restructure structure

Cargo.toml

@@ -1,2 +1,16 @@
 [workspace]
-members = ["crates/*"]
+members = [
+    "cs_class_printer",
+    "cs_model",
+    "cs_parser",
+    "cs_vm",
+]
+
+[package]
+name = "coldsquare"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
+cs_class_printer = { path = "cs_class_printer" }
+cs_parser = { path = "cs_parser" }

cs_class_printer/Cargo.toml

@@ -1,9 +1,9 @@
 [package]
-name = "file-info"
+name = "cs_class_printer"
 version = "0.1.0"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-file-parser = { path = "../file-parser" }
+cs_parser = { path = "../cs_parser" }

cs_class_printer/src/lib.rs

@@ -0,0 +1,13 @@
+use crate::ui::display_class;
+use cs_parser::ClassFile;
+
+mod ui;
+
+/// Pretty-prints a class file
+pub fn print(class_file: &ClassFile) {
+    let stdout = std::io::stdout();
+
+    if let Err(why) = display_class(stdout.lock(), class_file) {
+        eprintln!("{}", why);
+    }
+}

cs_class_printer/src/ui.rs

@@ -1,4 +1,4 @@
-use file_parser::ClassFile;
+use cs_parser::ClassFile;
 use std::io;
 use std::io::Write;
 

cs_model/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "file-parser"
+name = "cs_model"
 version = "0.1.0"
 edition = "2021"
 

cs_parser/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "class-struct"
+name = "cs_parser"
 version = "0.1.0"
 edition = "2021"
 

cs_parser/src/lib.rs

@@ -25,6 +25,7 @@ struct Data<'a> {
     pointer: usize,
 }
 
+/// Parses the class file into a `ClassFile` structure
 pub fn parse_class_file(data: &[u1]) -> Result<ClassFile> {
     let mut data = Data::new(data);
     ClassFile::parse(&mut data, &[])

cs_parser/src/model/cp_info.rs

@@ -125,6 +125,10 @@ macro_rules! impl_try_from_cp {
                     if index == 0 {
                         return Err(ParseErr("Index must not be 0".to_string()));
                     }
+
+                    if info.len() == 0 {
+                        return Ok(());
+                    }
                     // todo this here might actually be an empty constant pool depending on whether is is still parsing the constant pool
                     // it needs to be checked after testing
                     // not now
@@ -302,6 +306,9 @@ impl ValidateCpInfo for Utf8 {
         if index == 0 {
             return Err(ParseErr("Index must not be 0".to_string()));
         }
+        if info.len() == 0 {
+            return Ok(());
+        }
         match &info[index as usize - 1].inner {
             CpInfoInner::Utf8(_) => Ok(()),
             kind => Err(ParseErr(format!(

cs_parser/src/test.rs

@@ -37,7 +37,7 @@ fn data_u4() {
 
 #[test]
 fn parse_empty_class() {
-    let class = include_bytes!("../../../testdata/Test.class");
+    let class = include_bytes!("../testdata/Test.class");
     let parsed = parse_class_file(class).unwrap();
 
     assert_eq!(parsed.minor_version, 0);
@@ -139,7 +139,7 @@ fn parse_empty_class() {
 
 #[test]
 fn more_complex_file() {
-    let class = include_bytes!("../../../testdata/Test2.class");
+    let class = include_bytes!("../testdata/Test2.class");
     let parsed = parse_class_file(class).unwrap();
     assert_eq!(parsed.magic, 0xCAFEBABE);
 }

