From f05ea5814db095c43f48ba68a09250e9947432cb Mon Sep 17 00:00:00 2001 From: shenjack <3695888@qq.com> Date: Sat, 5 Aug 2023 13:59:41 +0800 Subject: [PATCH] =?UTF-8?q?mojang=E5=B0=B1=E6=98=AF=E6=9C=89=E6=AF=9B?= =?UTF-8?q?=E7=97=85?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- Cargo.toml | 4 ++ src/data.rs | 13 ++++-- src/main.rs | 118 +++++++++++++++++++++++++++++++++++++++++++++++ src/read.rs | 26 +++++++++-- src/rustfmt.toml | 8 ++-- 5 files changed, 157 insertions(+), 12 deletions(-) diff --git a/Cargo.toml b/Cargo.toml index 5362f3b..0899a44 100644 --- a/Cargo.toml +++ b/Cargo.toml @@ -6,3 +6,7 @@ edition = "2021" # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html [dependencies] + +[features] +default = [] +debug = [] diff --git a/src/data.rs b/src/data.rs index 398a901..9e1b8db 100644 --- a/src/data.rs +++ b/src/data.rs @@ -9,7 +9,7 @@ pub type NbtLength = i32; /// NBT 里的字符串独树一帜的把自己的长度用一个u32表示 /// 不如说为啥别的不用 u32 呢 -pub type StringLength = u32; +pub type StringLength = u16; /// Reader pub type Reader<'a> = Cursor<&'a [u8]>; @@ -112,7 +112,9 @@ impl From> for NbtList { impl From, NbtItem>> for NbtList { #[inline] - fn from(value: HashMap, NbtItem>) -> Self { Self::Compound(Rc::new(RefCell::new(value))) } + fn from(value: HashMap, NbtItem>) -> Self { + Self::Compound(Rc::new(RefCell::new(value))) + } } impl From> for NbtList { @@ -194,13 +196,16 @@ impl NbtValue { /// 直接读取 pub fn from_string(value: &mut Reader) -> Self { - let len: StringLength = Self::from_i32(value).as_i32().unwrap() as StringLength; + let len: StringLength = Self::from_i16(value).as_i16().unwrap() as StringLength; if len == 0 { return Self::String(Arc::from("")); } let mut buff = vec![0_u8; len as usize]; _ = value.read(&mut buff).unwrap(); - Self::String(Arc::from(String::from_utf8(buff).unwrap())) + let str = Arc::from(String::from_utf8(buff).unwrap()); + #[cfg(feature = "debug")] + println!("-----string len: {} value: |{}|", len, str); + Self::String(str) } /// 读取一个有类型无名称的值 (List) diff --git a/src/main.rs b/src/main.rs index f377ab0..42efff5 100644 --- a/src/main.rs +++ b/src/main.rs @@ -1,9 +1,127 @@ +#![feature(buf_read_has_data_left)] + mod data; mod read; fn main() { println!("Hello, world!"); + big_read_test(); } // bincode-org/bincode: A binary encoder / decoder implementation in Rust. // https://github.com/bincode-org/bincode + +fn big_read_test() { + let data: [u8; 0x21] = [ + 0x0A, 0x00, 0x0B, 0x68, 0x65, 0x6C, 0x6C, 0x6F, 0x20, 0x77, 0x6F, 0x72, 0x6C, 0x64, 0x08, 0x00, + 0x04, 0x6E, 0x61, 0x6D, 0x65, 0x00, 0x09, 0x42, 0x61, 0x6E, 0x61, 0x6E, 0x72, 0x61, 0x6D, 0x61, + 0x00 ]; + read_test(&data); + + let data: [u8; 0x608] = [ + 0x0A, 0x00, 0x05, 0x4C, 0x65, 0x76, 0x65, 0x6C, 0x04, 0x00, 0x08, 0x6C, 0x6F, 0x6E, 0x67, 0x54, + 0x65, 0x73, 0x74, 0x7F, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0x02, 0x00, 0x09, 0x73, 0x68, + 0x6F, 0x72, 0x74, 0x54, 0x65, 0x73, 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0x4C, 0x44, 0x46, 0x52, 0x04, 0x24, 0x4E, 0x1E, 0x5C, 0x40, 0x2E, 0x26, 0x28, 0x34, 0x4A, + 0x06, 0x30, 0x06, 0x00, 0x0A, 0x64, 0x6F, 0x75, 0x62, 0x6C, 0x65, 0x54, 0x65, 0x73, 0x74, 0x3F, + 0xDF, 0x8F, 0x6B, 0xBB, 0xFF, 0x6A, 0x5E, 0x00 ]; + read_test(&data); +} + +fn read_test(data: &[u8]) { + let cursor: std::io::Cursor<&[u8]> = std::io::Cursor::new(data); + println!