
107 | let mut buf: $inttype = 0; |
108 | $s.peek_buf(&mut *(&mut buf as *mut $inttype as *mut [u8; $size]))?; | |
109 | Ok(buf.$which()) | |
794364cf KS |
110 | } |
111 | }) | |
112 | } | |
113 | ||
95058bc1 KS |
114 | macro_rules! read_int_func { |
115 | ($s: ident, $inttype: ty, $size: expr, $which: ident) => { | |
28884194 | 116 | /// Reads integer of certain size and endianness. |
95058bc1 KS |
117 | pub fn $s(src: &[u8]) -> ByteIOResult<$inttype> { |
118 | if src.len() < $size { return Err(ByteIOError::ReadError); } | |
119 | unsafe { | |
e243ceb4 | 120 | let mut buf: $inttype = 0; |
c9087a4c | 121 | ptr::copy_nonoverlapping(src.as_ptr(), &mut buf as *mut $inttype as *mut u8, std::mem::size_of::<$inttype>()); |
e243ceb4 | 122 | Ok(buf.$which()) |
95058bc1 KS |
123 | } |
124 | } | |
125 | } | |
126 | } | |
127 | ||
128 | read_int_func!(read_u16be, u16, 2, to_be); | |
129 | read_int_func!(read_u16le, u16, 2, to_le); | |
130 | read_int_func!(read_u32be, u32, 4, to_be); | |
131 | read_int_func!(read_u32le, u32, 4, to_le); | |
132 | read_int_func!(read_u64be, u64, 8, to_be); | |
133 | read_int_func!(read_u64le, u64, 8, to_le); | |
134 | ||
28884194 KS |
135 | /// Reads 24-bit big-endian integer. |
136 | /// | |
137 | /// # Example | |
138 | /// | |
139 | /// ```` | |
140 | /// use nihav_core::io::byteio::read_u24be; | |
141 | /// # use nihav_core::io::byteio::ByteIOResult; | |
142 | /// | |
143 | /// # fn foo() -> ByteIOResult<()> { | |
144 | /// let src: [u8; 3] = [ 1, 2, 3]; | |
145 | /// let value = read_u24be(&src)?; // should return 0x010203 | |
146 | /// # Ok(()) | |
147 | /// # } | |
148 | /// ```` | |
95058bc1 KS |
149 | pub fn read_u24be(src: &[u8]) -> ByteIOResult<u32> { |
150 | if src.len() < 3 { return Err(ByteIOError::ReadError); } | |
e243ceb4 | 151 | Ok((u32::from(src[0]) << 16) | (u32::from(src[1]) << 8) | u32::from(src[2])) |
95058bc1 | 152 | } |
28884194 | 153 | /// Reads 24-bit little-endian integer. |
95058bc1 KS |
154 | pub fn read_u24le(src: &[u8]) -> ByteIOResult<u32> { |
155 | if src.len() < 3 { return Err(ByteIOError::ReadError); } | |
e243ceb4 | 156 | Ok((u32::from(src[2]) << 16) | (u32::from(src[1]) << 8) | u32::from(src[0])) |
95058bc1 | 157 | } |
28884194 | 158 | /// Reads 32-bit big-endian floating point number. |
02a5bdaf | 159 | pub fn read_f32be(src: &[u8]) -> ByteIOResult<f32> { Ok(f32::from_bits(read_u32be(src)?)) } |
28884194 | 160 | /// Reads 32-bit little-endian floating point number. |
02a5bdaf | 161 | pub fn read_f32le(src: &[u8]) -> ByteIOResult<f32> { Ok(f32::from_bits(read_u32le(src)?)) } |
28884194 | 162 | /// Reads 64-bit big-endian floating point number. |
02a5bdaf | 163 | pub fn read_f64be(src: &[u8]) -> ByteIOResult<f64> { Ok(f64::from_bits(read_u64be(src)?)) } |
28884194 | 164 | /// Reads 64-bit little-endian floating point number. |
02a5bdaf | 165 | pub fn read_f64le(src: &[u8]) -> ByteIOResult<f64> { Ok(f64::from_bits(read_u64le(src)?)) } |
95058bc1 | 166 | |
95c7f2f6 KS |
167 | macro_rules! write_int_func { |
168 | ($s: ident, $inttype: ty, $size: expr, $which: ident) => { | |
28884194 | 169 | /// Writes integer of certain size and endianness into byte buffer. |
95c7f2f6 KS |
170 | pub fn $s(dst: &mut [u8], val: $inttype) -> ByteIOResult<()> { |
171 | if dst.len() < $size { return Err(ByteIOError::WriteError); } | |
172 | unsafe { | |
173 | let val = val.$which(); | |
174 | ptr::copy_nonoverlapping(&val as *const $inttype as *const u8, dst.as_mut_ptr(), std::mem::size_of::<$inttype>()); | |
175 | } | |
176 | Ok(()) | |
177 | } | |
178 | } | |
179 | } | |
180 | ||
181 | write_int_func!(write_u16be, u16, 2, to_be); | |
182 | write_int_func!(write_u16le, u16, 2, to_le); | |
183 | write_int_func!(write_u32be, u32, 4, to_be); | |
184 | write_int_func!(write_u32le, u32, 4, to_le); | |
185 | write_int_func!(write_u64be, u64, 8, to_be); | |
186 | write_int_func!(write_u64le, u64, 8, to_le); | |
187 | ||
28884194 KS |
188 | /// Writes 24-bit big-endian integer to the provided buffer. |
189 | /// | |
190 | /// # Example | |
191 | /// | |
192 | /// ```` | |
193 | /// use nihav_core::io::byteio::write_u24be; | |
194 | /// # use nihav_core::io::byteio::ByteIOResult; | |
195 | /// | |
196 | /// # fn foo() -> ByteIOResult<()> { | |