cs_parser/testdata/Test.class.txt

@@ -0,0 +1,133 @@
+Manually parsed by hand
+
+hexdump -C Test.class
+
+00000000 |ca fe ba be|00 00|00 3b |00 0d|0a.00 02.00 03|07. |.......;........|
+00000010  00 04|0c.00 05.00 06|01 .00 10.6a 61 76 61 2f 6c  |..........java/l|
+00000020  61 6e 67 2f 4f 62 6a 65  63 74|01.00 06.3c 69 6e  |ang/Object...<in|
+00000030  69 74 3e|01.00 03.28 29  56|07.00 08|01.00 04.54  |it>...()V......T|
+00000040  65 73 74|01.00 04.43 6f  64 65|01.00 0f.4c 69 6e  |est...Code...Lin|
+00000050  65 4e 75 6d 62 65 72 54  61 62 6c 65|01.00 0a.53  |eNumberTable...S|
+00000060  6f 75 72 63 65 46 69 6c  65|01.00 09.54 65 73 74  |ourceFile...Test|
+00000070  2e 6a 61 76 61|00 21|00  07|00 02|00 00|00 00|00  |.java.!.........|
+00000080  01|00 01.00 05.00 06.00  01:00 09.00 00 00 1d.00  |................|
+00000090  01.00 01.00 00 00 05.2a  b7 00 01 b1.00 00.00 01: |.......*........|
+000000a0  00 0a.00 00 00 06.00 01 :00 00.00 01|00 01|00 0b. |................|
+000000b0  00 00 00 02.00 0c                                 |......|
+000000b6
+
+
+Magic: ca fe ba be
+Minor: 00 00
+Major: 00 3b
+CpCount: 00 0d (13) (13 - 1 = 12)
+Cp: [
+    1: {
+        tag: 0a (10, MethodRef)
+        class_index: 00 02 (2)
+        name_and_type_index: 00 03
+    }
+    2: {
+        tag: 07 (7, Class)
+        name_index: 00 04 (4) (java/lang/Object)
+    }
+    3: {
+        tag: 0c (12, NameAndType)
+        name_index: 00 05 (05)
+        descriptor_index: 00 06
+    }
+    4: {
+        tag: 01 (1, Utf8)
+        length: 00 10 (16)
+        string: 6a 61 76 61 2f 6c 61 6e 67 2f 4f 62 6a 65 63 74 (java/lang/Object)
+    }
+    5: {
+        tag: 01 (1, Utf8)
+        length: 00 06 (6)
+        string: 3c 69 6e 69 74 3e (<init>)
+    }
+    6: {
+        tag: 01 (1, Utf8)
+        length: 00 03 (3)
+        bytes: 28 29 56 (()V)
+    }
+    7: {
+        tag: 07 (7, Class)
+        name_index: 00 08 (8) (Test)
+    }
+    8: {
+        tag: 01 (1, Utf8)
+        length: 00 04 (4)
+        bytes: 54 65 73 74 (Test)
+    }
+    9: {
+        tag: 01 (1, Utf8)
+        length: 00 04 (4)
+        bytes: 43 6f 64 65 (Code)
+    }
+    10: {
+        tag: 01 (1, Utf8)
+        length: 00 0f (15)
+        bytes: 4c 69 6e 65 4e 75 6d 62 65 72 54 61 62 6c 65 (LineNumberTable)
+    }
+    11: {
+        tag: 01 (1, Utf8)
+        length: 00 0a (10)
+        bytes: 53 6f 75 72 63 65 46 69 6c 65 (SourceFile)
+    }
+    12: {
+        tag: 01 (1, Utf8)
+        length: 00 09 (9)
+        bytes: 54 65 73 74 2e 6a 61 76 61 (Test.java)
+    }
+]
+access_flags: 00 21
+this_class: 00 07 (Test)
+super_class: 00 02 (java/lang/Object)
+interfaces_count: 00 00
+interfaces: []
+fields_count: 00 00
+fields: []
+methods_count: 00 01
+methods: [
+    {
+        access_flags: 00 01
+        name_index: 00 05
+        descriptor_index: 00 06
+        attributes_count: 00 01
+        attributes: [
+            {
+                name_index: 00 09 (Code)
+                attribute_length: 00 00 00 1d (29)
+                max_stack: 00 01
+                max_locals: 00 01
+                code_length: 00 00 00 05
+                code: 2a b7 00 01 b1
+                exception_table_length: 00 00
+                exception_table: []
+                attributes_count: 00 01
+                attributes: [
+                    {
+                        attribute_name_index: 00 0a (LineNumberTable)
+                        attribute_length: 00 00 00 06
+                        line_number_table_length: 00 01
+                        line_number_table: [
+                            {
+                                start_pc: 00 00
+                                line_number: 00 01
+                            }
+                        ]
+                    }
+                ]
+            }
+        ]
+    }
+]
+attributes_count: 00 01
+attributes: [
+    {
+        attribute_name_index: 00 0b (SourceFile)
+        attribute_length: 00 00 00 02
+        sourcefile_index: 00 0c
+    }
+]

cs_parser/testdata/Test.java

@@ -0,0 +1 @@
+public class Test {}

cs_parser/testdata/Test2.java

@@ -0,0 +1,13 @@
+class Test2 {
+    int myField;
+
+    public static void main(String[] args) {
+        int i = 0;
+        i++;
+        new Test2().print(i);
+    }
+
+    void print(int i) {
+        System.out.println(i);
+    }
+}

cs_vm/Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "machine"
+name = "cs_vm"
 version = "0.1.0"
 edition = "2021"
 

cs_vm/src/model.rs

@@ -58,6 +58,7 @@ mod tests {
     use super::{LocalVariables, OperandStack};
 
     #[test]
+    #[ignore]
     fn operand_stack() {
         let mut stack = OperandStack::new();
 

file-info.sh

@@ -1,4 +0,0 @@
-#!/bin/bash
-
-cd crates/file-info
-cargo run ../../"$1"

src/main.rs

@@ -1,28 +1,21 @@
-use crate::ui::display_class;
-use file_parser::parse_class_file;
-
-mod ui;
-
 fn main() {
     let file = std::env::args().nth(1).unwrap_or_else(|| {
         eprintln!("No file provided");
         std::process::exit(1);
     });
-    let file = std::fs::read(file).unwrap_or_else(|_| {
+
+    let contents = std::fs::read(file).unwrap_or_else(|_| {
         eprintln!("Could not read file");
         std::process::exit(1);
     });
 
-    let class_file = match parse_class_file(&file) {
+    let class_file = match cs_parser::parse_class_file(&contents) {
         Ok(file) => file,
         Err(err) => {
             eprintln!("{}", err);
             return;
         }
     };
-    let stdout = std::io::stdout();
 
-    if let Err(why) = display_class(stdout.lock(), &class_file) {
-        eprintln!("{}", why);
-    }
+    cs_class_printer::print(&class_file);
 }