("data: {:?}", data); + let nbt_data = data::NbtItem::try_from(cursor).unwrap(); + println!("nbt_data: {:#?}", nbt_data); +} diff --git a/src/read.rs b/src/read.rs index e1a5c6a..74bd3e2 100644 --- a/src/read.rs +++ b/src/read.rs @@ -1,6 +1,6 @@ use crate::data::{NbtItem, NbtList, NbtValue, Reader}; use std::convert::From; -use std::io::{Cursor, Read}; +use std::io::{BufRead, Cursor, Read}; /// 输出类型标识符 /// 类型标识符 @@ -164,17 +164,21 @@ pub mod read_data { // 进来直接是 values // loop 读取长度 name len name value value // 直到一个 End + #[cfg(feature = "debug")] + println!("reading compound {} bytes", value.position()); let mut map: HashMap, NbtItem> = HashMap::new(); loop { + // 读取 name + // 直接调之前的方法读 + let name = NbtValue::from_string(value).as_string().unwrap(); let mut type_tag = [0_u8; 1]; _ = value.read(&mut type_tag).unwrap(); + #[cfg(feature = "debug")] + println!("compound type tag {:?} with name: {:?}", type_tag, name); if type_tag == [0x00] { // End break; } - // 读取 name - // 直接调之前的方法读 - let name = NbtValue::from_string(value).as_string().unwrap(); // 读取 value let nbt_value: NbtItem = match type_tag { [0x01] => NbtItem::Value(NbtValue::from_bool(value)), @@ -203,6 +207,8 @@ pub mod read_data { }; // 读取完了，放进去 map.insert(name, nbt_value); + #[cfg(feature = "debug")] + println!("compound: {:?}", map); } NbtList::from(map) } @@ -229,10 +235,13 @@ impl TryFrom> for NbtItem { fn try_from(in_value: Reader) -> Result { let mut value: Reader = in_value.clone(); let mut items: Vec = Vec::new(); + #[cfg(feature = "debug")] + println!("reader pos: {:?}", value.position()); loop { // 读取类型 let mut buff = [0_u8; 1]; _ = value.read(&mut buff).unwrap(); + let name = NbtValue::from_string(&mut value).as_string().unwrap(); let type_code: NbtStatus = match buff { [0x00] => NbtStatus::End, [0x01] => NbtStatus::Going(NbtItem::Value(NbtValue::from_bool(&mut value))), @@ -256,12 +265,21 @@ impl TryFrom> for NbtItem { ), )), }; + #[cfg(feature = "debug")] + println!( + "==type_code: {:?} reader pos: {:?}", + buff, + value.position() + ); match type_code { NbtStatus::End => { break; } NbtStatus::Going(item) => { items.push(item); + if !value.has_data_left().unwrap() { + break; + } } NbtStatus::Error(e) => { return Err(e); diff --git a/src/rustfmt.toml b/src/rustfmt.toml index 83ba4b7..550e299 100644 --- a/src/rustfmt.toml +++ b/src/rustfmt.toml @@ -1,13 +1,13 @@ # cargo fmt config # 最大行长 -max_width = 150 +max_width = 100 # 链式调用的最大长度 -chain_width = 100 +chain_width = 80 # 数组的最大长度 -array_width = 100 +array_width = 80 # 函数参数的最大长度 -attr_fn_like_width = 100 +attr_fn_like_width = 80 # 函数调用参数的最大长度 fn_call_width = 80 # 简单函数格式化为单行