197 | /// let mut dst = [0u8; 3]; | |
198 | /// write_u24be(&mut dst, 0x010203)?; | |
199 | /// // dst should contain [ 1, 2, 3] now | |
200 | /// # Ok(()) | |
201 | /// # } | |
202 | /// ```` | |
95c7f2f6 KS |
203 | pub fn write_u24be(dst: &mut [u8], val: u32) -> ByteIOResult<()> { |
204 | if dst.len() < 3 { return Err(ByteIOError::WriteError); } | |
205 | dst[0] = (val >> 16) as u8; | |
206 | dst[1] = (val >> 8) as u8; | |
207 | dst[2] = (val >> 0) as u8; | |
208 | Ok(()) | |
209 | } | |
28884194 | 210 | /// Writes 24-bit little-endian integer to the provided buffer. |
95c7f2f6 KS |
211 | pub fn write_u24le(dst: &mut [u8], val: u32) -> ByteIOResult<()> { |
212 | if dst.len() < 3 { return Err(ByteIOError::WriteError); } | |
213 | dst[0] = (val >> 0) as u8; | |
214 | dst[1] = (val >> 8) as u8; | |
215 | dst[2] = (val >> 16) as u8; | |
216 | Ok(()) | |
217 | } | |
28884194 | 218 | /// Writes 32-bit big-endian floating point number to the provided buffer. |
02a5bdaf | 219 | pub fn write_f32be(dst: &mut [u8], val: f32) -> ByteIOResult<()> { write_u32be(dst, val.to_bits()) } |
28884194 | 220 | /// Writes 32-bit little-endian floating point number to the provided buffer. |
02a5bdaf | 221 | pub fn write_f32le(dst: &mut [u8], val: f32) -> ByteIOResult<()> { write_u32le(dst, val.to_bits()) } |
28884194 | 222 | /// Writes 64-bit big-endian floating point number to the provided buffer. |
02a5bdaf | 223 | pub fn write_f64be(dst: &mut [u8], val: f64) -> ByteIOResult<()> { write_u64be(dst, val.to_bits()) } |
28884194 | 224 | /// Writes 64-bit little-endian floating point number to the provided buffer. |
02a5bdaf | 225 | pub fn write_f64le(dst: &mut [u8], val: f64) -> ByteIOResult<()> { write_u64le(dst, val.to_bits()) } |
95c7f2f6 | 226 | |
90aa4e6b | 227 | impl<'a> ByteReader<'a> { |
28884194 KS |
228 | /// Constructs a new instance of bytestream reader. |
229 | /// | |
230 | /// # Examples | |
231 | /// | |
232 | /// ```` | |
233 | /// use nihav_core::io::byteio::{MemoryReader,ByteReader}; | |
234 | /// # use nihav_core::io::byteio::ByteIOResult; | |
235 | /// | |
236 | /// # fn foo() -> ByteIOResult<()> { | |
237 | /// let memory: [u8; 4] = [ 0, 42, 42, 0 ]; | |
238 | /// let mut mr = MemoryReader::new_read(&memory); | |
239 | /// let mut br = ByteReader::new(&mut mr); | |
240 | /// # Ok(()) | |
241 | /// # } | |
242 | /// ```` | |
e243ceb4 | 243 | pub fn new(io: &'a mut ByteIO) -> Self { ByteReader { io } } |
90aa4e6b | 244 | |
28884194 | 245 | /// Reads data into provided buffer. Partial read is treated as success. |
90aa4e6b KS |
246 | pub fn read_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { |
247 | self.io.read_buf(buf) | |
248 | } | |
249 | ||
28884194 | 250 | /// Reads data into provided buffer. Partial read is treated as success. |
89de616c KS |
251 | pub fn read_buf_some(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { |
252 | self.io.read_buf_some(buf) | |
253 | } | |
254 | ||
28884194 | 255 | /// Reads data into provided buffer but does not advance read position. |
794364cf KS |
256 | pub fn peek_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { |
257 | self.io.peek_buf(buf) | |
258 | } | |
259 | ||
28884194 | 260 | /// Reads single byte from the stream. |
90aa4e6b KS |
261 | pub fn read_byte(&mut self) -> ByteIOResult<u8> { |
262 | self.io.read_byte() | |
263 | } | |
264 | ||
28884194 | 265 | /// Returns the next byte value in the stream without advancing read position. |
794364cf KS |
266 | pub fn peek_byte(&mut self) -> ByteIOResult<u8> { |
267 | self.io.peek_byte() | |
268 | } | |
269 | ||
28884194 | 270 | /// Reads 16-bit big-endian integer from the stream. |
90aa4e6b KS |
271 | pub fn read_u16be(&mut self) -> ByteIOResult<u16> { |
272 | read_int!(self, u16, 2, to_be) | |
273 | } | |
274 | ||
28884194 | 275 | /// Reads 16-bit big-endian integer from the stream without advancing read position. |
794364cf KS |
276 | pub fn peek_u16be(&mut self) -> ByteIOResult<u16> { |
277 | peek_int!(self, u16, 2, to_be) | |
278 | } | |
279 | ||
28884194 | 280 | /// Reads 24-bit big-endian integer from the stream. |
90aa4e6b | 281 | pub fn read_u24be(&mut self) -> ByteIOResult<u32> { |
794364cf KS |
282 | let p16 = self.read_u16be()?; |
283 | let p8 = self.read_byte()?; | |
