spacetime start

.gitignore

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+/target
+### Rust template
+# Generated by Cargo
+# will have compiled files and executables
+debug/
+target/
+
+# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+Cargo.lock
+
+# These are backup files generated by rustfmt
+**/*.rs.bk
+
+# MSVC Windows builds of rustc generate these, which store debugging information
+*.pdb
+
+# RustRover
+#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
+#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
+#  and can be added to the global gitignore or merged into this file.  For a more nuclear
+#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
+.idea/

Cargo.toml

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+[package]
+name = "jvm-rs"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+spacetimedb-sdk = { git = "https://github.com/infernap12/SpacetimeDB", branch = "class_de" }
+#spacetimedb-core = { git = "https://github.com/infernap12/SpacetimeDB", branch = "class_de" }
+#spacetimedb-lib = { git = "https://github.com/infernap12/SpacetimeDB", branch = "class_de" }
+#spacetimedb-sats = { git = "https://github.com/infernap12/SpacetimeDB", branch = "class_de" }
+#spacetimedb-client-api-messages = { git = "https://github.com/infernap12/SpacetimeDB", branch = "class_de" }
+#bindings = { git = "https://github.com/infernap12/bitcraft-bindings", branch = "class_de" }

src/main.rs

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+mod primatives;
+use std::fs;
+use std::fs::File;
+use std::io::Read;
+use spacetimedb_sdk::__codegen::{self as __sdk, __lib, __sats, __ws};
+use spacetimedb_sdk::__codegen::__lib::SpacetimeType;
+use spacetimedb_sdk::__codegen::__sats::bsatn;
+use deku_derive
+
+fn main() {
+    let mut class_file = File::open("./data/main.class").unwrap();
+    let mut bytes = Vec::new();
+    class_file.read_to_end(&mut bytes).unwrap();
+    let cf = bsatn::from_slice::<ClassFile>(&*bytes).unwrap();
+    println!("{:?}", cf);
+}
+
+
+
+#[deku(magic="")]
+pub struct ClassFile {
+    pub magic: u32,
+    pub minor_version: u16,
+    pub major_version: u16,
+    pub constant_pool: Vec<CpInfo>,  // Note: count is pool.len() + 1
+    pub access_flags: u16,
+    pub this_class: u16,
+    pub super_class: u16,
+    pub interfaces: Vec<u16>,
+    pub fields: Vec<FieldInfo>,
+    pub methods: Vec<MethodInfo>,
+    pub attributes: Vec<AttributeInfo>,
+}
+
+// Placeholder types - you'd need to define these based on the JVM spec
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub enum CpInfo {
+    NULL, // i think this is needed?
+    Utf8(&'static str),
+    NULLTWO, // needed again i think?
+    Integer(i32),
+    Float(f32),
+    Long(i64),
+    Double(f64),
+    Class(u16),
+    String(u16),
+    FieldRef,
+    MethodRef(u16, u16),
+    InterfaceMethodRef,
+    NameAndType,
+    NULLTHIRTEEN,
+    NULLFOURTEEN,
+    MethodHandle,
+    MethodType,
+    NULLSEVENTEEN,
+    InvokeDynamic,
+    Module,
+    Package
+}
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct FieldInfo {
+    // Field structure
+}
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct MethodInfo {
+    // Method structure
+}
+
+#[derive(__lib::ser::Serialize, __lib::de::Deserialize, Clone, PartialEq, Debug)]
+#[sats(crate = __lib)]
+pub struct AttributeInfo {
+    // Attribute structure
+}
+
+pub struct ConstantUtf8Info {
+    length: u16,
+    bytes: [u8],
+    vec: Vec<str>
+}