e243ceb4 | 284 | Ok((u32::from(p16) << 8) | u32::from(p8)) |
794364cf KS |
285 | } |
286 | ||
28884194 | 287 | /// Reads 24-bit big-endian integer from the stream without advancing read position. |
794364cf KS |
288 | pub fn peek_u24be(&mut self) -> ByteIOResult<u32> { |
289 | let mut src: [u8; 3] = [0; 3]; | |
290 | self.peek_buf(&mut src)?; | |
e243ceb4 | 291 | Ok((u32::from(src[0]) << 16) | (u32::from(src[1]) << 8) | u32::from(src[2])) |
90aa4e6b KS |
292 | } |
293 | ||
28884194 | 294 | /// Reads 32-bit big-endian integer from the stream. |
90aa4e6b KS |
295 | pub fn read_u32be(&mut self) -> ByteIOResult<u32> { |
296 | read_int!(self, u32, 4, to_be) | |
297 | } | |
298 | ||
28884194 | 299 | /// Reads 32-bit big-endian integer from the stream without advancing read position. |
794364cf KS |
300 | pub fn peek_u32be(&mut self) -> ByteIOResult<u32> { |
301 | peek_int!(self, u32, 4, to_be) | |
302 | } | |
303 | ||
28884194 | 304 | /// Reads 64-bit big-endian integer from the stream. |
90aa4e6b KS |
305 | pub fn read_u64be(&mut self) -> ByteIOResult<u64> { |
306 | read_int!(self, u64, 8, to_be) | |
307 | } | |
308 | ||
28884194 | 309 | /// Reads 64-bit big-endian integer from the stream without advancing read position. |
794364cf KS |
310 | pub fn peek_u64be(&mut self) -> ByteIOResult<u64> { |
311 | peek_int!(self, u64, 8, to_be) | |
312 | } | |
313 | ||
28884194 | 314 | /// Reads 32-bit big-endian floating point number from the stream. |
02a5bdaf KS |
315 | pub fn read_f32be(&mut self) -> ByteIOResult<f32> { |
316 | Ok(f32::from_bits(self.read_u32be()?)) | |
317 | } | |
318 | ||
28884194 | 319 | /// Reads 32-bit big-endian floating point number from the stream without advancing read position. |
02a5bdaf KS |
320 | pub fn peek_f32be(&mut self) -> ByteIOResult<f32> { |
321 | Ok(f32::from_bits(self.peek_u32be()?)) | |
322 | } | |
323 | ||
28884194 | 324 | /// Reads 64-bit big-endian floating point number from the stream. |
02a5bdaf KS |
325 | pub fn read_f64be(&mut self) -> ByteIOResult<f64> { |
326 | Ok(f64::from_bits(self.read_u64be()?)) | |
327 | } | |
328 | ||
28884194 | 329 | /// Reads 64-bit big-endian floating point number from the stream without advancing read position. |
02a5bdaf KS |
330 | pub fn peek_f64be(&mut self) -> ByteIOResult<f64> { |
331 | Ok(f64::from_bits(self.peek_u64be()?)) | |
332 | } | |
333 | ||
28884194 | 334 | /// Reads 16-bit little-endian integer from the stream. |
90aa4e6b KS |
335 | pub fn read_u16le(&mut self) -> ByteIOResult<u16> { |
336 | read_int!(self, u16, 2, to_le) | |
337 | } | |
338 | ||
28884194 | 339 | /// Reads 16-bit little-endian integer from the stream without advancing read position. |
794364cf KS |
340 | pub fn peek_u16le(&mut self) -> ByteIOResult<u16> { |
341 | peek_int!(self, u16, 2, to_le) | |
342 | } | |
343 | ||
28884194 | 344 | /// Reads 24-bit little-endian integer from the stream. |
90aa4e6b | 345 | pub fn read_u24le(&mut self) -> ByteIOResult<u32> { |
794364cf KS |
346 | let p8 = self.read_byte()?; |
347 | let p16 = self.read_u16le()?; | |
e243ceb4 | 348 | Ok((u32::from(p16) << 8) | u32::from(p8)) |
794364cf KS |
349 | } |
350 | ||
28884194 | 351 | /// Reads 24-bit little-endian integer from the stream without advancing read position. |
794364cf KS |
352 | pub fn peek_u24le(&mut self) -> ByteIOResult<u32> { |
353 | let mut src: [u8; 3] = [0; 3]; | |
354 | self.peek_buf(&mut src)?; | |
e243ceb4 | 355 | Ok(u32::from(src[0]) | (u32::from(src[1]) << 8) | (u32::from(src[2]) << 16)) |
90aa4e6b KS |
356 | } |
357 | ||
28884194 | 358 | /// Reads 32-bit little-endian integer from the stream. |
90aa4e6b KS |
359 | pub fn read_u32le(&mut self) -> ByteIOResult<u32> { |
360 | read_int!(self, u32, 4, to_le) | |
361 | } | |
362 | ||
28884194 | 363 | /// Reads 32-bit little-endian integer from the stream without advancing read position. |
794364cf KS |
364 | pub fn peek_u32le(&mut self) -> ByteIOResult<u32> { |
365 | peek_int!(self, u32, 4, to_le) | |
366 | } | |
367 | ||
28884194 | 368 | /// Reads 64-bit little-endian integer from the stream. |
90aa4e6b KS |
369 | pub fn read_u64le(&mut self) -> ByteIOResult<u64> { |
370 | read_int!(self, u64, 8, to_le) | |
371 | } | |
372 | ||
28884194 | 373 | /// Reads 64-bit little-endian integer from the stream without advancing read position. |
794364cf KS |
374 | pub fn peek_u64le(&mut self) -> ByteIOResult<u64> { |
375 | peek_int!(self, u64, 8, to_le) | |
376 | } | |
377 | ||
28884194 | 378 | /// Reads 32-bit little-endian floating point number from the stream. |
02a5bdaf KS |
379 | pub fn read_f32le(&mut self) -> ByteIOResult<f32> { |
380 | Ok(f32::from_bits(self.read_u32le()?)) | |
381 | } | |
382 | ||
28884194 | 383 | /// Reads 32-bit little-endian floating point number from the stream without advancing read position. |
02a5bdaf KS |
384 | pub fn peek_f32le(&mut self) -> ByteIOResult<f32> { |
385 | Ok(f32::from_bits(self.peek_u32le()?)) | |
386 | } | |
387 | ||
28884194 | 388 | /// Reads 64-bit little-endian floating point number from the stream. |
02a5bdaf KS |
389 | pub fn read_f64le(&mut self) -> ByteIOResult<f64> { |
390 | Ok(f64::from_bits(self.read_u64le()?)) | |
391 | } | |
392 | ||
28884194 | 393 | /// Reads 64-bit little-endian floating point number from the stream without advancing read position. |
02a5bdaf KS |
394 | pub fn peek_f64le(&mut self) -> ByteIOResult<f64> { |
395 | Ok(f64::from_bits(self.peek_u64le()?)) | |
396 | } | |
397 | ||
28884194 | 398 | /// Skips requested number of bytes. |
6b167b0c | 399 | pub fn read_skip(&mut self, len: usize) -> ByteIOResult<()> { |
90aa4e6b KS |
400 | if self.io.is_seekable() { |
401 | self.io.seek(SeekFrom::Current(len as i64))?; | |
402 | } else { | |
403 | let mut ssize = len; | |
404 | let mut buf : [u8; 16] = [0; 16]; | |
9037cf6b | 405 | let bref = &mut buf; |
90aa4e6b KS |
406 | while ssize > bref.len() { |
407 | self.io.read_buf(bref)?; | |
408 | ssize -= bref.len(); | |
409 | } | |
410 | while ssize > 0 { | |
411 | self.io.read_byte()?; | |
e243ceb4 | 412 | ssize -= 1; |
90aa4e6b KS |
413 | } |
414 | } | |
6b167b0c | 415 | Ok(()) |
90aa4e6b KS |
416 | } |
417 | ||
28884194 | 418 | /// Returns current read position. |
90aa4e6b KS |
419 | pub fn tell(&mut self) -> u64 { |
420 | self.io.tell() | |
421 | } | |
422 | ||
28884194 | 423 | /// Seeks to the provided position. |
90aa4e6b KS |
424 | pub fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64> { |
425 | self.io.seek(pos) | |
426 | } | |
427 | ||
28884194 | 428 | /// Tells whether this is end of stream. |
e243ceb4 | 429 | pub fn is_eof(&self) -> bool { |
90aa4e6b KS |
430 | self.io.is_eof() |
431 | } | |
96c6be97 | 432 | |
28884194 | 433 | /// Returns stream size or -1 if it is not known. |
96c6be97 KS |
434 | pub fn size(&mut self) -> i64 { |
435 | self.io.size() | |
436 | } | |
437 | ||
28884194 | 438 | /// Reports number of bytes left in the stream. |
96c6be97 KS |
439 | pub fn left(&mut self) -> i64 { |
440 | let size = self.io.size(); | |
441 | if size == -1 { return -1; } | |
e243ceb4 | 442 | size - (self.io.tell() as i64) |
96c6be97 | 443 | } |
90aa4e6b KS |
444 | } |
445 | ||
446 | impl<'a> MemoryReader<'a> { | |
28884194 | 447 | /// Constructs a new instance of `MemoryReader`. |
90aa4e6b | 448 | pub fn new_read(buf: &'a [u8]) -> Self { |
1be85e00 | 449 | MemoryReader { buf, pos: 0 } |
90aa4e6b KS |
450 | } |
451 | ||
452 | fn real_seek(&mut self, pos: i64) -> ByteIOResult<u64> { | |
1be85e00 | 453 | if pos < 0 || (pos as usize) > self.buf.len() { |
e243ceb4 | 454 | return Err(ByteIOError::WrongRange); |
90aa4e6b KS |
455 | } |
456 | self.pos = pos as usize; | |
457 | Ok(pos as u64) | |
458 | } | |
90aa4e6b KS |
459 | } |
460 | ||
461 | impl<'a> ByteIO for MemoryReader<'a> { | |
462 | fn read_byte(&mut self) -> ByteIOResult<u8> { | |
90aa4e6b KS |
463 | if self.is_eof() { return Err(ByteIOError::EOF); } |
464 | let res = self.buf[self.pos]; | |
e243ceb4 | 465 | self.pos += 1; |
90aa4e6b KS |
466 | Ok(res) |
467 | } | |
468 | ||
794364cf KS |
469 | fn peek_byte(&mut self) -> ByteIOResult<u8> { |
470 | if self.is_eof() { return Err(ByteIOError::EOF); } | |
471 | Ok(self.buf[self.pos]) | |
472 | } | |
473 | ||
474 | fn peek_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
1be85e00 | 475 | let copy_size = if self.buf.len() - self.pos < buf.len() { self.buf.len() } else { buf.len() }; |
90aa4e6b | 476 | if copy_size == 0 { return Err(ByteIOError::EOF); } |
e243ceb4 KS |
477 | let dst = &mut buf[0..copy_size]; |
478 | dst.copy_from_slice(&self.buf[self.pos..][..copy_size]); | |
90aa4e6b KS |
479 | Ok(copy_size) |
480 | } | |
481 | ||
794364cf | 482 | fn read_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { |
89de616c KS |
483 | let read_size = self.peek_buf(buf)?; |
484 | if read_size < buf.len() { return Err(ByteIOError::EOF); } | |
485 | self.pos += read_size; | |
486 | Ok(read_size) | |
487 | } | |
488 | ||
489 | fn read_buf_some(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
794364cf KS |
490 | let read_size = self.peek_buf(buf)?; |
491 | self.pos += read_size; | |
492 | Ok(read_size) | |
493 | } | |
494 | ||
90aa4e6b | 495 | #[allow(unused_variables)] |
d532000c | 496 | fn write_buf(&mut self, buf: &[u8]) -> ByteIOResult<()> { |
90aa4e6b KS |
497 | Err(ByteIOError::NotImplemented) |
498 | } | |
499 | ||
500 | fn tell(&mut self) -> u64 { | |
501 | self.pos as u64 | |
502 | } | |
503 | ||
504 | fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64> { | |
1be85e00 KS |
505 | let cur_pos = self.pos as i64; |
506 | let cur_size = self.buf.len() as i64; | |
90aa4e6b KS |
507 | match pos { |
508 | SeekFrom::Start(x) => self.real_seek(x as i64), | |
509 | SeekFrom::Current(x) => self.real_seek(cur_pos + x), | |
510 | SeekFrom::End(x) => self.real_seek(cur_size + x), | |
511 | } | |
512 | } | |
513 | ||
e243ceb4 | 514 | fn is_eof(&self) -> bool { |
1be85e00 | 515 | self.pos >= self.buf.len() |
90aa4e6b KS |
516 | } |
517 | ||
518 | fn is_seekable(&mut self) -> bool { | |
519 | true | |
520 | } | |
d532000c KS |
521 | |
522 | fn size(&mut self) -> i64 { | |
523 | self.buf.len() as i64 | |
524 | } | |
90aa4e6b KS |
525 | } |
526 | ||
527 | impl<'a> FileReader<'a> { | |
528 | ||
28884194 | 529 | /// Constructs a new instance of `FileReader`. |
90aa4e6b | 530 | pub fn new_read(file: &'a mut File) -> Self { |
e243ceb4 | 531 | FileReader { file, eof : false } |
90aa4e6b KS |
532 | } |
533 | } | |
534 | ||
535 | impl<'a> ByteIO for FileReader<'a> { | |
536 | fn read_byte(&mut self) -> ByteIOResult<u8> { | |
537 | let mut byte : [u8; 1] = [0]; | |
e243ceb4 KS |
538 | let ret = self.file.read(&mut byte); |
539 | if ret.is_err() { return Err(ByteIOError::ReadError); } | |
540 | let sz = ret.unwrap(); | |
90aa4e6b KS |
541 | if sz == 0 { self.eof = true; return Err(ByteIOError::EOF); } |
542 | Ok (byte[0]) | |
543 | } | |
544 | ||
794364cf KS |
545 | fn peek_byte(&mut self) -> ByteIOResult<u8> { |
546 | let b = self.read_byte()?; | |
547 | self.seek(SeekFrom::Current(-1))?; | |
548 | Ok(b) | |
549 | } | |
550 | ||
90aa4e6b | 551 | fn read_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { |
e243ceb4 KS |
552 | let ret = self.file.read(buf); |
553 | if ret.is_err() { return Err(ByteIOError::ReadError); } | |
554 | let sz = ret.unwrap(); | |
89de616c KS |
555 | if sz < buf.len() { self.eof = true; return Err(ByteIOError::EOF); } |
556 | Ok(sz) | |
557 | } | |
558 | ||
559 | fn read_buf_some(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
e243ceb4 KS |
560 | let ret = self.file.read(buf); |
561 | if ret.is_err() { return Err(ByteIOError::ReadError); } | |
562 | let sz = ret.unwrap(); | |
90aa4e6b KS |
563 | if sz < buf.len() { self.eof = true; } |
564 | Ok(sz) | |
565 | } | |
566 | ||
794364cf KS |
567 | fn peek_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { |
568 | let size = self.read_buf(buf)?; | |
569 | self.seek(SeekFrom::Current(-(size as i64)))?; | |
570 | Ok(size) | |
571 | } | |
572 | ||
90aa4e6b | 573 | #[allow(unused_variables)] |
d532000c | 574 | fn write_buf(&mut self, buf: &[u8]) -> ByteIOResult<()> { |
90aa4e6b KS |
575 | Err(ByteIOError::NotImplemented) |
576 | } | |
577 | ||
578 | fn tell(&mut self) -> u64 { | |
579 | self.file.seek(SeekFrom::Current(0)).unwrap() | |
580 | } | |
581 | ||
582 | fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64> { | |
583 | let res = self.file.seek(pos); | |
584 | match res { | |
585 | Ok(r) => Ok(r), | |
586 | Err(_) => Err(ByteIOError::SeekError), | |
587 | } | |
588 | } | |
589 | ||
e243ceb4 | 590 | fn is_eof(&self) -> bool { |
90aa4e6b KS |
591 | self.eof |
592 | } | |
593 | ||
594 | fn is_seekable(&mut self) -> bool { | |
595 | true | |
596 | } | |
d532000c KS |
597 | |
598 | fn size(&mut self) -> i64 { | |
599 | -1 | |
600 | } | |
601 | } | |
602 | ||
28884194 KS |
603 | /// High-level bytestream writer. |
604 | /// | |
605 | /// User is supposed to create some writer implementing [`ByteIO`] trait e.g. [`MemoryWriter`] and use it to create `ByteWriter` which can be used for writing e.g. various integer types. | |
606 | /// | |
607 | /// # Examples | |
608 | /// | |
609 | /// ```` | |
610 | /// use nihav_core::io::byteio::{MemoryWriter,ByteWriter}; | |
611 | /// # use nihav_core::io::byteio::ByteIOResult; | |
612 | /// | |
613 | /// # fn foo() -> ByteIOResult<()> { | |
614 | /// let mut memory = [0u8; 4]; | |
615 | /// let mut mw = MemoryWriter::new_write(&mut memory); | |
616 | /// let mut bw = ByteWriter::new(&mut mw); | |
617 | /// let val = bw.write_u16be(42)?; // memory should be [ 0, 42, 0, 0 ] | |
618 | /// let val = bw.write_u16le(42)?; // memory should be [ 0, 42, 42, 0 ] | |
619 | /// # Ok(()) | |
620 | /// # } | |
621 | /// ```` | |
622 | /// | |
623 | /// [`ByteIO`]: ./trait.ByteIO.html | |
624 | /// [`MemoryWriter`]: ./struct.MemoryWriter.html | |
d532000c KS |
625 | #[allow(dead_code)] |
626 | pub struct ByteWriter<'a> { | |
627 | io: &'a mut ByteIO, | |
628 | } | |
629 | ||
28884194 | 630 | /// Bytestream writer to memory. |
d532000c KS |
631 | pub struct MemoryWriter<'a> { |
632 | buf: &'a mut [u8], | |
d532000c KS |
633 | pos: usize, |
634 | } | |
635 | ||
28884194 | 636 | /// Bytestream writer to file. |
5eb3cc60 KS |
637 | pub struct FileWriter { |
638 | file: File, | |
d532000c KS |
639 | } |
640 | ||
641 | impl<'a> ByteWriter<'a> { | |
28884194 | 642 | /// Constructs a new instance of `ByteWriter`. |
e243ceb4 | 643 | pub fn new(io: &'a mut ByteIO) -> Self { ByteWriter { io } } |
d532000c | 644 | |
28884194 | 645 | /// Writes byte array to the output. |
d532000c KS |
646 | pub fn write_buf(&mut self, buf: &[u8]) -> ByteIOResult<()> { |
647 | self.io.write_buf(buf) | |
648 | } | |
649 | ||
28884194 | 650 | /// Writes single byte to the output. |
d532000c KS |
651 | pub fn write_byte(&mut self, val: u8) -> ByteIOResult<()> { |
652 | let buf: [u8; 1] = [val]; | |
653 | self.io.write_buf(&buf) | |
654 | } | |
655 | ||
28884194 | 656 | /// Writes 16-bit big-endian integer to the output. |
d532000c KS |
657 | pub fn write_u16be(&mut self, val: u16) -> ByteIOResult<()> { |
658 | let buf: [u8; 2] = [((val >> 8) & 0xFF) as u8, (val & 0xFF) as u8]; | |
659 | self.io.write_buf(&buf) | |
660 | } | |
661 | ||
28884194 | 662 | /// Writes 16-bit little-endian integer to the output. |
d532000c KS |
663 | pub fn write_u16le(&mut self, val: u16) -> ByteIOResult<()> { |
664 | let buf: [u8; 2] = [(val & 0xFF) as u8, ((val >> 8) & 0xFF) as u8]; | |
665 | self.io.write_buf(&buf) | |
666 | } | |
667 | ||
28884194 | 668 | /// Writes 24-bit big-endian integer to the output. |
d532000c KS |
669 | pub fn write_u24be(&mut self, val: u32) -> ByteIOResult<()> { |
670 | let buf: [u8; 3] = [((val >> 16) & 0xFF) as u8, ((val >> 8) & 0xFF) as u8, (val & 0xFF) as u8]; | |
671 | self.write_buf(&buf) | |
672 | } | |
673 | ||
28884194 | 674 | /// Writes 24-bit little-endian integer to the output. |
d532000c KS |
675 | pub fn write_u24le(&mut self, val: u32) -> ByteIOResult<()> { |
676 | let buf: [u8; 3] = [(val & 0xFF) as u8, ((val >> 8) & 0xFF) as u8, ((val >> 16) & 0xFF) as u8]; | |
677 | self.write_buf(&buf) | |
678 | } | |
679 | ||
28884194 | 680 | /// Writes 32-bit big-endian integer to the output. |
d532000c KS |
681 | pub fn write_u32be(&mut self, val: u32) -> ByteIOResult<()> { |
682 | self.write_u16be(((val >> 16) & 0xFFFF) as u16)?; | |
683 | self.write_u16be((val & 0xFFFF) as u16) | |
684 | } | |
685 | ||
28884194 | 686 | /// Writes 32-bit little-endian integer to the output. |
d532000c KS |
687 | pub fn write_u32le(&mut self, val: u32) -> ByteIOResult<()> { |
688 | self.write_u16le((val & 0xFFFF) as u16)?; | |
689 | self.write_u16le(((val >> 16) & 0xFFFF) as u16) | |
690 | } | |
691 | ||
28884194 | 692 | /// Writes 64-bit big-endian integer to the output. |
d532000c | 693 | pub fn write_u64be(&mut self, val: u64) -> ByteIOResult<()> { |
e243ceb4 KS |
694 | self.write_u32be((val >> 32) as u32)?; |
695 | self.write_u32be(val as u32) | |
d532000c KS |
696 | } |
697 | ||
28884194 | 698 | /// Writes 64-bit little-endian integer to the output. |
d532000c | 699 | pub fn write_u64le(&mut self, val: u64) -> ByteIOResult<()> { |
e243ceb4 KS |
700 | self.write_u32le(val as u32)?; |
701 | self.write_u32le((val >> 32) as u32) | |
d532000c KS |
702 | } |
703 | ||
28884194 | 704 | /// Writes 32-bit big-endian floating point number to the output. |
02a5bdaf KS |
705 | pub fn write_f32be(&mut self, val: f32) -> ByteIOResult<()> { |
706 | self.write_u32be(val.to_bits()) | |
707 | } | |
708 | ||
28884194 | 709 | /// Writes 32-bit little-endian floating point number to the output. |
02a5bdaf KS |
710 | pub fn write_f32le(&mut self, val: f32) -> ByteIOResult<()> { |
711 | self.write_u32le(val.to_bits()) | |
712 | } | |
713 | ||
28884194 | 714 | /// Writes 64-bit big-endian floating point number to the output. |
02a5bdaf KS |
715 | pub fn write_f64be(&mut self, val: f64) -> ByteIOResult<()> { |
716 | self.write_u64be(val.to_bits()) | |
717 | } | |
718 | ||
28884194 | 719 | /// Writes 64-bit little-endian floating point number to the output. |
02a5bdaf KS |
720 | pub fn write_f64le(&mut self, val: f64) -> ByteIOResult<()> { |
721 | self.write_u64le(val.to_bits()) | |
722 | } | |
723 | ||
28884194 | 724 | /// Reports the current write position. |
d532000c KS |
725 | pub fn tell(&mut self) -> u64 { |
726 | self.io.tell() | |
727 | } | |
728 | ||
28884194 | 729 | /// Seeks to the requested position. |
d532000c KS |
730 | pub fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64> { |
731 | self.io.seek(pos) | |
732 | } | |
733 | ||
28884194 | 734 | /// Reports the amount of bytes the writer can still write (-1 if unknown). |
d532000c KS |
735 | pub fn size_left(&mut self) -> i64 { |
736 | let sz = self.io.size(); | |
737 | if sz == -1 { return -1; } | |
738 | sz - (self.tell() as i64) | |
739 | } | |
740 | } | |
741 | ||
742 | impl<'a> MemoryWriter<'a> { | |
743 | ||
28884194 | 744 | /// Constructs a new instance of `MemoryWriter`. |
d532000c | 745 | pub fn new_write(buf: &'a mut [u8]) -> Self { |
1be85e00 | 746 | MemoryWriter { buf, pos: 0 } |
d532000c KS |
747 | } |
748 | ||
749 | fn real_seek(&mut self, pos: i64) -> ByteIOResult<u64> { | |
1be85e00 | 750 | if pos < 0 || (pos as usize) > self.buf.len() { |
d532000c KS |
751 | return Err(ByteIOError::WrongRange) |
752 | } | |
753 | self.pos = pos as usize; | |
754 | Ok(pos as u64) | |
755 | } | |
756 | } | |
757 | ||
758 | impl<'a> ByteIO for MemoryWriter<'a> { | |
759 | #[allow(unused_variables)] | |
760 | fn read_byte(&mut self) -> ByteIOResult<u8> { | |
761 | Err(ByteIOError::NotImplemented) | |
762 | } | |
763 | ||
764 | #[allow(unused_variables)] | |
765 | fn peek_byte(&mut self) -> ByteIOResult<u8> { | |
766 | Err(ByteIOError::NotImplemented) | |
767 | } | |
768 | ||
769 | #[allow(unused_variables)] | |
770 | fn read_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
771 | Err(ByteIOError::NotImplemented) | |
772 | } | |
773 | ||
774 | #[allow(unused_variables)] | |
775 | fn read_buf_some(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
776 | Err(ByteIOError::NotImplemented) | |
777 | } | |
778 | ||
779 | #[allow(unused_variables)] | |
780 | fn peek_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
781 | Err(ByteIOError::NotImplemented) | |
782 | } | |
783 | ||
784 | fn write_buf(&mut self, buf: &[u8]) -> ByteIOResult<()> { | |
1be85e00 | 785 | if self.pos + buf.len() > self.buf.len() { return Err(ByteIOError::WriteError); } |
d532000c KS |
786 | for i in 0..buf.len() { |
787 | self.buf[self.pos + i] = buf[i]; | |
788 | } | |
789 | self.pos += buf.len(); | |
790 | Ok(()) | |
791 | } | |
792 | ||
793 | fn tell(&mut self) -> u64 { | |
794 | self.pos as u64 | |
795 | } | |
796 | ||
797 | fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64> { | |
1be85e00 KS |
798 | let cur_pos = self.pos as i64; |
799 | let cur_size = self.buf.len() as i64; | |
d532000c KS |
800 | match pos { |
801 | SeekFrom::Start(x) => self.real_seek(x as i64), | |
802 | SeekFrom::Current(x) => self.real_seek(cur_pos + x), | |
803 | SeekFrom::End(x) => self.real_seek(cur_size + x), | |
804 | } | |
805 | } | |
806 | ||
e243ceb4 | 807 | fn is_eof(&self) -> bool { |
1be85e00 | 808 | self.pos >= self.buf.len() |
d532000c KS |
809 | } |
810 | ||
811 | fn is_seekable(&mut self) -> bool { | |
812 | true | |
813 | } | |
814 | ||
815 | fn size(&mut self) -> i64 { | |
816 | self.buf.len() as i64 | |
817 | } | |
818 | } | |
819 | ||
5eb3cc60 | 820 | impl FileWriter { |
28884194 | 821 | /// Constructs a new instance of `FileWriter`. |
5eb3cc60 | 822 | pub fn new_write(file: File) -> Self { |
e243ceb4 | 823 | FileWriter { file } |
d532000c KS |
824 | } |
825 | } | |
826 | ||
5eb3cc60 | 827 | impl ByteIO for FileWriter { |
d532000c KS |
828 | #[allow(unused_variables)] |
829 | fn read_byte(&mut self) -> ByteIOResult<u8> { | |
830 | Err(ByteIOError::NotImplemented) | |
831 | } | |
832 | ||
833 | #[allow(unused_variables)] | |
834 | fn peek_byte(&mut self) -> ByteIOResult<u8> { | |
835 | Err(ByteIOError::NotImplemented) | |
836 | } | |
837 | ||
838 | #[allow(unused_variables)] | |
839 | fn read_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
840 | Err(ByteIOError::NotImplemented) | |
841 | } | |
842 | ||
843 | #[allow(unused_variables)] | |
844 | fn read_buf_some(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
845 | Err(ByteIOError::NotImplemented) | |
846 | } | |
847 | ||
848 | #[allow(unused_variables)] | |
849 | fn peek_buf(&mut self, buf: &mut [u8]) -> ByteIOResult<usize> { | |
850 | Err(ByteIOError::NotImplemented) | |
851 | } | |
852 | ||
853 | fn write_buf(&mut self, buf: &[u8]) -> ByteIOResult<()> { | |
854 | match self.file.write_all(buf) { | |
855 | Ok(()) => Ok(()), | |
856 | Err(_) => Err(ByteIOError::WriteError), | |
857 | } | |
858 | } | |
859 | ||
860 | fn tell(&mut self) -> u64 { | |
861 | self.file.seek(SeekFrom::Current(0)).unwrap() | |
862 | } | |
863 | ||
864 | fn seek(&mut self, pos: SeekFrom) -> ByteIOResult<u64> { | |
865 | let res = self.file.seek(pos); | |
866 | match res { | |
867 | Ok(r) => Ok(r), | |
868 | Err(_) => Err(ByteIOError::SeekError), | |
869 | } | |
870 | } | |
871 | ||
e243ceb4 | 872 | fn is_eof(&self) -> bool { |
d532000c KS |
873 | false |
874 | } | |
875 | ||
876 | fn is_seekable(&mut self) -> bool { | |
877 | true | |
878 | } | |
879 | ||
880 | fn size(&mut self) -> i64 { | |
881 | -1 | |
882 | } | |
90aa4e6b KS |
883 | } |
884 | ||
885 | #[cfg(test)] | |
886 | mod test { | |
887 | use super::*; | |
888 | use std::fs::File; | |
889 | ||
890 | #[test] | |
891 | fn test_read() { | |
892 | //const DATA : &'static [u8] = include_bytes!("../../assets/file"); | |
893 | let buf: [u8; 64] = [1; 64]; | |
894 | let mut mr = MemoryReader::new_read(&buf); | |
895 | let mut reader = ByteReader::new(&mut mr); | |
896 | assert_eq!(reader.read_byte().unwrap(), 0x01u8); | |
897 | assert_eq!(reader.read_u16le().unwrap(), 0x0101u16); | |
898 | assert_eq!(reader.read_u24le().unwrap(), 0x010101u32); | |
899 | assert_eq!(reader.read_u32le().unwrap(), 0x01010101u32); | |
900 | assert_eq!(reader.read_u64le().unwrap(), 0x0101010101010101u64); | |
1678d59a | 901 | let mut file = File::open("assets/Misc/MaoMacha.asx").unwrap(); |
90aa4e6b KS |
902 | let mut fr = FileReader::new_read(&mut file); |
903 | let mut br2 = ByteReader::new(&mut fr); | |
904 | assert_eq!(br2.read_byte().unwrap(), 0x30); | |
905 | assert_eq!(br2.read_u24be().unwrap(), 0x26B275); | |
906 | assert_eq!(br2.read_u24le().unwrap(), 0xCF668E); | |
907 | assert_eq!(br2.read_u32be().unwrap(), 0x11A6D900); | |
908 | assert_eq!(br2.read_u32le().unwrap(), 0xCE6200AA); | |
909 | } | |
910 | #[test] | |
911 | fn test_write() { | |
d532000c KS |
912 | let mut buf: [u8; 64] = [0; 64]; |
913 | { | |
914 | let mut mw = MemoryWriter::new_write(&mut buf); | |
915 | let mut bw = ByteWriter::new(&mut mw); | |
916 | bw.write_byte(0x00).unwrap(); | |
917 | bw.write_u16be(0x0102).unwrap(); | |
918 | bw.write_u24be(0x030405).unwrap(); | |
919 | bw.write_u32be(0x06070809).unwrap(); | |
920 | bw.write_u64be(0x0A0B0C0D0E0F1011).unwrap(); | |
921 | bw.write_byte(0x00).unwrap(); | |
922 | bw.write_u16le(0x0201).unwrap(); | |
923 | bw.write_u24le(0x050403).unwrap(); | |
924 | bw.write_u32le(0x09080706).unwrap(); | |
925 | bw.write_u64le(0x11100F0E0D0C0B0A).unwrap(); | |
926 | assert_eq!(bw.size_left(), 28); | |
927 | } | |
928 | for i in 0..0x12 { | |
929 | assert_eq!(buf[(i + 0x00) as usize], i); | |
930 | assert_eq!(buf[(i + 0x12) as usize], i); | |
931 | } | |
90aa4e6b KS |
932 | } |
933 | } |